eventespresso / event-espresso-core

core/libraries/batch/BatchRequestProcessor.php

Spacing +8 added lines, -8 removed lines

@@ -117,7 +117,7 @@ 
 			$job_response = $job_handler->createJob($this->_job_parameters);
 			$this->validateResponse('createJob', $this->_job_id, $job_response);
 			$success = $this->_job_parameters->save();
-			if (! $success) {
+			if ( ! $success) {
 				throw new BatchRequestException(
 					sprintf(
 						esc_html__(
@@ -215,7 +215,7 @@ 
 		array $request_data = []
 	): JobHandlerInterface {
 
-		if (! class_exists($classname)) {
+		if ( ! class_exists($classname)) {
 			throw new BatchRequestException(
 				sprintf(
 					esc_html__(
@@ -227,7 +227,7 @@ 
 			);
 		}
 		$job_handler = $this->loader->getNew($classname);
-		if (! $job_handler instanceof JobHandlerInterface) {
+		if ( ! $job_handler instanceof JobHandlerInterface) {
 			throw new BatchRequestException(
 				sprintf(
 					esc_html__(
@@ -255,7 +255,7 @@ 
 	 */
 	protected function _get_error_response(Exception $exception, string $method_name): JobStepResponse
 	{
-		if (! $this->_job_parameters instanceof JobParameters) {
+		if ( ! $this->_job_parameters instanceof JobParameters) {
 			$this->_job_parameters = new JobParameters($this->_job_id, esc_html__('__Unknown__', 'event_espresso'), []);
 		}
 		$this->_job_parameters->set_status(JobParameters::status_error);
@@ -267,9 +267,9 @@ 
 			),
 			'<h4>',
 			get_class($exception),
-			'<code>' . 'BatchRunner::' . $method_name . '()</code>',
-			'</h4><p>' . $exception->getMessage() . '</p>',
-			'<pre>' . $exception->getTraceAsString() . '</pre>'
+			'<code>'.'BatchRunner::'.$method_name.'()</code>',
+			'</h4><p>'.$exception->getMessage().'</p>',
+			'<pre>'.$exception->getTraceAsString().'</pre>'
 		);
 		return new JobStepResponse(
 			$this->_job_parameters,
@@ -287,7 +287,7 @@ 
 	 */
 	private function validateResponse(string $function, string $job_id, $job_response)
 	{
-		if (! $job_response instanceof JobStepResponse) {
+		if ( ! $job_response instanceof JobStepResponse) {
 			throw new BatchRequestException(
 				sprintf(
 					esc_html__(

core/libraries/batch/Helpers/JobParameters.php

Spacing +8 added lines, -8 removed lines

@@ -191,7 +191,7 @@ 
 	 */
 	public static function load(string $job_id): JobParameters
 	{
-		$job_record         = new JobParametersWordPressOption(JobParameters::wp_option_prefix . $job_id);
+		$job_record         = new JobParametersWordPressOption(JobParameters::wp_option_prefix.$job_id);
 		$job_parameter_vars = $job_record->loadOption();
 		if (
 			! is_array($job_parameter_vars)
@@ -205,7 +205,7 @@ 
 						'event_espresso'
 					),
 					$job_id,
-					JobParameters::wp_option_prefix . $job_id
+					JobParameters::wp_option_prefix.$job_id
 				)
 			);
 		}
@@ -265,8 +265,8 @@ 
 	 */
 	public function request_datum(string $key, $default = '')
 	{
-		if (isset($this->_request_data[ $key ])) {
-			return $this->_request_data[ $key ];
+		if (isset($this->_request_data[$key])) {
+			return $this->_request_data[$key];
 		}
 		return $default;
 	}
@@ -281,8 +281,8 @@ 
 	 */
 	public function extra_datum(string $key, $default = '')
 	{
-		if (isset($this->_extra_data[ $key ])) {
-			return $this->_extra_data[ $key ];
+		if (isset($this->_extra_data[$key])) {
+			return $this->_extra_data[$key];
 		}
 		return $default;
 	}
@@ -296,7 +296,7 @@ 
 	 */
 	public function add_extra_data(string $key, $value)
 	{
-		$this->_extra_data[ $key ] = $value;
+		$this->_extra_data[$key] = $value;
 	}
 
 
@@ -419,7 +419,7 @@ 
 	 */
 	public function option_name(): string
 	{
-		return JobParameters::wp_option_prefix . $this->job_id();
+		return JobParameters::wp_option_prefix.$this->job_id();
 	}
 
 

core/libraries/batch/Helpers/JobStepResponse.php

Spacing +1 added lines, -1 removed lines

@@ -68,7 +68,7 @@
 		if (empty($this->_update_text)) {
 			return '';
 		}
-		$text = implode( "</p><p class='ee-batch-job-update'>", $this->_update_text);
+		$text = implode("</p><p class='ee-batch-job-update'>", $this->_update_text);
 		return "<p class='ee-batch-job-update'>$text</p>";
 	}
 

core/libraries/batch/JobHandlers/DatetimeOffsetFix.php

Indentation +467 added lines, -467 removed lines

@@ -23,471 +23,471 @@
 
 class DatetimeOffsetFix extends JobHandler
 {
-    /**
-     * Key for the option used to track which models have been processed when doing the batches.
-     */
-    const MODELS_TO_PROCESS_OPTION_KEY = 'ee_models_processed_for_datetime_offset_fix';
-
-
-    const COUNT_OF_MODELS_PROCESSED = 'ee_count_of_ee_models_processed_for_datetime_offset_fixed';
-
-    /**
-     * Key for the option used to track what the current offset is that will be applied when this tool is executed.
-     */
-    const OFFSET_TO_APPLY_OPTION_KEY = 'ee_datetime_offset_fix_offset_to_apply';
-
-
-    const OPTION_KEY_OFFSET_RANGE_START_DATE = 'ee_datetime_offset_start_date_range';
-
-
-    const OPTION_KEY_OFFSET_RANGE_END_DATE = 'ee_datetime_offset_end_date_range';
-
-
-    /**
-     * String labelling the datetime offset fix type for change-log entries.
-     */
-    const DATETIME_OFFSET_FIX_CHANGELOG_TYPE = 'datetime_offset_fix';
-
-
-    /**
-     * String labelling a datetime offset fix error for change-log entries.
-     */
-    const DATETIME_OFFSET_FIX_CHANGELOG_ERROR_TYPE = 'datetime_offset_fix_error';
-
-    /**
-     * @var EEM_Base[]
-     */
-    protected $models_with_datetime_fields = array();
-
-    // phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
-
-    /**
-     * Performs any necessary setup for starting the job. This is also a good
-     * place to setup the $job_arguments which will be used for subsequent HTTP requests
-     * when continue_job will be called
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function create_job(JobParameters $job_parameters)
-    {
-        $models_with_datetime_fields = $this->getModelsWithDatetimeFields();
-        // we'll be doing each model as a batch.
-        $job_parameters->set_job_size(count($models_with_datetime_fields));
-        return new JobStepResponse(
-            $job_parameters,
-            esc_html__('Starting Datetime Offset Fix', 'event_espresso')
-        );
-    }
-
-    /**
-     * Performs another step of the job
-     *
-     * @param JobParameters $job_parameters
-     * @param int           $batch_size
-     * @return JobStepResponse
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function continue_job(JobParameters $job_parameters, $batch_size = 50)
-    {
-        $models_to_process = $this->getModelsWithDatetimeFields();
-        // let's pop off the a model and do the query to apply the offset.
-        $model_to_process = array_pop($models_to_process);
-        // update our record
-        $this->setModelsToProcess($models_to_process);
-        $this->processModel($model_to_process);
-        $this->updateCountOfModelsProcessed();
-        $job_parameters->set_units_processed($this->getCountOfModelsProcessed());
-        if (count($models_to_process) > 0) {
-            $job_parameters->set_status(JobParameters::status_continue);
-        } else {
-            $job_parameters->set_status(JobParameters::status_complete);
-        }
-        return new JobStepResponse(
-            $job_parameters,
-            sprintf(
-                esc_html__('Updated the offset for all datetime fields on the %s model.', 'event_espresso'),
-                $model_to_process
-            )
-        );
-    }
-
-    /**
-     * Performs any clean-up logic when we know the job is completed
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @throws BatchRequestException
-     */
-    public function cleanup_job(JobParameters $job_parameters)
-    {
-        // delete important saved options.
-        delete_option(self::MODELS_TO_PROCESS_OPTION_KEY);
-        delete_option(self::COUNT_OF_MODELS_PROCESSED);
-        delete_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE);
-        delete_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE);
-        return new JobStepResponse($job_parameters, esc_html__(
-            'Offset has been applied to all affected fields.',
-            'event_espresso'
-        ));
-    }
-
-
-    /**
-     * Contains the logic for processing a model and applying the datetime offset to affected fields on that model.
-     *
-     * @param string $model_class_name
-     * @throws EE_Error
-     */
-    protected function processModel($model_class_name)
-    {
-        global $wpdb;
-        /** @var EEM_Base $model */
-        $model = $model_class_name::instance();
-        $original_offset = self::getOffset();
-        $start_date_range = self::getStartDateRange();
-        $end_date_range = self::getEndDateRange();
-        $sql_date_function = $original_offset > 0 ? 'DATE_ADD' : 'DATE_SUB';
-        $offset = abs($original_offset) * 60;
-        $date_ranges = array();
-        // since some affected models might have two tables, we have to get our tables and set up a query for each table.
-        foreach ($model->get_tables() as $table) {
-            $query = 'UPDATE ' . $table->get_table_name();
-            $fields_affected = array();
-            $inner_query = array();
-            foreach ($model->_get_fields_for_table($table->get_table_alias()) as $model_field) {
-                if ($model_field instanceof EE_Datetime_Field) {
-                    $inner_query[ $model_field->get_table_column() ] = $model_field->get_table_column() . ' = '
-                                                                       . $sql_date_function . '('
-                                                                       . $model_field->get_table_column()
-                                                                       . ", INTERVAL {$offset} MINUTE)";
-                    $fields_affected[] = $model_field;
-                }
-            }
-            if (! $fields_affected) {
-                continue;
-            }
-            // do we do one query per column/field or one query for all fields on the model? It all depends on whether
-            // there is a date range applied or not.
-            if ($start_date_range instanceof DbSafeDateTime || $end_date_range instanceof DbSafeDateTime) {
-                $result = $this->doQueryForEachField($query, $inner_query, $start_date_range, $end_date_range);
-            } else {
-                $result = $this->doQueryForAllFields($query, $inner_query);
-            }
-
-            // record appropriate logs for the query
-            switch (true) {
-                case $result === false:
-                    // record error.
-                    $error_message = $wpdb->last_error;
-                    // handle the edge cases where last_error might be empty.
-                    if (! $error_message) {
-                        $error_message = esc_html__('Unknown mysql error occurred.', 'event_espresso');
-                    }
-                    $this->recordChangeLog($model, $original_offset, $table, $fields_affected, $error_message);
-                    break;
-                case is_array($result) && ! empty($result):
-                    foreach ($result as $field_name => $error_message) {
-                        $this->recordChangeLog($model, $original_offset, $table, array($field_name), $error_message);
-                    }
-                    break;
-                default:
-                    $this->recordChangeLog($model, $original_offset, $table, $fields_affected);
-            }
-        }
-    }
-
-
-    /**
-     * Does the query on each $inner_query individually.
-     *
-     * @param string              $query
-     * @param array               $inner_query
-     * @param DbSafeDateTime|null $start_date_range
-     * @param DbSafeDateTime|null $end_date_range
-     * @return array  An array of any errors encountered and the fields they were for.
-     */
-    private function doQueryForEachField($query, array $inner_query, $start_date_range, $end_date_range)
-    {
-        global $wpdb;
-        $errors = array();
-        foreach ($inner_query as $field_name => $field_query) {
-            $query_to_run = $query;
-            $where_conditions = array();
-            $query_to_run .= ' SET ' . $field_query;
-            if ($start_date_range instanceof DbSafeDateTime) {
-                $start_date = $start_date_range->format(EE_Datetime_Field::mysql_timestamp_format);
-                $where_conditions[] = "{$field_name} > '{$start_date}'";
-            }
-            if ($end_date_range instanceof DbSafeDateTime) {
-                $end_date = $end_date_range->format(EE_Datetime_Field::mysql_timestamp_format);
-                $where_conditions[] = "{$field_name} < '{$end_date}'";
-            }
-            if ($where_conditions) {
-                $query_to_run .= ' WHERE ' . implode(' AND ', $where_conditions);
-            }
-            $result = $wpdb->query($query_to_run);
-            if ($result === false) {
-                // record error.
-                $error_message = $wpdb->last_error;
-                // handle the edgecases where last_error might be empty.
-                if (! $error_message) {
-                    $error_message = esc_html__('Unknown mysql error occured.', 'event_espresso');
-                }
-                $errors[ $field_name ] = $error_message;
-            }
-        }
-        return $errors;
-    }
-
-
-    /**
-     * Performs the query for all fields within the inner_query
-     *
-     * @param string $query
-     * @param array  $inner_query
-     * @return false|int
-     */
-    private function doQueryForAllFields($query, array $inner_query)
-    {
-        global $wpdb;
-        $query .= ' SET ' . implode(',', $inner_query);
-        return $wpdb->query($query);
-    }
-
-
-    /**
-     * Records a changelog entry using the given information.
-     *
-     * @param EEM_Base              $model
-     * @param float                 $offset
-     * @param EE_Table_Base         $table
-     * @param EE_Model_Field_Base[] $model_fields_affected
-     * @param string                $error_message If present then there was an error so let's record that instead.
-     * @throws EE_Error
-     */
-    private function recordChangeLog(
-        EEM_Base $model,
-        $offset,
-        EE_Table_Base $table,
-        $model_fields_affected,
-        $error_message = ''
-    ) {
-        // setup $fields list.
-        $fields = array();
-        /** @var EE_Datetime_Field $model_field */
-        foreach ($model_fields_affected as $model_field) {
-            if (! $model_field instanceof EE_Datetime_Field) {
-                continue;
-            }
-            $fields[] = $model_field->get_name();
-        }
-        // setup the message for the changelog entry.
-        $message = $error_message
-            ? sprintf(
-                esc_html__(
-                    'The %1$s table for the %2$s model did not have the offset of %3$f applied to its fields (%4$s), because of the following error:%5$s',
-                    'event_espresso'
-                ),
-                $table->get_table_name(),
-                $model->get_this_model_name(),
-                $offset,
-                implode(',', $fields),
-                $error_message
-            )
-            : sprintf(
-                esc_html__(
-                    'The %1$s table for the %2$s model has had the offset of %3$f applied to its following fields: %4$s',
-                    'event_espresso'
-                ),
-                $table->get_table_name(),
-                $model->get_this_model_name(),
-                $offset,
-                implode(',', $fields)
-            );
-        // write to the log
-        $changelog = EE_Change_Log::new_instance(array(
-            'LOG_type'    => $error_message
-                ? self::DATETIME_OFFSET_FIX_CHANGELOG_ERROR_TYPE
-                : self::DATETIME_OFFSET_FIX_CHANGELOG_TYPE,
-            'LOG_message' => $message,
-        ));
-        $changelog->save();
-    }
-
-
-    /**
-     * Returns an array of models that have datetime fields.
-     * This array is added to a short lived transient cache to keep having to build this list to a minimum.
-     *
-     * @return array an array of model class names.
-     * @throws EE_Error
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidArgumentException
-     */
-    private function getModelsWithDatetimeFields()
-    {
-        $this->getModelsToProcess();
-        if (! empty($this->models_with_datetime_fields)) {
-            return $this->models_with_datetime_fields;
-        }
-
-        $all_non_abstract_models = EE_Registry::instance()->non_abstract_db_models;
-        foreach ($all_non_abstract_models as $non_abstract_model) {
-            // get model instance
-            /** @var EEM_Base $non_abstract_model */
-            $non_abstract_model = $non_abstract_model::instance();
-            if ($non_abstract_model->get_a_field_of_type('EE_Datetime_Field') instanceof EE_Datetime_Field) {
-                $this->models_with_datetime_fields[] = get_class($non_abstract_model);
-            }
-        }
-        $this->setModelsToProcess($this->models_with_datetime_fields);
-        return $this->models_with_datetime_fields;
-    }
-
-
-    /**
-     * This simply records the models that have been processed with our tracking option.
-     *
-     * @param array $models_to_set array of model class names.
-     */
-    private function setModelsToProcess($models_to_set)
-    {
-        update_option(self::MODELS_TO_PROCESS_OPTION_KEY, $models_to_set);
-    }
-
-
-    /**
-     * Used to keep track of how many models have been processed for the batch
-     *
-     * @param $count
-     */
-    private function updateCountOfModelsProcessed($count = 1)
-    {
-        $count = $this->getCountOfModelsProcessed() + (int) $count;
-        update_option(self::COUNT_OF_MODELS_PROCESSED, $count);
-    }
-
-
-    /**
-     * Retrieve the tracked number of models processed between requests.
-     *
-     * @return int
-     */
-    private function getCountOfModelsProcessed()
-    {
-        return (int) get_option(self::COUNT_OF_MODELS_PROCESSED, 0);
-    }
-
-
-    /**
-     * Returns the models that are left to process.
-     *
-     * @return array  an array of model class names.
-     */
-    private function getModelsToProcess()
-    {
-        if (empty($this->models_with_datetime_fields)) {
-            $this->models_with_datetime_fields = get_option(self::MODELS_TO_PROCESS_OPTION_KEY, array());
-        }
-        return $this->models_with_datetime_fields;
-    }
-
-
-    /**
-     * Used to record the offset that will be applied to dates and times for EE_Datetime_Field columns.
-     *
-     * @param float $offset
-     */
-    public static function updateOffset($offset)
-    {
-        update_option(self::OFFSET_TO_APPLY_OPTION_KEY, $offset);
-    }
-
-
-    /**
-     * Used to retrieve the saved offset that will be applied to dates and times for EE_Datetime_Field columns.
-     *
-     * @return float
-     */
-    public static function getOffset()
-    {
-        return (float) get_option(self::OFFSET_TO_APPLY_OPTION_KEY, 0);
-    }
-
-
-    /**
-     * Used to set the saved offset range start date.
-     *
-     * @param DbSafeDateTime|null $start_date
-     */
-    public static function updateStartDateRange(DbSafeDateTime $start_date = null)
-    {
-        $date_to_save = $start_date instanceof DbSafeDateTime
-            ? $start_date->format('U')
-            : '';
-        update_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE, $date_to_save);
-    }
-
-
-    /**
-     * Used to get the saved offset range start date.
-     *
-     * @return DbSafeDateTime|null
-     */
-    public static function getStartDateRange()
-    {
-        $start_date = get_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE, null);
-        try {
-            $datetime = DateTime::createFromFormat('U', $start_date, new DateTimeZone('UTC'));
-            $start_date = $datetime instanceof DateTime
-                ? DbSafeDateTime::createFromDateTime($datetime)
-                : null;
-        } catch (Exception $e) {
-            $start_date = null;
-        }
-        return $start_date;
-    }
-
-
-    /**
-     * Used to set the saved offset range end date.
-     *
-     * @param DbSafeDateTime|null $end_date
-     */
-    public static function updateEndDateRange(DbSafeDateTime $end_date = null)
-    {
-        $date_to_save = $end_date instanceof DbSafeDateTime
-            ? $end_date->format('U')
-            : '';
-        update_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE, $date_to_save);
-    }
-
-
-    /**
-     * Used to get the saved offset range end date.
-     *
-     * @return DbSafeDateTime|null
-     */
-    public static function getEndDateRange()
-    {
-        $end_date = get_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE, null);
-        try {
-            $datetime = DateTime::createFromFormat('U', $end_date, new DateTimeZone('UTC'));
-            $end_date = $datetime instanceof Datetime
-                ? DbSafeDateTime::createFromDateTime($datetime)
-                : null;
-        } catch (Exception $e) {
-            $end_date = null;
-        }
-        return $end_date;
-    }
+	/**
+	 * Key for the option used to track which models have been processed when doing the batches.
+	 */
+	const MODELS_TO_PROCESS_OPTION_KEY = 'ee_models_processed_for_datetime_offset_fix';
+
+
+	const COUNT_OF_MODELS_PROCESSED = 'ee_count_of_ee_models_processed_for_datetime_offset_fixed';
+
+	/**
+	 * Key for the option used to track what the current offset is that will be applied when this tool is executed.
+	 */
+	const OFFSET_TO_APPLY_OPTION_KEY = 'ee_datetime_offset_fix_offset_to_apply';
+
+
+	const OPTION_KEY_OFFSET_RANGE_START_DATE = 'ee_datetime_offset_start_date_range';
+
+
+	const OPTION_KEY_OFFSET_RANGE_END_DATE = 'ee_datetime_offset_end_date_range';
+
+
+	/**
+	 * String labelling the datetime offset fix type for change-log entries.
+	 */
+	const DATETIME_OFFSET_FIX_CHANGELOG_TYPE = 'datetime_offset_fix';
+
+
+	/**
+	 * String labelling a datetime offset fix error for change-log entries.
+	 */
+	const DATETIME_OFFSET_FIX_CHANGELOG_ERROR_TYPE = 'datetime_offset_fix_error';
+
+	/**
+	 * @var EEM_Base[]
+	 */
+	protected $models_with_datetime_fields = array();
+
+	// phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+
+	/**
+	 * Performs any necessary setup for starting the job. This is also a good
+	 * place to setup the $job_arguments which will be used for subsequent HTTP requests
+	 * when continue_job will be called
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function create_job(JobParameters $job_parameters)
+	{
+		$models_with_datetime_fields = $this->getModelsWithDatetimeFields();
+		// we'll be doing each model as a batch.
+		$job_parameters->set_job_size(count($models_with_datetime_fields));
+		return new JobStepResponse(
+			$job_parameters,
+			esc_html__('Starting Datetime Offset Fix', 'event_espresso')
+		);
+	}
+
+	/**
+	 * Performs another step of the job
+	 *
+	 * @param JobParameters $job_parameters
+	 * @param int           $batch_size
+	 * @return JobStepResponse
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function continue_job(JobParameters $job_parameters, $batch_size = 50)
+	{
+		$models_to_process = $this->getModelsWithDatetimeFields();
+		// let's pop off the a model and do the query to apply the offset.
+		$model_to_process = array_pop($models_to_process);
+		// update our record
+		$this->setModelsToProcess($models_to_process);
+		$this->processModel($model_to_process);
+		$this->updateCountOfModelsProcessed();
+		$job_parameters->set_units_processed($this->getCountOfModelsProcessed());
+		if (count($models_to_process) > 0) {
+			$job_parameters->set_status(JobParameters::status_continue);
+		} else {
+			$job_parameters->set_status(JobParameters::status_complete);
+		}
+		return new JobStepResponse(
+			$job_parameters,
+			sprintf(
+				esc_html__('Updated the offset for all datetime fields on the %s model.', 'event_espresso'),
+				$model_to_process
+			)
+		);
+	}
+
+	/**
+	 * Performs any clean-up logic when we know the job is completed
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @throws BatchRequestException
+	 */
+	public function cleanup_job(JobParameters $job_parameters)
+	{
+		// delete important saved options.
+		delete_option(self::MODELS_TO_PROCESS_OPTION_KEY);
+		delete_option(self::COUNT_OF_MODELS_PROCESSED);
+		delete_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE);
+		delete_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE);
+		return new JobStepResponse($job_parameters, esc_html__(
+			'Offset has been applied to all affected fields.',
+			'event_espresso'
+		));
+	}
+
+
+	/**
+	 * Contains the logic for processing a model and applying the datetime offset to affected fields on that model.
+	 *
+	 * @param string $model_class_name
+	 * @throws EE_Error
+	 */
+	protected function processModel($model_class_name)
+	{
+		global $wpdb;
+		/** @var EEM_Base $model */
+		$model = $model_class_name::instance();
+		$original_offset = self::getOffset();
+		$start_date_range = self::getStartDateRange();
+		$end_date_range = self::getEndDateRange();
+		$sql_date_function = $original_offset > 0 ? 'DATE_ADD' : 'DATE_SUB';
+		$offset = abs($original_offset) * 60;
+		$date_ranges = array();
+		// since some affected models might have two tables, we have to get our tables and set up a query for each table.
+		foreach ($model->get_tables() as $table) {
+			$query = 'UPDATE ' . $table->get_table_name();
+			$fields_affected = array();
+			$inner_query = array();
+			foreach ($model->_get_fields_for_table($table->get_table_alias()) as $model_field) {
+				if ($model_field instanceof EE_Datetime_Field) {
+					$inner_query[ $model_field->get_table_column() ] = $model_field->get_table_column() . ' = '
+																	   . $sql_date_function . '('
+																	   . $model_field->get_table_column()
+																	   . ", INTERVAL {$offset} MINUTE)";
+					$fields_affected[] = $model_field;
+				}
+			}
+			if (! $fields_affected) {
+				continue;
+			}
+			// do we do one query per column/field or one query for all fields on the model? It all depends on whether
+			// there is a date range applied or not.
+			if ($start_date_range instanceof DbSafeDateTime || $end_date_range instanceof DbSafeDateTime) {
+				$result = $this->doQueryForEachField($query, $inner_query, $start_date_range, $end_date_range);
+			} else {
+				$result = $this->doQueryForAllFields($query, $inner_query);
+			}
+
+			// record appropriate logs for the query
+			switch (true) {
+				case $result === false:
+					// record error.
+					$error_message = $wpdb->last_error;
+					// handle the edge cases where last_error might be empty.
+					if (! $error_message) {
+						$error_message = esc_html__('Unknown mysql error occurred.', 'event_espresso');
+					}
+					$this->recordChangeLog($model, $original_offset, $table, $fields_affected, $error_message);
+					break;
+				case is_array($result) && ! empty($result):
+					foreach ($result as $field_name => $error_message) {
+						$this->recordChangeLog($model, $original_offset, $table, array($field_name), $error_message);
+					}
+					break;
+				default:
+					$this->recordChangeLog($model, $original_offset, $table, $fields_affected);
+			}
+		}
+	}
+
+
+	/**
+	 * Does the query on each $inner_query individually.
+	 *
+	 * @param string              $query
+	 * @param array               $inner_query
+	 * @param DbSafeDateTime|null $start_date_range
+	 * @param DbSafeDateTime|null $end_date_range
+	 * @return array  An array of any errors encountered and the fields they were for.
+	 */
+	private function doQueryForEachField($query, array $inner_query, $start_date_range, $end_date_range)
+	{
+		global $wpdb;
+		$errors = array();
+		foreach ($inner_query as $field_name => $field_query) {
+			$query_to_run = $query;
+			$where_conditions = array();
+			$query_to_run .= ' SET ' . $field_query;
+			if ($start_date_range instanceof DbSafeDateTime) {
+				$start_date = $start_date_range->format(EE_Datetime_Field::mysql_timestamp_format);
+				$where_conditions[] = "{$field_name} > '{$start_date}'";
+			}
+			if ($end_date_range instanceof DbSafeDateTime) {
+				$end_date = $end_date_range->format(EE_Datetime_Field::mysql_timestamp_format);
+				$where_conditions[] = "{$field_name} < '{$end_date}'";
+			}
+			if ($where_conditions) {
+				$query_to_run .= ' WHERE ' . implode(' AND ', $where_conditions);
+			}
+			$result = $wpdb->query($query_to_run);
+			if ($result === false) {
+				// record error.
+				$error_message = $wpdb->last_error;
+				// handle the edgecases where last_error might be empty.
+				if (! $error_message) {
+					$error_message = esc_html__('Unknown mysql error occured.', 'event_espresso');
+				}
+				$errors[ $field_name ] = $error_message;
+			}
+		}
+		return $errors;
+	}
+
+
+	/**
+	 * Performs the query for all fields within the inner_query
+	 *
+	 * @param string $query
+	 * @param array  $inner_query
+	 * @return false|int
+	 */
+	private function doQueryForAllFields($query, array $inner_query)
+	{
+		global $wpdb;
+		$query .= ' SET ' . implode(',', $inner_query);
+		return $wpdb->query($query);
+	}
+
+
+	/**
+	 * Records a changelog entry using the given information.
+	 *
+	 * @param EEM_Base              $model
+	 * @param float                 $offset
+	 * @param EE_Table_Base         $table
+	 * @param EE_Model_Field_Base[] $model_fields_affected
+	 * @param string                $error_message If present then there was an error so let's record that instead.
+	 * @throws EE_Error
+	 */
+	private function recordChangeLog(
+		EEM_Base $model,
+		$offset,
+		EE_Table_Base $table,
+		$model_fields_affected,
+		$error_message = ''
+	) {
+		// setup $fields list.
+		$fields = array();
+		/** @var EE_Datetime_Field $model_field */
+		foreach ($model_fields_affected as $model_field) {
+			if (! $model_field instanceof EE_Datetime_Field) {
+				continue;
+			}
+			$fields[] = $model_field->get_name();
+		}
+		// setup the message for the changelog entry.
+		$message = $error_message
+			? sprintf(
+				esc_html__(
+					'The %1$s table for the %2$s model did not have the offset of %3$f applied to its fields (%4$s), because of the following error:%5$s',
+					'event_espresso'
+				),
+				$table->get_table_name(),
+				$model->get_this_model_name(),
+				$offset,
+				implode(',', $fields),
+				$error_message
+			)
+			: sprintf(
+				esc_html__(
+					'The %1$s table for the %2$s model has had the offset of %3$f applied to its following fields: %4$s',
+					'event_espresso'
+				),
+				$table->get_table_name(),
+				$model->get_this_model_name(),
+				$offset,
+				implode(',', $fields)
+			);
+		// write to the log
+		$changelog = EE_Change_Log::new_instance(array(
+			'LOG_type'    => $error_message
+				? self::DATETIME_OFFSET_FIX_CHANGELOG_ERROR_TYPE
+				: self::DATETIME_OFFSET_FIX_CHANGELOG_TYPE,
+			'LOG_message' => $message,
+		));
+		$changelog->save();
+	}
+
+
+	/**
+	 * Returns an array of models that have datetime fields.
+	 * This array is added to a short lived transient cache to keep having to build this list to a minimum.
+	 *
+	 * @return array an array of model class names.
+	 * @throws EE_Error
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidArgumentException
+	 */
+	private function getModelsWithDatetimeFields()
+	{
+		$this->getModelsToProcess();
+		if (! empty($this->models_with_datetime_fields)) {
+			return $this->models_with_datetime_fields;
+		}
+
+		$all_non_abstract_models = EE_Registry::instance()->non_abstract_db_models;
+		foreach ($all_non_abstract_models as $non_abstract_model) {
+			// get model instance
+			/** @var EEM_Base $non_abstract_model */
+			$non_abstract_model = $non_abstract_model::instance();
+			if ($non_abstract_model->get_a_field_of_type('EE_Datetime_Field') instanceof EE_Datetime_Field) {
+				$this->models_with_datetime_fields[] = get_class($non_abstract_model);
+			}
+		}
+		$this->setModelsToProcess($this->models_with_datetime_fields);
+		return $this->models_with_datetime_fields;
+	}
+
+
+	/**
+	 * This simply records the models that have been processed with our tracking option.
+	 *
+	 * @param array $models_to_set array of model class names.
+	 */
+	private function setModelsToProcess($models_to_set)
+	{
+		update_option(self::MODELS_TO_PROCESS_OPTION_KEY, $models_to_set);
+	}
+
+
+	/**
+	 * Used to keep track of how many models have been processed for the batch
+	 *
+	 * @param $count
+	 */
+	private function updateCountOfModelsProcessed($count = 1)
+	{
+		$count = $this->getCountOfModelsProcessed() + (int) $count;
+		update_option(self::COUNT_OF_MODELS_PROCESSED, $count);
+	}
+
+
+	/**
+	 * Retrieve the tracked number of models processed between requests.
+	 *
+	 * @return int
+	 */
+	private function getCountOfModelsProcessed()
+	{
+		return (int) get_option(self::COUNT_OF_MODELS_PROCESSED, 0);
+	}
+
+
+	/**
+	 * Returns the models that are left to process.
+	 *
+	 * @return array  an array of model class names.
+	 */
+	private function getModelsToProcess()
+	{
+		if (empty($this->models_with_datetime_fields)) {
+			$this->models_with_datetime_fields = get_option(self::MODELS_TO_PROCESS_OPTION_KEY, array());
+		}
+		return $this->models_with_datetime_fields;
+	}
+
+
+	/**
+	 * Used to record the offset that will be applied to dates and times for EE_Datetime_Field columns.
+	 *
+	 * @param float $offset
+	 */
+	public static function updateOffset($offset)
+	{
+		update_option(self::OFFSET_TO_APPLY_OPTION_KEY, $offset);
+	}
+
+
+	/**
+	 * Used to retrieve the saved offset that will be applied to dates and times for EE_Datetime_Field columns.
+	 *
+	 * @return float
+	 */
+	public static function getOffset()
+	{
+		return (float) get_option(self::OFFSET_TO_APPLY_OPTION_KEY, 0);
+	}
+
+
+	/**
+	 * Used to set the saved offset range start date.
+	 *
+	 * @param DbSafeDateTime|null $start_date
+	 */
+	public static function updateStartDateRange(DbSafeDateTime $start_date = null)
+	{
+		$date_to_save = $start_date instanceof DbSafeDateTime
+			? $start_date->format('U')
+			: '';
+		update_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE, $date_to_save);
+	}
+
+
+	/**
+	 * Used to get the saved offset range start date.
+	 *
+	 * @return DbSafeDateTime|null
+	 */
+	public static function getStartDateRange()
+	{
+		$start_date = get_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE, null);
+		try {
+			$datetime = DateTime::createFromFormat('U', $start_date, new DateTimeZone('UTC'));
+			$start_date = $datetime instanceof DateTime
+				? DbSafeDateTime::createFromDateTime($datetime)
+				: null;
+		} catch (Exception $e) {
+			$start_date = null;
+		}
+		return $start_date;
+	}
+
+
+	/**
+	 * Used to set the saved offset range end date.
+	 *
+	 * @param DbSafeDateTime|null $end_date
+	 */
+	public static function updateEndDateRange(DbSafeDateTime $end_date = null)
+	{
+		$date_to_save = $end_date instanceof DbSafeDateTime
+			? $end_date->format('U')
+			: '';
+		update_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE, $date_to_save);
+	}
+
+
+	/**
+	 * Used to get the saved offset range end date.
+	 *
+	 * @return DbSafeDateTime|null
+	 */
+	public static function getEndDateRange()
+	{
+		$end_date = get_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE, null);
+		try {
+			$datetime = DateTime::createFromFormat('U', $end_date, new DateTimeZone('UTC'));
+			$end_date = $datetime instanceof Datetime
+				? DbSafeDateTime::createFromDateTime($datetime)
+				: null;
+		} catch (Exception $e) {
+			$end_date = null;
+		}
+		return $end_date;
+	}
 }

Spacing +12 added lines, -12 removed lines

@@ -159,19 +159,19 @@ 
         $date_ranges = array();
         // since some affected models might have two tables, we have to get our tables and set up a query for each table.
         foreach ($model->get_tables() as $table) {
-            $query = 'UPDATE ' . $table->get_table_name();
+            $query = 'UPDATE '.$table->get_table_name();
             $fields_affected = array();
             $inner_query = array();
             foreach ($model->_get_fields_for_table($table->get_table_alias()) as $model_field) {
                 if ($model_field instanceof EE_Datetime_Field) {
-                    $inner_query[ $model_field->get_table_column() ] = $model_field->get_table_column() . ' = '
-                                                                       . $sql_date_function . '('
+                    $inner_query[$model_field->get_table_column()] = $model_field->get_table_column().' = '
+                                                                       . $sql_date_function.'('
                                                                        . $model_field->get_table_column()
                                                                        . ", INTERVAL {$offset} MINUTE)";
                     $fields_affected[] = $model_field;
                 }
             }
-            if (! $fields_affected) {
+            if ( ! $fields_affected) {
                 continue;
             }
             // do we do one query per column/field or one query for all fields on the model? It all depends on whether
@@ -188,7 +188,7 @@ 
                     // record error.
                     $error_message = $wpdb->last_error;
                     // handle the edge cases where last_error might be empty.
-                    if (! $error_message) {
+                    if ( ! $error_message) {
                         $error_message = esc_html__('Unknown mysql error occurred.', 'event_espresso');
                     }
                     $this->recordChangeLog($model, $original_offset, $table, $fields_affected, $error_message);
@@ -221,7 +221,7 @@ 
         foreach ($inner_query as $field_name => $field_query) {
             $query_to_run = $query;
             $where_conditions = array();
-            $query_to_run .= ' SET ' . $field_query;
+            $query_to_run .= ' SET '.$field_query;
             if ($start_date_range instanceof DbSafeDateTime) {
                 $start_date = $start_date_range->format(EE_Datetime_Field::mysql_timestamp_format);
                 $where_conditions[] = "{$field_name} > '{$start_date}'";
@@ -231,17 +231,17 @@ 
                 $where_conditions[] = "{$field_name} < '{$end_date}'";
             }
             if ($where_conditions) {
-                $query_to_run .= ' WHERE ' . implode(' AND ', $where_conditions);
+                $query_to_run .= ' WHERE '.implode(' AND ', $where_conditions);
             }
             $result = $wpdb->query($query_to_run);
             if ($result === false) {
                 // record error.
                 $error_message = $wpdb->last_error;
                 // handle the edgecases where last_error might be empty.
-                if (! $error_message) {
+                if ( ! $error_message) {
                     $error_message = esc_html__('Unknown mysql error occured.', 'event_espresso');
                 }
-                $errors[ $field_name ] = $error_message;
+                $errors[$field_name] = $error_message;
             }
         }
         return $errors;
@@ -258,7 +258,7 @@ 
     private function doQueryForAllFields($query, array $inner_query)
     {
         global $wpdb;
-        $query .= ' SET ' . implode(',', $inner_query);
+        $query .= ' SET '.implode(',', $inner_query);
         return $wpdb->query($query);
     }
 
@@ -284,7 +284,7 @@ 
         $fields = array();
         /** @var EE_Datetime_Field $model_field */
         foreach ($model_fields_affected as $model_field) {
-            if (! $model_field instanceof EE_Datetime_Field) {
+            if ( ! $model_field instanceof EE_Datetime_Field) {
                 continue;
             }
             $fields[] = $model_field->get_name();
@@ -336,7 +336,7 @@ 
     private function getModelsWithDatetimeFields()
     {
         $this->getModelsToProcess();
-        if (! empty($this->models_with_datetime_fields)) {
+        if ( ! empty($this->models_with_datetime_fields)) {
             return $this->models_with_datetime_fields;
         }
 

core/libraries/batch/JobHandlerBaseClasses/JobHandler.php

Spacing +1 added lines, -1 removed lines

@@ -128,7 +128,7 @@
 	 */
 	public function getRequestData($key)
 	{
-		return $this->request_data[ $key] ?? null;
+		return $this->request_data[$key] ?? null;
 	}
 
 

core/EE_Dependency_Map.core.php

Indentation +1127 added lines, -1127 removed lines

@@ -20,1132 +20,1132 @@
  */
 class EE_Dependency_Map
 {
-    /**
-     * This means that the requested class dependency is not present in the dependency map
-     */
-    const not_registered = 0;
-
-    /**
-     * This instructs class loaders to ALWAYS return a newly instantiated object for the requested class.
-     */
-    const load_new_object = 1;
-
-    /**
-     * This instructs class loaders to return a previously instantiated and cached object for the requested class.
-     * IF a previously instantiated object does not exist, a new one will be created and added to the cache.
-     */
-    const load_from_cache = 2;
-
-    /**
-     * When registering a dependency,
-     * this indicates to keep any existing dependencies that already exist,
-     * and simply discard any new dependencies declared in the incoming data
-     */
-    const KEEP_EXISTING_DEPENDENCIES = 0;
-
-    /**
-     * When registering a dependency,
-     * this indicates to overwrite any existing dependencies that already exist using the incoming data
-     */
-    const OVERWRITE_DEPENDENCIES = 1;
-
-    /**
-     * @type EE_Dependency_Map $_instance
-     */
-    protected static $_instance;
-
-    /**
-     * @var ClassInterfaceCache $class_cache
-     */
-    private $class_cache;
-
-    /**
-     * @type RequestInterface $request
-     */
-    protected $request;
-
-    /**
-     * @type LegacyRequestInterface $legacy_request
-     */
-    protected $legacy_request;
-
-    /**
-     * @type ResponseInterface $response
-     */
-    protected $response;
-
-    /**
-     * @type LoaderInterface $loader
-     */
-    protected $loader;
-
-    /**
-     * @type array $_dependency_map
-     */
-    protected $_dependency_map = [];
-
-    /**
-     * @type array $_class_loaders
-     */
-    protected $_class_loaders = [];
-
-
-    /**
-     * EE_Dependency_Map constructor.
-     *
-     * @param ClassInterfaceCache $class_cache
-     */
-    protected function __construct(ClassInterfaceCache $class_cache)
-    {
-        $this->class_cache = $class_cache;
-        do_action('EE_Dependency_Map____construct', $this);
-    }
-
-
-    /**
-     * @return void
-     * @throws InvalidAliasException
-     */
-    public function initialize()
-    {
-        $this->_register_core_dependencies();
-        $this->_register_core_class_loaders();
-        $this->_register_core_aliases();
-    }
-
-
-    /**
-     * @singleton method used to instantiate class object
-     * @param ClassInterfaceCache|null $class_cache
-     * @return EE_Dependency_Map
-     */
-    public static function instance(ClassInterfaceCache $class_cache = null): EE_Dependency_Map
-    {
-        // check if class object is instantiated, and instantiated properly
-        if (
-            ! EE_Dependency_Map::$_instance instanceof EE_Dependency_Map
-            && $class_cache instanceof ClassInterfaceCache
-        ) {
-            EE_Dependency_Map::$_instance = new EE_Dependency_Map($class_cache);
-        }
-        return EE_Dependency_Map::$_instance;
-    }
-
-
-    /**
-     * @param RequestInterface $request
-     */
-    public function setRequest(RequestInterface $request)
-    {
-        $this->request = $request;
-    }
-
-
-    /**
-     * @param LegacyRequestInterface $legacy_request
-     */
-    public function setLegacyRequest(LegacyRequestInterface $legacy_request)
-    {
-        $this->legacy_request = $legacy_request;
-    }
-
-
-    /**
-     * @param ResponseInterface $response
-     */
-    public function setResponse(ResponseInterface $response)
-    {
-        $this->response = $response;
-    }
-
-
-    /**
-     * @param LoaderInterface $loader
-     */
-    public function setLoader(LoaderInterface $loader)
-    {
-        $this->loader = $loader;
-    }
-
-
-    /**
-     * @param string $class
-     * @param array  $dependencies
-     * @param int    $overwrite
-     * @return bool
-     */
-    public static function register_dependencies(
-        string $class,
-        array $dependencies,
-        int $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
-    ): bool {
-        return EE_Dependency_Map::$_instance->registerDependencies($class, $dependencies, $overwrite);
-    }
-
-
-    /**
-     * Assigns an array of class names and corresponding load sources (new or cached)
-     * to the class specified by the first parameter.
-     * IMPORTANT !!!
-     * The order of elements in the incoming $dependencies array MUST match
-     * the order of the constructor parameters for the class in question.
-     * This is especially important when overriding any existing dependencies that are registered.
-     * the third parameter controls whether any duplicate dependencies are overwritten or not.
-     *
-     * @param string $class
-     * @param array  $dependencies
-     * @param int    $overwrite
-     * @return bool
-     */
-    public function registerDependencies(
-        string $class,
-        array $dependencies,
-        int $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
-    ): bool {
-        $class      = trim($class, '\\');
-        $registered = false;
-        if (empty(EE_Dependency_Map::$_instance->_dependency_map[ $class ])) {
-            EE_Dependency_Map::$_instance->_dependency_map[ $class ] = [];
-        }
-        // we need to make sure that any aliases used when registering a dependency
-        // get resolved to the correct class name
-        foreach ($dependencies as $dependency => $load_source) {
-            $alias = EE_Dependency_Map::$_instance->getFqnForAlias($dependency);
-            if (
-                $overwrite === EE_Dependency_Map::OVERWRITE_DEPENDENCIES
-                || ! isset(EE_Dependency_Map::$_instance->_dependency_map[ $class ][ $alias ])
-            ) {
-                unset($dependencies[ $dependency ]);
-                $dependencies[ $alias ] = $load_source;
-                $registered             = true;
-            }
-        }
-        // now add our two lists of dependencies together.
-        // using Union (+=) favours the arrays in precedence from left to right,
-        // so $dependencies is NOT overwritten because it is listed first
-        // ie: with A = B + C, entries in B take precedence over duplicate entries in C
-        // Union is way faster than array_merge() but should be used with caution...
-        // especially with numerically indexed arrays
-        $dependencies += EE_Dependency_Map::$_instance->_dependency_map[ $class ];
-        // now we need to ensure that the resulting dependencies
-        // array only has the entries that are required for the class
-        // so first count how many dependencies were originally registered for the class
-        $dependency_count = count(EE_Dependency_Map::$_instance->_dependency_map[ $class ]);
-        // if that count is non-zero (meaning dependencies were already registered)
-        EE_Dependency_Map::$_instance->_dependency_map[ $class ] = $dependency_count
-            // then truncate the  final array to match that count
-            ? array_slice($dependencies, 0, $dependency_count)
-            // otherwise just take the incoming array because nothing previously existed
-            : $dependencies;
-        return $registered;
-    }
-
-
-    /**
-     * @param string          $class_name
-     * @param callable|string $loader
-     * @param bool            $overwrite
-     * @return bool
-     * @throws DomainException
-     */
-    public static function register_class_loader(
-        string $class_name,
-        $loader = 'load_core',
-        bool $overwrite = false
-    ): bool {
-        return EE_Dependency_Map::$_instance->registerClassLoader($class_name, $loader, $overwrite);
-    }
-
-
-    /**
-     * @param string $class_name
-     * @param Closure|string $loader
-     * @param bool   $overwrite
-     * @return bool
-     * @throws DomainException
-     */
-    public function registerClassLoader(string $class_name, $loader = 'load_core', bool $overwrite = false): bool
-    {
-        if (! $loader instanceof Closure && strpos($class_name, '\\') !== false) {
-            throw new DomainException(
-                esc_html__('Don\'t use class loaders for FQCNs.', 'event_espresso')
-            );
-        }
-        // check that loader is callable or method starts with "load_" and exists in EE_Registry
-        if (
-            ! is_callable($loader)
-            && (
-                strpos($loader, 'load_') !== 0
-                || ! method_exists('EE_Registry', $loader)
-            )
-        ) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__(
-                        '"%1$s" is not a valid loader method on EE_Registry.',
-                        'event_espresso'
-                    ),
-                    $loader
-                )
-            );
-        }
-        $class_name = EE_Dependency_Map::$_instance->getFqnForAlias($class_name);
-        if ($overwrite || ! isset(EE_Dependency_Map::$_instance->_class_loaders[ $class_name ])) {
-            EE_Dependency_Map::$_instance->_class_loaders[ $class_name ] = $loader;
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * @return array
-     */
-    public function dependency_map(): array
-    {
-        return $this->_dependency_map;
-    }
-
-
-    /**
-     * returns TRUE if dependency map contains a listing for the provided class name
-     *
-     * @param string $class_name
-     * @return boolean
-     */
-    public function has(string $class_name = ''): bool
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        return isset($this->_dependency_map[ $class_name ]);
-    }
-
-
-    /**
-     * returns TRUE if dependency map contains a listing for the provided class name AND dependency
-     *
-     * @param string $class_name
-     * @param string $dependency
-     * @return bool
-     */
-    public function has_dependency_for_class(string $class_name = '', string $dependency = ''): bool
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        $dependency = $this->getFqnForAlias($dependency, $class_name);
-        return isset($this->_dependency_map[ $class_name ][ $dependency ]);
-    }
-
-
-    /**
-     * returns loading strategy for whether a previously cached dependency should be loaded or a new instance returned
-     *
-     * @param string $class_name
-     * @param string $dependency
-     * @return int
-     */
-    public function loading_strategy_for_class_dependency(string $class_name = '', string $dependency = ''): int
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        $dependency = $this->getFqnForAlias($dependency);
-        return $this->has_dependency_for_class($class_name, $dependency)
-            ? $this->_dependency_map[ $class_name ][ $dependency ]
-            : EE_Dependency_Map::not_registered;
-    }
-
-
-    /**
-     * @param string $class_name
-     * @return string | Closure
-     */
-    public function class_loader(string $class_name)
-    {
-        // all legacy models use load_model()
-        if (strpos($class_name, 'EEM_') === 0) {
-            return 'load_model';
-        }
-        // EE_CPT_*_Strategy classes like EE_CPT_Event_Strategy, EE_CPT_Venue_Strategy, etc
-        // perform strpos() first to avoid loading regex every time we load a class
-        if (
-            strpos($class_name, 'EE_CPT_') === 0
-            && preg_match('/^EE_CPT_([a-zA-Z]+)_Strategy$/', $class_name)
-        ) {
-            return 'load_core';
-        }
-        $class_name = $this->getFqnForAlias($class_name);
-        return $this->_class_loaders[ $class_name ] ?? '';
-    }
-
-
-    /**
-     * @return array
-     */
-    public function class_loaders(): array
-    {
-        return $this->_class_loaders;
-    }
-
-
-    /**
-     * adds an alias for a classname
-     *
-     * @param string $fqcn      the class name that should be used (concrete class to replace interface)
-     * @param string $alias     the class name that would be type hinted for (abstract parent or interface)
-     * @param string $for_class the class that has the dependency (is type hinting for the interface)
-     * @throws InvalidAliasException
-     */
-    public function add_alias(string $fqcn, string $alias, string $for_class = '')
-    {
-        $this->class_cache->addAlias($fqcn, $alias, $for_class);
-    }
-
-
-    /**
-     * Returns TRUE if the provided fully qualified name IS an alias
-     * WHY?
-     * Because if a class is type hinting for a concretion,
-     * then why would we need to find another class to supply it?
-     * ie: if a class asks for `Fully/Qualified/Namespace/SpecificClassName`,
-     * then give it an instance of `Fully/Qualified/Namespace/SpecificClassName`.
-     * Don't go looking for some substitute.
-     * Whereas if a class is type hinting for an interface...
-     * then we need to find an actual class to use.
-     * So the interface IS the alias for some other FQN,
-     * and we need to find out if `Fully/Qualified/Namespace/SomeInterface`
-     * represents some other class.
-     *
-     * @param string $fqn
-     * @param string $for_class
-     * @return bool
-     */
-    public function isAlias(string $fqn = '', string $for_class = ''): bool
-    {
-        return $this->class_cache->isAlias($fqn, $for_class);
-    }
-
-
-    /**
-     * Returns a FQN for provided alias if one exists, otherwise returns the original $alias
-     * functions recursively, so that multiple aliases can be used to drill down to a FQN
-     *  for example:
-     *      if the following two entries were added to the _aliases array:
-     *          array(
-     *              'interface_alias'           => 'some\namespace\interface'
-     *              'some\namespace\interface'  => 'some\namespace\classname'
-     *          )
-     *      then one could use EE_Registry::instance()->create( 'interface_alias' )
-     *      to load an instance of 'some\namespace\classname'
-     *
-     * @param string $alias
-     * @param string $for_class
-     * @return string
-     */
-    public function getFqnForAlias(string $alias = '', string $for_class = ''): string
-    {
-        return $this->class_cache->getFqnForAlias($alias, $for_class);
-    }
-
-
-    /**
-     * Registers the core dependencies and whether a previously instantiated object should be loaded from the cache,
-     * if one exists, or whether a new object should be generated every time the requested class is loaded.
-     * This is done by using the following class constants:
-     *        EE_Dependency_Map::load_from_cache - loads previously instantiated object
-     *        EE_Dependency_Map::load_new_object - generates a new object every time
-     */
-    protected function _register_core_dependencies()
-    {
-        $this->_dependency_map = [
-            'EE_Admin'                                                                                                    => [
-                'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Request_Handler'                                                                                          => [
-                'EventEspresso\core\services\request\Request'  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Response' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_System'                                                                                                   => [
-                'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
-                'EE_Maintenance_Mode'                         => EE_Dependency_Map::load_from_cache,
-                'EE_Registry'                                 => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\routing\Router'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Session'                                                                                                  => [
-                'EventEspresso\core\services\cache\TransientCacheStorage'  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'              => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\session\SessionStartHandler'  => EE_Dependency_Map::load_from_cache,
-                'EE_Encryption'                                            => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Cart'                                                                                                     => [
-                'EE_Session' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Messenger_Collection_Loader'                                                                              => [
-                'EE_Messenger_Collection' => EE_Dependency_Map::load_new_object,
-            ],
-            'EE_Message_Type_Collection_Loader'                                                                           => [
-                'EE_Message_Type_Collection' => EE_Dependency_Map::load_new_object,
-            ],
-            'EE_Message_Resource_Manager'                                                                                 => [
-                'EE_Messenger_Collection_Loader'    => EE_Dependency_Map::load_new_object,
-                'EE_Message_Type_Collection_Loader' => EE_Dependency_Map::load_new_object,
-                'EEM_Message_Template_Group'        => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Message_Factory'                                                                                          => [
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_messages'                                                                                                 => [
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Messages_Generator'                                                                                       => [
-                'EE_Messages_Queue'                    => EE_Dependency_Map::load_new_object,
-                'EE_Messages_Data_Handler_Collection'  => EE_Dependency_Map::load_new_object,
-                'EE_Message_Template_Group_Collection' => EE_Dependency_Map::load_new_object,
-                'EEH_Parse_Shortcodes'                 => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Messages_Processor'                                                                                       => [
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Messages_Queue'                                                                                           => [
-                'EE_Message_Repository' => EE_Dependency_Map::load_new_object,
-            ],
-            'EE_Messages_Template_Defaults'                                                                               => [
-                'EEM_Message_Template_Group' => EE_Dependency_Map::load_from_cache,
-                'EEM_Message_Template'       => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Message_To_Generate_From_Request'                                                                         => [
-                'EE_Message_Resource_Manager'                 => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\CommandBus'                                                             => [
-                'EventEspresso\core\services\commands\CommandHandlerManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\services\commands\CommandHandler'                                                              => [
-                'EE_Registry'         => EE_Dependency_Map::load_from_cache,
-                'CommandBusInterface' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\CommandHandlerManager'                                                  => [
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\CompositeCommandHandler'                                                => [
-                'EventEspresso\core\services\commands\CommandBus'     => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\commands\CommandFactory' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\CommandFactory'                                                         => [
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\middleware\CapChecker'                                                  => [
-                'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker'                                         => [
-                'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\capabilities\RegistrationsCapChecker'                                     => [
-                'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\registration\CreateRegistrationCommandHandler'                          => [
-                'EventEspresso\core\domain\services\registration\CreateRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommandHandler'                     => [
-                'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommandHandler'                    => [
-                'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler'         => [
-                'EventEspresso\core\domain\services\registration\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler' => [
-                'EventEspresso\core\domain\services\registration\UpdateRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommandHandler'                              => [
-                'EventEspresso\core\domain\services\ticket\CreateTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\ticket\CancelTicketLineItemCommandHandler'                              => [
-                'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\registration\CancelRegistrationService'                                   => [
-                'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler'                                  => [
-                'EEM_Attendee' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\database\TableManager'                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Data_Migration_Class_Base'                                                                                => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_1_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_2_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_3_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_4_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_5_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_6_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_7_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_8_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_9_0'                                                                                           => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_10_0'                                                                                          => [
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-                'EE_DMS_Core_4_9_0'                                  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_11_0'                                                                                          => [
-                'EE_DMS_Core_4_10_0'                                 => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_DMS_Core_4_12_0'                                                                                          => [
-                'EE_DMS_Core_4_11_0'                                 => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\assets\I18nRegistry'                                                             => [
-                [],
-                'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\assets\Registry'                                                                 => [
-                'EventEspresso\core\services\assets\AssetCollection' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\assets\AssetManifest'   => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoCancelled'                                             => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoCheckout'                                              => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoEventAttendees'                                        => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoEvents'                                                => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoThankYou'                                              => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoTicketSelector'                                        => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\shortcodes\EspressoTxnPage'                                               => [
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\cache\BasicCacheManager'                                                         => [
-                'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\cache\PostRelatedCacheManager'                                                   => [
-                'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\validation\email\EmailValidationService'                                  => [
-                'EE_Registration_Config'                     => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\values\EmailAddress'                                                               => [
-                null,
-                'EventEspresso\core\domain\services\validation\email\EmailValidationService' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\orm\ModelFieldFactory'                                                           => [
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'LEGACY_MODELS'                                                                                               => [
-                null,
-                'EventEspresso\core\services\database\ModelFieldFactory' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Module_Request_Router'                                                                                    => [
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_Registration_Processor'                                                                                   => [
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\notifications\PersistentAdminNoticeManager'                                      => [
-                null,
-                'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'                         => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\caffeinated\modules\recaptcha_invisible\InvisibleRecaptcha'                                    => [
-                'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
-                'EE_Session'             => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\modules\ticket_selector\DisplayTicketSelector'                                                 => [
-                'EventEspresso\core\domain\entities\users\CurrentUser' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'          => EE_Dependency_Map::load_from_cache,
-                'EE_Ticket_Selector_Config'                            => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\modules\ticket_selector\ProcessTicketSelector'                                                 => [
-                'EE_Core_Config'                                                          => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'                             => EE_Dependency_Map::load_from_cache,
-                'EE_Session'                                                              => EE_Dependency_Map::load_from_cache,
-                'EEM_Ticket'                                                              => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\modules\ticket_selector\TicketDatetimeAvailabilityTracker' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\modules\ticket_selector\TicketDatetimeAvailabilityTracker'                                     => [
-                'EEM_Datetime' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions'                              => [
-                'EE_Core_Config'                             => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'                                => [
-                'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'                               => [
-                'EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_CPT_Strategy'                                                                                             => [
-                'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\loaders\ObjectIdentifier'                                                        => [
-                'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\CPTs\CptQueryModifier'                                                                    => [
-                null,
-                null,
-                null,
-                'EventEspresso\core\services\request\CurrentPage' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'     => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'      => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\dependencies\DependencyResolver'                                                 => [
-                'EventEspresso\core\services\container\Mirror'            => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
-                'EE_Dependency_Map'                                       => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\routing\RouteMatchSpecificationDependencyResolver'                               => [
-                'EventEspresso\core\services\container\Mirror'            => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
-                'EE_Dependency_Map'                                       => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\routing\RouteMatchSpecificationFactory'                                          => [
-                'EventEspresso\core\services\routing\RouteMatchSpecificationDependencyResolver' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'                                    => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\routing\RouteMatchSpecificationManager'                                          => [
-                'EventEspresso\core\services\routing\RouteMatchSpecificationCollection' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\routing\RouteMatchSpecificationFactory'    => EE_Dependency_Map::load_from_cache,
-            ],
-            'EE_URL_Validation_Strategy'                                                                                  => [
-                null,
-                null,
-                'EventEspresso\core\services\validators\URLValidator' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\request\files\FilesDataHandler'                                                  => [
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspressoBatchRequest\BatchRequestProcessor'                                                             => [
-                'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
+	/**
+	 * This means that the requested class dependency is not present in the dependency map
+	 */
+	const not_registered = 0;
+
+	/**
+	 * This instructs class loaders to ALWAYS return a newly instantiated object for the requested class.
+	 */
+	const load_new_object = 1;
+
+	/**
+	 * This instructs class loaders to return a previously instantiated and cached object for the requested class.
+	 * IF a previously instantiated object does not exist, a new one will be created and added to the cache.
+	 */
+	const load_from_cache = 2;
+
+	/**
+	 * When registering a dependency,
+	 * this indicates to keep any existing dependencies that already exist,
+	 * and simply discard any new dependencies declared in the incoming data
+	 */
+	const KEEP_EXISTING_DEPENDENCIES = 0;
+
+	/**
+	 * When registering a dependency,
+	 * this indicates to overwrite any existing dependencies that already exist using the incoming data
+	 */
+	const OVERWRITE_DEPENDENCIES = 1;
+
+	/**
+	 * @type EE_Dependency_Map $_instance
+	 */
+	protected static $_instance;
+
+	/**
+	 * @var ClassInterfaceCache $class_cache
+	 */
+	private $class_cache;
+
+	/**
+	 * @type RequestInterface $request
+	 */
+	protected $request;
+
+	/**
+	 * @type LegacyRequestInterface $legacy_request
+	 */
+	protected $legacy_request;
+
+	/**
+	 * @type ResponseInterface $response
+	 */
+	protected $response;
+
+	/**
+	 * @type LoaderInterface $loader
+	 */
+	protected $loader;
+
+	/**
+	 * @type array $_dependency_map
+	 */
+	protected $_dependency_map = [];
+
+	/**
+	 * @type array $_class_loaders
+	 */
+	protected $_class_loaders = [];
+
+
+	/**
+	 * EE_Dependency_Map constructor.
+	 *
+	 * @param ClassInterfaceCache $class_cache
+	 */
+	protected function __construct(ClassInterfaceCache $class_cache)
+	{
+		$this->class_cache = $class_cache;
+		do_action('EE_Dependency_Map____construct', $this);
+	}
+
+
+	/**
+	 * @return void
+	 * @throws InvalidAliasException
+	 */
+	public function initialize()
+	{
+		$this->_register_core_dependencies();
+		$this->_register_core_class_loaders();
+		$this->_register_core_aliases();
+	}
+
+
+	/**
+	 * @singleton method used to instantiate class object
+	 * @param ClassInterfaceCache|null $class_cache
+	 * @return EE_Dependency_Map
+	 */
+	public static function instance(ClassInterfaceCache $class_cache = null): EE_Dependency_Map
+	{
+		// check if class object is instantiated, and instantiated properly
+		if (
+			! EE_Dependency_Map::$_instance instanceof EE_Dependency_Map
+			&& $class_cache instanceof ClassInterfaceCache
+		) {
+			EE_Dependency_Map::$_instance = new EE_Dependency_Map($class_cache);
+		}
+		return EE_Dependency_Map::$_instance;
+	}
+
+
+	/**
+	 * @param RequestInterface $request
+	 */
+	public function setRequest(RequestInterface $request)
+	{
+		$this->request = $request;
+	}
+
+
+	/**
+	 * @param LegacyRequestInterface $legacy_request
+	 */
+	public function setLegacyRequest(LegacyRequestInterface $legacy_request)
+	{
+		$this->legacy_request = $legacy_request;
+	}
+
+
+	/**
+	 * @param ResponseInterface $response
+	 */
+	public function setResponse(ResponseInterface $response)
+	{
+		$this->response = $response;
+	}
+
+
+	/**
+	 * @param LoaderInterface $loader
+	 */
+	public function setLoader(LoaderInterface $loader)
+	{
+		$this->loader = $loader;
+	}
+
+
+	/**
+	 * @param string $class
+	 * @param array  $dependencies
+	 * @param int    $overwrite
+	 * @return bool
+	 */
+	public static function register_dependencies(
+		string $class,
+		array $dependencies,
+		int $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
+	): bool {
+		return EE_Dependency_Map::$_instance->registerDependencies($class, $dependencies, $overwrite);
+	}
+
+
+	/**
+	 * Assigns an array of class names and corresponding load sources (new or cached)
+	 * to the class specified by the first parameter.
+	 * IMPORTANT !!!
+	 * The order of elements in the incoming $dependencies array MUST match
+	 * the order of the constructor parameters for the class in question.
+	 * This is especially important when overriding any existing dependencies that are registered.
+	 * the third parameter controls whether any duplicate dependencies are overwritten or not.
+	 *
+	 * @param string $class
+	 * @param array  $dependencies
+	 * @param int    $overwrite
+	 * @return bool
+	 */
+	public function registerDependencies(
+		string $class,
+		array $dependencies,
+		int $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
+	): bool {
+		$class      = trim($class, '\\');
+		$registered = false;
+		if (empty(EE_Dependency_Map::$_instance->_dependency_map[ $class ])) {
+			EE_Dependency_Map::$_instance->_dependency_map[ $class ] = [];
+		}
+		// we need to make sure that any aliases used when registering a dependency
+		// get resolved to the correct class name
+		foreach ($dependencies as $dependency => $load_source) {
+			$alias = EE_Dependency_Map::$_instance->getFqnForAlias($dependency);
+			if (
+				$overwrite === EE_Dependency_Map::OVERWRITE_DEPENDENCIES
+				|| ! isset(EE_Dependency_Map::$_instance->_dependency_map[ $class ][ $alias ])
+			) {
+				unset($dependencies[ $dependency ]);
+				$dependencies[ $alias ] = $load_source;
+				$registered             = true;
+			}
+		}
+		// now add our two lists of dependencies together.
+		// using Union (+=) favours the arrays in precedence from left to right,
+		// so $dependencies is NOT overwritten because it is listed first
+		// ie: with A = B + C, entries in B take precedence over duplicate entries in C
+		// Union is way faster than array_merge() but should be used with caution...
+		// especially with numerically indexed arrays
+		$dependencies += EE_Dependency_Map::$_instance->_dependency_map[ $class ];
+		// now we need to ensure that the resulting dependencies
+		// array only has the entries that are required for the class
+		// so first count how many dependencies were originally registered for the class
+		$dependency_count = count(EE_Dependency_Map::$_instance->_dependency_map[ $class ]);
+		// if that count is non-zero (meaning dependencies were already registered)
+		EE_Dependency_Map::$_instance->_dependency_map[ $class ] = $dependency_count
+			// then truncate the  final array to match that count
+			? array_slice($dependencies, 0, $dependency_count)
+			// otherwise just take the incoming array because nothing previously existed
+			: $dependencies;
+		return $registered;
+	}
+
+
+	/**
+	 * @param string          $class_name
+	 * @param callable|string $loader
+	 * @param bool            $overwrite
+	 * @return bool
+	 * @throws DomainException
+	 */
+	public static function register_class_loader(
+		string $class_name,
+		$loader = 'load_core',
+		bool $overwrite = false
+	): bool {
+		return EE_Dependency_Map::$_instance->registerClassLoader($class_name, $loader, $overwrite);
+	}
+
+
+	/**
+	 * @param string $class_name
+	 * @param Closure|string $loader
+	 * @param bool   $overwrite
+	 * @return bool
+	 * @throws DomainException
+	 */
+	public function registerClassLoader(string $class_name, $loader = 'load_core', bool $overwrite = false): bool
+	{
+		if (! $loader instanceof Closure && strpos($class_name, '\\') !== false) {
+			throw new DomainException(
+				esc_html__('Don\'t use class loaders for FQCNs.', 'event_espresso')
+			);
+		}
+		// check that loader is callable or method starts with "load_" and exists in EE_Registry
+		if (
+			! is_callable($loader)
+			&& (
+				strpos($loader, 'load_') !== 0
+				|| ! method_exists('EE_Registry', $loader)
+			)
+		) {
+			throw new DomainException(
+				sprintf(
+					esc_html__(
+						'"%1$s" is not a valid loader method on EE_Registry.',
+						'event_espresso'
+					),
+					$loader
+				)
+			);
+		}
+		$class_name = EE_Dependency_Map::$_instance->getFqnForAlias($class_name);
+		if ($overwrite || ! isset(EE_Dependency_Map::$_instance->_class_loaders[ $class_name ])) {
+			EE_Dependency_Map::$_instance->_class_loaders[ $class_name ] = $loader;
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function dependency_map(): array
+	{
+		return $this->_dependency_map;
+	}
+
+
+	/**
+	 * returns TRUE if dependency map contains a listing for the provided class name
+	 *
+	 * @param string $class_name
+	 * @return boolean
+	 */
+	public function has(string $class_name = ''): bool
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		return isset($this->_dependency_map[ $class_name ]);
+	}
+
+
+	/**
+	 * returns TRUE if dependency map contains a listing for the provided class name AND dependency
+	 *
+	 * @param string $class_name
+	 * @param string $dependency
+	 * @return bool
+	 */
+	public function has_dependency_for_class(string $class_name = '', string $dependency = ''): bool
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		$dependency = $this->getFqnForAlias($dependency, $class_name);
+		return isset($this->_dependency_map[ $class_name ][ $dependency ]);
+	}
+
+
+	/**
+	 * returns loading strategy for whether a previously cached dependency should be loaded or a new instance returned
+	 *
+	 * @param string $class_name
+	 * @param string $dependency
+	 * @return int
+	 */
+	public function loading_strategy_for_class_dependency(string $class_name = '', string $dependency = ''): int
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		$dependency = $this->getFqnForAlias($dependency);
+		return $this->has_dependency_for_class($class_name, $dependency)
+			? $this->_dependency_map[ $class_name ][ $dependency ]
+			: EE_Dependency_Map::not_registered;
+	}
+
+
+	/**
+	 * @param string $class_name
+	 * @return string | Closure
+	 */
+	public function class_loader(string $class_name)
+	{
+		// all legacy models use load_model()
+		if (strpos($class_name, 'EEM_') === 0) {
+			return 'load_model';
+		}
+		// EE_CPT_*_Strategy classes like EE_CPT_Event_Strategy, EE_CPT_Venue_Strategy, etc
+		// perform strpos() first to avoid loading regex every time we load a class
+		if (
+			strpos($class_name, 'EE_CPT_') === 0
+			&& preg_match('/^EE_CPT_([a-zA-Z]+)_Strategy$/', $class_name)
+		) {
+			return 'load_core';
+		}
+		$class_name = $this->getFqnForAlias($class_name);
+		return $this->_class_loaders[ $class_name ] ?? '';
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function class_loaders(): array
+	{
+		return $this->_class_loaders;
+	}
+
+
+	/**
+	 * adds an alias for a classname
+	 *
+	 * @param string $fqcn      the class name that should be used (concrete class to replace interface)
+	 * @param string $alias     the class name that would be type hinted for (abstract parent or interface)
+	 * @param string $for_class the class that has the dependency (is type hinting for the interface)
+	 * @throws InvalidAliasException
+	 */
+	public function add_alias(string $fqcn, string $alias, string $for_class = '')
+	{
+		$this->class_cache->addAlias($fqcn, $alias, $for_class);
+	}
+
+
+	/**
+	 * Returns TRUE if the provided fully qualified name IS an alias
+	 * WHY?
+	 * Because if a class is type hinting for a concretion,
+	 * then why would we need to find another class to supply it?
+	 * ie: if a class asks for `Fully/Qualified/Namespace/SpecificClassName`,
+	 * then give it an instance of `Fully/Qualified/Namespace/SpecificClassName`.
+	 * Don't go looking for some substitute.
+	 * Whereas if a class is type hinting for an interface...
+	 * then we need to find an actual class to use.
+	 * So the interface IS the alias for some other FQN,
+	 * and we need to find out if `Fully/Qualified/Namespace/SomeInterface`
+	 * represents some other class.
+	 *
+	 * @param string $fqn
+	 * @param string $for_class
+	 * @return bool
+	 */
+	public function isAlias(string $fqn = '', string $for_class = ''): bool
+	{
+		return $this->class_cache->isAlias($fqn, $for_class);
+	}
+
+
+	/**
+	 * Returns a FQN for provided alias if one exists, otherwise returns the original $alias
+	 * functions recursively, so that multiple aliases can be used to drill down to a FQN
+	 *  for example:
+	 *      if the following two entries were added to the _aliases array:
+	 *          array(
+	 *              'interface_alias'           => 'some\namespace\interface'
+	 *              'some\namespace\interface'  => 'some\namespace\classname'
+	 *          )
+	 *      then one could use EE_Registry::instance()->create( 'interface_alias' )
+	 *      to load an instance of 'some\namespace\classname'
+	 *
+	 * @param string $alias
+	 * @param string $for_class
+	 * @return string
+	 */
+	public function getFqnForAlias(string $alias = '', string $for_class = ''): string
+	{
+		return $this->class_cache->getFqnForAlias($alias, $for_class);
+	}
+
+
+	/**
+	 * Registers the core dependencies and whether a previously instantiated object should be loaded from the cache,
+	 * if one exists, or whether a new object should be generated every time the requested class is loaded.
+	 * This is done by using the following class constants:
+	 *        EE_Dependency_Map::load_from_cache - loads previously instantiated object
+	 *        EE_Dependency_Map::load_new_object - generates a new object every time
+	 */
+	protected function _register_core_dependencies()
+	{
+		$this->_dependency_map = [
+			'EE_Admin'                                                                                                    => [
+				'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
 				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\converters\RestApiSpoofer'                                                => [
-                'WP_REST_Server'                                               => EE_Dependency_Map::load_from_cache,
-                'EED_Core_Rest_Api'                                            => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\libraries\rest_api\controllers\model\Read' => EE_Dependency_Map::load_from_cache,
-                null,
-            ],
-            'EventEspresso\core\services\routing\RouteHandler'                                                            => [
-                'EventEspresso\core\services\json\JsonDataNodeHandler' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'           => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'          => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\routing\RouteCollection'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\json\JsonDataNodeHandler'                                                        => [
-                'EventEspresso\core\services\json\JsonDataNodeValidator' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\routing\Router'                                                                  => [
-                'EE_Dependency_Map'                                => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'       => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\routing\RouteHandler' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\assets\AssetManifest'                                                            => [
-                'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\assets\AssetManifestFactory'                                                     => [
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\assets\BaristaFactory'                                                           => [
-                'EventEspresso\core\services\assets\AssetManifestFactory' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\capabilities\FeatureFlags'                                                => [
-                'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\addon\AddonManager'                                                              => [
-                'EventEspresso\core\services\addon\AddonCollection'              => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\Psr4Autoloader'                              => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\addon\api\v1\RegisterAddon'         => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\addon\api\IncompatibleAddonHandler' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\addon\api\ThirdPartyPluginHandler'  => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\addon\api\ThirdPartyPluginHandler'                                               => [
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspressoBatchRequest\JobHandlers\ExecuteBatchDeletion'                                                  => [
-                'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspressoBatchRequest\JobHandlers\PreviewEventDeletion'                                                  => [
-                'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\admin\events\data\PreviewDeletion'                                        => [
-                'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
-                'EEM_Event'                                                   => EE_Dependency_Map::load_from_cache,
-                'EEM_Datetime'                                                => EE_Dependency_Map::load_from_cache,
-                'EEM_Registration'                                            => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\admin\events\data\ConfirmDeletion'                                        => [
-                'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\request\CurrentPage'                                                             => [
-                'EE_CPT_Strategy'                             => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\shortcodes\LegacyShortcodesManager'                                              => [
-                'EE_Registry'                                     => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\CurrentPage' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\shortcodes\ShortcodesManager'                                                    => [
-                'EventEspresso\core\services\shortcodes\LegacyShortcodesManager' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\CurrentPage'                => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\entities\users\CurrentUser'                                                        => [
-                'EventEspresso\core\domain\entities\users\EventManagers' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\form\meta\InputTypes'                                                            => [
-                'EventEspresso\core\services\form\meta\inputs\Block'    => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Button'   => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\DateTime' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Input'    => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Number'   => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Phone'    => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Select'   => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\form\meta\inputs\Text'     => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\domain\services\registration\form\v1\RegFormDependencyHandler'                            => [
-                'EE_Dependency_Map' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\calculators\LineItemCalculator'                                                  => [
-                'EventEspresso\core\services\helpers\DecimalValues' => EE_Dependency_Map::load_from_cache,
-            ],
-            'EventEspresso\core\services\helpers\DecimalValues'                                                           => [
-                'EE_Currency_Config' => EE_Dependency_Map::load_from_cache,
-            ],
-        ];
-    }
-
-
-    /**
-     * Registers how core classes are loaded.
-     * This can either be done by simply providing the name of one of the EE_Registry loader methods such as:
-     *        'EE_Request_Handler' => 'load_core'
-     *        'EE_Messages_Queue'  => 'load_lib'
-     *        'EEH_Debug_Tools'    => 'load_helper'
-     * or, if greater control is required, by providing a custom closure. For example:
-     *        'Some_Class' => function () {
-     *            return new Some_Class();
-     *        },
-     * This is required for instantiating dependencies
-     * where an interface has been type hinted in a class constructor. For example:
-     *        'Required_Interface' => function () {
-     *            return new A_Class_That_Implements_Required_Interface();
-     *        },
-     */
-    protected function _register_core_class_loaders()
-    {
-        $this->_class_loaders = [
-            // load_core
-            'EE_Dependency_Map'                            => function () {
-                return $this;
-            },
-            'EE_Capabilities'                              => 'load_core',
-            'EE_Encryption'                                => 'load_core',
-            'EE_Front_Controller'                          => 'load_core',
-            'EE_Module_Request_Router'                     => 'load_core',
-            'EE_Registry'                                  => 'load_core',
-            'EE_Request'                                   => function () {
-                return $this->legacy_request;
-            },
-            'EventEspresso\core\services\request\Request'  => function () {
-                return $this->request;
-            },
-            'EventEspresso\core\services\request\Response' => function () {
-                return $this->response;
-            },
-            'EE_Base'                                      => 'load_core',
-            'EE_Request_Handler'                           => 'load_core',
-            'EE_Session'                                   => 'load_core',
-            'EE_Cron_Tasks'                                => 'load_core',
-            'EE_System'                                    => 'load_core',
-            'EE_Maintenance_Mode'                          => 'load_core',
-            'EE_Register_CPTs'                             => 'load_core',
-            'EE_Admin'                                     => 'load_core',
-            'EE_CPT_Strategy'                              => 'load_core',
-            // load_class
-            'EE_Registration_Processor'                    => 'load_class',
-            // load_lib
-            'EE_Message_Resource_Manager'                  => 'load_lib',
-            'EE_Message_Type_Collection'                   => 'load_lib',
-            'EE_Message_Type_Collection_Loader'            => 'load_lib',
-            'EE_Messenger_Collection'                      => 'load_lib',
-            'EE_Messenger_Collection_Loader'               => 'load_lib',
-            'EE_Messages_Processor'                        => 'load_lib',
-            'EE_Message_Repository'                        => 'load_lib',
-            'EE_Messages_Queue'                            => 'load_lib',
-            'EE_Messages_Data_Handler_Collection'          => 'load_lib',
-            'EE_Message_Template_Group_Collection'         => 'load_lib',
-            'EE_Payment_Method_Manager'                    => 'load_lib',
-            'EE_DMS_Core_4_1_0'                            => 'load_dms',
-            'EE_DMS_Core_4_2_0'                            => 'load_dms',
-            'EE_DMS_Core_4_3_0'                            => 'load_dms',
-            'EE_DMS_Core_4_5_0'                            => 'load_dms',
-            'EE_DMS_Core_4_6_0'                            => 'load_dms',
-            'EE_DMS_Core_4_7_0'                            => 'load_dms',
-            'EE_DMS_Core_4_8_0'                            => 'load_dms',
-            'EE_DMS_Core_4_9_0'                            => 'load_dms',
-            'EE_DMS_Core_4_10_0'                           => 'load_dms',
-            'EE_DMS_Core_4_11_0'                           => 'load_dms',
-            'EE_DMS_Core_4_12_0'                           => 'load_dms',
-            'EE_Messages_Generator'                        => static function () {
-                return EE_Registry::instance()->load_lib(
-                    'Messages_Generator',
-                    [],
-                    false,
-                    false
-                );
-            },
-            'EE_Messages_Template_Defaults'                => static function ($arguments = []) {
-                return EE_Registry::instance()->load_lib(
-                    'Messages_Template_Defaults',
-                    $arguments,
-                    false,
-                    false
-                );
-            },
-            // load_helper
-            'EEH_Parse_Shortcodes'                         => static function () {
-                if (EE_Registry::instance()->load_helper('Parse_Shortcodes')) {
-                    return new EEH_Parse_Shortcodes();
-                }
-                return null;
-            },
-            'EE_Template_Config'                           => static function () {
-                return EE_Config::instance()->template_settings;
-            },
-            'EE_Currency_Config'                           => static function () {
-                return EE_Currency_Config::getCurrencyConfig();
-            },
-            'EE_Registration_Config'                       => static function () {
-                return EE_Config::instance()->registration;
-            },
-            'EE_Core_Config'                               => static function () {
-                return EE_Config::instance()->core;
-            },
-            'EventEspresso\core\services\loaders\Loader'   => static function () {
-                return LoaderFactory::getLoader();
-            },
-            'EE_Network_Config'                            => static function () {
-                return EE_Network_Config::instance();
-            },
-            'EE_Config'                                    => static function () {
-                return EE_Config::instance();
-            },
-            'EventEspresso\core\domain\Domain'             => static function () {
-                return DomainFactory::getEventEspressoCoreDomain();
-            },
-            'EE_Admin_Config'                              => static function () {
-                return EE_Config::instance()->admin;
-            },
-            'EE_Organization_Config'                       => static function () {
-                return EE_Config::instance()->organization;
-            },
-            'EE_Network_Core_Config'                       => static function () {
-                return EE_Network_Config::instance()->core;
-            },
-            'EE_Environment_Config'                        => static function () {
-                return EE_Config::instance()->environment;
-            },
-            'EED_Core_Rest_Api'                            => static function () {
-                return EED_Core_Rest_Api::instance();
-            },
-            'WP_REST_Server'                               => static function () {
-                return rest_get_server();
-            },
-            'EventEspresso\core\Psr4Autoloader'            => static function () {
-                return EE_Psr4AutoloaderInit::psr4_loader();
-            },
-            'EE_Ticket_Selector_Config'                    => function () {
-                return EE_Config::instance()->template_settings->EED_Ticket_Selector;
-            },
-        ];
-    }
-
-
-    /**
-     * can be used for supplying alternate names for classes,
-     * or for connecting interface names to instantiable classes
-     *
-     * @throws InvalidAliasException
-     */
-    protected function _register_core_aliases()
-    {
-        $aliases = [
-            'CommandBusInterface'                                                          => 'EventEspresso\core\services\commands\CommandBusInterface',
-            'EventEspresso\core\services\commands\CommandBusInterface'                     => 'EventEspresso\core\services\commands\CommandBus',
-            'CommandHandlerManagerInterface'                                               => 'EventEspresso\core\services\commands\CommandHandlerManagerInterface',
-            'EventEspresso\core\services\commands\CommandHandlerManagerInterface'          => 'EventEspresso\core\services\commands\CommandHandlerManager',
-            'CapChecker'                                                                   => 'EventEspresso\core\services\commands\middleware\CapChecker',
-            'AddActionHook'                                                                => 'EventEspresso\core\services\commands\middleware\AddActionHook',
-            'CapabilitiesChecker'                                                          => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
-            'CapabilitiesCheckerInterface'                                                 => 'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface',
-            'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface' => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
-            'CreateRegistrationService'                                                    => 'EventEspresso\core\domain\services\registration\CreateRegistrationService',
-            'CreateRegistrationCommandHandler'                                             => 'EventEspresso\core\services\commands\registration\CreateRegistrationCommand',
-            'CopyRegistrationDetailsCommandHandler'                                        => 'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommand',
-            'CopyRegistrationPaymentsCommandHandler'                                       => 'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommand',
-            'CancelRegistrationAndTicketLineItemCommandHandler'                            => 'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler',
-            'UpdateRegistrationAndTransactionAfterChangeCommandHandler'                    => 'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler',
-            'CreateTicketLineItemCommandHandler'                                           => 'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommand',
-            'CreateTransactionCommandHandler'                                              => 'EventEspresso\core\services\commands\transaction\CreateTransactionCommandHandler',
-            'CreateAttendeeCommandHandler'                                                 => 'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler',
-            'TableManager'                                                                 => 'EventEspresso\core\services\database\TableManager',
-            'TableAnalysis'                                                                => 'EventEspresso\core\services\database\TableAnalysis',
-            'EspressoShortcode'                                                            => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
-            'ShortcodeInterface'                                                           => 'EventEspresso\core\services\shortcodes\ShortcodeInterface',
-            'EventEspresso\core\services\shortcodes\ShortcodeInterface'                    => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
-            'EventEspresso\core\services\cache\CacheStorageInterface'                      => 'EventEspresso\core\services\cache\TransientCacheStorage',
-            'LoaderInterface'                                                              => 'EventEspresso\core\services\loaders\LoaderInterface',
-            'EventEspresso\core\services\loaders\LoaderInterface'                          => 'EventEspresso\core\services\loaders\Loader',
-            'CommandFactoryInterface'                                                      => 'EventEspresso\core\services\commands\CommandFactoryInterface',
-            'EventEspresso\core\services\commands\CommandFactoryInterface'                 => 'EventEspresso\core\services\commands\CommandFactory',
-            'EmailValidatorInterface'                                                      => 'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface',
-            'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface'  => 'EventEspresso\core\domain\services\validation\email\EmailValidationService',
-            'NoticeConverterInterface'                                                     => 'EventEspresso\core\services\notices\NoticeConverterInterface',
-            'EventEspresso\core\services\notices\NoticeConverterInterface'                 => 'EventEspresso\core\services\notices\ConvertNoticesToEeErrors',
-            'NoticesContainerInterface'                                                    => 'EventEspresso\core\services\notices\NoticesContainerInterface',
-            'EventEspresso\core\services\notices\NoticesContainerInterface'                => 'EventEspresso\core\services\notices\NoticesContainer',
-            'EventEspresso\core\services\request\RequestInterface'                         => 'EventEspresso\core\services\request\Request',
-            'EventEspresso\core\services\request\ResponseInterface'                        => 'EventEspresso\core\services\request\Response',
-            'EventEspresso\core\domain\DomainInterface'                                    => 'EventEspresso\core\domain\Domain',
-            'Registration_Processor'                                                       => 'EE_Registration_Processor',
-            'EventEspresso\core\services\assets\AssetManifestInterface'                    => 'EventEspresso\core\services\assets\AssetManifest',
-        ];
-        foreach ($aliases as $alias => $fqn) {
-            if (is_array($fqn)) {
-                foreach ($fqn as $class => $for_class) {
-                    $this->class_cache->addAlias($class, $alias, $for_class);
-                }
-                continue;
-            }
-            $this->class_cache->addAlias($fqn, $alias);
-        }
-        if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
-            $this->class_cache->addAlias(
-                'EventEspresso\core\services\notices\ConvertNoticesToAdminNotices',
-                'EventEspresso\core\services\notices\NoticeConverterInterface'
-            );
-        }
-    }
-
-
-    public function debug($for_class = '')
-    {
-        if (method_exists($this->class_cache, 'debug')) {
-            $this->class_cache->debug($for_class);
-        }
-    }
-
-
-    /**
-     * This is used to reset the internal map and class_loaders to their original default state at the beginning of the
-     * request Primarily used by unit tests.
-     */
-    public function reset()
-    {
-        $this->_register_core_class_loaders();
-        $this->_register_core_dependencies();
-    }
-
-
-    /**
-     * PLZ NOTE: a better name for this method would be is_alias()
-     * because it returns TRUE if the provided fully qualified name IS an alias
-     * WHY?
-     * Because if a class is type hinting for a concretion,
-     * then why would we need to find another class to supply it?
-     * ie: if a class asks for `Fully/Qualified/Namespace/SpecificClassName`,
-     * then give it an instance of `Fully/Qualified/Namespace/SpecificClassName`.
-     * Don't go looking for some substitute.
-     * Whereas if a class is type hinting for an interface...
-     * then we need to find an actual class to use.
-     * So the interface IS the alias for some other FQN,
-     * and we need to find out if `Fully/Qualified/Namespace/SomeInterface`
-     * represents some other class.
-     *
-     * @param string $fqn
-     * @param string $for_class
-     * @return bool
-     * @deprecated 4.9.62.p
-     */
-    public function has_alias(string $fqn = '', string $for_class = ''): bool
-    {
-        return $this->isAlias($fqn, $for_class);
-    }
-
-
-    /**
-     * PLZ NOTE: a better name for this method would be get_fqn_for_alias()
-     * because it returns a FQN for provided alias if one exists, otherwise returns the original $alias
-     * functions recursively, so that multiple aliases can be used to drill down to a FQN
-     *  for example:
-     *      if the following two entries were added to the _aliases array:
-     *          array(
-     *              'interface_alias'           => 'some\namespace\interface'
-     *              'some\namespace\interface'  => 'some\namespace\classname'
-     *          )
-     *      then one could use EE_Registry::instance()->create( 'interface_alias' )
-     *      to load an instance of 'some\namespace\classname'
-     *
-     * @param string $alias
-     * @param string $for_class
-     * @return string
-     * @deprecated 4.9.62.p
-     */
-    public function get_alias(string $alias = '', string $for_class = ''): string
-    {
-        return $this->getFqnForAlias($alias, $for_class);
-    }
+			],
+			'EE_Request_Handler'                                                                                          => [
+				'EventEspresso\core\services\request\Request'  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Response' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_System'                                                                                                   => [
+				'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
+				'EE_Maintenance_Mode'                         => EE_Dependency_Map::load_from_cache,
+				'EE_Registry'                                 => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\routing\Router'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Session'                                                                                                  => [
+				'EventEspresso\core\services\cache\TransientCacheStorage'  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'              => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\session\SessionStartHandler'  => EE_Dependency_Map::load_from_cache,
+				'EE_Encryption'                                            => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Cart'                                                                                                     => [
+				'EE_Session' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Messenger_Collection_Loader'                                                                              => [
+				'EE_Messenger_Collection' => EE_Dependency_Map::load_new_object,
+			],
+			'EE_Message_Type_Collection_Loader'                                                                           => [
+				'EE_Message_Type_Collection' => EE_Dependency_Map::load_new_object,
+			],
+			'EE_Message_Resource_Manager'                                                                                 => [
+				'EE_Messenger_Collection_Loader'    => EE_Dependency_Map::load_new_object,
+				'EE_Message_Type_Collection_Loader' => EE_Dependency_Map::load_new_object,
+				'EEM_Message_Template_Group'        => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Message_Factory'                                                                                          => [
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_messages'                                                                                                 => [
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Messages_Generator'                                                                                       => [
+				'EE_Messages_Queue'                    => EE_Dependency_Map::load_new_object,
+				'EE_Messages_Data_Handler_Collection'  => EE_Dependency_Map::load_new_object,
+				'EE_Message_Template_Group_Collection' => EE_Dependency_Map::load_new_object,
+				'EEH_Parse_Shortcodes'                 => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Messages_Processor'                                                                                       => [
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Messages_Queue'                                                                                           => [
+				'EE_Message_Repository' => EE_Dependency_Map::load_new_object,
+			],
+			'EE_Messages_Template_Defaults'                                                                               => [
+				'EEM_Message_Template_Group' => EE_Dependency_Map::load_from_cache,
+				'EEM_Message_Template'       => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Message_To_Generate_From_Request'                                                                         => [
+				'EE_Message_Resource_Manager'                 => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\CommandBus'                                                             => [
+				'EventEspresso\core\services\commands\CommandHandlerManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\services\commands\CommandHandler'                                                              => [
+				'EE_Registry'         => EE_Dependency_Map::load_from_cache,
+				'CommandBusInterface' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\CommandHandlerManager'                                                  => [
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\CompositeCommandHandler'                                                => [
+				'EventEspresso\core\services\commands\CommandBus'     => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\commands\CommandFactory' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\CommandFactory'                                                         => [
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\middleware\CapChecker'                                                  => [
+				'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker'                                         => [
+				'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\capabilities\RegistrationsCapChecker'                                     => [
+				'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\registration\CreateRegistrationCommandHandler'                          => [
+				'EventEspresso\core\domain\services\registration\CreateRegistrationService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommandHandler'                     => [
+				'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommandHandler'                    => [
+				'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler'         => [
+				'EventEspresso\core\domain\services\registration\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler' => [
+				'EventEspresso\core\domain\services\registration\UpdateRegistrationService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommandHandler'                              => [
+				'EventEspresso\core\domain\services\ticket\CreateTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\ticket\CancelTicketLineItemCommandHandler'                              => [
+				'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\registration\CancelRegistrationService'                                   => [
+				'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler'                                  => [
+				'EEM_Attendee' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\database\TableManager'                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Data_Migration_Class_Base'                                                                                => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_1_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_2_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_3_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_4_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_5_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_6_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_7_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_8_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_9_0'                                                                                           => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_10_0'                                                                                          => [
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+				'EE_DMS_Core_4_9_0'                                  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_11_0'                                                                                          => [
+				'EE_DMS_Core_4_10_0'                                 => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_DMS_Core_4_12_0'                                                                                          => [
+				'EE_DMS_Core_4_11_0'                                 => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\assets\I18nRegistry'                                                             => [
+				[],
+				'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\assets\Registry'                                                                 => [
+				'EventEspresso\core\services\assets\AssetCollection' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\assets\AssetManifest'   => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoCancelled'                                             => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoCheckout'                                              => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoEventAttendees'                                        => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoEvents'                                                => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoThankYou'                                              => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoTicketSelector'                                        => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\shortcodes\EspressoTxnPage'                                               => [
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\cache\BasicCacheManager'                                                         => [
+				'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\cache\PostRelatedCacheManager'                                                   => [
+				'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\validation\email\EmailValidationService'                                  => [
+				'EE_Registration_Config'                     => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\values\EmailAddress'                                                               => [
+				null,
+				'EventEspresso\core\domain\services\validation\email\EmailValidationService' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\orm\ModelFieldFactory'                                                           => [
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'LEGACY_MODELS'                                                                                               => [
+				null,
+				'EventEspresso\core\services\database\ModelFieldFactory' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Module_Request_Router'                                                                                    => [
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_Registration_Processor'                                                                                   => [
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\notifications\PersistentAdminNoticeManager'                                      => [
+				null,
+				'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'                         => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\caffeinated\modules\recaptcha_invisible\InvisibleRecaptcha'                                    => [
+				'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
+				'EE_Session'             => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\modules\ticket_selector\DisplayTicketSelector'                                                 => [
+				'EventEspresso\core\domain\entities\users\CurrentUser' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'          => EE_Dependency_Map::load_from_cache,
+				'EE_Ticket_Selector_Config'                            => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\modules\ticket_selector\ProcessTicketSelector'                                                 => [
+				'EE_Core_Config'                                                          => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'                             => EE_Dependency_Map::load_from_cache,
+				'EE_Session'                                                              => EE_Dependency_Map::load_from_cache,
+				'EEM_Ticket'                                                              => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\modules\ticket_selector\TicketDatetimeAvailabilityTracker' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\modules\ticket_selector\TicketDatetimeAvailabilityTracker'                                     => [
+				'EEM_Datetime' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions'                              => [
+				'EE_Core_Config'                             => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'                                => [
+				'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'                               => [
+				'EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions' => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_CPT_Strategy'                                                                                             => [
+				'EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\loaders\ObjectIdentifier'                                                        => [
+				'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\CPTs\CptQueryModifier'                                                                    => [
+				null,
+				null,
+				null,
+				'EventEspresso\core\services\request\CurrentPage' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'     => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'      => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\dependencies\DependencyResolver'                                                 => [
+				'EventEspresso\core\services\container\Mirror'            => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
+				'EE_Dependency_Map'                                       => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\routing\RouteMatchSpecificationDependencyResolver'                               => [
+				'EventEspresso\core\services\container\Mirror'            => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
+				'EE_Dependency_Map'                                       => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\routing\RouteMatchSpecificationFactory'                                          => [
+				'EventEspresso\core\services\routing\RouteMatchSpecificationDependencyResolver' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'                                    => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\routing\RouteMatchSpecificationManager'                                          => [
+				'EventEspresso\core\services\routing\RouteMatchSpecificationCollection' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\routing\RouteMatchSpecificationFactory'    => EE_Dependency_Map::load_from_cache,
+			],
+			'EE_URL_Validation_Strategy'                                                                                  => [
+				null,
+				null,
+				'EventEspresso\core\services\validators\URLValidator' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\request\files\FilesDataHandler'                                                  => [
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspressoBatchRequest\BatchRequestProcessor'                                                             => [
+				'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\converters\RestApiSpoofer'                                                => [
+				'WP_REST_Server'                                               => EE_Dependency_Map::load_from_cache,
+				'EED_Core_Rest_Api'                                            => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\libraries\rest_api\controllers\model\Read' => EE_Dependency_Map::load_from_cache,
+				null,
+			],
+			'EventEspresso\core\services\routing\RouteHandler'                                                            => [
+				'EventEspresso\core\services\json\JsonDataNodeHandler' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'           => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'          => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\routing\RouteCollection'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\json\JsonDataNodeHandler'                                                        => [
+				'EventEspresso\core\services\json\JsonDataNodeValidator' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\routing\Router'                                                                  => [
+				'EE_Dependency_Map'                                => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'       => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\routing\RouteHandler' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\assets\AssetManifest'                                                            => [
+				'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\assets\AssetManifestFactory'                                                     => [
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\assets\BaristaFactory'                                                           => [
+				'EventEspresso\core\services\assets\AssetManifestFactory' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\capabilities\FeatureFlags'                                                => [
+				'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\addon\AddonManager'                                                              => [
+				'EventEspresso\core\services\addon\AddonCollection'              => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\Psr4Autoloader'                              => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\addon\api\v1\RegisterAddon'         => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\addon\api\IncompatibleAddonHandler' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\addon\api\ThirdPartyPluginHandler'  => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\addon\api\ThirdPartyPluginHandler'                                               => [
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspressoBatchRequest\JobHandlers\ExecuteBatchDeletion'                                                  => [
+				'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspressoBatchRequest\JobHandlers\PreviewEventDeletion'                                                  => [
+				'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\admin\events\data\PreviewDeletion'                                        => [
+				'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
+				'EEM_Event'                                                   => EE_Dependency_Map::load_from_cache,
+				'EEM_Datetime'                                                => EE_Dependency_Map::load_from_cache,
+				'EEM_Registration'                                            => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\admin\events\data\ConfirmDeletion'                                        => [
+				'EventEspresso\core\services\orm\tree_traversal\NodeGroupDao' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\request\CurrentPage'                                                             => [
+				'EE_CPT_Strategy'                             => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\shortcodes\LegacyShortcodesManager'                                              => [
+				'EE_Registry'                                     => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\CurrentPage' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\shortcodes\ShortcodesManager'                                                    => [
+				'EventEspresso\core\services\shortcodes\LegacyShortcodesManager' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\CurrentPage'                => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\entities\users\CurrentUser'                                                        => [
+				'EventEspresso\core\domain\entities\users\EventManagers' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\form\meta\InputTypes'                                                            => [
+				'EventEspresso\core\services\form\meta\inputs\Block'    => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Button'   => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\DateTime' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Input'    => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Number'   => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Phone'    => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Select'   => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\form\meta\inputs\Text'     => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\domain\services\registration\form\v1\RegFormDependencyHandler'                            => [
+				'EE_Dependency_Map' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\calculators\LineItemCalculator'                                                  => [
+				'EventEspresso\core\services\helpers\DecimalValues' => EE_Dependency_Map::load_from_cache,
+			],
+			'EventEspresso\core\services\helpers\DecimalValues'                                                           => [
+				'EE_Currency_Config' => EE_Dependency_Map::load_from_cache,
+			],
+		];
+	}
+
+
+	/**
+	 * Registers how core classes are loaded.
+	 * This can either be done by simply providing the name of one of the EE_Registry loader methods such as:
+	 *        'EE_Request_Handler' => 'load_core'
+	 *        'EE_Messages_Queue'  => 'load_lib'
+	 *        'EEH_Debug_Tools'    => 'load_helper'
+	 * or, if greater control is required, by providing a custom closure. For example:
+	 *        'Some_Class' => function () {
+	 *            return new Some_Class();
+	 *        },
+	 * This is required for instantiating dependencies
+	 * where an interface has been type hinted in a class constructor. For example:
+	 *        'Required_Interface' => function () {
+	 *            return new A_Class_That_Implements_Required_Interface();
+	 *        },
+	 */
+	protected function _register_core_class_loaders()
+	{
+		$this->_class_loaders = [
+			// load_core
+			'EE_Dependency_Map'                            => function () {
+				return $this;
+			},
+			'EE_Capabilities'                              => 'load_core',
+			'EE_Encryption'                                => 'load_core',
+			'EE_Front_Controller'                          => 'load_core',
+			'EE_Module_Request_Router'                     => 'load_core',
+			'EE_Registry'                                  => 'load_core',
+			'EE_Request'                                   => function () {
+				return $this->legacy_request;
+			},
+			'EventEspresso\core\services\request\Request'  => function () {
+				return $this->request;
+			},
+			'EventEspresso\core\services\request\Response' => function () {
+				return $this->response;
+			},
+			'EE_Base'                                      => 'load_core',
+			'EE_Request_Handler'                           => 'load_core',
+			'EE_Session'                                   => 'load_core',
+			'EE_Cron_Tasks'                                => 'load_core',
+			'EE_System'                                    => 'load_core',
+			'EE_Maintenance_Mode'                          => 'load_core',
+			'EE_Register_CPTs'                             => 'load_core',
+			'EE_Admin'                                     => 'load_core',
+			'EE_CPT_Strategy'                              => 'load_core',
+			// load_class
+			'EE_Registration_Processor'                    => 'load_class',
+			// load_lib
+			'EE_Message_Resource_Manager'                  => 'load_lib',
+			'EE_Message_Type_Collection'                   => 'load_lib',
+			'EE_Message_Type_Collection_Loader'            => 'load_lib',
+			'EE_Messenger_Collection'                      => 'load_lib',
+			'EE_Messenger_Collection_Loader'               => 'load_lib',
+			'EE_Messages_Processor'                        => 'load_lib',
+			'EE_Message_Repository'                        => 'load_lib',
+			'EE_Messages_Queue'                            => 'load_lib',
+			'EE_Messages_Data_Handler_Collection'          => 'load_lib',
+			'EE_Message_Template_Group_Collection'         => 'load_lib',
+			'EE_Payment_Method_Manager'                    => 'load_lib',
+			'EE_DMS_Core_4_1_0'                            => 'load_dms',
+			'EE_DMS_Core_4_2_0'                            => 'load_dms',
+			'EE_DMS_Core_4_3_0'                            => 'load_dms',
+			'EE_DMS_Core_4_5_0'                            => 'load_dms',
+			'EE_DMS_Core_4_6_0'                            => 'load_dms',
+			'EE_DMS_Core_4_7_0'                            => 'load_dms',
+			'EE_DMS_Core_4_8_0'                            => 'load_dms',
+			'EE_DMS_Core_4_9_0'                            => 'load_dms',
+			'EE_DMS_Core_4_10_0'                           => 'load_dms',
+			'EE_DMS_Core_4_11_0'                           => 'load_dms',
+			'EE_DMS_Core_4_12_0'                           => 'load_dms',
+			'EE_Messages_Generator'                        => static function () {
+				return EE_Registry::instance()->load_lib(
+					'Messages_Generator',
+					[],
+					false,
+					false
+				);
+			},
+			'EE_Messages_Template_Defaults'                => static function ($arguments = []) {
+				return EE_Registry::instance()->load_lib(
+					'Messages_Template_Defaults',
+					$arguments,
+					false,
+					false
+				);
+			},
+			// load_helper
+			'EEH_Parse_Shortcodes'                         => static function () {
+				if (EE_Registry::instance()->load_helper('Parse_Shortcodes')) {
+					return new EEH_Parse_Shortcodes();
+				}
+				return null;
+			},
+			'EE_Template_Config'                           => static function () {
+				return EE_Config::instance()->template_settings;
+			},
+			'EE_Currency_Config'                           => static function () {
+				return EE_Currency_Config::getCurrencyConfig();
+			},
+			'EE_Registration_Config'                       => static function () {
+				return EE_Config::instance()->registration;
+			},
+			'EE_Core_Config'                               => static function () {
+				return EE_Config::instance()->core;
+			},
+			'EventEspresso\core\services\loaders\Loader'   => static function () {
+				return LoaderFactory::getLoader();
+			},
+			'EE_Network_Config'                            => static function () {
+				return EE_Network_Config::instance();
+			},
+			'EE_Config'                                    => static function () {
+				return EE_Config::instance();
+			},
+			'EventEspresso\core\domain\Domain'             => static function () {
+				return DomainFactory::getEventEspressoCoreDomain();
+			},
+			'EE_Admin_Config'                              => static function () {
+				return EE_Config::instance()->admin;
+			},
+			'EE_Organization_Config'                       => static function () {
+				return EE_Config::instance()->organization;
+			},
+			'EE_Network_Core_Config'                       => static function () {
+				return EE_Network_Config::instance()->core;
+			},
+			'EE_Environment_Config'                        => static function () {
+				return EE_Config::instance()->environment;
+			},
+			'EED_Core_Rest_Api'                            => static function () {
+				return EED_Core_Rest_Api::instance();
+			},
+			'WP_REST_Server'                               => static function () {
+				return rest_get_server();
+			},
+			'EventEspresso\core\Psr4Autoloader'            => static function () {
+				return EE_Psr4AutoloaderInit::psr4_loader();
+			},
+			'EE_Ticket_Selector_Config'                    => function () {
+				return EE_Config::instance()->template_settings->EED_Ticket_Selector;
+			},
+		];
+	}
+
+
+	/**
+	 * can be used for supplying alternate names for classes,
+	 * or for connecting interface names to instantiable classes
+	 *
+	 * @throws InvalidAliasException
+	 */
+	protected function _register_core_aliases()
+	{
+		$aliases = [
+			'CommandBusInterface'                                                          => 'EventEspresso\core\services\commands\CommandBusInterface',
+			'EventEspresso\core\services\commands\CommandBusInterface'                     => 'EventEspresso\core\services\commands\CommandBus',
+			'CommandHandlerManagerInterface'                                               => 'EventEspresso\core\services\commands\CommandHandlerManagerInterface',
+			'EventEspresso\core\services\commands\CommandHandlerManagerInterface'          => 'EventEspresso\core\services\commands\CommandHandlerManager',
+			'CapChecker'                                                                   => 'EventEspresso\core\services\commands\middleware\CapChecker',
+			'AddActionHook'                                                                => 'EventEspresso\core\services\commands\middleware\AddActionHook',
+			'CapabilitiesChecker'                                                          => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
+			'CapabilitiesCheckerInterface'                                                 => 'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface',
+			'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface' => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
+			'CreateRegistrationService'                                                    => 'EventEspresso\core\domain\services\registration\CreateRegistrationService',
+			'CreateRegistrationCommandHandler'                                             => 'EventEspresso\core\services\commands\registration\CreateRegistrationCommand',
+			'CopyRegistrationDetailsCommandHandler'                                        => 'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommand',
+			'CopyRegistrationPaymentsCommandHandler'                                       => 'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommand',
+			'CancelRegistrationAndTicketLineItemCommandHandler'                            => 'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler',
+			'UpdateRegistrationAndTransactionAfterChangeCommandHandler'                    => 'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler',
+			'CreateTicketLineItemCommandHandler'                                           => 'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommand',
+			'CreateTransactionCommandHandler'                                              => 'EventEspresso\core\services\commands\transaction\CreateTransactionCommandHandler',
+			'CreateAttendeeCommandHandler'                                                 => 'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler',
+			'TableManager'                                                                 => 'EventEspresso\core\services\database\TableManager',
+			'TableAnalysis'                                                                => 'EventEspresso\core\services\database\TableAnalysis',
+			'EspressoShortcode'                                                            => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
+			'ShortcodeInterface'                                                           => 'EventEspresso\core\services\shortcodes\ShortcodeInterface',
+			'EventEspresso\core\services\shortcodes\ShortcodeInterface'                    => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
+			'EventEspresso\core\services\cache\CacheStorageInterface'                      => 'EventEspresso\core\services\cache\TransientCacheStorage',
+			'LoaderInterface'                                                              => 'EventEspresso\core\services\loaders\LoaderInterface',
+			'EventEspresso\core\services\loaders\LoaderInterface'                          => 'EventEspresso\core\services\loaders\Loader',
+			'CommandFactoryInterface'                                                      => 'EventEspresso\core\services\commands\CommandFactoryInterface',
+			'EventEspresso\core\services\commands\CommandFactoryInterface'                 => 'EventEspresso\core\services\commands\CommandFactory',
+			'EmailValidatorInterface'                                                      => 'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface',
+			'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface'  => 'EventEspresso\core\domain\services\validation\email\EmailValidationService',
+			'NoticeConverterInterface'                                                     => 'EventEspresso\core\services\notices\NoticeConverterInterface',
+			'EventEspresso\core\services\notices\NoticeConverterInterface'                 => 'EventEspresso\core\services\notices\ConvertNoticesToEeErrors',
+			'NoticesContainerInterface'                                                    => 'EventEspresso\core\services\notices\NoticesContainerInterface',
+			'EventEspresso\core\services\notices\NoticesContainerInterface'                => 'EventEspresso\core\services\notices\NoticesContainer',
+			'EventEspresso\core\services\request\RequestInterface'                         => 'EventEspresso\core\services\request\Request',
+			'EventEspresso\core\services\request\ResponseInterface'                        => 'EventEspresso\core\services\request\Response',
+			'EventEspresso\core\domain\DomainInterface'                                    => 'EventEspresso\core\domain\Domain',
+			'Registration_Processor'                                                       => 'EE_Registration_Processor',
+			'EventEspresso\core\services\assets\AssetManifestInterface'                    => 'EventEspresso\core\services\assets\AssetManifest',
+		];
+		foreach ($aliases as $alias => $fqn) {
+			if (is_array($fqn)) {
+				foreach ($fqn as $class => $for_class) {
+					$this->class_cache->addAlias($class, $alias, $for_class);
+				}
+				continue;
+			}
+			$this->class_cache->addAlias($fqn, $alias);
+		}
+		if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
+			$this->class_cache->addAlias(
+				'EventEspresso\core\services\notices\ConvertNoticesToAdminNotices',
+				'EventEspresso\core\services\notices\NoticeConverterInterface'
+			);
+		}
+	}
+
+
+	public function debug($for_class = '')
+	{
+		if (method_exists($this->class_cache, 'debug')) {
+			$this->class_cache->debug($for_class);
+		}
+	}
+
+
+	/**
+	 * This is used to reset the internal map and class_loaders to their original default state at the beginning of the
+	 * request Primarily used by unit tests.
+	 */
+	public function reset()
+	{
+		$this->_register_core_class_loaders();
+		$this->_register_core_dependencies();
+	}
+
+
+	/**
+	 * PLZ NOTE: a better name for this method would be is_alias()
+	 * because it returns TRUE if the provided fully qualified name IS an alias
+	 * WHY?
+	 * Because if a class is type hinting for a concretion,
+	 * then why would we need to find another class to supply it?
+	 * ie: if a class asks for `Fully/Qualified/Namespace/SpecificClassName`,
+	 * then give it an instance of `Fully/Qualified/Namespace/SpecificClassName`.
+	 * Don't go looking for some substitute.
+	 * Whereas if a class is type hinting for an interface...
+	 * then we need to find an actual class to use.
+	 * So the interface IS the alias for some other FQN,
+	 * and we need to find out if `Fully/Qualified/Namespace/SomeInterface`
+	 * represents some other class.
+	 *
+	 * @param string $fqn
+	 * @param string $for_class
+	 * @return bool
+	 * @deprecated 4.9.62.p
+	 */
+	public function has_alias(string $fqn = '', string $for_class = ''): bool
+	{
+		return $this->isAlias($fqn, $for_class);
+	}
+
+
+	/**
+	 * PLZ NOTE: a better name for this method would be get_fqn_for_alias()
+	 * because it returns a FQN for provided alias if one exists, otherwise returns the original $alias
+	 * functions recursively, so that multiple aliases can be used to drill down to a FQN
+	 *  for example:
+	 *      if the following two entries were added to the _aliases array:
+	 *          array(
+	 *              'interface_alias'           => 'some\namespace\interface'
+	 *              'some\namespace\interface'  => 'some\namespace\classname'
+	 *          )
+	 *      then one could use EE_Registry::instance()->create( 'interface_alias' )
+	 *      to load an instance of 'some\namespace\classname'
+	 *
+	 * @param string $alias
+	 * @param string $for_class
+	 * @return string
+	 * @deprecated 4.9.62.p
+	 */
+	public function get_alias(string $alias = '', string $for_class = ''): string
+	{
+		return $this->getFqnForAlias($alias, $for_class);
+	}
 }