eventespresso / event-espresso-core

core/libraries/rest_api/RestIncomingQueryParamMetadata.php

Indentation +675 added lines, -675 removed lines

@@ -26,681 +26,681 @@
  */
 class RestIncomingQueryParamMetadata
 {
-    private $query_param_key;
-    private $query_param_value;
-    /**
-     * @var RestIncomingQueryParamContext
-     */
-    private $context;
-
-    /**
-     * @var EE_Model_Field_Base|null
-     */
-    private $field;
-
-    /**
-     * @var string same as $query_param_key but has the * and anything after it removed
-     */
-    private $query_param_key_sans_stars;
-
-    /**
-     * @var string for timezone or timezone offset
-     */
-    private $timezone;
-
-    /**
-     * @var boolean if the field in $query_param_key is for a GMT field (eg `EVT_modified_gmt`)
-     */
-    private $is_gmt_field = false;
-
-    /**
-     * RestIncomingQueryParamMetadata constructor.
-     * You probably want to call
-     * @param string $query_param_key
-     * @param string $query_param_value
-     * @param RestIncomingQueryParamContext $context
-     */
-    public function __construct($query_param_key, $query_param_value, RestIncomingQueryParamContext $context)
-    {
-        $this->query_param_key = $query_param_key;
-        $this->query_param_value = $query_param_value;
-        $this->context = $context;
-        $this->determineFieldAndTimezone();
-    }
-
-    /**
-     * Gets the query parameter key. This may have been modified (see setQueryParamValue())
-     * @return string
-     */
-    public function getQueryParamKey()
-    {
-        return $this->query_param_key;
-    }
-
-    /**
-     * Modifies the query parameter key passed in (Eg this is done when rewriting the simplified specified operator REST
-     * query parameters into the legacy structure)
-     * @param string|array|int|float $query_param_value
-     */
-    private function setQueryParamValue($query_param_value)
-    {
-        $this->query_param_value = $query_param_value;
-    }
-
-    /**
-     * Gets the original query parameter value passed in.
-     * @return string
-     */
-    public function getQueryParamValue()
-    {
-        return $this->query_param_value;
-    }
-
-    /**
-     * Gets the context object.
-     * @return RestIncomingQueryParamContext
-     */
-    public function getContext()
-    {
-        return $this->context;
-    }
-
-    /**
-     * Sets the query parameter key. This may be used to rewrite a key into its non-GMT alternative.
-     * @param string $query_param_key
-     */
-    private function setQueryParamKey($query_param_key)
-    {
-        $this->query_param_key = $query_param_key;
-    }
-
-    /**
-     * Gets the field the query parameter key indicated. This may be null (in cases where the query parameter key
-     * did not indicate a field, eg if it were `OR`).
-     * @return EE_Model_Field_Base|null
-     */
-    public function getField()
-    {
-        return $this->field;
-    }
-
-    /**
-     * Gets the query parameter key (with the star and everything afterwards removed).
-     * @return string
-     */
-    public function getQueryParamKeySansStars()
-    {
-        return $this->query_param_key_sans_stars;
-    }
-
-    /**
-     * Gets the timezone associated with this model (the site timezone, except for GMT datetime fields).
-     * @return string
-     */
-    public function getTimezone()
-    {
-        return $this->timezone;
-    }
-
-    /**
-     * Returns whether or not this is a GMT field
-     * @return boolean
-     */
-    public function isGmtField()
-    {
-        return $this->is_gmt_field;
-    }
-
-    /**
-     * Sets the field indicated by the query parameter key (might be null).
-     * @param EE_Model_Field_Base|null $field
-     */
-    private function setField(EE_Model_Field_Base $field = null)
-    {
-        $this->field = $field;
-    }
-
-    /**
-     * Sets the query parameter key-with-stars-removed.
-     * @param string $query_param_key_sans_stars
-     */
-    private function setQueryParamKeySansStars($query_param_key_sans_stars)
-    {
-        $this->query_param_key_sans_stars = $query_param_key_sans_stars;
-    }
-
-    /**
-     * Sets the timezone (this could be a timezeon offset string).
-     * @param string $timezone
-     */
-    private function setTimezone($timezone)
-    {
-        $this->timezone = $timezone;
-    }
-
-    /**
-     * @param mixed $is_gmt_field
-     */
-    private function setIsGmtField($is_gmt_field)
-    {
-        $this->is_gmt_field = $is_gmt_field;
-    }
-
-    /**
-     * Determines what field, query param name, and query param name without stars, and timezone to use.
-     * @since $VID:$
-     * @type EE_Model_Field_Base $field
-     * @return void {
-     * @throws EE_Error
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidArgumentException
-     */
-    private function determineFieldAndTimezone()
-    {
-        $this->setQueryParamKeySansStars(ModelDataTranslator::removeStarsAndAnythingAfterFromConditionQueryParamKey(
-            $this->getQueryParamKey()
-        ));
-        $this->setField(ModelDataTranslator::deduceFieldFromQueryParam(
-            $this->getQueryParamKeySansStars(),
-            $this->getContext()->getModel()
-        ));
-        // double-check is it a *_gmt field?
-        if (!$this->getField() instanceof EE_Model_Field_Base
-            && ModelDataTranslator::isGmtDateFieldName($this->getQueryParamKeySansStars())
-        ) {
-            // yep, take off '_gmt', and find the field
-            $this->setQueryParamKey(ModelDataTranslator::removeGmtFromFieldName($this->getQueryParamKeySansStars()));
-            $this->setField(ModelDataTranslator::deduceFieldFromQueryParam(
-                $this->getQueryParamKey(),
-                $this->context->getModel()
-            ));
-            $this->setTimezone('UTC');
-            $this->setIsGmtField(true);
-        } elseif ($this->getField() instanceof EE_Datetime_Field) {
-            // so it's not a GMT field. Set the timezone on the model to the default
-            $this->setTimezone(EEH_DTT_Helper::get_valid_timezone_string());
-        } else {
-            // just keep using what's already set for the timezone
-            $this->setTimezone($this->context->getModel()->get_timezone());
-        }
-    }
-
-    /**
-     * Given a ton of input, determines the value to use for the models.
-     * @since $VID:$
-     * @return array|null
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws RestException
-     * @throws DomainException
-     */
-    public function determineConditionsQueryParameterValue()
-    {
-        if ($this->valueIsArrayDuringRead()) {
-            return $this->determineModelValueGivenRestInputArray();
-        }
-        return ModelDataTranslator::prepareFieldValueFromJson(
-            $this->getField(),
-            $this->getQueryParamValue(),
-            $this->getContext()->getRequestedVersion(),
-            $this->getTimezone()
-        );
-    }
-
-    /**
-     * Given that the array value provided was itself an array, handles finding the correct value to pass to the model.
-     * @since $VID:$
-     * @return array|null
-     * @throws RestException
-     */
-    private function determineModelValueGivenRestInputArray()
-    {
-        $this->transformSimplifiedSpecifiedOperatorSyntaxIntoStandardSyntax();
-        // did they specify an operator?
-        if ($this->valueIsLegacySpecifiedOperator()) {
-            $query_param_value = $this->getQueryParamValue();
-            $sub_array_key = $query_param_value[0];
-            $translated_value = array($sub_array_key);
-            if ($this->operatorIsNAry($sub_array_key)) {
-                $translated_value[] = $this->prepareValuesFromJson($query_param_value[1]);
-            } elseif ($this->operatorIsTernary($sub_array_key)) {
-                $translated_value[] = array(
-                    $this->prepareValuesFromJson($query_param_value[1][0]),
-                    $this->prepareValuesFromJson($query_param_value[1][1])
-                );
-            } elseif ($this->operatorIsLike($sub_array_key)) {
-                // we want to leave this value mostly-as-is (eg don't force it to be a float
-                // or a boolean or an enum value. Leave it as-is with wildcards etc)
-                // but do verify it at least doesn't have any serialized data
-                ModelDataTranslator::throwExceptionIfContainsSerializedData($query_param_value[1]);
-                $translated_value[] = $query_param_value[1];
-            } elseif ($this->operatorIsUnary($sub_array_key)) {
-                // no arguments should have been provided, so don't look for any
-            } elseif ($this->operatorisBinary($sub_array_key)) {
-                // it's a valid operator, but none of the exceptions. Treat it normally.
-                $translated_value[] = $this->prepareValuesFromJson($query_param_value[1]);
-            } else {
-                // so they provided a valid operator, but wrong number of arguments
-                $this->throwWrongNumberOfArgsExceptionIfDebugging($sub_array_key);
-                $translated_value = null;
-            }
-        } else {
-            // so they didn't provide a valid operator
-            // if we aren't in debug mode, then just try our best to fulfill the user's request
-            $this->throwInvalidOperatorExceptionIfDebugging();
-            $translated_value = null;
-        }
-        return $translated_value;
-    }
-
-    /**
-     * Returns if this request is a "read" request and the value provided was an array.
-     * This will indicate is such things as `array('<', 123)` and `array('IN', array(1,2,3))` are acceptable or not.
-     * @since $VID:$
-     * @return boolean
-     */
-    private function valueIsArrayDuringRead()
-    {
-        return !$this->getContext()->isWriting() && is_array($this->getQueryParamValue());
-    }
-
-    /**
-     * Returns if the value provided was an associative array (we should have already verified it's an array of some
-     * sort). If the value is an associative array, it had better be in the simplified specified operator structure.
-     * @since $VID:$
-     * @return boolean
-     */
-    private function valueIsAssociativeArray()
-    {
-        return !EEH_Array::is_array_numerically_and_sequentially_indexed($this->getQueryParamValue());
-    }
-
-    /**
-     * Checks if the array value is itself an array that fits into the simplified specified operator structure
-     * (eg `array('!=' => 123)`).
-     * @since $VID:$
-     * @return boolean
-     */
-    private function valueIsSimplifiedSpecifiedOperator()
-    {
-        return count($this->getQueryParamValue()) === 1
-            && array_key_exists(
-                key($this->getQueryParamValue()),
-                $this->getContext()->getModel()->valid_operators()
-            );
-    }
-
-    /**
-     * Throws an exception if the sub-value is an array (eg `array('!=' => array())`). It needs to just be a string,
-     * of either comma-separated-values, or a JSON array.
-     * @since $VID:$
-     * @param $sub_array_key
-     * @param $sub_array_value
-     * @throws RestException
-     */
-    private function assertSubValueIsntArray($sub_array_key, $sub_array_value)
-    {
-        if (is_array($sub_array_value) && EED_Core_Rest_Api::debugMode()) {
-            throw new RestException(
-                'csv_or_json_string_only',
-                sprintf(
-                    /* translators: 1: variable name*/
-                    esc_html__(
-                        'The value provided for the operator "%1$s" should be comma-separated value string or a JSON array.',
-                        'event_espresso'
-                    ),
-                    $sub_array_key
-                ),
-                array(
-                    'status' => 400,
-                )
-            );
-        }
-    }
-
-    /**
-     * Determines if the sub-array key is an operator taking 3 or more operators.
-     * @since $VID:$
-     * @param $sub_array_key
-     * @return boolean
-     */
-    private function subArrayKeyIsNonBinaryOperator($sub_array_key)
-    {
-        return array_key_exists(
-            $sub_array_key,
-            array_merge(
-                $this->getContext()->getModel()->valid_in_style_operators(),
-                $this->getContext()->getModel()->valid_between_style_operators()
-            )
-        );
-    }
-
-    /**
-     * Given that the $sub_array_key is a string, checks if it's an operator taking only 1 argument.
-     * @since $VID:$
-     * @param string $sub_array_key
-     * @return boolean
-     */
-    private function subArrayKeyIsUnaryOperator($sub_array_key)
-    {
-        return array_key_exists(
-            $sub_array_key,
-            $this->getContext()->getModel()->valid_null_style_operators()
-        );
-    }
-
-    /**
-     * Parses the $sub_array_value string into an array (given it could either be a comma-separated-list or a JSON
-     * array). eg `"1,2,3"` or `"[1,2,3]"` into `array(1,2,3)`.
-     * @since $VID:$
-     * @param $sub_array_value
-     * @return array|mixed|object
-     */
-    private function extractQuickStyleSpecifiedOperatorValue($sub_array_value)
-    {
-        // the value should be JSON or CSV
-        $values = json_decode($sub_array_value);
-        if (!is_array($values)) {
-            $values = array_filter(
-                array_map(
-                    'trim',
-                    explode(
-                        ',',
-                        $sub_array_value
-                    )
-                )
-            );
-        }
-        return $values;
-    }
-
-    /**
-     * Throws an exception if the value isn't a simplified specified operator (only called when we expect that).
-     * @since $VID:$
-     * @throws RestException
-     */
-    private function assertSimplifiedSpecifiedOperator()
-    {
-        if (!$this->valueIsSimplifiedSpecifiedOperator() && EED_Core_Rest_Api::debugMode()) {
-            throw new RestException(
-                'numerically_indexed_array_of_values_only',
-                sprintf(
-                    /* translators: 1: variable name*/
-                    esc_html__(
-                        'The array provided for the parameter "%1$s" should be numerically indexed.',
-                        'event_espresso'
-                    ),
-                    $this->getQueryParamKey()
-                ),
-                array(
-                    'status' => 400,
-                )
-            );
-        }
-    }
-
-    /**
-     * If query_param_value were in the simplified specific operator structure, change it into the legacy structure.
-     * @since $VID:$
-     * @throws RestException
-     */
-    private function transformSimplifiedSpecifiedOperatorSyntaxIntoStandardSyntax()
-    {
-        if ($this->valueIsAssociativeArray()) {
-            $this->assertSimplifiedSpecifiedOperator();
-            $query_param_value = $this->getQueryParamValue();
-            $sub_array_value = reset($query_param_value);
-            $sub_array_key = key($query_param_value);
-            $this->assertSubValueIsntArray($sub_array_key, $sub_array_value);
-            // they're doing something like "&where[EVT_ID][IN]=1,2,3" or "&where[EVT_ID][>]=5"
-            if ($this->subArrayKeyIsNonBinaryOperator($sub_array_key)) {
-                $this->setQueryParamValue(array(
-                    $sub_array_key,
-                    $this->extractQuickStyleSpecifiedOperatorValue($sub_array_value)
-                ));
-            } elseif ($this->subArrayKeyIsUnaryOperator($sub_array_key)) {
-                $this->setQueryParamValue(array($sub_array_key));
-            } else {
-                $this->setQueryParamValue(array($sub_array_key, $sub_array_value));
-            }
-        }
-    }
-
-    /**
-     * Returns true is the value is an array using the legacy structure to specify the operator. Eg `array('!=',123)`.
-     * @since $VID:$
-     * @return boolean
-     */
-    private function valueIsLegacySpecifiedOperator()
-    {
-        $valid_operators = $this->getContext()->getModel()->valid_operators();
-        $query_param_value = $this->getQueryParamValue();
-        return isset($query_param_value[0])
-            && isset($valid_operators[ $query_param_value[0] ]);
-    }
-
-    /**
-     * Returns true if the value specified operator accepts arbitrary number of arguments, like "IN".
-     * @since $VID:$
-     * @param $operator
-     * @return boolean
-     */
-    private function operatorIsNAry($operator)
-    {
-        $valueArray = $this->getQueryParamValue();
-        return array_key_exists(
-            $operator,
-            $this->getContext()->getModel()->valid_in_style_operators()
-        )
-            && isset($valueArray[1])
-            && is_array($valueArray[1])
-            && !isset($valueArray[2]);
-    }
-
-    /**
-     * Returns true if the operator accepts 3 arguments (eg "BETWEEN").
-     * So we're looking for a value that looks like
-     * `array('BETWEEN', array('2015-01-01T00:00:00', '2016-01-01T00:00:00'))`.
-     * @since $VID:$
-     * @param $operator
-     * @return boolean
-     */
-    private function operatorIsTernary($operator)
-    {
-        $query_param_value = $this->getQueryParamValue();
-        return array_key_exists($operator, $this->getContext()->getModel()->valid_between_style_operators())
-            && isset($query_param_value[1])
-            && is_array($query_param_value[1])
-            && isset($query_param_value[1][0], $query_param_value[1][1])
-            && !isset($query_param_value[1][2])
-            && !isset($query_param_value[2]);
-    }
-
-    /**
-     * Returns true if the operator is a similar to LIKE, indicating the value may have wildcards we should leave alone.
-     * @since $VID:$
-     * @param $operator
-     * @return boolean
-     */
-    private function operatorIsLike($operator)
-    {
-        $query_param_value = $this->getQueryParamValue();
-        return array_key_exists($operator, $this->getContext()->getModel()->valid_like_style_operators())
-            && isset($query_param_value[1])
-            && !isset($query_param_value[2]);
-    }
-
-    /**
-     * Returns true if the operator only takes one argument (eg it's like `IS NULL`).
-     * @since $VID:$
-     * @param $operator
-     * @return boolean
-     */
-    private function operatorIsUnary($operator)
-    {
-        $query_param_value = $this->getQueryParamValue();
-        return array_key_exists($operator, $this->getContext()->getModel()->valid_null_style_operators())
-            && !isset($query_param_value[1]);
-    }
-
-    /**
-     * Returns true if the operator specified is a binary opeator (eg `=`, `!=`)
-     * @since $VID:$
-     * @param $operator
-     * @return boolean
-     */
-    private function operatorisBinary($operator)
-    {
-        $query_param_value = $this->getQueryParamValue();
-        $model = $this->getContext()->getModel();
-        return isset($query_param_value[1])
-            && !isset($query_param_value[2])
-            && !array_key_exists(
-                $operator,
-                array_merge(
-                    $model->valid_in_style_operators(),
-                    $model->valid_null_style_operators(),
-                    $model->valid_like_style_operators(),
-                    $model->valid_between_style_operators()
-                )
-            );
-    }
-
-    /**
-     * If we're debugging, throws an exception saying that the wrong number of arguments was provided.
-     * @since $VID:$
-     * @param $operator
-     * @throws RestException
-     */
-    private function throwWrongNumberOfArgsExceptionIfDebugging($operator)
-    {
-        if (EED_Core_Rest_Api::debugMode()) {
-            throw new RestException(
-                'wrong_number_of_arguments',
-                sprintf(
-                    esc_html__(
-                        'The operator you provided, "%1$s" had the wrong number of arguments',
-                        'event_espresso'
-                    ),
-                    $operator
-                ),
-                array(
-                    'status' => 400,
-                )
-            );
-        }
-    }
-
-    /**
-     * Wrapper for ModelDataTranslator::prepareFieldValuesFromJson(), just a tad more DRY.
-     * @since $VID:$
-     * @param $value
-     * @return mixed
-     * @throws RestException
-     */
-    private function prepareValuesFromJson($value)
-    {
-        return ModelDataTranslator::prepareFieldValuesFromJson(
-            $this->getField(),
-            $value,
-            $this->getContext()->getRequestedVersion(),
-            $this->getTimezone()
-        );
-    }
-
-    /**
-     * Throws an exception if an invalid operator was specified and we're debugging.
-     * @since $VID:$
-     * @throws RestException
-     */
-    private function throwInvalidOperatorExceptionIfDebugging()
-    {
-        // so they didn't provide a valid operator
-        if (EED_Core_Rest_Api::debugMode()) {
-            throw new RestException(
-                'invalid_operator',
-                sprintf(
-                    esc_html__(
-                        'You provided an invalid parameter, with key "%1$s" and value "%2$s"',
-                        'event_espresso'
-                    ),
-                    $this->getQueryParamKey(),
-                    $this->getQueryParamValue()
-                ),
-                array(
-                    'status' => 400,
-                )
-            );
-        }
-    }
-
-    /**
-     * Returns true if the query_param_key was a logic query parameter, eg `OR`, `AND`, `NOT`, `OR*`, etc.
-     * @since $VID:$
-     * @return boolean
-     */
-    private function isLogicQueryParam()
-    {
-        return in_array($this->getQueryParamKeySansStars(), $this->getContext()->getModel()->logic_query_param_keys());
-    }
-
-
-    /**
-     * If the query param isn't for a field, it must be a nested query parameter which requires different logic.
-     * @since $VID:$
-     * @return array
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws RestException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidArgumentException
-     */
-    public function determineNestedConditionQueryParameters()
-    {
-
-        // so this param doesn't correspond to a field eh?
-        if ($this->getContext()->isWriting()) {
-            // always tell API clients about invalid parameters when they're creating data. Otherwise,
-            // they are probably going to create invalid data
-            throw new RestException(
-                'invalid_field',
-                sprintf(
-                    /* translators: 1: variable name */
-                    esc_html__('You have provided an invalid parameter: "%1$s"', 'event_espresso'),
-                    $this->getQueryParamKey()
-                )
-            );
-        }
-        // so it's not for a field, is it a logic query param key?
-        if ($this->isLogicQueryParam()) {
-            return ModelDataTranslator::prepareConditionsQueryParamsForModels(
-                $this->getQueryParamValue(),
-                $this->getContext()->getModel(),
-                $this->getContext()->getRequestedVersion()
-            );
-        }
-        if (EED_Core_Rest_Api::debugMode()) {
-            // only tell API clients they got it wrong if we're in debug mode
-            // otherwise try our best ot fulfill their request by ignoring this invalid data
-            throw new RestException(
-                'invalid_parameter',
-                sprintf(
-                    /* translators: 1: variable name */
-                    esc_html__(
-                        'You provided an invalid parameter, with key "%1$s"',
-                        'event_espresso'
-                    ),
-                    $this->getQueryParamKey()
-                ),
-                array(
-                    'status' => 400,
-                )
-            );
-        }
-        return null;
-    }
+	private $query_param_key;
+	private $query_param_value;
+	/**
+	 * @var RestIncomingQueryParamContext
+	 */
+	private $context;
+
+	/**
+	 * @var EE_Model_Field_Base|null
+	 */
+	private $field;
+
+	/**
+	 * @var string same as $query_param_key but has the * and anything after it removed
+	 */
+	private $query_param_key_sans_stars;
+
+	/**
+	 * @var string for timezone or timezone offset
+	 */
+	private $timezone;
+
+	/**
+	 * @var boolean if the field in $query_param_key is for a GMT field (eg `EVT_modified_gmt`)
+	 */
+	private $is_gmt_field = false;
+
+	/**
+	 * RestIncomingQueryParamMetadata constructor.
+	 * You probably want to call
+	 * @param string $query_param_key
+	 * @param string $query_param_value
+	 * @param RestIncomingQueryParamContext $context
+	 */
+	public function __construct($query_param_key, $query_param_value, RestIncomingQueryParamContext $context)
+	{
+		$this->query_param_key = $query_param_key;
+		$this->query_param_value = $query_param_value;
+		$this->context = $context;
+		$this->determineFieldAndTimezone();
+	}
+
+	/**
+	 * Gets the query parameter key. This may have been modified (see setQueryParamValue())
+	 * @return string
+	 */
+	public function getQueryParamKey()
+	{
+		return $this->query_param_key;
+	}
+
+	/**
+	 * Modifies the query parameter key passed in (Eg this is done when rewriting the simplified specified operator REST
+	 * query parameters into the legacy structure)
+	 * @param string|array|int|float $query_param_value
+	 */
+	private function setQueryParamValue($query_param_value)
+	{
+		$this->query_param_value = $query_param_value;
+	}
+
+	/**
+	 * Gets the original query parameter value passed in.
+	 * @return string
+	 */
+	public function getQueryParamValue()
+	{
+		return $this->query_param_value;
+	}
+
+	/**
+	 * Gets the context object.
+	 * @return RestIncomingQueryParamContext
+	 */
+	public function getContext()
+	{
+		return $this->context;
+	}
+
+	/**
+	 * Sets the query parameter key. This may be used to rewrite a key into its non-GMT alternative.
+	 * @param string $query_param_key
+	 */
+	private function setQueryParamKey($query_param_key)
+	{
+		$this->query_param_key = $query_param_key;
+	}
+
+	/**
+	 * Gets the field the query parameter key indicated. This may be null (in cases where the query parameter key
+	 * did not indicate a field, eg if it were `OR`).
+	 * @return EE_Model_Field_Base|null
+	 */
+	public function getField()
+	{
+		return $this->field;
+	}
+
+	/**
+	 * Gets the query parameter key (with the star and everything afterwards removed).
+	 * @return string
+	 */
+	public function getQueryParamKeySansStars()
+	{
+		return $this->query_param_key_sans_stars;
+	}
+
+	/**
+	 * Gets the timezone associated with this model (the site timezone, except for GMT datetime fields).
+	 * @return string
+	 */
+	public function getTimezone()
+	{
+		return $this->timezone;
+	}
+
+	/**
+	 * Returns whether or not this is a GMT field
+	 * @return boolean
+	 */
+	public function isGmtField()
+	{
+		return $this->is_gmt_field;
+	}
+
+	/**
+	 * Sets the field indicated by the query parameter key (might be null).
+	 * @param EE_Model_Field_Base|null $field
+	 */
+	private function setField(EE_Model_Field_Base $field = null)
+	{
+		$this->field = $field;
+	}
+
+	/**
+	 * Sets the query parameter key-with-stars-removed.
+	 * @param string $query_param_key_sans_stars
+	 */
+	private function setQueryParamKeySansStars($query_param_key_sans_stars)
+	{
+		$this->query_param_key_sans_stars = $query_param_key_sans_stars;
+	}
+
+	/**
+	 * Sets the timezone (this could be a timezeon offset string).
+	 * @param string $timezone
+	 */
+	private function setTimezone($timezone)
+	{
+		$this->timezone = $timezone;
+	}
+
+	/**
+	 * @param mixed $is_gmt_field
+	 */
+	private function setIsGmtField($is_gmt_field)
+	{
+		$this->is_gmt_field = $is_gmt_field;
+	}
+
+	/**
+	 * Determines what field, query param name, and query param name without stars, and timezone to use.
+	 * @since $VID:$
+	 * @type EE_Model_Field_Base $field
+	 * @return void {
+	 * @throws EE_Error
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidArgumentException
+	 */
+	private function determineFieldAndTimezone()
+	{
+		$this->setQueryParamKeySansStars(ModelDataTranslator::removeStarsAndAnythingAfterFromConditionQueryParamKey(
+			$this->getQueryParamKey()
+		));
+		$this->setField(ModelDataTranslator::deduceFieldFromQueryParam(
+			$this->getQueryParamKeySansStars(),
+			$this->getContext()->getModel()
+		));
+		// double-check is it a *_gmt field?
+		if (!$this->getField() instanceof EE_Model_Field_Base
+			&& ModelDataTranslator::isGmtDateFieldName($this->getQueryParamKeySansStars())
+		) {
+			// yep, take off '_gmt', and find the field
+			$this->setQueryParamKey(ModelDataTranslator::removeGmtFromFieldName($this->getQueryParamKeySansStars()));
+			$this->setField(ModelDataTranslator::deduceFieldFromQueryParam(
+				$this->getQueryParamKey(),
+				$this->context->getModel()
+			));
+			$this->setTimezone('UTC');
+			$this->setIsGmtField(true);
+		} elseif ($this->getField() instanceof EE_Datetime_Field) {
+			// so it's not a GMT field. Set the timezone on the model to the default
+			$this->setTimezone(EEH_DTT_Helper::get_valid_timezone_string());
+		} else {
+			// just keep using what's already set for the timezone
+			$this->setTimezone($this->context->getModel()->get_timezone());
+		}
+	}
+
+	/**
+	 * Given a ton of input, determines the value to use for the models.
+	 * @since $VID:$
+	 * @return array|null
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws RestException
+	 * @throws DomainException
+	 */
+	public function determineConditionsQueryParameterValue()
+	{
+		if ($this->valueIsArrayDuringRead()) {
+			return $this->determineModelValueGivenRestInputArray();
+		}
+		return ModelDataTranslator::prepareFieldValueFromJson(
+			$this->getField(),
+			$this->getQueryParamValue(),
+			$this->getContext()->getRequestedVersion(),
+			$this->getTimezone()
+		);
+	}
+
+	/**
+	 * Given that the array value provided was itself an array, handles finding the correct value to pass to the model.
+	 * @since $VID:$
+	 * @return array|null
+	 * @throws RestException
+	 */
+	private function determineModelValueGivenRestInputArray()
+	{
+		$this->transformSimplifiedSpecifiedOperatorSyntaxIntoStandardSyntax();
+		// did they specify an operator?
+		if ($this->valueIsLegacySpecifiedOperator()) {
+			$query_param_value = $this->getQueryParamValue();
+			$sub_array_key = $query_param_value[0];
+			$translated_value = array($sub_array_key);
+			if ($this->operatorIsNAry($sub_array_key)) {
+				$translated_value[] = $this->prepareValuesFromJson($query_param_value[1]);
+			} elseif ($this->operatorIsTernary($sub_array_key)) {
+				$translated_value[] = array(
+					$this->prepareValuesFromJson($query_param_value[1][0]),
+					$this->prepareValuesFromJson($query_param_value[1][1])
+				);
+			} elseif ($this->operatorIsLike($sub_array_key)) {
+				// we want to leave this value mostly-as-is (eg don't force it to be a float
+				// or a boolean or an enum value. Leave it as-is with wildcards etc)
+				// but do verify it at least doesn't have any serialized data
+				ModelDataTranslator::throwExceptionIfContainsSerializedData($query_param_value[1]);
+				$translated_value[] = $query_param_value[1];
+			} elseif ($this->operatorIsUnary($sub_array_key)) {
+				// no arguments should have been provided, so don't look for any
+			} elseif ($this->operatorisBinary($sub_array_key)) {
+				// it's a valid operator, but none of the exceptions. Treat it normally.
+				$translated_value[] = $this->prepareValuesFromJson($query_param_value[1]);
+			} else {
+				// so they provided a valid operator, but wrong number of arguments
+				$this->throwWrongNumberOfArgsExceptionIfDebugging($sub_array_key);
+				$translated_value = null;
+			}
+		} else {
+			// so they didn't provide a valid operator
+			// if we aren't in debug mode, then just try our best to fulfill the user's request
+			$this->throwInvalidOperatorExceptionIfDebugging();
+			$translated_value = null;
+		}
+		return $translated_value;
+	}
+
+	/**
+	 * Returns if this request is a "read" request and the value provided was an array.
+	 * This will indicate is such things as `array('<', 123)` and `array('IN', array(1,2,3))` are acceptable or not.
+	 * @since $VID:$
+	 * @return boolean
+	 */
+	private function valueIsArrayDuringRead()
+	{
+		return !$this->getContext()->isWriting() && is_array($this->getQueryParamValue());
+	}
+
+	/**
+	 * Returns if the value provided was an associative array (we should have already verified it's an array of some
+	 * sort). If the value is an associative array, it had better be in the simplified specified operator structure.
+	 * @since $VID:$
+	 * @return boolean
+	 */
+	private function valueIsAssociativeArray()
+	{
+		return !EEH_Array::is_array_numerically_and_sequentially_indexed($this->getQueryParamValue());
+	}
+
+	/**
+	 * Checks if the array value is itself an array that fits into the simplified specified operator structure
+	 * (eg `array('!=' => 123)`).
+	 * @since $VID:$
+	 * @return boolean
+	 */
+	private function valueIsSimplifiedSpecifiedOperator()
+	{
+		return count($this->getQueryParamValue()) === 1
+			&& array_key_exists(
+				key($this->getQueryParamValue()),
+				$this->getContext()->getModel()->valid_operators()
+			);
+	}
+
+	/**
+	 * Throws an exception if the sub-value is an array (eg `array('!=' => array())`). It needs to just be a string,
+	 * of either comma-separated-values, or a JSON array.
+	 * @since $VID:$
+	 * @param $sub_array_key
+	 * @param $sub_array_value
+	 * @throws RestException
+	 */
+	private function assertSubValueIsntArray($sub_array_key, $sub_array_value)
+	{
+		if (is_array($sub_array_value) && EED_Core_Rest_Api::debugMode()) {
+			throw new RestException(
+				'csv_or_json_string_only',
+				sprintf(
+					/* translators: 1: variable name*/
+					esc_html__(
+						'The value provided for the operator "%1$s" should be comma-separated value string or a JSON array.',
+						'event_espresso'
+					),
+					$sub_array_key
+				),
+				array(
+					'status' => 400,
+				)
+			);
+		}
+	}
+
+	/**
+	 * Determines if the sub-array key is an operator taking 3 or more operators.
+	 * @since $VID:$
+	 * @param $sub_array_key
+	 * @return boolean
+	 */
+	private function subArrayKeyIsNonBinaryOperator($sub_array_key)
+	{
+		return array_key_exists(
+			$sub_array_key,
+			array_merge(
+				$this->getContext()->getModel()->valid_in_style_operators(),
+				$this->getContext()->getModel()->valid_between_style_operators()
+			)
+		);
+	}
+
+	/**
+	 * Given that the $sub_array_key is a string, checks if it's an operator taking only 1 argument.
+	 * @since $VID:$
+	 * @param string $sub_array_key
+	 * @return boolean
+	 */
+	private function subArrayKeyIsUnaryOperator($sub_array_key)
+	{
+		return array_key_exists(
+			$sub_array_key,
+			$this->getContext()->getModel()->valid_null_style_operators()
+		);
+	}
+
+	/**
+	 * Parses the $sub_array_value string into an array (given it could either be a comma-separated-list or a JSON
+	 * array). eg `"1,2,3"` or `"[1,2,3]"` into `array(1,2,3)`.
+	 * @since $VID:$
+	 * @param $sub_array_value
+	 * @return array|mixed|object
+	 */
+	private function extractQuickStyleSpecifiedOperatorValue($sub_array_value)
+	{
+		// the value should be JSON or CSV
+		$values = json_decode($sub_array_value);
+		if (!is_array($values)) {
+			$values = array_filter(
+				array_map(
+					'trim',
+					explode(
+						',',
+						$sub_array_value
+					)
+				)
+			);
+		}
+		return $values;
+	}
+
+	/**
+	 * Throws an exception if the value isn't a simplified specified operator (only called when we expect that).
+	 * @since $VID:$
+	 * @throws RestException
+	 */
+	private function assertSimplifiedSpecifiedOperator()
+	{
+		if (!$this->valueIsSimplifiedSpecifiedOperator() && EED_Core_Rest_Api::debugMode()) {
+			throw new RestException(
+				'numerically_indexed_array_of_values_only',
+				sprintf(
+					/* translators: 1: variable name*/
+					esc_html__(
+						'The array provided for the parameter "%1$s" should be numerically indexed.',
+						'event_espresso'
+					),
+					$this->getQueryParamKey()
+				),
+				array(
+					'status' => 400,
+				)
+			);
+		}
+	}
+
+	/**
+	 * If query_param_value were in the simplified specific operator structure, change it into the legacy structure.
+	 * @since $VID:$
+	 * @throws RestException
+	 */
+	private function transformSimplifiedSpecifiedOperatorSyntaxIntoStandardSyntax()
+	{
+		if ($this->valueIsAssociativeArray()) {
+			$this->assertSimplifiedSpecifiedOperator();
+			$query_param_value = $this->getQueryParamValue();
+			$sub_array_value = reset($query_param_value);
+			$sub_array_key = key($query_param_value);
+			$this->assertSubValueIsntArray($sub_array_key, $sub_array_value);
+			// they're doing something like "&where[EVT_ID][IN]=1,2,3" or "&where[EVT_ID][>]=5"
+			if ($this->subArrayKeyIsNonBinaryOperator($sub_array_key)) {
+				$this->setQueryParamValue(array(
+					$sub_array_key,
+					$this->extractQuickStyleSpecifiedOperatorValue($sub_array_value)
+				));
+			} elseif ($this->subArrayKeyIsUnaryOperator($sub_array_key)) {
+				$this->setQueryParamValue(array($sub_array_key));
+			} else {
+				$this->setQueryParamValue(array($sub_array_key, $sub_array_value));
+			}
+		}
+	}
+
+	/**
+	 * Returns true is the value is an array using the legacy structure to specify the operator. Eg `array('!=',123)`.
+	 * @since $VID:$
+	 * @return boolean
+	 */
+	private function valueIsLegacySpecifiedOperator()
+	{
+		$valid_operators = $this->getContext()->getModel()->valid_operators();
+		$query_param_value = $this->getQueryParamValue();
+		return isset($query_param_value[0])
+			&& isset($valid_operators[ $query_param_value[0] ]);
+	}
+
+	/**
+	 * Returns true if the value specified operator accepts arbitrary number of arguments, like "IN".
+	 * @since $VID:$
+	 * @param $operator
+	 * @return boolean
+	 */
+	private function operatorIsNAry($operator)
+	{
+		$valueArray = $this->getQueryParamValue();
+		return array_key_exists(
+			$operator,
+			$this->getContext()->getModel()->valid_in_style_operators()
+		)
+			&& isset($valueArray[1])
+			&& is_array($valueArray[1])
+			&& !isset($valueArray[2]);
+	}
+
+	/**
+	 * Returns true if the operator accepts 3 arguments (eg "BETWEEN").
+	 * So we're looking for a value that looks like
+	 * `array('BETWEEN', array('2015-01-01T00:00:00', '2016-01-01T00:00:00'))`.
+	 * @since $VID:$
+	 * @param $operator
+	 * @return boolean
+	 */
+	private function operatorIsTernary($operator)
+	{
+		$query_param_value = $this->getQueryParamValue();
+		return array_key_exists($operator, $this->getContext()->getModel()->valid_between_style_operators())
+			&& isset($query_param_value[1])
+			&& is_array($query_param_value[1])
+			&& isset($query_param_value[1][0], $query_param_value[1][1])
+			&& !isset($query_param_value[1][2])
+			&& !isset($query_param_value[2]);
+	}
+
+	/**
+	 * Returns true if the operator is a similar to LIKE, indicating the value may have wildcards we should leave alone.
+	 * @since $VID:$
+	 * @param $operator
+	 * @return boolean
+	 */
+	private function operatorIsLike($operator)
+	{
+		$query_param_value = $this->getQueryParamValue();
+		return array_key_exists($operator, $this->getContext()->getModel()->valid_like_style_operators())
+			&& isset($query_param_value[1])
+			&& !isset($query_param_value[2]);
+	}
+
+	/**
+	 * Returns true if the operator only takes one argument (eg it's like `IS NULL`).
+	 * @since $VID:$
+	 * @param $operator
+	 * @return boolean
+	 */
+	private function operatorIsUnary($operator)
+	{
+		$query_param_value = $this->getQueryParamValue();
+		return array_key_exists($operator, $this->getContext()->getModel()->valid_null_style_operators())
+			&& !isset($query_param_value[1]);
+	}
+
+	/**
+	 * Returns true if the operator specified is a binary opeator (eg `=`, `!=`)
+	 * @since $VID:$
+	 * @param $operator
+	 * @return boolean
+	 */
+	private function operatorisBinary($operator)
+	{
+		$query_param_value = $this->getQueryParamValue();
+		$model = $this->getContext()->getModel();
+		return isset($query_param_value[1])
+			&& !isset($query_param_value[2])
+			&& !array_key_exists(
+				$operator,
+				array_merge(
+					$model->valid_in_style_operators(),
+					$model->valid_null_style_operators(),
+					$model->valid_like_style_operators(),
+					$model->valid_between_style_operators()
+				)
+			);
+	}
+
+	/**
+	 * If we're debugging, throws an exception saying that the wrong number of arguments was provided.
+	 * @since $VID:$
+	 * @param $operator
+	 * @throws RestException
+	 */
+	private function throwWrongNumberOfArgsExceptionIfDebugging($operator)
+	{
+		if (EED_Core_Rest_Api::debugMode()) {
+			throw new RestException(
+				'wrong_number_of_arguments',
+				sprintf(
+					esc_html__(
+						'The operator you provided, "%1$s" had the wrong number of arguments',
+						'event_espresso'
+					),
+					$operator
+				),
+				array(
+					'status' => 400,
+				)
+			);
+		}
+	}
+
+	/**
+	 * Wrapper for ModelDataTranslator::prepareFieldValuesFromJson(), just a tad more DRY.
+	 * @since $VID:$
+	 * @param $value
+	 * @return mixed
+	 * @throws RestException
+	 */
+	private function prepareValuesFromJson($value)
+	{
+		return ModelDataTranslator::prepareFieldValuesFromJson(
+			$this->getField(),
+			$value,
+			$this->getContext()->getRequestedVersion(),
+			$this->getTimezone()
+		);
+	}
+
+	/**
+	 * Throws an exception if an invalid operator was specified and we're debugging.
+	 * @since $VID:$
+	 * @throws RestException
+	 */
+	private function throwInvalidOperatorExceptionIfDebugging()
+	{
+		// so they didn't provide a valid operator
+		if (EED_Core_Rest_Api::debugMode()) {
+			throw new RestException(
+				'invalid_operator',
+				sprintf(
+					esc_html__(
+						'You provided an invalid parameter, with key "%1$s" and value "%2$s"',
+						'event_espresso'
+					),
+					$this->getQueryParamKey(),
+					$this->getQueryParamValue()
+				),
+				array(
+					'status' => 400,
+				)
+			);
+		}
+	}
+
+	/**
+	 * Returns true if the query_param_key was a logic query parameter, eg `OR`, `AND`, `NOT`, `OR*`, etc.
+	 * @since $VID:$
+	 * @return boolean
+	 */
+	private function isLogicQueryParam()
+	{
+		return in_array($this->getQueryParamKeySansStars(), $this->getContext()->getModel()->logic_query_param_keys());
+	}
+
+
+	/**
+	 * If the query param isn't for a field, it must be a nested query parameter which requires different logic.
+	 * @since $VID:$
+	 * @return array
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws RestException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidArgumentException
+	 */
+	public function determineNestedConditionQueryParameters()
+	{
+
+		// so this param doesn't correspond to a field eh?
+		if ($this->getContext()->isWriting()) {
+			// always tell API clients about invalid parameters when they're creating data. Otherwise,
+			// they are probably going to create invalid data
+			throw new RestException(
+				'invalid_field',
+				sprintf(
+					/* translators: 1: variable name */
+					esc_html__('You have provided an invalid parameter: "%1$s"', 'event_espresso'),
+					$this->getQueryParamKey()
+				)
+			);
+		}
+		// so it's not for a field, is it a logic query param key?
+		if ($this->isLogicQueryParam()) {
+			return ModelDataTranslator::prepareConditionsQueryParamsForModels(
+				$this->getQueryParamValue(),
+				$this->getContext()->getModel(),
+				$this->getContext()->getRequestedVersion()
+			);
+		}
+		if (EED_Core_Rest_Api::debugMode()) {
+			// only tell API clients they got it wrong if we're in debug mode
+			// otherwise try our best ot fulfill their request by ignoring this invalid data
+			throw new RestException(
+				'invalid_parameter',
+				sprintf(
+					/* translators: 1: variable name */
+					esc_html__(
+						'You provided an invalid parameter, with key "%1$s"',
+						'event_espresso'
+					),
+					$this->getQueryParamKey()
+				),
+				array(
+					'status' => 400,
+				)
+			);
+		}
+		return null;
+	}
 }
 // End of file RestQueryParamMetadata.php
 // Location: EventEspresso\core\libraries\rest_api/RestQueryParamMetadata.php