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<?php |
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namespace Carbon_Fields\Toolset; |
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use Carbon_Fields\Value_Set\Value_Set; |
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use Carbon_Fields\Exception\Incorrect_Syntax_Exception; |
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/** |
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* Provides common tools when dealing with storage keys |
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* |
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* Key schema: |
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* _[root_field_name]|[parent:field:names:separated:with:colons]|[complex:group:indexes:separated:with:colons]|[value_index]|[property] |
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* |
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* Example: |
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* _countries|major_cities:name|0:1|0|value |
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* This key is for a field called "name" inside the complex field "major_cities" with group index 1, which is inside the complex field "countries" with group index 0 |
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*/ |
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class Key_Toolset { |
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/** |
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* Prefix appended to all keys |
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*/ |
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const KEY_PREFIX = '_'; |
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/** |
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* Value property to use for fields which need to be kept "alive" when they have no values stored (e.g. Set field with 0 checkboxes checked) |
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* Required to determine whether a field should use its default value or stay blank |
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* |
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* @var string |
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*/ |
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const KEEPALIVE_PROPERTY = '_empty'; |
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/** |
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* Glue characters between segments in keys |
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*/ |
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const SEGMENT_GLUE = '|'; |
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/** |
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* Glue characters between segments values in keys |
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*/ |
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const SEGMENT_VALUE_GLUE = ':'; |
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/** |
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* Number of segments in a key |
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*/ |
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const TOTAL_SEGMENTS = 5; |
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/** |
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* "Equal" storage key pattern comparison type constant |
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*/ |
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const PATTERN_COMPARISON_EQUAL = '='; |
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/** |
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* "Starts with" storage key pattern comparison type constant |
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*/ |
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const PATTERN_COMPARISON_STARTS_WITH = '^'; |
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/** |
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* Get the KEEPALIVE_PROPERTY |
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* Needed since php 5.3 cannot parse $instance->property::constant ( but parses $instance::constant ) |
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* |
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* @return string |
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*/ |
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public function get_keepalive_property() { |
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return static::KEEPALIVE_PROPERTY; |
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} |
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/** |
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* Get sanitized hierarchy index for hierarchy |
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* |
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* @param array<string> $full_hierarchy |
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* @param array<int> $full_hierarchy_index |
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* @return array<int> |
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*/ |
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public function get_sanitized_hierarchy_index( $full_hierarchy, $full_hierarchy_index ) { |
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$full_hierarchy_index = array_slice( $full_hierarchy_index, 0, count( $full_hierarchy ) - 1 ); |
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if ( empty( $full_hierarchy_index ) ) { |
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$full_hierarchy_index = array(); |
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} |
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$full_hierarchy_index = array_map( 'intval', $full_hierarchy_index ); |
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return $full_hierarchy_index; |
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} |
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/** |
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* Get a storage key for a simple root field |
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* |
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* @param string $field_base_name |
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* @return string |
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*/ |
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protected function get_storage_key_for_simple_root_field( $field_base_name ) { |
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$storage_key = static::KEY_PREFIX . $field_base_name; |
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return $storage_key; |
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} |
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/** |
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* Get a storage key for the root field |
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* Suitable for deleting entire trees of values (e.g. Complex_Field) |
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* |
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* @param array $full_hierarchy |
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* @return string |
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*/ |
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protected function get_storage_key_root( $full_hierarchy ) { |
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$first_parent = array_shift( $full_hierarchy ); |
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$storage_key = static::KEY_PREFIX . $first_parent . static::SEGMENT_GLUE; |
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return $storage_key; |
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} |
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/** |
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* Get a storage key up to the hierarchy index segment |
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* Suitable for getting and deleting multiple values for a single field |
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* |
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* @param array<string> $full_hierarchy |
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* @param array<int> $full_hierarchy_index |
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* @return string |
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*/ |
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protected function get_storage_key_prefix( $full_hierarchy, $full_hierarchy_index ) { |
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$full_hierarchy_index = $this->get_sanitized_hierarchy_index( $full_hierarchy, $full_hierarchy_index ); |
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$parents = $full_hierarchy; |
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$first_parent = array_shift( $parents ); |
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$storage_key = static::KEY_PREFIX . |
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$first_parent . |
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static::SEGMENT_GLUE . |
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implode( static::SEGMENT_VALUE_GLUE, $parents ) . |
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static::SEGMENT_GLUE . |
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implode( static::SEGMENT_VALUE_GLUE, $full_hierarchy_index ) . |
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static::SEGMENT_GLUE; |
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return $storage_key; |
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} |
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/** |
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* Get a full storage key for a single field value |
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* |
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* @param bool $is_simple_root_field |
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* @param array<string> $full_hierarchy |
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* @param array<int> $full_hierarchy_index |
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* @param int $value_group_index |
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* @param string $property |
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* @return string |
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*/ |
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public function get_storage_key( $is_simple_root_field, $full_hierarchy, $full_hierarchy_index, $value_group_index, $property ) { |
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$full_hierarchy_index = $this->get_sanitized_hierarchy_index( $full_hierarchy, $full_hierarchy_index ); |
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if ( $is_simple_root_field && $property === Value_Set::VALUE_PROPERTY ) { |
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return $this->get_storage_key_for_simple_root_field( array_shift( $full_hierarchy ) ); |
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} |
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$storage_key = $this->get_storage_key_prefix( $full_hierarchy, $full_hierarchy_index ) . intval( $value_group_index ) . static::SEGMENT_GLUE . $property; |
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return $storage_key; |
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} |
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/** |
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* Get a full storage key with optional wildcards for entry and value indexes |
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* |
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* @param bool $is_simple_root_field |
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* @param array<string> $full_hierarchy |
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* @param string $property |
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* @param string $wildcard |
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* @return string |
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*/ |
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public function get_storage_key_with_index_wildcards( $is_simple_root_field, $full_hierarchy, $property = Value_Set::VALUE_PROPERTY, $wildcard = '%' ) { |
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if ( $is_simple_root_field && $property === Value_Set::VALUE_PROPERTY ) { |
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return $this->get_storage_key_for_simple_root_field( array_shift( $full_hierarchy ) ); |
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} |
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$parents = $full_hierarchy; |
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$first_parent = array_shift( $parents ); |
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$hierarchy = array_slice( $full_hierarchy, 0, -1 ); |
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$hierarchy_index = ! empty( $hierarchy ) ? $wildcard : ''; |
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$value_group_index = $wildcard; |
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$storage_key = static::KEY_PREFIX . |
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$first_parent . |
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static::SEGMENT_GLUE . |
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implode( static::SEGMENT_VALUE_GLUE, $parents ) . |
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static::SEGMENT_GLUE . |
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$hierarchy_index . |
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static::SEGMENT_GLUE . |
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$value_group_index . |
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static::SEGMENT_GLUE . |
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$property; |
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return $storage_key; |
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} |
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/** |
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* Get an array of storage key patterns for use when getting values from storage |
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* |
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* @param bool $is_simple_root_field |
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* @param array<string> $full_hierarchy |
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* @return array |
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*/ |
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public function get_storage_key_getter_patterns( $is_simple_root_field, $full_hierarchy ) { |
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$patterns = array(); |
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View Code Duplication |
if ( $is_simple_root_field ) { |
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$key = $this->get_storage_key_for_simple_root_field( $full_hierarchy[ count( $full_hierarchy ) - 1 ] ); |
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$patterns[ $key ] = static::PATTERN_COMPARISON_EQUAL; |
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} |
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$parents = $full_hierarchy; |
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$first_parent = array_shift( $parents ); |
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$storage_key = static::KEY_PREFIX . $first_parent . static::SEGMENT_GLUE; |
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if ( empty( $parents ) ) { |
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$patterns[ $storage_key ] = static::PATTERN_COMPARISON_STARTS_WITH; |
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} else { |
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$key = $storage_key . implode( static::SEGMENT_VALUE_GLUE, $parents ) . static::SEGMENT_GLUE; |
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$patterns[ $key ] = static::PATTERN_COMPARISON_STARTS_WITH; |
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$key = $storage_key . implode( static::SEGMENT_VALUE_GLUE, $parents ) . static::SEGMENT_VALUE_GLUE; |
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$patterns[ $key ] = static::PATTERN_COMPARISON_STARTS_WITH; |
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} |
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return $patterns; |
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} |
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/** |
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* Get an array of storage key patterns for use when deleting values from storage |
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* |
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* @param bool $is_complex_field |
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* @param bool $is_simple_root_field |
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* @param array<string> $full_hierarchy |
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* @param array<int> $full_hierarchy_index |
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* @return array |
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*/ |
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public function get_storage_key_deleter_patterns( $is_complex_field, $is_simple_root_field, $full_hierarchy, $full_hierarchy_index ) { |
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$full_hierarchy_index = $this->get_sanitized_hierarchy_index( $full_hierarchy, $full_hierarchy_index ); |
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$patterns = array(); |
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View Code Duplication |
if ( $is_simple_root_field ) { |
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$key = $this->get_storage_key_for_simple_root_field( $full_hierarchy[ count( $full_hierarchy ) - 1 ] ); |
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$patterns[ $key ] = static::PATTERN_COMPARISON_EQUAL; |
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} |
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if ( $is_complex_field ) { |
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$patterns[ $this->get_storage_key_root( $full_hierarchy ) ] = static::PATTERN_COMPARISON_STARTS_WITH; |
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} else { |
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$patterns[ $this->get_storage_key_prefix( $full_hierarchy, $full_hierarchy_index ) ] = static::PATTERN_COMPARISON_STARTS_WITH; |
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} |
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return $patterns; |
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} |
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/** |
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* Convert an array of storage key patterns to a parentheses-enclosed sql comparison |
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* |
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* @param string $table_column |
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* @param array $patterns |
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* @return string |
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*/ |
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public function storage_key_patterns_to_sql( $table_column, $patterns ) { |
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$sql = array(); |
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foreach ( $patterns as $storage_key => $type ) { |
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$comparison = ''; |
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switch ( $type ) { |
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case static::PATTERN_COMPARISON_EQUAL: |
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$comparison = $table_column . ' = "' . esc_sql( $storage_key ) . '"'; |
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break; |
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case static::PATTERN_COMPARISON_STARTS_WITH: |
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$comparison = $table_column . ' LIKE "' . esc_sql( $storage_key ) . '%"'; |
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break; |
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default: |
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Incorrect_Syntax_Exception::raise( 'Unsupported storage key pattern type used: "' . $type . '"' ); |
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break; |
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} |
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$sql[] = $comparison; |
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} |
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return ' ( ' . implode( ' OR ', $sql ) . ' ) '; |
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} |
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/** |
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* Check if a storage key matches any pattern |
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* |
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* @param string $storage_key |
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* @param array $patterns |
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* @return bool |
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*/ |
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8 |
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public function storage_key_matches_any_pattern( $storage_key, $patterns ) { |
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8 |
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foreach ( $patterns as $key => $type ) { |
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switch ( $type ) { |
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8 |
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case static::PATTERN_COMPARISON_EQUAL: |
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5 |
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if ( $storage_key === $key ) { |
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3 |
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return true; |
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} |
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break; |
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case static::PATTERN_COMPARISON_STARTS_WITH: |
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$key_length = strlen( $key ); |
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3 |
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if ( substr( $storage_key, 0, $key_length ) === $key ) { |
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1 |
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return true; |
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} |
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2 |
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break; |
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default: |
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1 |
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Incorrect_Syntax_Exception::raise( 'Unsupported storage key pattern type used: "' . $type . '"' ); |
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4 |
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break; |
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} |
298
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} |
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3 |
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return false; |
300
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} |
301
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302
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/** |
303
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* Check if an array of segments has all of its segments |
304
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* |
305
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* @param array<string> $segments_array |
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* @return bool |
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*/ |
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1 |
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public function is_segments_array_full( $segments_array ) { |
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1 |
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return ( count( $segments_array ) === static::TOTAL_SEGMENTS ); |
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} |
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312
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/** |
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* Convert a storage key to an array of its segments |
314
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* |
315
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* @param string $storage_key |
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* @return array<string> |
317
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*/ |
318
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1 |
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public function storage_key_to_segments_array( $storage_key ) { |
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1 |
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$key = substr( $storage_key, strlen( static::KEY_PREFIX ) ); // drop the key prefix |
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1 |
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$segments = explode( static::SEGMENT_GLUE, $key ); |
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1 |
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return $segments; |
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} |
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324
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/** |
325
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* Convert a segment to an array of its values |
326
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* |
327
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* @param string $segment |
328
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* @return array<mixed> |
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*/ |
330
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1 |
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public function segment_to_segment_values_array( $segment ) { |
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1 |
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return explode( static::SEGMENT_VALUE_GLUE , $segment ); |
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} |
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/** |
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* Get a parsed array of storage key segments and values |
336
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* |
337
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* @param string $storage_key |
338
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|
|
* @return array |
339
|
|
|
*/ |
340
|
3 |
|
public function parse_storage_key( $storage_key ) { |
341
|
|
|
$parsed = array( |
342
|
3 |
|
'root' => '', |
343
|
|
|
'hierarchy' => array(), |
344
|
|
|
'hierarchy_index' => array(), |
345
|
3 |
|
'value_index' => 0, |
346
|
3 |
|
'property' => Value_Set::VALUE_PROPERTY, |
347
|
|
|
); |
348
|
|
|
|
349
|
3 |
|
$segments = $this->storage_key_to_segments_array( $storage_key ); |
350
|
|
|
|
351
|
3 |
|
$parsed['root'] = $segments[0]; |
352
|
3 |
|
if ( $this->is_segments_array_full( $segments ) ) { |
353
|
2 |
|
$parsed['hierarchy'] = array_filter( explode( static::SEGMENT_VALUE_GLUE, $segments[1] ) ); |
354
|
|
|
|
355
|
2 |
|
if ( ! empty( $segments[2] ) ) { |
356
|
2 |
|
$parsed['hierarchy_index'] = array_map( 'intval', explode( static::SEGMENT_VALUE_GLUE, $segments[2] ) ); |
357
|
|
|
} |
358
|
|
|
|
359
|
2 |
|
$parsed['value_index'] = intval( $segments[3] ); |
360
|
|
|
|
361
|
2 |
|
$parsed['property'] = $segments[4]; |
362
|
|
|
} |
363
|
|
|
|
364
|
|
|
// Add utility values |
365
|
3 |
|
$parsed['full_hierarchy'] = array_merge( array( $parsed['root'] ), $parsed['hierarchy'] ); |
366
|
|
|
|
367
|
3 |
|
return $parsed; |
368
|
|
|
} |
369
|
|
|
} |
370
|
|
|
|