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<?php |
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//[PHPCOMPRESSOR(remove,start)] |
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/** |
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* Created by Vitaly Iegorov <[email protected]>. |
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* on 23.03.16 at 11:45 |
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*/ |
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namespace samsoncms\api\generator\analyzer; |
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use samson\activerecord\dbMySQLConnector; |
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use samsoncms\api\Field; |
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use samsoncms\api\generator\exception\ParentEntityNotFound; |
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/** |
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* Generic entities metadata analyzer. |
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* |
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* @package samsoncms\api\analyzer |
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*/ |
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class Virtual extends Generic |
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{ |
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/** |
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* Analyze virtual entities and gather their metadata. |
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* |
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* @return \samsoncms\api\generator\metadata\Virtual[] |
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* @throws ParentEntityNotFound |
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*/ |
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public function analyze() |
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{ |
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$metadataCollection = []; |
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// Iterate all structures, parents first |
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foreach ($this->getVirtualEntities() as $structureRow) { |
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// Fill in entity metadata |
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$metadata = new \samsoncms\api\generator\metadata\Virtual(); |
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// Get CapsCase and transliterated entity name |
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$metadata->entity = $this->entityName($structureRow['Name']); |
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$metadata->entityClassName = $this->fullEntityName($metadata->entity); |
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$metadata->entityRealName = $structureRow['Name']; |
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$metadata->entityID = $structureRow['StructureID']; |
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// Try to find entity parent identifier for building future relations |
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$metadata->parentID = $this->getParentEntity($structureRow['StructureID']); |
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// TODO: Add multiple parent and fetching their data in a loop |
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// Set pointer to parent entity |
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if (null !== $metadata->parentID) { |
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if (array_key_exists($metadata->parentID, $metadataCollection)) { |
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$metadata->parent = $metadataCollection[$metadata->parentID]; |
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// Add all parent metadata to current object |
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$metadata->defaultValues = $metadata->parent->defaultValues; |
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$metadata->realNames = $metadata->parent->realNames; |
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$metadata->allFieldIDs = $metadata->parent->allFieldIDs; |
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$metadata->allFieldNames = $metadata->parent->allFieldNames; |
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$metadata->allFieldValueColumns = $metadata->parent->allFieldValueColumns; |
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$metadata->allFieldTypes = $metadata->parent->allFieldTypes; |
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$metadata->fieldDescriptions = $metadata->parent->fieldDescriptions; |
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$metadata->localizedFieldIDs = $metadata->parent->localizedFieldIDs; |
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$metadata->notLocalizedFieldIDs = $metadata->parent->notLocalizedFieldIDs; |
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} else { |
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throw new ParentEntityNotFound($metadata->parentID); |
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} |
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} |
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// Get old AR collections of metadata |
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$metadata->arSelect = \samson\activerecord\material::$_sql_select; |
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$metadata->arAttributes = \samson\activerecord\material::$_attributes; |
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$metadata->arMap = \samson\activerecord\material::$_map; |
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$metadata->arFrom = \samson\activerecord\material::$_sql_from; |
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$metadata->arGroup = \samson\activerecord\material::$_own_group; |
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$metadata->arRelationAlias = \samson\activerecord\material::$_relation_alias; |
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$metadata->arRelationType = \samson\activerecord\material::$_relation_type; |
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$metadata->arRelations = \samson\activerecord\material::$_relations; |
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// Add SamsonCMS material needed data |
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$metadata->arSelect['this'] = ' STRAIGHT_JOIN ' . $metadata->arSelect['this']; |
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$metadata->arFrom['this'] .= "\n" . |
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'LEFT JOIN ' . dbMySQLConnector::$prefix . 'materialfield as _mf |
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ON ' . dbMySQLConnector::$prefix . 'material.MaterialID = _mf.MaterialID'; |
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$metadata->arGroup[] = dbMySQLConnector::$prefix . 'material.MaterialID'; |
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// Iterate entity fields |
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foreach ($this->getEntityFields($structureRow['StructureID']) as $fieldID => $fieldRow) { |
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// Get camelCase and transliterated field name |
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$fieldName = $this->fieldName($fieldRow['Name']); |
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// TODO: Set default for additional field storing type accordingly. |
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// Store field metadata |
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$metadata->realNames[$fieldRow['Name']] = $fieldName; |
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$metadata->allFieldIDs[$fieldID] = $fieldName; |
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$metadata->allFieldNames[$fieldName] = $fieldID; |
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$metadata->allFieldValueColumns[$fieldID] = Field::valueColumn($fieldRow[Field::F_TYPE]); |
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$metadata->allFieldTypes[$fieldID] = Field::phpType($fieldRow['Type']); |
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$metadata->allFieldCmsTypes[$fieldID] = (int)$fieldRow['Type']; |
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$metadata->fieldDescriptions[$fieldID] = $fieldRow['Description'] . ', ' . $fieldRow['Name'] . '#' . $fieldID; |
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$metadata->fieldRawDescriptions[$fieldID] = $fieldRow['Description']; |
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// Fill localization fields collections |
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if ($fieldRow[Field::F_LOCALIZED] == 1) { |
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$metadata->localizedFieldIDs[$fieldID] = $fieldName; |
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} else { |
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$metadata->notLocalizedFieldIDs[$fieldID] = $fieldName; |
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} |
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// Set old AR collections of metadata |
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$metadata->arAttributes[$fieldName] = $fieldName; |
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$metadata->arMap[$fieldName] = dbMySQLConnector::$prefix . 'material.' . $fieldName; |
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// Add additional field column to entity query |
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$equal = '((_mf.FieldID = ' . $fieldID . ')&&(_mf.locale ' . ($fieldRow['local'] ? ' = "@locale"' : 'IS NULL') . '))'; |
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$metadata->arSelect['this'] .= "\n\t\t" . ',MAX(IF(' . $equal . ', _mf.`' . Field::valueColumn($fieldRow['Type']) . '`, NULL)) as `' . $fieldName . '`'; |
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} |
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// Store metadata by entity identifier |
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$metadataCollection[$structureRow['StructureID']] = $metadata; |
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// Store global collection |
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self::$metadata[$structureRow['StructureID']] = $metadata; |
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} |
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return $metadataCollection; |
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} |
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/** |
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* Get entity fields. |
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* |
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* @param int $entityID Entity identifier |
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* |
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* @return array Collection of entity fields |
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*/ |
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protected function getEntityFields($entityID) |
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{ |
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$return = array(); |
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// TODO: Optimize queries make one single query with only needed data |
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foreach ($this->database->fetch('SELECT * FROM `structurefield` WHERE `StructureID` = "' . $entityID . '" AND `Active` = "1"') as $fieldStructureRow) { |
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foreach ($this->database->fetch('SELECT * FROM `field` WHERE `FieldID` = "' . $fieldStructureRow['FieldID'] . '"') as $fieldRow) { |
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$return[$fieldRow['FieldID']] = $fieldRow; |
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} |
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} |
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return $return; |
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} |
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/** |
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* Find entity parent identifier. |
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* |
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* @param int $entityID Entity identifier |
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* |
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* @return null|int Parent entity identifier |
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*/ |
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public function getParentEntity($entityID) |
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{ |
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$parentData = $this->database->fetch(' |
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SELECT * |
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FROM structure_relation as sm |
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JOIN structure as s ON s.StructureID = sm.parent_id |
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WHERE sm.child_id = "' . $entityID . '" |
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AND s.StructureID != "' . $entityID . '" |
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'); |
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// Get parent entity identifier |
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return count($parentData) ? $parentData[0]['StructureID'] : null; |
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} |
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/** |
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* Get child entities by parent identifier. |
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* |
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* @param int $parentId Parent entity identifier |
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* |
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* @return array Get collection of child navigation objects |
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*/ |
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protected function getChildEntities($parentId) |
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{ |
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return $this->database->fetch(' |
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SELECT * FROM `structure` |
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WHERE `Active` = "1" AND `ParentID` = ' . $parentId . ' |
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ORDER BY `ParentID` ASC |
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'); |
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} |
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/** |
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* Get virtual entities from database by their type. |
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* |
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* @param int $type Virtual entity type |
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* |
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* @return array Get collection of navigation objects |
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*/ |
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protected function getVirtualEntities($type = 0) |
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{ |
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return $this->database->fetch(' |
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SELECT * FROM `structure` |
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WHERE `Active` = "1" AND `Type` = "' . $type . '" |
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ORDER BY `ParentID` ASC |
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'); |
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} |
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} |
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//[PHPCOMPRESSOR(remove,end)] |
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_function
expects aPost
object, and outputs the author of the post. The base classPost
returns a simple string and outputting a simple string will work just fine. However, the child classBlogPost
which is a sub-type ofPost
instead decided to return anobject
, and is therefore violating the SOLID principles. If aBlogPost
were passed tomy_function
, PHP would not complain, but ultimately fail when executing thestrtoupper
call in its body.