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<?php

/**

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.Model.Behavior

 * @since         CakePHP(tm) v 1.2.0.4525

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('ModelBehavior', 'Model');

App::uses('I18n', 'I18n');

App::uses('I18nModel', 'Model');

/**

 * Translate behavior

 *

 * @package       Cake.Model.Behavior

 * @link http://book.cakephp.org/2.0/en/core-libraries/behaviors/translate.html

 */

class TranslateBehavior extends ModelBehavior {

/**

 * Used for runtime configuration of model

 *

 * @var array

 */

	public $runtime = array();

/**

 * Stores the joinTable object for generating joins.

 *

 * @var object

 */

	protected $_joinTable;

/**

 * Stores the runtime model for generating joins.

 *

 * @var Model

 */

	protected $_runtimeModel;

/**

 * Callback

 *

 * $config for TranslateBehavior should be

 * array('fields' => array('field_one',

 * 'field_two' => 'FieldAssoc', 'field_three'))

 *

 * With above example only one permanent hasMany will be joined (for field_two

 * as FieldAssoc)

 *

 * $config could be empty - and translations configured dynamically by

 * bindTranslation() method

 *

 * @param Model $Model Model the behavior is being attached to.

 * @param array $config Array of configuration information.

 * @return mixed

 */

	public function setup(Model $Model, $config = array()) {

		$db = ConnectionManager::getDataSource($Model->useDbConfig);

		if (!$db->connected) {

			trigger_error(

				__d('cake_dev', 'Datasource %s for TranslateBehavior of model %s is not connected', $Model->useDbConfig, $Model->alias),

				E_USER_ERROR

			);

			return false;

		}

		$this->settings[$Model->alias] = array();

		$this->runtime[$Model->alias] = array('fields' => array());

		$this->translateModel($Model);

		return $this->bindTranslation($Model, $config, false);

	}

/**

 * Cleanup Callback unbinds bound translations and deletes setting information.

 *

 * @param Model $Model Model being detached.

 * @return void

 */

	public function cleanup(Model $Model) {

		$this->unbindTranslation($Model);

		unset($this->settings[$Model->alias]);

		unset($this->runtime[$Model->alias]);

	}

/**

 * beforeFind Callback

 *

 * @param Model $Model Model find is being run on.

 * @param array $query Array of Query parameters.

 * @return array Modified query

 */

	public function beforeFind(Model $Model, $query) {

		$this->runtime[$Model->alias]['virtualFields'] = $Model->virtualFields;

		$locale = $this->_getLocale($Model);

		if (empty($locale)) {

			return $query;

		}

		$db = $Model->getDataSource();

		$RuntimeModel = $this->translateModel($Model);

		if (!empty($RuntimeModel->tablePrefix)) {

			$tablePrefix = $RuntimeModel->tablePrefix;

		} else {

			$tablePrefix = $db->config['prefix'];

		}

		$joinTable = new StdClass();

		$joinTable->tablePrefix = $tablePrefix;

		$joinTable->table = $RuntimeModel->table;

		$joinTable->schemaName = $RuntimeModel->getDataSource()->getSchemaName();

		$this->_joinTable = $joinTable;

		$this->_runtimeModel = $RuntimeModel;

		if (is_string($query['fields']) && "COUNT(*) AS {$db->name('count')}" == $query['fields']) {

			$query['fields'] = "COUNT(DISTINCT({$db->name($Model->escapeField())})) {$db->alias}count";

			$query['joins'][] = array(

				'type' => 'INNER',

				'alias' => $RuntimeModel->alias,

				'table' => $joinTable,

				'conditions' => array(

					$Model->escapeField() => $db->identifier($RuntimeModel->escapeField('foreign_key')),

					$RuntimeModel->escapeField('model') => $Model->name,

					$RuntimeModel->escapeField('locale') => $locale

				)

			);

			$conditionFields = $this->_checkConditions($Model, $query);

			foreach ($conditionFields as $field) {

				$query = $this->_addJoin($Model, $query, $field, $field, $locale);

			}

			unset($this->_joinTable, $this->_runtimeModel);

			return $query;

		}

		$fields = array_merge(

			$this->settings[$Model->alias],

			$this->runtime[$Model->alias]['fields']

		);

		$addFields = array();

		if (empty($query['fields'])) {

			$addFields = $fields;

		} elseif (is_array($query['fields'])) {

			$isAllFields = (

				in_array($Model->alias . '.' . '*', $query['fields']) ||

				in_array($Model->escapeField('*'), $query['fields'])

			);

			foreach ($fields as $key => $value) {

				$field = (is_numeric($key)) ? $value : $key;

				if (

					$isAllFields ||

					in_array($Model->alias . '.' . $field, $query['fields']) ||

					in_array($field, $query['fields'])

				) {

					$addFields[] = $field;

				}

			}

		}

		$this->runtime[$Model->alias]['virtualFields'] = $Model->virtualFields;

		if ($addFields) {

			foreach ($addFields as $_f => $field) {

				$aliasField = is_numeric($_f) ? $field : $_f;

				foreach (array($aliasField, $Model->alias . '.' . $aliasField) as $_field) {

					$key = array_search($_field, (array)$query['fields']);

					if ($key !== false) {

						unset($query['fields'][$key]);

					}

				}

				$query = $this->_addJoin($Model, $query, $field, $aliasField, $locale);

			}

		}

		$this->runtime[$Model->alias]['beforeFind'] = $addFields;

		unset($this->_joinTable, $this->_runtimeModel);

		return $query;

	}

/**

 * Check a query's conditions for translated fields.

 * Return an array of translated fields found in the conditions.

 *

 * @param Model $Model The model being read.

 * @param array $query The query array.

 * @return array The list of translated fields that are in the conditions.

 */

	protected function _checkConditions(Model $Model, $query) {

		$conditionFields = array();

		if (empty($query['conditions']) || (!empty($query['conditions']) && !is_array($query['conditions']))) {

			return $conditionFields;

		}

		foreach ($query['conditions'] as $col => $val) {

			foreach ($this->settings[$Model->alias] as $field => $assoc) {

				if (is_numeric($field)) {

					$field = $assoc;

				}

				if (strpos($col, $field) !== false) {

					$conditionFields[] = $field;

				}

			}

		}

		return $conditionFields;

	}

/**

 * Appends a join for translated fields.

 *

 * @param Model $Model The model being worked on.

 * @param array $query The query array to append a join to.

 * @param string $field The field name being joined.

 * @param string $aliasField The aliased field name being joined.

 * @param string|array $locale The locale(s) having joins added.

 * @return array The modified query

 */

	protected function _addJoin(Model $Model, $query, $field, $aliasField, $locale) {

		$db = ConnectionManager::getDataSource($Model->useDbConfig);

		$RuntimeModel = $this->_runtimeModel;

		$joinTable = $this->_joinTable;

		$aliasVirtual = "i18n_{$field}";

		$alias = "I18n__{$field}";

		if (is_array($locale)) {

			foreach ($locale as $_locale) {

				$aliasVirtualLocale = "{$aliasVirtual}_{$_locale}";

				$aliasLocale = "{$alias}__{$_locale}";

				$Model->virtualFields[$aliasVirtualLocale] = "{$aliasLocale}.content";

				if (!empty($query['fields']) && is_array($query['fields'])) {

					$query['fields'][] = $aliasVirtualLocale;

				}

				$query['joins'][] = array(

					'type' => 'LEFT',

					'alias' => $aliasLocale,

					'table' => $joinTable,

					'conditions' => array(

						$Model->escapeField() => $db->identifier("{$aliasLocale}.foreign_key"),

						"{$aliasLocale}.model" => $Model->name,

						"{$aliasLocale}.{$RuntimeModel->displayField}" => $aliasField,

						"{$aliasLocale}.locale" => $_locale

					)

				);

			}

		} else {

			$Model->virtualFields[$aliasVirtual] = "{$alias}.content";

			if (!empty($query['fields']) && is_array($query['fields'])) {

				$query['fields'][] = $aliasVirtual;

			}

			$query['joins'][] = array(

				'type' => 'INNER',

				'alias' => $alias,

				'table' => $joinTable,

				'conditions' => array(

					"{$Model->alias}.{$Model->primaryKey}" => $db->identifier("{$alias}.foreign_key"),

					"{$alias}.model" => $Model->name,

					"{$alias}.{$RuntimeModel->displayField}" => $aliasField,

					"{$alias}.locale" => $locale

				)

			);

		}

		return $query;

	}

/**

 * afterFind Callback

 *

 * @param Model $Model Model find was run on

 * @param array $results Array of model results.

 * @param boolean $primary Did the find originate on $model.

 * @return array Modified results

 */

	public function afterFind(Model $Model, $results, $primary = false) {

		$Model->virtualFields = $this->runtime[$Model->alias]['virtualFields'];

		$this->runtime[$Model->alias]['virtualFields'] = $this->runtime[$Model->alias]['fields'] = array();

		$locale = $this->_getLocale($Model);

		if (empty($locale) || empty($results) || empty($this->runtime[$Model->alias]['beforeFind'])) {

			return $results;

		}

		$beforeFind = $this->runtime[$Model->alias]['beforeFind'];

		foreach ($results as $key => &$row) {

			$results[$key][$Model->alias]['locale'] = (is_array($locale)) ? current($locale) : $locale;

			foreach ($beforeFind as $_f => $field) {

				$aliasField = is_numeric($_f) ? $field : $_f;

				$aliasVirtual = "i18n_{$field}";

				if (is_array($locale)) {

					foreach ($locale as $_locale) {

						$aliasVirtualLocale = "{$aliasVirtual}_{$_locale}";

						if (!isset($row[$Model->alias][$aliasField]) && !empty($row[$Model->alias][$aliasVirtualLocale])) {

							$row[$Model->alias][$aliasField] = $row[$Model->alias][$aliasVirtualLocale];

							$row[$Model->alias]['locale'] = $_locale;

						}

						unset($row[$Model->alias][$aliasVirtualLocale]);

					}

					if (!isset($row[$Model->alias][$aliasField])) {

						$row[$Model->alias][$aliasField] = '';

					}

				} else {

					$value = '';

					if (!empty($row[$Model->alias][$aliasVirtual])) {

						$value = $row[$Model->alias][$aliasVirtual];

					}

					$row[$Model->alias][$aliasField] = $value;

					unset($row[$Model->alias][$aliasVirtual]);

				}

			}

		}

		return $results;

	}

/**

 * beforeValidate Callback

 *

 * @param Model $Model Model invalidFields was called on.

 * @param array $options Options passed from Model::save().

 * @return boolean

 * @see Model::save()

 */

	public function beforeValidate(Model $Model, $options = array()) {

		unset($this->runtime[$Model->alias]['beforeSave']);

		$this->_setRuntimeData($Model);

		return true;

	}

/**

 * beforeSave callback.

 *

 * Copies data into the runtime property when `$options['validate']` is

 * disabled. Or the runtime data hasn't been set yet.

 *

 * @param Model $Model Model save was called on.

 * @param array $options Options passed from Model::save().

 * @return boolean true.

 * @see Model::save()

 */

	public function beforeSave(Model $Model, $options = array()) {

		if (isset($options['validate']) && !$options['validate']) {

			unset($this->runtime[$Model->alias]['beforeSave']);

		}

		if (isset($this->runtime[$Model->alias]['beforeSave'])) {

			return true;

		}

		$this->_setRuntimeData($Model);

		return true;

	}

/**

 * Sets the runtime data.

 *

 * Used from beforeValidate() and beforeSave() for compatibility issues,

 * and to allow translations to be persisted even when validation

 * is disabled.

 *

 * @param Model $Model

 * @return void

 */

	protected function _setRuntimeData(Model $Model) {

		$locale = $this->_getLocale($Model);

		if (empty($locale)) {

			return true;

		}

		$fields = array_merge($this->settings[$Model->alias], $this->runtime[$Model->alias]['fields']);

		$tempData = array();

		foreach ($fields as $key => $value) {

			$field = (is_numeric($key)) ? $value : $key;

			if (isset($Model->data[$Model->alias][$field])) {

				$tempData[$field] = $Model->data[$Model->alias][$field];

				if (is_array($Model->data[$Model->alias][$field])) {

					if (is_string($locale) && !empty($Model->data[$Model->alias][$field][$locale])) {

						$Model->data[$Model->alias][$field] = $Model->data[$Model->alias][$field][$locale];

					} else {

						$values = array_values($Model->data[$Model->alias][$field]);

						$Model->data[$Model->alias][$field] = $values[0];

					}

				}

			}

		}

		$this->runtime[$Model->alias]['beforeSave'] = $tempData;

	}

/**

 * Restores model data to the original data.

 * This solves issues with saveAssociated and validate = first.

 *

 * @param Model $model

 * @return void

 */

	public function afterValidate(Model $Model) {

		$Model->data[$Model->alias] = array_merge(

			$Model->data[$Model->alias],

			$this->runtime[$Model->alias]['beforeSave']

		);

		return true;

	}

/**

 * afterSave Callback

 *

 * @param Model $Model Model the callback is called on

 * @param boolean $created Whether or not the save created a record.

 * @param array $options Options passed from Model::save().

 * @return void

 */

	public function afterSave(Model $Model, $created, $options = array()) {

		if (!isset($this->runtime[$Model->alias]['beforeValidate']) && !isset($this->runtime[$Model->alias]['beforeSave'])) {

			return true;

		}

		if (isset($this->runtime[$Model->alias]['beforeValidate'])) {

			$tempData = $this->runtime[$Model->alias]['beforeValidate'];

		} else {

			$tempData = $this->runtime[$Model->alias]['beforeSave'];

		}

		unset($this->runtime[$Model->alias]['beforeValidate'], $this->runtime[$Model->alias]['beforeSave']);

		$conditions = array('model' => $Model->name, 'foreign_key' => $Model->id);

		$RuntimeModel = $this->translateModel($Model);

		if ($created) {

			$tempData = $this->_prepareTranslations($Model, $tempData);

		}

		$locale = $this->_getLocale($Model);

		foreach ($tempData as $field => $value) {

			unset($conditions['content']);

			$conditions['field'] = $field;

			if (is_array($value)) {

				$conditions['locale'] = array_keys($value);

			} else {

				$conditions['locale'] = $locale;

				if (is_array($locale)) {

					$value = array($locale[0] => $value);

				} else {

					$value = array($locale => $value);

				}

			}

			$translations = $RuntimeModel->find('list', array(

				'conditions' => $conditions,

				'fields' => array(

					$RuntimeModel->alias . '.locale',

					$RuntimeModel->alias . '.id'

				)

			));

			foreach ($value as $_locale => $_value) {

				$RuntimeModel->create();

				$conditions['locale'] = $_locale;

				$conditions['content'] = $_value;

				if (array_key_exists($_locale, $translations)) {

					$RuntimeModel->save(array(

						$RuntimeModel->alias => array_merge(

							$conditions, array('id' => $translations[$_locale])

						)

					));

				} else {

					$RuntimeModel->save(array($RuntimeModel->alias => $conditions));

				}

			}

		}

	}

/**

 * Prepares the data to be saved for translated records.

 * Add blank fields, and populates data for multi-locale saves.

 *

 * @param Model $Model Model instance

 * @param array $data The sparse data that was provided.

 * @return array The fully populated data to save.

 */

	protected function _prepareTranslations(Model $Model, $data) {

		$fields = array_merge($this->settings[$Model->alias], $this->runtime[$Model->alias]['fields']);

		$locales = array();

		foreach ($data as $key => $value) {

			if (is_array($value)) {

				$locales = array_merge($locales, array_keys($value));

			}

		}

		$locales = array_unique($locales);

		$hasLocales = count($locales) > 0;

		foreach ($fields as $key => $field) {

			if (!is_numeric($key)) {

				$field = $key;

			}

			if ($hasLocales && !isset($data[$field])) {

				$data[$field] = array_fill_keys($locales, '');

			} elseif (!isset($data[$field])) {

				$data[$field] = '';

			}

		}

		return $data;

	}

/**

 * afterDelete Callback

 *

 * @param Model $Model Model the callback was run on.

 * @return void

 */

	public function afterDelete(Model $Model) {

		$RuntimeModel = $this->translateModel($Model);

		$conditions = array('model' => $Model->name, 'foreign_key' => $Model->id);

		$RuntimeModel->deleteAll($conditions);

	}

/**

 * Get selected locale for model

 *

 * @param Model $Model Model the locale needs to be set/get on.

 * @return mixed string or false

 */

	protected function _getLocale(Model $Model) {

		if (!isset($Model->locale) || $Model->locale === null) {

			$I18n = I18n::getInstance();

			$I18n->l10n->get(Configure::read('Config.language'));

			$Model->locale = $I18n->l10n->locale;

		}

		return $Model->locale;

	}

/**

 * Get instance of model for translations.

 *

 * If the model has a translateModel property set, this will be used as the class

 * name to find/use. If no translateModel property is found 'I18nModel' will be used.

 *

 * @param Model $Model Model to get a translatemodel for.

 * @return Model

 */

	public function translateModel(Model $Model) {

		if (!isset($this->runtime[$Model->alias]['model'])) {

			if (!isset($Model->translateModel) || empty($Model->translateModel)) {

				$className = 'I18nModel';

			} else {

				$className = $Model->translateModel;

			}

			$this->runtime[$Model->alias]['model'] = ClassRegistry::init($className);

		}

		if (!empty($Model->translateTable) && $Model->translateTable !== $this->runtime[$Model->alias]['model']->useTable) {

			$this->runtime[$Model->alias]['model']->setSource($Model->translateTable);

		} elseif (empty($Model->translateTable) && empty($Model->translateModel)) {

			$this->runtime[$Model->alias]['model']->setSource('i18n');

		}

		return $this->runtime[$Model->alias]['model'];

	}

/**

 * Bind translation for fields, optionally with hasMany association for

 * fake field.

 *

 * *Note* You should avoid binding translations that overlap existing model properties.

 * This can cause un-expected and un-desirable behavior.

 *

 * @param Model $Model instance of model

 * @param string|array $fields string with field or array(field1, field2=>AssocName, field3)

 * @param boolean $reset Leave true to have the fields only modified for the next operation.

 *   if false the field will be added for all future queries.

 * @return boolean

 * @throws CakeException when attempting to bind a translating called name. This is not allowed

 *   as it shadows Model::$name.

 */

	public function bindTranslation(Model $Model, $fields, $reset = true) {

		if (is_string($fields)) {

			$fields = array($fields);

		}

		$associations = array();

		$RuntimeModel = $this->translateModel($Model);

		$default = array('className' => $RuntimeModel->alias, 'foreignKey' => 'foreign_key');

		foreach ($fields as $key => $value) {

			if (is_numeric($key)) {

				$field = $value;

				$association = null;

			} else {

				$field = $key;

				$association = $value;

			}

			if ($association === 'name') {

				throw new CakeException(

					__d('cake_dev', 'You cannot bind a translation named "name".')

				);

			}

			$this->_removeField($Model, $field);

			if ($association === null) {

				if ($reset) {

					$this->runtime[$Model->alias]['fields'][] = $field;

				} else {

					$this->settings[$Model->alias][] = $field;

				}

			} else {

				if ($reset) {

					$this->runtime[$Model->alias]['fields'][$field] = $association;

				} else {

					$this->settings[$Model->alias][$field] = $association;

				}

				foreach (array('hasOne', 'hasMany', 'belongsTo', 'hasAndBelongsToMany') as $type) {

					if (isset($Model->{$type}[$association]) || isset($Model->__backAssociation[$type][$association])) {

						trigger_error(

							__d('cake_dev', 'Association %s is already bound to model %s', $association, $Model->alias),

							E_USER_ERROR

						);

						return false;

					}

				}

				$associations[$association] = array_merge($default, array('conditions' => array(

					'model' => $Model->name,

					$RuntimeModel->displayField => $field

				)));

			}

		}

		if (!empty($associations)) {

			$Model->bindModel(array('hasMany' => $associations), $reset);

		}

		return true;

	}

/**

 * Update runtime setting for a given field.

 *

 * @param Model $Model Model instance

 * @param string $field The field to update.

 * @return void

 */

	protected function _removeField(Model $Model, $field) {

		if (array_key_exists($field, $this->settings[$Model->alias])) {

			unset($this->settings[$Model->alias][$field]);

		} elseif (in_array($field, $this->settings[$Model->alias])) {

			$this->settings[$Model->alias] = array_merge(array_diff($this->settings[$Model->alias], array($field)));

		}

		if (array_key_exists($field, $this->runtime[$Model->alias]['fields'])) {

			unset($this->runtime[$Model->alias]['fields'][$field]);

		} elseif (in_array($field, $this->runtime[$Model->alias]['fields'])) {

			$this->runtime[$Model->alias]['fields'] = array_merge(array_diff($this->runtime[$Model->alias]['fields'], array($field)));

		}

	}

/**

 * Unbind translation for fields, optionally unbinds hasMany association for

 * fake field

 *

 * @param Model $Model instance of model

 * @param string|array $fields string with field, or array(field1, field2=>AssocName, field3), or null for

 *    unbind all original translations

 * @return boolean

 */

	public function unbindTranslation(Model $Model, $fields = null) {

		if (empty($fields) && empty($this->settings[$Model->alias])) {

			return false;

		}

		if (empty($fields)) {

			return $this->unbindTranslation($Model, $this->settings[$Model->alias]);

		}

		if (is_string($fields)) {

			$fields = array($fields);

		}

		$associations = array();

		foreach ($fields as $key => $value) {

			if (is_numeric($key)) {

				$field = $value;

				$association = null;

			} else {

				$field = $key;

				$association = $value;

			}

			$this->_removeField($Model, $field);

			if ($association !== null && (isset($Model->hasMany[$association]) || isset($Model->__backAssociation['hasMany'][$association]))) {

				$associations[] = $association;

			}

		}

		if (!empty($associations)) {

			$Model->unbindModel(array('hasMany' => $associations), false);

		}

		return true;

	}

}