372 lines
10 KiB
PHP
372 lines
10 KiB
PHP
<?php defined('SYSPATH') or die('No direct access allowed.');
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/**
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* This class overrides Kohana's ORM
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*
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* This file contains enhancements for Kohana, that should be considered upstream and maybe havent been yet.
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*
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* @package lnApp
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* @category Modifications
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* @author Deon George
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* @copyright (c) 2014 Deon George
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* @license http://dev.leenooks.net/license.html
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*/
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abstract class lnApp_ORM extends Kohana_ORM {
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protected $_table_names_plural = FALSE;
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protected $_model_names_plural = FALSE;
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private $_object_formated = array();
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private $_formated = FALSE;
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protected $_created_column = array('column'=>'date_orig','format'=>TRUE);
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protected $_updated_column = array('column'=>'date_last','format'=>TRUE);
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// Our filters used to display values in a friendly format
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protected $_display_filters = array();
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// Our attributes used in forms.
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protected $_form = array();
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// Our attribute blobs that should be compressed
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protected $_compress_column = array();
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// Our attributes that should be converted to NULL when empty
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protected $_nullifempty = array();
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// Our attribute values that need to be stored as serialized
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protected $_serialize_column = array();
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// If we need to load any sub items on loading this model
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protected $_sub_items = array();
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protected $_sub_items_load = array();
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protected $_sub_items_sorted = FALSE;
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// Whether to show a SystemMessage when a record is saved.
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protected $_save_message = FALSE;
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/**
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* Auto process some data as it comes from the database
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* @see parent::__get()
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*/
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public function __get($column) {
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if (array_key_exists($column,$this->_table_columns)) {
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// If the column is a blob, we'll decode it automatically
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if (
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$this->_table_columns[$column]['data_type'] == 'blob'
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AND in_array($column,$this->_compress_column)
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AND ! is_null($this->_object[$column])
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AND ! isset($this->_changed[$column])
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AND (! isset($this->_table_columns[$column]['auto_convert']) OR ! $this->_table_columns[$column]['auto_convert'])
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) {
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// In case our blob hasnt been saved as one.
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try {
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$this->_object[$column] = $this->_blob($this->_object[$column]);
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}
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catch(Exception $e) {
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HTTP_Exception::factory(501,Kohana_Exception::text($e));
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}
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$this->_table_columns[$column]['auto_convert'] = TRUE;
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}
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// If the column is a serialized object, we'll unserialize it.
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if (
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in_array($column,$this->_serialize_column)
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AND is_string($this->_object[$column])
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AND ! is_null($this->_object[$column])
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AND ! isset($this->_changed[$column])
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AND (! isset($this->_table_columns[$column]['unserialized']) OR ! $this->_table_columns[$column]['unserialized'])
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) {
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// In case our object hasnt been saved as serialized.
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try {
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$this->_object[$column] = unserialize($this->_object[$column]);
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}
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catch(Exception $e) {
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HTTP_Exception::factory(501,Kohana_Exception::text($e));
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}
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$this->_table_columns[$column]['unserialized'] = TRUE;
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}
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}
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return parent::__get($column);
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}
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/**
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* Retrieve and Store DB BLOB data in compressed format.
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*/
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private function _blob($data,$set=FALSE) {
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try {
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return $set ? gzcompress($this->_serialize($data,$set)) : $this->_serialize(gzuncompress($data));
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// Maybe the data isnt compressed?
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} catch (Exception $e) {
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return $this->_serialize($data,$set);
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}
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}
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/**
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* Format fields for display purposes
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*
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* @param string column name
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* @return mixed
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*/
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private function _format() {
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foreach ($this->_display_filters as $column => $formats)
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$this->_object_formated[$column] = $this->run_filter($column,$this->__get($column),array($column=>$formats));
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$this->_formated = TRUE;
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}
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/**
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* Intercept our object load, so that we can load our subitems
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*/
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protected function _load_values(array $values) {
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parent::_load_values($values);
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$sort = FALSE;
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if ($this->_loaded AND $this->_sub_items_load AND count($this->_sub_items_load) == 1)
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foreach ($this->_sub_items_load as $item => $sort)
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$this->_sub_items = $this->$item->find_all()->as_array();
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if ($sort) {
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Sort::MAsort($this->_sub_items,$sort);
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$this->_sub_items_sorted = TRUE;
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}
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return $this;
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}
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/**
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* If a column is marked to be nullified if it is empty, this is where it is done.
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*/
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private function _nullifempty(array $array) {
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foreach ($array as $k=>$v) {
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if (is_array($v)) {
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if (is_null($x=$this->_nullifempty($v)))
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unset($array[$k]);
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else
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$array[$k] = $x;
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} elseif (! $v AND $v !== 0 AND $v !== '0')
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unset($array[$k]);
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}
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return count($array) ? $array : NULL;
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}
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/**
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* Try and (un)serialize our data, and if it fails, just return it.
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*/
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private function _serialize($data,$set=FALSE) {
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try {
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return $set ? serialize($data) : unserialize($data);
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// Maybe the data serialized?
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} catch (Exception $e) {
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return $data;
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}
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}
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/**
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* Overrides Kohana cache so that it can be globally disabled.
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*/
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public function cached($lifetime=NULL) {
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return $this->_db->caching($this->_table_name) ? parent::cached($lifetime) : $this;
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}
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public function clear() {
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$this->_formated = FALSE;
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$this->_object_formated = array();
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return parent::clear();
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}
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/**
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* Return a formated columns, as per the model definition
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*/
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public function display($column) {
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// Trigger a load of the record.
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$value = $this->__get($column);
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// If some of our fields need to be formated for display purposes.
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if (! $this->_formated AND $this->_display_filters)
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$this->_format();
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if (isset($this->_object_formated[$column]))
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return $this->_object_formated[$column];
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else
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return is_array($value) ? join(', ',$value) : $value;
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}
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public function display_filters(array $filters) {
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$this->_display_filters = Arr::merge($this->_display_filters,$filters);
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}
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public function dump() {
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$result = array();
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$result['this'] = $this->object();
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if (isset($this->_sub_items))
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foreach ($this->_sub_items as $o)
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$result['sub'][] = $o->dump();
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return $result;
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}
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/**
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* This function is our AJAX helper, used by module list_autocomplete()
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*/
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public function list_autocomplete($term,$index,$value,array $label,array $limit=array(),array $options=NULL) {
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$result = array();
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$query = empty($options['object']) ? $this : $options['object'];
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foreach ($limit as $w) {
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list($k,$s,$v) = $w;
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$query->and_where($k,$s,$v);
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}
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$c = 0;
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foreach ((empty($options['object']) ? $query->find_all() : $query->execute()) as $o) {
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// If we got here via a DB query, we need to reload our ORM object from the result.
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if (! is_object($o)) {
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if (empty($options['key']))
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throw new Kohana_Exception('Missing key for non object');
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$o = $this->clear()->where($options['key'],'=',$o[$options['key']])->find();
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}
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switch ($index) {
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case 'url':
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if (empty($options['urlprefix']))
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throw new Kohana_Exception('Missing URL Prefix');
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$v = $options['urlprefix'].$o->resolve($value);
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break;
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default: $v = $o->resolve($value);
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}
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$k = '';
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foreach ($label as $k => $details)
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foreach ($details as $lvalue)
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$k = preg_replace('/%s/',$o->resolve($lvalue),$k,1);
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$result[$c++] = array(
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'value'=>$v,
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'label'=>$k,
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);
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}
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return $result;
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}
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/**
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* Return an array of data that can be used in a SELECT statement.
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* The ID and VALUE is defined in the model for the select.
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*/
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public function list_select($blank=FALSE,$object=NULL) {
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$result = array();
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if (is_null($object))
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$object = $this->find_all();
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if ($blank)
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$result[NULL] = '';
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if ($this->_form AND array_intersect(array('id','value'),$this->_form))
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foreach ($object as $o)
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$result[$o->{$this->_form['id']}] = $o->resolve($this->_form['value']);
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return $result;
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}
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/**
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* This function is used so that methods can be called via variables
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*/
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public function resolve($key) {
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eval("\$x = \$this->$key;");
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return $x;
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}
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public function save(Validation $validation=NULL) {
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// Find any fields that have changed, and process them.
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if ($this->_changed)
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foreach ($this->_changed as $c) {
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// Any fields that are blobs, and encode them.
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if (! is_null($this->_object[$c]) AND $this->_table_columns[$c]['data_type'] == 'blob' AND in_array($c,$this->_compress_column)) {
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$this->_object[$c] = $this->_blob($this->_object[$c],TRUE);
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// We need to reset our auto_convert flag
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if (isset($this->_table_columns[$c]['auto_convert']))
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$this->_table_columns[$c]['auto_convert'] = FALSE;
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// Any fields that should be seriailzed, we'll do that.
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} elseif (is_array($this->_object[$c]) AND in_array($c,$this->_serialize_column)) {
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$this->_object[$c] = serialize($this->_object[$c]);
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}
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// Test if the value has still changed
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if ($this->_original_values AND $this->_object[$c] == $this->_original_values[$c])
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unset($this->_changed[$c]);
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}
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parent::save();
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if ($this->saved() AND $this->_save_message AND (PHP_SAPI !== 'cli'))
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SystemMessage::factory()
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->title('Record Updated')
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->type('success')
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->body(sprintf('Record %s:%s Updated',$this->_table_name,$this->id));
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return $this;
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}
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public function subitems() {
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return $this->_sub_items;
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}
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/**
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* Override the Kohana processing so we can null values if required.
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* We override this function, because we do set our own primary key value
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*/
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public function values(array $values, array $expected = NULL) {
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foreach ($values as $k=>$v) {
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// Convert to NULL
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if (in_array($k,$this->_nullifempty)) {
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if (is_array($v))
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$values[$k] = $this->_nullifempty($v);
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elseif (! $v AND $v !== 0 AND $v !== '0')
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$values[$k] = NULL;
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}
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}
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parent::values($values,$expected);
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if (isset($values[$this->_primary_key]))
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$this->{$this->_primary_key} = $values[$this->_primary_key];
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return $this;
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}
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public function what_changed() {
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$result = array();
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foreach ($this->changed() as $k) {
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$result[$k]['old'] = ($x=Arr::get($this->_original_values,$k)) ? $x : serialize($x);
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$result[$k]['new'] = ($x=Arr::get($this->_object,$k)) ? $x : serialize($x);
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}
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return $result;
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}
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}
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?>
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