711 lines
23 KiB
PHP
711 lines
23 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Wrapper for Memcached_DataObject which knows its own schema definition.
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* Builds its own damn settings from a schema definition.
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*
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* @package GNUsocial
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* @author Brion Vibber <brion@status.net>
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* @copyright 2010 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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defined('GNUSOCIAL') || die();
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abstract class Managed_DataObject extends Memcached_DataObject
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{
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/**
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* The One True Thingy that must be defined and declared.
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*/
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public static function schemaDef()
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{
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throw new MethodNotImplementedException(__METHOD__);
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}
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/**
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* Get an instance by key
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*
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* @param string $k Key to use to lookup (usually 'id' for this class)
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* @param mixed $v Value to lookup
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*
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* @return get_called_class() object if found, or null for no hits
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*
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*/
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public static function getKV($k, $v = null)
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{
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return parent::getClassKV(get_called_class(), $k, $v);
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}
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/**
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* Get an instance by compound key
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*
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* This is a utility method to get a single instance with a given set of
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* key-value pairs. Usually used for the primary key for a compound key; thus
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* the name.
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*
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* @param array $kv array of key-value mappings
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*
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* @return get_called_class() object if found, or null for no hits
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*
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*/
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public static function pkeyGet(array $kv)
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{
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return parent::pkeyGetClass(get_called_class(), $kv);
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}
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public static function pkeyCols()
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{
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return parent::pkeyColsClass(get_called_class());
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}
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/**
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* Get multiple items from the database by key
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*
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* @param string $keyCol name of column for key
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* @param array $keyVals key values to fetch
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* @param boolean $skipNulls return only non-null results?
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*
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* @return array Array of objects, in order
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*/
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public static function multiGet($keyCol, array $keyVals, $skipNulls = true)
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{
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return parent::multiGetClass(get_called_class(), $keyCol, $keyVals, $skipNulls);
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}
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/**
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* Get multiple items from the database by key
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*
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* @param string $keyCol name of column for key
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* @param array $keyVals key values to fetch
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* @param array $otherCols Other columns to hold fixed
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*
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* @return array Array mapping $keyVals to objects, or null if not found
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*/
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public static function pivotGet($keyCol, array $keyVals, array $otherCols = [])
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{
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return parent::pivotGetClass(get_called_class(), $keyCol, $keyVals, $otherCols);
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}
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/**
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* Get a multi-instance object
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*
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* This is a utility method to get multiple instances with a given set of
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* values for a specific column.
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*
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* @param string $keyCol key column name
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* @param array $keyVals array of key values
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*
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* @return get_called_class() object with multiple instances if found,
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* Exception is thrown when no entries are found.
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*
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*/
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public static function listFind($keyCol, array $keyVals)
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{
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return parent::listFindClass(get_called_class(), $keyCol, $keyVals);
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}
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/**
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* Get a multi-instance object separated into an array
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*
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* This is a utility method to get multiple instances with a given set of
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* values for a specific key column. Usually used for the primary key when
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* multiple values are desired. Result is an array.
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*
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* @param string $keyCol key column name
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* @param array $keyVals array of key values
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*
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* @return array with an get_called_class() object for each $keyVals entry
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*
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*/
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public static function listGet($keyCol, array $keyVals)
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{
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return parent::listGetClass(get_called_class(), $keyCol, $keyVals);
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}
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/**
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* get/set an associative array of table columns
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*
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* @access public
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* @return array (associative)
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*/
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public function table()
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{
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$table = static::schemaDef();
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return array_map(array($this, 'columnBitmap'), $table['fields']);
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}
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/**
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* get/set an array of table primary keys
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*
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* Key info is pulled from the table definition array.
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*
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* @access private
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* @return array
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*/
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public function keys()
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{
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return array_keys($this->keyTypes());
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}
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/**
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* Get a sequence key
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*
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* Returns the first serial column defined in the table, if any.
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*
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* @access private
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* @return array (column,use_native,sequence_name)
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*/
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public function sequenceKey()
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{
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$table = static::schemaDef();
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foreach ($table['fields'] as $name => $column) {
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if ($column['type'] == 'serial') {
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// We have a serial/autoincrement column.
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// Declare it to be a native sequence!
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return array($name, true, false);
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}
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}
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// No sequence key on this table.
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return array(false, false, false);
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}
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/**
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* Return key definitions for DB_DataObject and Memcache_DataObject.
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*
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* DB_DataObject needs to know about keys that the table has; this function
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* defines them.
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*
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* @return array key definitions
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*/
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public function keyTypes()
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{
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$table = static::schemaDef();
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$keys = array();
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if (!empty($table['unique keys'])) {
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foreach ($table['unique keys'] as $idx => $fields) {
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foreach ($fields as $name) {
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$keys[$name] = 'U';
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}
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}
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}
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if (!empty($table['primary key'])) {
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foreach ($table['primary key'] as $name) {
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$keys[$name] = 'K';
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}
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}
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return $keys;
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}
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/**
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* Build the appropriate DB_DataObject bitfield map for this field.
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*
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* @param array $column
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* @return int
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*/
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public function columnBitmap($column)
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{
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$type = $column['type'];
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// For quoting style...
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$intTypes = [
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'int',
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'float',
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'serial',
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'numeric'
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];
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if (in_array($type, $intTypes)) {
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$style = DB_DATAOBJECT_INT;
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} else {
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$style = DB_DATAOBJECT_STR;
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}
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// Data type formatting style...
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$formatStyles = [
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'blob' => DB_DATAOBJECT_BLOB,
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'text' => DB_DATAOBJECT_TXT,
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'bool' => DB_DATAOBJECT_BOOL,
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'date' => DB_DATAOBJECT_DATE,
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'time' => DB_DATAOBJECT_TIME,
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'datetime' => DB_DATAOBJECT_DATE | DB_DATAOBJECT_TIME,
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];
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if (isset($formatStyles[$type])) {
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$style |= $formatStyles[$type];
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}
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// Nullable?
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if (!empty($column['not null'])) {
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$style |= DB_DATAOBJECT_NOTNULL;
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}
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return $style;
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}
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public function links()
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{
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$links = array();
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$table = static::schemaDef();
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foreach ($table['foreign keys'] as $keyname => $keydef) {
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if (count($keydef) == 2 && is_string($keydef[0]) && is_array($keydef[1]) && count($keydef[1]) == 1) {
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if (isset($keydef[1][0])) {
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$links[$keydef[1][0]] = $keydef[0].':'.$keydef[1][1];
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}
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}
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}
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return $links;
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}
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/**
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* Return a list of all primary/unique keys / vals that will be used for
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* caching. This will understand compound unique keys, which
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* Memcached_DataObject doesn't have enough info to handle properly.
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*
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* @return array of strings
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* @throws MethodNotImplementedException
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* @throws ServerException
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*/
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public function _allCacheKeys()
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{
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$table = static::schemaDef();
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$ckeys = array();
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if (!empty($table['unique keys'])) {
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$keyNames = $table['unique keys'];
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foreach ($keyNames as $idx => $fields) {
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$val = array();
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foreach ($fields as $name) {
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$val[$name] = self::valueString($this->$name);
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}
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$ckeys[] = self::multicacheKey($this->tableName(), $val);
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}
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}
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if (!empty($table['primary key'])) {
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$fields = $table['primary key'];
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$val = array();
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foreach ($fields as $name) {
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$val[$name] = self::valueString($this->$name);
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}
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$ckeys[] = self::multicacheKey($this->tableName(), $val);
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}
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return $ckeys;
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}
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public function escapedTableName()
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{
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return common_database_tablename($this->tableName());
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}
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/**
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* Returns an object by looking at the primary key column(s).
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*
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* Will require all primary key columns to be defined in an associative array
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* and ignore any keys which are not part of the primary key.
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*
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* Will NOT accept NULL values as part of primary key.
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*
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* @param array $vals Must match all primary key columns for the dataobject.
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*
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* @return Managed_DataObject of the get_called_class() type
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* @throws NoResultException if no object with that primary key
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*/
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public static function getByPK(array $vals)
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{
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$classname = get_called_class();
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$pkey = static::pkeyCols();
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if (is_null($pkey)) {
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throw new ServerException("Failed to get primary key columns for class '{$classname}'");
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}
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$object = new $classname();
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foreach ($pkey as $col) {
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if (!array_key_exists($col, $vals)) {
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throw new ServerException("Missing primary key column '{$col}' for ".get_called_class()." among provided keys: ".implode(',', array_keys($vals)));
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} elseif (is_null($vals[$col])) {
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throw new ServerException("NULL values not allowed in getByPK for column '{$col}'");
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}
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$object->$col = $vals[$col];
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}
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if (!$object->find(true)) {
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throw new NoResultException($object);
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}
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return $object;
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}
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/**
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* Returns an object by looking at given unique key columns.
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*
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* Will NOT accept NULL values for a unique key column. Ignores non-key values.
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*
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* @param array $vals All array keys which are set must be non-null.
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*
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* @return Managed_DataObject of the get_called_class() type
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* @throws NoResultException if no object with that primary key
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*/
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public static function getByKeys(array $vals)
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{
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$classname = get_called_class();
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$object = new $classname();
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$keys = $object->keys();
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if (is_null($keys)) {
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throw new ServerException("Failed to get key columns for class '{$classname}'");
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}
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foreach ($keys as $col) {
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if (!array_key_exists($col, $vals)) {
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continue;
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} elseif (is_null($vals[$col])) {
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throw new ServerException("NULL values not allowed in getByKeys for column '{$col}'");
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}
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$object->$col = $vals[$col];
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}
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if (!$object->find(true)) {
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throw new NoResultException($object);
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}
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return $object;
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}
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public static function getByID($id)
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{
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if (!property_exists(get_called_class(), 'id')) {
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throw new ServerException('Trying to get undefined property of dataobject class.');
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}
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if (empty($id)) {
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throw new EmptyPkeyValueException(get_called_class(), 'id');
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}
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// getByPK throws exception if id is null
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// or if the class does not have a single 'id' column as primary key
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return static::getByPK(array('id' => $id));
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}
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public static function getByUri($uri)
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{
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if (!property_exists(get_called_class(), 'uri')) {
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throw new ServerException('Trying to get undefined property of dataobject class.');
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}
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if (empty($uri)) {
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throw new EmptyPkeyValueException(get_called_class(), 'uri');
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}
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$class = get_called_class();
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$obj = new $class();
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$obj->uri = $uri;
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if (!$obj->find(true)) {
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throw new NoResultException($obj);
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}
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return $obj;
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}
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/**
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* Returns an ID, checked that it is set and reasonably valid
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*
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* If this dataobject uses a special id field (not 'id'), just
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* implement your ID getting method in the child class.
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*
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* @return int ID of dataobject
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* @throws Exception (when ID is not available or not set yet)
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*/
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public function getID()
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{
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// FIXME: Make these exceptions more specific (their own classes)
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if (!isset($this->id)) {
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throw new Exception('No ID set.');
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} elseif (empty($this->id)) {
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throw new Exception('Empty ID for object! (not inserted yet?).');
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}
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return intval($this->id);
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}
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/**
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* Check whether the column is NULL in SQL
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*
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* @param string $key column property name
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*
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* @return bool
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*/
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public function isNull(string $key): bool
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{
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if (array_key_exists($key, get_object_vars($this))
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&& is_null($this->$key)) {
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// If there was no fetch, this is a false positive.
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return true;
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} elseif (is_object($this->$key)
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&& $this->$key instanceof DB_DataObject_Cast
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&& $this->$key->type === 'sql') {
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// This is cast to raw SQL, let's see if it's NULL.
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return (strcasecmp($this->$key->value, 'NULL') == 0);
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} elseif (DB_DataObject::_is_null($this, $key)) {
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// DataObject's NULL magic should be disabled,
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// this is just for completeness.
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return true;
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}
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return false;
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}
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/**
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* WARNING: Only use this on Profile and Notice. We should probably do
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* this with traits/"implements" or whatever, but that's over the top
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* right now, I'm just throwing this in here to avoid code duplication
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* in Profile and Notice classes.
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*/
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public function getAliases()
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{
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return array_keys($this->getAliasesWithIDs());
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}
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public function getAliasesWithIDs()
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{
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$aliases = array();
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$aliases[$this->getUri()] = $this->getID();
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try {
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$aliases[$this->getUrl()] = $this->getID();
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} catch (InvalidUrlException $e) {
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// getUrl failed because no valid URL could be returned, just ignore it
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}
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if (common_config('fix', 'fancyurls')) {
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/**
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* Here we add some hacky hotfixes for remote lookups that have been taught the
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* (at least now) wrong URI but it's still obviously the same user. Such as:
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* - https://site.example/user/1 even if the client requests https://site.example/index.php/user/1
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* - https://site.example/user/1 even if the client requests https://site.example//index.php/user/1
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* - https://site.example/index.php/user/1 even if the client requests https://site.example/user/1
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* - https://site.example/index.php/user/1 even if the client requests https://site.example///index.php/user/1
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*/
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foreach ($aliases as $alias=>$id) {
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try {
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// get a "fancy url" version of the alias, even without index.php/
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$alt_url = common_fake_local_fancy_url($alias);
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// store this as well so remote sites can be sure we really are the same profile
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$aliases[$alt_url] = $id;
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} catch (Exception $e) {
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// Apparently we couldn't rewrite that, the $alias was as the function wanted it to be
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}
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try {
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// get a non-"fancy url" version of the alias, i.e. add index.php/
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$alt_url = common_fake_local_nonfancy_url($alias);
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// store this as well so remote sites can be sure we really are the same profile
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$aliases[$alt_url] = $id;
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} catch (Exception $e) {
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// Apparently we couldn't rewrite that, the $alias was as the function wanted it to be
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}
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}
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}
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return $aliases;
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}
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/**
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* Set the attribute defined as "timestamp" to CURRENT_TIMESTAMP.
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* This is hooked in update() and updateWithKeys() to update "modified".
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*
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* @access private
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* @return void
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*/
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private function updateAutoTimestamps(): void
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{
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$table = static::schemaDef();
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foreach ($table['fields'] as $name => $col) {
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if ($col['type'] === 'timestamp'
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&& !array_key_exists('default', $col)
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&& !isset($this->$name)) {
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$this->$name = common_sql_now();
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}
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}
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}
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/**
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* update() won't write key columns, so we have to do it ourselves.
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* This also automatically calls "update" _before_ it sets the keys.
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* FIXME: This only works with single-column primary keys so far! Beware!
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*
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* @param Managed_DataObject $orig Must be "instanceof" $this
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* @param string $pid Primary ID column (no escaping is done on column name!)
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* @return bool|void
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* @throws MethodNotImplementedException
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* @throws ServerException
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*/
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public function updateWithKeys(Managed_DataObject $orig, ?string $pid = null)
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{
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if (!$orig instanceof $this) {
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throw new ServerException('Tried updating a DataObject with a different class than itself.');
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}
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if ($this->N <1) {
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throw new ServerException('DataObject must be the result of a query (N>=1) before updateWithKeys()');
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}
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$this->onUpdateKeys($orig);
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// do it in a transaction
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$this->query('START TRANSACTION');
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// ON UPDATE CURRENT_TIMESTAMP behaviour
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// @fixme Should the value be reverted back if transaction failed?
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$this->updateAutoTimestamps();
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$parts = [];
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foreach ($this->keys() as $k) {
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$v = $this->table()[$k];
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if ($this->$k !== $orig->$k) {
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if (is_object($this->$k) && $this->$k instanceof DB_DataObject_Cast) {
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$value = $this->$k->toString($v, $this->getDatabaseConnection());
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} elseif (DB_DataObject::_is_null($this, $k)) {
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$value = 'NULL';
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} elseif ($v & DB_DATAOBJECT_STR) { // if a string
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$value = $this->_quote((string) $this->$k);
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} else {
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$value = (int) $this->$k;
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}
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$parts[] = "{$k} = {$value}";
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}
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}
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if (count($parts) == 0) {
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// No changes to keys, it's safe to run ->update(...)
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if ($this->update($orig) === false) {
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common_log_db_error($this, 'UPDATE', __FILE__);
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|
// rollback as something bad occurred
|
|
$this->query('ROLLBACK');
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|
throw new ServerException("Could not UPDATE non-keys for {$this->tableName()}");
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|
}
|
|
$orig->decache();
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|
$this->encache();
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|
|
|
// commit our db transaction since we won't reach the COMMIT below
|
|
$this->query('COMMIT');
|
|
// @FIXME return true only if something changed (otherwise 0)
|
|
return true;
|
|
}
|
|
|
|
if ($pid === null) {
|
|
$schema = static::schemaDef();
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|
$pid = $schema['primary key'];
|
|
unset($schema);
|
|
}
|
|
$pidWhere = [];
|
|
foreach ((array) $pid as $pidCol) {
|
|
$pidWhere[] = sprintf('%1$s = %2$s', $pidCol, $this->_quote($orig->$pidCol));
|
|
}
|
|
if (empty($pidWhere)) {
|
|
throw new ServerException('No primary ID column(s) set for updateWithKeys');
|
|
}
|
|
|
|
$qry = sprintf(
|
|
'UPDATE %1$s SET %2$s WHERE %3$s',
|
|
$this->escapedTableName(),
|
|
implode(', ', $parts),
|
|
implode(' AND ', $pidWhere)
|
|
);
|
|
|
|
$result = $this->query($qry);
|
|
if ($result === false) {
|
|
common_log_db_error($this, 'UPDATE', __FILE__);
|
|
// rollback as something bad occurred
|
|
$this->query('ROLLBACK');
|
|
throw new ServerException("Could not UPDATE key fields for {$this->tableName()}");
|
|
}
|
|
|
|
// Update non-keys too, if the previous endeavour worked.
|
|
// The ->update call uses "$this" values for keys, that's why we can't do this until
|
|
// the keys are updated (because they might differ from $orig and update the wrong entries).
|
|
if ($this->update($orig) === false) {
|
|
common_log_db_error($this, 'UPDATE', __FILE__);
|
|
// rollback as something bad occurred
|
|
$this->query('ROLLBACK');
|
|
throw new ServerException("Could not UPDATE non-keys for {$this->tableName()}");
|
|
}
|
|
$orig->decache();
|
|
$this->encache();
|
|
|
|
// commit our db transaction
|
|
$this->query('COMMIT');
|
|
// @FIXME return true only if something changed (otherwise 0)
|
|
return $result;
|
|
}
|
|
|
|
public static function beforeSchemaUpdate()
|
|
{
|
|
// NOOP
|
|
}
|
|
|
|
public static function newUri(Profile $actor, Managed_DataObject $object, $created = null)
|
|
{
|
|
if (is_null($created)) {
|
|
$created = common_sql_now();
|
|
}
|
|
return TagURI::mint(
|
|
strtolower(get_called_class()) . ':%d:%s:%d:%s',
|
|
$actor->getID(),
|
|
ActivityUtils::resolveUri($object->getObjectType(), true),
|
|
$object->getID(),
|
|
common_date_iso8601($created)
|
|
);
|
|
}
|
|
|
|
protected function onInsert()
|
|
{
|
|
// NOOP by default
|
|
}
|
|
|
|
protected function onUpdate($dataObject=false)
|
|
{
|
|
// NOOP by default
|
|
}
|
|
|
|
protected function onUpdateKeys(Managed_DataObject $orig)
|
|
{
|
|
// NOOP by default
|
|
}
|
|
|
|
public function insert()
|
|
{
|
|
$this->onInsert();
|
|
$result = parent::insert();
|
|
|
|
// Make this object aware of the changed "modified" attribute.
|
|
// Sets it approximately to the same value as DEFAULT CURRENT_TIMESTAMP
|
|
// just did (@fixme).
|
|
if ($result) {
|
|
$this->updateAutoTimestamps();
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
public function update($dataObject = false)
|
|
{
|
|
$this->onUpdate($dataObject);
|
|
|
|
// ON UPDATE CURRENT_TIMESTAMP behaviour
|
|
// @fixme Should the value be reverted back if transaction failed?
|
|
$this->updateAutoTimestamps();
|
|
|
|
return parent::update($dataObject);
|
|
}
|
|
}
|