forked from extern/egroupware
463 lines
13 KiB
PHP
463 lines
13 KiB
PHP
<?php
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/**************************************************************************\
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* phpGroupWare - generalized SQL Storage Object *
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* http://www.phpgroupware.org *
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* Written by Ralf Becker <RalfBecker@outdoor-training.de> *
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* -------------------------------------------- *
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* This program is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU General Public License as published by the *
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* Free Software Foundation; either version 2 of the License, or (at your *
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* option) any later version. *
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\**************************************************************************/
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/* $Id$ */
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/*!
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@class so_sql
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@author ralfbecker
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@abstract generalized SQL Storage Object
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@discussion the class can be used in following ways:
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@discussion 1) by calling the constructor with an app and table-name or
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@discussion 2) by setting the following class-vars in a class derifed from this one
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@discussion Of cause can you derife the class and call the constructor with params.
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@param $table_name need to be set in the derived class to the db-table-name
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@param $autoinc_id db-col-name of autoincrement id or ''
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@param $db_key_cols array of all primary-key-columns in form dbName => internalName
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@discussion the save function does NOT touch any other cols in the table!!!
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@param $db_data_cols array of all data-cols
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@param $debug turns on debug-messages
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@param $empty_on_write string to be written to db if a col-value is '', eg. "''" or 'NULL' (default)
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@param $non_db_cols all cols in data which are not (direct)in the db, for data_merge
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*/
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class so_sql
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{
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var $public_functions = array(
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'init' => True,
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'data_merge' => True,
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'read' => True,
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'save' => True,
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'delete' => True,
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'search' => True,
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);
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var $db,$table_name;
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var $autoinc_id = '';
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var $db_key_cols = array(),$db_data_cols = array(); // key_cols mean primary keys
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var $db_uni_cols = array();
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var $db_cols; // = $db_key_cols + $db_data_cols
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var $non_db_cols = array();
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var $data; // holds the content of all db_cols
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var $debug = 0;
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var $empty_on_write = 'NULL';
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var $non_db_cols = array();
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/*!
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@function so_sql
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@syntax so_sql( $app='',$table='' )
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@author ralfbecker
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@abstract constructor of the class
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@discussion NEED to be called from the constructor of the derived class
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@param $app, $table should be set if table-defs to be read from <app>/setup/tables_current.inc.php
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*/
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function so_sql($app='',$table='')
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{
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$this->db = $GLOBALS['phpgw']->db;
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$this->db_cols = $this->db_key_cols + $this->db_data_cols;
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if ($app && $table)
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{
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$this->setup_table($app,$table);
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}
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$this->init();
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if ($this->debug)
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{
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echo "<p>so_sql('$app','$table')</p>\n";
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_debug_array($this);
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}
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}
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/*!
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@function setup_table
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@syntax setup_table( $app,$table )
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@author ralfbecker
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@abstract reads table-definition from <app>/setup/tables_current.inc.php
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@discussion Does NOT set a different internal-data-name. If you want this, you have to do so
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@discussion in a derifed class !!!
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*/
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function setup_table($app,$table)
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{
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include(PHPGW_SERVER_ROOT . "/$app/setup/tables_current.inc.php");
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if (!isset($phpgw_baseline[$table]))
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{
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echo "<p>Can't find table-definitions for App. '$app', Table '$table' !!!</p>\n";
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exit();
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}
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$this->table_name = $table;
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$table_def = $phpgw_baseline[$table];
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$this->db_key_cols = $this->db_data_cols = $this->db_cols = array();
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$this->autoinc_id = '';
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foreach($table_def['fd'] as $name => $def)
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{
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if (in_array($name,$table_def['pk']))
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{
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$this->db_key_cols[$name] = $name;
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}
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else
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{
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$this->db_data_cols[$name] = $name;
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}
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$this->db_cols[$name] = $name;
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if ($def['type'] == 'auto')
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{
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$this->autoinc_id = $name;
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}
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if (in_array($name,$table_def['uc']))
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{
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$this->db_uni_cols[$name] = $name;
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}
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}
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}
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/*!
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@function so_data_merge
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@syntax so_data_merge( $new )
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@author ralfbecker
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@abstract merges in new values from the given new data-array
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@param $new array in form col => new_value with values to set
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*/
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function data_merge($new)
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{
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if (!is_array($new) || !count($new))
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{
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return;
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}
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foreach($this->db_cols as $db_col => $col)
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{
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if (isset($new[$col]))
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{
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$this->data[$col] = $new[$col];
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}
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}
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foreach($this->non_db_cols as $db_col => $col)
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{
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if (isset($new[$col]))
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{
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$this->data[$col] = $new[$col];
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}
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}
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}
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/*!
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@function db2data
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@abstract changes the data from the db-format to your work-format
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@discussion it gets called everytime when data is read from the db
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@discussion This function needs to be reimplemented in the derived class
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@param $data if given works on that array and returns result, else works on internal data-array
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*/
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function db2data($data=0)
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{
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if ($intern = !is_array($data))
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{
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$data = $this->data;
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}
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// do the necessare changes here
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if ($intern)
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{
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$this->data = $data;
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}
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return $data;
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}
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/*!
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@function data2db
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@abstract changes the data from your work-format to the db-format
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@discussion It gets called everytime when data gets writen into db or on keys for db-searches
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@discussion this needs to be reimplemented in the derived class
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@param $data if given works on that array and returns result, else works on internal data-array
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*/
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function data2db($data=0)
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{
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if ($intern = !is_array($data))
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{
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$data = $this->data;
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}
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// do the necessary changes here
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if ($intern)
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{
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$this->data = $data;
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}
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return $data;
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}
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/*!
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@function init
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@abstract initializes data with the content of key
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@param $keys array with keys in form internalName => value
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@result void
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*/
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function init($keys=array())
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{
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$this->data = array();
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$this->db2data();
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$this->data_merge($keys);
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}
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/*!
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@function read
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@abstract reads row matched by key and puts all cols in the data array
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@param $keys array with keys in form internalName => value, may be a scalar value if only one key
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@result data array if row could be retrived else False and data = array()
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*/
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function read($keys)
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{
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$this->init($keys);
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$this->data2db();
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foreach ($this->db_key_cols as $db_col => $col)
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{
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if ($this->data[$col] != '')
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{
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$query .= ($query ? ' AND ':'')."$db_col='".addslashes($this->data[$col])."'";
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}
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}
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if (!$query) // no primary key in keys, lets try the data_cols for a unique key
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{
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foreach($this->db_data_cols as $db_col => $col)
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{
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if ($this->data[$col] != '')
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{
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$query .= ($query ? ' AND ':'')."$db_col='".addslashes($this->data[$col])."'";
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}
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}
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}
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if (!$query) // keys has no cols
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{
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$this->db2data();
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return False;
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}
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$this->db->query($sql = "SELECT * FROM $this->table_name WHERE $query",__LINE__,__FILE__);
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if ($this->debug)
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{
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echo "<p>read(): sql = '$sql': ";
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}
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if (!$this->db->next_record())
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{
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if ($this->autoinc_id)
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{
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unset($this->data[$this->db_key_cols[$this->autoinc_id]]);
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}
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if ($this->debug) echo "nothing found !!!</p>\n";
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$this->db2data();
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return False;
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}
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foreach ($this->db_cols as $db_col => $col)
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{
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$this->data[$col] = $this->db->f($db_col);
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}
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$this->db2data();
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if ($this->debug)
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{
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echo "data =\n"; _debug_array($this->data);
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}
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return $this->data;
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}
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/*!
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@function save
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@abstracts saves the content of data to the db
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@param $keys if given $keys are copied to data before saveing => allows a save as
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@result 0 on success and errno != 0 else
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*/
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function save($keys='')
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{
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$this->data_merge($keys);
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if (!$this->autoinc_id) // no autoincrement id, so we need to find out with read if key already in db
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{
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$data = $this->data;
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$new = !$this->read($data);
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$this->data = $data;
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}
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else
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{
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$new = !$this->data[$this->db_key_cols[$this->autoinc_id]]; // autoincrement idx is 0 => new
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}
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$this->data2db();
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if ($new) // prepare an insert
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{
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foreach($this->db_cols as $db_col => $col)
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{
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if (!$this->autoinc_id || $db_col != $this->autoinc_id) // not write auto-inc-id
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{
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$cols .= ($cols ? ',' : '') . $db_col;
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$vals .= ($vals ? ',' : '') . ($this->data[$col] == '' ?
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$this->empty_on_write : "'".addslashes($this->data[$col])."'");
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}
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}
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$this->db->query($sql = "INSERT INTO $this->table_name ($cols) VALUES ($vals)",__LINE__,__FILE__);
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if ($this->autoinc_id)
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{
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$this->data[$this->db_key_cols[$this->autoinc_id]] = $this->db->get_last_insert_id($this->table_name,$this->autoinc_id);
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}
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}
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else //update existing row, preserv other cols not used here
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{
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foreach($this->db_data_cols as $db_col => $col)
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{
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$vals .= ($vals ? ',':'') . "$db_col=".($this->data[$col] == '' ?
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$this->empty_on_write : "'".addslashes($this->data[$col])."'");
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}
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$keys = '';
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foreach($this->db_key_cols as $db_col => $col)
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{
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$keys .= ($keys ? ',':'') . "$db_col='".addslashes($this->data[$col])."'";
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}
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$this->db->query($sql = "UPDATE $this->table_name SET $vals WHERE $keys",__LINE__,__FILE__);
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}
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if ($this->debug)
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{
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echo "<p>save(): sql = '$sql'</p>\n";
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}
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$this->db2data();
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return $this->db->errno;
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}
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/*!
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@function delete
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@abstract deletes row representing keys in internal data or the supplied $keys if != ''
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@param $keys if not '', array with col => value pairs to characterise the rows to delete
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@result affected rows, should be 1 if ok, 0 if an error
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*/
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function delete($keys='')
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{
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if (!is_array($keys) || !count($keys)) // use internal data
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{
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$data = $this->data;
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$keys = $this->db_key_cols;
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}
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else // data and keys are supplied in $keys
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{
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$data = $keys; $keys = array();
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foreach($this->db_cols as $db_col => $col)
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{
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if (isset($data[$col]))
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{
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$keys[$db_col] = $col;
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}
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}
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}
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$data = $this->data2db($data);
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foreach($keys as $db_col => $col)
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{
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$query .= ($query ? ' AND ' : '') . $db_col . "='" . addslashes($data[$col]) . "'";
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}
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$this->db->query($sql = "DELETE FROM $this->table_name WHERE $query",__LINE__,__FILE__);
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if ($this->debug)
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{
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echo "<p>delete(): sql = '$sql'</p>\n";
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}
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return $this->db->affected_rows();
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}
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/*!
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@function search
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@abstract searches db for rows matching searchcriteria
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@discussion '*' and '?' are replaced with sql-wildcards '%' and '_'
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@param $criteria array of key and data cols
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@param $only_keys True returns only keys, False returns all cols
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@param $order_by fieldnames + {ASC|DESC} separated by colons ','
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@param $wildcard string appended befor and after each criteria
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@param $empty False=empty criteria are ignored in query, True=empty have to be empty in row
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@result array of matching rows (the row is an array of the cols) or False
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*/
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function search($criteria,$only_keys=True,$order_by='',$extra_cols='',$wildcard='',$empty=False)
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{
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$criteria = $this->data2db($criteria);
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foreach($this->db_cols as $db_col => $col)
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{ //echo "testing col='$col', criteria[$col]='".$criteria[$col]."'<br>";
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if (isset($criteria[$col]) && ($empty || $criteria[$col] != ''))
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{
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$query .= ($query ? ' AND ' : ' WHERE ') . $db_col .
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($wildcard || strstr($criteria[$col],'*') || strstr($criteria[$col],'?') ?
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" LIKE '$wildcard".strtr(str_replace('_','\\_',addslashes($criteria[$col])),'*?','%_')."$wildcard'" :
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"='".addslashes($criteria[$col])."'");
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}
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}
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$this->db->query($sql = 'SELECT '.($only_keys ? implode(',',$this->db_key_cols) : '*').
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($extra_cols != '' ? ",$extra_cols" : '')." FROM $this->table_name $query" .
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($order_by != '' ? " ORDER BY $order_by" : ''),__LINE__,__FILE__);
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if ($this->debug)
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{
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echo "<p>search(only_keys=$only_keys,order_by='$order_by',wildcard='$wildcard',empty=$empty)<br>sql = '$sql'</p>\n";
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echo "<br>criteria = "; _debug_array($criteria);
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}
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$arr = array();
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$cols = $only_keys ? $this->db_key_cols : $this->db_cols;
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for ($n = 0; $this->db->next_record(); ++$n)
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{
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$row = array();
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foreach($cols as $db_col => $col)
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{
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$row[$col] = $this->db->f($db_col);
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}
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$arr[] = $this->db2data($row);
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}
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return $n ? $arr : False;
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}
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/*!
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@function not_unique
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@syntax not_unique( $data='' )
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@author ralfbecker
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@abstract Check if values for unique keys are unique
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@param $data data-set to check, defaults to $this->data
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@result 0: all keys are unique, 1: first key not unique, 2: ...
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*/
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function not_unique($data='')
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{
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if (!is_array($data))
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{
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$data = $this->data;
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}
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$n = 1;
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foreach($this->db_uni_cols as $db_col => $col)
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{
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if (list($other) = $this->search(array($db_col => $data[$col])))
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{
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foreach($this->db_key_cols as $db_key_col => $key_col)
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{
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if ($data[$key_col] != $other[$key_col])
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{
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if ($this->debug)
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{
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echo "<p>not_unique in '$col' as for '$key_col': '${data[$key_col]}' != '${other[$key_col]}'</p>\n";
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}
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return $n; // different entry => $n not unique
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}
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}
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}
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++$n;
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}
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return 0;
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}
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};
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