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<?php
/*
Copyright (c) 2001 - 2006 Ampache.org
All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*!
@header View Object of crappyness
View object that is thrown into their session
*/
class View {
//Basic Componets
var $base_sql;
var $offset;
var $offset_limit;
var $sort_order; //asc or desc
var $sort_type;
var $action;
var $total_items;
//generate a new view
function View($base_sql=0,$script=0,$sort_type=0,$total_items=0,$offset_limit=0) {
global $conf;
// If we don't have a base sql, stop here
if (!is_string($base_sql)) {
return true;
}
//Convert all 's into "s
$base_sql = str_replace("'",'"',$base_sql);
$this->base_sql = $base_sql;
if ($offset_limit) { $this->offset_limit = $offset_limit; }
else { $this->offset_limit = $_SESSION['offset_limit']; }
if ($this->offset_limit < '1') { $this->offset_limit = '50'; }
$this->script = $script;
$this->sort_type = $sort_type;
$this->sort_order = "ASC";
$this->offset = 0;
$this->total_items = $total_items;
// Set the session
$_SESSION['view_offset_limit'] = $this->offset_limit;
$_SESSION['view_sort_type'] = $this->sort_type;
$_SESSION['view_offset'] = $this->offset;
$_SESSION['view_base_sql'] = $this->base_sql;
$_SESSION['view_sort_order'] = $this->sort_order;
$_SESSION['view_script'] = $this->script;
$_SESSION['view_total_items'] = $this->total_items;
$this->sql = $this->generate_sql();
} //constructor
//takes all the parts and makes a full blown sql statement
function generate_sql() {
global $conf;
$sql = $this->base_sql . " ORDER BY " . $this->sort_type ." ". $this->sort_order ." LIMIT " . $this->offset . "," . $this->offset_limit;
return $sql;
} //generate_sql
//change the sort order from asc to desc or vise versa
function change_sort($new_sort=0) {
global $conf;
if ($new_sort) {
$this->sort_order = $new_sort;
}
elseif ($this->sort_order == "DESC") {
$this->sort_order = "ASC";
}
else {
$this->sort_order = "DESC";
}
$_SESSION['view_sort_order'] = $this->sort_order;
$this->sql = $this->generate_sql();
return;
} //change_sort
//change the base sql
function change_sql($base_sql) {
global $conf;
//Convert all 's into "s
$base_sql = str_replace("'",'"',$base_sql);
$this->base_sql = $base_sql;
$_SESSION['view_base_sql'] = $this->base_sql;
$this->sql = $this->generate_sql();
} //change_sql
//change offset
function change_offset($offset=0) {
global $conf;
if (isset($offset)) {
$this->offset = $offset;
}
else {
$this->offset = $this->offset + $this->offset_limit;
}
$_SESSION['view_offset'] = $this->offset;
$this->sql = $this->generate_sql();
} //change_offset
//change sort_type
function change_sort_type($sort_type) {
$this->sort_type = $sort_type;
$_SESSION['view_sort_type'] = $this->sort_type;
$this->sql = $this->generate_sql();
} //change_sort_type
/*!
@function change_offset_limit
@discussion changes the offset limit, sets the session
var and generates the sql statement
*/
function change_offset_limit($offset_limit) {
$this->offset_limit = $offset_limit;
$_SESSION['view_offset_limit'] = $this->offset_limit;
$this->sql = $this->generate_sql();
} // change_offset_limit
/*!
@function initialize
@discussion initializes the view object, checks $_REQUEST
for changes to the view object
*/
function initialize($sql='') {
/* From time to time we need to change the SQL statement while
* maintaining the paging
*/
if ($sql) {
$this->change_sql($sql);
}
if ($_REQUEST['sort_type']) {
$this->change_sort_type($_REQUEST['sort_type']);
}
if (isset($_REQUEST['offset'])) {
$this->change_offset($_REQUEST['offset']);
}
if ($_REQUEST['base_sql']) {
$this->change_sql($_REQUEST['base_sql']);
}
if (isset($_REQUEST['sort_order'])) {
$this->change_sort($_REQUEST['sort_order']);
}
if ($_REQUEST['offset_limit']) {
$this->change_offset_limit($_REQUEST['offset_limit']);
}
} // initialize
/*!
@function import_session_view
@discussion this imports the view from the session for use..
this keeps us from having to globalize anything
wohoo!
*/
function import_session_view() {
$this->sort_type = $_SESSION['view_sort_type'];
$this->offset = $_SESSION['view_offset'];
$this->base_sql = $_SESSION['view_base_sql'];
$this->sort_order = $_SESSION['view_sort_order'];
$this->script = $_SESSION['view_script'];
$this->total_items = $_SESSION['view_total_items'];
if ($_SESSION['view_offset_limit']) {
$this->offset_limit = $_SESSION['view_offset_limit'];
}
else {
$this->offset_limit = $_SESSION['offset_limit'];
}
$this->sql = $this->generate_sql();
} // import_session_view
} //end class
?>
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