mirror of
https://github.com/Yetangitu/ampache
synced 2025-10-03 09:49:30 +02:00
294 lines
7 KiB
PHP
294 lines
7 KiB
PHP
<?php
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/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
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/**
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*
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* LICENSE: GNU General Public License, version 2 (GPLv2)
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* Copyright 2001 - 2013 Ampache.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License v2
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* as published by the Free Software Foundation.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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class Plugin {
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/* Base Variables */
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public $name;
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/* constructed objects */
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public $_plugin;
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/**
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* Constructor
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* This constructor loads the Plugin config file which defines how to
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* install/uninstall the plugin from Ampache's database
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*/
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public function __construct($name) {
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/* Load the plugin */
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if (!$this->_get_info($name)) {
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return false;
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}
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return true;
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} // Constructor
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/**
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* _get_info
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* This actually loads the config file for the plugin the name of the
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* class contained within the config file must be Plugin[NAME OF FILE]
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*/
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public function _get_info($name) {
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/* Require the file we want */
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require_once Config::get('prefix') . '/modules/plugins/' . $name . '.plugin.php';
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$plugin_name = "Ampache$name";
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$this->_plugin = new $plugin_name();
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if (!$this->is_valid()) {
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return false;
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}
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return true;
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} // _get_info
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/**
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* get_plugins
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* This returns an array of plugin names
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*/
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public static function get_plugins($type='') {
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$results = array();
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// Open up the plugin dir
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$handle = opendir(Config::get('prefix') . '/modules/plugins');
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if (!is_resource($handle)) {
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debug_event('Plugins','Unable to read plugins directory','1');
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}
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// Recurse the directory
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while ($file = readdir($handle)) {
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// Ignore non-plugin files
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if (substr($file,-10,10) != 'plugin.php') { continue; }
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if (is_dir($file)) { continue; }
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$plugin_name = basename($file,'.plugin.php');
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if ($type != '') {
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$plugin = new Plugin($plugin_name);
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if (! Plugin::is_installed($plugin->_plugin->name)) {
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debug_event('Plugins', 'Plugin ' . $plugin->_plugin->name . ' is not installed, skipping', 5);
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continue;
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}
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if (! $plugin->is_valid()) {
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debug_event('Plugins', 'Plugin ' . $plugin_name . ' is not valid, skipping', 5);
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continue;
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}
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if (! method_exists($plugin->_plugin, $type)) {
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debug_event('Plugins', 'Plugin ' . $plugin_name . ' does not support ' . $type . ', skipping', 5);
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continue;
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}
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}
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// It's a plugin record it
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$results[$plugin_name] = $plugin_name;
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} // end while
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// Little stupid but hey
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ksort($results);
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return $results;
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} // get_plugins
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/**
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* is_valid
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* This checks to make sure the plugin has the required functions and
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* settings. Ampache requires public variables name, description, and
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* version (as an int), and methods install, uninstall, and load. We
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* also check that Ampache's database version falls within the min/max
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* version specified by the plugin.
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*/
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function is_valid() {
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/* Check the plugin to make sure it's got the needed vars */
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if (!strlen($this->_plugin->name)) {
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return false;
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}
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if (!strlen($this->_plugin->description)) {
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return false;
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}
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if (!strlen($this->_plugin->version)) {
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return false;
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}
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/* Make sure we've got the required methods */
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if (!method_exists($this->_plugin,'install')) {
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return false;
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}
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if (!method_exists($this->_plugin,'uninstall')) {
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return false;
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}
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if (!method_exists($this->_plugin,'load')) {
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return false;
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}
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/* Make sure it's within the version confines */
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$db_version = $this->get_ampache_db_version();
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if ($db_version < $this->_plugin->min_ampache) {
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return false;
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}
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if ($db_version > $this->_plugin->max_ampache) {
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return false;
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}
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// We've passed all of the tests
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return true;
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} // is_valid
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/**
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* is_installed
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* This checks to see if the specified plugin is currently installed in
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* the database, it doesn't check the files for integrity
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*/
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public static function is_installed($plugin_name) {
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/* All we do is check the version */
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return self::get_plugin_version($plugin_name);
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} // is_installed
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/**
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* install
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* This runs the install function of the plugin and inserts a row into
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* the update_info table to indicate that it's installed.
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*/
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public function install() {
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if ($this->_plugin->install() &&
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$this->set_plugin_version($this->_plugin->version)) {
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return true;
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}
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return false;
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} // install
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/**
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* uninstall
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* This runs the uninstall function of the plugin and removes the row
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* from the update_info table to indicate that it isn't installed.
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*/
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public function uninstall() {
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$this->_plugin->uninstall();
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$this->remove_plugin_version();
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} // uninstall
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/**
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* upgrade
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* This runs the upgrade function of the plugin (if it exists) and
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* updates the database to indicate our new version.
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*/
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public function upgrade() {
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if (method_exists($this->_plugin, 'upgrade')) {
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if($this->_plugin->upgrade()) {
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$this->set_plugin_version($this->_plugin->version);
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}
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}
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} // upgrade
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/**
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* load
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* This calls the plugin's load function
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*/
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public function load() {
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$GLOBALS['user']->set_preferences();
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return $this->_plugin->load();
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}
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/**
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* get_plugin_version
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* This returns the version of the specified plugin
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*/
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public static function get_plugin_version($plugin_name) {
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$name = Dba::escape('Plugin_' . $plugin_name);
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$sql = "SELECT * FROM `update_info` WHERE `key`='$name'";
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$db_results = Dba::read($sql);
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if ($results = Dba::fetch_assoc($db_results)) {
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return $results['value'];
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}
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return false;
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} // get_plugin_version
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/**
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* get_ampache_db_version
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* This function returns the Ampache database version
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*/
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function get_ampache_db_version() {
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$sql = "SELECT * FROM `update_info` WHERE `key`='db_version'";
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$db_results = Dba::read($sql);
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$results = Dba::fetch_assoc($db_results);
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return $results['value'];
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} // get_ampache_db_version
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/**
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* set_plugin_version
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* This sets the plugin version in the update_info table
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*/
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public function set_plugin_version($version) {
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$name = Dba::escape('Plugin_' . $this->_plugin->name);
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$version = Dba::escape($version);
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$sql = "REPLACE INTO `update_info` SET `key`='$name', `value`='$version'";
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$db_results = Dba::read($sql);
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return true;
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} // set_plugin_version
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/**
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* remove_plugin_version
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* This removes the version row from the db done on uninstall
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*/
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public function remove_plugin_version() {
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$name = Dba::escape('Plugin_' . $this->_plugin->name);
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$sql = "DELETE FROM `update_info` WHERE `key`='$name'";
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$db_results = Dba::read($sql);
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return true;
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} // remove_plugin_version
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} //end plugin class
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?>
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