296 lines
9.4 KiB
PHP
296 lines
9.4 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009, StatusNet, Inc.
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*
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* This program 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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* 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 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
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global $config, $_server, $_path;
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/**
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* Global configuration setup and management.
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*/
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class StatusNet
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{
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protected static $have_config;
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/**
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* Configure and instantiate a plugin into the current configuration.
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* Class definitions will be loaded from standard paths if necessary.
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* Note that initialization events won't be fired until later.
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*
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* @param string $name class name & plugin file/subdir name
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* @param array $attrs key/value pairs of public attributes to set on plugin instance
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*
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* @throws ServerException if plugin can't be found
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*/
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public static function addPlugin($name, $attrs = null)
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{
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$name = ucfirst($name);
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$pluginclass = "{$name}Plugin";
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if (!class_exists($pluginclass)) {
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$files = array("local/plugins/{$pluginclass}.php",
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"local/plugins/{$name}/{$pluginclass}.php",
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"local/{$pluginclass}.php",
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"local/{$name}/{$pluginclass}.php",
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"plugins/{$pluginclass}.php",
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"plugins/{$name}/{$pluginclass}.php");
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foreach ($files as $file) {
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$fullpath = INSTALLDIR.'/'.$file;
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if (@file_exists($fullpath)) {
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include_once($fullpath);
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break;
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}
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}
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if (!class_exists($pluginclass)) {
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throw new ServerException(500, "Plugin $name not found.");
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}
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}
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$inst = new $pluginclass();
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if (!empty($attrs)) {
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foreach ($attrs as $aname => $avalue) {
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$inst->$aname = $avalue;
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}
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}
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return true;
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}
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/**
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* Initialize, or re-initialize, StatusNet global configuration
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* and plugins.
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*
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* If switching site configurations during script execution, be
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* careful when working with leftover objects -- global settings
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* affect many things and they may not behave as you expected.
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*
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* @param $server optional web server hostname for picking config
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* @param $path optional URL path for picking config
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* @param $conffile optional configuration file path
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*
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* @throws NoConfigException if config file can't be found
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*/
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public static function init($server=null, $path=null, $conffile=null)
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{
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StatusNet::initDefaults($server, $path);
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StatusNet::loadConfigFile($conffile);
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// Load settings from database; note we need autoload for this
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Config::loadSettings();
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self::initPlugins();
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}
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/**
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* Fire initialization events for all instantiated plugins.
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*/
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protected static function initPlugins()
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{
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// Load default plugins
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foreach (common_config('plugins', 'default') as $name => $params) {
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if (is_null($params)) {
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addPlugin($name);
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} else if (is_array($params)) {
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if (count($params) == 0) {
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addPlugin($name);
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} else {
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$keys = array_keys($params);
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if (is_string($keys[0])) {
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addPlugin($name, $params);
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} else {
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foreach ($params as $paramset) {
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addPlugin($name, $paramset);
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}
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}
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}
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}
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}
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// XXX: if plugins should check the schema at runtime, do that here.
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if (common_config('db', 'schemacheck') == 'runtime') {
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Event::handle('CheckSchema');
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}
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// Give plugins a chance to initialize in a fully-prepared environment
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Event::handle('InitializePlugin');
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}
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/**
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* Quick-check if configuration has been established.
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* Useful for functions which may get used partway through
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* initialization to back off from fancier things.
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*
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* @return bool
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*/
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public function haveConfig()
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{
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return self::$have_config;
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}
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/**
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* Build default configuration array
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* @return array
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*/
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protected static function defaultConfig()
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{
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global $_server, $_path;
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require(INSTALLDIR.'/lib/default.php');
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return $default;
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}
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/**
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* Establish default configuration based on given or default server and path
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* Sets global $_server, $_path, and $config
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*/
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protected static function initDefaults($server, $path)
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{
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global $_server, $_path, $config;
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Event::clearHandlers();
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// try to figure out where we are. $server and $path
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// can be set by including module, else we guess based
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// on HTTP info.
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if (isset($server)) {
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$_server = $server;
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} else {
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$_server = array_key_exists('SERVER_NAME', $_SERVER) ?
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strtolower($_SERVER['SERVER_NAME']) :
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null;
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}
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if (isset($path)) {
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$_path = $path;
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} else {
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$_path = (array_key_exists('SERVER_NAME', $_SERVER) && array_key_exists('SCRIPT_NAME', $_SERVER)) ?
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self::_sn_to_path($_SERVER['SCRIPT_NAME']) :
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null;
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}
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// Set config values initially to default values
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$default = self::defaultConfig();
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$config = $default;
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// default configuration, overwritten in config.php
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// Keep DB_DataObject's db config synced to ours...
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$config['db'] = &PEAR::getStaticProperty('DB_DataObject','options');
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$config['db'] = $default['db'];
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// Backward compatibility
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$config['site']['design'] =& $config['design'];
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if (function_exists('date_default_timezone_set')) {
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/* Work internally in UTC */
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date_default_timezone_set('UTC');
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}
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}
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protected function _sn_to_path($sn)
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{
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$past_root = substr($sn, 1);
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$last_slash = strrpos($past_root, '/');
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if ($last_slash > 0) {
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$p = substr($past_root, 0, $last_slash);
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} else {
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$p = '';
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}
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return $p;
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}
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/**
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* Load the default or specified configuration file.
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* Modifies global $config and may establish plugins.
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*
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* @throws NoConfigException
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*/
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protected function loadConfigFile($conffile=null)
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{
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global $_server, $_path, $config;
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// From most general to most specific:
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// server-wide, then vhost-wide, then for a path,
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// finally for a dir (usually only need one of the last two).
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if (isset($conffile)) {
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$config_files = array($conffile);
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} else {
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$config_files = array('/etc/statusnet/statusnet.php',
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'/etc/statusnet/laconica.php',
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'/etc/laconica/laconica.php',
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'/etc/statusnet/'.$_server.'.php',
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'/etc/laconica/'.$_server.'.php');
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if (strlen($_path) > 0) {
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$config_files[] = '/etc/statusnet/'.$_server.'_'.$_path.'.php';
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$config_files[] = '/etc/laconica/'.$_server.'_'.$_path.'.php';
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}
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$config_files[] = INSTALLDIR.'/config.php';
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}
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self::$have_config = false;
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foreach ($config_files as $_config_file) {
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if (@file_exists($_config_file)) {
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include($_config_file);
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self::$have_config = true;
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}
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}
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if (!self::$have_config) {
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throw new NoConfigException("No configuration file found.",
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$config_files);
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}
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// Fixup for statusnet.ini
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$_db_name = substr($config['db']['database'], strrpos($config['db']['database'], '/') + 1);
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if ($_db_name != 'statusnet' && !array_key_exists('ini_'.$_db_name, $config['db'])) {
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$config['db']['ini_'.$_db_name] = INSTALLDIR.'/classes/statusnet.ini';
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}
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// Backwards compatibility
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if (array_key_exists('memcached', $config)) {
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if ($config['memcached']['enabled']) {
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addPlugin('Memcache', array('servers' => $config['memcached']['server']));
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}
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if (!empty($config['memcached']['base'])) {
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$config['cache']['base'] = $config['memcached']['base'];
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}
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}
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}
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}
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class NoConfigException extends Exception
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{
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public $config_files;
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function __construct($msg, $config_files) {
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parent::__construct($msg);
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$this->config_files = $config_files;
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}
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}
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