Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file include/plugin.php
*
* @brief Some functions to handle addons and themes.
*/
/**
* @brief uninstalls an addon.
*
* @param string $plugin name of the addon
* @return boolean
*/
if (! function_exists('uninstall_plugin')){
function uninstall_plugin($plugin){
logger("Addons: uninstalling " . $plugin);
q("DELETE FROM `addon` WHERE `name` = '%s' ",
dbesc($plugin)
);
@include_once('addon/' . $plugin . '/' . $plugin . '.php');
if(function_exists($plugin . '_uninstall')) {
$func = $plugin . '_uninstall';
$func();
}
}}
/**
* @brief installs an addon.
*
* @param string $plugin name of the addon
* @return bool
*/
if (! function_exists('install_plugin')){
function install_plugin($plugin) {
// silently fail if plugin was removed
if(! file_exists('addon/' . $plugin . '/' . $plugin . '.php'))
return false;
logger("Addons: installing " . $plugin);
$t = @filemtime('addon/' . $plugin . '/' . $plugin . '.php');
@include_once('addon/' . $plugin . '/' . $plugin . '.php');
if(function_exists($plugin . '_install')) {
$func = $plugin . '_install';
$func();
$plugin_admin = (function_exists($plugin."_plugin_admin")?1:0);
$r = q("INSERT INTO `addon` (`name`, `installed`, `timestamp`, `plugin_admin`) VALUES ( '%s', 1, %d , %d ) ",
dbesc($plugin),
intval($t),
$plugin_admin
);
// we can add the following with the previous SQL
// once most site tables have been updated.
// This way the system won't fall over dead during the update.
if(file_exists('addon/' . $plugin . '/.hidden')) {
q("UPDATE `addon` SET `hidden` = 1 WHERE `name` = '%s'",
dbesc($plugin)
);
}
return true;
}
else {
logger("Addons: FAILED installing " . $plugin);
return false;
}
}}
// reload all updated plugins
if(! function_exists('reload_plugins')) {
function reload_plugins() {
$plugins = get_config('system','addon');
if(strlen($plugins)) {
$r = q("SELECT * FROM `addon` WHERE `installed` = 1");
if (dbm::is_result($r))
$installed = $r;
else
$installed = array();
$parr = explode(',',$plugins);
if(count($parr)) {
foreach($parr as $pl) {
$pl = trim($pl);
$fname = 'addon/' . $pl . '/' . $pl . '.php';
if(file_exists($fname)) {
$t = @filemtime($fname);
foreach($installed as $i) {
if(($i['name'] == $pl) && ($i['timestamp'] != $t)) {
logger('Reloading plugin: ' . $i['name']);
@include_once($fname);
if(function_exists($pl . '_uninstall')) {
$func = $pl . '_uninstall';
$func();
}
if(function_exists($pl . '_install')) {
$func = $pl . '_install';
$func();
}
q("UPDATE `addon` SET `timestamp` = %d WHERE `id` = %d",
intval($t),
intval($i['id'])
);
}
}
}
}
}
}
}}
/**
* @brief check if addon is enabled
*
* @param string $plugin
* @return boolean
*/
function plugin_enabled($plugin) {
$r = q("SELECT * FROM `addon` WHERE `installed` = 1 AND `name` = '%s'", $plugin);
return ((dbm::is_result($r)) && (count($r) > 0));
}
/**
* @brief registers a hook.
*
* @param string $hook the name of the hook
* @param string $file the name of the file that hooks into
* @param string $function the name of the function that the hook will call
* @param int $priority A priority (defaults to 0)
* @return mixed|bool
*/
if(! function_exists('register_hook')) {
function register_hook($hook,$file,$function,$priority=0) {
$r = q("SELECT * FROM `hook` WHERE `hook` = '%s' AND `file` = '%s' AND `function` = '%s' LIMIT 1",
dbesc($hook),
dbesc($file),
dbesc($function)
);
if (dbm::is_result($r))
return true;
$r = q("INSERT INTO `hook` (`hook`, `file`, `function`, `priority`) VALUES ( '%s', '%s', '%s', '%s' ) ",
dbesc($hook),
dbesc($file),
dbesc($function),
dbesc($priority)
);
return $r;
}}
/**
* @brief unregisters a hook.
*
* @param string $hook the name of the hook
* @param string $file the name of the file that hooks into
* @param string $function the name of the function that the hook called
* @return array
*/
if(! function_exists('unregister_hook')) {
function unregister_hook($hook,$file,$function) {
$r = q("DELETE FROM `hook` WHERE `hook` = '%s' AND `file` = '%s' AND `function` = '%s'",
dbesc($hook),
dbesc($file),
dbesc($function)
);
return $r;
}}
if(! function_exists('load_hooks')) {
function load_hooks() {
$a = get_app();
$a->hooks = array();
$r = q("SELECT * FROM `hook` WHERE 1 ORDER BY `priority` DESC, `file`");
if (dbm::is_result($r)) {
foreach ($r as $rr) {
if(! array_key_exists($rr['hook'],$a->hooks))
$a->hooks[$rr['hook']] = array();
$a->hooks[$rr['hook']][] = array($rr['file'],$rr['function']);
}
}
}}
/**
* @brief Calls a hook.
*
* Use this function when you want to be able to allow a hook to manipulate
* the provided data.
*
* @param string $name of the hook to call
* @param string|array &$data to transmit to the callback handler
*/
function call_hooks($name, &$data = null) {
$stamp1 = microtime(true);
$a = get_app();
if (is_array($a->hooks) && array_key_exists($name, $a->hooks))
foreach ($a->hooks[$name] as $hook)
call_single_hook($a, $name, $hook, $data);
}
/**
* @brief Calls a single hook.
*
* @param string $name of the hook to call
* @param array $hook Hook data
* @param string|array &$data to transmit to the callback handler
*/
function call_single_hook($a, $name, $hook, &$data = null) {
// Don't run a theme's hook if the user isn't using the theme
if (strpos($hook[0], 'view/theme/') !== false && strpos($hook[0], 'view/theme/'.current_theme()) === false)
return;
@include_once($hook[0]);
if (function_exists($hook[1])) {
$func = $hook[1];
$func($a, $data);
} else {
// remove orphan hooks
q("DELETE FROM `hook` WHERE `hook` = '%s' AND `file` = '%s' AND `function` = '%s'",
dbesc($name),
dbesc($hook[0]),
dbesc($hook[1])
);
}
}
//check if an app_menu hook exist for plugin $name.
//Return true if the plugin is an app
if(! function_exists('plugin_is_app')) {
function plugin_is_app($name) {
$a = get_app();
if(is_array($a->hooks) && (array_key_exists('app_menu',$a->hooks))) {
foreach($a->hooks['app_menu'] as $hook) {
if($hook[0] == 'addon/'.$name.'/'.$name.'.php')
return true;
}
}
return false;
}}
/**
* @brief Parse plugin comment in search of plugin infos.
*
* like
* \code
*...* Name: Plugin
* * Description: A plugin which plugs in
* . * Version: 1.2.3
* * Author: John <profile url>
* * Author: Jane <email>
* *
* *\endcode
* @param string $plugin the name of the plugin
* @return array with the plugin information
*/
if (! function_exists('get_plugin_info')){
function get_plugin_info($plugin){
$a = get_app();
$info=Array(
'name' => $plugin,
'description' => "",
'author' => array(),
'version' => "",
'status' => ""
);
if (!is_file("addon/$plugin/$plugin.php")) return $info;
$stamp1 = microtime(true);
$f = file_get_contents("addon/$plugin/$plugin.php");
$a->save_timestamp($stamp1, "file");
$r = preg_match("|/\*.*\*/|msU", $f, $m);
if ($r){
$ll = explode("\n", $m[0]);
foreach( $ll as $l ) {
$l = trim($l,"\t\n\r */");
if ($l!=""){
list($k,$v) = array_map("trim", explode(":",$l,2));
$k= strtolower($k);
if ($k=="author"){
$r=preg_match("|([^<]+)<([^>]+)>|", $v, $m);
if ($r) {
$info['author'][] = array('name'=>$m[1], 'link'=>$m[2]);
} else {
$info['author'][] = array('name'=>$v);
}
} else {
if (array_key_exists($k,$info)){
$info[$k]=$v;
}
}
}
}
}
return $info;
}}
/**
* @brief Parse theme comment in search of theme infos.
*
* like
* \code
* ..* Name: My Theme
* * Description: My Cool Theme
* . * Version: 1.2.3
* * Author: John <profile url>
* * Maintainer: Jane <profile url>
* *
* \endcode
* @param string $theme the name of the theme
* @return array
*/
if (! function_exists('get_theme_info')){
function get_theme_info($theme){
$info=Array(
'name' => $theme,
'description' => "",
'author' => array(),
'maintainer' => array(),
'version' => "",
'credits' => "",
'experimental' => false,
'unsupported' => false
);
if(file_exists("view/theme/$theme/experimental"))
$info['experimental'] = true;
if(file_exists("view/theme/$theme/unsupported"))
$info['unsupported'] = true;
if (!is_file("view/theme/$theme/theme.php")) return $info;
$a = get_app();
$stamp1 = microtime(true);
$f = file_get_contents("view/theme/$theme/theme.php");
$a->save_timestamp($stamp1, "file");
$r = preg_match("|/\*.*\*/|msU", $f, $m);
if ($r){
$ll = explode("\n", $m[0]);
foreach( $ll as $l ) {
$l = trim($l,"\t\n\r */");
if ($l!=""){
list($k,$v) = array_map("trim", explode(":",$l,2));
$k= strtolower($k);
if ($k=="author"){
$r=preg_match("|([^<]+)<([^>]+)>|", $v, $m);
if ($r) {
$info['author'][] = array('name'=>$m[1], 'link'=>$m[2]);
} else {
$info['author'][] = array('name'=>$v);
}
}
elseif ($k=="maintainer"){
$r=preg_match("|([^<]+)<([^>]+)>|", $v, $m);
if ($r) {
$info['maintainer'][] = array('name'=>$m[1], 'link'=>$m[2]);
} else {
$info['maintainer'][] = array('name'=>$v);
}
} else {
if (array_key_exists($k,$info)){
$info[$k]=$v;
}
}
}
}
}
return $info;
}}
/**
* @brief Returns the theme's screenshot.
*
* The screenshot is expected as view/theme/$theme/screenshot.[png|jpg].
*
* @param sring $theme The name of the theme
* @return string
*/
function get_theme_screenshot($theme) {
$exts = array('.png','.jpg');
foreach($exts as $ext) {
if (file_exists('view/theme/' . $theme . '/screenshot' . $ext)) {
return(App::get_baseurl() . '/view/theme/' . $theme . '/screenshot' . $ext);
}
}
return(App::get_baseurl() . '/images/blank.png');
}
// install and uninstall theme
if (! function_exists('uninstall_theme')){
function uninstall_theme($theme){
logger("Addons: uninstalling theme " . $theme);
include_once("view/theme/$theme/theme.php");
if (function_exists("{$theme}_uninstall")) {
$func = "{$theme}_uninstall";
$func();
}
}}
if (! function_exists('install_theme')){
function install_theme($theme) {
// silently fail if theme was removed
if (! file_exists("view/theme/$theme/theme.php")) {
return false;
}
logger("Addons: installing theme $theme");
include_once("view/theme/$theme/theme.php");
if (function_exists("{$theme}_install")) {
$func = "{$theme}_install";
$func();
return true;
} else {
logger("Addons: FAILED installing theme $theme");
return false;
}
}}
// check service_class restrictions. If there are no service_classes defined, everything is allowed.
// if $usage is supplied, we check against a maximum count and return true if the current usage is
// less than the subscriber plan allows. Otherwise we return boolean true or false if the property
// is allowed (or not) in this subscriber plan. An unset property for this service plan means
// the property is allowed, so it is only necessary to provide negative properties for each plan,
// or what the subscriber is not allowed to do.
function service_class_allows($uid,$property,$usage = false) {
if ($uid == local_user()) {
$service_class = $a->user['service_class'];
} else {
$r = q("SELECT `service_class` FROM `user` WHERE `uid` = %d LIMIT 1",
intval($uid)
);
if (dbm::is_result($r)) {
$service_class = $r[0]['service_class'];
}
}
if (! x($service_class)) {
// everything is allowed
return true;
}
$arr = get_config('service_class',$service_class);
if (! is_array($arr) || (! count($arr))) {
return true;
}
if ($usage === false) {
return ((x($arr[$property])) ? (bool) $arr['property'] : true);
} else {
if (! array_key_exists($property,$arr)) {
return true;
}
return (((intval($usage)) < intval($arr[$property])) ? true : false);
}
}
function service_class_fetch($uid,$property) {
if ($uid == local_user()) {
$service_class = $a->user['service_class'];
} else {
$r = q("SELECT `service_class` FROM `user` WHERE `uid` = %d LIMIT 1",
intval($uid)
);
if (dbm::is_result($r)) {
$service_class = $r[0]['service_class'];
}
}
if(! x($service_class))
return false; // everything is allowed
$arr = get_config('service_class',$service_class);
if(! is_array($arr) || (! count($arr)))
return false;
return((array_key_exists($property,$arr)) ? $arr[$property] : false);
}
function upgrade_link($bbcode = false) {
$l = get_config('service_class','upgrade_link');
if(! $l)
return '';
if($bbcode)
$t = sprintf('[url=%s]' . t('Click here to upgrade.') . '[/url]', $l);
else
$t = sprintf('<a href="%s">' . t('Click here to upgrade.') . '</div>', $l);
return $t;
}
function upgrade_message($bbcode = false) {
$x = upgrade_link($bbcode);
return t('This action exceeds the limits set by your subscription plan.') . (($x) ? ' ' . $x : '') ;
}
function upgrade_bool_message($bbcode = false) {
$x = upgrade_link($bbcode);
return t('This action is not available under your subscription plan.') . (($x) ? ' ' . $x : '') ;
}
/**
* @brief Get the full path to relevant theme files by filename
*
* This function search in the theme directory (and if not present in global theme directory)
* if there is a directory with the file extension and for a file with the given
* filename.
*
* @param string $file Filename
* @param string $root Full root path
* @return string Path to the file or empty string if the file isn't found
*/
function theme_include($file, $root = '') {
// Make sure $root ends with a slash / if it's not blank
if($root !== '' && $root[strlen($root)-1] !== '/')
$root = $root . '/';
$theme_info = $a->theme_info;
if(is_array($theme_info) AND array_key_exists('extends',$theme_info))
$parent = $theme_info['extends'];
else
$parent = 'NOPATH';
$theme = current_theme();
$thname = $theme;
$ext = substr($file,strrpos($file,'.')+1);
$paths = array(
"{$root}view/theme/$thname/$ext/$file",
"{$root}view/theme/$parent/$ext/$file",
"{$root}view/$ext/$file",
);
foreach($paths as $p) {
// strpos() is faster than strstr when checking if one string is in another (http://php.net/manual/en/function.strstr.php)
if(strpos($p,'NOPATH') !== false)
continue;
if(file_exists($p))
return $p;
}
return '';
}