135 lines
3.5 KiB
PHP
135 lines
3.5 KiB
PHP
<?php
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Event API *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/** @private */
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global $_shm_event_listeners;
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$_shm_event_listeners = array();
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function _load_event_listeners() {
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global $_shm_event_listeners, $_shm_ctx;
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$_shm_ctx->log_start("Loading extensions");
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$cache_path = data_path("cache/shm_event_listeners.php");
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if(COMPILE_ELS && file_exists($cache_path)) {
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require_once($cache_path);
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}
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else {
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_set_event_listeners();
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if(COMPILE_ELS) {
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_dump_event_listeners($_shm_event_listeners, $cache_path);
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}
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}
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$_shm_ctx->log_endok();
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}
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function _set_event_listeners() {
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global $_shm_event_listeners;
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$_shm_event_listeners = array();
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foreach(get_declared_classes() as $class) {
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$rclass = new ReflectionClass($class);
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if($rclass->isAbstract()) {
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// don't do anything
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}
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elseif(is_subclass_of($class, "Extension")) {
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/** @var Extension $extension */
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$extension = new $class();
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// skip extensions which don't support our current database
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if(!$extension->is_live()) continue;
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foreach(get_class_methods($extension) as $method) {
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if(substr($method, 0, 2) == "on") {
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$event = substr($method, 2) . "Event";
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$pos = $extension->get_priority() * 100;
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while(isset($_shm_event_listeners[$event][$pos])) {
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$pos += 1;
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}
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$_shm_event_listeners[$event][$pos] = $extension;
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}
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}
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}
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}
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}
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/**
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* @param array $event_listeners
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* @param string $path
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*/
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function _dump_event_listeners($event_listeners, $path) {
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$p = "<"."?php\n";
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foreach(get_declared_classes() as $class) {
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$rclass = new ReflectionClass($class);
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if($rclass->isAbstract()) {}
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elseif(is_subclass_of($class, "Extension")) {
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$p .= "\$$class = new $class(); ";
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}
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}
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$p .= "\$_shm_event_listeners = array(\n";
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foreach($event_listeners as $event => $listeners) {
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$p .= "\t'$event' => array(\n";
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foreach($listeners as $id => $listener) {
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$p .= "\t\t$id => \$".get_class($listener).",\n";
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}
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$p .= "\t),\n";
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}
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$p .= ");\n";
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$p .= "?".">";
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file_put_contents($path, $p);
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}
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/**
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* @param string $ext_name Main class name (eg ImageIO as opposed to ImageIOTheme or ImageIOTest)
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* @return bool
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*/
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function ext_is_live(string $ext_name): bool {
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if (class_exists($ext_name)) {
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/** @var Extension $ext */
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$ext = new $ext_name();
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return $ext->is_live();
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}
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return false;
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}
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/** @private */
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global $_shm_event_count;
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$_shm_event_count = 0;
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/**
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* Send an event to all registered Extensions.
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*
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* @param Event $event
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*/
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function send_event(Event $event) {
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global $_shm_event_listeners, $_shm_event_count, $_shm_ctx;
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if(!isset($_shm_event_listeners[get_class($event)])) return;
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$method_name = "on".str_replace("Event", "", get_class($event));
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// send_event() is performance sensitive, and with the number
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// of times context gets called the time starts to add up
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$ctx_enabled = constant('CONTEXT');
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if($ctx_enabled) $_shm_ctx->log_start(get_class($event));
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// SHIT: http://bugs.php.net/bug.php?id=35106
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$my_event_listeners = $_shm_event_listeners[get_class($event)];
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ksort($my_event_listeners);
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foreach($my_event_listeners as $listener) {
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if($ctx_enabled) $_shm_ctx->log_start(get_class($listener));
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if(method_exists($listener, $method_name)) {
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$listener->$method_name($event);
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}
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if($ctx_enabled) $_shm_ctx->log_endok();
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}
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$_shm_event_count++;
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if($ctx_enabled) $_shm_ctx->log_endok();
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}
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