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-rw-r--r--engine/js/lib/events.js65
1 files changed, 65 insertions, 0 deletions
diff --git a/engine/js/lib/events.js b/engine/js/lib/events.js
new file mode 100644
index 000000000..358dd6280
--- /dev/null
+++ b/engine/js/lib/events.js
@@ -0,0 +1,65 @@
+elgg.provide('elgg.config.events');
+elgg.provide('elgg.config.events.all');
+elgg.provide('elgg.config.events.all.all');
+
+elgg.register_event_handler = function(event, type, callback, priority) {
+ elgg.assertTypeOf('string', event);
+ elgg.assertTypeOf('string', event);
+ elgg.assertTypeOf('function', callback);
+
+ if (!event || !type) {
+ return false;
+ }
+
+ elgg.provide('elgg.config.events.' + event + '.' + type);
+
+ var events = elgg.config.events;
+
+ if (!(events[event][type] instanceof elgg.ElggPriorityList)) {
+ events[event][type] = new elgg.ElggPriorityList();
+ }
+
+ return events[event][type].insert(callback, priority);
+};
+
+elgg.trigger_event = function(event, type, object) {
+ elgg.assertTypeOf('string', event);
+ elgg.assertTypeOf('string', event);
+
+ elgg.provide('elgg.config.events.' + event + '.' + type);
+ elgg.provide('elgg.config.events.all.' + type);
+ elgg.provide('elgg.config.events.' + event + '.all');
+ elgg.provide('elgg.config.events.all.all');
+
+ var events = elgg.config.events;
+
+ var callEventHandler = function(handler) {
+ return handler(event, type, object) !== false;
+ };
+
+ if (events[event][type] instanceof elgg.ElggPriorityList) {
+ if (!events[event][type].every(callEventHandler)) {
+ return false;
+ }
+ }
+
+ if (events['all'][type] instanceof elgg.ElggPriorityList) {
+ if (!events['all'][type].every(callEventHandler)) {
+ return false;
+ }
+ }
+
+ if (events[event]['all'] instanceof elgg.ElggPriorityList) {
+ if (!events[event]['all'].every(callEventHandler)) {
+ return false;
+ }
+ }
+
+ if (events['all']['all'] instanceof elgg.ElggPriorityList) {
+ if (!events['all']['all'].every(callEventHandler)) {
+ return false;
+ }
+ }
+
+ return true;
+}; \ No newline at end of file