From 76bea966f7f93e719ccbf6e2350f647636d4da2a Mon Sep 17 00:00:00 2001
From: cash <cash.costello@gmail.com>
Date: Sat, 12 Nov 2011 14:28:52 -0500
Subject: added better plugin skeleton and added documentation to some of the
 examples

---
 documentation/examples/events/advanced.php |  7 +++++--
 documentation/examples/events/all.php      | 16 +++++++++++-----
 documentation/examples/events/basic.php    | 14 +++++++++-----
 documentation/examples/events/emit.php     |  7 -------
 documentation/examples/events/trigger.php  | 11 +++++++++++
 5 files changed, 36 insertions(+), 19 deletions(-)
 delete mode 100644 documentation/examples/events/emit.php
 create mode 100644 documentation/examples/events/trigger.php

(limited to 'documentation/examples/events')

diff --git a/documentation/examples/events/advanced.php b/documentation/examples/events/advanced.php
index 22a407579..73edea9da 100644
--- a/documentation/examples/events/advanced.php
+++ b/documentation/examples/events/advanced.php
@@ -1,10 +1,13 @@
 <?php
+/**
+ * This snippets demonstrates how returning false changes the normal operation
+ * of Elgg.
+ */
 
 elgg_register_event_handler('create', 'object', 'example_event_handler');
 
-function example_event_handler($event, $type, $params) {
+function example_event_handler($event, $type, $object) {
 	// Don't allow any non-admin users to create objects
 	// Returning false from this function will halt the creation of the object.
 	return elgg_is_admin_logged_in();
 }
-
diff --git a/documentation/examples/events/all.php b/documentation/examples/events/all.php
index 238178312..0ad02c1d4 100644
--- a/documentation/examples/events/all.php
+++ b/documentation/examples/events/all.php
@@ -1,17 +1,24 @@
 <?php
+/**
+ * If you register an 'all' string for the event name, the handler function will
+ * be called for all events with that name, regardless of event type. The same
+ * can be done for the event type argument. Registering 'all' for both
+ * argyuments results in a handler being called for every event.
+ */
 
 elgg_register_event_handler('all', 'object', 'example_event_handler');
 
 // This function will be called for any event of type 'object'
-function example_event_handler($event, $type, $params) {
+function example_event_handler($event, $type, $object) {
 	// check what sort of object is passed
-	if ($params instanceof ElggObject) {
-		$subtype = $params->getSubtype();
+	if ($object instanceof ElggObject) {
+		$subtype = $object->getSubtype();
 
-		switch($subtype) {
+		switch ($subtype) {
 			case 'blog':
 			case 'thewire':
 			case 'pages':
+				// prevent these object subtypes from being saved or changed
 				return false;
 			default:
 				return true;
@@ -21,4 +28,3 @@ function example_event_handler($event, $type, $params) {
 
 	return true;
 }
-
diff --git a/documentation/examples/events/basic.php b/documentation/examples/events/basic.php
index 91704e60b..ca2762344 100644
--- a/documentation/examples/events/basic.php
+++ b/documentation/examples/events/basic.php
@@ -1,13 +1,17 @@
 <?php
+/**
+ * This snippet demonstrates how to register for an event. It dumps the
+ * parameters that the handler receives to the screen. The third argument
+ * of the handler function is an object that is related to the event. For
+ * the 'init', 'system' eveny, it is null.
+ */
 
 elgg_register_event_handler('init', 'system', 'example_event_handler');
 
-function example_event_handler($event, $type, $params) {
+function example_event_handler($event, $type, $object) {
 	var_dump($event);
-	var_dump($object_type);
-	var_dump($params);
+	var_dump($type);
+	var_dump($object);
 
 	return true;
 }
-
-
diff --git a/documentation/examples/events/emit.php b/documentation/examples/events/emit.php
deleted file mode 100644
index b917c6dc0..000000000
--- a/documentation/examples/events/emit.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-$params = new ElggObject();
-elgg_trigger_event('test', 'example', $params);
-
-// handlers would be registered by saying
-elgg_register_event_handler('test', 'example', 'example_event_handler');
diff --git a/documentation/examples/events/trigger.php b/documentation/examples/events/trigger.php
new file mode 100644
index 000000000..6ce3a76f0
--- /dev/null
+++ b/documentation/examples/events/trigger.php
@@ -0,0 +1,11 @@
+<?php
+/**
+ * These two snippets demonstrates triggering an event and how to register for
+ * that event.
+ */
+
+$object = new ElggObject();
+elgg_trigger_event('test', 'example', $object);
+
+// elsewhere a handler could be registered by saying
+elgg_register_event_handler('test', 'example', 'example_event_handler');
-- 
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