Refs #3115. Migrated twitterservice to twitter_api. Added upgrade to migrate plugin and user settings.

git-svn-id: http://code.elgg.org/elgg/trunk@8699 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 164 insertions, 0 deletions

diff --git a/mod/twitter_api/start.php b/mod/twitter_api/start.php
new file mode 100644
index 000000000..8a49db719
--- /dev/null
+++ b/mod/twitter_api/start.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ * Elgg Twitter Service
+ * This service plugin allows users to authenticate their Elgg account with Twitter.
+ *
+ * @package TwitterAPI
+ */
+
+elgg_register_event_handler('init', 'system', 'twitter_api_init');
+
+function twitter_api_init() {
+
+	// require libraries
+	$base = elgg_get_plugins_path() . 'twitter_api';
+	elgg_register_library('twitter_oauth', "$base/vendors/twitteroauth/twitterOAuth.php");
+	elgg_register_library('twitter_api', "$base/lib/twitter_api.php");
+
+	elgg_load_library('twitter_api');
+
+	// extend site views
+	elgg_extend_view('metatags', 'twitter_api/metatags');
+	elgg_extend_view('css', 'twitter_api/css');
+
+	// sign on with twitter
+	if (twitter_api_allow_sign_on_with_twitter()) {
+		elgg_extend_view('login/extend', 'twitter_api/login');
+	}
+
+	// register page handler
+	elgg_register_page_handler('twitter_api', 'twitter_api_pagehandler');
+	// backward compatibility
+	elgg_register_page_handler('twitterservice', 'twitter_api_pagehandler_deprecated');
+
+	// register Walled Garden public pages
+	elgg_register_plugin_hook_handler('public_pages', 'walled_garden', 'twitter_api_public_pages');
+
+	// allow plugin authors to hook into this service
+	elgg_register_plugin_hook_handler('tweet', 'twitter_service', 'twitter_api_tweet');
+}
+
+/**
+ * Handles old pg/twitterservice/ handler
+ *
+ * @param array$page
+ */
+function twitter_api_pagehandler_deprecated($page) {
+	$url = elgg_get_site_url() . 'pg/twitter_api/authorize';
+	$msg = elgg_echo('twitter_api:deprecated_callback_url', array($url));
+	register_error($msg);
+
+	return twitter_api_pagehandler($page);
+}
+
+
+/**
+ * Serves pages for twitter.
+ *
+ * @param array$page
+ */
+function twitter_api_pagehandler($page) {
+	if (!isset($page[0])) {
+		forward();
+	}
+
+	switch ($page[0]) {
+		case 'authorize':
+			twitter_api_authorize();
+			break;
+		case 'revoke':
+			twitter_api_revoke();
+			break;
+		case 'forward':
+			twitter_api_forward();
+			break;
+		case 'login':
+			twitter_api_login();
+			break;
+		default:
+			forward();
+			break;
+	}
+}
+
+/**
+ * Push a tweet to twitter.
+ *
+ * @param unknown_type $hook
+ * @param unknown_type $entity_type
+ * @param unknown_type $returnvalue
+ * @param unknown_type $params
+ */
+function twitter_api_tweet($hook, $entity_type, $returnvalue, $params) {
+	static $plugins;
+	if (!$plugins) {
+		$plugins = elgg_trigger_plugin_hook('plugin_list', 'twitter_service', NULL, array());
+	}
+
+	// ensure valid plugin
+	if (!in_array($params['plugin'], $plugins)) {
+		return NULL;
+	}
+
+	// check admin settings
+	$consumer_key = elgg_get_plugin_setting('consumer_key', 'twitter_api');
+	$consumer_secret = elgg_get_plugin_setting('consumer_secret', 'twitter_api');
+	if (!($consumer_key && $consumer_secret)) {
+		return NULL;
+	}
+
+	// check user settings
+	$user_id = elgg_get_logged_in_user_guid();
+	$access_key = elgg_get_plugin_user_setting('access_key', $user_id, 'twitter_api');
+	$access_secret = elgg_get_plugin_user_setting('access_secret', $user_id, 'twitter_api');
+	if (!($access_key && $access_secret)) {
+		return NULL;
+	}
+
+	// send tweet
+	$api = new TwitterOAuth($consumer_key, $consumer_secret, $access_key, $access_secret);
+	$response = $api->post('statuses/update', array('status' => $params['message']));
+
+	return TRUE;
+}
+
+/**
+ * Return tweets for a user.
+ *
+ * @param int $user_id The Elgg user GUID
+ * @param array $options
+ */
+function twitter_api_fetch_tweets($user_guid, $options=array()) {
+	// check admin settings
+	$consumer_key = elgg_get_plugin_setting('consumer_key', 'twitter_api');
+	$consumer_secret = elgg_get_plugin_setting('consumer_secret', 'twitter_api');
+	if (!($consumer_key && $consumer_secret)) {
+		return FALSE;
+	}
+
+	// check user settings
+	$access_key = elgg_get_plugin_user_setting('access_key', $user_guid, 'twitter_api');
+	$access_secret = elgg_get_plugin_user_setting('access_secret', $user_guid, 'twitter_api');
+	if (!($access_key && $access_secret)) {
+		return FALSE;
+	}
+
+	// fetch tweets
+	$api = new TwitterOAuth($consumer_key, $consumer_secret, $access_key, $access_secret);
+	return $api->get('statuses/user_timeline', $options);
+}
+
+/**
+ * Register as public pages for walled garden.
+ *
+ * @param unknown_type $hook
+ * @param unknown_type $type
+ * @param unknown_type $return_value
+ * @param unknown_type $params
+ */
+function twitter_api_public_pages($hook, $type, $return_value, $params) {
+	$return_value[] = 'twitter_api/forward';
+	$return_value[] = 'twitter_api/login';
+
+	return $return_value;
+}