Merge pull request #38 from CodeForPhilly/features/discourse-temp-webhooks

feat(discourse): port ad-hoc webhook handlers

Author: themightychris

site-root/discourse-webhook.php

@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * TODO: create an emergence-discourse repo, move the Discourse connector there,
+ * merge this into the connector class and have it publish events
+ *
+ * Also, this was built against the discourse webhook plugin. Discourse has webhooks
+ * built in now that may be slightly different and include signature validation. We
+ * should switch to using that and drop the plugin
+ */
+
+// settings
+$discourseHost = Emergence\Connectors\Discourse::$host;
+
+
+// only handle post_created for now
+$eventName = array_shift(Site::$pathStack);
+if ($eventName != 'post_created') {
+    die('Ignoring request, only handling /post_created');
+}
+
+
+// decode webhook payload
+list($post, $topic, $user) = json_decode(file_get_contents('php://input'), true);
+
+
+// log to tmp file
+file_put_contents('/tmp/last-discourse-webhook-payload', var_export([
+    '$post' => $post,
+    '$topic' => $topic,
+    '$user' => $user
+], true));
+
+
+// skip empty events that seem to get fired when topics get edited:
+if (empty($topic['title'])) {
+    die('Ignoring request, no topic title');
+}
+
+
+// skip private messages
+if ($topic['archetype'] == 'private_message') {
+    die('Ignoring request, private message');
+}
+
+
+// compose message for Slack
+$messageText = "New topic on $discourseHost";
+
+#// This doesn't work because the category is a number... we'll need to map them on our own to category names or slack rooms
+#if (!empty($topic['category'])) {
+#    $messageText .= " in $topic[category]";
+#}
+
+$messageText .= ": <http://$discourseHost/t/$post[topic_id]|$topic[title]>";
+$messageText .= "\n\n> " . str_replace("\n", "\n> ", $post['raw']);
+
+#// post full event payload to Slack
+#$messageText .= "\n\n\n" . json_encode(['post' => $post, 'topic' => $topic, 'user' => $user], JSON_PRETTY_PRINT);
+
+
+// post to slack
+$response = Emergence\Slack\API::request('chat.postMessage', [
+    'post' => [
+        'channel' => Emergence\Slack\API::getChannelId('general'),
+        'username' => "$user[username]@$discourseHost",
+        'icon_url' => str_replace('{size}', 100, "http://$discourseHost/$user[avatar_template]"),
+        'text' => $messageText,
+    ]
+]);
+
+
+// write slack response to output
+print_r($response);