Initial commit to new repo

app/Http/Controllers/WebMentionsController.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Note;
+use Illuminate\Http\Request;
+use Illuminate\Http\Response;
+use App\Jobs\SendWebMentions;
+use App\Jobs\ProcessWebMention;
+use Jonnybarnes\IndieWeb\Numbers;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
+
+class WebMentionsController extends Controller
+{
+    /**
+     * Receive and process a webmention.
+     *
+     * @param  \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\Respone
+     */
+    public function receive(Request $request)
+    {
+        //first we trivially reject requets that lack all required inputs
+        if (($request->has('target') !== true) || ($request->has('source') !== true)) {
+            return new Response(
+                'You need both the target and source parameters',
+                400
+            );
+        }
+
+        //next check the $target is valid
+        $path = parse_url($request->input('target'))['path'];
+        $pathParts = explode('/', $path);
+
+        switch ($pathParts[1]) {
+            case 'notes':
+                //we have a note
+                $noteId = $pathParts[2];
+                $numbers = new Numbers();
+                $realId = $numbers->b60tonum($noteId);
+                try {
+                    $note = Note::findOrFail($realId);
+                    $this->dispatch(new ProcessWebMention($note, $request->input('source')));
+                } catch (ModelNotFoundException $e) {
+                    return new Response('This note doesn’t exist.', 400);
+                }
+
+                return new Response(
+                    'Webmention received, it will be processed shortly',
+                    202
+                );
+                break;
+            case 'blog':
+                return new Response(
+                    'I don’t accept webmentions for blog posts yet.',
+                    501
+                );
+                break;
+            default:
+                return new Response(
+                    'Invalid request',
+                    400
+                );
+                break;
+        }
+    }
+
+    /**
+     * Send a webmention.
+     *
+     * @param  \App\Note  $note
+     * @return array   An array of successful then failed URLs
+     */
+    public function send(Note $note)
+    {
+        //grab the URLs
+        $urlsInReplyTo = explode(' ', $note->in_reply_to);
+        $urlsNote = $this->getLinks($note->note);
+        $urls = array_filter(array_merge($urlsInReplyTo, $urlsNote)); //filter out none URLs
+        foreach ($urls as $url) {
+            $this->dispatch(new SendWebMentions($url, $note->longurl));
+        }
+    }
+
+    /**
+     * Get the URLs from a note.
+     */
+    private function getLinks($html)
+    {
+        $urls = [];
+        $dom = new \DOMDocument();
+        $dom->loadHTML($html);
+        $anchors = $dom->getElementsByTagName('a');
+        foreach ($anchors as $anchor) {
+            $urls[] = ($anchor->hasAttribute('href')) ? $anchor->getAttribute('href') : false;
+        }
+
+        return $urls;
+    }
+}