Add ActivityPub BaseWriter

app/Util/ActivityPub/Writer/BaseWriter.php

@@ -0,0 +1,136 @@
+<?php
+
+namespace App\Util\ActivityPub\Writer;
+
+use App\Util\ActivityPub\DiscoverActor;
+
+class BaseWriter {
+
+    protected $context = 'https://www.w3.org/ns/activitystreams';
+    protected $activities = ['Announce','Create','Follow','Like'];
+    protected $audiences = ['public', 'unlisted', 'private', 'direct'];
+    protected $audience = 'public';
+    protected $actors = ['Person'];
+    protected $objects = ['Image','Note'];
+    protected $verb;
+    protected $sourceActivity;
+    protected $activity;
+    protected $profile;
+    protected $to = [];
+    protected $cc = [];
+    protected $bcc = [];
+    protected $response;
+    protected $publishedAt;
+
+    public static function build()
+    {
+        return (new self);
+    }
+
+    public function setContext($context)
+    {
+        $this->context = $context;
+        return $this;
+    }
+
+    public function setActor($profile)
+    {
+        $this->actor = $profile;
+        return $this;
+    }
+
+    public function setActorActivity($activity)
+    {
+        $this->activity = $activity;
+        $this->setPublishedAt($activity->created_at->format('Y-m-d\Th:i:s\Z'));
+        return $this;
+    }
+
+    public function setTo($audience)
+    {
+        $this->to = $audience;
+        return $this;
+    }
+
+    public function setCc($audience)
+    {
+        $this->cc = $audience;
+        return $this;
+    }
+
+    public function setBcc($audience)
+    {
+        $this->bcc = $audience;
+        return $this;
+    }
+
+    public function setPublishedAt($timestamp)
+    {
+        $this->publishedAt = $timestamp;
+        return $this;
+    }
+
+    public function audience($audience)
+    {
+        $this->setAudience($audience);
+        $this->buildAudience();
+        return $this;
+    }
+
+    public function setAudience($audience)
+    {
+        if(in_array($audience, $this->audience)) {
+            $this->audience = $audience;
+        }
+        return $this;
+    }
+
+    public function buildAudience()
+    {
+        switch ($this->audience) {
+          case 'public':
+            $this->to = [
+              $this->context . '#Public'
+            ];
+            $this->cc = [
+              $this->actor->permalink('/followers')
+            ];
+            break;
+
+          case 'unlisted':
+            $this->to = [
+              $this->actor->permalink('/followers')
+            ];
+            $this->cc = [
+              $this->context . '#Public'
+            ];
+            break;
+
+          case 'private':
+            $this->to = [
+              $this->actor->permalink('/followers')
+            ];
+            break;
+          
+          default:
+            # code...
+            break;
+        }
+        return $this;
+    }
+
+    public function get()
+    {
+        return $this->getJson();
+    }
+
+    public function getJson()
+    {
+        return json_encode($this->response);
+    }
+
+    public function getArray()
+    {
+        return $this->response;
+    }
+}