Add service api handler for Wall.getPost

ServiceAPI/Wall.php

@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+namespace openvk\ServiceAPI;
+use openvk\Web\Models\Entities\User;
+use openvk\Web\Models\Repositories\Posts;
+
+class Wall implements Handler
+{
+    protected $user;
+    protected $posts;
+    
+    function __construct(?User $user)
+    {
+        $this->user  = $user;
+        $this->posts = new Posts;
+    }
+    
+    function getPost(int $id, callable $resolve, callable $reject): void
+    {
+        $post = $this->posts->get($id);
+        if(!$post || $post->isDeleted())
+            $reject("No post with id=$id");
+        
+        $res = (object) [];
+        $res->id     = $post->getId();
+        $res->wall   = $post->getTargetWall();
+        $res->author = (($owner = $post->getOwner())) instanceof User
+                       ? ($owner->getId())
+                       : ($owner->getId() * -1);
+        
+        if($post->isSigned())
+            $res->signedOffBy = $post->getOwnerPost();
+        
+        $res->pinned    = $post->isPinned();
+        $res->sponsored = $post->isAd();
+        $res->nsfw      = $post->isExplicit();
+        $res->text      = $post->getText();
+        
+        $res->likes = [
+            "count"   => $post->getLikesCount(),
+            "hasLike" => $post->hasLikeFrom($this->user),
+            "likedBy" => [],
+        ];
+        foreach($post->getLikers() as $liker) {
+            $res->likes["likedBy"][] = [
+                "id"     => $liker->getId(),
+                "url"    => $liker->getURL(),
+                "name"   => $liker->getCanonicalName(),
+                "avatar" => $liker->getAvatarURL(),
+            ];
+        }
+        
+        $res->created = (string) $post->getPublicationTime();
+        $res->canPin  = $post->canBePinnedBy($this->user);
+        $res->canEdit = $res->canDelete = $post->canBeDeletedBy($this->user);
+        
+        $resolve((array) $res);
+    }
+}

Web/Models/Entities/Postable.php

@@ -84,6 +84,18 @@ abstract class Postable extends Attachable
         ]));
     }
     
+    // TODO add pagination
+    function getLikers(): \Traversable
+    {
+        $sel = DB::i()->getContext()->table("likes")->where([
+            "model"  => static::class,
+            "target" => $this->getRecord()->id,
+        ]);
+        
+        foreach($sel as $like)
+            yield (new Users)->get($like->origin);
+    }
+    
     function toggleLike(User $user): void
     {
         $searchData = [