<?php
class AvatarHelper extends Rails\ActionView\Helper
{
    protected $avatar_posts_registry = [];
    
    # id is an identifier for the object referencing this avatar; it's passed down
    # to the javascripts to implement blacklisting "click again to open".
    public function avatar(User $user, $id, array $html_options = array())
    {
        static $shown_avatars = array();
        static $posts_to_send = array();

        #if not @shown_avatars[user] then
            $shown_avatars[$user->id] = true;
            $posts_to_send[] = $user->avatar_post;
            $this->avatar_posts_registry[] = $user->avatar_post;
            $img = $this->imageTag($user->avatar_url() . "?" . strtotime($user->avatar_timestamp),
                                        array_merge(array('class' => "avatar", 'width' => $user->avatar_width, 'height' => $user->avatar_height), $html_options));
            return $this->linkTo($img,
                          array("post#show", 'id' => $user->avatar_post->id),
                          array('class' => "ca" . $user->avatar_post->id,
                          'onclick' => "return Post.check_avatar_blacklist(".$user->avatar_post->id.", ".$id.")"));
        #end
    }
    
    public function avatar_init(Post $post = null)
    {
        if (!$this->avatar_posts_registry) {
            return '';
        }
        
        $ret = '';
        foreach ($this->avatar_posts_registry as $post) {
            $ret .= 'Post.register('.$post->toJson().");\n";
        }
        $ret .= "Post.init_blacklisted();\n";
        
        return $ret;
    }
}