More work to completing the Like Module functionality.

Changed name from Love Post to Like Post.

modules/likes/info.yaml

@@ -0,0 +1,8 @@
+name: Likes
+url: http://chyrp.net/
+version: 1.0
+description: Allow users to like/unlike a post.
+author:
+  name: the Chyrp team
+  url: http://chyrp.net/
+confirm: Are you sure you want to remove all Post Likes from the database?

modules/likes/likes.php

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+<?php
+    require_once "model.Like.php";
+
+    class Likes extends Modules {
+        static function __install() {
+            Like::install();
+        }
+
+        static function __uninstall($confirm) {
+            if ($confirm)
+                Like::uninstall();
+        }
+
+        static function route_add_like() {
+        	$post = new Post($_POST['post_id'], array("drafts" => true));
+        	Like::add($post);
+        }
+
+        static function route_remove_like() {
+        	Like::delete();	
+        }
+
+        public function post($post) {
+            $post->has_many[] = "likes";
+        }
+    }

modules/likes/model.Like.php

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+<?php
+    /**
+     * Class: Love
+     * The model for the love SQL table.
+     *
+     * See Also:
+     *     <Model>
+     */
+    class Like extends Model {
+
+         /**
+         * Function: add
+         * Adds a like to the database.
+         *
+         * Parameters:
+         *     $post - The <Post> they're liking
+         */
+        static function add($post) {
+            $sql = SQL::current();
+            $visitor = Visitor::current();
+            $likes = $sql->select("likes",
+                            array("user_id", "likes"),
+                            array("post_id" => $post->id));
+
+            $user_ids = unserialize($likes->user_id);
+            if (!in_array($visitor->id, $user_ids)) {
+                array_push($user_ids, $visitor->id);
+                $users = serialize($user_ids);
+                $sql->update("likes", array(null, "post_id" => $post,
+                                                  "user_id" => $user_ids,
+                                                  "likes" => $likes->likes + 1));
+            } else
+                self::unlike($post);
+        }
+
+        static function unlike($post) {
+            $sql = SQL::current();
+            $visitor = Visitor::current();
+            $likes = $sql->select("likes",
+                            array("user_id", "likes"),
+                            array("post_id" => $post->id));
+
+            $loves = unserialize($loves);
+            $unliked = false;
+
+            foreach ($loves as $key => $value) {
+                if ($unliked == false)
+                    if ($value == $visitor->id) {
+                        unset($loves[$key]);
+                        $unliked = true;
+                    }
+            }
+            $loves = serialize($loves);
+            $sql->update("posts",
+                   array("id" => $post->id),
+                   array("love_user_id" => $loves));
+        }
+
+        static function install() {
+            SQL::current()->query("CREATE TABLE IF NOT EXISTS __likes (
+                                    id INTEGER PRIMARY KEY AUTO_INCREMENT,
+                                    post_id INTEGER DEFAULT 0,
+                                    user_id VARCHAR(400) DEFAULT 0,
+                                    total_likes INTEGER DEFAULT 0
+                                   ) DEFAULT CHARSET=utf8");
+
+            Group::add_permission("like_posts", "Like Posts");
+            Group::add_permission("unlike_posts", "Unlike Posts");
+        }
+
+        static function uninstall() {
+            SQL::current()->query("DROP TABLE __likes");
+            Group::remove_permission("like_posts");
+            Group::remove_permission("unlike_posts");
+        }
+
+    }