Merge pull request 'TIST-31: Favorites model and ajax endpoint' (#23) from TIST-31 into develop

Reviewed-on: #23
Reviewed-by: greendavid004 <davidkatrinka1995@gmail.com>

apps/Ajax/ajax-actions.php

@@ -3,7 +3,8 @@
 use Lycoreco\Apps\Recipes\Models\{
     IngredientModel,
     RecipeModel,
-    RecipeUserMenu
+    RecipeUserMenu,
+    FavoriteModel
 };
 
 function get_ajax_error($message, $error_code = 500)
@@ -133,5 +134,57 @@ function ajax_search_ingredient()
     $result['count'] = count($ingredients);
     $result['result'] = $ingredients;
 
+    return $result;
+}
+
+function ajax_favorites()
+{
+    $recipe_id = $_POST['recipe_id'] ?? null;
+    $type = $_POST['type'] ?? 'add'; // add, remove
+
+    if (!CURRENT_USER) {
+        return get_ajax_error('You are not authorized', 401);
+    }
+    if (!isset($recipe_id)) {
+        return get_ajax_error("Missing 'recipe_id' parameter.", 400);
+    }
+    if($type != 'add' && $type != 'remove')
+    {
+        return get_ajax_error("'type' parameter can be only 'add' or 'remove'", 400);
+    }
+    $result = array();
+
+    $favorite = FavoriteModel::get(array(
+        [
+            'name'      => 'obj.recipe_id',
+            'type'      => '=',
+            'value'     => $recipe_id
+        ],
+        [
+            'name'      => 'obj.user_id',
+            'type'      => '=',
+            'value'     => CURRENT_USER->get_id()
+        ]
+    ));
+
+    if($type == 'remove') {
+        if($favorite) {
+            $favorite->delete();
+            $result['success'] = 'This recipe was removed from your favorite list';
+            return $result;
+        }
+        else {
+            return get_ajax_error("This recipe from your favorites list does not exist.", 400);
+        }
+    }
+
+    if(!$favorite)
+        $favorite = new FavoriteModel();
+
+    $favorite->field_user_id = CURRENT_USER->get_id();
+    $favorite->field_recipe_id = $recipe_id;
+    $favorite->save();
+
+    $result['success'] = 'You have successfully added the recipe to your favorites list';
     return $result;
 }

apps/Recipes/Models/FavoriteModel.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Lycoreco\Apps\Recipes\Models;
+
+use Lycoreco\Includes\Model\BaseModel;
+
+class FavoriteModel extends BaseModel
+{
+    public $field_recipe_id;
+    public $field_user_id;
+
+    static protected $table_name = 'recipe_favorites';
+    static protected $table_fields = [
+        'id'            => 'int',
+        'recipe_id'     => 'int',
+        'user_id'       => 'int',
+    ];
+
+    public static function init_table()
+    {
+        $result = db_query('CREATE TABLE ' . static::$table_name . ' (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+
+            recipe_id INT NOT NULL,
+            user_id INT NOT NULL,
+
+            FOREIGN KEY (recipe_id) REFERENCES recipes(id) ON DELETE CASCADE,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+        );');
+        return $result;
+    }
+
+    public function valid()
+    {
+        $recipe = RecipeModel::get(array(
+            [
+                'name'      => 'obj.id',
+                'type'      => '=',
+                'value'     => $this->field_recipe_id
+            ]
+        ));
+        if(!$recipe)
+            return ['Recipe does not exist'];
+
+        return true;
+    }
+}

apps/Recipes/Models/RecipeUserMenu.php

@@ -50,7 +50,7 @@ class RecipeUserMenu extends BaseModel
             ]
         ));
         if(!$recipe)
-            return ['Recipe is not exists'];
+            return ['Recipe does not exist'];
 
         return true;
     }