167942408-(article)-get-related-articles

 - add get related articles route
 - add get related articles controller
 - add validation
[Delivers #167942408]

controllers/articles/index.js

@@ -1,9 +1,12 @@
+import Sequelize from 'sequelize';
 import {
   uploadImage, deleteImage, findRatedArticle, storeRating
 } from '../../utils';
 import db from '../../db/models';
 import Notification from '../../utils/notifications';
 
+const { Op } = Sequelize;
+
 export default {
   getArticles: async (req, res) => {
     try {
@@ -679,5 +682,42 @@ export default {
         error: e.message
       });
     }
+  },
+
+  getRelatedArticles: async (req, res) => {
+    const { slug, category } = req.params;
+    try {
+      const foundCategory = await db.Category.findOne(
+        { where: { name: category } }
+      );
+      if (!foundCategory) {
+        return res.status(404).json({
+          error: 'Category not found'
+        });
+      }
+      const foundArticles = await db.Article.findAndCountAll(
+        {
+          limit: 2,
+          where: {
+            categoryId: foundCategory.id,
+            slug: {
+              [Op.ne]: slug
+            }
+          },
+          attributes: ['title', 'slug', 'image', 'createdAt', 'categoryId', 'description'],
+          order: [
+            ['createdAt', 'DESC']
+          ]
+        }
+      );
+      return res.status(200).json({
+        articles: foundArticles
+      });
+    } catch (e) {
+      console.log('the error', e);
+      return res.status(500).json({
+        error: 'somthing went wrong'
+      });
+    }
   }
 };

db/models/ArticleTag.js

@@ -3,7 +3,8 @@ module.exports = (sequelize) => {
   }, {});
   ArticleTag.associate = (models) => {
     ArticleTag.belongsTo(models.Article, {
-      foreignKey: 'articleId'
+      foreignKey: 'articleId',
+      as: 'article'
     });
 
     ArticleTag.belongsTo(models.Tag, {

routes/v1/articles.js

@@ -160,4 +160,11 @@ router.get(
   Article.getBookmarkedArticles
 );
 
+router.get(
+  '/:slug/:category/related',
+  Validation.category,
+  Validation.articleSlug,
+  Article.getRelatedArticles,
+);
+
 export default router;

validators/articles/index.js

@@ -1,4 +1,5 @@
-import { messages, validatorInstance } from '../../utils';
+import { sanitize } from 'indicative';
+import { messages, validatorInstance, sanitizeRules } from '../../utils';
 import db from '../../db/models';
 
 export default {
@@ -246,4 +247,22 @@ export default {
       });
     }
   },
+
+  category: async (req, res, next) => {
+    const rules = {
+      category: 'string|required'
+    };
+
+    const data = req.params;
+
+    sanitize(data, sanitizeRules);
+    try {
+      await validatorInstance.validateAll(data, rules, messages);
+      next();
+    } catch (e) {
+      return res.status(400).json({
+        error: e,
+      });
+    }
+  },
 };