HW#9 Korol

HW9(http)/.gitignore

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+/node_modules

HW9(http)/app.js

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+const express = require('express');
+const router = require('./router.js');
+
+const app = express();
+const port = 3333;
+
+app.use('/', router);
+
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`)
+});

HW9(http)/controller.js

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+const model = require('./model.js');
+const model2 = require('./model2.js');
+
+class Controller {
+
+  async getList(req, res) {
+    const someIdFromReq = req.userId;
+    const list = await model.getList();
+    const extraData = await model2.getExtraDataById(someIdFromReq);
+    // If we work with a view, 
+    // we can generate a page based on the data from the model 
+    // and send it to the router already
+    res.locals.list = [...list, ...extraData];
+  }
+
+}
+
+module.exports = new Controller();

HW9(http)/middleware.js

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+const MiddlewareCreator = (controllerMethod) => {
+  return async(req, res, next)  => {
+      try {
+        await controllerMethod(req, res);
+        next();
+      } catch (e) {
+        // here we can handle errors
+        res.status(e.code || 500).send({ error: e.message || 'Something went wrong' });
+      }
+  };
+};
+
+module.exports = MiddlewareCreator;

HW9(http)/model.js

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+// here we calculate all the business logic
+
+const repository = require('./repository.js');
+
+class Model {
+
+  async getList() {
+    // processing the data depending on the phase of the moon
+    const listFromDb = await repository.getListFromDb();
+    return listFromDb.map((elem)=>'User Number ' + elem);
+  }
+
+}
+
+module.exports = new Model();

HW9(http)/model2.js

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+// here we calculate all the business logic
+
+const repository = require('./repository.js');
+
+class Model2 {
+
+  async getExtraDataById(id) {
+    // processing the data depending on the phase of the moon
+    const listFromDb = await repository.getExtraDataByIdFromDb(id);
+    return listFromDb.map((elem)=>'User Number ' + elem);
+  }
+
+
+}
+
+module.exports = new Model2();