initial commit

src/backend/api.ts

@@ -0,0 +1,106 @@
+var util = require('util');
+var {Router} = require('express');
+
+// Our API for demos only
+import {fakeDataBase} from './db';
+import {fakeDemoRedisCache} from './cache';
+
+// you would use cookies/token etc
+var USER_ID = 'f9d98cf1-1b96-464e-8755-bcc2a5c09077'; // hardcoded as an example
+
+// Our API for demos only
+export function serverApi(req, res) {
+  let key = USER_ID + '/data.json';
+  let cache = fakeDemoRedisCache.get(key);
+  if (cache !== undefined) {
+    console.log('/data.json Cache Hit');
+    return res.json(cache);
+  }
+  console.log('/data.json Cache Miss');
+
+  fakeDataBase.get()
+    .then(data => {
+      fakeDemoRedisCache.set(key, data);
+      return data;
+    })
+    .then(data => res.json(data));
+}
+
+
+// todo API
+
+var COUNT = 4;
+var TODOS = [
+  { id: 0, value: 'finish example', created_at: new Date(), completed: false },
+  { id: 1, value: 'add tests',      created_at: new Date(), completed: false },
+  { id: 2, value: 'include development environment', created_at: new Date(), completed: false },
+  { id: 3, value: 'include production environment',  created_at: new Date(), completed: false }
+];
+
+export function createTodoApi() {
+
+  var router = Router()
+
+  router.route('/todos')
+    .get(function(req, res) {
+      console.log('GET');
+      // 70ms latency
+      setTimeout(function() {
+        res.json(TODOS);
+      }, 0);
+
+    })
+    .post(function(req, res) {
+      console.log('POST', util.inspect(req.body, {colors: true}));
+      var todo = req.body;
+      if (todo) {
+        TODOS.push({
+          value: todo.value,
+          created_at: new Date(),
+          completed: todo.completed,
+          id: COUNT++
+        });
+        return res.json(todo);
+      }
+
+      return res.end();
+    });
+
+  router.param('todo_id', function(req, res, next, todo_id) {
+    // ensure correct prop type
+    var id = Number(req.params.todo_id);
+    try {
+      var todo = TODOS[id];
+      req.todo_id = id;
+      req.todo = TODOS[id];
+      next();
+    } catch (e) {
+      next(new Error('failed to load todo'));
+    }
+  });
+
+  router.route('/todos/:todo_id')
+    .get(function(req, res) {
+      console.log('GET', util.inspect(req.todo, {colors: true}));
+
+      res.json(req.todo);
+    })
+    .put(function(req, res) {
+      console.log('PUT', util.inspect(req.body, {colors: true}));
+
+      var index = TODOS.indexOf(req.todo);
+      var todo = TODOS[index] = req.body;
+
+      res.json(todo);
+    })
+    .delete(function(req, res) {
+      console.log('DELETE', req.todo_id);
+
+      var index = TODOS.indexOf(req.todo);
+      TODOS.splice(index, 1);
+
+      res.json(req.todo);
+    });
+
+  return router;
+};