Initial commit

blog/comments/.gitignore

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+node_modules/

blog/comments/index.js

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+const { randomBytes } = require('crypto');
+const express = require('express');
+const bodyParser = require('body-parser');
+const cors = require('cors');
+const axios = require('axios');
+
+const app = express();
+app.use(bodyParser.json());
+app.use(cors());
+
+const commentsByPostID = {};
+
+app.get('/posts/:id/comments', (req, res) => {
+  res.send(commentsByPostID[req.params.id] || []);
+});
+
+app.post('/posts/:id/comments', async (req, res) => {
+  const commentID = randomBytes(4).toString('hex'); 
+  const { content } = req.body;
+
+  const comments = commentsByPostID[req.params.id] ||  [];
+
+  comments.push({ id: commentID, content, status: 'pending' })
+  
+  commentsByPostID[req.params.id] = comments;
+
+  await axios.post('http://localhost:4005/events', {
+    type: 'CommentCreated',
+    data: {
+      id: commentID, content, postId: req.params.id, status: 'pending'
+    }
+  }).catch(error => console.log(error));
+
+  res.status(201).send(comments);
+});
+
+app.post('/events', async (req, res) => {
+  console.log('Received Event', req.body.type);
+  const { type, data } = req.body;
+
+  if(type === 'CommentModerated') {
+    const { postId, id, status, content } = data;
+    const comments = commentsByPostID[postId];
+    const comment = comments.find(comment => comment.id === id);
+    comment.status = status;
+
+    await axios.post('http://localhost:4005/events', {
+      type: 'CommentUpdated',
+      data: { id, status, postId, content }
+    }).catch(error => console.log(error));
+  }
+
+  res.send({});
+});
+
+app.listen(4001, () => {
+  console.log('Listening on 4001');
+});

blog/comments/package.json

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+{
+  "name": "comments",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "nodemon index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^0.21.1",
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "nodemon": "^2.0.7"
+  }
+}