WM5 | AISHA_ATHMAN_LALI | MODULE_SERVERS | WEEK_2 | CHAT_SERVER | LEVEL-1-2-3

chat-server/package.json

@@ -11,7 +11,9 @@
     "start": "node server.js"
   },
   "dependencies": {
-    "cors": "^2.8.5"
+    "cors": "^2.8.5",
+    "expres": "^0.0.5",
+    "express": "^4.19.2"
   },
   "repository": {
     "url": "https://glitch.com/edit/#!/hello-express"

chat-server/server.js

@@ -7,14 +7,15 @@ import { fileURLToPath } from "url";
 const app = express();
 
 app.use(cors());
+app.use(express.json());
 
 // Get __dirname in ES module
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const welcomeMessage = {
   id: 0,
-  from: "Bart",
-  text: "Welcome to CYF chat system!",
+  from: "Aisha",
+  text: "Welcome to my chat system!",
 };
 
 //This array is our "data store".
@@ -25,6 +26,71 @@ app.get("/", (request, response) => {
   response.sendFile(__dirname + "/index.html");
 });
 
+// To read all the messages
+app.get("/messages", (request, response) => {
+  response.send(messages);
+});
+
+//To read one specific message  by Id
+app.get("/messages/:id", (request, response) => {
+  const id = Number(request.params.id);
+  const chosenMessage = messages.find((message) => message.id === id);
+  if (chosenMessage) {
+    response.send(chosenMessage);
+  } else {
+    response.status(404).send({ error: "Message not found" });
+  }
+});
+
+//To create a new message
+app.post("/messages", (request, response) => {
+  const { from, text } = request.body;
+
+  if (!from || !text) {
+    return response
+      .status(400)
+      .send({ error: "'from' and 'text' fields are required" });
+  }
+  const newMessage = {
+    id: messages.length,
+    from: request.body.from,
+    text: request.body.text,
+  };
+  messages.push(newMessage);
+  response.status(201).send(newMessage);
+});
+
+//To delete a message by Id
+app.delete("/messages/:id", (request, response) => {
+  const id = Number(request.params.id);
+  const messageIndex = messages.findIndex((message) => message.id === id);
+  if (messageIndex !== -1) {
+    messages.splice(messageIndex, 1);
+    response.status(204).send();
+  } else {
+    response.status(404).json({ error: "Message not found" });
+  }
+});
+
+//To search a message by text substring
+app.get("/messages/search", (request, response) => {
+  const searchTerm = request.query.text;
+  if(!searchTerm){
+    return response
+      .status(400)
+      .send({ error: "Query parameter 'text' is required" });
+  }
+  const filteredMessages = messages.filter(message => message.text.includes(searchTerm));
+  response.send(filteredMessages);
+});
+
+// To get the most recent 10 messages
+app.get("/messages/latest", (request, response) => {
+  const latestMessages = messages.slice(-10).reverse();
+  response.send(latestMessages);
+});
+
+
 app.listen(process.env.PORT, () => {
   console.log(`listening on PORT ${process.env.PORT}...`);
-});
+});