From 20eaa9adf0f3228798342fd4108d542582ebc8c9 Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Tue, 15 Sep 2026 14:35:32 +0100 Subject: [PATCH 1/7] Create backend and frontend directories with important files --- .gitignore | 1 + chat-app/backend/package-lock.json | 913 +++++++++++++++++++++++++++++ chat-app/backend/package.json | 17 + chat-app/backend/server.js | 26 + chat-app/frontend/index.html | 19 + chat-app/frontend/script.js | 9 + chat-app/frontend/style.css | 0 7 files changed, 985 insertions(+) create mode 100644 .gitignore create mode 100644 chat-app/backend/package-lock.json create mode 100644 chat-app/backend/package.json create mode 100644 chat-app/backend/server.js create mode 100644 chat-app/frontend/index.html create mode 100644 chat-app/frontend/script.js create mode 100644 chat-app/frontend/style.css diff --git a/.gitignore b/.gitignore new file mode 100644 index 00000000..40b878db --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules/ \ No newline at end of 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"^5.2.1" + } +} diff --git a/chat-app/backend/server.js b/chat-app/backend/server.js new file mode 100644 index 00000000..32bb0866 --- /dev/null +++ b/chat-app/backend/server.js @@ -0,0 +1,26 @@ +import express from "express"; +import cors from "cors"; + +const app = express(); +const port = 3000; + +const messages = []; + +app.use(express.json()); +app.use(cors()); + +app.get("/messages", (req, res) => { + res.json(messages); +}); + +app.post("/messages", (req, res) => { + const message = req.body; + + messages.push(message); + + res.json(message); +}); + +app.listen(port, () => { + console.error(`Chat server listening on port ${port}`); +}); \ No newline at end of file diff --git a/chat-app/frontend/index.html b/chat-app/frontend/index.html new file mode 100644 index 00000000..bddbcf07 --- /dev/null +++ b/chat-app/frontend/index.html @@ -0,0 +1,19 @@ + + + + + Chat App + + + +

Chat App

+ +
+ + + + + + + + \ No newline at end of file diff --git a/chat-app/frontend/script.js b/chat-app/frontend/script.js new file mode 100644 index 00000000..8fcd6fe2 --- /dev/null +++ b/chat-app/frontend/script.js @@ -0,0 +1,9 @@ +async function getMessages() { + const response = await fetch("http://172.17.64.211:3000/messages"); + + const messages = await response.json(); + + console.log(messages); +} + +getMessages(); \ No newline at end of file diff --git a/chat-app/frontend/style.css b/chat-app/frontend/style.css new file mode 100644 index 00000000..e69de29b From cc505907255e5e137391f24b6d1ed2aabd018749 Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Wed, 16 Sep 2026 16:04:04 +0100 Subject: [PATCH 2/7] Make sure the backend and frontend can communicate --- chat-app/backend/server.js | 2 +- chat-app/frontend/script.js | 33 +++++++++++++++++++++++++++++++-- 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/chat-app/backend/server.js b/chat-app/backend/server.js index 32bb0866..efbb81df 100644 --- a/chat-app/backend/server.js +++ b/chat-app/backend/server.js @@ -23,4 +23,4 @@ app.post("/messages", (req, res) => { app.listen(port, () => { console.error(`Chat server listening on port ${port}`); -}); \ No newline at end of file +}); diff --git a/chat-app/frontend/script.js b/chat-app/frontend/script.js index 8fcd6fe2..dd5939b5 100644 --- a/chat-app/frontend/script.js +++ b/chat-app/frontend/script.js @@ -3,7 +3,36 @@ async function getMessages() { const messages = await response.json(); - console.log(messages); + const messagesContainer = document.getElementById("messages"); + + messagesContainer.innerHTML = ""; + + messages.forEach((message) => { + const messageElement = document.createElement("p"); + + messageElement.textContent = message.text; + + messagesContainer.appendChild(messageElement); + }); } -getMessages(); \ No newline at end of file +getMessages(); + +const messageInput = document.getElementById("messageInput"); + +sendButton.addEventListener("click", async () => { + const messageText = messageInput.value; + + await fetch("http://172.17.64.211:3000/messages", { + method: "POST", + headers: { + "Content-Type": "application/json", + }, + body: JSON.stringify({ + text: messageText, + }), + }); + await getMessages(); + messageInput.value = ""; +}); +setInterval(getMessages, 1000); From 9740b5786f7c28bdac4f1cf2edda508dfbd1e773 Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Mon, 21 Sep 2026 09:43:37 +0100 Subject: [PATCH 3/7] Add data validation and .gitignore file. --- chat-app/.gitignore | 1 + chat-app/backend/server.js | 24 ++++++++++++-- chat-app/frontend/index.html | 7 +++- chat-app/frontend/script.js | 62 ++++++++++++++++++++++++++++++------ chat-app/frontend/style.css | 52 ++++++++++++++++++++++++++++++ 5 files changed, 132 insertions(+), 14 deletions(-) create mode 100644 chat-app/.gitignore diff --git a/chat-app/.gitignore b/chat-app/.gitignore new file mode 100644 index 00000000..3c3629e6 --- /dev/null +++ b/chat-app/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/chat-app/backend/server.js b/chat-app/backend/server.js index efbb81df..6a0e074a 100644 --- a/chat-app/backend/server.js +++ b/chat-app/backend/server.js @@ -1,3 +1,4 @@ +console.log("SERVER.JS IS RUNNING"); import express from "express"; import cors from "cors"; @@ -14,13 +15,30 @@ app.get("/messages", (req, res) => { }); app.post("/messages", (req, res) => { - const message = req.body; + const { username, text } = req.body; + + if (!username || username.trim() === "") { + return res.status(400).json({ + error: "Username is required", + }); + } + + if (!text || text.trim() === "") { + return res.status(400).json({ + error: "Message is required", + }); + } + + const message = { + username: username.trim(), + text: text.trim(), + }; messages.push(message); - res.json(message); + res.status(201).json(message); }); app.listen(port, () => { - console.error(`Chat server listening on port ${port}`); + console.log(`Chat server listening on port ${port}`); }); diff --git a/chat-app/frontend/index.html b/chat-app/frontend/index.html index bddbcf07..5a25fb23 100644 --- a/chat-app/frontend/index.html +++ b/chat-app/frontend/index.html @@ -3,6 +3,7 @@ Chat App + @@ -10,10 +11,14 @@

Chat App

- + + + +

+ \ No newline at end of file diff --git a/chat-app/frontend/script.js b/chat-app/frontend/script.js index dd5939b5..2a028a7a 100644 --- a/chat-app/frontend/script.js +++ b/chat-app/frontend/script.js @@ -1,38 +1,80 @@ +const serverUrl = "http://localhost:3000"; + +const usernameInput = document.getElementById("usernameInput"); +const messageInput = document.getElementById("messageInput"); +const sendButton = document.getElementById("sendButton"); +const messagesContainer = document.getElementById("messages"); +const errorMessage = document.getElementById("errorMessage"); + async function getMessages() { - const response = await fetch("http://172.17.64.211:3000/messages"); + const response = await fetch(`${serverUrl}/messages`); - const messages = await response.json(); + if (!response.ok) { + console.error("Server returned:", response.status); + return; + } - const messagesContainer = document.getElementById("messages"); + const messages = await response.json(); messagesContainer.innerHTML = ""; messages.forEach((message) => { const messageElement = document.createElement("p"); - messageElement.textContent = message.text; + messageElement.textContent = `${message.username}: ${message.text}`; messagesContainer.appendChild(messageElement); }); } -getMessages(); +async function sendMessage() { + const username = usernameInput.value.trim(); + const messageText = messageInput.value.trim(); -const messageInput = document.getElementById("messageInput"); + + if (username === "") { + errorMessage.textContent = "Please enter your name."; + return; + } + + if (messageText === "") { + errorMessage.textContent = "Please enter a message."; + return; + } -sendButton.addEventListener("click", async () => { - const messageText = messageInput.value; + errorMessage.textContent = ""; - await fetch("http://172.17.64.211:3000/messages", { + + const response = await fetch(`${serverUrl}/messages`, { method: "POST", headers: { "Content-Type": "application/json", }, body: JSON.stringify({ + username: username, text: messageText, }), }); + if (!response.ok) { + const error = await response.json(); + errorMessage.textContent = error.error; + return; + } + await getMessages(); + messageInput.value = ""; + usernameInput.value = ""; +} + +sendButton.addEventListener("click", sendMessage); + +messageInput.addEventListener("keydown", (event) => { + if (event.key === "Enter") { + sendMessage(); + } }); -setInterval(getMessages, 1000); + +getMessages(); + +setInterval(getMessages, 1000); \ No newline at end of file diff --git a/chat-app/frontend/style.css b/chat-app/frontend/style.css index e69de29b..f8af5a2f 100644 --- a/chat-app/frontend/style.css +++ b/chat-app/frontend/style.css @@ -0,0 +1,52 @@ +body { + font-family: Arial, sans-serif; + background-color: #f5f5f5; + max-width: 600px; + margin: 40px auto; + padding: 20px; +} + +h1 { + text-align: center; +} + +#messages { + background-color: white; + border: 1px solid #ddd; + border-radius: 8px; + padding: 15px; + height: 300px; + overflow-y: auto; + margin-bottom: 15px; +} + +#messages p { + background-color: #f0f0f0; + padding: 10px; + border-radius: 6px; + margin: 8px 0; +} + +#usernameInput, +#messageInput { + padding: 10px; + border: 1px solid #ccc; + border-radius: 5px; + box-sizing: border-box; +} + +#usernameInput { + width: 100%; + margin-bottom: 10px; +} + +#messageInput { + width: 80%; +} + +#sendButton { + padding: 10px 15px; + border: none; + border-radius: 5px; + cursor: pointer; +} \ No newline at end of file From 8f758f19d57ebaefb42619deb2d59dd9b94c6903 Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Fri, 25 Sep 2026 20:26:31 +0100 Subject: [PATCH 4/7] Implement script.js and server.js with a style to the frontend. --- chat-app/backend/server.js | 34 ++++++++++++++++++++++--- chat-app/frontend/index.html | 8 ++++++ chat-app/frontend/script.js | 48 +++++++++++++++++++++++++++--------- chat-app/frontend/style.css | 2 +- 4 files changed, 75 insertions(+), 17 deletions(-) diff --git a/chat-app/backend/server.js b/chat-app/backend/server.js index 6a0e074a..695428da 100644 --- a/chat-app/backend/server.js +++ b/chat-app/backend/server.js @@ -1,4 +1,3 @@ -console.log("SERVER.JS IS RUNNING"); import express from "express"; import cors from "cors"; @@ -6,16 +5,35 @@ const app = express(); const port = 3000; const messages = []; +const callbacksForNewMessages = []; app.use(express.json()); app.use(cors()); app.get("/messages", (req, res) => { - res.json(messages); + const since = req.query.since; + + let messagesToSend; + + if (since === undefined) { + messagesToSend = messages; + } else { + const sinceId = Number(since); + + messagesToSend = messages.filter( + (message) => message.id > sinceId + ); + } + + if (messagesToSend.length === 0) { + callbacksForNewMessages.push((value) => res.json(value)); + } else { + res.json(messagesToSend); + } }); app.post("/messages", (req, res) => { - const { username, text } = req.body; + const { username, text, color } = req.body; if (!username || username.trim() === "") { return res.status(400).json({ @@ -30,15 +48,23 @@ app.post("/messages", (req, res) => { } const message = { + id: messages.length, username: username.trim(), text: text.trim(), + color: color, }; messages.push(message); + while (callbacksForNewMessages.length > 0) { + const callback = callbacksForNewMessages.pop(); + + callback([message]); + } + res.status(201).json(message); }); app.listen(port, () => { console.log(`Chat server listening on port ${port}`); -}); +}); \ No newline at end of file diff --git a/chat-app/frontend/index.html b/chat-app/frontend/index.html index 5a25fb23..9d9eab03 100644 --- a/chat-app/frontend/index.html +++ b/chat-app/frontend/index.html @@ -15,6 +15,14 @@

Chat App

+ +

diff --git a/chat-app/frontend/script.js b/chat-app/frontend/script.js index 2a028a7a..b7532388 100644 --- a/chat-app/frontend/script.js +++ b/chat-app/frontend/script.js @@ -1,13 +1,19 @@ const serverUrl = "http://localhost:3000"; - +let lastMessageId = null; const usernameInput = document.getElementById("usernameInput"); const messageInput = document.getElementById("messageInput"); +const colorInput = document.getElementById("colorInput"); const sendButton = document.getElementById("sendButton"); const messagesContainer = document.getElementById("messages"); const errorMessage = document.getElementById("errorMessage"); async function getMessages() { - const response = await fetch(`${serverUrl}/messages`); + const url = + lastMessageId === null + ? `${serverUrl}/messages` + : `${serverUrl}/messages?since=${lastMessageId}`; + + const response = await fetch(url); if (!response.ok) { console.error("Server returned:", response.status); @@ -15,23 +21,43 @@ async function getMessages() { } const messages = await response.json(); - - messagesContainer.innerHTML = ""; - + messages.forEach((message) => { const messageElement = document.createElement("p"); - messageElement.textContent = `${message.username}: ${message.text}`; + messageElement.style.color = message.color; + + // const likeButton = document.createElement("button"); + // likeButton.textContent = `👍 ${message.likes}`; + // likeButton.addEventListener("click", () => { + // likeMessage(message.id); + // }); messagesContainer.appendChild(messageElement); + // messagesContainer.appendChild(likeButton); }); + if (messages.length > 0) { + lastMessageId = messages[messages.length - 1].id; + } + getMessages(); } +// async function likeMessage(messageId) { +// const response = await fetch(`${serverUrl}/messages/${messageId}/like`, { +// method: "POST", +// }); + +// if (!response.ok) { +// console.error("Could not like message"); +// return; +// } +// } + async function sendMessage() { const username = usernameInput.value.trim(); const messageText = messageInput.value.trim(); + const color = colorInput.value; - if (username === "") { errorMessage.textContent = "Please enter your name."; return; @@ -44,7 +70,6 @@ async function sendMessage() { errorMessage.textContent = ""; - const response = await fetch(`${serverUrl}/messages`, { method: "POST", headers: { @@ -53,16 +78,15 @@ async function sendMessage() { body: JSON.stringify({ username: username, text: messageText, + color: color, }), }); - if (!response.ok) { + if (!response.ok) { const error = await response.json(); errorMessage.textContent = error.error; return; } - await getMessages(); - messageInput.value = ""; usernameInput.value = ""; } @@ -77,4 +101,4 @@ messageInput.addEventListener("keydown", (event) => { getMessages(); -setInterval(getMessages, 1000); \ No newline at end of file + diff --git a/chat-app/frontend/style.css b/chat-app/frontend/style.css index f8af5a2f..1fb974ec 100644 --- a/chat-app/frontend/style.css +++ b/chat-app/frontend/style.css @@ -1,6 +1,6 @@ body { font-family: Arial, sans-serif; - background-color: #f5f5f5; + background-color: #aaf8f8; max-width: 600px; margin: 40px auto; padding: 20px; From e09f9255847178ef764422ad31f26bda3dc45702 Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Sat, 26 Sep 2026 14:08:53 +0100 Subject: [PATCH 5/7] Add Dockerfile to the backend. --- chat-app/backend/Dockerfile | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 chat-app/backend/Dockerfile diff --git a/chat-app/backend/Dockerfile b/chat-app/backend/Dockerfile new file mode 100644 index 00000000..0c6b97ee --- /dev/null +++ b/chat-app/backend/Dockerfile @@ -0,0 +1,11 @@ +FROM node:alpine + +ENV NODE_ENV=production + +COPY . /app + +WORKDIR /app + +RUN npm --omit=dev ci + +ENTRYPOINT ["node", "server.js"] \ No newline at end of file From 0bab5fc0cb4c1aa5676937d3c69c63e6c4f1fd9e Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Sat, 26 Sep 2026 15:42:38 +0100 Subject: [PATCH 6/7] Fix deployed backend URL --- chat-app/frontend/script.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chat-app/frontend/script.js b/chat-app/frontend/script.js index b7532388..28f443d1 100644 --- a/chat-app/frontend/script.js +++ b/chat-app/frontend/script.js @@ -1,4 +1,4 @@ -const serverUrl = "http://localhost:3000"; +const serverUrl = "https://fithi-chat-app-backend.trainees.hosting.cyf.academy"; let lastMessageId = null; const usernameInput = document.getElementById("usernameInput"); const messageInput = document.getElementById("messageInput"); From 9742d7ecb186fa057c346038a080663b5b61661b Mon Sep 17 00:00:00 2001 From: Fithi Teklom Date: Sat, 26 Sep 2026 16:24:55 +0100 Subject: [PATCH 7/7] Add /route to confirm backend is working. --- chat-app/backend/server.js | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/chat-app/backend/server.js b/chat-app/backend/server.js index 695428da..96f09c9f 100644 --- a/chat-app/backend/server.js +++ b/chat-app/backend/server.js @@ -10,6 +10,10 @@ const callbacksForNewMessages = []; app.use(express.json()); app.use(cors()); +app.get("/", (req, res) => { + res.send("Chat backend is running!"); +}); + app.get("/messages", (req, res) => { const since = req.query.since;