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Commit cd45e483 authored by Sebastian Ebert's avatar Sebastian Ebert
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webapp for 2nd exercise

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tools/webapp/app.py 0 → 100644
+ 60
− 0
View file @ cd45e483
from flask import Flask, render_template, request, jsonify
import paho.mqtt.client as mqtt
# Flask app initialization
app = Flask(__name__)
# MQTT Configuration
BROKER = "localhost" # Replace with your broker
PUBLISH_TOPIC = "colors/publish"
LOG_TOPIC = "colors/log"
mqtt_client = mqtt.Client()
# On connect, subscribe to the log topic
def on_connect(client, userdata, flags, rc):
print(f"Connected to MQTT Broker with result code {rc}")
mqtt_client.subscribe(LOG_TOPIC)
# On receiving a message, print it
log_messages = []
def on_message(client, userdata, msg):
global log_messages
message = msg.payload.decode()
log_messages.append(message)
# Assign MQTT event handlers
mqtt_client.on_connect = on_connect
mqtt_client.on_message = on_message
# Connect to the broker
mqtt_client.connect(BROKER, 1884, 60)
mqtt_client.loop_start()
# Route for the main page
@app.route('/')
def index():
# List of colors to display as buttons
colors = ["red", "blue", "green"]
return render_template('index.html', colors=colors)
# Route to handle button press
@app.route('/publish', methods=['POST'])
def publish():
color = request.json.get("color")
if color:
topic = f"/{color}" # Each color gets its own topic
mqtt_client.publish(topic, color)
return jsonify({"status": "success", "topic": topic, "color": color})
return jsonify({"status": "error"}), 400
# Route to fetch log messages
@app.route('/logs', methods=['GET'])
def get_logs():
return jsonify(log_messages)
if __name__ == '__main__':
app.run(debug=True)
tools/webapp/templates/index.html 0 → 100644
+ 139
− 0
View file @ cd45e483
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Selector</title>
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600&display=swap" rel="stylesheet">
<style>
body {
font-family: 'Inter', sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f9;
color: #333;
}
header {
background-color: #4a90e2;
color: white;
padding: 15px 20px;
text-align: center;
font-size: 24px;
font-weight: 600;
}
main {
max-width: 800px;
margin: 20px auto;
padding: 20px;
background: white;
box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
border-radius: 10px;
}
h1 {
font-size: 28px;
margin-bottom: 20px;
color: #4a90e2;
}
.buttons-container {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 15px;
}
.color-button {
display: inline-block;
width: 120px;
height: 120px;
border: none;
border-radius: 10px;
cursor: pointer;
font-size: 18px;
font-weight: 600;
color: white;
text-transform: capitalize;
transition: transform 0.2s, box-shadow 0.2s;
}
.color-button:hover {
transform: translateY(-3px);
box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}
#log-container {
margin-top: 30px;
}
#log-container h2 {
font-size: 22px;
margin-bottom: 15px;
}
.log-item {
padding: 10px 15px;
margin-bottom: 10px;
background-color: #f9f9f9;
border-left: 4px solid #4a90e2;
border-radius: 5px;
font-size: 14px;
color: #555;
}
</style>
</head>
<body>
<header>Selector</header>
<main>
<h1>Select a Color</h1>
<div class="buttons-container">
{% for color in colors %}
<button
class="color-button"
style="background-color: {{ color }};"
onclick="sendColor('{{ color }}')">
{{ color }}
</button>
{% endfor %}
</div>
<div id="log-container">
<h2>Logs</h2>
<div id="logs">
<!-- Logs will be dynamically updated -->
</div>
</div>
</main>
<script>
// Function to send color to the server
async function sendColor(color) {
try {
const response = await fetch('/publish', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({ color: color }),
});
const result = await response.json();
if (result.status === "success") {
alert(`Color "${result.color}" sent successfully!`);
} else {
alert("Error sending color.");
}
} catch (error) {
console.error("Error:", error);
}
}
// Function to fetch logs
async function fetchLogs() {
try {
const response = await fetch('/logs');
const logs = await response.json();
const logsContainer = document.getElementById("logs");
logsContainer.innerHTML = logs.map(log => `<div class="log-item">${log}</div>`).join("");
} catch (error) {
console.error("Error fetching logs:", error);
}
}
// Fetch logs every 2 seconds
setInterval(fetchLogs, 2000);
</script>
</body>
</html>
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