Initial POC
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#!/usr/bin/env python
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from flask import Flask, flash, redirect, render_template_string
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from flask import render_template, request, session, abort
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import os
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app = Flask(__name__)
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def button_widget(topic, label, pub_value):
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def f():
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template = '''
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<div>
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<input type="button" value="{{label}}" onclick="publish('{{topic}}', '{{pub_value}}');"/>
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</div>
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'''
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return render_template_string(
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template, topic=topic, label=label, pub_value=pub_value)
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return f
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def label_widget(topic, label, unit=''):
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def f():
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template = '''
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<div class="widget subscriber" data-topic="{{topic}}">
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<div>
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<span class="{{topic}}-value update-policy-replace-content">-</span><span>{{unit}}</span>
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</div>
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<div>{{label}}</div>
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</div>
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'''
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return render_template_string(
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template, topic=topic, label=label, unit=unit)
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return f
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def log_widget(topic, label):
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def f():
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template = '''
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<div class="widget subscriber" data-topic="{{topic}}">
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<div class="{{topic}}-value update-policy-append-content" style="overflow: auto; height:100px;">
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</div>
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<div>{{label}}</div>
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</div>
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'''
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return render_template_string(template, topic=topic, label=label)
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return f
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def row_layout(title, *elems):
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def f():
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template = '''
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<div>
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<div>{{title}}</div>
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<div style="display: flex;">
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{% for w in elems %}
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{{w()|safe}}
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{% endfor %}
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</div>
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</div>
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'''
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return render_template_string(template, title=title, elems=elems)
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return f
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@app.route('/')
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def home():
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return render_template(
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'base.html',
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widgets=[
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label_widget("test", "test value", "%"),
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row_layout(
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"Temperature",
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label_widget("home/sensors/livingroom/temperature",
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"livingroom", "°C"),
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label_widget("home/sensors/office/temperature", "office",
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"°C"),
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label_widget("home/sensors/bedroom/temperature", "bedroom",
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"°C")),
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row_layout("Device logs", log_widget("test", "test log"),
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log_widget("test2", "test log 2")),
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button_widget("test", "set to 1", 1),
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button_widget("test", "set to foo", 'foo')
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])
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if __name__ == "__main__":
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app.secret_key = os.urandom(12)
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app.run(debug=True, host='0.0.0.0', port=4000)
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@ -0,0 +1,131 @@
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<!DOCTYPE html>
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<html>
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<head>
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<style type="text/css">
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.widget { width: 100%; padding: 5px; margin: 10px; background-color: white; }
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.widget-unset { color: gray; }
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#wrapper { width: 100%; height: 100%;}
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html, body { height: 100%;}
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.wrapper-ok { background-color: #e9ecef;}
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.wrapper-error { background-color: #ff8888;}
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</style>
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<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
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<script src="https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.2/mqttws31.min.js" type="text/javascript"></script>
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<script>
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// Called after form input is processed
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function startConnect() {
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// Generate a random client ID
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clientID = "clientID-" + parseInt(Math.random() * 100);
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document.getElementById("wrapper").classList.add("wrapper-error");
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document.getElementById("wrapper").classList.remove("wrapper-ok");
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// Fetch the hostname/IP address and port number from the form
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host = "bojack"
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port = 8080;
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// Print output for the user in the messages div
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document.getElementById("messages").innerHTML += '<span>Connecting to: ' + host + ' on port: ' + port + '</span><br/>';
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document.getElementById("messages").innerHTML += '<span>Using the following client value: ' + clientID + '</span><br/>';
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// Initialize new Paho client connection
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client = new Paho.MQTT.Client(host, Number(port), clientID);
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// Set callback handlers
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client.onConnectionLost = onConnectionLost;
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client.onMessageArrived = onMessageArrived;
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// Connect the client, if successful, call onConnect function
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client.connect({
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onSuccess: onConnect,
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});
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}
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// Called when the client connects
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function onConnect() {
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document.getElementById("wrapper").classList.remove("wrapper-error");
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document.getElementById("wrapper").classList.add("wrapper-ok");
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var subWidgets = document.getElementsByClassName("subscriber");
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console.log("Found " + subWidgets.length + " widgets");
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for (var i = 0; i < subWidgets.length; i++) {
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var c = subWidgets.item(i);
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var topic = c.getAttribute('data-topic');
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console.log("Subscribing to: " + topic);
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client.subscribe(topic);
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c.classList.add('widget-unset');
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}
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// Subscribe to the requested topic
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}
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// Called when the client loses its connection
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function onConnectionLost(responseObject) {
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console.log("onConnectionLost: Connection Lost");
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document.getElementById("wrapper").classList.remove("wrapper-ok");
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document.getElementById("wrapper").classList.add("wrapper-error");
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if (responseObject.errorCode !== 0) {
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console.log("onConnectionLost: " + responseObject.errorMessage);
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}
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}
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// Called when a message arrives
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function onMessageArrived(message) {
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console.log(message.destinationName + "-value");
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var views = document.getElementsByClassName(message.destinationName + "-value");
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for (var i = 0 ; i < views.length; i++) {
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view = views.item(i);
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console.log(view);
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if (view.classList.contains("update-policy-replace-content")) {
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view.innerHTML = message.payloadString;
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} else if(view.classList.contains("update-policy-append-content")) {
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view.innerHTML += message.payloadString + "<br/>";
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view.scrollTop = view.scrollHeight;
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}
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}
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var widgets = document.querySelectorAll("[data-topic='" + message.destinationName + "']");
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for (var i = 0 ; i < widgets.length; i++) {
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widgets.item(i).classList.remove("widget-unset");
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}
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}
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// Called when the disconnection button is pressed
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function startDisconnect() {
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client.disconnect();
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document.getElementById("messages").innerHTML += '<span>Disconnected</span><br/>';
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updateScroll(); // Scroll to bottom of window
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}
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// Updates #messages div to auto-scroll
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function updateScroll() {
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var element = document.getElementById("messages");
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element.scrollTop = element.scrollHeight;
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}
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function publish(topic, value) {
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var message = new Paho.MQTT.Message(value);
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message.destinationName = topic;
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client.send(message);
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}
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window.onload = startConnect;
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</script>
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<title>0xee home</title>
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</head>
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<body>
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<div id="wrapper">
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<br/>
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<div id="value">
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</div>
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<div id="widgets">
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{% for w in widgets %}
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{{w()|safe}}
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{% endfor %}
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</div>
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<br/>
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<div id="messages"></div>
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<input type="button" onclick="startConnect()" value="Connect">
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<input type="button" onclick="startDisconnect()" value="Disconnect">
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</div>
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</body>
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</html>
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