backend rework- full test 1

.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+    "spellright.language": [
+        "de",
+        "en"
+    ],
+    "spellright.documentTypes": [
+        "markdown",
+        "latex",
+        "plaintext"
+    ]
+}

db/README.md

@@ -0,0 +1,20 @@
+# COMMANDS DB description
+
+## one command contains:
+-   command
+-   status
+-   command_id
+-   tstamp
+
+### command may contain one out of following strings:
+```["toggle_machine","","","","","",""]```
+
+### status may contain one out of following strings:
+```["pending","failed","served","rejected"]```
+
+### command_id is a random generated 4 chars long integer to identify the exact command between Server frontend Database and ESP
+
+### tstamp is the exact Date at the first ever creation of the db entry and does not say anything about completion or rejection.
+
+## NOTE:
+### A created command is marked as failed after 5 minutes if its status is still pending, to ensure that no processes continue after a communication failure in the chain.

db/init_scripts/initCom.py

@@ -1,3 +1,6 @@
+# -*- coding: utf-8 -*-
+# Dieses Skript erstellt eine SQLite-Datenbank mit einer Tabelle für Befehle.
+
 import os
 import sqlite3
 

init.py

@@ -0,0 +1,29 @@
+from modules.persistence import save_dict
+from datetime import datetime, UTC
+
+# Defaults
+water = {
+    "lastFilled": str(datetime.now(UTC)),
+    "fill": 100,
+    "coffeesOnFill": 0
+}
+
+beans = {
+    "lastFilled": str(datetime.now(UTC)),
+    "fill": 100,
+    "coffeesOnFill": 0
+}
+
+machine = {
+    "state": "idle",
+    "connected": False,
+    "ready": False,
+    "peding_command": False,
+    "error": False,
+    "lastConnectionProof": str(datetime.now(UTC))
+}
+
+# In JSON-Dateien speichern
+save_dict("water", water)
+save_dict("beans", beans)
+save_dict("machine", machine)

modules/persistence.py

@@ -0,0 +1,23 @@
+import os
+import json
+from datetime import datetime
+
+BASE_PATH = os.path.join(os.path.dirname(__file__), "..", "persistence")
+BASE_PATH = os.path.abspath(BASE_PATH)
+
+
+def save_dict(name, data):
+    path = os.path.join(BASE_PATH, f"{name}.json")
+    os.makedirs(BASE_PATH, exist_ok=True)
+    with open(path, "w") as f:
+        json.dump(data, f, default=str, indent=2)
+
+def load_dict(name):
+    path = os.path.join(BASE_PATH, f"{name}.json")
+    if os.path.exists(path):
+        with open(path, "r") as f:
+            return json.load(f)
+    return {}  # fallback falls Datei fehlt
+
+# no persistence but global variable important for tracking the esp-connection over runtime
+esp_conn_infos = {"ip_global": None, "ip_local": None, "last_seen": None, "connection_valid": False}

modules/socketio.py

@@ -0,0 +1,16 @@
+# extensions.py
+from flask_socketio import SocketIO
+from modules.persistence import esp_conn_infos,load_dict, save_dict
+
+socketio = SocketIO(cors_allowed_origins="*", async_mode='threading')
+
+def resend_static_data():
+    water = load_dict("water")
+    beans = load_dict("beans")
+    machine = load_dict("machine")
+    socketio.emit('static_data', {
+        'water': water,
+        'beans': beans,
+        'machine': machine,
+        'esp_conn_infos': esp_conn_infos
+})

persistence/beans.json

@@ -0,0 +1,6 @@
+{
+  "lastFilled": "2025-05-06 20:56:49.436340+00:00",
+  "fill": 100,
+  "coffeesOnFill": 0,
+  "refilled": 0
+}

persistence/machine.json

@@ -0,0 +1,8 @@
+{
+  "state": "idle",
+  "connected": false,
+  "ready": false,
+  "peding_command": false,
+  "error": false,
+  "lastConnectionProof": "2025-05-06 20:56:49.436343+00:00"
+}

persistence/water.json

@@ -0,0 +1,6 @@
+{
+  "lastFilled": "2025-05-06 20:56:49.436328+00:00",
+  "fill": 21,
+  "coffeesOnFill": 0,
+  "refilled": 0
+}

routes/esp_routes.py

@@ -1,11 +1,13 @@
 from flask import Blueprint, render_template, request, jsonify
-import routes.shared as shared
 from flask import Flask, jsonify, request
 import paho.mqtt.client as mqtt
 import json
 import random
 import sqlite3
 import os
+from modules.persistence import esp_conn_infos
+import datetime
+from modules.socketio import resend_static_data
 
 esp = Blueprint('eps', __name__, url_prefix='/unsecure/esp')
 
@@ -15,11 +17,6 @@ MQTT_BROKER = "localhost"  # oder IP/Domain
 MQTT_PORT = 1883
 MQTT_TOPIC = "coffee/command"
 
-@esp.route('/')
-def fetch_command():
-    pCd = shared.pending_command
-    shared.reset_command()
-    return jsonify(pCd)
 
 @esp.route('/online', methods=['POST'])
 def esp_online():
@@ -27,6 +24,12 @@ def esp_online():
     sender_ip = request.headers.get('X-Forwarded-For', request.remote_addr)
     esp_ip = data.get("ip", "unknown")
 
+    esp_conn_infos["ip_local"] = esp_ip
+    esp_conn_infos["ip_global"] = sender_ip
+    esp_conn_infos["last_seen"] = datetime.now()
+    esp_conn_infos["connection_valid"] = True
+    resend_static_data()
+    
     print(f"ESP ONLINE von IP: {esp_ip}, roher IP: {sender_ip}")
     return jsonify({"status": "ok"})
 

routes/shared.py

@@ -1,10 +0,0 @@
-pending_command = {'command': None, 'command-URL': None, 'command-expected': None, 'command-expected-URL': None}
-
-def reset_command():
-    global pending_command
-    pending_command = {
-        'command': None,
-        'command-URL': None,
-        'command-expected': None,
-        'command-expected-topic': None
-    }

routes/unsecure_routes.py

@@ -1,25 +1,30 @@
 from flask import Blueprint, render_template, request, jsonify
-import routes.shared as shared
 unsecure = Blueprint('unsecure', __name__, url_prefix='/unsecure')
+from modules.persistence import load_dict, save_dict
+from modules.persistence import esp_conn_infos
+# from flask_socketio import SocketIO
+from modules.socketio import resend_static_data
 
-
+# def resend_static_data():
+#     water = load_dict("water")
+#     beans = load_dict("beans")
+#     machine = load_dict("machine")
+#     socketio.emit('static_data', {
+#         'water': water,
+#         'beans': beans,
+#         'machine': machine,
+#         'esp_conn_infos': esp_conn_infos
+# })
 
 @unsecure.route('/')
 def index():
-    return render_template('index.html', title='gimmiCoffee')
+    water = load_dict("water")
+    beans = load_dict("beans")
+    machine = load_dict("machine")
+    print(f"Water: {water}, Beans: {beans}, Machine: {machine}")
+    return render_template('index.html', title='gimmiCoffee', water=water, beans=beans, machine=machine, esp_conn_infos=esp_conn_infos)
 
-@unsecure.route('/send')
+@unsecure.route('/update')
-def send_command():
+def update():
-    pCd = shared.pending_command
+    resend_static_data()
-    befehl = request.args.get('befehl')
+    return jsonify({"status": "ok"})
-    if befehl:
-        pCd['command'] = befehl
-        pCd['command-URL'] = '/unsecure/esp/someURI'
-        pCd.update({'extra': 'test'})
-        print(pCd)
-        return f"Befehl '{pCd}' gespeichert."
-    return "Kein Befehl angegeben.", 400
-
-# @unsecure.route('/live')
-# def test():
-#     return render_template('live.html', users=[{'name': 'Max'}, {'name': 'Moritz'}, {'name': 'Hans'}])

server.py

@@ -1,19 +1,26 @@
 from flask import Flask
-from flask_socketio import SocketIO
 from routes.unsecure_routes import unsecure
 from routes.esp_routes import esp
 import threading
 import time
+import os
 import paho.mqtt.client as mqtt
+from datetime import datetime, timedelta
+import sqlite3
+from modules.persistence import load_dict, save_dict, esp_conn_infos
+from modules.socketio import socketio, resend_static_data
 
 MQTT_BROKER = "localhost"
 MQTT_PORT = 1883
 MQTT_TOPIC_SUB = "coffee/status"
 MQTT_TOPIC_SEND = "coffee/command"
 
+
 app = Flask(__name__, static_url_path='/unsecure/static')
 app.config['SECRET_KEY'] = 'super-secret-key'
-socketio = SocketIO(app, cors_allowed_origins="*", async_mode='threading')
+
+socketio.init_app(app)
+
 
 # Blueprints registrieren
 app.register_blueprint(unsecure)
@@ -33,7 +40,7 @@ def on_message(client, userdata, msg):
         'message': msg.payload.decode()
     })
 
-# MQTT-Thread starten
+# MQTT-Thread
 def mqtt_thread():
     client = mqtt.Client()
     client.on_connect = on_connect
@@ -41,24 +48,69 @@ def mqtt_thread():
     client.connect(MQTT_BROKER, MQTT_PORT, 60)
     client.loop_forever()
 
-# Dummy-Daten-Thread
+# DB-Cleanup-Thread
-# def send_data():
+def cleanup_old_commands():
-#     counter = 0
-#     while True:
-#         data = {
-#             'test': 'Live-Daten',
-#             'status': 'OK',
-#             'counter': counter
-#         }
-#         socketio.emit('update_data', data)
-#         counter += 1
-#         time.sleep(2)
 
-# Beide Threads starten
+    db_path = os.path.join(os.path.dirname(__file__), "db", "commands.db")
-#threading.Thread(target=send_data, daemon=True).start()
 
+    while True:
+        try:
+            conn = sqlite3.connect(db_path)
+            cursor = conn.cursor()
+
+            five_minutes_ago = (datetime.utcnow() - timedelta(minutes=5)).strftime('%Y-%m-%d %H:%M:%S')
+
+            cursor.execute("""
+                UPDATE commands
+                SET status = 'failed'
+                WHERE status = 'pending' AND tstamp <= ?
+            """, (five_minutes_ago,))
+
+            updated_rows = cursor.rowcount
+            conn.commit()
+            conn.close()
+
+            if updated_rows > 0:
+                print(f"[Cleanup] {updated_rows} Einträge als 'failed' markiert.")
+        except Exception as e:
+            print(f"[Cleanup-Fehler] {e}")
+
+        time.sleep(60)  # jede Minute prüfen ob es pending Einträge gibt, die älter als 5 Minuten sind
+
+# Clear commands DB
+def clear_commands_db():
+    import os
+    import sqlite3
+
+    db_path = os.path.join(os.path.dirname(__file__), "db", "commands.db")
+
+    if os.path.exists(db_path):
+        conn = sqlite3.connect(db_path)
+        cursor = conn.cursor()
+        cursor.execute("DELETE FROM commands")
+        conn.commit()
+        conn.close()
+        print("[DB] commands-Tabelle geleert.")
+    else:
+        print("[DB] Keine Datenbank gefunden – nichts geleert.")
+
+# Motitior ESP-Connection
+def monitor_esp_connection():
+    while True:
+        if esp_conn_infos["last_seen"]:
+            time_diff = datetime.now() - esp_conn_infos["last_seen"]
+            if time_diff > timedelta(minutes=30):
+                esp_conn_infos["connection_valid"] = False
+                resend_static_data()
+        time.sleep(60)  # einmal pro Minute die Verbindung zum ESP prüfen
+
+### THREADS START ###
+threading.Thread(target=cleanup_old_commands, daemon=True).start()
+threading.Thread(target=monitor_esp_connection, daemon=True).start()
 
 #threading.Thread(target=mqtt_thread, daemon=True).start()
 
 if __name__ == '__main__':
+    #clear_commands_db()
     socketio.run(app, host='0.0.0.0', port=3060, allow_unsafe_werkzeug=True)
+

static/script.js

@@ -1 +1,55 @@
-//im empty
+function gebId(id) {
+    return document.getElementById(id);
+}
+
+
+const water = JSON.parse(document.getElementById("waterData").innerText)
+const beans = JSON.parse(document.getElementById("beansData").innerText)
+const machine = JSON.parse(document.getElementById("machineData").innerText)
+const esp_conn_infos = JSON.parse(document.getElementById("espData").innerText)
+
+// console.log(water)
+// console.log(beans)
+// console.log(machine)
+// console.log(esp_conn_infos)
+
+gebId("beans-fill").innerText = beans.fill + "%"
+gebId("water-fill").innerText = water.fill + "%"
+gebId("beans-filled").innerText = beans.refilled
+gebId("water-filled").innerText = water.refilled
+gebId("ip_global").innerText = esp_conn_infos.ip_global
+gebId("ip_local").innerText = esp_conn_infos.ip_local
+gebId("valid_connection").innerText = esp_conn_infos.connection_valid
+gebId("last_seen").innerText = esp_conn_infos.last_seen
+
+if (esp_conn_infos.connection_valid) {
+    gebId("validButt").classList.add("deniePress");
+    gebId("machine-status-butt").classList.remove("deniePress");
+}else {
+    gebId("infoMain").classList.add("blink-orange");
+}
+if (water.fill < 20) {
+    gebId("water-fill").parentElement.classList.add("blink-orange");
+}
+if (beans.fill < 20) {
+    gebId("beans-fill").parentElement.classList.add("blink-orange");
+}
+
+function toggleMachine() {
+    if (gebId("machine-status-butt").classList.contains("deniePress")){
+        return;
+    }
+    // console.log("toggleMachine");
+    const result = confirm("Möchtest du den Vorgang wirklich ausführen?");
+    if (!result) {
+        return;
+    }
+    console.log("toggleMachine");
+    document.getElementById("machine-status").innerText = "PENDING";
+    document.getElementById("machine-status-butt").classList.add("blink-orange");
+    fetch('/unsecure/esp/toggle-machine', { method: 'POST' })
+        .then(res => res.json())
+        .then(data => {
+            console.log(data);
+        });
+}

static/socketio.js

@@ -0,0 +1,31 @@
+function gebId(id) {
+    return document.getElementById(id);
+}
+
+const socket = io();
+    
+socket.on('static_data', (data) => {
+    gebId("beans-fill").innerText = data.beans.fill + "%"
+    gebId("water-fill").innerText = data.water.fill + "%"
+    gebId("beans-filled").innerText = data.beans.refilled
+    gebId("water-filled").innerText = data.water.refilled
+    if (data.water.fill < 20) {
+        gebId("water-fill").parentElement.classList.add("blink-orange");
+    }else {
+        gebId("water-fill").parentElement.classList.remove("blink-orange");
+    }
+    if (data.beans.fill < 20) {
+        gebId("beans-fill").parentElement.classList.add("blink-orange");
+    }else {
+        gebId("beans-fill").parentElement.classList.remove("blink-orange");
+    }
+    if (esp_conn_infos.connection_valid) {
+        gebId("validButt").classList.add("deniePress");
+        gebId("infoMain").classList.remove("blink-orange");
+        gebId("machine-status-butt").classList.remove("deniePress");
+    }else {
+        gebId("validButt").classList.remove("deniePress");
+        gebId("infoMain").classList.add("blink-orange");
+        gebId("machine-status-butt").classList.add("deniePress");
+    }
+});

static/style.css

@@ -115,16 +115,15 @@ header {
 .button-grid {
     display: flex;
     flex-wrap: wrap;
-    gap: 30px;
+    gap: 20px;
-    max-height: 70vh;
+    max-height: 73vh;
-    overflow-y: auto;
 }
 
 .grid-button {
     flex: 1 1 calc(50% - 15px);
-    background: #95a5a6;
+    background: #818e8f;
-    color: white;
+    /* color: white; */
-    height: 23vh;
+    height: 22vh;
     display: flex;
     align-items: center;
     justify-content: center;
@@ -139,7 +138,7 @@ header {
     border: 2px solid #000;
     padding: 20px;
     border-radius: 10px;
-    background: #f0f0f0;
+    background: #c4c4c4;
     overflow-y: auto;
 }
 
@@ -156,13 +155,13 @@ header {
     position: relative;
     width: 100%;
     border-radius: 10px;
-    background: #2ecc71;
+    background: #5f5f5f;
     font-family: Arial, sans-serif;
     margin-bottom: 16px;
     display: flex;
     align-items: center;
     justify-content: center;
-    color: rgb(0, 0, 0);
+    color: rgb(255, 255, 255);
     flex: none;
     height: 25vh;
     transition: background 0.3s;
@@ -170,21 +169,24 @@ header {
 
 
 .clickable:hover {
-    background: #27ae60;
+    background: #505050;
     cursor: pointer;
 }
+.not:hover {
+    background: #5f5f5f;
+}
 .clickable .top-left-text {
     position: absolute;
     top: 10px;
     left: 12px;
     font-size: 24px;
-    color: #000000;
+    color: #ffffff;
 }
 
 .clickable .center-number {
     font-size: 48px;
     font-weight: bold;
-    color: #222;
+    color: #ffffff;
 }
 .grid-button .top-left-text {
     position: absolute;
@@ -202,9 +204,11 @@ header {
     color: #222;
     text-align: center;
 }
-.deniePress:hover{
+.defaultGray:hover {
-    cursor: not-allowed;
+    background: #6a7274;
+    
 }
+
 .blink-orange {
   background-color: orange;
   animation: pulse-orange 1.0s infinite;
@@ -219,6 +223,34 @@ header {
 background-color: red;
 }
 .initBackRed:Hover{
-    background-color: rgb(255, 37, 37);
+    background-color: rgb(252, 47, 47);
 }
-  
+.deniePress:hover{
+    cursor: not-allowed;
+}
+.initBackRed:hover.deniePress {
+    background-color: red !important;
+    cursor: not-allowed;
+}
+.validationButtonOuter{
+    display: flex; 
+    align-items: center; 
+    justify-content: center;
+    flex: 1;
+}
+.validButt{
+    background-color: green;
+    padding: 10px;
+    border-radius: 5px;
+    transition: background 0.3s;
+}
+.validButt:hover{
+    cursor: pointer;
+    background-color: rgb(0, 151, 0);
+}
+.validButt:hover.deniePress{
+    background-color: green !important;
+}
+.deniePress:hover{
+    cursor: not-allowed;
+}

templates/index.html

@@ -7,6 +7,7 @@
     <title>{{ title }}</title>
     <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
     <link rel="icon" href="{{ url_for('static', filename='gimmiCoffee_Logo.png') }}" type="image/png">
+    <script src="https://cdn.socket.io/4.6.1/socket.io.min.js"></script>
 </head>
 <body>
     <header>
@@ -16,23 +17,43 @@
             <a href="/logout" class="logout">Logout</a>
         </div>
     </header>
-
+    <div id="waterData" style="display: none;">{{ water | tojson }}</div>
+    <div id="beansData" style="display: none;">{{ beans | tojson }}</div>
+    <div id="machineData" style="display: none;">{{ machine | tojson }}</div>
+    <div id="espData" style="display: none;">{{ esp_conn_infos | tojson }}</div>
     <main class="main-container">
 
         <section class="left">
-            <div class="info">ESP-Conn Infos</div>
+            <div class="info" id="infoMain">
-
+                <div style="flex: 1; display: flex; align-items: center;">
+                  <strong>ESP-Connection Infos</strong>
+                </div>
+              
+                <div style="flex: 1;">
+                  <p><strong>Global IP:</strong> <span id="ip_global">–</span></p>
+                  <p><strong>Local IP:</strong> <span id="ip_local">–</span></p>
+                </div>
+              
+                <div style="flex: 1;">
+                  <p><strong>Valid Connection:</strong> <span id="valid_connection">–</span></p>
+                  <p><strong>Last Seen:</strong> <span id="last_seen">–</span></p>
+                </div>
+              
+                <div class="validationButtonOuter">
+                  <div onclick="tryValidateConnection()" class="validButt" id="validButt">Validate Connection</div>
+                </div>
+              </div>
             <div class="button-grid">
                 <div class="grid-button deniePress">
                     <div class="top-left-text">Kaffeeee</div>
                     <div class="center-number">Kaffee Machen</div>
                 </div>
-                <div class="grid-button initBackRed" id="machine-status-butt" onclick="toggleMachine()">
+                <div class="grid-button initBackRed deniePress" id="machine-status-butt" onclick="toggleMachine()">
                     <div class="top-left-text">Maschine</div>
                     <div class="center-number" id="machine-status">AUS</div>
                 </div>
                 <div class="grid-button deniePress">
-                    <div class="top-left-text">Maschiene</div>
+                    <div class="top-left-text">Maschine</div>
                     <div class="center-number">Nicht Bereit</div>
                 </div>
 
@@ -40,13 +61,13 @@
                     <div class="top-left-text">Fehler</div>
                     <div class="center-number">Wasser leer?</div>
                 </div>
-                <div class="grid-button deniePress">
+                <div class="grid-button defaultGray">
                     <div class="top-left-text">Wasser</div>
-                    <div class="center-number">Aufgefüllt</div>
+                    <div class="center-number">Nachgefüllt?</div>
                 </div>
-                <div class="grid-button deniePress">
+                <div class="grid-button defaultGray">
                     <div class="top-left-text">Bohnen</div>
-                    <div class="center-number">Nachgefüllt</div>
+                    <div class="center-number">Nachgefüllt?</div>
                 </div>
             </div>
         </section>
@@ -59,34 +80,26 @@
             </div>
             <div class="clickable">
                 <div class="top-left-text">Bohnen Füllstand</div>
-                <div class="center-number">XX%</div>
+                <div class="center-number" id="beans-fill">XX%</div>
             </div>
             <div class="clickable">
                 <div class="top-left-text">Wasser Füllstand</div>
-                <div class="center-number">XX%</div>
+                <div class="center-number" id="water-fill">XX%</div>
             </div>
-            <div class="clickable">
+            <div class="clickable not">
                 <div class="top-left-text">Bohnen nachgefüllt</div>
-                <div class="center-number">XX</div>
+                <div class="center-number" id="beans-filled">XX</div>
             </div>
-            <div class="clickable">
+            <div class="clickable not">
                 <div class="top-left-text">Wasser nachgefüllt</div>
-                <div class="center-number">XX</div>
+                <div class="center-number" id="water-filled">XX</div>
             </div>
         </section>
         
     </main>
-    <script>
+
-        function toggleMachine() {
+    <script src="{{ url_for('static', filename='script.js') }}"></script>
-            document.getElementById("machine-status").innerText = "PENDING";
+    <script src="{{ url_for('static', filename='socketio.js') }}"></script>
-            document.getElementById("machine-status-butt").classList.add("blink-orange");
-            fetch('/unsecure/esp/toggle-machine', { method: 'POST' })
-                .then(res => res.json())
-                .then(data => {
-                    console.log(data);
-                });
-        }
-    </script>
 </body>
 </html>
 
@@ -94,4 +107,4 @@
 
 
 
-   <!--<script src="{{ url_for('static', filename='script.js') }}"></script>--> 
+

templates/live.html

@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<html lang="de">
-<head>
-    <meta charset="UTF-8">
-    <title>Live Update</title>
-    <script src="https://cdn.socket.io/4.6.1/socket.io.min.js"></script>
-</head>
-<body>
-    <h2>Daten vom Server</h2>
-    <p><strong>Test:</strong> <span id="test"></span></p>
-    <p><strong>Status:</strong> <span id="status"></span></p>
-    <p><strong>Counter:</strong> <span id="counter"></span></p>
-    <h1>Benutzer</h1>
-    <ul>
-        {% for user in users %}
-            <li>{{ user.name }}</li>
-        {% endfor %}
-    </ul>
-    <script>
-        const socket = io();
-    
-        socket.on('update_data', (data) => {
-            document.getElementById('test').textContent = data.test;
-            document.getElementById('status').textContent = data.status;
-            document.getElementById('counter').textContent = data.counter;
-        });
-    </script>
-    </body>
-    </html>
-    
-</body>
-</html>