ADD: basic backend-files

backend/myp_backend.py

@@ -0,0 +1,148 @@
+from flask import Flask, render_template, request, redirect, url_for, jsonify, session
+import sqlite3
+import bcrypt
+
+app = Flask(__name__)
+app.secret_key = 'supersecretkey'
+
+# Database setup
+def init_db():
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+    c.execute('''CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, username TEXT, password TEXT)''')
+    c.execute('''CREATE TABLE IF NOT EXISTS printers (id INTEGER PRIMARY KEY, name TEXT, status TEXT)''')
+    c.execute('''CREATE TABLE IF NOT EXISTS jobs (id INTEGER PRIMARY KEY, printer_id INTEGER, user TEXT, date TEXT, status TEXT)''')
+    conn.commit()
+    conn.close()
+
+init_db()
+
+# User registration (Admin setup)
+def add_admin():
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+    hashed_pw = bcrypt.hashpw('adminpassword'.encode('utf-8'), bcrypt.gensalt())
+    c.execute("INSERT INTO users (username, password) VALUES (?, ?)", ('admin', hashed_pw))
+    conn.commit()
+    conn.close()
+
+# Comment the next line after the first run
+# add_admin()
+
+# API Endpoints
+@app.route('/api/printers/status', methods=['GET'])
+def get_printer_status():
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+    c.execute("SELECT * FROM printers")
+    printers = c.fetchall()
+    conn.close()
+    return jsonify(printers)
+
+@app.route('/api/printers/job', methods=['POST'])
+def create_job():
+    if not session.get('logged_in'):
+        return jsonify({'error': 'Unauthorized'}), 403
+
+    data = request.json
+    user = session['username']
+    printer_id = data['printer_id']
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+
+    c.execute("SELECT status FROM printers WHERE id=?", (printer_id,))
+    status = c.fetchone()[0]
+
+    if status == 'frei':
+        c.execute("INSERT INTO jobs (printer_id, user, date, status) VALUES (?, ?, datetime('now'), 'in progress')", 
+                  (printer_id, user))
+        c.execute("UPDATE printers SET status='belegt' WHERE id=?", (printer_id,))
+        conn.commit()
+    elif status == 'belegt':
+        return jsonify({'error': 'Printer already in use'}), 409
+    else:
+        return jsonify({'error': 'Invalid printer status'}), 400
+
+    conn.close()
+    return jsonify({'message': 'Job created and printer turned on'}), 200
+
+@app.route('/api/printers/reserve', methods=['POST'])
+def reserve_printer():
+    if not session.get('logged_in'):
+        return jsonify({'error': 'Unauthorized'}), 403
+
+    data = request.json
+    printer_id = data['printer_id']
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+
+    c.execute("SELECT status FROM printers WHERE id=?", (printer_id,))
+    status = c.fetchone()[0]
+
+    if status == 'frei':
+        c.execute("UPDATE printers SET status='reserviert' WHERE id=?", (printer_id,))
+        conn.commit()
+        message = 'Printer reserved'
+    else:
+        message = 'Printer cannot be reserved'
+
+    conn.close()
+    return jsonify({'message': message}), 200
+
+@app.route('/api/printers/release', methods=['POST'])
+def release_printer():
+    if not session.get('logged_in'):
+        return jsonify({'error': 'Unauthorized'}), 403
+
+    data = request.json
+    printer_id = data['printer_id']
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+
+    c.execute("UPDATE printers SET status='frei' WHERE id=?", (printer_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'message': 'Printer released'}), 200
+
+# Authentication routes
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password'].encode('utf-8')
+
+        conn = sqlite3.connect('database.db')
+        c = conn.cursor()
+        c.execute("SELECT * FROM users WHERE username=?", (username,))
+        user = c.fetchone()
+        conn.close()
+
+        if user and bcrypt.checkpw(password, user[2].encode('utf-8')):
+            session['logged_in'] = True
+            session['username'] = username
+            return redirect(url_for('dashboard'))
+        else:
+            return render_template('login.html', error='Invalid Credentials')
+
+    return render_template('login.html')
+
+@app.route('/dashboard')
+def dashboard():
+    if not session.get('logged_in'):
+        return redirect(url_for('login'))
+
+    conn = sqlite3.connect('database.db')
+    c = conn.cursor()
+    c.execute("SELECT * FROM printers")
+    printers = c.fetchall()
+    conn.close()
+
+    return render_template('dashboard.html', printers=printers)
+
+@app.route('/logout')
+def logout():
+    session.clear()
+    return redirect(url_for('login'))
+
+if __name__ == '__main__':
+    app.run(debug=True)

backend/templates/base.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>3D Printer Management</title>
+    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/daisyui@1.14.0/dist/full.css" rel="stylesheet">
+</head>
+<body class="bg-black text-white">
+    <nav class="bg-gray-800 p-4">
+        <div class="container mx-auto">
+            <h1 class="text-xl">3D Printer Management Dashboard</h1>
+        </div>
+    </nav>
+    <div class="container mx-auto mt-5">
+        {% block content %}{% endblock %}
+    </div>
+</body>
+</html>

backend/templates/dashboard.html

@@ -0,0 +1,29 @@
+{% extends "base.html" %}
+
+{% block content %}
+<h2 class="text-2xl mb-4">Printer Status</h2>
+<div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+    {% for printer in printers %}
+    <div class="card bg-gray-900 shadow-xl">
+        <div class="card-body">
+            <h2 class="card-title">{{ printer[1] }}</h2>
+            <p>Status: {{ printer[2] }}</p>
+            {% if printer[2] == 'frei' %}
+            <form method="POST" action="/api/printers/job">
+                <input type="hidden" name="printer_id" value="{{ printer[0] }}">
+                <button class="btn btn-success mt-4 w-full">Start Job</button>
+            </form>
+            {% elif printer[2] == 'belegt' %}
+            <button class="btn btn-warning mt-4 w-full" disabled>In Use</button>
+            {% elif printer[2] == 'reserviert' %}
+            <form method="POST" action="/api/printers/release">
+                <input type="hidden" name="printer_id" value="{{ printer[0] }}">
+                <button class="btn btn-info mt-4 w-full">Release</button>
+            </form>
+            {% endif %}
+        </div>
+    </div>
+    {% endfor %}
+</div>
+<a href="/logout" class="btn btn-secondary mt-4">Logout</a>
+{% endblock %}

backend/templates/login.html

@@ -0,0 +1,33 @@
+{% extends "base.html" %}
+
+{% block content %}
+<div class="flex justify-center items-center h-screen">
+    <div class="card w-96 bg-gray-900 shadow-xl">
+        <div class="card-body">
+            <h2 class="card-title">Login</h2>
+            <form method="POST">
+                <div class="form-control">
+                    <label class="label">
+                        <span class="label-text">Username</span>
+                    </label>
+                    <input type="text" name="username" class="input input-bordered w-full" required>
+                </div>
+                <div class="form-control">
+                    <label class="label">
+                        <span class="label-text">Password</span>
+                    </label>
+                    <input type="password" name="password" class="input input-bordered w-full" required>
+                </div>
+                <div class="form-control mt-6">
+                    <button class="btn btn-primary w-full">Login</button>
+                </div>
+            </form>
+            {% if error %}
+            <div class="mt-4 text-red-500">
+                {{ error }}
+            </div>
+            {% endif %}
+        </div>
+    </div>
+</div>
+{% endblock %}

docs/Aktueller Stand.md

@@ -38,8 +38,9 @@ use mix of shadcn ui and tremor.so blocks
 
 Bestellliste:
 - 1x Switch
+- 1x wlan access point
 - 2x Raspberry Pi (4B / 5)
-- Xx LAN-Kabel
+(- Xx LAN-Kabel)
 - Adapter für 3D-Drucker oder Schaltbare Steckdosen
 
 -> Datensicherung?!?!?!