Commit que implemeta api en flask

README.md

@@ -1,3 +1,30 @@
 # KPRSpaceAPI
 
-Implementation of the Space API used in KPR, based on a simple webcam running through Motion which detects whether the light is turned on and updates the status of the space accordingly.
+Implementation of the Space API used in KPR, based on a simple webcam running through Motion which detects whether the light is turned on and updates the status of the space accordingly.
+
+## Run (fish shell)
+
+Create and activate a virtual environment, install dependencies and run the server (example using fish):
+
+```fish
+python3 -m venv venv
+source venv/bin/activate.fish
+pip install -r requirements.txt
+
+# Configure environment (examples)
+set -x SNAPSHOT_INTERVAL 600           # seconds (600 = 10 minutes)
+set -x BRIGHTNESS_THRESHOLD 100        # 0-255
+set -x AUTO_START false                # true to auto-start on process launch
+
+# Run the app
+python app.py
+```
+
+Notes
+- Screenshots are saved to `./screenshots` by default. Override with `MOTION_DIR`.
+- To start/stop the monitor at runtime:
+  - Start: `curl -X POST http://localhost:5000/api/start`
+  - Stop:  `curl -X POST http://localhost:5000/api/stop`
+- The `SNAPSHOT_INTERVAL` env var is interpreted in seconds.
+- If you want the server to auto-start the monitor on launch, set `AUTO_START=true` before launching.
+- For production use, run under a WSGI server (gunicorn, systemd unit, docker, etc.).

api_client.py

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+#!/usr/bin/env python3
+"""Simple CLI to call the running Space API (no external deps).
+Usage:
+  python api_client.py status [--url URL]
+  python api_client.py start  [--url URL]
+  python api_client.py stop   [--url URL]
+  python api_client.py screenshot [--url URL] [--out FILE]
+
+Defaults URL: http://localhost:5000
+"""
+import sys
+import argparse
+import json
+from urllib import request, error, parse
+
+DEFAULT_URL = 'http://localhost:5000'
+
+
+def get(url):
+    try:
+        with request.urlopen(url, timeout=5) as resp:
+            return resp.read(), resp.getcode(), resp.info().get_content_type()
+    except error.HTTPError as e:
+        return e.read(), e.code, None
+    except Exception as e:
+        print('Request error:', e)
+        return None, None, None
+
+
+def post(url):
+    req = request.Request(url, method='POST')
+    try:
+        with request.urlopen(req, timeout=5) as resp:
+            return resp.read(), resp.getcode()
+    except error.HTTPError as e:
+        return e.read(), e.code
+    except Exception as e:
+        print('Request error:', e)
+        return None, None
+
+
+def cmd_status(base_url):
+    data, code, ctype = get(f"{base_url.rstrip('/')}/api/status")
+    if data is None:
+        print('No response')
+        return 2
+    try:
+        j = json.loads(data.decode())
+        print(json.dumps(j, indent=2))
+    except Exception:
+        print(data.decode(errors='ignore'))
+    return 0
+
+
+def cmd_start(base_url):
+    data, code = post(f"{base_url.rstrip('/')}/api/start")
+    print('HTTP', code)
+    if data:
+        print(data.decode(errors='ignore'))
+    return 0
+
+
+def cmd_stop(base_url):
+    data, code = post(f"{base_url.rstrip('/')}/api/stop")
+    print('HTTP', code)
+    if data:
+        print(data.decode(errors='ignore'))
+    return 0
+
+
+def cmd_screenshot(base_url, out):
+    data, code, ctype = get(f"{base_url.rstrip('/')}/api/screenshot")
+    if data is None or code != 200:
+        print('Failed to get screenshot, HTTP', code)
+        if data:
+            print(data.decode(errors='ignore'))
+        return 2
+    with open(out, 'wb') as f:
+        f.write(data)
+    print('Saved screenshot to', out)
+    return 0
+
+
+def main(argv):
+    p = argparse.ArgumentParser()
+    p.add_argument('--url', '-u', default=DEFAULT_URL, help='Base URL of the API')
+    sub = p.add_subparsers(dest='cmd')
+    sub.add_parser('status')
+    sub.add_parser('start')
+    sub.add_parser('stop')
+    ss = sub.add_parser('screenshot')
+    ss.add_argument('--out', '-o', default='latest.jpg')
+    args = p.parse_args(argv)
+    if not args.cmd:
+        p.print_help()
+        return 1
+    if args.cmd == 'status':
+        return cmd_status(args.url)
+    if args.cmd == 'start':
+        return cmd_start(args.url)
+    if args.cmd == 'stop':
+        return cmd_stop(args.url)
+    if args.cmd == 'screenshot':
+        return cmd_screenshot(args.url, args.out)
+    return 0
+
+
+if __name__ == '__main__':
+    raise SystemExit(main(sys.argv[1:]))

app.py

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+import os
+import threading
+import time
+from datetime import datetime, timezone
+import logging
+from flask import Flask, jsonify, send_file, render_template
+import cv2
+from spacer import get_latest_screenshot, process_image, get_brightness
+
+# Configuration
+BASE_DIR = os.path.dirname(__file__)
+SCREENSHOT_DIR = os.environ.get('MOTION_DIR', os.path.join(BASE_DIR, 'screenshots'))
+os.makedirs(SCREENSHOT_DIR, exist_ok=True)
+MIN_MOTION_CONTOUR_AREA = int(os.environ.get('MIN_MOTION_AREA', 4000))
+CAPTURE_DEVICE = int(os.environ.get('CAPTURE_DEVICE', 0))
+# default one snapshot every 10 minutes (600 seconds). Override with SNAPSHOT_INTERVAL env var.
+SNAPSHOT_INTERVAL_SECONDS = int(os.environ.get('SNAPSHOT_INTERVAL', 600))
+# Brightness threshold (0-255) used to decide open/closed state from a photo
+BRIGHTNESS_THRESHOLD = int(os.environ.get('BRIGHTNESS_THRESHOLD', 50))
+    
+app = Flask(__name__)
+# ensure logger prints info messages
+app.logger.setLevel(logging.INFO)
+
+state = {
+    'last_image': None,
+    'last_status': 'unknown',
+    'last_brightness': None,
+    'running': False,
+    'monitor_thread': None,
+}
+state_lock = threading.Lock()
+
+
+def save_frame(frame):
+    # use timezone-aware UTC datetime to avoid DeprecationWarning
+    ts = datetime.now(timezone.utc).strftime('%Y%m%dT%H%M%SZ')
+    filename = f'shot_{ts}.jpg'
+    path = os.path.join(SCREENSHOT_DIR, filename)
+    cv2.imwrite(path, frame)
+    app.logger.info('Saved snapshot: %s', path)
+    return path
+
+
+def motion_monitor():
+    cap = cv2.VideoCapture(CAPTURE_DEVICE)
+    if not cap.isOpened():
+        app.logger.error('Could not open video device %s', CAPTURE_DEVICE)
+        with state_lock:
+            state['running'] = False
+        return
+
+    app.logger.info('Periodic snapshot monitor started on device %s', CAPTURE_DEVICE)
+    last_snapshot = 0
+
+    try:
+        while True:
+            with state_lock:
+                if not state.get('running', False):
+                    break
+
+            ret, frame = cap.read()
+            if not ret:
+                time.sleep(0.1)
+                continue
+
+            current_time = time.time()
+            if current_time - last_snapshot >= SNAPSHOT_INTERVAL_SECONDS:
+                path = save_frame(frame)
+                brightness = get_brightness(path)
+                if brightness is not None:
+                    status = 'open' if brightness >= BRIGHTNESS_THRESHOLD else 'closed'
+                else:
+                    status = process_image(path)
+                with state_lock:
+                    state['last_image'] = path
+                    state['last_status'] = status
+                    state['last_brightness'] = brightness
+                app.logger.info(
+                    'Periodic snapshot: %s brightness=%.1f status=%s',
+                    path, brightness if brightness is not None else -1.0, status
+                )
+                last_snapshot = current_time
+
+            time.sleep(0.2)
+    finally:
+        cap.release()
+        app.logger.info('Periodic snapshot monitor stopped')
+        with state_lock:
+            state['running'] = False
+            state['monitor_thread'] = None
+
+
+@app.route('/')
+def index():
+    return render_template('index.html')
+
+
+@app.route('/api/status')
+def api_status():
+    with state_lock:
+        last_image = state['last_image'] or get_latest_screenshot(SCREENSHOT_DIR)
+        # prefer a recent brightness-derived status if available, otherwise fallback
+        last_status = state.get('last_status') if state.get('last_status') != 'unknown' else process_image(last_image)
+        last_brightness = state.get('last_brightness')
+    # if we don't have brightness yet attempt to compute it for the latest image
+    if last_brightness is None and last_image:
+        last_brightness = get_brightness(last_image)
+        if last_brightness is not None:
+            last_status = 'open' if last_brightness >= BRIGHTNESS_THRESHOLD else 'closed'
+    image_url = '/api/screenshot' if last_image else None
+    return jsonify({
+        'status': last_status,
+        'brightness': last_brightness,
+        'image': image_url,
+        'screenshot_dir': SCREENSHOT_DIR,
+        'brightness_threshold': BRIGHTNESS_THRESHOLD
+    })
+
+
+@app.route('/api/screenshot')
+def api_screenshot():
+    path = get_latest_screenshot(SCREENSHOT_DIR)
+    if not path:
+        return jsonify({'error': 'no screenshot available'}), 404
+    return send_file(path, mimetype='image/jpeg')
+
+
+@app.route('/api/start', methods=['POST'])
+def api_start():
+    with state_lock:
+        # if a monitor thread exists and is alive, report running
+        thr = state.get('monitor_thread')
+        if thr is not None and thr.is_alive():
+            state['running'] = True
+            return jsonify({'running': True}), 200
+        # start a new monitor thread
+        state['running'] = True
+        t = threading.Thread(target=motion_monitor, daemon=True)
+        state['monitor_thread'] = t
+        t.start()
+        return jsonify({'running': True}), 200
+
+
+@app.route('/api/stop', methods=['POST'])
+def api_stop():
+    # request monitor to stop and join the thread briefly
+    thr = None
+    with state_lock:
+        state['running'] = False
+        thr = state.get('monitor_thread')
+    if thr is not None:
+        # give the thread a short time to exit
+        thr.join(timeout=3.0)
+        with state_lock:
+            if state.get('monitor_thread') is thr:
+                state['monitor_thread'] = None
+    return jsonify({'running': False}), 200
+
+
+if __name__ == '__main__':
+    # Console (no-web) mode: run monitor in foreground and print status
+    CONSOLE_MODE = os.environ.get('CONSOLE_MODE', 'false').lower() in ('1', 'true', 'yes')
+    if CONSOLE_MODE:
+        print('Starting in CONSOLE_MODE — monitor will run in foreground. Press Ctrl+C to stop.')
+        with state_lock:
+            state['running'] = True
+        try:
+            # run monitor in the main thread (blocking) so logs appear live in console
+            motion_monitor()
+        except KeyboardInterrupt:
+            print('Interrupted, stopping monitor...')
+            with state_lock:
+                state['running'] = False
+        finally:
+            print('Monitor stopped')
+    else:
+        # Start monitor only if AUTO_START is set (web mode)
+        AUTO_START = os.environ.get('AUTO_START', 'false').lower() in ('1', 'true', 'yes')
+        if AUTO_START:
+            with state_lock:
+                state['running'] = True
+                t = threading.Thread(target=motion_monitor, daemon=True)
+                state['monitor_thread'] = t
+                t.start()
+        # run the Flask webserver
+        app.run(host='0.0.0.0', port=5000)

logs/run_web.log

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+The hackspace is unknown.
+ * Serving Flask app 'app'
+ * Debug mode: off
+WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on all addresses (0.0.0.0)
+ * Running on http://127.0.0.1:5000
+ * Running on http://192.168.100.59:5000
+Press CTRL+C to quit
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+127.0.0.1 - - [19/Oct/2025 23:01:48] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:48] "GET /api/screenshot?_=1760936508795 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:54] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:54] "GET /api/screenshot?_=1760936514322 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:55] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:55] "GET /api/screenshot?_=1760936515341 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:57] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:01:57] "GET /api/screenshot?_=1760936517311 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:17] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:17] "GET /api/screenshot?_=1760936537962 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:24] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:24] "GET /api/screenshot?_=1760936544325 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:25] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:25] "GET /api/screenshot?_=1760936545368 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:29] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:29] "GET /api/screenshot?_=1760936549633 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:47] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:48] "GET /api/screenshot?_=1760936567968 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:54] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:54] "GET /api/screenshot?_=1760936574359 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:55] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:55] "GET /api/screenshot?_=1760936575398 HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:57] "GET /api/status HTTP/1.1" 200 -
+127.0.0.1 - - [19/Oct/2025 23:02:57] "GET /api/screenshot?_=1760936577339 HTTP/1.1" 200 -

logs/run_web.pid

@@ -0,0 +1 @@
+61233

requirements.txt

@@ -0,0 +1,3 @@
+Flask>=2.0
+Pillow
+opencv-python

run_web.fish

@@ -0,0 +1,44 @@
+#!/usr/bin/env fish
+# Run the app in web mode with recommended env vars (fish shell)
+# Usage: ./run_web.fish
+
+# create venv if missing
+if not test -d venv
+    python3 -m venv venv
+end
+
+# activate venv
+source venv/bin/activate.fish
+
+# ensure dependencies
+pip install -r requirements.txt
+
+# recommended env vars (adjust if needed)
+set -x SNAPSHOT_INTERVAL 600           # seconds (600 = 10 minutes)
+set -x BRIGHTNESS_THRESHOLD 50        # 0-255
+set -x AUTO_START false                # true to auto-start monitor inside web server
+# ensure CONSOLE_MODE is unset so the Flask server will run
+set -e CONSOLE_MODE
+
+# logging
+set -x LOG_DIR logs
+mkdir -p $LOG_DIR
+set -x LOG_FILE $LOG_DIR/run_web.log
+set -x PID_FILE $LOG_DIR/run_web.pid
+
+echo "Starting web app in background; logs: $LOG_FILE"
+# Use bash to ensure POSIX redirection works reliably
+bash -lc "python app.py > '$LOG_FILE' 2>&1 & echo \$! > '$PID_FILE'"
+
+# wait briefly for process to start
+sleep 1
+if test -f $PID_FILE
+    set PID (cat $PID_FILE)
+    echo "Started pid: $PID"
+else
+    echo "Failed to start process; see $LOG_FILE for details"
+end
+
+# tail the log so the user can see live output (Ctrl+C to stop tail but process keeps running)
+echo "Tailing log (press Ctrl+C to stop tail, process will continue running in background)."
+tail -n 200 -f $LOG_FILE

spacer.py

@@ -2,27 +2,52 @@ import os
 from PIL import Image
 import glob
 
-def get_latest_screenshot(directory):
+
-    """ Get the latest screenshot file from the given directory. """
+def get_latest_screenshot(directory, ext='jpg'):
-    list_of_files = glob.glob(os.path.join(directory, '*.jpg')) # You can change the file extension if needed
+    """Get the latest screenshot file from the given directory. Returns None if none found."""
+    if not os.path.isdir(directory):
+        return None
+    pattern = os.path.join(directory, f'*.{ext}')
+    list_of_files = glob.glob(pattern)
+    if not list_of_files:
+        return None
     latest_file = max(list_of_files, key=os.path.getctime)
     return latest_file
 
+
 def process_image(image_path):
-    """ Process the image to decide if it's dark or light. """
+    """Process the image to decide if it's dark or light. Returns 'open', 'closed' or 'unknown'."""
-    with Image.open(image_path) as img:
+    if not image_path or not os.path.isfile(image_path):
-        # Resize image to 2x2
+        return 'unknown'
-        img = img.resize((2, 2))
+    try:
+        with Image.open(image_path) as img:
+            img = img.convert('RGB')
+            # shrink to 2x2 to average quickly
+            img = img.resize((2, 2))
+            pixels = list(img.getdata())
+            # average each channel
+            avg = [sum(ch) / len(pixels) for ch in zip(*pixels)]
+            luminance = sum(avg) / 3.0
+            return 'closed' if luminance < 128 else 'open'
+    except Exception:
+        return 'unknown'
 
-        # Get average color of the pixels
-        average_color = sum(img.getdata(), (0, 0, 0))
-        average_color = [color / 4 for color in average_color]  # Since the image is 2x2
 
-        # Determine if the image is dark or light
+def get_brightness(image_path):
-        if sum(average_color) / 3 < 128:  # Average RGB values less than 128 is considered dark
+    """Return the average brightness (0-255) of the image, or None on error."""
-            return 'closed'
+    if not image_path or not os.path.isfile(image_path):
-        else:
+        return None
-            return 'open'
+    try:
+        with Image.open(image_path) as img:
+            img = img.convert('L')
+            # sample more pixels for a smoother average
+            img = img.resize((16, 16))
+            pixels = list(img.getdata())
+            if not pixels:
+                return None
+            return sum(pixels) / len(pixels)
+    except Exception:
+        return None
 
 # Directory where the screenshots are stored
 screenshot_directory = '/var/lib/motion/'

static/style.css

@@ -0,0 +1,45 @@
+body {
+  font-family: Arial, sans-serif;
+  background: #f4f6f8;
+  color: #222;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100vh;
+  margin: 0;
+}
+.container {
+  background: white;
+  padding: 20px;
+  border-radius: 8px;
+  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
+  width: 420px;
+  text-align: center;
+}
+.status {
+  font-size: 1.6rem;
+  padding: 10px;
+  margin-bottom: 12px;
+  border-radius: 6px;
+  color: white;
+}
+.status.open { background: #28a745; }
+.status.closed { background: #dc3545; }
+.status.unknown { background: #6c757d; }
+img#latest {
+  max-width: 100%;
+  border-radius: 6px;
+  margin-bottom: 12px;
+  background: #111;
+  height: auto;
+}
+.controls button {
+  margin: 6px;
+  padding: 8px 14px;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+}
+.controls button#start { background: #007bff; color: white; }
+.controls button#stop { background: #ffc107; color: #222; }
+pre#info { text-align: left; background: #f0f0f0; padding: 8px; border-radius: 6px; font-size: 12px; }

templates/index.html

@@ -0,0 +1,49 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8" />
+  <title>Hackspace Status</title>
+  <link rel="stylesheet" href="/static/style.css" />
+</head>
+<body>
+  <div class="container">
+    <h1>Hackspace Status</h1>
+    <div id="status" class="status unknown">Loading...</div>
+    <img id="latest" src="" alt="Latest screenshot" />
+    <div class="controls">
+      <button id="start">Start Monitor</button>
+      <button id="stop">Stop Monitor</button>
+    </div>
+    <pre id="info"></pre>
+  </div>
+
+  <script>
+    async function refresh() {
+      try {
+        const r = await fetch('/api/status');
+        const j = await r.json();
+        const s = document.getElementById('status');
+        s.textContent = (j.status || 'unknown').toUpperCase();
+        s.className = 'status ' + (j.status || 'unknown');
+        const img = document.getElementById('latest');
+        if (j.image) {
+          img.src = j.image + '?_=' + Date.now();
+        } else {
+          img.src = '';
+        }
+        document.getElementById('info').textContent = JSON.stringify(j, null, 2);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+    document.getElementById('start').addEventListener('click', async () => {
+      await fetch('/api/start', {method: 'POST'});
+    });
+    document.getElementById('stop').addEventListener('click', async () => {
+      await fetch('/api/stop', {method: 'POST'});
+    });
+    setInterval(refresh, 30000);
+    refresh();
+  </script>
+</body>
+</html>