Working

src/nenuscanner/__init__.py

@@ -2,6 +2,8 @@ from flask import Flask, send_from_directory, session
 import os
 from . import db, config, routes, utils, leds
 
+leds.get().enter()
+
 app = Flask(__name__)
 
 # Manage secret key

src/nenuscanner/camera.py

@@ -6,6 +6,8 @@ import shutil
 from . import leds, config
 import subprocess
 import json
+from PIL import Image
+import io
 
 
 def parse_config(lines):
@@ -62,14 +64,18 @@ class Camera:
 
 class RealCamera(Camera):
     def __init__(self):
+        self._entered = False
         self.inner = gp.Camera()
 
     def __enter__(self):
-        self.inner.init()
+        if not self._entered:
+            self._entered = True
+            self.inner.init()
         return self
 
     def __exit__(self, *args):
-        self.inner.exit()
+        # self.inner.exit()
+        pass
 
     def capture(self):
         try:
@@ -79,14 +85,11 @@ class RealCamera(Camera):
             return None
         
     def capture_preview(self):
-        try:
+        capture = gp.check_result(gp.gp_camera_capture_preview(self.inner))
-            subprocess.run(
+        file_data = gp.check_result(gp.gp_file_get_data_and_size(capture))
-            "gphoto2 --capture-preview --stdout > src/nenuscanner/static/feed.jpg",
+        data = memoryview(file_data)
-            shell=True, check=True
+        image = Image.open(io.BytesIO(file_data))
-        )
+        image.save("src/nenuscanner/static/feed.jpg")
-        except subprocess.CalledProcessError as e:
-            print('An error occured when capturing photo', e)
-            raise CameraException(f"Erreur lors de la capture de l'image: {e}")
 
     def save(self, capture, output_file):
         preview = self.inner.file_get(capture.folder, capture.name[:-3] + 'JPG', gp.GP_FILE_TYPE_NORMAL)
@@ -97,8 +100,17 @@ class RealCamera(Camera):
         raw.save(output_file + '.cr2')
 
     def config(self):
+
+        was_entered = self._entered
+        if self._entered:
+            self._entered = False
+            self.inner.exit()
+
         res = subprocess.run(["gphoto2", "--list-all-config"], capture_output=True,  encoding="utf-8")
 
+        if was_entered:
+            self.__enter__()
+
         # print(res.stdout[:200])
 
         configs = res.stdout.split("\n")
@@ -162,4 +174,4 @@ def set_config(parameter, value):
 class CameraException(Exception):
     """Exception personnalisée pour les erreurs liées à la caméra."""
     def __init__(self, message):
-        super().__init__(message)
+        super().__init__(message)

src/nenuscanner/leds.py

@@ -46,19 +46,25 @@ class GpioLed:
 
 class GpioLeds(Leds):
     def __init__(self, chip: str, gpio_pins: list[int]):
+        self._entered = False
         self.chip = gpiod.Chip(chip)
         self.leds = []
+
         for pin in gpio_pins:
             self.leds.append(GpioLed(pin))
 
     def __enter__(self):
-        for led in self.leds:
+        if not self._entered:
-            led.enter(self.chip)
+            self._entered = True
+            for led in self.leds:
+                led.enter(self.chip)
         return self
 
     def __exit__(self, *args):
-        for led in self.leds:
+        # for led in self.leds:
-            led.exit()
+        #     led.exit()
+        # self._entered = False
+        pass
 
     def off(self):
         for led in self.leds:

src/nenuscanner/routes/__init__.py

@@ -1,3 +1,4 @@
+import subprocess
 from flask import Blueprint, render_template
 
 from .. import db
@@ -16,6 +17,21 @@ def index():
     projects = db.Object.all_by_project(conn)
     return render_template('index.html', projects=projects)
 
+# Route that restarts the server
+@blueprint.route("/restart")
+def restart():
+    """
+    Serves the index of nenuscanner.
+    """
+    subprocess.Popen(
+        ["bash", "-c", "sleep 1 && systemctl restart nenuscanner --user"],
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+        start_new_session=True
+    )
+    return render_template('restart.html')
+
+
 
 blueprint.register_blueprint(object.blueprint, url_prefix='/object')
 blueprint.register_blueprint(calibration.blueprint, url_prefix='/calibration')

src/nenuscanner/routes/camera.py

@@ -44,13 +44,11 @@ def set_camera_settings():
     
     return {'status': 'ok', **updated}
 
-@blueprint.route('/feed.jpg')
+@blueprint.route('/feed.jpg', methods=['GET'])
 def camera_feed():
+    capture_preview()
     return send_file('static/feed.jpg', mimetype='image/jpeg')
 
-
-
-
 @blueprint.route('/config', methods=['GET'])
 def get_camera_config():
     """
@@ -96,14 +94,14 @@ def get_camera_config():
 
     return jsonify(grouped_params)
 
-@blueprint.route('/capture_preview', methods=['POST'])
+# @blueprint.route('/capture_preview', methods=['POST'])
 def capture_preview():
     """
     Capture un aperçu avec gphoto2 et sauvegarde dans static/feed.jpg
     """
     try:
-        cam = C.get()
+        with C.get() as cam:
-        cam.capture_preview()
+            cam.capture_preview()
-        return jsonify({'status': 'ok'})
+            return jsonify({'status': 'ok'})
     except C.CameraException as e:
-        return jsonify({'status': 'error', 'error': str(e)}), 500
+        return jsonify({'status': 'error', 'error': str(e)}), 500

src/nenuscanner/routes/leds.py

@@ -9,36 +9,6 @@ from .. import leds,config
 
 blueprint = Blueprint('leds', __name__)
 
-def _get_gpio_leds():
-    """Return a singleton leds controller stored in app.extensions."""
-    app = current_app._get_current_object()
-    ext_key = 'nenuscanner_gpio_leds'
-    if ext_key not in app.extensions:
-        # create and store the resource
-        app.extensions[ext_key] = leds.get().enter()
-    return app.extensions[ext_key]
-
-# WARNING : how to release
-
-#@blueprint.record_once
-#def _register_cleanup(state):
-#    """
-#Register a teardown handler on the app that will try to exit the leds controller
-#    when the app context is torn down.
-#    """
-#    app = state.app
-#    ext_key = 'nenuscanner_gpio_leds'
-#    @app.teardown_appcontext
-#    def _cleanup(exception=None):
-#        gpio = app.extensions.get(ext_key)
-#        if gpio:
-#            try:
-#                gpio.exit()
-#            except Exception:
-#                # best effort cleanup, don't raise during teardown
-#                pass
-
-
 # Routes for object management
 
 @blueprint.route('/')
@@ -61,10 +31,11 @@ def set_led():
     led = data.get('led')
     state = data.get('state')
     # get the controller (lazy, stored on app.extensions)
-    gpio_leds = _get_gpio_leds()
+    gpio_leds = leds.get()
 
     try:
         # parse led id/name according to your naming convention
+        print([x.gpio_pin for x in gpio_leds.leds])
         gpio_led = gpio_leds.get_by_uuid(int(led))
         print(f"Setting {led} / {gpio_led} to {state}")
         if state == "on":

src/nenuscanner/templates/base.html

@@ -23,7 +23,12 @@
                     </a>
                 </div>
                 <div id="navbarBasicExample" class="navbar-menu">
+		    <div class="navbar-start">
+			    <a class="navbar-item" href="/camera">Caméra</a>
+			    <a class="navbar-item" href="/leds">Leds</a>
+		    </div>
                     <div class="navbar-end">
+			    <a class="navbar-item" href="/restart">Redémarrer le serveur</a>
                         <a id="calibration-tag-0" class="calibration-tag navbar-item" href="/calibration/calibrate" {% if calibration.state != 0 %}style="display: none;"{% endif %}>
                             <span id="calibration-tag-0" class="tags has-addons">
                                 <span class="tag is-dark">étalonnage</span>

src/nenuscanner/templates/camera.html

@@ -11,7 +11,7 @@
                 </div>
                 <div class="column is-half has-text-centered">
                     <figure class="image is-4by3" style="max-width: 480px; margin: auto;">
-                        <img  class="preview" id="camera-preview" src="/static/feed.jpg?{{ range(1000000)|random }}" alt="Camera Preview"
+                        <img  class="preview" id="camera-preview" alt="Camera Preview"
                             style="border: 1px solid #ccc;">
                     </figure>
                     <button class="button is-small is-info mt-2" type="button" onclick="refreshPreview()">Rafraîchir
@@ -64,13 +64,16 @@
             body: JSON.stringify({ [paramName]: value })
         }).then(() => location.reload());
     }
+    
+    const img = document.getElementById('camera-preview');
+    img.onload = function() {
+        requestAnimationFrame(refreshPreview);
+    }
 
-    window.refreshPreview = function () {
+    function refreshPreview() {
-        const img = document.getElementById('camera-preview');
+        const url = '/camera/feed.jpg?' + new Date().getTime();
-        const url = '/static/feed.jpg?' + new Date().getTime();
         img.src = url;
     }
-    setInterval(window.refreshPreview, 1000); // Refresh every second
 
     document.addEventListener('DOMContentLoaded', function () {
         fetch('/camera/config')
@@ -146,7 +149,11 @@
                     });
                     container.appendChild(box);
                 });
-            });
+        
+		    // When ready, load preview
+		    refreshPreview();
+	    });
+
     });
     function CapturePreview() {
         fetch('/camera/capture_preview', {method: 'POST'})
@@ -160,4 +167,4 @@
             });
     }
 </script>
-{% endblock extrajs %}
+{% endblock extrajs %}