feat: Add api/v1/config to get, put config

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

software/src/main.py

@@ -65,7 +65,7 @@ def run():
 
     # Wifi with default config
     setup_wifi()
-    start_webserver()
+    start_webserver(config)
 
     # Setup MP3 player
     with SDContext(mosi=hwconfig.SD_DI, miso=hwconfig.SD_DO, sck=hwconfig.SD_SCK, ss=hwconfig.SD_CS,

software/src/utils/config.py

@@ -5,7 +5,7 @@ from errno import ENOENT
 import json
 import os
 try:
-    from typing import TYPE_CHECKING, Mapping
+    from typing import TYPE_CHECKING, Mapping, Any
 except ImportError:
     TYPE_CHECKING = False
 
@@ -71,3 +71,21 @@ class Configuration:
 
     def get_button_map(self) -> Mapping[str, int | None]:
         return self._get('BUTTON_MAP')
+
+    # For the web API
+    def get_config(self) -> Mapping[str, Any]:
+        return self.config
+
+    def _validate(self, default, config, path=''):
+        for k in config.keys():
+            if k not in default:
+                raise ValueError(f'Invalid config key {path}/{k}')
+            if isinstance(default[k], dict):
+                if not isinstance(config[k], dict):
+                    raise ValueError(f'Invalid config: Value of {path}/{k} must be mapping')
+                self._validate(default[k], config[k], f'{path}/{k}')
+
+    def set_config(self, config):
+        self._validate(self.DEFAULT_CONFIG, config)
+        self.config = config
+        self._save()

software/src/webserver.py

@@ -9,11 +9,13 @@ from microdot import Microdot
 
 webapp = Microdot()
 server = None
+config = None
 
 
-def start_webserver():
-    global server
+def start_webserver(config_):
+    global server, config
     server = asyncio.create_task(webapp.start_server(port=80))
+    config = config_
 
 
 @webapp.route('/')
@@ -39,3 +41,17 @@ async def filesystem_post(request):
 async def playlist_post(request):
     print(request)
     return {'success': False}
+
+
+@webapp.route('/api/v1/config', methods=['GET'])
+async def config_get(request):
+    return config.get_config()
+
+
+@webapp.route('/api/v1/config', methods=['PUT'])
+async def config_put(request):
+    try:
+        config.set_config(request.json)
+    except ValueError as ex:
+        return str(ex), 400
+    return '', 204