basic of display management. Backend to register and give image for the device. front end to manage displays etc.

Provider/main/api/devices/list.cpp

@@ -0,0 +1,40 @@
+// GET /api/devices — List all registered devices
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "types.hpp"
+#include "device.hpp"
+
+internal esp_err_t api_devices_get_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  cJSON *arr = cJSON_CreateArray();
+
+  for (int i = 0; i < MAX_DEVICES; i++)
+  {
+    if (g_Devices[i].active)
+    {
+      cJSON *obj = cJSON_CreateObject();
+      cJSON_AddStringToObject(obj, "mac", g_Devices[i].mac);
+      cJSON_AddBoolToObject(obj, "has_layout", g_Devices[i].xml_layout[0] != '\0');
+      cJSON_AddItemToArray(arr, obj);
+    }
+  }
+
+  const char *json = cJSON_PrintUnformatted(arr);
+  httpd_resp_sendstr(req, json);
+
+  free((void *)json);
+  cJSON_Delete(arr);
+
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_devices_get_uri = {
+    .uri = "/api/devices",
+    .method = HTTP_GET,
+    .handler = api_devices_get_handler,
+    .user_ctx = NULL};