feat: Implement web dashboard with system information, reboot, and OTA update functionality.

Provider/main/api/ota/firmware.cpp

@@ -0,0 +1,149 @@
+// SDK
+#include "cJSON.h"
+#include "esp_http_server.h"
+#include "esp_log.h"
+#include "esp_ota_ops.h"
+#include "esp_system.h"
+#include "esp_timer.h"
+#include <sys/param.h>
+
+// Project
+#include "appstate.hpp"
+#include "types.hpp"
+
+#define OTA_FIRMWARE_SCRATCH_BUFSIZE 4096
+
+internal void firmware_ota_restart_timer_callback(void *arg) { esp_restart(); }
+
+internal esp_err_t api_ota_firmware_handler(httpd_req_t *req)
+{
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  const esp_partition_t *update_partition =
+      esp_ota_get_next_update_partition(NULL);
+  if (update_partition == NULL)
+  {
+    ESP_LOGE("OTA_FW", "Passive OTA partition not found");
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                        "OTA partition not found");
+    return ESP_FAIL;
+  }
+
+  ESP_LOGI("OTA_FW", "Writing to partition subtype %d at offset 0x%lx",
+           update_partition->subtype, update_partition->address);
+
+  esp_ota_handle_t update_handle = 0;
+  esp_err_t err =
+      esp_ota_begin(update_partition, OTA_SIZE_UNKNOWN, &update_handle);
+  if (err != ESP_OK)
+  {
+    ESP_LOGE("OTA_FW", "esp_ota_begin failed (%s)", esp_err_to_name(err));
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                        "OTA begin failed");
+    return ESP_FAIL;
+  }
+
+  char *buf = (char *)malloc(OTA_FIRMWARE_SCRATCH_BUFSIZE);
+  if (!buf)
+  {
+    ESP_LOGE("OTA_FW", "Failed to allocate buffer");
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Out of memory");
+    return ESP_FAIL;
+  }
+
+  int binary_file_len = 0;
+  int remaining = req->content_len;
+
+  while (remaining > 0)
+  {
+    int recv_len =
+        httpd_req_recv(req, buf, MIN(remaining, OTA_FIRMWARE_SCRATCH_BUFSIZE));
+    if (recv_len <= 0)
+    {
+      if (recv_len == HTTPD_SOCK_ERR_TIMEOUT)
+      {
+        continue;
+      }
+      ESP_LOGE("OTA_FW", "Receive failed");
+      esp_ota_abort(update_handle);
+      free(buf);
+      httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                          "Receive failed");
+      return ESP_FAIL;
+    }
+
+    err = esp_ota_write(update_handle, (const void *)buf, recv_len);
+    if (err != ESP_OK)
+    {
+      ESP_LOGE("OTA_FW", "esp_ota_write failed (%s)", esp_err_to_name(err));
+      esp_ota_abort(update_handle);
+      free(buf);
+      httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                          "Flash write failed");
+      return ESP_FAIL;
+    }
+
+    binary_file_len += recv_len;
+    remaining -= recv_len;
+  }
+
+  free(buf);
+  ESP_LOGI("OTA_FW", "Total binary data written: %d", binary_file_len);
+
+  err = esp_ota_end(update_handle);
+  if (err != ESP_OK)
+  {
+    if (err == ESP_ERR_OTA_VALIDATE_FAILED)
+    {
+      ESP_LOGE("OTA_FW", "Image validation failed, image is corrupted");
+    }
+    else
+    {
+      ESP_LOGE("OTA_FW", "esp_ota_end failed (%s)!", esp_err_to_name(err));
+    }
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                        "OTA validation/end failed");
+    return ESP_FAIL;
+  }
+
+  err = esp_ota_set_boot_partition(update_partition);
+  if (err != ESP_OK)
+  {
+    ESP_LOGE("OTA_FW", "esp_ota_set_boot_partition failed (%s)!",
+             esp_err_to_name(err));
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                        "Failed to set boot partition");
+    return ESP_FAIL;
+  }
+
+  ESP_LOGI("OTA_FW", "OTA successful, rebooting...");
+
+  httpd_resp_set_type(req, "application/json");
+  cJSON *root = cJSON_CreateObject();
+  cJSON_AddStringToObject(root, "status", "success");
+  cJSON_AddStringToObject(root, "message",
+                          "Firmware update successful, rebooting...");
+  const char *response_text = cJSON_Print(root);
+  httpd_resp_sendstr(req, response_text);
+  free((void *)response_text);
+  cJSON_Delete(root);
+
+  // Trigger reboot with 1s delay
+  const esp_timer_create_args_t restart_timer_args = {
+      .callback = &firmware_ota_restart_timer_callback,
+      .arg = (void *)0,
+      .dispatch_method = ESP_TIMER_TASK,
+      .name = "fw_ota_restart_timer",
+      .skip_unhandled_events = false};
+  esp_timer_handle_t restart_timer;
+  esp_timer_create(&restart_timer_args, &restart_timer);
+  esp_timer_start_once(restart_timer, 1'000'000);
+
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_ota_firmware_uri = {.uri = "/api/ota/firmware",
+                                                   .method = HTTP_POST,
+                                                   .handler =
+                                                       api_ota_firmware_handler,
+                                                   .user_ctx = NULL};