feat: implement system time synchronization, web server handlers, and clock application components

components/web_server/web_server.c

@@ -1,11 +1,42 @@
-#include "web_server.h"
+#include "web_server.h"
 #include "web_server_pages.h"
+#include "sys_time.h"
 #include "esp_http_server.h"
 #include "esp_log.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
 
 static const char *TAG = "SYS_WEB";
 static httpd_handle_t s_server;
 
+static esp_err_t time_sync_handler(httpd_req_t *req)
+{
+    char query[128] = {0};
+    if (httpd_req_get_url_query_str(req, query, sizeof(query)) == ESP_OK) {
+        char val[32] = {0};
+        if (httpd_query_key_value(query, "epoch", val, sizeof(val)) == ESP_OK) {
+            time_t epoch = (time_t)strtoull(val, NULL, 10);
+            if (epoch >= 1704067200ULL) {
+                sys_time_set_epoch(epoch);
+            }
+        }
+    }
+
+    struct tm tm_info;
+    bool synced = sys_time_get_local(&tm_info);
+    time_t now = sys_time_get_epoch();
+    char strftime_buf[64];
+    strftime(strftime_buf, sizeof(strftime_buf), "%Y-%m-%d %H:%M:%S", &tm_info);
+
+    char resp[160];
+    snprintf(resp, sizeof(resp), "{\"synced\":%s,\"epoch\":%lld,\"time\":\"%s\",\"tz\":\"%s\"}",
+             synced ? "true" : "false", (long long)now, strftime_buf, sys_time_get_timezone());
+
+    httpd_resp_set_type(req, "application/json");
+    return httpd_resp_sendstr(req, resp);
+}
+
 esp_err_t web_server_start(void)
 {
     if (s_server) return ESP_OK;
@@ -19,6 +50,14 @@ esp_err_t web_server_start(void)
     web_server_register_wifi_pages(s_server);
     web_server_register_ota_page(s_server);
     web_server_register_serial_pages(s_server);
-    ESP_LOGI(TAG, "Web server started");
+
+    const httpd_uri_t time_uri = {
+        .uri = "/time/sync",
+        .method = HTTP_GET,
+        .handler = time_sync_handler
+    };
+    httpd_register_uri_handler(s_server, &time_uri);
+
+    ESP_LOGI(TAG, "Web server started with real-time sync service");
     return ESP_OK;
 }