Add a "reset defaults" button and handler.

1 files changed, 31 insertions, 2 deletions

diff --git a/main/http_server.c b/main/http_server.c
index 745bfa6..16a7256 100644
--- a/main/http_server.c
+++ b/main/http_server.c
@@ -15,14 +15,16 @@
     ESP_LOGI(TAG, "Handling [%s] (%s)", #attr, req->uri);              \
     ws_params_t* params = (ws_params_t*)req->user_ctx;                 \
     httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");       \
+    ws_state_t snapshot;                                               \
     if (xSemaphoreTake(params->state_lock, portMAX_DELAY) != pdTRUE) { \
       httpd_resp_send_err(                                             \
           req, HTTPD_500_INTERNAL_SERVER_ERROR, "lock failed");        \
       return ESP_FAIL;                                                 \
     }                                                                  \
     http_handle(typ)(req, &params->state.attr);                        \
-    ws_state_save(&params->state);                                     \
+    snapshot = params->state;                                          \
     xSemaphoreGive(params->state_lock);                                \
+    ws_state_save(&snapshot);                                          \
     httpd_resp_send(req, NULL, 0);                                     \
     return ESP_OK;                                                     \
   }                                                                    \
@@ -92,17 +94,44 @@ static httpd_uri_t http_params_get_handler = {
     .handler = handle_get_params,
     .user_ctx = NULL};
 
+static esp_err_t handle_reset(httpd_req_t* req)
+{
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  ws_params_t* params = (ws_params_t*)req->user_ctx;
+  ws_state_t snapshot;
+  reset_parameters(params);
+  if (xSemaphoreTake(params->state_lock, portMAX_DELAY) != pdTRUE) {
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "lock failed");
+    return ESP_FAIL;
+  }
+  snapshot = params->state;
+  xSemaphoreGive(params->state_lock);
+
+  ws_state_save(&snapshot);
+  httpd_resp_send(req, NULL, 0);
+  return ESP_OK;
+}
+
+static httpd_uri_t http_reset_handler = {
+    .uri = "/reset",
+    .method = HTTP_POST,
+    .handler = handle_reset,
+    .user_ctx = NULL};
+
 httpd_handle_t start_webserver(ws_params_t* params)
 {
   httpd_handle_t server = NULL;
   httpd_config_t config = HTTPD_DEFAULT_CONFIG();
   config.lru_purge_enable = true;
-  config.max_uri_handlers = NUMBER_PARAMS + 1;
+  config.max_uri_handlers = NUMBER_PARAMS + 2;
 
   ESP_LOGI(TAG, "Starting httpd server on port: '%d'", config.server_port);
   if (httpd_start(&server, &config) == ESP_OK) {
     http_params_get_handler.user_ctx = params;
+    http_reset_handler.user_ctx = params;
     httpd_register_uri_handler(server, &http_params_get_handler);
+    httpd_register_uri_handler(server, &http_reset_handler);
 
 #define STATE_PARAM(typ, attr, ...)                     \
   ESP_LOGI(TAG, "Registering URI handler [%s]", #attr); \