edit of all config data via website

Signed-off-by: Peter Siegmund <developer@mars3142.org>

firmware/components/simulator/include/storage.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "esp_err.h"
+
 #ifdef __cplusplus
 extern "C"
 {
@@ -8,6 +10,14 @@ extern "C"
     void load_file(const char *filename);
     char **read_lines_filtered(const char *filename, int *out_count);
     void free_lines(char **lines, int count);
+    /**
+     * Write an array of lines to a file (CSV or other text).
+     * @param filename File name (without /spiffs/)
+     * @param lines Array of lines (null-terminated strings)
+     * @param count Number of lines
+     * @return ESP_OK on success, error code otherwise
+     */
+    esp_err_t write_lines(const char *filename, char **lines, int count);
 #ifdef __cplusplus
 }
 #endif

firmware/components/simulator/src/storage.cpp

@@ -130,3 +130,27 @@ void free_lines(char **lines, int count)
         free(lines[i]);
     free(lines);
 }
+
+esp_err_t write_lines(const char *filename, char **lines, int count)
+{
+    char fullpath[128];
+    snprintf(fullpath, sizeof(fullpath), "/spiffs/%s", filename[0] == '/' ? filename + 1 : filename);
+    FILE *f = fopen(fullpath, "w");
+    if (!f)
+    {
+        ESP_LOGE(TAG, "Failed to open file for writing: %s", fullpath);
+        return ESP_FAIL;
+    }
+    for (int i = 0; i < count; ++i)
+    {
+        if (fprintf(f, "%s\n", lines[i]) < 0)
+        {
+            ESP_LOGE(TAG, "Failed to write line %d", i);
+            fclose(f);
+            return ESP_FAIL;
+        }
+    }
+    fclose(f);
+    ESP_LOGI(TAG, "Wrote %d lines to %s", count, fullpath);
+    return ESP_OK;
+}