Adds template libs

esp32/lib/ESP32-sveltekit/SettingValue.cpp

@@ -0,0 +1,67 @@
+/**
+ *   ESP32 SvelteKit
+ *
+ *   A simple, secure and extensible framework for IoT projects for ESP32 platforms
+ *   with responsive Sveltekit front-end built with TailwindCSS and DaisyUI.
+ *   https://github.com/theelims/ESP32-sveltekit
+ *
+ *   Copyright (C) 2018 - 2023 rjwats
+ *   Copyright (C) 2023 theelims
+ *
+ *   All Rights Reserved. This software may be modified and distributed under
+ *   the terms of the LGPL v3 license. See the LICENSE file for details.
+ **/
+
+#include <SettingValue.h>
+
+namespace SettingValue
+{
+    const String PLATFORM = "esp32";
+
+    /**
+     * Returns a new string after replacing each instance of the pattern with a value generated by calling the provided
+     * callback.
+     */
+    String replaceEach(String value, String pattern, String (*generateReplacement)())
+    {
+        while (true)
+        {
+            int index = value.indexOf(pattern);
+            if (index == -1)
+            {
+                break;
+            }
+            value = value.substring(0, index) + generateReplacement() + value.substring(index + pattern.length());
+        }
+        return value;
+    }
+
+    /**
+     * Generates a random number, encoded as a hex string.
+     */
+    String getRandom()
+    {
+        return String(random(2147483647), HEX);
+    }
+
+    /**
+     * Uses the station's MAC address to create a unique id for each device.
+     */
+    String getUniqueId()
+    {
+        uint8_t mac[6];
+        esp_read_mac(mac, ESP_MAC_WIFI_STA);
+        char macStr[13] = {0};
+        sprintf(macStr, "%02x%02x%02x%02x%02x%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+        return String(macStr);
+    }
+
+    String format(String value)
+    {
+        value = replaceEach(value, "#{random}", getRandom);
+        value.replace("#{unique_id}", getUniqueId());
+        value.replace("#{platform}", PLATFORM);
+        return value;
+    }
+
+}; // end namespace SettingValue