Add UART Terminal app

by cool4uma

https://github.com/cool4uma/UART_Terminal/tree/main

applications/plugins/uart_terminal/uart_validators.c

@@ -0,0 +1,57 @@
+#include <furi.h>
+#include "uart_validators.h"
+#include <storage/storage.h>
+
+struct ValidatorIsFile {
+    char* app_path_folder;
+    const char* app_extension;
+    char* current_name;
+};
+
+bool validator_is_file_callback(const char* text, FuriString* error, void* context) {
+    furi_assert(context);
+    ValidatorIsFile* instance = context;
+
+    if(instance->current_name != NULL) {
+        if(strcmp(instance->current_name, text) == 0) {
+            return true;
+        }
+    }
+
+    bool ret = true;
+    FuriString* path = furi_string_alloc_printf(
+        "%s/%s%s", instance->app_path_folder, text, instance->app_extension);
+    Storage* storage = furi_record_open(RECORD_STORAGE);
+    if(storage_common_stat(storage, furi_string_get_cstr(path), NULL) == FSE_OK) {
+        ret = false;
+        furi_string_printf(error, "This name\nexists!\nChoose\nanother one.");
+    } else {
+        ret = true;
+    }
+    furi_string_free(path);
+    furi_record_close(RECORD_STORAGE);
+
+    return ret;
+}
+
+ValidatorIsFile* validator_is_file_alloc_init(
+    const char* app_path_folder,
+    const char* app_extension,
+    const char* current_name) {
+    ValidatorIsFile* instance = malloc(sizeof(ValidatorIsFile));
+
+    instance->app_path_folder = strdup(app_path_folder);
+    instance->app_extension = app_extension;
+    if(current_name != NULL) {
+        instance->current_name = strdup(current_name);
+    }
+
+    return instance;
+}
+
+void validator_is_file_free(ValidatorIsFile* instance) {
+    furi_assert(instance);
+    free(instance->app_path_folder);
+    free(instance->current_name);
+    free(instance);
+}