Momentum-Apps/scenes/nfc_playlist_scene_nfc_remove.c

#include "../nfc_playlist.h"

typedef enum {
   NfcPlaylistSettings_LineSelector,
   NfcPlaylistSettings_RemoveLine
} NfcPlaylistSettingsMenuSelection;

uint8_t selected_line;

void nfc_playlist_nfc_remove_menu_callback(void* context, uint32_t index) {
   NfcPlaylist* nfc_playlist = context;
   scene_manager_handle_custom_event(nfc_playlist->scene_manager, index);
}

void nfc_playlist_nfc_remove_options_change_callback(VariableItem* item) {
   NfcPlaylist* nfc_playlist = variable_item_get_context(item);

   uint8_t current_option = variable_item_list_get_selected_item_index(nfc_playlist->variable_item_list);
   uint8_t option_value_index = variable_item_get_current_value_index(item);
   
   switch(current_option) {
      case NfcPlaylistSettings_LineSelector: {
         selected_line = option_value_index + 1;
         FuriString* tmp_str = furi_string_alloc_printf("%d", selected_line);
         variable_item_set_current_value_text(item, furi_string_get_cstr(tmp_str));
         furi_string_free(tmp_str);
         break;
      }
      default:
         break;
   }
}

void nfc_playlist_nfc_remove_scene_on_enter(void* context) {
   NfcPlaylist* nfc_playlist = context;

   selected_line = nfc_playlist->settings.playlist_length;

   variable_item_list_set_header(nfc_playlist->variable_item_list, "Settings");

   VariableItem* Line_selector = variable_item_list_add(
      nfc_playlist->variable_item_list,
      "Select Line",
      nfc_playlist->settings.playlist_length,
      nfc_playlist_nfc_remove_options_change_callback,
      nfc_playlist);
   variable_item_set_current_value_index(Line_selector, nfc_playlist->settings.playlist_length - 1);

   FuriString* tmp_str = furi_string_alloc_printf("%d", selected_line);
   variable_item_set_current_value_text(Line_selector, furi_string_get_cstr(tmp_str));
   furi_string_free(tmp_str);

   variable_item_set_locked(Line_selector, nfc_playlist->settings.playlist_length == 0 ? true : false, "Playlist\nis empty");

   variable_item_list_add(nfc_playlist->variable_item_list, "Remove Line", 0, NULL, NULL);
   variable_item_set_locked(variable_item_list_get(nfc_playlist->variable_item_list, NfcPlaylistSettings_RemoveLine), nfc_playlist->settings.playlist_length == 0 ? true : false, "Playlist\nis empty");

   variable_item_list_set_enter_callback(nfc_playlist->variable_item_list, nfc_playlist_nfc_remove_menu_callback, nfc_playlist);

   view_dispatcher_switch_to_view(nfc_playlist->view_dispatcher, NfcPlaylistView_VariableItemList);
}

bool nfc_playlist_nfc_remove_scene_on_event(void* context, SceneManagerEvent event) {
   NfcPlaylist* nfc_playlist = context;
   bool consumed = false;
   if (event.type == SceneManagerEventTypeCustom) {
      switch(event.event) {
         case NfcPlaylistSettings_RemoveLine:
            Storage* storage = furi_record_open(RECORD_STORAGE);
            Stream* stream = file_stream_alloc(storage);

            if (file_stream_open(stream, furi_string_get_cstr(nfc_playlist->settings.playlist_path), FSAM_READ_WRITE, FSOM_OPEN_EXISTING)) {
               FuriString* line = furi_string_alloc();
               FuriString* tmp_str = furi_string_alloc();
               uint8_t current_line = 0;
               while(stream_read_line(stream, line)) {
                  current_line++;
                  if (current_line != selected_line) {
                     furi_string_replace_all(line, "\n", "");
                     if (furi_string_empty(tmp_str)) {
                        furi_string_cat_printf(tmp_str, "%s", furi_string_get_cstr(line));
                     } else {
                        furi_string_cat_printf(tmp_str, "\n%s", furi_string_get_cstr(line));
                     }
                  }
               }

               furi_string_free(line);
               stream_clean(stream);
               stream_write_string(stream, tmp_str);
               furi_string_free(tmp_str);
               file_stream_close(stream);
               nfc_playlist->settings.playlist_length--;
               selected_line = nfc_playlist->settings.playlist_length;
            }
            stream_free(stream);
            furi_record_close(RECORD_STORAGE);

            if (selected_line == 0) {
               scene_manager_previous_scene(nfc_playlist->scene_manager);
            } else {
               VariableItem* Line_selector = variable_item_list_get(nfc_playlist->variable_item_list, NfcPlaylistSettings_LineSelector);
               variable_item_set_values_count(Line_selector, nfc_playlist->settings.playlist_length);
               variable_item_set_current_value_index(Line_selector, selected_line - 1);

               FuriString* tmp_str = furi_string_alloc_printf("%d", selected_line);
               variable_item_set_current_value_text(Line_selector, furi_string_get_cstr(tmp_str));
               furi_string_free(tmp_str);
            }

            consumed = true;
            break;
         default:
            break;
      }
   }
   return consumed;
}

void nfc_playlist_nfc_remove_scene_on_exit(void* context) {
   NfcPlaylist* nfc_playlist = context;
   variable_item_list_reset(nfc_playlist->variable_item_list);
}