Momentum-Apps/scenes/nfc_playlist_scene_nfc_remove.c

#include "../nfc_playlist.h"

typedef enum {
   NfcPlaylistNfcRemove_LineSelector,
   NfcPlaylistNfcRemove_RemoveLine
} NfcPlaylistNfcRemoveMenuSelection;

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 NfcPlaylistNfcRemove_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, "Remove Nfc Item");

   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");

   VariableItem* remove_button =
      variable_item_list_add(nfc_playlist->variable_item_list, "Remove Line", 0, NULL, NULL);
   variable_item_set_locked(
      remove_button,
      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 NfcPlaylistNfcRemove_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_trim(line);
                  if(!furi_string_empty(tmp_str)) {
                     furi_string_cat(tmp_str, "\n");
                  }
                  furi_string_cat(tmp_str, 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, NfcPlaylistNfcRemove_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);
}