Sagger/json.c at master · Etua/Sagger · GitHub

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//***************************************************************************
//                          json.c
// Copyright (C) 2020 Dominik "Etua" Danelski <dominik@danelski.pl>
//***************************************************************************
//
// This file is part of Sagger.
//
// Sagger is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
//        the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
// Sagger is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Sagger. If not, see <https://www.gnu.org/licenses/>.

#include "json.h"
#include "structures.h"
#include <glib-object.h>
#include <json-glib/json-glib.h>
#include <string.h>

// JSON parser that handles the file from start to finish
// "^" will be later used as an indicator of lacking or corrupted data
void glib_parse(recording_metadata *json_result, char *json_filename) {
  JsonParser *json_parser;
  JsonNode *json_node;
  JsonReader *json_cursor = NULL;

  json_parser = json_parser_new();

  if (json_parser_load_from_file(json_parser, json_filename, NULL)) {
    json_node = json_parser_get_root(json_parser);
    json_cursor = json_reader_new(json_node);

    json_reader_read_member(json_cursor, "results");
    if (json_reader_count_elements(json_cursor) > 0) {
      // Loop is used in order to allow quick skip to the end of the function
      for (int i = 0; i < 1; i++) {
        json_reader_read_element(json_cursor, 0);

        // Read the artist's name
        json_reader_read_member(json_cursor, "recordings");
        json_reader_read_element(json_cursor, 0);
        json_reader_read_member(json_cursor, "artists");
        json_reader_read_element(json_cursor, 0);
        if (!json_reader_read_member(json_cursor, "name")) {
          json_result->song_name[0] = '^';
          break;
        }
        strcpy(json_result->artist_name,
               json_reader_get_string_value(json_cursor));
        // Cursor climbs up the structure
        json_reader_end_member(json_cursor);
        json_reader_end_element(json_cursor);
        json_reader_end_member(json_cursor);

        // Retrieve name of the album
        json_reader_read_member(json_cursor, "releasegroups");
        json_reader_read_element(json_cursor, 0);
        if (!json_reader_read_member(json_cursor, "title")) {
          json_result->song_name[0] = '^';
          break;
        }
        strcpy(json_result->album_name,
               json_reader_get_string_value(json_cursor));
        // Cursor climbs up the structure
        json_reader_end_member(json_cursor);
        json_reader_end_element(json_cursor);
        json_reader_end_member(json_cursor);

        // Retrieve song name
        if (!json_reader_read_member(json_cursor, "title")) {
          json_result->song_name[0] = '^';
          break;
        }
        strcpy(json_result->song_name,
               json_reader_get_string_value(json_cursor));
      }
    } else {
      json_result->song_name[0] = '^';
    }
  }
  // Free JSON specific objects
  g_object_unref(json_cursor);
  g_object_unref(json_parser);
}