init commit

bin/radkfile/objects.dart

@@ -0,0 +1,13 @@
+class Radical {
+  final String radical;
+  final String kanji;
+
+  // TODO:
+  final String something;
+
+  const Radical({
+    required this.radical,
+    required this.kanji,
+    required this.something,
+  });
+}

bin/radkfile/parser.dart

@@ -0,0 +1,32 @@
+import 'dart:io';
+
+import 'package:sqflite_common/sqlite_api.dart';
+
+Future<void> addDataFromRADKFILE(Database db) async {
+  final String content = File('data/radkfile_utf8').readAsStringSync();
+  final Iterable<String> blocks =
+      content.replaceAll(RegExp(r'^#.*$'), '').split(r'$').skip(2);
+
+  print('[RADKFILE] Writing to database...');
+  final b = db.batch();
+
+  for (final block in blocks) {
+    final String radical = block[1];
+    final List<String> kanjiList = block
+        .replaceFirst(RegExp(r'.*\n'), '')
+        .split('')
+      ..removeWhere((e) => e == '' || e == '\n');
+
+    for (final kanji in kanjiList.toSet()) {
+      b.insert(
+        'RADKFILE',
+        {
+          'radical': radical,
+          'kanji': kanji,
+        },
+      );
+    }
+  }
+
+  b.commit();
+}