WIP: add kanjivg data

lib/_data_ingestion/kanjivg/objects.dart

@@ -0,0 +1,92 @@
+import 'package:jadb/_data_ingestion/sql_writable.dart';
+
+/// Enum set in the kvg:position attribute, used by `<g>` elements in the KanjiVG SVG files.
+enum KanjiPathGroupPosition {
+  bottom,
+  kamae,
+  kamaec,
+  left,
+  middle,
+  nyo,
+  nyoc,
+  right,
+  tare,
+  tarec,
+  top,
+}
+
+/// Contents of a \<g> element in the KanjiVG SVG files.
+class KanjiPathGroupTreeNode extends SQLWritable {
+  final String id;
+  final List<KanjiPathGroupTreeNode> children;
+  final String? element;
+  final String? original;
+  final KanjiPathGroupPosition? position;
+  final String? radical;
+  final int? part;
+
+  KanjiPathGroupTreeNode({
+    required this.id,
+    this.children = const [],
+    this.element,
+    this.original,
+    this.position,
+    this.radical,
+    this.part,
+  });
+
+  @override
+  Map<String, Object?> get sqlValue => {
+    'id': id,
+    'element': element,
+    'original': original,
+    'position': position?.name,
+    'radical': radical,
+    'part': part,
+  };
+}
+
+/// Contents of a `<text>` element in the StrokeNumber's group in the KanjiVG SVG files
+class KanjiStrokeNumber extends SQLWritable {
+  final int num;
+  final double x;
+  final double y;
+
+  KanjiStrokeNumber(this.num, this.x, this.y);
+
+  @override
+  Map<String, Object?> get sqlValue => {'num': num, 'x': x, 'y': y};
+}
+
+/// Contents of a `<path>` element in the KanjiVG SVG files
+class KanjiVGPath extends SQLWritable {
+  final String id;
+  final String type;
+  final String svgPath;
+
+  KanjiVGPath({required this.id, required this.type, required this.svgPath});
+
+  @override
+  Map<String, Object?> get sqlValue => {
+    'id': id,
+    'type': type,
+    'svgPath': svgPath,
+  };
+}
+
+class KanjiVGItem extends SQLWritable {
+  final String character;
+  final List<KanjiVGPath> paths;
+  final List<KanjiStrokeNumber> strokeNumbers;
+  final List<KanjiPathGroupTreeNode> pathGroups;
+
+  KanjiVGItem({
+    required this.character,
+    required this.paths,
+    required this.strokeNumbers,
+    required this.pathGroups,
+  });
+
+  @override
+  Map<String, Object?> get sqlValue => {'character': character};
+}

lib/_data_ingestion/kanjivg/seed_data.dart

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+import 'package:sqflite_common/sqflite.dart';
+
+Future<void> seedKanjiVGData(Iterable<String> xmlContents, Database db) async {
+  final b = db.batch();
+
+  await b.commit(noResult: true);
+}