chore(sources): Initial commit files

lib/builder.dart

@@ -0,0 +1,101 @@
+import 'dart:convert';
+
+import 'package:build/build.dart';
+import 'package:code_builder/code_builder.dart';
+import 'package:dart_style/dart_style.dart';
+import 'package:meta/meta.dart';
+import 'package:recase/recase.dart';
+
+import 'models.dart';
+
+final _dartfmt = DartFormatter();
+
+Builder genFromJson(BuilderOptions options) {
+  final parsedOptions = GeneratorOptions.fromOptions(options);
+
+  return IcomoonBuilder(parsedOptions);
+}
+
+class GeneratorOptions {
+  GeneratorOptions({
+    @required this.fontName,
+    @required this.selectionJsonPath,
+  });
+
+  factory GeneratorOptions.fromOptions(BuilderOptions options) {
+    final config = options.config;
+
+    assert(
+      config['font_name'] != null,
+      'fontName must not be null',
+    );
+
+    return GeneratorOptions(
+      fontName: config['font_name'] as String,
+      selectionJsonPath: config['selection_json_path'] as String,
+    );
+  }
+
+  final String fontName;
+  final String selectionJsonPath;
+}
+
+class IcomoonBuilder implements Builder {
+  IcomoonBuilder(this.options);
+
+  final GeneratorOptions options;
+
+  @override
+  Future build(BuildStep buildStep) async {
+    final inputId = buildStep.inputId;
+
+    final contents = await buildStep.readAsString(inputId);
+    final selection = SelectionModel.fromJson(
+      jsonDecode(contents) as Map<String, dynamic>,
+    );
+
+    final fields = selection.icons.map((icon) {
+      final props = icon.properties;
+      final code = props.code.toRadixString(16);
+      final name = ReCase(props.name).snakeCase;
+
+      return Field((b) => b
+        ..name = name
+        ..static = true
+        ..modifier = FieldModifier.constant
+        ..type = refer('IconData', 'package:flutter/widgets.dart')
+        ..assignment = Code('IconData(0x$code, fontFamily: _kFontFam)'));
+    });
+
+    final icomoonClass = Class((b) => b
+      ..name = 'Icomoon'
+      ..constructors.add(Constructor((b) => b..name = '_'))
+      ..fields.add(Field(
+        (b) => b
+          ..name = '_kFontFam'
+          ..static = true
+          ..modifier = FieldModifier.constant
+          ..assignment = Code("'${options.fontName}'"),
+      ))
+      ..fields.addAll(fields));
+    final content = Library(
+      (b) => b.body..add(icomoonClass),
+    ).accept(DartEmitter(Allocator()));
+
+    await buildStep.writeAsString(
+      buildStep.inputId.changeExtension('.dart'),
+      _dartfmt.format('''
+        // Generated by icomoon_selection_gen, do not modify by hand
+        
+        // ignore_for_file: constant_identifier_names
+
+        $content
+      '''),
+    );
+  }
+
+  @override
+  Map<String, List<String>> get buildExtensions => {
+        '.json': ['.dart']
+      };
+}

lib/models.dart

@@ -0,0 +1,44 @@
+import 'package:meta/meta.dart';
+
+class SelectionModel {
+  SelectionModel({
+    @required this.icons,
+  });
+
+  factory SelectionModel.fromJson(Map<String, dynamic> json) {
+    final icons = json['icons'] as List<dynamic>;
+
+    return SelectionModel(
+        icons: icons
+            .map((icon) => IcomoonIcon.fromJson(icon as Map<String, dynamic>))
+            .toList());
+  }
+
+  final List<IcomoonIcon> icons;
+}
+
+class IcomoonIcon {
+  IcomoonIcon({@required this.properties});
+
+  factory IcomoonIcon.fromJson(Map<String, dynamic> json) {
+    final properties = json['properties'] as Map<String, dynamic>;
+
+    return IcomoonIcon(properties: IconProperties.fromJson(properties));
+  }
+
+  final IconProperties properties;
+}
+
+class IconProperties {
+  IconProperties({@required this.name, @required this.code});
+
+  factory IconProperties.fromJson(Map<String, dynamic> json) {
+    return IconProperties(
+      name: json['name'] as String,
+      code: json['code'] as int,
+    );
+  }
+
+  final String name;
+  final int code;
+}