utils to update icon fonts

font_scripts/.fantasticonrc

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+module.exports = {
+    formatOptions: {
+        svg: {
+            centerHorizontally: true,
+            centerVertically: true
+        }
+    }
+};

font_scripts/.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+build/

font_scripts/.metadata

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+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "db7ef5bf9f59442b0e200a90587e8fa5e0c6336a"
+  channel: "stable"
+
+project_type: package

font_scripts/LICENSE

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+TODO: Add your license here.

font_scripts/README.md

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+# Font Scripts
+Scripts to update the SBB CDN icon fonts from https://icons.app.sbb.ch/
+
+## Usage
+Make sure, npm and fvm flutter are installed.
+
+### First usage
+```shell
+npm i
+fvm flutter pub get
+```
+
+### every update
+```shell
+dart lib/update_icon_fonts.dart
+```

font_scripts/analysis_options.yaml

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+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

font_scripts/lib/update_icon_fonts.dart

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+import 'dart:convert';
+import 'dart:io';
+
+import 'package:console_bars/console_bars.dart';
+import 'package:http/http.dart';
+import 'package:version/version.dart';
+
+final baseUri = Uri.https('icons.app.sbb.ch');
+final basePath = ['icons'];
+
+late FillingBar progress;
+
+Future<void> main() async {
+  final uri = makeUrlUri('index.json');
+  final response = await get(uri);
+  final decoded = utf8.decode(response.bodyBytes);
+  final responseJson = jsonDecode(decoded);
+  final versionFile = File('icons/.version');
+  final newVersion = responseJson['version'];
+
+  print('Version: $newVersion');
+  if (await versionFile.exists()) {
+    final oldVersion = await versionFile.readAsString();
+    if (Version.parse(oldVersion) >= Version.parse(newVersion)) {
+      print('already imported. exiting…');
+      return;
+    }
+  }
+
+  final icons = responseJson['icons'] as List<dynamic>;
+  final total = icons
+      .cast<Map<String, dynamic>>()
+      .where((e) =>
+          (e['tags'] as List).cast<String>().any((t) => t.contains('Size=')))
+      .length;
+  progress = FillingBar(total: total + 4, width: 10, desc: 'Downloading icons');
+
+  await prepareIcons('small', icons);
+  await prepareIcons('medium', icons);
+  await prepareIcons('large', icons);
+
+  await Directory('icons/small').create(recursive: true);
+  await Directory('icons/medium').create(recursive: true);
+  await Directory('icons/large').create(recursive: true);
+
+  progress.desc = 'Preparing icons';
+  await Process.run('npm', ['install'], runInShell: true);
+  progress.increment();
+  await Process.run('npm', ['run', 'fix'], runInShell: true);
+  progress.increment();
+  await Process.run('npm', ['run', 'generate'], runInShell: true);
+  progress.increment();
+  progress.desc = 'Generating dart files';
+  await createFlutterFontMap();
+  progress.increment();
+
+  await File('icons/.version').writeAsString(newVersion);
+}
+
+Uri makeUrlUri(String path) {
+  final uri = Uri(pathSegments: basePath.followedBy([path]));
+  return baseUri.resolveUri(uri);
+}
+
+Future<void> prepareIcons(String type, List<dynamic> icons) async {
+  final filter = icons.where((e) => e['tags'].contains('Size=$type'));
+  final dir = await Directory('icons/$type-tmp').create(recursive: true);
+  final downloads = <Future<void>>[];
+  for (final icon in filter) {
+    final name = icon['name'];
+    final fileName = '$name.svg';
+    final svgUri = makeUrlUri(fileName);
+    final download = downloadSvg(
+      svgUri,
+      fileName.replaceAll('-', '_'),
+      dir.path,
+    );
+    downloads.add(download);
+  }
+
+  await Future.wait(downloads);
+}
+
+Future<void> downloadSvg(Uri uri, String fileName, String path) async {
+  final svg = await get(uri);
+  await File('$path/$fileName').writeAsBytes(svg.bodyBytes);
+  progress.increment();
+}
+
+Future<void> createFlutterFontMap() async {
+  final sb = StringBuffer();
+
+  final small = await getMap('small');
+  final medium = await getMap('medium');
+  final large = await getMap('large');
+  mapFont(String name, String value) =>
+      sb.writeln('  static const ${name} = $value;');
+
+  sb.writeln('library sbb_icons;');
+  sb.writeln();
+  sb.writeln('import \'package:flutter/material.dart\';');
+  sb.writeln();
+  sb.writeln('const sbbIconSizeSmall = 24.0;');
+  sb.writeln('const sbbIconSizeMedium = 36.0;');
+  sb.writeln('const sbbIconSizeLarge = 48.0;');
+  sb.writeln();
+  sb.writeln('const smallFontFamily = \'packages/design_system_flutter/SBBIconsSmall\';');
+  sb.writeln('const mediumFontFamily = \'packages/design_system_flutter/SBBIconsMedium\';');
+  sb.writeln('const largeFontFamily = \'packages/design_system_flutter/SBBIconsLarge\';');
+  sb.writeln();
+  sb.writeln('sealed class SBBIcons {');
+  small.entries.forEach((e) => mapFont(e.key, e.value));
+  medium.entries.forEach((e) => mapFont(e.key, e.value));
+  large.entries.forEach((e) => mapFont(e.key, e.value));
+  sb.writeln('}');
+
+  await File('icons/sbb_icons.dart').writeAsString(sb.toString());
+
+  mapFont2(String name) =>
+      sb.writeln('    {\'icon\': SBBIcons.$name, \'name\': \'$name\'},');
+
+  sb.clear();
+  sb.writeln('import \'package:design_system_flutter/design_system_flutter.dart\';');
+  sb.writeln();
+  sb.writeln('sealed class SBBIconsIndex {');
+  sb.writeln('  static const iconsSmall = [');
+  small.entries.forEach((e) => mapFont2(e.key));
+  sb.writeln('  ];');
+  sb.writeln('  static const iconsMedium = [');
+  medium.entries.forEach((e) => mapFont2(e.key));
+  sb.writeln('  ];');
+  sb.writeln('  static const iconsLarge = [');
+  large.entries.forEach((e) => mapFont2(e.key));
+  sb.writeln('  ];');
+  sb.writeln('}');
+
+  await File('icons/sbb_icons_index.dart').writeAsString(sb.toString());
+}
+
+Future<Map<String, String>> getMap(String type) async {
+  final name = 'SBBIcons$type';
+  final fontFamily = '${type}FontFamily';
+  final uri = Uri.parse('icons/$name.json');
+  final file = File.fromUri(uri);
+  final json = await file.readAsString();
+  final map = jsonDecode(json) as Map<String, dynamic>;
+  return map.map((key, value) {
+    final v = value.toRadixString(16);
+    return MapEntry(key, 'IconData(0x$v, fontFamily: $fontFamily)');
+  });
+}