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2b1f9925e4
Dart lints added: * Avoid optional new * Avoid optional const * Prefer single quotes * Prefer default assignment `=`
72 lines
3.1 KiB
Dart
72 lines
3.1 KiB
Dart
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This file is used to generate the switch statements in the Locale class.
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// See: ../lib/ui/window.dart
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// When running this script, use the output of this script to update the
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// comments that say when the script was last run (that comment appears twice in
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// window.dart), and then replace all the map entries with the output from
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// this script (the first set for _canonicalizeLanguageCode and the second set
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// for _canonicalizeRegionCode).
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import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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const String registry = 'https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry';
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Map<String, List<String>> parseSection(String section) {
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final Map<String, List<String>> result = <String, List<String>>{};
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List<String> lastHeading;
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for (String line in section.split('\n')) {
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if (line == '')
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continue;
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if (line.startsWith(' ')) {
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lastHeading[lastHeading.length - 1] = '${lastHeading.last}${line.substring(1)}';
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continue;
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}
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final int colon = line.indexOf(':');
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if (colon <= 0)
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throw 'not sure how to deal with "$line"';
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final String name = line.substring(0, colon);
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final String value = line.substring(colon + 2);
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lastHeading = result.putIfAbsent(name, () => <String>[]);
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result[name].add(value);
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}
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return result;
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}
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Future<Null> main() async {
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final HttpClient client = HttpClient();
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final String body = (await (await (await client.getUrl(Uri.parse(registry))).close()).transform(utf8.decoder).toList()).join('');
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final List<Map<String, List<String>>> sections = body.split('%%').map<Map<String, List<String>>>(parseSection).toList();
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final Map<String, List<String>> outputs = <String, List<String>>{'language': <String>[], 'region': <String>[]};
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String fileDate;
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for (Map<String, List<String>> section in sections) {
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if (fileDate == null) {
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// first block should contain a File-Date metadata line.
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fileDate = section['File-Date'].single;
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continue;
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}
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assert(section.containsKey('Type'), section.toString());
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final String type = section['Type'].single;
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if ((type == 'language' || type == 'region') && (section.containsKey('Preferred-Value'))) {
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assert(section.containsKey('Subtag'), section.toString());
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final String subtag = section['Subtag'].single;
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final List<String> descriptions = section['Description'];
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assert(descriptions.isNotEmpty);
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assert(section.containsKey('Deprecated'));
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final String comment = section.containsKey('Comment') ? section['Comment'].single : 'deprecated ${section['Deprecated'].single}';
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final String preferredValue = section['Preferred-Value'].single;
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outputs[type].add('\'$subtag\': \'$preferredValue\', // ${descriptions.join(", ")}; $comment');
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}
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}
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print('// Mappings generated for language subtag registry as of $fileDate.');
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print('// For languageCode:');
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print(outputs['language'].join('\n'));
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print('// For regionCode:');
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print(outputs['region'].join('\n'));
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}
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