# flappy_translator A tool which automatically generates Flutter localization resources from CSV and Excel files. This is especially useful as any team member can edit the CSV/Excel file, with the subsequent translations imported into the project via a terminal command. Basic variables (strings and integers) are supported, however neither genders nor plurals are planned to be supported. If you require such functionality, consider using [arb_generator](https://pub.dev/packages/arb_generator). Note that as of version 2.0.0, null safe code is generated. Please use version 1.5.0 for non-null safe projects. ## Getting Started In order to use the *flappy_translator* package, please provide your translations in a CSV or Excel file. For CSV files, delimiters `,` and `;` have been tested to work. | keys | fr | en | en_GB | de | | ------------- | ---------------------------------- | ---------------------------- | ------------------------------ | ----------------------------- | | plainText | Bonjour le monde! | Hello world! | Hello world! | Hallo Welt! | | welcome | Bienvenu %name$s! | Welcome %name$s! | Welcome %name$s! | Willkommen %name$s! | | favoriteColor | Quelle est votre couleur préférée? | What is your favorite color? | What is your favourite colour? | Was ist deine Lieblingsfarbe? | Localizations can be specified for a region by appending the country code. ### Add dependency ```yaml dependencies: flutter_localizations: sdk: flutter dev_dependencies: flappy_translator: ``` ### Define Settings Settings for *flappy_translator* must set in your project's *pubspec.yaml* file. `input_file_path` is the only required parameter. ```yaml flappy_translator: input_file_path: "test.csv" output_dir: "lib" file_name: "i18n" class_name: "I18n" delimiter: "," start_index: 1 depend_on_context: true use_single_quotes: false replace_no_break_spaces: false expose_get_string: false expose_loca_strings: false expose_locale_maps: false generate_comments: false comment_languages: [] ``` | Setting | Default | Description | | ----------------------- | ------- | ---------------------------------------------------------------------------------- | | input_file_path | N/A | Required. A path to the input CSV/Excel file. | | output_dir | lib | A directory to generate the output file. | | file_name | i18n | A filename for the generated file. | | class_name | I18n | A class name for the generated file. | | delimiter | , | CSV files only: a delimited to separate columns in the input CSV file. | | start_index | 1 | The column index where translations begin (i.e. column index of default language). | | depend_on_context | true | Whether the generated localizations should depend on *BuildContext* | | use_single_quotes | false | Whether the generated file should use single or double quotes for strings. | | replace_no_break_spaces | false | Whether no break spaces (\u00A0) should be replaced with normal spaces (\u0020). | | expose_get_string | false | The default value for whether a getString method should be exposed. | | expose_loca_strings | false | The default value for whether a locaStrings getter should be exposed. | | expose_locale_maps | false | The default value for whether a localeMaps getter should be exposed. | | generate_comments | false | Whether documentation comments should be used to display translations. | | comment_languages | [] | Languages that are displayed in the comments. Empty -> All languages are used. | ### Run package Make sure that your current working directory is the project root. ```sh flutter pub get flutter pub run flappy_translator ``` ### Update iOS Info.plist For iOS, *ios/Runner/Info.plist* needs to be updated with an array of the languages that the app will supports: ```plist CFBundleLocalizations fr en de ``` For more information, see [Internationalizing Flutter apps](https://flutter.dev/docs/development/accessibility-and-localization/internationalization#appendix-updating-the-ios-app-bundle). ### Use the i18n generated file The package used your input file in order to generate a file named *file_name* in *output_dir* you provided. The following example uses the default *class_name* I18n with a dependency on *BuildContext*. Firstly, add the I18nDelegate to your delegates: ```dart class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( localizationsDelegates: const [ I18nDelegate(), GlobalMaterialLocalizations.delegate, GlobalWidgetsLocalizations.delegate, GlobalCupertinoLocalizations.delegate, ], supportedLocales: I18nDelegate.supportedLocals, home: const Home(), ); } } ``` Then use the generated I18n class! ```dart class Home extends StatelessWidget { const Home({super.key}); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('flappy_translator'), ), body: Center( child: Column( mainAxisSize: MainAxisSize.min, children: [ Text(I18n.of(context).plainText), Text(I18n.of(context).welcome(name: 'Dash')), Text(I18n.of(context).favoriteColor), ], ), ), ); } } ``` Please see [example](example/) for more information. ### Material Localizations Supporting a language (i.e. ga or cy) not included in GlobalMaterialLocalizations requires adding a material localization class and delegate. Although this is out of the scope of this package, a warning is logged to the console during code generation. [More info](https://flutter.dev/docs/development/accessibility-and-localization/internationalization#adding-support-for-a-new-language). ## Rules and functionalities ### Locale Locales are specified in the top row and are expected to be given in the form `en` or `en_US`. ### Default language The column at `start_index` is considered the default language. This means that: 1. If this column does not have a value, the loca key instead will be used. 2. If another language does not have translations for a given key, the value of the default language will be used. ### Keys Each loca key must begin with a lowercase letter, after which any combinations of lowercase, uppercase, digits or underscores are valid. ### Variables In order to include variables in loca strings, they need to be written in the format `%$`. Presently only integers and strings are supported as variable types. * %myVariable$d (`d` stands for an int) * %myVariable$s (`s` stands for a String) All variables are required. Consider the key `welcome` from example. The generated function signature is ```dart String welcome({ required String name, }) ``` Note that if the variable's name starts with a number, the generated variable name will be `var`. So, for instance, `%1$d` would become `var1`.

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