recipe_journal/lib/constants/cooking_units.dart

import 'package:flutter/material.dart';

import '../models/unit.dart' show Unit;
import '../src/enums.dart';

abstract class CookingUnits {
  // Fluid volume units
  static Unit get teaspoon => Unit(
        'teaspoon',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get tablespoon => Unit(
        'tablespoon',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get fluidOunce => Unit(
        'fluid ounce',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get cup => Unit(
        'cup',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get pint => Unit(
        'pint',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get quart => Unit(
        'quart',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get gallon => Unit(
        'gallon',
        UnitType.fluid,
        system: System.imperial,
      );

  static Unit get milliliter => Unit(
        'milliliter',
        UnitType.fluid,
      );

  static Unit get liter => Unit(
        'liter',
        UnitType.fluid,
      );

  // Weight units
  static Unit get ounce => Unit(
        'ounce',
        UnitType.weight,
        system: System.imperial,
      );

  static Unit get pound => Unit(
        'pound',
        UnitType.weight,
        system: System.imperial,
      );

  static Unit get gram => Unit(
        'gram',
        UnitType.weight,
      );

  static Unit get kilogram => Unit(
        'kilogram',
        UnitType.weight,
      );

  // Count units
  static Unit get piece => Unit(
        'piece',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get dozen => Unit(
        'dozen',
        UnitType.count,
        system: System.neutral,
      );

  // Informal units
  static Unit get pinch => Unit(
        'pinch',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get dash => Unit(
        'dash',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get drop => Unit(
        'drop',
        UnitType.fluid,
        system: System.neutral,
      );

  static Unit get stick => Unit(
        'stick',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get can => Unit(
        'can',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get batch => Unit(
        'batch',
        UnitType.count,
        system: System.neutral,
      );

  static Unit get handful => Unit(
        'handful',
        UnitType.count,
        system: System.neutral,
      );

  /// returns english abbreviation if available, else empty String
  static String getUnitAbbreviation(BuildContext context, Unit unit) {
    final abbreviations = {
      'teaspoon': 'tsp',
      'tablespoon': 'tbsp',
      'fluid ounce': 'fl oz',
      'cup': 'c',
      'pint': 'pt',
      'quart': 'qt',
      'gallon': 'gal',
      'milliliter': 'ml',
      'liter': 'l',
      'ounce': 'oz',
      'pound': 'lb',
      'gram': 'g',
      'kilogram': 'kg',
    };
    return abbreviations[unit.name] ?? '';
  }

  static List<Unit> get values => [
        teaspoon,
        tablespoon,
        fluidOunce,
        cup,
        pint,
        quart,
        gallon,
        milliliter,
        liter,
        ounce,
        pound,
        gram,
        kilogram,
        piece,
        dozen,
        pinch,
        dash,
        drop,
        stick,
        can,
        batch,
        handful,
      ];

  static List<Unit> getByType(UnitType type) {
    return values.where((unit) => unit.type == type).toList();
  }

  static List<Unit> getBySystem(System system) {
    return values.where((unit) => unit.system == system).toList();
  }
}