Could we add a more user friendly API?

It would be cool to have an easier Interface as an extension to your package which allows the extraction of the Icons like this:

///searches all libs and returns the first finding
IconData data = IconCache('altimeter')
///searches only Material Icons 
IconData data = IconCache('altimeter', IconLib.mdi)
///searches only Material Icons 
IconData data = IconCache('mdi.altimeter')

all methods return a default icon if no Icon is found (could be changed to null). This addresses #12

Here is the implimentation:

import 'package:flutter/material.dart';
import 'package:flutter_icons/flutter_icons.dart';
import 'package:logging/logging.dart';

final _log = new Logger('ui.icon_cache.dart');

enum IconLib {
  ///All Icons
  all,

  ///Ant Design Icons
  ant,

  ///Entypo Icons
  ent,

  ///Evil Icons
  evi,

  ///Feather Icons
  fea,

  ///Font Awesome Icons
  faw,

  ///Foundation Icons
  fou,

  ///Ionicons Icons
  ion,

  ///Material Community Icons
  mco,

  ///Material Icons
  mdi,

  ///Octicons Icons
  oct,

  ///Simple Line Icons
  sli,

  ///Zocial Icons
  zoc,

  ///Weather Icons
  wea
}

class IconCache {
  static final IconCache _singleton = new IconCache._internal();

  factory IconCache() {
    return _singleton;
  }

  IconCache._internal();

  IconData operator [](String name) {
    return _singleton.icon(name);
  }

  IconLib _fromString(String iconLibEnumPrefix) => IconLib.values.firstWhere(
      (e) => e.toString().split('.').last == iconLibEnumPrefix,
      orElse: null);

  // The format is like 'mdi.car' which loads the car
  // icon from the Material Design Icons
  //if the name contains the prefix separated with a dot and the prefix
  // is the default than the prefix is taken from the name. e.g. mdi.car
  IconData icon(String name, {IconLib prefix = IconLib.all}) {
    String iconName;
    IconLib namePrefix;

    //if the name contains the prefix separated with a dot and the prefix
    // is the default than the prefix is taken from the name. e.g. mdi.car
    if (name.contains('.') && prefix == IconLib.all) {
      namePrefix = _fromString(name.split('.').first);
      iconName = name.split('.').last;
      //defaults to all lib
      if (namePrefix == null || iconName == null) throw ArgumentError();
      return _iconInternal(namePrefix, iconName);
    } else {
      return _iconInternal(prefix, name);
    }
  }

  IconData _iconInternal(IconLib prefix, String name) {
    IconData data;
    if (prefix != IconLib.all) {
      data = _extractIconFromSpecificLib(prefix, name);
      if (data == null || data.codePoint == null) {
        _log.finest('Could not load Icon $name ');
        return MaterialIcons.getIconData('error');
      } else {
        return data;
      }
    }
    return _searchIconsInAllLibs(data, name, prefix);
  }

  _searchIconsInAllLibs(IconData data, String name, IconLib prefix) {
    try {
      //return MdiIcons()[name];
      data = _searchMaterialIcons(name);

      if (data == null) {
        data = _searchMaterialCommunityIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchMaterialCommunityIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchAntDesignIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchEntypoIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchEvilIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchFeatherIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchFontAwesomeIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchFoundationIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchIonIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchOcticonsIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchSimpleLineIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchZocialIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        data = _searchWeatherIcons(name);
      } else {
        return data;
      }
      if (data == null) {
        _log.finest('Could not load Icon $name from lib: $prefix');
        return MaterialIcons.getIconData('error');
      } else {
        _log.finest('Could not load Icon $name, from lib: $prefix}');
        return MaterialIcons.getIconData('error');
      }
    } catch (e) {
      _log.finest(
          'Could not load Icon $name, from lib: $prefix, Error: ${e.toString()}');
      return MaterialIcons.getIconData('error');
    }
  }

  IconData _extractIconFromSpecificLib(IconLib prefix, String name) {
    switch (prefix) {
      case IconLib.ant:
        return _searchAntDesignIcons(name);
        break;
      case IconLib.all:
        _log.finest('Could not load Icon $name');
        return MaterialIcons.getIconData('error');

        break;
      case IconLib.ent:
        return _searchEntypoIcons(name);
        break;
      case IconLib.evi:
        return _searchEvilIcons(name);
        break;
      case IconLib.fea:
        return _searchFeatherIcons(name);
        break;
      case IconLib.faw:
        return _searchFontAwesomeIcons(name);
        break;
      case IconLib.fou:
        return _searchFoundationIcons(name);
        break;
      case IconLib.ion:
        return _searchIonIcons(name);
        break;
      case IconLib.mco:
        return _searchMaterialCommunityIcons(name);
        break;
      case IconLib.mdi:
        return _searchMaterialIcons(name);
        break;
      case IconLib.oct:
        return _searchOcticonsIcons(name);
        break;
      case IconLib.sli:
        return _searchSimpleLineIcons(name);
        break;
      case IconLib.zoc:
        return _searchZocialIcons(name);
        break;
      case IconLib.wea:
        return _searchWeatherIcons(name);
        break;
      default:
        {
          _log.finest('Could not load Icon $name');
          return MaterialIcons.getIconData('error');
        }
    }
  }

  IconData _searchWeatherIcons(String name) {
    IconData data = WeatherIcons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchZocialIcons(String name) {
    IconData data = Zocial.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchSimpleLineIcons(String name) {
    IconData data = SimpleLineIcons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchOcticonsIcons(String name) {
    IconData data = Octicons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchIonIcons(String name) {
    IconData data = Ionicons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchFoundationIcons(String name) {
    IconData data = Foundation.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchFontAwesomeIcons(String name) {
    IconData data = FontAwesome.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchFeatherIcons(String name) {
    IconData data = Feather.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchEvilIcons(String name) {
    IconData data = EvilIcons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchEntypoIcons(String name) {
    IconData data = Entypo.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchAntDesignIcons(String name) {
    IconData data = AntDesign.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchMaterialIcons(String name) {
    IconData data = MaterialIcons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }

  IconData _searchMaterialCommunityIcons(String name) {
    IconData data = MaterialCommunityIcons.getIconData(name);
    if (data == null || data.codePoint == null) {
      return null;
    } else {
      return data;
    }
  }
}

flutter-studio / flutter-icons

Could we add a more user friendly API? #14