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Add .remove() and .replaceAll() functions #26

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Add .remove() and .replaceAll() functions #26

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cecd434
Allow removing and replacing emojis by random string
tspoke Nov 10, 2023
20a92b3
Remove nullable for replaceAll and remove
tspoke Nov 10, 2023
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67 changes: 46 additions & 21 deletions lib/flutter_emoji.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -213,13 +213,12 @@ class EmojiParser {
var _e = EmojiUtil.stripColons(m.group(0));
if (_e == null || m.group(0) == null) continue;
if (hasName(_e)) {
var pattern = RegExp.escape(m.group(0)!);
final pattern = RegExp.escape(m.group(0)!);
var formattedCode = get(_e).code;
if (fnFormat != null) {
formattedCode = fnFormat(formattedCode);
}
result =
result.replaceAll(RegExp(pattern, unicode: true), formattedCode);
result = result.replaceAll(RegExp(pattern, unicode: true), formattedCode);
}
}
return result;
Expand All @@ -234,24 +233,7 @@ class EmojiParser {
/// For example: 'I ❤️ Flutter' => 'I :heart: Flutter'
///
String unemojify(String text) {
if (text.isEmpty) return text;

final characters = Characters(text);
final buffer = StringBuffer();
for (final character in characters) {
if (hasEmoji(character)) {
var result = character;
result = result.replaceAll(
character,
getEmoji(character).full,
);

buffer.write(result);
} else {
buffer.write(character);
}
}
return buffer.toString();
return _mapEmojis(text, (final String emoji) => emoji.replaceAll(emoji, getEmoji(emoji).full));
}

///
Expand Down Expand Up @@ -306,6 +288,30 @@ class EmojiParser {
return buffer.toString();
}

///
/// Replace an emoji by a symbol.
///
/// For example: replace('I ❤️ coffee', '??') => 'I ?? coffee'
///
String replaceAll(final String text, final String toSymbol) {
if (toSymbol.isEmpty){
return removeEmojis(text);
}
return _mapEmojis(text, (String _) => toSymbol);
}

///
/// Remove all emojis from the input text, removing double spaces
///
/// For example: removeEmojis('I ❤️ Flutter just like ☕') => 'I Flutter just like '
String removeEmojis(final String text, {removeDoubleSpaces = true}) {
final result = _mapEmojis(text, (String _) => '');
if (removeDoubleSpaces) {
return result.replaceAll(RegExp(r'\s\s+'), ' ');
}
return result;
}

///
/// Return a list of emojis found in the input text
///
Expand All @@ -322,4 +328,23 @@ class EmojiParser {
}
return result;
}

///
/// When an emoji is found, call the transform function
///
String _mapEmojis(final String text, Function(String) transform) {
if (text.isEmpty) return "";

final characters = Characters(text);
final buffer = StringBuffer();
for (final character in characters) {
if (hasEmoji(character)) {
final result = character;
buffer.write(result.replaceAll(character, transform(character)));
} else {
buffer.write(character);
}
}
return buffer.toString();
}
}
12 changes: 12 additions & 0 deletions test/flutter_emoji_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,18 @@ void main() {
expect(emojiParser.replace('I ❤️ coffee', '❤️', '❤️‍🔥'), 'I ❤️‍🔥 coffee');
});

test('replaceAll emojis', () {
expect(emojiParser.replaceAll('I ❤️ coffee', '??'), 'I ?? coffee');
expect(emojiParser.replaceAll('I ❤️ coffee', ''), 'I coffee');
expect(emojiParser.replaceAll('I ❤️ coffee', '❤️'), 'I ❤️ coffee');
});

test('remove emojis', () {
expect(emojiParser.removeEmojis('I ❤️🔥 coffee'), 'I coffee');
expect(emojiParser.removeEmojis('I ❤️ coffee'), 'I coffee');
expect(emojiParser.removeEmojis('I love coffee 🔥'), 'I love coffee ');
});

test('parse Emojis', () {
// var equalList = (var list1, var list2) {
// if (!(list1 is List && list2 is List) || list1.length != list2.length) {
Expand Down