dab246
79 lines
2.6 KiB
Dart
79 lines
2.6 KiB
Dart
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import 'package:collection/collection.dart';
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import 'package:core/utils/app_logger.dart';
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class LinkifyHtml {
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String generateLinkify(String inputText) {
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var replacedText = _linkifyUrlAddress(inputText);
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replacedText = _linkifyMailToAddress(replacedText);
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return replacedText;
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}
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RegExp _generateRegExp(String pattern) {
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return RegExp(pattern, multiLine: true, caseSensitive: false);
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}
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/// URLs starting with http://, https://, ftp://, or "www." without //.
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String _linkifyUrlAddress(String inputText) {
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var replacedText = inputText;
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// URLs starting with http://, https://, ftp://
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final regexLinkWithHttp = _generateRegExp(r'(\b(https?|ftp):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])');
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final listUrlMatch = regexLinkWithHttp.allMatches(replacedText)
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.map((regexMatch) => regexMatch.group(1))
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.whereNotNull()
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.toSet();
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log('ConvertUrlStringToHtmlLinksTransformers::_linkifyUrlAddress(): listUrlMatch: $listUrlMatch');
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if (listUrlMatch.isNotEmpty) {
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listUrlMatch.forEach((link) {
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replacedText = replacedText.replaceAll(
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link,
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'<a href="$link" target="_blank">$link</a>');
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});
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}
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// URLs starting with "www." without // before it or it'd re-link the ones done above.
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final regexLinkWithWWW = _generateRegExp(r'(^|[^\/])(www\.[\S]+(\b|\$))');
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final listLinkMatch = regexLinkWithWWW.allMatches(replacedText)
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.map((regexMatch) => regexMatch.group(2))
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.whereNotNull()
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.toSet();
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log('ConvertUrlStringToHtmlLinksTransformers::_linkifyUrlAddress(): listLinkMatch: $listLinkMatch');
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if (listLinkMatch.isNotEmpty) {
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listLinkMatch.forEach((link) {
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replacedText = replacedText.replaceAll(
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link,
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'<a href="https://$link" target="_blank">$link</a>');
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});
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}
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return replacedText;
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}
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/// Change email addresses to mailto:: links.
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String _linkifyMailToAddress(String inputText) {
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final regexMailTo = _generateRegExp(r'(([a-zA-Z0-9\-\_\.])+@[a-zA-Z\_]+?(\.[a-zA-Z]{2,6})+)');
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final listEmailAddressMatch = regexMailTo.allMatches(inputText)
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.map((regexMatch) => regexMatch.group(1))
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.whereNotNull()
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.toSet();
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log('ConvertUrlStringToHtmlLinksTransformers::generateLinkifyHtml(): listEmailAddressMatch: $listEmailAddressMatch');
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if (listEmailAddressMatch.isNotEmpty) {
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listEmailAddressMatch.forEach((emailAddress) {
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inputText = inputText.replaceAll(
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emailAddress,
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'<a href="mailto:$emailAddress">$emailAddress</a>');
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});
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}
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return inputText;
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}
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} |