dab246
78 lines
2.7 KiB
Dart
78 lines
2.7 KiB
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 newReplacedTextWithHttp = replacedText.replaceAllMapped(regexLinkWithHttp, (regexMatch) {
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final link = regexMatch.group(1);
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log('LinkifyHtml::_linkifyUrlAddress():link: $link');
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if (link?.isNotEmpty == true) {
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if (replacedText.contains('<a href="$link"')) {
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return link!;
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} else {
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return '<a href="$link" target="_blank">$link</a>';
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}
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} else {
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return '';
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}
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});
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replacedText = newReplacedTextWithHttp;
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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 newReplacedTextWithWWW = replacedText.replaceAllMapped(regexLinkWithWWW, (regexMatch) {
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final previousChar = regexMatch.group(1);
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log('LinkifyHtml::_linkifyUrlAddress(): previousChar: $previousChar');
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final link = regexMatch.group(2);
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log('LinkifyHtml::_linkifyUrlAddress():link: $link');
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if (link?.isNotEmpty == true) {
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if (replacedText.contains('<a href="https://$link"') || replacedText.contains('<a href="http://$link"')) {
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return link!;
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} else {
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return '$previousChar<a href="https://$link" target="_blank">$link</a>';
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}
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} else {
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return '';
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}
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});
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replacedText = newReplacedTextWithWWW;
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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 newReplacedTextWitMailTo = inputText.replaceAllMapped(regexMailTo, (regexMatch) {
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final emailAddress = regexMatch.group(1);
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if (emailAddress?.isNotEmpty == true) {
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if (inputText.contains('<a href="mailto:$emailAddress"')) {
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return emailAddress!;
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} else {
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return '<a href="mailto:$emailAddress">$emailAddress</a>';
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}
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} else {
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return '';
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}
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});
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return newReplacedTextWitMailTo;
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}
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} |