TF-2047 Handle sanitize and autolink html for input text

(cherry picked from commit 9078ef1e6fe6bf5f05c98a85f694600cfcb2129d)
2023-07-31 16:45:39 +07:00
parent 4731add0e5
commit a00c5d8230
2 changed files with 65 additions and 78 deletions
@@ -0,0 +1,65 @@
+
+import 'dart:convert';
+
+import 'package:core/utils/app_logger.dart';
+import 'package:linkify/linkify.dart';
+
+class SanitizeAutolinkFilter {
+
+  final HtmlEscape htmlEscape;
+  final _linkifyOption = const LinkifyOptions(
+    humanize: true,
+    looseUrl: true,
+    defaultToHttps: true,
+    removeWww: true
+  );
+  final _linkifier = <Linkifier>[
+    const EmailLinkifier(),
+    const UrlLinkifier()
+  ];
+
+  SanitizeAutolinkFilter(this.htmlEscape);
+
+  String process(String inputText) {
+    if (inputText.isEmpty) {
+      return '';
+    }
+
+    final elements = linkify(
+      inputText,
+      options: _linkifyOption,
+      linkifiers: _linkifier
+    );
+    log('AutolinkFilter::process:elements: $elements');
+    final htmlTextBuffer = StringBuffer();
+
+    for (var element in elements) {
+      if (element is TextElement) {
+        final escapedHtml = htmlEscape.convert(element.text);
+        htmlTextBuffer.write(escapedHtml);
+      } else if (element is EmailElement) {
+        final emailLinkTag = _buildEmailLinkTag(
+          mailToLink: element.url,
+          value: element.text
+        );
+        htmlTextBuffer.write(emailLinkTag);
+      } else if (element is UrlElement) {
+        final urlLinkTag = _buildUrlLinkTag(
+          urlLink: element.url,
+          value: element.text
+        );
+        htmlTextBuffer.write(urlLinkTag);
+      }
+    }
+
+    return htmlTextBuffer.toString();
+  }
+
+  String _buildUrlLinkTag({required String urlLink, required String value}) {
+    return '<a href="$urlLink" target="_blank">$value</a>';
+  }
+
+  String _buildEmailLinkTag({required String mailToLink, required String value}) {
+    return '<a href="$mailToLink">$value</a>';
+  }
+}