From c7a111d6252eafefd5b4efc51c5fff8de275c7e0 Mon Sep 17 00:00:00 2001
From: Sivan Ratson <89018301+Sivan22@users.noreply.github.com>
Date: Sun, 24 Nov 2024 22:00:33 +0200
Subject: [PATCH] fix: upgrade docx support added support for: * italic *
 underscore * footenotes (after each paragraph) * font size - big or small *
 font family * font color

---
 lib/utils/docx_to_otzaria.dart | 127 +++++++++++++++++++++++++++++----
 1 file changed, 112 insertions(+), 15 deletions(-)

diff --git a/lib/utils/docx_to_otzaria.dart b/lib/utils/docx_to_otzaria.dart
index dc6daf3e..10c0aee6 100644
--- a/lib/utils/docx_to_otzaria.dart
+++ b/lib/utils/docx_to_otzaria.dart
@@ -5,13 +5,91 @@ import 'dart:convert';
 
 ZipDecoder? _zipDecoder;
 
+/// Processes a run element and returns HTML-formatted text with styling
+String _processRun(xml.XmlElement node, {double defaultFontSize = 12}) {
+  final rPr = node.getElement('w:rPr');
+  final text = node.getElement('w:t')?.innerText ?? '';
+  if (text.isEmpty) return '';
+
+  var result = text;
+
+  if (rPr != null) {
+    // Font size
+    final sz = rPr.getElement('w:sz')?.getAttribute('w:val');
+    if (sz != null) {
+      final fontSize = double.parse(sz) / 2; // Word uses half-points
+      if (fontSize > defaultFontSize) {
+        result = '<big>$result</big>';
+      } else if (fontSize < defaultFontSize) {
+        result = '<small>$result</small>';
+      }
+    }
+
+    // Font color
+    final color = rPr.getElement('w:color')?.getAttribute('w:val');
+    if (color != null) {
+      result = '<span style="color:#$color">$result</span>';
+    }
+
+    // Font family
+    final fontFamily = rPr.getElement('w:rFonts')?.getAttribute('w:ascii') ??
+        rPr.getElement('w:rFonts')?.getAttribute('w:eastAsia');
+    if (fontFamily != null) {
+      result = '<span style="font-family:$fontFamily">$result</span>';
+    }
+
+    // Underline
+    if (rPr.getElement('w:u') != null) {
+      result = '<u>$result</u>';
+    }
+
+    // Italic
+    if (rPr.getElement('w:i') != null) {
+      result = '<i>$result</i>';
+    }
+
+    // Bold
+    if (rPr.getElement('w:b') != null) {
+      result = '<b>$result</b>';
+    }
+  }
+
+  return result;
+}
+
+/// Extracts footnotes from the document
+Map<String, String> _extractFootnotes(Archive archive) {
+  final footnotes = <String, String>{};
+
+  for (final file in archive) {
+    if (file.isFile && file.name == 'word/footnotes.xml') {
+      final content = utf8.decode(file.content);
+      final document = xml.XmlDocument.parse(content);
+
+      final footnoteNodes = document.findAllElements('w:footnote');
+      for (final footnote in footnoteNodes) {
+        final id = footnote.getAttribute('w:id');
+        if (id != null && id != '-1' && id != '0') {
+          // Skip automatic footnotes
+          final text =
+              footnote.findAllElements('w:t').map((e) => e.innerText).join('');
+          footnotes[id] = text;
+        }
+      }
+      break;
+    }
+  }
+
+  return footnotes;
+}
+
 /// Converts a docx file to text.
-/// marks up headings and lists
+/// Marks up headings, lists, text styling, and includes footnotes after their respective paragraphs
 String docxToText(Uint8List bytes, String title) {
   _zipDecoder ??= ZipDecoder();
 
   final archive = _zipDecoder!.decodeBytes(bytes);
-
+  final footnotes = _extractFootnotes(archive);
   final List<String> list = ['<h1>$title</h1>'];
 
   for (final file in archive) {
@@ -20,43 +98,62 @@ String docxToText(Uint8List bytes, String title) {
       final document = xml.XmlDocument.parse(fileContent);
 
       final paragraphNodes = document.findAllElements('w:p');
+      var footnoteCounter = 1;
+      var paragraphFootnotes = <String>[];
 
       for (final paragraph in paragraphNodes) {
         final textNodes = paragraph.findAllElements('w:r');
-        var text = textNodes.map((node) {
-          final innerText = node.getElement('w:t')?.innerText ?? '';
-          //mark bold text
-          if (node.getElement('w:rPr')?.getElement('w:b') != null) {
-            return '<b>$innerText</b>';
+        var text = '';
+        paragraphFootnotes.clear();
+
+        for (final node in textNodes) {
+          // Check for footnote reference
+          final footnoteRef = node.getElement('w:footnoteReference');
+          if (footnoteRef != null) {
+            final footnoteId = footnoteRef.getAttribute('w:id');
+            if (footnoteId != null && footnotes.containsKey(footnoteId)) {
+              text += '<sup>$footnoteCounter</sup>';
+              paragraphFootnotes
+                  .add('$footnoteCounter) ${footnotes[footnoteId]}');
+              footnoteCounter++;
+            }
+          } else {
+            text += _processRun(node);
           }
-          return innerText;
-        }).join();
+        }
 
-        //mark up headings
+        // Process paragraph style
         var style = paragraph
             .getElement('w:pPr')
             ?.getElement('w:pStyle')
             ?.getAttribute('w:val');
-        //if val is a number, that means it is a heading
+
+        // Handle headings
         if (style != null && double.tryParse(style) != null) {
           int styleNum = int.parse(style) + 1;
           text = '<h$styleNum>$text</h$styleNum>';
         }
 
-        //mark up lists
-        //get the numbering level
+        // Handle lists
         var numbering = paragraph.getElement('w:pPr')?.getElement('w:numPr');
         if (numbering != null) {
           String? level = numbering.getElement('w:ilvl')?.getAttribute('w:val');
           if (level != null) {
-            // indent the text with the correct amount of spaces (0 for first level)
             int levelInt = int.parse(level);
             for (int i = 0; i <= levelInt; i++) {
               text = '<ul><li>$text</li></ul>';
             }
           }
         }
-        list.add(text);
+
+        // Add paragraph with its footnotes
+        if (!text.trim().isEmpty) {
+          list.add('$text');
+          if (paragraphFootnotes.isNotEmpty) {
+            list.add(
+                '<div class="footnotes"><small>${paragraphFootnotes.join('<br>')}</small></div>');
+          }
+        }
       }
     }
   }