Support Epub chapters that are split accross multiple files (ScerIO#27)

* Support split epub chapters * Fix merge issues * Formatting fix
synthex2020 · Oct 22, 2024 · b35e5d1 · b35e5d1
1 parent 7afea4a
commit b35e5d1
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Showing 3 changed files with 36 additions and 1 deletion.
diff --git a/lib/src/entities/epub_chapter.dart b/lib/src/entities/epub_chapter.dart
@@ -7,12 +7,14 @@ class EpubChapter {
   String? Anchor;
   String? HtmlContent;
   List<EpubChapter>? SubChapters;
+  List<String> OtherContentFileNames = [];
 
   @override
   int get hashCode {
     var objects = [
       Title.hashCode,
       ContentFileName.hashCode,
+      OtherContentFileNames.hashCode,
       Anchor.hashCode,
       HtmlContent.hashCode,
       ...SubChapters?.map((subChapter) => subChapter.hashCode) ?? [0],
@@ -27,6 +29,7 @@ class EpubChapter {
     }
     return Title == other.Title &&
         ContentFileName == other.ContentFileName &&
+        OtherContentFileNames == other.OtherContentFileNames &&
         Anchor == other.Anchor &&
         HtmlContent == other.HtmlContent &&
         collections.listsEqual(SubChapters, other.SubChapters);

diff --git a/lib/src/readers/chapter_reader.dart b/lib/src/readers/chapter_reader.dart
@@ -45,6 +45,18 @@ class ChapterReader {
       chapterRef.Title = navigationPoint.NavigationLabels!.first.Text;
       chapterRef.SubChapters =
           getChaptersImpl(bookRef, navigationPoint.ChildNavigationPoints!);
+      if(chapterRef.ContentFileName!.contains('_split_')) {
+        var fileNamePart = chapterRef.ContentFileName!.split('_split_')[0];
+        for (var fileName in bookRef.Content!.Html!.keys) {
+          if(fileName.contains(fileNamePart)) {
+            if (fileName == contentFileName) {
+              continue;
+            }
+            chapterRef.otherTextContentFileRefs.add(bookRef.Content!.Html![fileName]!);
+            chapterRef.OtherContentFileNames.add(fileName);
+          }
+        }
+      }
 
       result.add(chapterRef);
     };

diff --git a/lib/src/ref_entities/epub_chapter_ref.dart b/lib/src/ref_entities/epub_chapter_ref.dart
@@ -6,12 +6,17 @@ import 'package:quiver/core.dart';
 import 'epub_text_content_file_ref.dart';
 
 class EpubChapterRef {
+  // Referece to Text content reader.
   EpubTextContentFileRef? epubTextContentFileRef;
+  // If the chapter is split into multiple files, this list contains the references to content readers of the other files.
+  List<EpubTextContentFileRef> otherTextContentFileRefs = [];
 
   String? Title;
   String? ContentFileName;
   String? Anchor;
   List<EpubChapterRef>? SubChapters;
+  // If the chapter is split into multiple files, this list contains the names of the other files.
+  List<String> OtherContentFileNames = [];
 
   EpubChapterRef(EpubTextContentFileRef? epubTextContentFileRef) {
     this.epubTextContentFileRef = epubTextContentFileRef;
@@ -22,8 +27,10 @@ class EpubChapterRef {
     var objects = [
       Title.hashCode,
       ContentFileName.hashCode,
+      OtherContentFileNames.hashCode,
       Anchor.hashCode,
       epubTextContentFileRef.hashCode,
+      otherTextContentFileRefs.hashCode,
       ...SubChapters?.map((subChapter) => subChapter.hashCode) ?? [0],
     ];
     return hashObjects(objects);
@@ -36,13 +43,26 @@ class EpubChapterRef {
     }
     return Title == other.Title &&
         ContentFileName == other.ContentFileName &&
+        OtherContentFileNames == other.OtherContentFileNames &&
         Anchor == other.Anchor &&
         epubTextContentFileRef == other.epubTextContentFileRef &&
+        otherTextContentFileRefs == other.otherTextContentFileRefs &&
         collections.listsEqual(SubChapters, other.SubChapters);
   }
 
   Future<String> readHtmlContent() async {
-    return epubTextContentFileRef!.readContentAsText();
+    var contentFuture = epubTextContentFileRef!.readContentAsText();
+    if (OtherContentFileNames.isNotEmpty) {
+      var allContentFutures = <Future<String>>[contentFuture];
+      for (var otherContentFileRef in otherTextContentFileRefs) {
+        allContentFutures.add(otherContentFileRef.readContentAsText());
+      }
+      return Future.wait(allContentFutures).then((List<String> contents) {
+        return contents.join('');
+      });
+    } else {
+      return contentFuture;
+    }
   }
 
   @override