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NavigationItem.Link.ContentFileName is returning incorrectly

See original GitHub issue

Description

The library is returning the wrong text for ContentFileName. In the case for this epub, it should return “Text/chapter01.xhtml” while it is returning “Text/…/Text/chapter01.xhml”. I’m not sure where the extra relative path is coming from, given it’s not in the XML.

Epub structure:

Code:

var navItems = await book.GetNavigationAsync();
foreach (var navigationItem in navItems)
            {
                if (navigationItem.NestedItems.Count > 0)
                {
                   var nestedChapters = new List<BookChapterItem>();

                    foreach (var nestedChapter in navigationItem.NestedItems)
                    {
                        if (nestedChapter.Link == null) continue;

                        // BUG: nestedChapter.Link.ContentFileName -> Is returning "/Text/../Text/chapter01.xhtml" when it should be "Text/chapter01.xhtml"
                        var key = BookService.CleanContentKeys(nestedChapter.Link.ContentFileName);
                        if (mappings.ContainsKey(key))
                        {
                            nestedChapters.Add(new BookChapterItem()
                            {
                                Title = nestedChapter.Title,
                                Page = mappings[key],
                                Part = nestedChapter.Link.Anchor ?? string.Empty,
                                Children = new List<BookChapterItem>()
                            });
                        }
                    }

                    CreateToCChapter(navigationItem, nestedChapters, chaptersList, mappings);
                }

Toc.ncx:

<navPoint id="navPoint5">
      <navLabel>
        <text>Day 0: Backstory and the Bridal Wars</text>
      </navLabel>
      <content src="Text/chapter1.xhtml"/>
    </navPoint>
    <navPoint id="navPoint6">
      <navLabel>
        <text>Day 1, Morning: The Start of a Slow Life</text>
      </navLabel>
      <content src="Text/chapter2.xhtml"/>
    </navPoint>

Manifest:

<manifest>
    <item id="cover" href="Text/cover.xhtml" media-type="application/xhtml+xml"/>
    <item id="frontmatter1.xhtml" href="Text/frontmatter1.xhtml" media-type="application/xhtml+xml"/>
    <item id="frontmatter2.xhtml" href="Text/frontmatter2.xhtml" media-type="application/xhtml+xml"/>
    <item id="toc.xhtml" href="Text/toc.xhtml" media-type="application/xhtml+xml" properties="nav"/>
    <item id="prologue.xhtml" href="Text/prologue.xhtml" media-type="application/xhtml+xml"/>
    <item id="prologue2.xhtml" href="Text/prologue2.xhtml" media-type="application/xhtml+xml"/>
    <item id="insert1.xhtml" href="Text/insert1.xhtml" media-type="application/xhtml+xml"/>
    <item id="prologue2_1.xhtml" href="Text/prologue2_1.xhtml" media-type="application/xhtml+xml"/>
    <item id="chapter1.xhtml" href="Text/chapter1.xhtml" media-type="application/xhtml+xml"/>
    ...