File-not-found tab now displays zim name and path

Zim name and path is displayed to helped user to work out what to do with the tab.

resources/i18n/en.json

@@ -171,5 +171,7 @@
     "preview-book-in-web-browser": "Preview book in web browser",
     "file-not-found-title": "ZIM File Not Found",
     "file-not-found-text": "ZIM file doesn't exist or is not readable",
-    "zim-id": "ZIM Id"
+    "zim-id": "Zim Id",
+    "zim-name": "Zim Name",
+    "zim-path": "Zim File Path"
 }

resources/i18n/qqq.json

@@ -178,5 +178,7 @@
 	"path-was-copied": "Tooltip confirming that the download path from settings was copied.",
 	"file-not-found-title": "Error title text displayed when the desktop application cannot find the Zim file needed to display the web page.",
 	"file-not-found-text": "Error description text for when the desktop application cannot find the Zim file needed to display the web page.",
-	"zim-id": "The term for the unique identifier of a zim file."
+	"zim-id": "The term for the unique identifier of a zim file.",
+	"zim-name": "The term for the name of a Zim file",
+	"zim-path": "The term for the path of a Zim file"
 }

src/contentmanager.cpp

@@ -906,5 +906,6 @@ void ContentManager::updateLibraryFromDir(QString monitorDir)
 
 void ContentManager::handleDisappearedZimFile(QString bookId)
 {
-    mp_library->removeBookFromLibraryById(bookId);
+    if (!KiwixApp::instance()->getTabWidget()->getTabZimIds().contains(bookId))
+        mp_library->removeBookFromLibraryById(bookId);
 }

src/kiwixapp.cpp

@@ -106,10 +106,10 @@ void KiwixApp::init()
         mp_manager->asyncUpdateLibraryFromDir(monitorDir);
     });
 
-    setupDirectoryMonitoring();
-
+    /* Restore Tabs before directory monitoring to ensure we know what tabs user had. */
     restoreTabs();
     restoreWindowState();
+    setupDirectoryMonitoring();
 }
 
 void KiwixApp::setupDirectoryMonitoring()

src/tabbar.cpp

@@ -282,6 +282,15 @@ QStringList TabBar::getTabUrls() const {
     return idList;
 }
 
+QStringList TabBar::getTabZimIds() const
+{ 
+    QStringList idList;
+    for (int index = 0; index <= mp_stackedWidget->count(); index++)
+        if (ZimView* zv = qobject_cast<ZimView*>(mp_stackedWidget->widget(index)))
+            idList.push_back(zv->getWebView()->zimId());
+    return idList;
+}
+
 void TabBar::closeTab(int index)
 {
     // The first and last tabs (i.e. the library tab and the + (new tab) button)

src/tabbar.h

@@ -50,6 +50,7 @@ class TabBar : public QTabBar
     void openFindInPageBar();
     void closeTabsByZimId(const QString &id);
     QStringList getTabUrls() const;
+    QStringList getTabZimIds() const;
 
 protected:
     void mousePressEvent(QMouseEvent *event);

src/urlschemehandler.cpp

@@ -181,6 +181,15 @@ UrlSchemeHandler::replyZimNotFoundPage(QWebEngineUrlRequestJob *request,
                                        const QString &zimId)
 {
     QBuffer *buffer = new QBuffer;
+    QString path = "N/A", name = "N/A";
+    try 
+    {
+        auto& book = KiwixApp::instance()->getLibrary()->getBookById(zimId);
+        path = QString::fromStdString(book.getPath());
+        name = QString::fromStdString(book.getName());
+    }
+    catch (...) { /* Blank */ }
+
     QString contentHtml = "<section><div>"
                           "<h1>" +
                           gt("file-not-found-title") +
@@ -191,6 +200,12 @@ UrlSchemeHandler::replyZimNotFoundPage(QWebEngineUrlRequestJob *request,
                           "<p>" +
                           gt("zim-id") + ": <b>" + zimId +
                           "</b></p>"
+                          "<p>" +
+                          gt("zim-name") + ": <b>" + name +
+                          "</b></p>"
+                          "<p>" +
+                          gt("zim-path") + ": <b>" + path +
+                          "</b></p>"
                           "</div></section>";
 
     buffer->open(QIODevice::WriteOnly);