Introduced withTaskbarInfo() helper function

This was done in preparation for removing the `bookName` and `bookTitle`
parameters from `Response::build_404()`, but since the new function
could already be put to some use in this commit that was done too.

src/server/internalServer.cpp

@@ -519,9 +519,8 @@ std::unique_ptr<Response> InternalServer::handle_search(const RequestContext& re
     data.set("pattern", encodeDiples(patternString));
     data.set("root", m_root);
     auto response = ContentResponse::build(*this, RESOURCE::templates::no_search_result_html, data, "text/html; charset=utf-8");
-    response->set_taskbar(bookName, archive ? getArchiveTitle(*archive) : "");
     response->set_code(MHD_HTTP_NOT_FOUND);
-    return std::move(response);
+    return withTaskbarInfo(bookName, archive.get(), std::move(response));
   }
 
   std::shared_ptr<zim::Searcher> searcher;
@@ -591,9 +590,7 @@ std::unique_ptr<Response> InternalServer::handle_search(const RequestContext& re
     renderer.setSearchProtocolPrefix(m_root + "/search?");
     renderer.setPageLength(pageLength);
     auto response = ContentResponse::build(*this, renderer.getHtml(), "text/html; charset=utf-8");
-    response->set_taskbar(bookName, archive ? getArchiveTitle(*archive) : "");
-
-    return std::move(response);
+    return withTaskbarInfo(bookName, archive.get(), std::move(response));
   } catch (const std::exception& e) {
     std::cerr << e.what() << std::endl;
     return Response::build_500(*this, e.what());

src/server/response.cpp

@@ -25,6 +25,7 @@
 #include "tools/regexTools.h"
 #include "tools/stringTools.h"
 #include "tools/otherTools.h"
+#include "tools/archiveTools.h"
 
 #include "string.h"
 #include <mustache.hpp>
@@ -383,6 +384,15 @@ std::unique_ptr<ContentResponse> ContentResponse::build(
   return ContentResponse::build(server, content, mimetype, isHomePage);
 }
 
+std::unique_ptr<ContentResponse> withTaskbarInfo(
+  const std::string& bookName,
+  const zim::Archive* archive,
+  std::unique_ptr<ContentResponse> r)
+{
+  r->set_taskbar(bookName, archive ? getArchiveTitle(*archive) : "");
+  return r;
+}
+
 ItemResponse::ItemResponse(bool verbose, const zim::Item& item, const std::string& mimetype, const ByteRange& byterange) :
   Response(verbose),
   m_item(item),

src/server/response.h

@@ -33,6 +33,10 @@ extern "C" {
 #include "microhttpd_wrapper.h"
 }
 
+namespace zim {
+class Archive;
+} // namespace zim
+
 namespace kiwix {
 
 class InternalServer;
@@ -124,6 +128,10 @@ class ContentResponse : public Response {
     std::string m_bookTitle;
  };
 
+std::unique_ptr<ContentResponse> withTaskbarInfo(const std::string& bookName,
+                                                 const zim::Archive* archive,
+                                                 std::unique_ptr<ContentResponse> r);
+
 class ItemResponse : public Response {
   public:
     ItemResponse(bool verbose, const zim::Item& item, const std::string& mimetype, const ByteRange& byterange);