Add mappings for languages not given by libicu

Adds a std::map<std::string, std::string> with display names for language codes not given by libicu
Fault language codes are taken from library.kiwix.org

src/opds_dumper.cpp

@@ -126,13 +126,62 @@ BooksData getBooksData(const Library* library, const std::vector<std::string>& b
   return booksData;
 }
 
+std::map<std::string, std::string> iso639_3 = {
+  {"atj","atikamekw"},
+  {"azb","آذربایجان دیلی"},
+  {"bcl","central bikol"},
+  {"bgs","tagabawa"},
+  {"bxr","буряад хэлэн"},
+  {"cbk","chavacano"},
+  {"cdo","閩東語"},
+  {"diq","dimli"},
+  {"dty","डोटेली"},
+  {"eml","emiliân-rumagnōl"},
+  {"fbs","српскохрватски"},
+  {"kbp","kabɩyɛ"},
+  {"kld","Gamilaraay"},
+  {"lbe","лакку маз"},
+  {"lbj","ལ་དྭགས་སྐད་"},
+  {"map","Austronesian"},
+  {"mhr","марий йылме"},
+  {"mnw","ဘာသာမန်"},
+  {"myn","mayan"},
+  {"nah","nahuatl"},
+  {"nai","north American Indian"},
+  {"nds","plattdütsch"},
+  {"nrm","bhasa narom"},
+  {"olo","livvi"},
+  {"pih","Pitcairn-Norfolk"},
+  {"pnb","Western Panjabi"},
+  {"rmr","Caló"},
+  {"rmy","romani shib"},
+  {"roa","romance languages"},
+  {"twi","twi"},
+  {"ido","ido"}
+};
+
+std::once_flag fillLanguagesFlag;
+
+void fillLanguagesMap() 
+{
+  for (auto icuLangPtr = icu::Locale::getISOLanguages(); *icuLangPtr != NULL; ++icuLangPtr) {
+    auto lang = *icuLangPtr;
+    const icu::Locale locale(lang);
+    icu::UnicodeString ustring;
+    locale.getDisplayLanguage(locale, ustring);
+    std::string displayLanguage;
+    ustring.toUTF8String(displayLanguage);
+    std::string iso3LangCode = locale.getISO3Language();
+    iso639_3.insert({iso3LangCode, displayLanguage});
+  }
+}
+
 std::string getLanguageSelfName(const std::string& lang) {
-  const icu::Locale locale(lang.c_str());
-  icu::UnicodeString ustring;
-  locale.getDisplayLanguage(locale, ustring);
-  std::string result;
-  ustring.toUTF8String(result);
-  return result;
+  const auto itr = iso639_3.find(lang);
+  if (itr != iso639_3.end()) {
+    return itr->second;
+  }
+  return lang;
 };
 
 } // unnamed namespace
@@ -210,6 +259,7 @@ std::string OPDSDumper::languagesOPDSFeed() const
 {
   const auto now = gen_date_str();
   kainjow::mustache::list languageData;
+  std::call_once(fillLanguagesFlag, fillLanguagesMap);
   for ( const auto& langAndBookCount : library->getBooksLanguagesWithCounts() ) {
     const std::string languageCode = langAndBookCount.first;
     const int bookCount = langAndBookCount.second;

src/server/internalServer.cpp

@@ -146,7 +146,6 @@ bool InternalServer::start() {
   if (m_verbose.load())
     flags |= MHD_USE_DEBUG;
 
-
   struct sockaddr_in sockAddr;
   memset(&sockAddr, 0, sizeof(sockAddr));
   sockAddr.sin_family = AF_INET;