diff --git a/tv_rename.cpp b/tv_rename.cpp
index 01a6a52..22bab85 100644
--- a/tv_rename.cpp
+++ b/tv_rename.cpp
@@ -45,7 +45,6 @@ constexpr const char_t *dir_divider = "/";
 
 #endif
 
-
 string api_token;
 Request r;
 
@@ -57,11 +56,11 @@ searchShow( const string &show, const string &language ) {
 
     auto encoded_show = encodeUrl( show );
 
-    auto j = json::parse(
-        r.get( TEXT( "/search/series?name=" ) + encoded_show ) );
+    auto j =
+        json::parse( r.get( TEXT( "/search/series?name=" ) + encoded_show ) );
 
     std::vector< json > results;
-    if( j["data"].is_array() ) {
+    if ( j["data"].is_array() ) {
         results = j["data"].get< std::vector< json > >();
     } else {
         cout << toString( j ) << std::endl;
@@ -85,14 +84,14 @@ searchShow( const string &show, const string &language ) {
 string getShowId( string &show, const string &language ) {
     size_t order{}, pos{};
     auto search_results = searchShow( show, language );
-    for( const auto &x : search_results ) {
+    for ( const auto &x : search_results ) {
         cout << ++order << ". " << x.first << std::endl;
     }
     cout << "Which TV Show is the right one? " << std::flush;
     cin >> pos;
     cin.clear();
     cin.ignore( 1, '\n' );
-    return search_results[pos-1].second;
+    return search_results[pos - 1].second;
 }
 #endif
 
@@ -104,65 +103,72 @@ string showNameFromId( const string &id, const string &language ) {
     auto j = json::parse( r.get( TEXT( "/series/" ) + id ) );
 
     // TODO check if got json
-    std::string show = j["data"].get< json >()["seriesName"].get< std::string >();
+    std::string show =
+        j["data"].get< json >()["seriesName"].get< std::string >();
     return toString( show );
 }
 
 // get names for all episodes for a given season
 std::vector< string > getEpisodeNames( const string &id, const string &season,
-                                       const string &language, bool dvd = false ) {
+                                       const string &language,
+                                       bool dvd = false ) {
     r.addHeader( TEXT( "Accept: application/json" ) );
     r.addHeader( TEXT( "Authorization: Bearer " ) + api_token );
     r.addHeader( TEXT( "Accept-Language: " ) + language );
     string page = TEXT( "1" );
     string season_query = TEXT( "airedSeason=" );
-    if( dvd )
+    if ( dvd )
         season_query = TEXT( "dvdSeason=" );
     std::vector< string > episodes;
     do {
         episodes.resize( episodes.size() * 2 );
         auto j = json::parse( r.get( TEXT( "/series/" ) + id +
-                                     TEXT( "/episodes/query?" ) + season_query + season
-                                     + TEXT( "&page=" ) + page ) );
-        if( j["data"].is_array() ) {
+                                     TEXT( "/episodes/query?" ) + season_query +
+                                     season + TEXT( "&page=" ) + page ) );
+        if ( j["data"].is_array() ) {
             auto epdata = j["data"].get< std::vector< json > >();
-            if( episodes.size() < epdata.size() )
+            if ( episodes.size() < epdata.size() )
                 episodes.resize( epdata.size() );
             for ( auto &x : epdata ) {
-                if( x["episodeName"].is_string() ) {
-                    if( dvd ) {
+                if ( x["episodeName"].is_string() ) {
+                    if ( dvd ) {
                         size_t index = x["dvdEpisodeNumber"].get< size_t >();
-                        if( index > episodes.size() )
+                        if ( index > episodes.size() )
                             episodes.resize( index );
                         index--;
-                        episodes[index] = toString( x["episodeName"].get< std::string >() );
+                        episodes[index] =
+                            toString( x["episodeName"].get< std::string >() );
                     } else {
                         size_t index = x["airedEpisodeNumber"].get< size_t >();
-                        if( index > episodes.size() )
+                        if ( index > episodes.size() )
                             episodes.resize( index );
                         index--;
-                        episodes[index] = toString( x["episodeName"].get< std::string >() );
+                        episodes[index] =
+                            toString( x["episodeName"].get< std::string >() );
                         // some eps have whitespace at the end
-                        while( isspace( episodes[index].back() ) )
+                        while ( isspace( episodes[index].back() ) )
                             episodes[index].pop_back();
                     }
                 }
             }
         } else {
-            cerr << "Couldn't find episode names for season " << season << " of show " << showNameFromId( id, language ) << std::endl;
+            cerr << "Couldn't find episode names for season " << season
+                 << " of show " << showNameFromId( id, language ) << std::endl;
         }
-        if( j["links"]["next"].is_null() )
+        if ( j["links"]["next"].is_null() )
             break;
         page = toString( std::to_string( j["links"]["next"].get< size_t >() ) );
-    } while( 1 );
+    } while ( 1 );
     r.clearHeader();
     return episodes;
 }
 
-std::vector< std::pair< std::pair< int, string >, std::pair< string, string > > >
+std::vector<
+    std::pair< std::pair< int, string >, std::pair< string, string > > >
 getRenamedFiles( const string &show, int season, const string id,
                  const string &language, const string &pattern,
-                 const bool &linux, const std::map< int, string > &files, bool dvd ) {
+                 const bool &linux, const std::map< int, string > &files,
+                 bool dvd ) {
     auto season_num = toString( std::to_string( season ) );
     auto episodes = getEpisodeNames( id, season_num, language, dvd );
 
@@ -172,7 +178,8 @@ getRenamedFiles( const string &show, int season, const string id,
     if ( files.empty() )
         return {};
 
-    std::vector< std::pair< std::pair< int, string >, std::pair< string, string > > >
+    std::vector<
+        std::pair< std::pair< int, string >, std::pair< string, string > > >
         renamed_files;
 
     for ( const auto &x : files ) {
@@ -192,8 +199,8 @@ getRenamedFiles( const string &show, int season, const string id,
             auto pos = og_name.find_last_of( TEXT( "." ) );
             // get desired filename
             auto name = compilePattern( pattern, season, x.first,
-                                        og_name.substr( 0, pos ), episodes[ep_num],
-                                        show ) +
+                                        og_name.substr( 0, pos ),
+                                        episodes[ep_num], show ) +
                         og_name.substr( pos );
             // replace '/' with '|'
             for ( size_t i = 0; i < name.size(); i++ ) {
@@ -236,7 +243,8 @@ getRenamedFiles( const string &show, int season, const string id,
                 }
             }
             renamed_files.emplace_back(
-                std::pair< int, string >( x.first, dir ), std::pair< string, string >( og_name, name ) );
+                std::pair< int, string >( x.first, dir ),
+                std::pair< string, string >( og_name, name ) );
         }
     }
     return renamed_files;
@@ -264,8 +272,8 @@ bool authenticate( const std::string &api_key ) {
 #endif
     r.addHeader( TEXT( "Accept: application/json" ) );
     r.addHeader( TEXT( "Content-Type: application/json" ) );
-    auto j = json::parse( r.post( TEXT( "/login" ),
-                                  "{ \"apikey\": \"" + api_key + "\" }" ) );
+    auto j = json::parse(
+        r.post( TEXT( "/login" ), "{ \"apikey\": \"" + api_key + "\" }" ) );
     api_token = toString( j["token"].get< std::string >() );
     r.clearHeader();
     // TODO check return code
@@ -286,11 +294,11 @@ void singleSeason( const string &path, string &show, int season, string id,
     if ( files_ptr == nullptr ) {
         found_files = new std::map< int, std::map< int, string > >;
         iterateFS( *found_files, path );
-        if( found_files->find( season ) != found_files->end() )
-            files_ptr = &(*found_files)[season];
+        if ( found_files->find( season ) != found_files->end() )
+            files_ptr = &( *found_files )[season];
     }
 
-    if( files_ptr == nullptr ) {
+    if ( files_ptr == nullptr ) {
         cerr << "Couldn't find episodes with season " << season << std::endl;
         return;
     }
@@ -298,9 +306,9 @@ void singleSeason( const string &path, string &show, int season, string id,
     auto renamed_files = getRenamedFiles( show, season, id, language, pattern,
                                           linux, *files_ptr, dvd );
 
-    if( print || !trust ) {
-        for ( auto renamed = renamed_files.begin(); renamed != renamed_files.end();
-              ++renamed ) {
+    if ( print || !trust ) {
+        for ( auto renamed = renamed_files.begin();
+              renamed != renamed_files.end(); ++renamed ) {
             cout << renamed->second.first << " --> " << renamed->second.second
                  << std::endl;
         }
@@ -318,10 +326,12 @@ void singleSeason( const string &path, string &show, int season, string id,
 
     for ( auto renamed = renamed_files.begin(); renamed != renamed_files.end();
           ++renamed ) {
-        FSLib::rename( renamed->first.second + dir_divider + renamed->second.first,
-                       renamed->first.second + dir_divider + renamed->second.second );
-        if( found_files == nullptr ) {
-            files_ptr[0][renamed->first.first] = renamed->first.second + dir_divider + renamed->second.second;
+        FSLib::rename(
+            renamed->first.second + dir_divider + renamed->second.first,
+            renamed->first.second + dir_divider + renamed->second.second );
+        if ( found_files == nullptr ) {
+            files_ptr[0][renamed->first.first] =
+                renamed->first.second + dir_divider + renamed->second.second;
         }
     }
 
@@ -346,10 +356,11 @@ void multipleSeasons( const string &path, string &show,
     std::map< int, std::map< int, string > > season_map;
     iterateFS( season_map, path );
     auto id = getShowId( show, language );
-    for( auto &x : season_map ) {
-        if( seasons.find( x.first ) != seasons.end() ) {
-            singleSeason( path, show, x.first, id, language, pattern, flags & TV_LINUX, flags & TV_TRUST,
-                          &x.second, flags & TV_DVD );
+    for ( auto &x : season_map ) {
+        if ( seasons.find( x.first ) != seasons.end() ) {
+            singleSeason( path, show, x.first, id, language, pattern,
+                          flags & TV_LINUX, flags & TV_TRUST, &x.second,
+                          flags & TV_DVD );
         }
     }
 }
@@ -360,9 +371,10 @@ void allSeasons( const string &path, string &show, const string &language,
     // get all season number from this directory and subdirectories
     iterateFS( seasons, path );
     auto id = getShowId( show, language );
-    for( auto &x : seasons ) {
-        singleSeason( path, show, x.first, id, language, pattern, flags & TV_LINUX, flags & TV_TRUST,
-                      &x.second, flags & TV_DVD );
+    for ( auto &x : seasons ) {
+        singleSeason( path, show, x.first, id, language, pattern,
+                      flags & TV_LINUX, flags & TV_TRUST, &x.second,
+                      flags & TV_DVD );
     }
 }
 
@@ -371,6 +383,8 @@ void printLangs() {
         cout << x.first << " - " << x.second << std::endl;
 }
 
+#endif
+
 bool findLanguage( const char_t *language ) {
     for ( auto &x : getLangs() ) {
         if ( x.first == language )
@@ -379,4 +393,11 @@ bool findLanguage( const char_t *language ) {
     return false;
 }
 
-#endif
+bool validID( const string &id ) {
+    r.addHeader( TEXT( "Accept: application/json" ) );
+    r.addHeader( TEXT( "Authorization: Bearer " ) + api_token );
+
+    r.get( TEXT( "/series/" ) + id );
+
+    return r.lastResponseCode() == 200;
+}
diff --git a/tv_rename.hpp b/tv_rename.hpp
index 9846024..927bd72 100644
--- a/tv_rename.hpp
+++ b/tv_rename.hpp
@@ -33,15 +33,18 @@ void singleSeason( const string &path, string &show, int season, string id,
 
 void singleSeason( const string &path, string &show, int season, string id,
                    const string &language, const string &pattern,
-                   const size_t &flags, std::map< int, string > *files_ptr = nullptr,
+                   const size_t &flags,
+                   std::map< int, string > *files_ptr = nullptr,
                    bool print = true );
 
 #ifdef GUI
 
-std::vector< std::pair< std::pair< int, string >, std::pair< string, string > > >
+std::vector<
+    std::pair< std::pair< int, string >, std::pair< string, string > > >
 getRenamedFiles( const string &show, int season, const string id,
                  const string &language, const string &pattern,
-                 const bool &linux, const std::map< int, string > &files, bool dvd = false );
+                 const bool &linux, const std::map< int, string > &files,
+                 bool dvd = false );
 
 std::vector< std::pair< string, string > > getLangs();
 
@@ -62,6 +65,8 @@ void printLangs();
 
 bool findLanguage( const char_t *language );
 
+bool validID( const string &id );
+
 bool authenticate( const std::string &api_key );
 
 string showNameFromId( const string &id, const string &language );