Add random_exclude_pattern option for random songs

doc/config

@@ -34,6 +34,10 @@
 #
 #mpd_crossfade_time = 5
 #
+# Exclude pattern for random song action
+# http://www.boost.org/doc/libs/1_46_1/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html
+#random_exclude_pattern = "^(temp|midi_songs).*"
+#
 ##### music visualizer #####
 ##
 ## Note: In order to make music visualizer work you'll need to use mpd fifo

src/actions.cpp

@@ -2208,7 +2208,7 @@ void AddRandomItems::run()
 	{
 		bool success;
 		if (rnd_type == 's')
-			success = Mpd.AddRandomSongs(number, Global::RNG);
+			success = Mpd.AddRandomSongs(number, Config.random_exclude_pattern, Global::RNG);
 		else
 			success = Mpd.AddRandomTag(tag_type, number, Global::RNG);
 		if (success)

src/mpdpp.cpp

@@ -22,6 +22,7 @@
 #include <cstdlib>
 #include <algorithm>
 #include <map>
+#include <boost/regex.hpp>
 
 #include "charset.h"
 #include "mpdpp.h"
@@ -601,7 +602,7 @@ bool Connection::AddRandomTag(mpd_tag_type tag, size_t number, std::mt19937 &rng
 	return true;
 }
 
-bool Connection::AddRandomSongs(size_t number, std::mt19937 &rng)
+bool Connection::AddRandomSongs(size_t number, std::string random_exclude_pattern, std::mt19937 &rng)
 {
 	prechecksNoCommandsList();
 	std::vector<std::string> files;
@@ -625,8 +626,13 @@ bool Connection::AddRandomSongs(size_t number, std::mt19937 &rng)
 		std::shuffle(files.begin(), files.end(), rng);
 		StartCommandsList();
 		auto it = files.begin();
-		for (size_t i = 0; i < number && it != files.end(); ++i, ++it)
-			AddSong(*it);
+		boost::regex re(random_exclude_pattern);
+		for (size_t i = 0; i < number && it != files.end(); ++it) {
+			if (random_exclude_pattern.empty() || !boost::regex_match((*it), re)) {
+				AddSong(*it);
+				i++;
+			}
+		}
 		CommitCommandsList();
 	}
 	return true;

src/mpdpp.h

@@ -546,7 +546,7 @@ struct Connection
 	int AddSong(const std::string &, int = -1); // returns id of added song
 	int AddSong(const Song &, int = -1); // returns id of added song
 	bool AddRandomTag(mpd_tag_type, size_t, std::mt19937 &rng);
-	bool AddRandomSongs(size_t number, std::mt19937 &rng);
+	bool AddRandomSongs(size_t number, std::string random_exclude_pattern, std::mt19937 &rng);
 	void Add(const std::string &path);
 	void Delete(unsigned int pos);
 	void PlaylistDelete(const std::string &playlist, unsigned int pos);

src/settings.cpp

@@ -275,6 +275,7 @@ bool Configuration::read(const std::vector<std::string> &config_paths, bool igno
 	p.add("mpd_music_dir", &mpd_music_dir, "~/music", adjust_directory);
 	p.add("mpd_connection_timeout", &mpd_connection_timeout, "5");
 	p.add("mpd_crossfade_time", &crossfade_time, "5");
+	p.add("random_exclude_pattern", &random_exclude_pattern, "");
 	p.add("visualizer_fifo_path", &visualizer_fifo_path, "/tmp/mpd.fifo", adjust_path);
 	p.add("visualizer_output_name", &visualizer_output_name, "Visualizer feed");
 	p.add("visualizer_in_stereo", &visualizer_in_stereo, "yes", yes_no);

src/settings.h

@@ -178,6 +178,7 @@ struct Configuration
 
 	unsigned mpd_connection_timeout;
 	unsigned crossfade_time;
+	std::string random_exclude_pattern;
 	unsigned seek_time;
 	unsigned volume_change_step;
 	unsigned message_delay_time;