db_print: convert to C++

1 files changed, 330 insertions, 0 deletions

diff --git a/src/DatabasePrint.cxx b/src/DatabasePrint.cxx
new file mode 100644
index 00000000..d790eb5b
--- /dev/null
+++ b/src/DatabasePrint.cxx
@@ -0,0 +1,330 @@
+/*
+ * Copyright (C) 2003-2012 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+extern "C" {
+#include "db_print.h"
+#include "db_selection.h"
+#include "locate.h"
+#include "database.h"
+#include "client.h"
+#include "song.h"
+#include "song_print.h"
+#include "playlist_vector.h"
+#include "tag.h"
+}
+
+#include "directory.h"
+
+#include "DatabaseGlue.hxx"
+#include "DatabasePlugin.hxx"
+
+#include <functional>
+#include <set>
+
+static bool
+PrintDirectory(struct client *client, const struct directory *directory)
+{
+	if (!directory_is_root(directory))
+		client_printf(client, "directory: %s\n", directory_get_path(directory));
+
+	return true;
+}
+
+static void
+print_playlist_in_directory(struct client *client,
+			    const struct directory *directory,
+			    const char *name_utf8)
+{
+	if (directory_is_root(directory))
+		client_printf(client, "playlist: %s\n", name_utf8);
+	else
+		client_printf(client, "playlist: %s/%s\n",
+			      directory_get_path(directory), name_utf8);
+}
+
+static bool
+PrintSongBrief(struct client *client, struct song *song)
+{
+	assert(song != NULL);
+	assert(song->parent != NULL);
+
+	song_print_uri(client, song);
+
+	if (song->tag != NULL && song->tag->has_playlist)
+		/* this song file has an embedded CUE sheet */
+		print_playlist_in_directory(client, song->parent,
+					    song->uri);
+
+	return true;
+}
+
+static bool
+PrintSongFull(struct client *client, struct song *song)
+{
+	assert(song != NULL);
+	assert(song->parent != NULL);
+
+	song_print_info(client, song);
+
+	if (song->tag != NULL && song->tag->has_playlist)
+		/* this song file has an embedded CUE sheet */
+		print_playlist_in_directory(client, song->parent,
+					    song->uri);
+
+	return true;
+}
+
+static bool
+PrintPlaylistBrief(struct client *client,
+		   const struct playlist_metadata *playlist,
+		   const struct directory *directory)
+{
+	print_playlist_in_directory(client, directory, playlist->name);
+	return true;
+}
+
+static bool
+PrintPlaylistFull(struct client *client,
+		  const struct playlist_metadata *playlist,
+		  const struct directory *directory)
+{
+	print_playlist_in_directory(client, directory, playlist->name);
+
+#ifndef G_OS_WIN32
+	struct tm tm;
+#endif
+	char timestamp[32];
+	time_t t = playlist->mtime;
+	strftime(timestamp, sizeof(timestamp),
+#ifdef G_OS_WIN32
+		 "%Y-%m-%dT%H:%M:%SZ",
+		 gmtime(&t)
+#else
+		 "%FT%TZ",
+		 gmtime_r(&t, &tm)
+#endif
+		 );
+	client_printf(client, "Last-Modified: %s\n", timestamp);
+
+	return true;
+}
+
+bool
+db_selection_print(struct client *client, const struct db_selection *selection,
+		   bool full, GError **error_r)
+{
+	using namespace std::placeholders;
+	const auto d = std::bind(PrintDirectory, client, _1);
+	const auto s = std::bind(full ? PrintSongFull : PrintSongBrief,
+				 client, _1);
+	const auto p = std::bind(full ? PrintPlaylistFull : PrintPlaylistBrief,
+				 client, _1, _2);
+
+	return GetDatabase()->Visit(selection, d, s, p, error_r);
+}
+
+static bool
+SearchPrintSong(struct client *client, const struct locate_item_list *criteria,
+		struct song *song)
+{
+	if (locate_song_search(song, criteria))
+		song_print_info(client, song);
+
+	return true;
+}
+
+bool
+searchForSongsIn(struct client *client, const char *uri,
+		 const struct locate_item_list *criteria,
+		 GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, uri, true);
+
+	struct locate_item_list *new_list
+		= locate_item_list_casefold(criteria);
+
+	using namespace std::placeholders;
+	const auto f = std::bind(SearchPrintSong, client, new_list, _1);
+	bool success = GetDatabase()->Visit(&selection, f, error_r);
+
+	locate_item_list_free(new_list);
+
+	return success;
+}
+
+static bool
+MatchPrintSong(struct client *client, const struct locate_item_list *criteria,
+	       struct song *song)
+{
+	if (locate_song_match(song, criteria))
+		song_print_info(client, song);
+
+	return true;
+}
+
+bool
+findSongsIn(struct client *client, const char *uri,
+	    const struct locate_item_list *criteria,
+	    GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, uri, true);
+
+	using namespace std::placeholders;
+	const auto f = std::bind(MatchPrintSong, client, criteria, _1);
+	return GetDatabase()->Visit(&selection, f, error_r);
+}
+
+struct SearchStats {
+	int numberOfSongs;
+	unsigned long playTime;
+};
+
+static void printSearchStats(struct client *client, SearchStats *stats)
+{
+	client_printf(client, "songs: %i\n", stats->numberOfSongs);
+	client_printf(client, "playtime: %li\n", stats->playTime);
+}
+
+static bool
+stats_visitor_song(SearchStats &stats, const struct locate_item_list *criteria,
+		   struct song *song)
+{
+	if (locate_song_match(song, criteria)) {
+		stats.numberOfSongs++;
+		stats.playTime += song_get_duration(song);
+	}
+
+	return true;
+}
+
+bool
+searchStatsForSongsIn(struct client *client, const char *name,
+		      const struct locate_item_list *criteria,
+		      GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, name, true);
+
+	SearchStats stats;
+	stats.numberOfSongs = 0;
+	stats.playTime = 0;
+
+	using namespace std::placeholders;
+	const auto f = std::bind(stats_visitor_song, std::ref(stats), criteria,
+				 _1);
+	if (!GetDatabase()->Visit(&selection, f, error_r))
+		return false;
+
+	printSearchStats(client, &stats);
+	return true;
+}
+
+bool
+printAllIn(struct client *client, const char *uri_utf8, GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, uri_utf8, true);
+	return db_selection_print(client, &selection, false, error_r);
+}
+
+bool
+printInfoForAllIn(struct client *client, const char *uri_utf8,
+		  GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, uri_utf8, true);
+	return db_selection_print(client, &selection, true, error_r);
+}
+
+struct StringLess {
+	gcc_pure
+	bool operator()(const char *a, const char *b) const {
+		return strcmp(a, b) < 0;
+	}
+};
+
+typedef std::set<const char *, StringLess> StringSet;
+
+static void
+visitTag(struct client *client, StringSet &set,
+	 struct song *song, enum tag_type tagType)
+{
+	struct tag *tag = song->tag;
+	bool found = false;
+
+	if (tagType == LOCATE_TAG_FILE_TYPE) {
+		song_print_uri(client, song);
+		return;
+	}
+
+	if (!tag)
+		return;
+
+	for (unsigned i = 0; i < tag->num_items; i++) {
+		if (tag->items[i]->type == tagType) {
+			set.insert(tag->items[i]->value);
+			found = true;
+		}
+	}
+
+	if (!found)
+		set.insert("");
+}
+
+static bool
+unique_tags_visitor_song(struct client *client,
+			 enum tag_type tag_type,
+			 const struct locate_item_list *criteria,
+			 StringSet &set, struct song *song)
+{
+	if (locate_song_match(song, criteria))
+		visitTag(client, set, song, tag_type);
+
+	return true;
+}
+
+bool
+listAllUniqueTags(struct client *client, int type,
+		  const struct locate_item_list *criteria,
+		  GError **error_r)
+{
+	struct db_selection selection;
+	db_selection_init(&selection, "", true);
+
+	StringSet set;
+
+	using namespace std::placeholders;
+	const auto f = std::bind(unique_tags_visitor_song, client,
+				 (enum tag_type)type, criteria, std::ref(set),
+				 _1);
+	if (!GetDatabase()->Visit(&selection, f, error_r))
+		return false;
+
+	if (type >= 0 && type <= TAG_NUM_OF_ITEM_TYPES)
+		for (auto value : set)
+			client_printf(client, "%s: %s\n",
+				      tag_item_names[type],
+				      value);
+
+	return true;
+}