update_walk: move code to update_container.c

1 files changed, 124 insertions, 0 deletions

diff --git a/src/update_container.c b/src/update_container.c
new file mode 100644
index 000000000..9fe4bb0a9
--- /dev/null
+++ b/src/update_container.c
@@ -0,0 +1,124 @@
+/*
+ * 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" /* must be first for large file support */
+#include "update_container.h"
+#include "update_internal.h"
+#include "update_db.h"
+#include "db_lock.h"
+#include "directory.h"
+#include "song.h"
+#include "mapper.h"
+#include "glib_compat.h"
+#include "decoder_plugin.h"
+#include "tag.h"
+#include "tag_handler.h"
+
+#include <glib.h>
+
+/**
+ * Create the specified directory object if it does not exist already
+ * or if the #stat object indicates that it has been modified since
+ * the last update.  Returns NULL when it exists already and is
+ * unmodified.
+ *
+ * The caller must lock the database.
+ */
+static struct directory *
+make_directory_if_modified(struct directory *parent, const char *name,
+			   const struct stat *st)
+{
+	struct directory *directory = directory_get_child(parent, name);
+
+	// directory exists already
+	if (directory != NULL) {
+		if (directory->mtime == st->st_mtime && !walk_discard) {
+			/* not modified */
+			db_unlock();
+			return NULL;
+		}
+
+		delete_directory(directory);
+		modified = true;
+	}
+
+	directory = directory_make_child(parent, name);
+	directory->mtime = st->st_mtime;
+	return directory;
+}
+
+bool
+update_container_file(struct directory *directory,
+		      const char *name,
+		      const struct stat *st,
+		      const struct decoder_plugin *plugin)
+{
+	if (plugin->container_scan == NULL)
+		return false;
+
+	db_lock();
+	struct directory *contdir =
+		make_directory_if_modified(directory, name, st);
+	if (contdir == NULL) {
+		/* not modified */
+		db_unlock();
+		return true;
+	}
+
+	contdir->device = DEVICE_CONTAINER;
+	db_unlock();
+
+	char *const pathname = map_directory_child_fs(directory, name);
+
+	char *vtrack;
+	unsigned int tnum = 0;
+	while ((vtrack = plugin->container_scan(pathname, ++tnum)) != NULL) {
+		struct song *song = song_file_new(vtrack, contdir);
+
+		// shouldn't be necessary but it's there..
+		song->mtime = st->st_mtime;
+
+		char *child_path_fs = map_directory_child_fs(contdir, vtrack);
+
+		song->tag = tag_new();
+		decoder_plugin_scan_file(plugin, child_path_fs,
+					 &add_tag_handler, song->tag);
+		g_free(child_path_fs);
+
+		db_lock();
+		directory_add_song(contdir, song);
+		db_unlock();
+
+		modified = true;
+
+		g_message("added %s/%s",
+			  directory_get_path(directory), vtrack);
+		g_free(vtrack);
+	}
+
+	g_free(pathname);
+
+	if (tnum == 1) {
+		db_lock();
+		delete_directory(contdir);
+		db_unlock();
+		return false;
+	} else
+		return true;
+}