started to implement project tagging, was interrupted.

next on: saving tags for user = null

tags/src/main/java/de/srsoftware/umbrella/tags/SqliteDb.java

@@ -130,8 +130,12 @@ CREATE TABLE IF NOT EXISTS "{0}" (
 	public void save(Collection<Long> userIds, String module, long entityId, Collection<String> tags) {
 		try {
 			var query = replaceInto(TABLE_TAGS,USER_ID,MODULE,ID,TAG);
-			for (var userId : userIds) {
-				for (var tag : tags) query.values(userId,module,entityId,tag);
+			for (var tag : tags)  {
+				if (userIds == null) { // tags not assigned to a user are available to all users
+					query.values(null, module, entityId, tag);
+				} else for (var userId : userIds) {
+					query.values(userId,module,entityId,tag);
+				}
 			}
 			query.execute(db).close();
 		} catch (SQLException e){