(Added) sync group function.

tui_rsync/models/models.py

@@ -109,6 +109,16 @@ class Destination(BaseModel):
 class Group(BaseModel):
     label = CharField(unique=True)
 
+    @staticmethod
+    def is_exist(label) -> bool:
+        return Group.select().where(Group.label == label).exists()
+
+    @staticmethod
+    def get_group(label):
+        if not Group.is_exist(label):
+            return None
+        return Group.select().where(Group.label == label).get()
+
     @staticmethod
     def create_save(label:str, source_labels:list[str]):
         group = Group.create(
@@ -122,6 +132,12 @@ class Group(BaseModel):
         group.save()
         return group
 
+    def get_sources(self):
+        """
+        Return iterator of the group sources.
+        """
+        return (group_src.source for group_src in self.sources)
+
     def __str__(self) -> str:
         return f"{self.label}"
 
@@ -144,6 +160,10 @@ def create_tables():
         ]
         db.create_tables(tables, safe=True)
 
+def all_group_labels():
+    with db:
+        return Group.select(Group.label)
+
 def all_labels():
     with db:
         return Source.select(Source.label)