add: stacks mode and sort

crates/core/src/model/stacks.rs

@@ -15,6 +15,34 @@ impl Default for StackPrivacy {
     }
 }
 
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub enum StackMode {
+    /// `users` vec contains ID of users to INCLUDE into the timeline;
+    /// every other user is excluded
+    Include,
+    /// `users` vec contains ID of users to EXCLUDE from the timeline;
+    /// every other user is included
+    Exclude,
+}
+
+impl Default for StackMode {
+    fn default() -> Self {
+        Self::Include
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub enum StackSort {
+    Created,
+    Likes,
+}
+
+impl Default for StackSort {
+    fn default() -> Self {
+        Self::Created
+    }
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct UserStack {
     pub id: usize,
@@ -23,6 +51,8 @@ pub struct UserStack {
     pub name: String,
     pub users: Vec<usize>,
     pub privacy: StackPrivacy,
+    pub mode: StackMode,
+    pub sort: StackSort,
 }
 
 impl UserStack {
@@ -35,6 +65,8 @@ impl UserStack {
             name,
             users,
             privacy: StackPrivacy::default(),
+            mode: StackMode::default(),
+            sort: StackSort::default(),
         }
     }
 }