RealTime Action (Server)

src/main/java/org/to/telegramfinalproject/Database/ChannelDatabase.java

@@ -601,4 +601,19 @@ public class ChannelDatabase {
         }
     }
 
+    public static List<UUID> getChannelSubscriberUUIDs(UUID channelId) {
+        List<UUID> subscriberIds = new ArrayList<>();
+        try (Connection conn = ConnectionDb.connect();
+             PreparedStatement stmt = conn.prepareStatement("SELECT user_id FROM channel_subscribers WHERE channel_id = ?")) {
+            stmt.setObject(1, channelId);
+            ResultSet rs = stmt.executeQuery();
+            while (rs.next()) {
+                subscriberIds.add(UUID.fromString(rs.getString("user_id")));
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return subscriberIds;
+    }
+
 }

src/main/java/org/to/telegramfinalproject/Database/ContactDatabase.java

@@ -34,6 +34,15 @@ public class ContactDatabase {
         }
     }
 
+    public static List<UUID> getContactUUIDs(UUID userId) {
+        List<Contact> contacts = getContacts(userId);
+        List<UUID> contactIds = new ArrayList<>();
+        for (Contact c : contacts) {
+            contactIds.add(c.getContact_id());
+        }
+        return contactIds;
+    }
+
 
 
     public boolean removeContact(UUID user_id, UUID contact_id)  {

src/main/java/org/to/telegramfinalproject/Database/GroupDatabase.java

@@ -600,4 +600,19 @@ public class GroupDatabase {
     }
 
 
+    public static List<UUID> getGroupMemberUUIDs(UUID groupId) {
+        List<UUID> memberIds = new ArrayList<>();
+        try (Connection conn = ConnectionDb.connect();
+             PreparedStatement stmt = conn.prepareStatement("SELECT user_id FROM group_members WHERE group_id = ?")) {
+            stmt.setObject(1, groupId);
+            ResultSet rs = stmt.executeQuery();
+            while (rs.next()) {
+                memberIds.add(UUID.fromString(rs.getString("user_id")));
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return memberIds;
+    }
+
 }