added add member to group route

database/groups.go

@@ -20,34 +20,60 @@ func CreateGroup(db *sql.DB, groupName string, userID uuid.UUID) (uuid.UUID, err
   	  RETURNING granted_at;
   	`
 
-	addMemberToGroupQuery := `
-  	  INSERT INTO Memberships (conversation_id, user_id)
-  	  VALUES ($1, $2)
-  	  ON CONFLICT DO NOTHING
-  	  RETURNING user_id;
-  	`
-
+	// Create conversation
 	var groupID uuid.UUID
 	err := db.QueryRow(createConversationQuery, groupName).Scan(&groupID)
 	if err != nil {
 		return uuid.Nil, helpers.NewError(helpers.ErrInternal, "Failed to create group", fmt.Errorf("failed to create group: %w", err))
 	}
 
+	// Insert group admin (make user that created the group an admin)
 	var grantedAt string
 	err = db.QueryRow(insertGroupAdminQuery, groupID, userID, userID).Scan(&grantedAt)
 	if err != nil {
 		return uuid.Nil, helpers.NewError(helpers.ErrInternal, "Failed to create group", fmt.Errorf("failed to insert group admin: %w", err))
 	}
 
-	var memberID uuid.UUID
-	err = db.QueryRow(addMemberToGroupQuery, groupID, userID).Scan(&memberID)
+	// Add self as group member
+	_, err = AddMemberToGroup(db, userID, groupID)
 	if err != nil {
-		return uuid.Nil, helpers.NewError(helpers.ErrInternal, "Failed to create group", fmt.Errorf("failed to add member to group: %w", err))
+		return uuid.Nil, err
 	}
 
+	// Insert group contact
 	_, err = InsertContactByID(db, userID, groupID)
 	if err != nil {
 		return groupID, helpers.NewError(helpers.ErrInternal, "Failed to create group contact", fmt.Errorf("failed to insert group contact: %w", err))
 	}
+
 	return groupID, nil
 }
+
+func AddMemberToGroup(db *sql.DB, userID uuid.UUID, groupID uuid.UUID) (uuid.UUID, error) {
+	query := `
+  	  INSERT INTO Memberships (conversation_id, user_id)
+  	  VALUES ($1, $2)
+  	  ON CONFLICT DO NOTHING
+  	  RETURNING user_id;
+  	`
+	var memberID uuid.UUID
+	err := db.QueryRow(query, groupID, userID).Scan(&memberID)
+	if err != nil {
+		return uuid.Nil, helpers.NewError(helpers.ErrInternal, "Failed to add member to group", fmt.Errorf("failed to add member to group: %w", err))
+	}
+	return memberID, nil
+}
+
+func IsAdmin(db *sql.DB, userID uuid.UUID, conversationID uuid.UUID) (bool, error) {
+	query := `
+  	  SELECT COUNT(1) FROM GroupAdmins
+  	  WHERE user_id = $1
+  	  AND conversation_id = $2;
+  	`
+	var count int
+	err := db.QueryRow(query, userID, conversationID).Scan(&count)
+	if err != nil {
+		return false, helpers.NewError(helpers.ErrInternal, "Failed to check admin status", fmt.Errorf("failed to check admin status: %w", err))
+	}
+	return count > 0, nil
+}