Added a function to change password

database/pkg.go

@@ -284,5 +284,36 @@ func (db *T) CreateUser(username, password, name string) (userID int64, err erro
 	err = row.Scan(&userID)
 	return
 } // }}}
+func (db *T) ChangePassword(userID int, currentPassword, newPassword string) (changed bool, err error) { // {{{
+	var res sql.Result
+	res, err = db.Conn.Exec(`
+		UPDATE _webservice.user
+		SET
+			"password" = _webservice.password_hash(
+				/* salt in hex */
+				ENCODE(_webservice.gen_random_bytes(16), 'hex'),
+
+				/* password */
+				$3::bytea
+			)
+		WHERE
+			id = $1 AND
+			"password" = _webservice.password_hash(SUBSTRING(password FROM 1 FOR 32), $2::bytea)
+
+		`,
+		userID,
+		currentPassword,
+		newPassword,
+	)
+
+	var rowsAffected int64
+	rowsAffected, err = res.RowsAffected()
+	if err != nil {
+		return
+	}
+
+	changed = (rowsAffected == 1)
+	return
+} // }}}
 
 // vim: foldmethod=marker