use go module for dependencies (#594)

clientapi/auth/storage/accounts/membership_table.go

@@ -0,0 +1,132 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package accounts
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/lib/pq"
+	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+)
+
+const membershipSchema = `
+-- Stores data about users memberships to rooms.
+CREATE TABLE IF NOT EXISTS account_memberships (
+    -- The Matrix user ID localpart for the member
+    localpart TEXT NOT NULL,
+    -- The room this user is a member of
+    room_id TEXT NOT NULL,
+    -- The ID of the join membership event
+    event_id TEXT NOT NULL,
+
+    -- A user can only be member of a room once
+    PRIMARY KEY (localpart, room_id)
+);
+
+-- Use index to process deletion by ID more efficiently
+CREATE UNIQUE INDEX IF NOT EXISTS account_membership_event_id ON account_memberships(event_id);
+`
+
+const insertMembershipSQL = `
+	INSERT INTO account_memberships(localpart, room_id, event_id) VALUES ($1, $2, $3)
+	ON CONFLICT (localpart, room_id) DO UPDATE SET event_id = EXCLUDED.event_id
+`
+
+const selectMembershipsByLocalpartSQL = "" +
+	"SELECT room_id, event_id FROM account_memberships WHERE localpart = $1"
+
+const selectMembershipInRoomByLocalpartSQL = "" +
+	"SELECT event_id FROM account_memberships WHERE localpart = $1 AND room_id = $2"
+
+const deleteMembershipsByEventIDsSQL = "" +
+	"DELETE FROM account_memberships WHERE event_id = ANY($1)"
+
+type membershipStatements struct {
+	deleteMembershipsByEventIDsStmt       *sql.Stmt
+	insertMembershipStmt                  *sql.Stmt
+	selectMembershipInRoomByLocalpartStmt *sql.Stmt
+	selectMembershipsByLocalpartStmt      *sql.Stmt
+}
+
+func (s *membershipStatements) prepare(db *sql.DB) (err error) {
+	_, err = db.Exec(membershipSchema)
+	if err != nil {
+		return
+	}
+	if s.deleteMembershipsByEventIDsStmt, err = db.Prepare(deleteMembershipsByEventIDsSQL); err != nil {
+		return
+	}
+	if s.insertMembershipStmt, err = db.Prepare(insertMembershipSQL); err != nil {
+		return
+	}
+	if s.selectMembershipInRoomByLocalpartStmt, err = db.Prepare(selectMembershipInRoomByLocalpartSQL); err != nil {
+		return
+	}
+	if s.selectMembershipsByLocalpartStmt, err = db.Prepare(selectMembershipsByLocalpartSQL); err != nil {
+		return
+	}
+	return
+}
+
+func (s *membershipStatements) insertMembership(
+	ctx context.Context, txn *sql.Tx, localpart, roomID, eventID string,
+) (err error) {
+	stmt := txn.Stmt(s.insertMembershipStmt)
+	_, err = stmt.ExecContext(ctx, localpart, roomID, eventID)
+	return
+}
+
+func (s *membershipStatements) deleteMembershipsByEventIDs(
+	ctx context.Context, txn *sql.Tx, eventIDs []string,
+) (err error) {
+	stmt := txn.Stmt(s.deleteMembershipsByEventIDsStmt)
+	_, err = stmt.ExecContext(ctx, pq.StringArray(eventIDs))
+	return
+}
+
+func (s *membershipStatements) selectMembershipInRoomByLocalpart(
+	ctx context.Context, localpart, roomID string,
+) (authtypes.Membership, error) {
+	membership := authtypes.Membership{Localpart: localpart, RoomID: roomID}
+	stmt := s.selectMembershipInRoomByLocalpartStmt
+	err := stmt.QueryRowContext(ctx, localpart, roomID).Scan(&membership.EventID)
+
+	return membership, err
+}
+
+func (s *membershipStatements) selectMembershipsByLocalpart(
+	ctx context.Context, localpart string,
+) (memberships []authtypes.Membership, err error) {
+	stmt := s.selectMembershipsByLocalpartStmt
+	rows, err := stmt.QueryContext(ctx, localpart)
+	if err != nil {
+		return
+	}
+
+	memberships = []authtypes.Membership{}
+
+	defer rows.Close() // nolint: errcheck
+	for rows.Next() {
+		var m authtypes.Membership
+		m.Localpart = localpart
+		if err := rows.Scan(&m.RoomID, &m.EventID); err != nil {
+			return nil, err
+		}
+		memberships = append(memberships, m)
+	}
+
+	return
+}