Matrix/utils/database/roomDatabaseConnector.go

package database

import (
	"database/sql"
	"fmt"
	"log"

	"nutfactory.org/Matrix/entities/room"
)

func initRoomTable(db *sql.DB) (err error) {
	log.Printf("Init Room Table")
	statement, err := db.Prepare(`CREATE TABLE IF NOT EXISTS room (
		id TEXT PRIMARY KEY, 
		version TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()
	statement, err = db.Prepare(`CREATE TABLE IF NOT EXISTS roomMember (
		userId TEXT, 
		roomId TEXT,
		PRIMARY KEY (userId, roomId)
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	//TODO: Test Queries

	return
}

func CreateRoom(db *sql.DB, room *room.Room, userId string) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO room
		(id, version)
		VALUES
		(?, ?)`)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(room.Id, room.Version)
	if err != nil {
		return
	}
	tx.Commit()
	err = CreateRoomMember(db, room.Id, userId)
	return
}

func CreateRoomMember(db *sql.DB, roomId string, userId string) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO roomMember
		(roomId, userId)
		VALUES
		(?, ?)`)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(roomId, userId)
	if err != nil {
		return
	}
	tx.Commit()
	return
}

func ReadRoom(db *sql.DB, id string) (foundRoom *room.Room, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, version 
		FROM room
		WHERE id = '%s'`, id)

	rows, err := db.Query(queryStmt)
	if err != nil {
		return
	}

	defer rows.Close()

	if rows.Next() {
		foundRoom = &room.Room{}
		err = rows.Scan(&foundRoom.Id, &foundRoom.Version)
		if err != nil {
			return
		}
		foundRoom.Messages, err = ReadEventsFromRoom(db, foundRoom.Id)
		if err != nil {
			return
		}
		foundRoom.Members, err = ReadRoomMembers(db, foundRoom.Id)
		if err != nil {
			return
		}
	}

	return
}

func ReadRoomMembers(db *sql.DB, roomId string) (roomMembers []string, err error) {
	queryStmt := fmt.Sprintf(`SELECT userId 
		FROM roomMember
		WHERE roomId = '%s'`, roomId)

	rows, err := db.Query(queryStmt)
	if err != nil {
		return
	}

	defer rows.Close()

	roomMembers = []string{}

	for rows.Next() {
		var foundUser string
		err = rows.Scan(&foundUser)
		if err != nil {
			return
		}
		roomMembers = append(roomMembers, foundUser)
	}

	return
}

func UpdateRoom(db *sql.DB, room *room.Room) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE room SET
			version = ?
		WHERE id = ?`)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(room.Version, room.Id)
	if err != nil {
		return
	}

	tx.Commit()
	return
}

func DeleteRoom(db *sql.DB, id string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM room 
		WHERE id = '%s'`, id)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	_, err = db.Exec(queryStmt)
	if err != nil {
		return
	}

	err = DeleteAllRoomMemberForRoom(db, id)

	tx.Commit()
	return
}

func DeleteRoomMember(db *sql.DB, roomId string, userId string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM roomMember 
		WHERE userId = '%s' AND roomId = '%s'`, userId, roomId)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	_, err = db.Exec(queryStmt)
	if err != nil {
		return
	}

	tx.Commit()
	return
}

func DeleteAllRoomMemberForUser(db *sql.DB, userId string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM roomMember 
		WHERE userId = '%s'`, userId)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	_, err = db.Exec(queryStmt)
	if err != nil {
		return
	}

	tx.Commit()
	return
}

func DeleteAllRoomMemberForRoom(db *sql.DB, roomId string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM roomMember 
		WHERE roomId = '%s'`, roomId)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	_, err = db.Exec(queryStmt)
	if err != nil {
		return
	}

	tx.Commit()
	return
}