src/main/kotlin/de/uapcore/lightpit/dao/postgres/PGUserDao.kt

/*
 * Copyright 2020 Mike Becker. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package de.uapcore.lightpit.dao.postgres

import de.uapcore.lightpit.dao.AbstractUserDao
import de.uapcore.lightpit.dao.Functions
import de.uapcore.lightpit.entities.User
import java.sql.Connection
import java.sql.ResultSet

class PGUserDao(connection: Connection) : AbstractUserDao() {

    companion object {
        fun mapResult(rs: ResultSet): User {
            val id = rs.getInt("userid")
            return if (rs.wasNull()) {
                User(-1)
            } else {
                val user = User(id)
                user.username = rs.getString("username")
                user.givenname = Functions.getSafeString(rs, "givenname")
                user.lastname = Functions.getSafeString(rs, "lastname")
                user.mail = Functions.getSafeString(rs, "mail")
                user
            }
        }
    }

    private val listStmt = connection.prepareStatement(
            "select userid, username, lastname, givenname, mail " +
                    "from lpit_user where userid >= 0 " +
                    "order by username")
    private val findStmt = connection.prepareStatement(
            "select userid, username, lastname, givenname, mail " +
                    "from lpit_user where userid = ? ")
    private val findByUsernameStmt = connection.prepareStatement(
            "select userid, username, lastname, givenname, mail " +
                    "from lpit_user where lower(username) = lower(?) ")
    private val insertStmt = connection.prepareStatement("insert into lpit_user (username, lastname, givenname, mail) values (?, ?, ?, ?)")
    private val updateStmt = connection.prepareStatement("update lpit_user set lastname = ?, givenname = ?, mail = ? where userid = ?")

    override fun mapResult(rs: ResultSet): User = Companion.mapResult(rs)

    override fun save(instance: User) {
        insertStmt.setString(1, instance.username)
        Functions.setStringOrNull(insertStmt, 2, instance.lastname)
        Functions.setStringOrNull(insertStmt, 3, instance.givenname)
        Functions.setStringOrNull(insertStmt, 4, instance.mail)
        insertStmt.executeUpdate()
    }

    override fun update(instance: User): Boolean {
        Functions.setStringOrNull(updateStmt, 1, instance.lastname)
        Functions.setStringOrNull(updateStmt, 2, instance.givenname)
        Functions.setStringOrNull(updateStmt, 3, instance.mail)
        updateStmt.setInt(4, instance.id)
        return updateStmt.executeUpdate() > 0
    }

    override fun list(): List<User> = super.list(listStmt)

    override fun find(id: Int): User? {
        findStmt.setInt(1, id)
        return super.find(findStmt)
    }

    override fun findByUsername(username: String): User? {
        findByUsernameStmt.setString(1, username)
        return super.find(findByUsernameStmt)
    }
}