src/main/kotlin/de/uapcore/lightpit/dao/postgres/PGProjectDao.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.AbstractProjectDao
import de.uapcore.lightpit.dao.Functions
import de.uapcore.lightpit.entities.IssueSummary
import de.uapcore.lightpit.entities.Project
import de.uapcore.lightpit.entities.User
import java.sql.Connection
import java.sql.PreparedStatement
import java.sql.ResultSet

class PGProjectDao(connection: Connection) : AbstractProjectDao() {

    private val query = "select projectid, name, node, description, repourl, " +
            "userid, username, lastname, givenname, mail " +
            "from lpit_project " +
            "left join lpit_user owner on lpit_project.owner = owner.userid "

    private val listStmt = connection.prepareStatement("$query order by name")
    private val findStmt = connection.prepareStatement("$query where projectid = ?")
    private val findByNodeStmt = connection.prepareStatement("$query where node = ?")
    private val issueSummaryStmt = connection.prepareStatement(
            "select phase, count(*) as total " +
                    "from lpit_issue " +
                    "join lpit_issue_phases using(status) " +
                    "where project = ? " +
                    "group by phase "
    )
    private val insertStmt = connection.prepareStatement(
            "insert into lpit_project (name, node, description, repourl, owner) values (?, ?, ?, ?, ?)"
    )
    private val updateStmt = connection.prepareStatement(
            "update lpit_project set name = ?, node = ?, description = ?, repourl = ?, owner = ? where projectid = ?"
    )

    override fun mapResult(rs: ResultSet): Project {
        val proj = Project(rs.getInt("projectid"))
        proj.name = rs.getString("name")
        proj.node = rs.getString("node")
        proj.description = rs.getString("description")
        proj.repoUrl = rs.getString("repourl")
        proj.owner = PGUserDao.mapResult(rs).takeUnless { rs.wasNull() }
        return proj
    }

    override fun getIssueSummary(project: Project): IssueSummary {
        issueSummaryStmt.setInt(1, project.id)
        val result = issueSummaryStmt.executeQuery()
        val summary = IssueSummary()
        while (result.next()) {
            val phase = result.getInt("phase")
            val total = result.getInt("total")
            when (phase) {
                0 -> summary.open = total
                1 -> summary.active = total
                2 -> summary.done = total
            }
        }
        return summary
    }

    private fun setColumns(stmt: PreparedStatement, instance: Project): Int {
        var column = 0
        stmt.setString(++column, instance.name)
        stmt.setString(++column, instance.node)
        Functions.setStringOrNull(stmt, ++column, instance.description)
        Functions.setStringOrNull(stmt, ++column, instance.repoUrl)
        setForeignKeyOrNull(stmt, ++column, instance.owner, User::id)
        return column
    }

    override fun save(instance: Project) {
        setColumns(insertStmt, instance)
        insertStmt.executeUpdate()
    }

    override fun update(instance: Project): Boolean {
        var column = setColumns(updateStmt, instance)
        updateStmt.setInt(++column, instance.id)
        return updateStmt.executeUpdate() > 0
    }

    override fun list(): List<Project> {
        return super.list(listStmt)
    }

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

    override fun findByNode(node: String): Project? {
        findByNodeStmt.setString(1, node)
        return super.find(findByNodeStmt)
    }
}