src/main/java/de/uapcore/lightpit/dao/postgres/PGProjectDao.java

/*
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 * Copyright 2018 Mike Becker. All rights reserved.
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package de.uapcore.lightpit.dao.postgres;

import de.uapcore.lightpit.dao.Functions;
import de.uapcore.lightpit.dao.ProjectDao;
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;
import java.sql.SQLException;
import java.util.List;

import static de.uapcore.lightpit.dao.Functions.setForeignKeyOrNull;
import static de.uapcore.lightpit.dao.Functions.setStringOrNull;

public final class PGProjectDao implements ProjectDao {

    private final PreparedStatement insert, update, list, find, findByNode;
    private final PreparedStatement issue_summary;

    public PGProjectDao(Connection connection) throws SQLException {
        final var 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 ";

        list = connection.prepareStatement(query + " order by name");

        find = connection.prepareStatement(query + " where projectid = ?");
        findByNode = connection.prepareStatement(query + " where node = ?");

        issue_summary = connection.prepareStatement(
                "select phase, count(*) as total "+
                        "from lpit_issue " +
                        "join lpit_issue_phases using(status) " +
                        "where project = ? "+
                        "group by phase "
        );

        insert = connection.prepareStatement(
                "insert into lpit_project (name, node, description, repourl, owner) values (?, ?, ?, ?, ?)"
        );
        update = connection.prepareStatement(
                "update lpit_project set name = ?, node = ?, description = ?, repourl = ?, owner = ? where projectid = ?"
        );
    }

    private static Project mapColumns(ResultSet result) throws SQLException {
        final var proj = new Project(result.getInt("projectid"));
        proj.setName(result.getString("name"));
        proj.setNode(result.getString("node"));
        proj.setDescription(result.getString("description"));
        proj.setRepoUrl(result.getString("repourl"));
        proj.setOwner(PGUserDao.mapColumns(result));

        return proj;
    }

    public IssueSummary getIssueSummary(Project project) throws SQLException {
        issue_summary.setInt(1, project.getId());
        final var result = issue_summary.executeQuery();
        final var summary = new IssueSummary();
        while (result.next()) {
            final var phase = result.getInt("phase");
            final var total = result.getInt("total");
            switch(phase) {
                case 0:
                    summary.setOpen(total);
                    break;
                case 1:
                    summary.setActive(total);
                    break;
                case 2:
                    summary.setDone(total);
                    break;
            }
        }
        return summary;
    }

    private static int setColumns(PreparedStatement stmt, Project instance) throws SQLException {
        int column = 0;
        stmt.setString(++column, instance.getName());
        stmt.setString(++column, instance.getNode());
        setStringOrNull(stmt, ++column, instance.getDescription());
        setStringOrNull(stmt, ++column, instance.getRepoUrl());
        setForeignKeyOrNull(stmt, ++column, instance.getOwner(), User::getId);
        return column;
    }

    @Override
    public void save(Project instance) throws SQLException {
        setColumns(insert, instance);
        insert.executeUpdate();
    }

    @Override
    public boolean update(Project instance) throws SQLException {
        if (instance.getId() < 0) return false;
        int column = setColumns(update, instance);
        update.setInt(++column, instance.getId());
        return update.executeUpdate() > 0;
    }

    @Override
    public List<Project> list() throws SQLException {
        return Functions.list(list, PGProjectDao::mapColumns);
    }

    @Override
    public Project find(int id) throws SQLException {
        find.setInt(1, id);
        return Functions.find(find, PGProjectDao::mapColumns);
    }

    @Override
    public Project findByNode(String node) throws SQLException {
        findByNode.setString(1, node);
        return Functions.find(findByNode, PGProjectDao::mapColumns);
    }
}