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package com.openexchange.groupware.update.tasks;

import static com.openexchange.tools.sql.DBUtils.autocommit;
import static com.openexchange.tools.sql.DBUtils.rollback;
import static com.openexchange.tools.update.Tools.createIndex;
import static com.openexchange.tools.update.Tools.dropIndex;
import static com.openexchange.tools.update.Tools.existsIndex;
import java.sql.Connection;
import java.sql.SQLException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.openexchange.databaseold.Database;
import com.openexchange.groupware.AbstractOXException;
import com.openexchange.groupware.update.Schema;
import com.openexchange.groupware.update.UpdateExceptionCodes;
import com.openexchange.groupware.update.UpdateTask;

/**
 *
 * @author <a href="mailto:marcus@open-xchange.org">Marcus Klein</a>
 */
public class CorrectIndexes implements UpdateTask {

    private static final Log LOG = LogFactory.getLog(CorrectIndexes.class);

    public CorrectIndexes() {
        super();
    }

    /**
     * {@inheritDoc}
     */
    public int addedWithVersion() {
        return 30;
    }

    /**
     * {@inheritDoc}
     */
    public int getPriority() {
        return UpdateTaskPriority.NORMAL.priority;
    }

    public void perform(final Schema schema, final int contextId)
        throws AbstractOXException {
        final Connection con = Database.getNoTimeout(contextId, true);
        try {
            con.setAutoCommit(false);
            correctAppointmentIndexes(con);
            correctGroupIndexes(con);
            correctResourceIndexes(con);
            correctSettingsIndexes(con);
            con.commit();
        } catch (final SQLException e) {
            rollback(con);
            throw UpdateExceptionCodes.SQL_PROBLEM.create(e, e.getMessage());
        } finally {
            autocommit(con);
            Database.backNoTimeout(contextId, true, con);
        }
    }

    private void correctAppointmentIndexes(final Connection con) {
        final String table = "prg_dates";
        final String[] oldcolumns1 = new String[] { "timestampfield01" };
        final String[] newcolumns1 = new String[] { "cid", "timestampfield01" };
        try {
            final String index2Drop = existsIndex(con, table, oldcolumns1);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop
                    + " on table " + table + ".");
                dropIndex(con, table, index2Drop);
            }
            final String index2Create = existsIndex(con, table, newcolumns1);
            if (null == index2Create) {
                LOG.info("Creating new index (cid,timestampfield01) on table "
                    + table + ".");
                createIndex(con, table, newcolumns1);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table + ".", e);
        }
        final String[] oldcolumns2 = new String[] { "timestampfield02" };
        final String[] newcolumns2 = new String[] { "cid", "timestampfield02" };
        try {
            final String index2Drop = existsIndex(con, table, oldcolumns2);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop + " on table "
                    + table + ".");
                dropIndex(con, table, index2Drop);
            }
            final String index2Create = existsIndex(con, table, newcolumns2);
            if (null == index2Create) {
                LOG.info("Creating new index (cid,timestampfield02) on table "
                    + table + ".");
                createIndex(con, table, newcolumns2);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table + ".", e);
        }
        final String[] newcolumns3 = new String[] { "cid", "intfield02" };
        try {
            final String index2Create = existsIndex(con, table, newcolumns3);
            if (null == index2Create) {
                LOG.info("Creating new index (cid,intfield02) on table "
                    + table + ".");
                createIndex(con, table, newcolumns3);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table + ".", e);
        }
    }

    private void correctSettingsIndexes(final Connection con) {
        final String table = "user_setting_mail_signature";
        final String[] oldcolumns = new String[] { "cid", "user" };
        try {
            final String index2Drop = existsIndex(con, table, oldcolumns);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop
                    + " on table " + table + ".");
                dropIndex(con, table, index2Drop);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table + ".", e);
        }
    }

    private void correctGroupIndexes(final Connection con) {
        final String table1 = "groups";
        final String[] oldcolumns1 = new String[] { "identifier" };
        try {
            final String index2Drop = existsIndex(con, table1, oldcolumns1);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop
                    + " on table " + table1 + ".");
                dropIndex(con, table1, index2Drop);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table1 + ".", e);
        }
        final String table2 = "groups_member";
        final String[] oldcolumns2 = new String[] { "cid", "id" };
        try {
            final String index2Drop = existsIndex(con, table2, oldcolumns2);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop
                    + " on table " + table2 + ".");
                dropIndex(con, table2, index2Drop);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table2 + ".", e);
        }
    }

    private void correctResourceIndexes(final Connection con) {
        final String table = "resource";
        final String[] oldcolumns = new String[] { "identifier" };
        try {
            final String index2Drop = existsIndex(con, table, oldcolumns);
            if (null != index2Drop) {
                LOG.info("Dropping old index " + index2Drop
                    + " on table " + table + ".");
                dropIndex(con, table, index2Drop);
            }
        } catch (final SQLException e) {
            LOG.error("Problem correcting indexes on table " + table + ".", e);
        }
    }
}
