<?php
/*
 * Name: Database Upgrader
 * Author: Shish <webmaster@shishnet.org>
 * Link: http://code.shishnet.org/shimmie2/
 * Description: Keeps things happy behind the scenes
 * Visibility: admin
 */

class Upgrade extends Extension
{
    public function onInitExt(InitExtEvent $event)
    {
        global $config, $database;

        if ($config->get_bool("in_upgrade")) {
            return;
        }

        if (!is_numeric($config->get_string("db_version"))) {
            $config->set_int("db_version", 2);
        }

        if ($config->get_int("db_version") < 6) {
            // cry :S
        }

        // v7 is convert to innodb with adodb
        // now done again as v9 with PDO

        if ($config->get_int("db_version") < 8) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 8);

            $database->execute($database->scoreql_to_sql(
                "ALTER TABLE images ADD COLUMN locked SCORE_BOOL NOT NULL DEFAULT SCORE_BOOL_N"
            ));

            log_info("upgrade", "Database at version 8");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 9) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 9);

            if ($database->get_driver_name() == 'mysql') {
                $tables = $database->get_col("SHOW TABLES");
                foreach ($tables as $table) {
                    log_info("upgrade", "converting $table to innodb");
                    $database->execute("ALTER TABLE $table ENGINE=INNODB");
                }
            }

            log_info("upgrade", "Database at version 9");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 10) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 10);

            log_info("upgrade", "Adding foreign keys to images");
            $database->Execute("ALTER TABLE images ADD FOREIGN KEY (owner_id) REFERENCES users(id) ON DELETE RESTRICT");
        
            log_info("upgrade", "Database at version 10");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 11) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 11);

            log_info("upgrade", "Converting user flags to classes");
            $database->execute("ALTER TABLE users ADD COLUMN class VARCHAR(32) NOT NULL default :user", ["user" => "user"]);
            $database->execute("UPDATE users SET class = :name WHERE id=:id", ["name"=>"anonymous", "id"=>$config->get_int('anon_id')]);
            $database->execute("UPDATE users SET class = :name WHERE admin=:admin", ["name"=>"admin", "admin"=>'Y']);

            log_info("upgrade", "Database at version 11");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 12) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 12);

            if ($database->get_driver_name() == 'pgsql') {
                log_info("upgrade", "Changing ext column to VARCHAR");
                $database->execute("ALTER TABLE images ALTER COLUMN ext SET DATA TYPE VARCHAR(4)");
            }

            log_info("upgrade", "Lowering case of all exts");
            $database->execute("UPDATE images SET ext = LOWER(ext)");

            log_info("upgrade", "Database at version 12");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 13) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 13);

            log_info("upgrade", "Changing password column to VARCHAR(250)");
            if ($database->get_driver_name() == 'pgsql') {
                $database->execute("ALTER TABLE users ALTER COLUMN pass SET DATA TYPE VARCHAR(250)");
            } elseif ($database->get_driver_name() == 'mysql') {
                $database->execute("ALTER TABLE users CHANGE pass pass VARCHAR(250)");
            }

            log_info("upgrade", "Database at version 13");
            $config->set_bool("in_upgrade", false);
        }

        if ($config->get_int("db_version") < 14) {
            $config->set_bool("in_upgrade", true);
            $config->set_int("db_version", 14);

            log_info("upgrade", "Changing tag column to VARCHAR(255)");
            if ($database->get_driver_name() == 'pgsql') {
                $database->execute('ALTER TABLE tags ALTER COLUMN tag SET DATA TYPE VARCHAR(255)');
                $database->execute('ALTER TABLE aliases ALTER COLUMN oldtag SET DATA TYPE VARCHAR(255)');
                $database->execute('ALTER TABLE aliases ALTER COLUMN newtag SET DATA TYPE VARCHAR(255)');
            } elseif ($database->get_driver_name() == 'mysql') {
                $database->execute('ALTER TABLE tags MODIFY COLUMN tag VARCHAR(255) NOT NULL');
                $database->execute('ALTER TABLE aliases MODIFY COLUMN oldtag VARCHAR(255) NOT NULL');
                $database->execute('ALTER TABLE aliases MODIFY COLUMN newtag VARCHAR(255) NOT NULL');
            }

            log_info("upgrade", "Database at version 14");
            $config->set_bool("in_upgrade", false);
        }
    }

    public function get_priority(): int
    {
        return 5;
    }
}