<?php
    //This php script contains all the stuff to backup/restore
    //assignment mods

    //This is the "graphical" structure of the assignment mod:
    //
    //                     assignment
    //                    (CL,pk->id)
    //                        |
    //                        |
    //                        |
    //                 assignment_submisions
    //           (UL,pk->id, fk->assignment,files)
    //
    // Meaning: pk->primary key field of the table
    //          fk->foreign key to link with parent
    //          nt->nested field (recursive data)
    //          CL->course level info
    //          UL->user level info
    //          files->table may have files)
    //
    //-----------------------------------------------------------


    //This function returns a log record with all the necessay transformations
    //done. It's used by restore_log_module() to restore modules log.
    function assignment_restore_logs($restore,$log) {

        $status = false;

        //Depending of the action, we recode different things
        switch ($log->action) {
        case "add":
            if ($log->cmid) {
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
                if ($mod) {
                    $log->url = "view.php?id=".$log->cmid;
                    $log->info = $mod->new_id;
                    $status = true;
                }
            }
            break;
        case "update":
            if ($log->cmid) {
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
                if ($mod) {
                    $log->url = "view.php?id=".$log->cmid;
                    $log->info = $mod->new_id;
                    $status = true;
                }
            }
            break;
        case "view":
            if ($log->cmid) {
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
                if ($mod) {
                    $log->url = "view.php?id=".$log->cmid;
                    $log->info = $mod->new_id;
                    $status = true;
                }
            }
            break;
        case "view all":
            $log->url = "index.php?id=".$log->course;
            $status = true;
            break;
        case "upload":
            if ($log->cmid) {
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
                if ($mod) {
                    $log->url = "view.php?a=".$mod->new_id;
                    $log->info = $mod->new_id;
                    $status = true;
                }
            }
            break;
        case "view submission":
            if ($log->cmid) {
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
                if ($mod) {
                    $log->url = "submissions.php?id=".$mod->new_id;
                    $log->info = $mod->new_id;
                    $status = true;
                }
            }
            break;
        case "update grades":
            if ($log->cmid) {
                //Extract the assignment id from the url field
                $assid = substr(strrchr($log->url,"="),1);
                //Get the new_id of the module (to recode the info field)
                $mod = backup_getid($restore->backup_unique_code,$log->module,$assid);
                if ($mod) {
                    $log->url = "submissions.php?id=".$mod->new_id;
                    $status = true;
                }
            }
            break;
        default:
            if (!defined('RESTORE_SILENTLY')) {
                echo "action (".$log->module."-".$log->action.") unknown. Not restored<br />";                 //Debug
            }
            break;
        }

        if ($status) {
            $status = $log;
        }
        return $status;
    }