engelsystem/includes/mailer/shifts_mailer.php

<?php

function mail_shift_change($old_shift, $new_shift)
{
    $users = ShiftEntries_by_shift($old_shift["SID"]);
    $old_room = Room($old_shift["RID"]);
    $new_room = Room($new_shift["RID"]);

    $noticable_changes = false;

    $message = _("A Shift you are registered on has changed:");
    $message .= "\n";

    if ($old_shift["name"] != $new_shift["name"]) {
        $message .= sprintf(_("* Shift type changed from %s to %s"), $old_shift["name"], $new_shift["name"]) . "\n";
        $noticable_changes = true;
    }

    if ($old_shift["title"] != $new_shift["title"]) {
        $message .= sprintf(_("* Shift title changed from %s to %s"), $old_shift["title"], $new_shift["title"]) . "\n";
        $noticable_changes = true;
    }

    if ($old_shift["start"] != $new_shift["start"]) {
        $message .= sprintf(
                _("* Shift Start changed from %s to %s"),
                date("Y-m-d H:i", $old_shift["start"]),
                date("Y-m-d H:i", $new_shift["start"])
            ) . "\n";
        $noticable_changes = true;
    }

    if ($old_shift["end"] != $new_shift["end"]) {
        $message .= sprintf(
                _("* Shift End changed from %s to %s"),
                date("Y-m-d H:i", $old_shift["end"]),
                date("Y-m-d H:i", $new_shift["end"])
            ) . "\n";
        $noticable_changes = true;
    }

    if ($old_shift["RID"] != $new_shift["RID"]) {
        $message .= sprintf(_("* Shift Location changed from %s to %s"), $old_room["Name"], $new_room["Name"]) . "\n";
        $noticable_changes = true;
    }

    if (!$noticable_changes) {
        // There are no changes worth sending an E-Mail
        return;
    }

    $message .= "\n";
    $message .= _("The updated Shift:") . "\n";

    $message .= $new_shift["name"] . "\n";
    $message .= $new_shift["title"] . "\n";
    $message .= date("Y-m-d H:i", $new_shift["start"]) . " - " . date("H:i", $new_shift["end"]) . "\n";
    $message .= $new_room["Name"] . "\n";

    foreach ($users as $user) {
        if ($user["email_shiftinfo"]) {
            engelsystem_email_to_user($user, '[engelsystem] ' . _("Your Shift has changed"), $message, true);
        }
    }
}

function mail_shift_delete($shift)
{
    $users = ShiftEntries_by_shift($shift["SID"]);
    $room = Room($shift["RID"]);

    $message = _("A Shift you are registered on was deleted:") . "\n";

    $message .= $shift["name"] . "\n";
    $message .= $shift["title"] . "\n";
    $message .= date("Y-m-d H:i", $shift["start"]) . " - " . date("H:i", $shift["end"]) . "\n";
    $message .= $room["Name"] . "\n";

    foreach ($users as $user) {
        if ($user["email_shiftinfo"]) {
            engelsystem_email_to_user($user, '[engelsystem] ' . _("Your Shift was deleted"), $message, true);
        }
    }
}

function mail_shift_assign($user, $shift)
{
    if ($user["email_shiftinfo"]) {
        $room = Room($shift["RID"]);

        $message = _("You have been assigned to a Shift:") . "\n";
        $message .= $shift["name"] . "\n";
        $message .= $shift["title"] . "\n";
        $message .= date("Y-m-d H:i", $shift["start"]) . " - " . date("H:i", $shift["end"]) . "\n";
        $message .= $room["Name"] . "\n";

        engelsystem_email_to_user($user, '[engelsystem] ' . _("Assigned to Shift"), $message, true);
    }
}

function mail_shift_removed($user, $shift)
{
    if ($user["email_shiftinfo"]) {
        $room = Room($shift["RID"]);

        $message = _("You have been removed from a Shift:") . "\n";
        $message .= $shift["name"] . "\n";
        $message .= $shift["title"] . "\n";
        $message .= date("Y-m-d H:i", $shift["start"]) . " - " . date("H:i", $shift["end"]) . "\n";
        $message .= $room["Name"] . "\n";

        engelsystem_email_to_user($user, '[engelsystem] ' . _("Removed from Shift"), $message, true);
    }
}