synchronize.phtml

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<?php
// @codingStandardsIgnoreFile

?>

<?php /* @var $block \Magento\MediaStorage\Block\System\Config\System\Storage\Media\Synchronize */ ?>

<script>
require([
    'jquery',
    'prototype',
    'mage/backend/validation',
    'jquery/validate'
], function(jQuery){

    allowedStorages = [],
    getConnectionName = function (storageType, connection) {
        if (storageType == 0) {
            return storageType;
        } else if (connection != '') {
            return storageType + '_' + connection;
        }

        return '';
    };

    addAllowedStorage(
        $('system_media_storage_configuration_media_storage').value,
        $('system_media_storage_configuration_media_database').value
    );

    <?php $syncStorageParams = $block->getSyncStorageParams() ?>
    addAllowedStorage(<?= /* @escapeNotVerified */ $syncStorageParams['storage_type'] ?>, '<?= /* @escapeNotVerified */ $syncStorageParams['connection_name'] ?>');

    defaultValues   = [];
    defaultValues['system_media_storage_configuration_media_storage']   = $('system_media_storage_configuration_media_storage').value;
    defaultValues['system_media_storage_configuration_media_database']  = $('system_media_storage_configuration_media_database').value;


    function addAllowedStorage(storageType, connection)
    {
        storage = getConnectionName(storageType, connection);

        if (storage != '' && !allowedStorages.include(storage)) {
            allowedStorages.push(storage);
        }
        $('system_media_storage_configuration_media_storage').value = storageType;
        $('system_media_storage_configuration_media_database').value = connection;
    }

    function checkButtonState(event) {
        var element = Event.element(event);

        defaultStorage = getConnectionName(
            defaultValues['system_media_storage_configuration_media_storage'],
            defaultValues['system_media_storage_configuration_media_database']
        );

        storage = getConnectionName(
            $('system_media_storage_configuration_media_storage').value,
            $('system_media_storage_configuration_media_database').value
        );
        if (defaultStorage != storage) {
            enableSyncButton();
        } else {
            disableSyncButton();
        }
    }

    function enableStorageSelection() {
        $('system_media_storage_configuration_media_storage').enable('enabled');
        $('system_media_storage_configuration_media_database').enable('enabled');
    }

    function disableStorageSelection() {
        $('system_media_storage_configuration_media_storage').disable('disabled');
        $('system_media_storage_configuration_media_database').disable('disabled');
    }

    function enableSyncButton() {
        Form.Element.enable('synchronize_button');
        $('synchronize_button').removeClassName('disabled');
    }

    function disableSyncButton() {
        Form.Element.disable('synchronize_button');
        $('synchronize_button').addClassName('disabled');
    }

    var checkStatus = function() {
        u = new Ajax.PeriodicalUpdater('', '<?= /* @escapeNotVerified */ $block->getAjaxStatusUpdateUrl() ?>', {
            method:     'get',
            frequency:  5,
            loaderArea: false,

            onSuccess: function(transport) {
                var response;

                try {
                    response = JSON.parse(transport.responseText);
                    if (response.state == '<?= /* @escapeNotVerified */ \Magento\MediaStorage\Model\File\Storage\Flag::STATE_RUNNING ?>'
                        && response.message
                    ) {
                        if ($('sync_span').hasClassName('no-display')) {
                            $('sync_span').removeClassName('no-display');
                            $('sync_message_span').update(response.message);
                        }
                    } else {
                        u.stop();
                        enableStorageSelection();
                        $('sync_span').addClassName('no-display');

                        if (response.state == '<?= /* @escapeNotVerified */ \Magento\MediaStorage\Model\File\Storage\Flag::STATE_FINISHED ?>') {
                            addAllowedStorage(
                                $('system_media_storage_configuration_media_storage').value,
                                $('system_media_storage_configuration_media_database').value
                            );
                        } else if (response.state == '<?= /* @escapeNotVerified */ \Magento\MediaStorage\Model\File\Storage\Flag::STATE_NOTIFIED ?>') {
                            if (response.has_errors) {
                                enableSyncButton();
                            } else {
                                addAllowedStorage(
                                    $('system_media_storage_configuration_media_storage').value,
                                    $('system_media_storage_configuration_media_database').value
                                );
                            }
                        }
                    }
                } catch (e) {
                    response = {};
                }
            }
        });
    };

    Event.observe(window, 'load', function(){
        disableStorageSelection();
        disableSyncButton();
        checkStatus();
    });
    $('system_media_storage_configuration_media_storage').observe('change', checkButtonState);
    $('system_media_storage_configuration_media_database').observe('change', checkButtonState);

    jQuery('#synchronize_button').click(function () {
        if (!jQuery.validator.validateElement('#synchronize-validation-input')) {
            jQuery('[for="synchronize-validation-input"]').hide();
        }
        params = {
            storage:    $('system_media_storage_configuration_media_storage').value,
            connection: $('system_media_storage_configuration_media_database').value
        };

        new Ajax.Request('<?= /* @escapeNotVerified */ $block->getAjaxSyncUrl() ?>', {
            parameters:     params,
            loaderArea:     false,
            asynchronous:   true
        });

        window.setTimeout(checkStatus, 2011);

        disableStorageSelection();
        disableSyncButton();
    });

    jQuery.validator.addMethod('required-synchronize', function(){
        storage = getConnectionName(
            $('system_media_storage_configuration_media_storage').value,
            $('system_media_storage_configuration_media_database').value
        );
        return allowedStorages.include(storage);
    }, 'Synchronization is required.');
});
</script>

<?= $block->getButtonHtml() ?>
<span class="sync-indicator no-display" id="sync_span">
    <img alt="Synchronize" style="margin:0 5px" src="<?= /* @escapeNotVerified */ $block->getViewFileUrl('images/process_spinner.gif') ?>"/>
    <span id="sync_message_span"></span>
</span>
<input type="hidden" id="synchronize-validation-input" class="required-synchronize no-display"/>