"use strict";

/* This script handles PMA Drag Drop Import, loaded only when configuration is enabled.*/

/**
 * Class to handle PMA Drag and Drop Import
 *      feature
 */
var DragDropImport = {
  /**
   * @var int, count of total uploads in this view
   */
  uploadCount: 0,

  /**
   * @var int, count of live uploads
   */
  liveUploadCount: 0,

  /**
   * @var string array, allowed extensions
   */
  allowedExtensions: ['sql', 'xml', 'ldi', 'mediawiki', 'shp'],

  /**
   * @var string array, allowed extensions for compressed files
   */
  allowedCompressedExtensions: ['gz', 'bz2', 'zip'],

  /**
   * @var obj array to store message returned by /import-status
   */
  importStatus: [],

  /**
   * Checks if any dropped file has valid extension or not
   *
   * @param file filename
   *
   * @return string, extension for valid extension, '' otherwise
   */
  getExtension: function getExtension(file) {
    var arr = file.split('.');
    var ext = arr[arr.length - 1]; // check if compressed

    if (jQuery.inArray(ext.toLowerCase(), DragDropImport.allowedCompressedExtensions) !== -1) {
      ext = arr[arr.length - 2];
    } // Now check for extension


    if (jQuery.inArray(ext.toLowerCase(), DragDropImport.allowedExtensions) !== -1) {
      return ext;
    }

    return '';
  },

  /**
   * Shows upload progress for different sql uploads
   *
   * @param: hash (string), hash for specific file upload
   * @param: percent (float), file upload percentage
   *
   * @return void
   */
  setProgress: function setProgress(hash, percent) {
    $('.pma_sql_import_status div li[data-hash="' + hash + '"]').children('progress').val(percent);
  },

  /**
   * Function to upload the file asynchronously
   *
   * @param formData FormData object for a specific file
   * @param hash hash of the current file upload
   *
   * @return void
   */
  sendFileToServer: function sendFileToServer(formData, hash) {
    var jqXHR = $.ajax({
      xhr: function xhr() {
        var xhrobj = $.ajaxSettings.xhr();

        if (xhrobj.upload) {
          xhrobj.upload.addEventListener('progress', function (event) {
            var percent = 0;
            var position = event.loaded || event.position;
            var total = event.total;

            if (event.lengthComputable) {
              percent = Math.ceil(position / total * 100);
            } // Set progress


            DragDropImport.setProgress(hash, percent);
          }, false);
        }

        return xhrobj;
      },
      url: 'index.php?route=/import',
      type: 'POST',
      contentType: false,
      processData: false,
      cache: false,
      data: formData,
      success: function success(data) {
        DragDropImport.importFinished(hash, false, data.success);

        if (!data.success) {
          DragDropImport.importStatus[DragDropImport.importStatus.length] = {
            hash: hash,
            message: data.error
          };
        }
      }
    }); // -- provide link to cancel the upload

    $('.pma_sql_import_status div li[data-hash="' + hash + '"] span.filesize').html('<span hash="' + hash + '" class="pma_drop_file_status" task="cancel">' + Messages.dropImportMessageCancel + '</span>'); // -- add event listener to this link to abort upload operation

    $('.pma_sql_import_status div li[data-hash="' + hash + '"] span.filesize span.pma_drop_file_status').on('click', function () {
      if ($(this).attr('task') === 'cancel') {
        jqXHR.abort();
        $(this).html('<span>' + Messages.dropImportMessageAborted + '</span>');
        DragDropImport.importFinished(hash, true, false);
      } else if ($(this).children('span').html() === Messages.dropImportMessageFailed) {
        // -- view information
        var $this = $(this);
        $.each(DragDropImport.importStatus, function (key, value) {
          if (value.hash === hash) {
            $('.pma_drop_result:visible').remove();
            var filename = $this.parent('span').attr('data-filename');
            $('body').append('<div class="pma_drop_result"><h2>' + Messages.dropImportImportResultHeader + ' - ' + filename + '<span class="close">x</span></h2>' + value.message + '</div>');
            $('.pma_drop_result').draggable(); // to make this dialog draggable
          }
        });
      }
    });
  },

  /**
   * Triggered when an object is dragged into the PMA UI
   *
   * @param event obj
   *
   * @return void
   */
  dragEnter: function dragEnter(event) {
    // We don't want to prevent users from using
    // browser's default drag-drop feature on some page(s)
    if ($('.noDragDrop').length !== 0) {
      return;
    }

    event.stopPropagation();
    event.preventDefault();

    if (!DragDropImport.hasFiles(event)) {
      return;
    }

    if (CommonParams.get('db') === '') {
      $('.pma_drop_handler').html(Messages.dropImportSelectDB);
    } else {
      $('.pma_drop_handler').html(Messages.dropImportDropFiles);
    }

    $('.pma_drop_handler').fadeIn();
  },

  /**
   * Check if dragged element contains Files
   *
   * @param event the event object
   *
   * @return bool
   */
  hasFiles: function hasFiles(event) {
    return !(typeof event.originalEvent.dataTransfer.types === 'undefined' || $.inArray('Files', event.originalEvent.dataTransfer.types) < 0 || $.inArray('application/x-moz-nativeimage', event.originalEvent.dataTransfer.types) >= 0);
  },

  /**
   * Triggered when dragged file is being dragged over PMA UI
   *
   * @param event obj
   *
   * @return void
   */
  dragOver: function dragOver(event) {
    // We don't want to prevent users from using
    // browser's default drag-drop feature on some page(s)
    if ($('.noDragDrop').length !== 0) {
      return;
    }

    event.stopPropagation();
    event.preventDefault();

    if (!DragDropImport.hasFiles(event)) {
      return;
    }

    $('.pma_drop_handler').fadeIn();
  },

  /**
   * Triggered when dragged objects are left
   *
   * @param event obj
   *
   * @return void
   */
  dragLeave: function dragLeave(event) {
    // We don't want to prevent users from using
    // browser's default drag-drop feature on some page(s)
    if ($('.noDragDrop').length !== 0) {
      return;
    }

    event.stopPropagation();
    event.preventDefault();
    var $dropHandler = $('.pma_drop_handler');
    $dropHandler.clearQueue().stop();
    $dropHandler.fadeOut();
    $dropHandler.html(Messages.dropImportDropFiles);
  },

  /**
   * Called when upload has finished
   *
   * @param string, unique hash for a certain upload
   * @param bool, true if upload was aborted
   * @param bool, status of sql upload, as sent by server
   *
   * @return void
   */
  importFinished: function importFinished(hash, aborted, status) {
    $('.pma_sql_import_status div li[data-hash="' + hash + '"]').children('progress').hide();
    var icon = 'icon ic_s_success'; // -- provide link to view upload status

    if (!aborted) {
      if (status) {
        $('.pma_sql_import_status div li[data-hash="' + hash + '"] span.filesize span.pma_drop_file_status').html('<span>' + Messages.dropImportMessageSuccess + '</a>');
      } else {
        $('.pma_sql_import_status div li[data-hash="' + hash + '"] span.filesize span.pma_drop_file_status').html('<span class="underline">' + Messages.dropImportMessageFailed + '</a>');
        icon = 'icon ic_s_error';
      }
    } else {
      icon = 'icon ic_s_notice';
    }

    $('.pma_sql_import_status div li[data-hash="' + hash + '"] span.filesize span.pma_drop_file_status').attr('task', 'info'); // Set icon

    $('.pma_sql_import_status div li[data-hash="' + hash + '"]').prepend('<img src="./themes/dot.gif" title="finished" class="' + icon + '"> '); // Decrease liveUploadCount by one

    $('.pma_import_count').html(--DragDropImport.liveUploadCount);

    if (!DragDropImport.liveUploadCount) {
      $('.pma_sql_import_status h2 .close').fadeIn();
    }
  },

  /**
   * Triggered when dragged objects are dropped to UI
   * From this function, the AJAX Upload operation is initiated
   *
   * @param event object
   *
   * @return void
   */
  drop: function drop(event) {
    // We don't want to prevent users from using
    // browser's default drag-drop feature on some page(s)
    if ($('.noDragDrop').length !== 0) {
      return;
    }

    var dbname = CommonParams.get('db');
    var server = CommonParams.get('server'); // if no database is selected -- no

    if (dbname !== '') {
      var files = event.originalEvent.dataTransfer.files;

      if (!files || files.length === 0) {
        // No files actually transferred
        $('.pma_drop_handler').fadeOut();
        event.stopPropagation();
        event.preventDefault();
        return;
      }

      $('.pma_sql_import_status').slideDown();

      for (var i = 0; i < files.length; i++) {
        var ext = DragDropImport.getExtension(files[i].name);
        var hash = AJAX.hash(++DragDropImport.uploadCount);
        var $sqlImportStatusDiv = $('.pma_sql_import_status div');
        $sqlImportStatusDiv.append('<li data-hash="' + hash + '">' + (ext !== '' ? '' : '<img src="./themes/dot.gif" title="invalid format" class="icon ic_s_notice"> ') + Functions.escapeHtml(files[i].name) + '<span class="filesize" data-filename="' + Functions.escapeHtml(files[i].name) + '">' + (files[i].size / 1024).toFixed(2) + ' kb</span></li>'); // scroll the UI to bottom

        $sqlImportStatusDiv.scrollTop($sqlImportStatusDiv.scrollTop() + 50); // 50 hardcoded for now

        if (ext !== '') {
          // Increment liveUploadCount by one
          $('.pma_import_count').html(++DragDropImport.liveUploadCount);
          $('.pma_sql_import_status h2 .close').fadeOut();
          $('.pma_sql_import_status div li[data-hash="' + hash + '"]').append('<br><progress max="100" value="2"></progress>'); // uploading

          var fd = new FormData();
          fd.append('import_file', files[i]);
          fd.append('noplugin', Math.random().toString(36).substring(2, 12));
          fd.append('db', dbname);
          fd.append('server', server);
          fd.append('token', CommonParams.get('token'));
          fd.append('import_type', 'database'); // todo: method to find the value below

          fd.append('MAX_FILE_SIZE', '4194304'); // todo: method to find the value below

          fd.append('charset_of_file', 'utf-8'); // todo: method to find the value below

          fd.append('allow_interrupt', 'yes');
          fd.append('skip_queries', '0');
          fd.append('format', ext);
          fd.append('sql_compatibility', 'NONE');
          fd.append('sql_no_auto_value_on_zero', 'something');
          fd.append('ajax_request', 'true');
          fd.append('hash', hash); // init uploading

          DragDropImport.sendFileToServer(fd, hash);
        } else if (!DragDropImport.liveUploadCount) {
          $('.pma_sql_import_status h2 .close').fadeIn();
        }
      }
    }

    $('.pma_drop_handler').fadeOut();
    event.stopPropagation();
    event.preventDefault();
  }
};
/**
 * Called when some user drags, dragover, leave
 *       a file to the PMA UI
 * @param object Event data
 * @return void
 */

$(document).on('dragenter', DragDropImport.dragEnter);
$(document).on('dragover', DragDropImport.dragOver);
$(document).on('dragleave', '.pma_drop_handler', DragDropImport.dragLeave); // when file is dropped to PMA UI

$(document).on('drop', 'body', DragDropImport.drop); // minimizing-maximizing the sql ajax upload status

$(document).on('click', '.pma_sql_import_status h2 .minimize', function () {
  if ($(this).attr('toggle') === 'off') {
    $('.pma_sql_import_status div').css('height', '270px');
    $(this).attr('toggle', 'on');
    $(this).html('-'); // to minimize
  } else {
    $('.pma_sql_import_status div').css('height', '0px');
    $(this).attr('toggle', 'off');
    $(this).html('+'); // to maximise
  }
}); // closing sql ajax upload status

$(document).on('click', '.pma_sql_import_status h2 .close', function () {
  $('.pma_sql_import_status').fadeOut(function () {
    $('.pma_sql_import_status div').html('');
    DragDropImport.importStatus = []; // clear the message array
  });
}); // Closing the import result box

$(document).on('click', '.pma_drop_result h2 .close', function () {
  $(this).parent('h2').parent('div').remove();
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