<?php

class MailsterManage {

	private $integrations = array();

	public function __construct() {

		add_action( 'admin_menu', array( &$this, 'add_menu' ), 40 );

		add_action( 'wp_ajax_mailster_import_handler', array( &$this, 'import_handler' ) );
		add_action( 'wp_ajax_mailster_get_import_data', array( &$this, 'ajax_get_import_data' ) );
		add_action( 'wp_ajax_mailster_do_import', array( &$this, 'ajax_do_import' ) );
		add_action( 'wp_ajax_mailster_export_contacts', array( &$this, 'ajax_export_contacts' ) );
		add_action( 'wp_ajax_mailster_do_export', array( &$this, 'ajax_do_export' ) );
		add_action( 'wp_ajax_mailster_download_export_file', array( &$this, 'ajax_download_export_file' ) );
		add_action( 'wp_ajax_mailster_delete_contacts', array( &$this, 'ajax_delete_contacts' ) );
		add_action( 'wp_ajax_mailster_delete_delete_job', array( &$this, 'ajax_delete_delete_job' ) );

		add_action( 'mailster_import_method', array( &$this, 'display_import_method' ) );
		add_action( 'admin_init', array( &$this, 'admin_enqueue_scripts' ) );

		add_action( 'admin_init', array( &$this, 'load_integrations' ), 10 );

		add_action( 'mailster_cron_cleanup', array( &$this, 'delete_job' ) );
		add_action( 'mailster_cron_cleanup', array( &$this, 'empty_trash' ) );
	}


	public function load_integrations() {

		$importer = apply_filters(
			'mailster_importer',
			array(
				'MailsterImportUpload'    => MAILSTER_DIR . 'classes/manage.import.upload.php',
				'MailsterImportPaste'     => MAILSTER_DIR . 'classes/manage.import.paste.php',
				'MailsterImportWordPress' => MAILSTER_DIR . 'classes/manage.import.wordpress.php',
			)
		);

		include_once MAILSTER_DIR . 'classes/manage.import.abstract.php';

		foreach ( $importer as $classname => $path ) {
			if ( file_exists( $path ) ) {
				include_once $path;
				$integration_class = new $classname();

				$this->integrations[ $integration_class->get_type() ] = $integration_class;
			}
		}
	}



	public function admin_enqueue_scripts() {

		$suffix = SCRIPT_DEBUG ? '' : '.min';

		wp_register_script( 'mailster-manage-script', MAILSTER_URI . 'assets/js/manage-script' . $suffix . '.js', array( 'mailster-import-script', 'mailster-export-script', 'mailster-delete-script' ), MAILSTER_VERSION, true );

		wp_register_script( 'mailster-import-script', MAILSTER_URI . 'assets/js/import-script' . $suffix . '.js', array( 'mailster-script', 'plupload-all', 'thickbox' ), MAILSTER_VERSION, true );
		wp_register_script( 'mailster-export-script', MAILSTER_URI . 'assets/js/export-script' . $suffix . '.js', array( 'mailster-script', 'jquery-ui-sortable', 'jquery-touch-punch' ), MAILSTER_VERSION, true );
		wp_register_script( 'mailster-delete-script', MAILSTER_URI . 'assets/js/delete-script' . $suffix . '.js', array( 'mailster-script' ), MAILSTER_VERSION, true );

		wp_register_style( 'mailster-manage-style', MAILSTER_URI . 'assets/css/manage-style' . $suffix . '.css', array( 'mailster-import-style', 'mailster-export-style', 'mailster-delete-style' ), MAILSTER_VERSION );

		wp_register_style( 'mailster-import-style', MAILSTER_URI . 'assets/css/import-style' . $suffix . '.css', array( 'thickbox' ), MAILSTER_VERSION );
		wp_register_style( 'mailster-export-style', MAILSTER_URI . 'assets/css/export-style' . $suffix . '.css', array(), MAILSTER_VERSION );
		wp_register_style( 'mailster-delete-style', MAILSTER_URI . 'assets/css/delete-style' . $suffix . '.css', array(), MAILSTER_VERSION );
	}


	public function add_menu() {

		$page = add_submenu_page( 'edit.php?post_type=newsletter', esc_html__( 'Manage Subscribers', 'mailster' ), esc_html__( 'Manage Subscribers', 'mailster' ), 'mailster_manage_subscribers', 'mailster_manage_subscribers', array( &$this, 'subscriber_manage' ) );
		add_action( 'load-' . $page, array( &$this, 'scripts_styles' ) );
	}


	public function scripts_styles() {

		$suffix = SCRIPT_DEBUG ? '' : '.min';

		wp_enqueue_script( 'mailster-manage-script' );

		global $wp_locale;

		mailster_localize_script(
			'conditions',
			array(
				'next'          => esc_html__( 'next', 'mailster' ),
				'prev'          => esc_html__( 'prev', 'mailster' ),
				'start_of_week' => get_option( 'start_of_week' ),
				'day_names'     => $wp_locale->weekday,
				'day_names_min' => array_values( $wp_locale->weekday_abbrev ),
				'month_names'   => array_values( $wp_locale->month ),
			)
		);
		mailster_localize_script(
			'manage',
			array(
				'select_status'        => esc_html__( 'Please select the status for the importing contacts!', 'mailster' ),
				'select_emailcolumn'   => esc_html__( 'Please select at least the column with the email addresses!', 'mailster' ),
				'import_imported'      => esc_html__( '%1$s of %2$s imported', 'mailster' ),
				'import_errors'        => esc_html__( '%s errors', 'mailster' ),
				'continues_in'         => esc_html__( 'Continues in %s seconds', 'mailster' ),
				'error_importing'      => esc_html__( 'There was a problem during importing contacts. Please check the error logs for more information!', 'mailster' ),
				'prepare_download'     => esc_html__( 'Preparing Download for %1$s Subscribers...%2$s', 'mailster' ),
				'write_file'           => esc_html__( 'Writing file: %1$s (%2$s)', 'mailster' ),
				'export_finished'      => esc_html__( 'Export finished', 'mailster' ),
				'downloading'          => esc_html__( 'Downloading %s Subscribers...', 'mailster' ),
				'error_export'         => esc_html__( 'There was an error while exporting', 'mailster' ),
				'confirm_import'       => esc_html__( 'Do you really like to import these contacts?', 'mailster' ),
				'cancel_import'        => esc_html__( 'Do you really like to cancel this import?', 'mailster' ),
				'import_complete'      => esc_html__( 'Import complete!', 'mailster' ),
				'define_custom_field'  => esc_html__( 'Give you custom field a name', 'mailster' ),
				'my_custom_field'      => esc_html__( 'My Custom Field', 'mailster' ),
				'choose_tags'          => esc_html__( 'Choose your tags.', 'mailster' ),
				'confirm_delete'       => esc_html__( 'You are about to delete these subscribers permanently. This step is irreversible!', 'mailster' ) . "\n" . sprintf( esc_html__( 'Type %s to confirm deletion', 'mailster' ), '"DELETE"' ),
				'confirm_job'          => esc_html__( 'Please define a name for this job!', 'mailster' ),
				'confirm_job_delete'   => esc_html__( 'Do you like to delete this job?', 'mailster' ),
				'confirm_job_default'  => esc_html__( 'Job #%s', 'mailster' ),
				'export_n_subscribers' => esc_html__( 'Export %s Subscribers', 'mailster' ),
				'list_required'        => esc_html__( 'Select at least one list!', 'mailster' ),
				'status_required'      => esc_html__( 'Select at least one status!', 'mailster' ),
				'delete_n_subscribers' => esc_html__( 'Delete %s Subscribers permanently', 'mailster' ),
				'onbeforeunloadimport' => esc_html__( 'You are currently importing subscribers! If you leave the page all pending subscribers don\'t get imported!', 'mailster' ),
				'onbeforeunloadexport' => esc_html__( 'Your download is preparing! If you leave this page the progress will abort!', 'mailster' ),
				'import_contacts'      => esc_html__( 'Importing Contacts...%s', 'mailster' ),
				'prepare_import'       => esc_html__( 'Preparing Import...', 'mailster' ),
				'prepare_data'         => esc_html__( 'Preparing Data', 'mailster' ),
				'uploading'            => esc_html__( 'Uploading...%s', 'mailster' ),
			)
		);

		wp_enqueue_style( 'mailster-select2', MAILSTER_URI . 'assets/css/libs/select2' . $suffix . '.css', array(), MAILSTER_VERSION );
		wp_enqueue_style( 'mailster-select2-theme', MAILSTER_URI . 'assets/css/select2' . $suffix . '.css', array( 'mailster-select2' ), MAILSTER_VERSION );
		wp_enqueue_script( 'mailster-select2', MAILSTER_URI . 'assets/js/libs/select2' . $suffix . '.js', array( 'jquery' ), MAILSTER_VERSION, true );

		wp_enqueue_style( 'mailster-manage-style' );
	}


	public function subscriber_manage() {

		include MAILSTER_DIR . 'views/manage.php';
	}




	public function import_handler( $type = null ) {

		$type       = isset( $_POST['type'] ) ? basename( $_POST['type'] ) : $type;
		$identifier = isset( $_POST['identifier'] ) ? basename( $_POST['identifier'] ) : uniqid();

		$integration = $this->integrations[ $type ];

		$integration->valid_credentials();

		$import_data = $this->integrations[ $type ]->get_import_data();

		if ( is_wp_error( $import_data ) ) {
			$return['msg'] = $import_data->get_error_message();
			wp_send_json_error( $return );
			exit;
		}

		if ( ! isset( $import_data['sample'] ) || empty( $import_data['sample'] ) ) {
			$return['msg'] = esc_html__( 'Your selection doesn\'t contain any subscriber', 'mailster' );
			wp_send_json_error( $return );
			exit;
		}

		$import_data = wp_parse_args(
			$import_data,
			array(
				'header'    => null,
				'removed'   => 0,
				'extra_map' => array(),
				'defaults'  => array(),
			)
		);

		$import_data['type']       = $type;
		$import_data['identifier'] = $identifier;
		$import_data['page']       = 1;

		$import_data['defaults'] = wp_parse_args(
			$import_data['defaults'],
			array(
				'status'      => 1,
				'existing'    => 'skip',
				'signup'      => true,
				'performance' => false,
			)
		);

		set_transient( '_mailster_bulk_import_' . $identifier, $import_data, DAY_IN_SECONDS );

		$user_data = $this->integrations[ $type ]->get_import_data();

		update_user_option(
			get_current_user_id(),
			'mailster_import_settings',
			array(
				'method' => $type,
			)
		);

		$return['identifier'] = $identifier;

		wp_send_json_success( $return );
	}


	public function ajax_get_import_data() {

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_import_subscribers' ) ) {

			wp_send_json_error( $return );
		}

		$return['identifier'] = $identifier = $_POST['identifier'];

		$import_data = get_transient( '_mailster_bulk_import_' . $identifier );
		$data        = $import_data['sample'];
		$first       = $data[0];
		$last        = end( $data );
		reset( $data );

		$firstline    = $first[0];
		$cols         = count( $first );
		$contactcount = $import_data['total'];
		$samplecount  = count( $data );
		$removed      = $import_data['removed'];
		$defaults     = $import_data['defaults'];
		$header       = is_array( $import_data['header'] ) ? array_values( $import_data['header'] ) : array();
		$map          = is_array( $import_data['header'] ) ? array_keys( $import_data['header'] ) : null;

		$custom_fields = mailster()->get_custom_fields();

		$fields     = array(
			'email'      => mailster_text( 'email' ),
			'firstname'  => mailster_text( 'firstname' ),
			'lastname'   => mailster_text( 'lastname' ),
			'first_last' => mailster_text( 'firstname' ) . '&#x23B5;' . mailster_text( 'lastname' ),
			'last_first' => mailster_text( 'lastname' ) . '&#x23B5;' . mailster_text( 'firstname' ),
		);
		$meta_dates = array(
			'_signup'         => esc_html__( 'Signup Date', 'mailster' ),
			'_confirm'        => esc_html__( 'Confirm Date', 'mailster' ),
			'_confirm_signup' => esc_html__( 'Signup + Confirm Date', 'mailster' ),
		);
		$meta_ips   = array(
			'_ip'                => esc_html__( 'IP Address', 'mailster' ),
			'_ip_signup'         => esc_html__( 'Signup IP Address', 'mailster' ),
			'_ip_confirm'        => esc_html__( 'Confirm IP Address', 'mailster' ),
			'_ip_confirm_signup' => esc_html__( 'Confirm + Signup IP Address', 'mailster' ),
			'_ip_all'            => esc_html__( 'all IP Addresses', 'mailster' ),
		);
		$meta_other = array(
			'_lists'      => esc_html__( 'Lists', 'mailster' ) . ' (' . esc_html__( 'comma separated', 'mailster' ) . ')',
			'_tags'       => esc_html__( 'Tags', 'mailster' ) . ' (' . esc_html__( 'comma separated', 'mailster' ) . ')',
			'_status'     => esc_html__( 'Status', 'mailster' ),
			'_lang'       => esc_html__( 'Language', 'mailster' ),
			'_timeoffset' => esc_html__( 'Timeoffset to UTC', 'mailster' ),
			'_timezone'   => esc_html__( 'Timezone', 'mailster' ),
			'_lat'        => esc_html__( 'Latitude', 'mailster' ),
			'_long'       => esc_html__( 'Longitude', 'mailster' ),
			'_country'    => esc_html__( 'Country', 'mailster' ),
			'_city'       => esc_html__( 'City', 'mailster' ),
		);

		$html  = '<form id="subscriber-table">';
		$html .= '<h2>';
		$html .= sprintf( esc_html__( _n( '%s contact to import.', '%s contacts to import.', $contactcount, 'mailster' ) ), number_format_i18n( $contactcount ) );
		$html .= mailster()->beacon( '63f5f51ee6d6615225472ab9' );
		if ( ! empty( $removed ) ) {
			$html .= ' <span class="howto">' . sprintf( esc_html__( _n( '%s entry without valid email address has been removed.', '%s entries without valid email address have been removed.', $removed, 'mailster' ) ), number_format_i18n( $removed ) ) . '</span>';
		}
		$html .= '</h2>';
		$html .= '<h4>' . esc_html__( 'Match column labels to contact information. Each column can represent one field. You can ignore columns which you like to skip.', 'mailster' ) . '</h4>';
		$html .= '<section>';
		// $html .= '<p class="howto">' . esc_html__( 'Match column labels to contact information. Each column can represent one field. You can ignore columns which you like to skip.', 'mailster' ) . '</p>';

		$html .= '<div class="table-wrap">';
		$html .= '<table class="wp-list-table widefat">';
		$html .= '<thead>';
		$html .= '<tr><td style="width:20px;">#</td>';
		for ( $i = 0; $i < $cols; $i++ ) {
			$select  = '<select name="_order[]" class="column-selector" data-for="' . ( ! empty( $header[ $i ] ) ? $header[ $i ] : '' ) . '">';
			$select .= '<option value="-1">' . esc_html__( 'Ignore column', 'mailster' ) . '</option>';
			$select .= '<option value="-1">----------</option>';
			$select .= '<option value="_new">' . esc_html__( 'Create new Field', 'mailster' ) . '</option>';
			$select .= '<option value="-1">----------</option>';
			$select .= '<optgroup label="' . esc_html__( 'Basic', 'mailster' ) . '">';
			foreach ( $fields as $key => $value ) {
				$is_selected = ( $map && $key === $map[ $i ] );

				$select .= '<option value="' . esc_attr( $key ) . '" ' . ( $is_selected ? 'selected' : '' ) . '>' . esc_html( $value ) . '</option>';
			}
			$select .= '</optgroup>';

			$select .= '<optgroup label="' . esc_html__( 'Custom Fields', 'mailster' ) . '" class="custom-fields-select">';
			foreach ( $custom_fields as $custom_field_key => $custom_fields_value ) {
				$select .= '<option value="' . esc_attr( $custom_field_key ) . '">' . $custom_fields_value['name'] . '</option>';
			}
			$select .= '</optgroup>';

			$select .= '<optgroup label="' . esc_html__( 'Time Options', 'mailster' ) . '">';
			foreach ( $meta_dates as $key => $value ) {
				$is_selected = $map && $key === $map[ $i ];
				$select     .= '<option value="' . esc_attr( $key ) . '" ' . ( $is_selected ? 'selected' : '' ) . '>' . esc_html( $value ) . '</option>';
			}
			$select .= '</optgroup>';
			$select .= '<optgroup label="' . esc_html__( 'IP Options', 'mailster' ) . '">';
			foreach ( $meta_ips as $key => $value ) {
				$is_selected = $map && $key === $map[ $i ];
				$select     .= '<option value="' . esc_attr( $key ) . '" ' . ( $is_selected ? 'selected' : '' ) . '>' . esc_html( $value ) . '</option>';
			}
			$select .= '</optgroup>';
			$select .= '<optgroup label="' . esc_html__( 'Other Meta', 'mailster' ) . '">';
			foreach ( $meta_other as $key => $value ) {
				$is_selected = $map && $key === $map[ $i ];
				$select     .= '<option value="' . esc_attr( $key ) . '" ' . ( $is_selected ? 'selected' : '' ) . '>' . esc_html( $value ) . '</option>';
			}
			$select   .= '</optgroup>';
			$select   .= '</select>';
				$html .= '<td>' . $select . '</td>';
		}
		$html .= '</tr>';
		if ( ! empty( $header ) ) {
			$html .= '<tr><td style="width:20px;">&nbsp;</td>';
			for ( $i = 0; $i < $cols; $i++ ) {
					$html .= '<td>' . esc_html( $header[ $i ] ) . '</td>';
			}
			$html .= '</tr>';
		}
		$html .= '</thead>';
		$html .= '<tbody>';
		for ( $i = 0; $i < min( $samplecount, $contactcount ); $i++ ) {
			$html .= '<tr class="' . ( $i % 2 ? '' : 'alternate' ) . '"><td>' . number_format_i18n( $i + 1 ) . '</td>';
			foreach ( $data[ $i ] as $j => $cell ) {
					$html .= '<td title="' . esc_attr( strip_tags( $cell ) ) . '">' . esc_html( $cell ) . '</td>';
			}
			$html .= '<tr>';
		}
		if ( $contactcount > $samplecount + 1 ) {
			$html .= '<tr class="' . ( $i++ % 2 ? '' : 'alternate' ) . '"><td>&nbsp;</td><td colspan="' . ( $cols ) . '"><i>&hellip;' . sprintf( esc_html__( '%s contacts are hidden', 'mailster' ), number_format_i18n( $contactcount - $samplecount - 1 ) ) . '&hellip;</i></td></tr>';

			if ( isset( $import_data['sample_last'] ) ) {
				$html .= '<tr class="' . ( $i++ % 2 ? '' : 'alternate' ) . '"><td>' . number_format_i18n( $contactcount ) . '</td>';
				foreach ( $import_data['sample_last'] as $cell ) {
					$html .= '<td title="' . esc_attr( strip_tags( $cell ) ) . '">' . esc_html( $cell ) . '</td>';
				}
				$html .= '</tr>';
			}
		} else {
			$html .= '<tr class="' . ( $i++ % 2 ? '' : 'alternate' ) . '"><td>&nbsp;</td><td colspan="' . ( $cols ) . '"><i>&hellip;' . sprintf( esc_html__( '%s total contacts', 'mailster' ), number_format_i18n( $contactcount ) ) . '&hellip;</i></td></tr>';
		}
		$html .= '</tbody>';
		$html .= '</table>';
		$html .= '</div>';
		$html .= '</section>';
		$html .= '<h4>' . esc_html__( 'Add contacts to following lists', 'mailster' ) . '</h4>';
		$html .= '<section id="section-lists">';
		$html .= '<p class="howto">' . esc_html__( 'Lists can also be matched above.', 'mailster' ) . '</p>';
		$html .= '<ul>';
		$lists = mailster( 'lists' )->get( null, null, true );
		if ( $lists && ! is_wp_error( $lists ) ) {
			foreach ( $lists as $list ) {
				$html .= '<li><label><input name="_lists[]" value="' . esc_attr( $list->name ) . '" type="checkbox"> ' . esc_html( $list->name ) . ' <span class="count">(' . number_format_i18n( $list->subscribers ) . ')</span></label></li>';
			}
		}
		$html .= '</ul>';
		$html .= '<p><label for="new_list_name">' . esc_html__( 'Add new list', 'mailster' ) . ': </label><input type="text" id="new_list_name" value=""> <button class="button" id="addlist">' . esc_html__( 'Add', 'mailster' ) . '</button></p>';

		$html .= '</section>';
		$html .= '<h4>' . esc_html__( 'Assign following tags to these contacts', 'mailster' ) . '</h4>';
		$html .= '<section id="section-tags">';
		$html .= '<p>';
		$html .= '<select multiple name="_tags[]" class="tags-input">';
		$html .= '<option></option>';
		$tags  = mailster( 'tags' )->get();
		foreach ( $tags as $tag ) :
			$html .= '<option value="' . esc_attr( $tag->ID ) . '">' . esc_html( $tag->name ) . '</option>';
		endforeach;
		$html .= '</select>';
		$html .= '</p>';

		$html    .= '</section>';
		$html    .= '<h4>' . esc_html__( 'Import as', 'mailster' ) . '</h4>';
		$html    .= '<section>';
		$html    .= '<p>';
		$statuses = mailster( 'subscribers' )->get_status( null, true );
		foreach ( $statuses as $i => $name ) {
			if ( in_array( $i, array( 4, 5 ) ) ) {
				continue;
			}

			$html .= '<label><input type="radio" name="status" value="' . (int) $i . '" ' . checked( $defaults['status'], $i, false ) . '> ' . esc_html( $name ) . ' </label>';
		}
		$html .= '</p>';
		$html .= '<p class="description">' . esc_html__( 'The status will be applied to contacts if no other is defined via the columns.', 'mailster' ) . '</p>';
		$html .= '<div class="pending-info error inline"><p><strong>' . esc_html__( 'Choosing "pending" as status will force a confirmation message to the subscribers.', 'mailster' ) . '</strong></p></div>';

		$html .= '</section>';
		$html .= '<h4>' . esc_html__( 'Existing subscribers', 'mailster' ) . '</h4>';
		$html .= '<section id="section-existing">';
		$html .= '<p>';
		$html .= '<label> <input type="radio" name="existing" value="skip" ' . checked( $defaults['existing'], 'skip', false ) . '> ' . esc_html__( 'skip', 'mailster' ) . '</label> &mdash; <span class="description">' . esc_html__( 'will skip the contact if the email address already exists. Status will not be changed.', 'mailster' ) . '</span><br>';
		$html .= '<label><input type="radio" name="existing" value="overwrite" ' . checked( $defaults['existing'], 'overwrite', false ) . '> ' . esc_html__( 'overwrite', 'mailster' ) . '</label> &mdash; <span class="description">' . esc_html__( 'will overwrite all values of the contact. Status will be overwritten.', 'mailster' ) . '</span><br>';
		$html .= '<label><input type="radio" name="existing" value="merge" ' . checked( $defaults['existing'], 'merge', false ) . '> ' . esc_html__( 'merge', 'mailster' ) . '</label> &mdash; <span class="description">' . esc_html__( 'will overwrite only defined values and keep old ones. Status will not be changed unless defined via the columns.', 'mailster' ) . '</span>';
		$html .= '</p>';
		$html .= '</section>';
		$html .= '<h4>' . esc_html__( 'Other', 'mailster' ) . '</h4>';
		$html .= '<section id="section-other">';
		$html .= '<p><label><input type="checkbox" id="signup" name="signup" ' . checked( $defaults['signup'], true, false ) . '>' . esc_html__( 'Use a signup date if not defined', 'mailster' ) . ': <input type="date" value="' . date( 'Y-m-d' ) . '" class="datepicker" id="signupdate" name="signupdate"></label>';
		$html .= '<br><span class="description">' . esc_html__( 'Some Auto responder require a signup date. Define it here if it is not set or missing', 'mailster' ) . '</span></p>';
		$html .= '<p><label><input type="checkbox" id="performance" name="performance" ' . checked( $defaults['performance'], true, false ) . '> ' . esc_html__( 'Low memory usage (slower)', 'mailster' ) . '</label></p>';
		$html .= '<input type="hidden" id="identifier" value="' . esc_attr( $identifier ) . '">';
		$html .= '</section>';
		$html .= '<section class="footer alternate">';

		$html .= '<p><input type="submit" class="do-import button button-primary" value="' . ( sprintf( _n( 'Import %s contact', 'Import %s contacts', $contactcount, 'mailster' ), number_format_i18n( $contactcount ) ) ) . '"><span class="status wp-ui-text-icon"></span></p>';
		$html .= '</section>';
		$html .= '</form>';

		$return['html'] = $html;

		wp_send_json_success( $return );
	}


	public function ajax_do_import() {

			define( 'MAILSTER_DO_BULKIMPORT', true );

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_import_subscribers' ) ) {
			wp_send_json_error( $return );
		}

		parse_str( $_POST['options']['data'], $import_options );

		$identifier        = $_POST['options']['identifier'];
		$canceled          = ! ! ( $_POST['canceled'] === 'true' );
		$new_custom_fields = isset( $_POST['options']['customfields'] ) ? (array) $_POST['options']['customfields'] : null;
		$imported          = 0;
		$errors            = 0;
		$import_data       = wp_parse_args(
			get_transient( '_mailster_bulk_import_' . $identifier ),
			array(
				'lists'       => isset( $import_options['_lists'] ) ? (array) $import_options['_lists'] : array(),
				'tags'        => isset( $import_options['_tags'] ) ? (array) $import_options['_tags'] : array(),
				'order'       => isset( $import_options['_order'] ) ? (array) $import_options['_order'] : array(),
				'signupdate'  => $import_options['signupdate'],
				'existing'    => $import_options['existing'],
				'status'      => $import_options['status'],
				'page'        => 1,
				'errors'      => 0,
				'imported'    => 0,
				'encoding'    => null,
				'performance' => ! ! ( $_POST['options']['performance'] === 'true' ),
			)
		);

		$memory_limit       = ini_get( 'memory_limit' );
		$max_execution_time = ini_get( 'max_execution_time' );

		ini_set( 'display_errors', 0 );

		mailster_set_time_limit( 0 );

		if ( (int) $max_execution_time < 300 ) {
			ini_set( 'max_execution_time', 300 );
		}
		if ( (int) $memory_limit < 256 ) {
			ini_set( 'memory_limit', '256M' );
		}

		if ( ! ( $erroremails = get_transient( '_mailster_bulk_import_errors_' . $identifier ) ) ) {
			$erroremails = array();
		}

		if ( ! $canceled ) {

			// get chunk of import based on the part section
			$parts = $this->integrations[ $import_data['type'] ]->get_import_part( $import_data );

			if ( $parts === $import_data ) {
				$return['msg'] = sprintf( esc_html__( 'No Integration for %s found.', 'mailster' ), $import_data['type'] );
				wp_send_json_error( $return );
				exit;
			}

			if ( is_wp_error( $parts ) ) {
				$return['msg'] = $parts->get_error_message();
				wp_send_json_error( $return );
				exit;
			}

			if ( ! empty( $new_custom_fields ) && 1 == $import_data['page'] ) {

				// is it used?
				$custom_fields = mailster()->get_custom_fields( true );

				$used = array_intersect( $import_data['order'], array_flip( $new_custom_fields ) );

				$used = array_values( array_diff( $used, $custom_fields ) );

				foreach ( $used as $id ) {
					mailster()->add_custom_field( $new_custom_fields[ $id ], null, null, null, $id );
				}
			}

			$option_list_ids = array();
			foreach ( $import_data['lists'] as $list ) {

				$list_id = mailster( 'lists' )->get_by_name( $list, 'ID' );

				if ( ! $list_id ) {
					$list_id = mailster( 'lists' )->add( $list );
					if ( is_wp_error( $list_id ) ) {
						continue;
					}
				}

				$option_list_ids[] = $list_id;
			}

			$option_tag_ids = array();
			foreach ( $import_data['tags'] as $tag ) {

				if ( is_numeric( $tag ) ) {
					$tag_id = mailster( 'tags' )->get( $tag );

				} else {
					$tag_id = mailster( 'tags' )->get_by_name( $tag, 'ID' );
				}

				if ( ! $tag_id ) {
					$tag_id = mailster( 'tags' )->add( $tag );
					if ( is_wp_error( $tag_id ) ) {
						continue;
					}
				} elseif ( isset( $tag_id->ID ) ) {
					$tag_id = $tag_id->ID;
				}

				$option_tag_ids[] = $tag_id;
			}

			$statusnames_nice = array_flip( mailster( 'subscribers' )->get_status( null, true ) );
			$statusnames      = array_flip( mailster( 'subscribers' )->get_status() );
			$timeoffset       = mailster( 'helper' )->gmt_offset( true );

			foreach ( $parts as $part ) {

				$list_array = array();
				$tag_array  = array();
				$list_ids   = $option_list_ids;
				$tag_ids    = $option_tag_ids;

				$data       = $part;
				$line_count = count( $data );

				$insert = array();
				$meta   = array();
				$geo    = array();
				$coords = array();

				// each column
				for ( $col = 0; $col < $line_count; $col++ ) {

					$d     = isset( $data[ $col ] ) ? trim( $data[ $col ] ) : null;
					$order = isset( $import_data['order'][ $col ] ) ? $import_data['order'][ $col ] : '-1';

					switch ( $order ) {

						case 'email':
							$insert[ $order ] = strtolower( $d );
							break;
						case '_signup':
						case '_confirm':
							if ( ! is_numeric( $d ) && ! empty( $d ) ) {
								$d = strtotime( $d );
							}

						case '_ip':
						case '_ip_signup':
						case '_ip_confirm':
						case '_lang':
							$insert[ substr( $order, 1 ) ] = $d;
							break;
						case '_status':
							if ( is_numeric( $d ) ) {
								$insert[ substr( $order, 1 ) ] = $d;
							} elseif ( is_string( $d ) && isset( $statusnames[ $d ] ) ) {
								$insert[ substr( $order, 1 ) ] = $statusnames[ $d ];
							} elseif ( is_string( $d ) && isset( $statusnames_nice[ $d ] ) ) {
								$insert[ substr( $order, 1 ) ] = $statusnames_nice[ $d ];
							}
							break;
						case '_lists':
							$list_array = explode( ',', $d );
							$list_array = array_map( 'trim', $list_array );

							break;
						case '_tags':
							$tag_array = explode( ',', $d );
							$tag_array = array_map( 'trim', $tag_array );

							break;
						case '_ip_all':
							$insert['ip'] = $d;
						case '_ip_confirm_signup':
							$insert['ip_signup']  = $d;
							$insert['ip_confirm'] = $d;
							break;
						case '_confirm_signup':
							if ( ! is_numeric( $d ) && ! empty( $d ) ) {
								$d = strtotime( $d );
							}
							$insert['signup']  = $d;
							$insert['confirm'] = $d;
							break;
						case '_timeoffset':
							$meta[ substr( $order, 1 ) ] = $d;
							break;
						case '_timezone':
							if ( $d ) {
								$offset             = mailster( 'helper' )->get_timezone_offset_by_string( $d );
								$meta['timeoffset'] = $offset;
							}
							break;
						case '_country':
							if ( $d ) {
								$geo[0] = $d;
								$geo[1] = isset( $geo[1] ) ? $geo[1] : '';
							}
							break;
						case '_city':
							if ( $d ) {
								$geo[1] = $d;
							}
							break;
						case '_long':
							if ( $d ) {
								$coords[0] = $d;
							}
							break;
						case '_lat':
							if ( $d ) {
								$coords[1] = $d;
							}
							break;
						case 'first_last':
							$split               = explode( ' ', $d );
							$insert['firstname'] = isset( $split[0] ) ? $split[0] : null;
							$insert['lastname']  = isset( $split[1] ) ? $split[1] : null;
							break;
						case 'last_first':
							$split               = explode( ' ', $d );
							$insert['firstname'] = isset( $split[1] ) ? $split[1] : null;
							$insert['lastname']  = isset( $split[0] ) ? $split[0] : null;
							break;
						case '-1':
						case '_new':
							// ignored column
							break;
						default:
							$insert[ $order ] = $d;
					}
				}

				if ( ! empty( $geo ) ) {
					$meta['geo'] = implode( '|', $geo );
				}
				if ( ! empty( $coords ) ) {
					$meta['coords'] = implode( '|', $coords );
				}

				if ( ! mailster_is_email( $insert['email'] ) ) {
					$erroremails[] = array(
						'email'  => $insert['email'],
						'reason' => esc_html__( 'Email address is invalid.', 'mailster' ),
					);
					++$errors;
					continue;
				}

				if ( ! isset( $insert['signup'] ) || empty( $insert['signup'] ) ) {
					$insert['signup'] = $import_data['signupdate'] ? strtotime( $import_data['signupdate'] ) - $timeoffset : 0;
				}

				if ( empty( $insert['signup'] ) && 'merge' == $import_data['existing'] ) {
					unset( $insert['signup'] );
				}

				if ( ! isset( $insert['confirm'] ) ) {
					$insert['confirm'] = 0;
				}

				$insert = $this->integrations[ $import_data['type'] ]->filter( $insert, $part, $import_data );

				switch ( $import_data['existing'] ) {
					case 'merge':
						if ( $exists = mailster( 'subscribers' )->get_by_mail( $insert['email'] ) ) {

							$insert['ID'] = $exists->ID;
							if ( ! isset( $insert['status'] ) ) {
								$insert['status'] = $exists->status;
							}
							$subscriber_id = mailster( 'subscribers' )->update( $insert, true );

						} else {

							if ( ! isset( $insert['status'] ) ) {
								$insert['status'] = $import_data['status'];
							}

							$subscriber_id = mailster( 'subscribers' )->add( $insert, false );
						}

						break;
					case 'overwrite':
						if ( ! isset( $insert['status'] ) ) {
							$insert['status'] = $import_data['status'];
						}
						$subscriber_id = mailster( 'subscribers' )->add( $insert, true );
						break;
					case 'skip':
						if ( ! isset( $insert['status'] ) ) {
							$insert['status'] = $import_data['status'];
						}
						$subscriber_id = mailster( 'subscribers' )->add( $insert, false );
						break;
				}

				if ( is_wp_error( $subscriber_id ) ) {
					$erroremails[] = array(
						'email'  => $insert['email'],
						'reason' => $subscriber_id->get_error_message(),
					);
					++$errors;
					continue;
				}
				foreach ( $list_array as $list ) {

					if ( empty( $list ) ) {
						continue;
					}

					if ( isset( $list_cache[ $list ] ) ) {
						$list_id = $list_cache[ $list ];
					} else {
						$list_id = mailster( 'lists' )->get_by_name( $list, 'ID' );
					}

					if ( ! $list_id ) {
						$list_id = mailster( 'lists' )->add( $list );
						if ( is_wp_error( $list_id ) ) {
							continue;
						}
						$list_cache[ $list ] = $list_id;
					}

					$list_ids[] = $list_id;

				}

				if ( ! empty( $list_ids ) ) {
					$list_ids = array_unique( $list_ids );
					$added    = null;
					if ( $insert['status'] != 0 ) {
						$added = isset( $insert['signup'] ) ? $insert['signup'] : time();
					}

					if ( $import_data['existing'] == 'overwrite' ) {

						$current_lists = mailster( 'subscribers' )->get_lists( $subscriber_id, true );
						// get only the new ones
						$diff_lists = array_diff( $list_ids, $current_lists );
						// get the ones which are not in the new list
						$to_remove = array_diff( $current_lists, $list_ids );

						mailster( 'subscribers' )->unassign_lists( $subscriber_id, $to_remove );

					}
					$remove_old = false;
					mailster( 'subscribers' )->assign_lists( $subscriber_id, $list_ids, $remove_old, $added );
				}

				foreach ( $tag_array as $tag ) {

					if ( empty( $tag ) ) {
						continue;
					}

					if ( isset( $tag_cache[ $tag ] ) ) {
						$tag_id = $tag_cache[ $tag ];
					} else {
						$tag_id = mailster( 'tags' )->get_by_name( $tag, 'ID' );
					}

					if ( ! $tag_id ) {
						$tag_id = mailster( 'tags' )->add( $tag );
						if ( is_wp_error( $tag_id ) ) {
							continue;
						}
						$tag_cache[ $tag ] = $tag_id;
					}

					$tag_ids[] = $tag_id;

				}

				if ( ! empty( $tag_ids ) ) {
					$tag_ids = array_unique( $tag_ids );
					if ( $import_data['existing'] == 'overwrite' ) {
						mailster( 'subscribers' )->clear_tags( $subscriber_id );
					}
					mailster( 'subscribers' )->assign_tags( $subscriber_id, $tag_ids );
				}

				mailster( 'subscribers' )->update_meta( $subscriber_id, 0, $meta );

				++$imported;

			}
		}

		$import_data['imported'] += $imported;
		$import_data['errors']   += $errors;

		$return['memoryusage']   = size_format( memory_get_peak_usage( true ), 2 );
		$return['errors']        = $import_data['errors'];
		$return['errors_turn']   = $errors;
		$return['imported']      = $import_data['imported'];
		$return['imported_turn'] = $imported;
		$return['total']         = $import_data['total'];
		$return['p']             = ( $import_data['imported'] ) / $import_data['total'];
		$return['p_total']       = ( $import_data['imported'] + $import_data['errors'] ) / $import_data['total'];
		$return['f_p']           = round( $return['p'] * 100, 1 );
		$return['f_errors']      = number_format_i18n( $import_data['errors'] );
		$return['f_imported']    = number_format_i18n( $import_data['imported'] );
		$return['f_total']       = number_format_i18n( $import_data['total'] );
		$return['canceled']      = $canceled;

		$return['html'] = '';

		if ( $canceled || $import_data['imported'] + $import_data['errors'] >= $import_data['total'] ) {
			$return['html'] .= '<h2>';
			$return['html'] .= sprintf( esc_html__( '%1$s of %2$s contacts imported.', 'mailster' ), '<strong>' . number_format_i18n( $import_data['imported'] ) . '</strong>', '<strong>' . number_format_i18n( $import_data['total'] ) . '</strong>' ) . ' (' . ( $return['f_p'] ) . '%)';
			if ( $canceled ) {
				$return['html'] .= '<span class="howto">' . sprintf( esc_html__( '%s contacts were skipped because you\'ve canceled the import.', 'mailster' ), '<strong>' . number_format_i18n( $import_data['total'] - $import_data['imported'] ) . '</strong>' ) . '</span>';
			}

			$return['html'] .= '</h2>';

			if ( $import_data['errors'] ) {
				$return['html'] .= '<h4>' . sprintf( esc_html__( 'Following %s contacts were not imported', 'mailster' ), count( $erroremails ) ) . '</h4>';
				$return['html'] .= '<section>';
				$return['html'] .= '<div class="table-wrap">';
				$return['html'] .= '<table class="wp-list-table widefat">';
				$return['html'] .= '<thead><tr><td width="5%">#</td><td>' . mailster_text( 'email' ) . '</td><td>' . esc_html__( 'Reason', 'mailster' ) . '</td></tr></thead><tbody>';
				foreach ( $erroremails as $i => $contacts ) {
					$return['html'] .= '<tr' . ( $i % 2 ? '' : ' class="alternate"' ) . '><td>' . ( ++$i ) . '</td><td>' . esc_html( $contacts['email'] ) . '</td><td>' . esc_html( $contacts['reason'] ) . '</td></tr></thead>';
				}
				$return['html'] .= '</tbody></table>';
				$return['html'] .= '</div>';
				$return['html'] .= '</section>';
			}

			$return['html'] .= '<section>';
			$return['html'] .= '<a href="' . admin_url( 'edit.php?post_type=newsletter&page=mailster_manage_subscribers&tab=import' ) . '" class="button button-primary">' . esc_html__( 'Import more Contacts', 'mailster' ) . '</a> ';
			$return['html'] .= '<a href="' . admin_url( 'edit.php?post_type=newsletter&page=mailster_subscribers' ) . '" class="button">' . esc_html__( 'View your Subscribers', 'mailster' ) . '</a>';
			$return['html'] .= '</section>';

			delete_transient( '_mailster_bulk_import' . $identifier );
			delete_transient( '_mailster_bulk_import_errors_' . $identifier );
			$return['wpusers'] = mailster( 'subscribers' )->wp_id();

		} else {

			// increase this for the next batch
			++$import_data['page'];

			set_transient( '_mailster_bulk_import_' . $identifier, $import_data, DAY_IN_SECONDS );
			set_transient( '_mailster_bulk_import_errors_' . $identifier, $erroremails, DAY_IN_SECONDS );

		}

		wp_send_json_success( $return );
	}


	public function ajax_export_contacts() {

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_export_subscribers' ) ) {
			$return['msg'] = esc_html__( 'You are not allowed to export subscribers!', 'mailster' );
			wp_send_json_error( $return );
		}

		wp_parse_str( $_POST['data'], $post_data );

		$listids  = isset( $post_data['lists'] ) ? array_filter( $post_data['lists'], 'is_numeric' ) : array();
		$statuses = isset( $post_data['status'] ) ? array_filter( $post_data['status'], 'is_numeric' ) : array();

		$conditions = false;
		if ( isset( $_POST['conditions'] ) ) {
			wp_parse_str( $_POST['conditions'], $conditions );
			if ( isset( $conditions['conditions'] ) ) {
				$conditions = $conditions['conditions'];
			}
		}

		$args = array(
			'lists'      => $listids,
			'status'     => $statuses,
			'conditions' => $conditions,
			'return_ids' => true,
		);

		$args = apply_filters( 'mailster_export_args', $args, $post_data );

		$data = mailster( 'subscribers' )->query( $args );

		if ( isset( $post_data['nolists'] ) && $post_data['nolists'] ) {

			$args['lists'] = -1;
			$data2         = mailster( 'subscribers' )->query( $args );

			$data = array_unique( array_merge( $data, $data2 ) );

		}

		$return['count'] = count( $data );

		if ( $return['count'] ) {

			if ( ! is_dir( MAILSTER_UPLOAD_DIR ) ) {
				wp_mkdir_p( MAILSTER_UPLOAD_DIR );
			}

			$filename = MAILSTER_UPLOAD_DIR . '/~mailster_export_' . date( 'Y-m-d-H-i-s' ) . '.tmp';

			update_option( 'mailster_export_filename', basename( $filename ) );

			unset( $post_data['_wpnonce'], $post_data['_wp_http_referer'] );
			update_user_option( get_current_user_id(), 'mailster_export_settings', $post_data );

			try {

				add_filter(
					'filesystem_method',
					function () {
						return 'direct';
					}
				);
				$wp_filesystem = mailster_require_filesystem();

				if ( ! ( $wp_filesystem->put_contents( $filename, '', FS_CHMOD_FILE ) ) ) {
					$return['msg'] = sprintf( esc_html__( 'Not able to create file in %s. Please make sure WordPress can write files to your filesystem!', 'mailster' ), MAILSTER_UPLOAD_DIR );
				} else {

				}
			} catch ( Exception $e ) {

				$return['msg'] = $e->getMessage();

				wp_send_json_error( $return );
			}
		} else {

			$return['msg'] = esc_html__( 'No Subscribers found!', 'mailster' );
		}

		wp_send_json_success( $return );
	}


	public function ajax_do_export() {

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_export_subscribers' ) ) {
			$return['msg'] = esc_html__( 'You are not allowed to export subscribers!', 'mailster' );

			wp_send_json_error( $return );
		}

		$filename = MAILSTER_UPLOAD_DIR . '/' . get_option( 'mailster_export_filename' );

		if ( ! file_exists( $filename ) || ! wp_is_writable( $filename ) ) {
			$return['msg'] = esc_html__( 'Not able to write export file', 'mailster' );

			wp_send_json( $return );
		}

		wp_parse_str( $_POST['data'], $post_data );

		$offset   = (int) $_POST['offset'];
		$limit    = (int) $_POST['limit'];
		$raw_data = array();

		$listids  = isset( $post_data['lists'] ) ? array_filter( $post_data['lists'], 'is_numeric' ) : array();
		$statuses = isset( $post_data['status'] ) ? array_filter( $post_data['status'], 'is_numeric' ) : array();

		$encoding     = $post_data['encoding'];
		$outputformat = $post_data['outputformat'];
		$separator    = $post_data['separator'];
		if ( 'tab' == $separator ) {
			$separator = "\t";
		}

		$dateformat = $post_data['dateformat'];

		$useheader = $offset === 0 && $post_data['header'];

		$custom_fields      = mailster()->get_custom_fields();
		$meta_keys          = mailster( 'subscribers' )->get_meta_keys();
		$custom_date_fields = mailster()->get_custom_date_fields();
		$custom_field_names = array_merge( array( 'firstname', 'lastname' ), array_keys( $custom_fields ) );
		$custom_field_names = array_keys( array_intersect_key( array_flip( $custom_field_names ), array_flip( $post_data['column'] ) ) );

		if ( $useheader ) {

			$row = array();

			foreach ( $post_data['column'] as $col ) {
				switch ( $col ) {
					case '_number':
						$val = '#';
						break;
					case 'ID':
						$val = esc_html__( 'ID', 'mailster' );
						break;
					case 'email':
					case 'firstname':
					case 'lastname':
						$val = mailster_text( $col, $col );
						break;
					case '_listnames':
						$val = esc_html__( 'Lists', 'mailster' );
						break;
					case 'tags':
					case '_tagnames':
						$val = esc_html__( 'Tags', 'mailster' );
						break;
					case 'hash':
						$val = esc_html__( 'Hash', 'mailster' );
						break;
					case 'status':
						$val = esc_html__( 'Status', 'mailster' );
						break;
					case '_statuscode':
						$val = esc_html__( 'Statuscode', 'mailster' );
						break;
					case 'ip':
						$val = esc_html__( 'IP Address', 'mailster' );
						break;
					case 'signup':
						$val = esc_html__( 'Signup Date', 'mailster' );
						break;
					case 'ip_signup':
						$val = esc_html__( 'Signup IP', 'mailster' );
						break;
					case 'confirm':
						$val = esc_html__( 'Confirm Date', 'mailster' );
						break;
					case 'ip_confirm':
						$val = esc_html__( 'Confirm IP', 'mailster' );
						break;
					case 'added':
						$val = esc_html__( 'Added', 'mailster' );
						break;
					case 'updated':
						$val = esc_html__( 'Updated', 'mailster' );
						break;
					case 'rating':
						$val = esc_html__( 'Rating', 'mailster' );
						break;
					default:
						if ( isset( $custom_fields[ $col ] ) ) {
							$val = $custom_fields[ $col ]['name'];
						} elseif ( $meta_keys[ $col ] ) {
							$val = $meta_keys[ $col ];
						} else {
							$val = ucwords( $col );
						}
				}

				$val = apply_filters( 'mailster_export_heading_' . $col, $val, $post_data );

				if ( function_exists( 'mb_convert_encoding' ) ) {
					$val = mb_convert_encoding( $val, $encoding, 'UTF-8' );
				}

				switch ( $separator ) {
					case ',':
					case "\t":
						$row[] = str_replace( $separator, ' ', $val );
						break;
					default:
						$row[] = str_replace( $separator, ',', $val );
				}
			}

			$raw_data[] = $row;

		}

		$offset = $offset * $limit;

		$all_fields = isset( $post_data['column'] ) ? (array) $post_data['column'] : array();
		$special    = array_values( preg_grep( '/^_/', $all_fields ) );
		$fields     = preg_grep( '/^(?!_)/', $all_fields );
		$meta       = array_values( array_intersect( $fields, mailster( 'subscribers' )->get_meta_keys( true ) ) );
		$fields     = array_values( array_diff( $fields, $meta ) );
		$conditions = false;
		if ( isset( $_POST['conditions'] ) ) {
			wp_parse_str( $_POST['conditions'], $conditions );
			if ( isset( $conditions['conditions'] ) ) {
				$conditions = $conditions['conditions'];
			}
		}
		if ( in_array( '_statuscode', $special ) ) {
			$fields[] = 'status';
		}

		$args = array(
			'lists'      => $listids,
			'status'     => $statuses,
			'fields'     => $fields,
			'meta'       => $meta,
			'conditions' => $conditions,
			'limit'      => $limit,
			'offset'     => $offset,
		);

		$args = apply_filters( 'mailster_export_args', $args, $post_data );

		$data = mailster( 'subscribers' )->query( $args );

		if ( isset( $post_data['nolists'] ) && $post_data['nolists'] ) {

			$args['lists'] = -1;
			$data2         = mailster( 'subscribers' )->query( $args );

			$data = array_merge( $data, $data2 );
		}

		$counter = 1 + $offset;

		$statusnames = mailster( 'subscribers' )->get_status( null, true );

		foreach ( $data as $user ) {

			$row = array_flip( $all_fields );

			foreach ( $row as $key => $empty ) {

				switch ( $key ) {
					case '_number':
						$val = $counter;
						break;
					case 'id':
						$val = $user->ID;
						break;
					case 'email':
						$val = $user->email;
						break;
					case '_listnames':
						$list = mailster( 'subscribers' )->get_lists( $user->ID );
						$val  = implode( ', ', wp_list_pluck( $list, 'name' ) );
						break;
					case 'tags':
					case '_tagnames':
						$tag = mailster( 'subscribers' )->get_tags( $user->ID );
						$val = implode( ', ', wp_list_pluck( $tag, 'name' ) );
						break;
					case 'status':
						$val = $statusnames[ $user->status ];
						break;
					case '_statuscode':
						$val = $user->status;
						break;
					case 'ip':
					case 'ip_signup':
					case 'ip_comfirm':
						$val = isset( $user->{$key} ) ? $user->{$key} : '';
						break;
					case 'added':
					case 'updated':
					case 'signup':
					case 'confirm':
					case 'gdpr':
						$val = ! empty( $user->{$key} ) ? ( $dateformat ? date( $dateformat, $user->{$key} ) : $user->{$key} ) : '';
						break;
					case 'rating':
						$val = $user->rating;
						break;
					default:
						$val = isset( $user->{$key} ) ? $user->{$key} : '';
						if ( $dateformat && in_array( $key, $custom_date_fields ) ) {
							$val = date( $dateformat, strtotime( $user->{$key} ) );
						}

						// remove line breaks
						$val = preg_replace( "/[\n\r]/", ' ', $val );
				}

				$val = apply_filters( 'mailster_export_field_' . $key, $val, $post_data );

				if ( function_exists( 'mb_convert_encoding' ) ) {
					$val = mb_convert_encoding( $val, $encoding, 'UTF-8' );
				}

				switch ( $separator ) {
					case ',':
					case "\t":
						$row[ $key ] = str_replace( $separator, ' ', $val );
						break;
					default:
						$row[ $key ] = str_replace( $separator, ',', $val );
				}
			}

			$raw_data[] = $row;

			++$counter;
		}

		$output = '';

		if ( 'html' == $outputformat ) {

			if ( $useheader ) {
				$firstrow = array_shift( $raw_data );
				$output  .= '<tr>' . "\n";
				foreach ( $firstrow as $key => $r ) {
					$output .= '<th>' . strip_tags( $r ) . '</th>' . "\n";
				}
				$output .= '</tr>' . "\n";
			}
			foreach ( $raw_data as $row ) {
				$output .= '<tr>' . "\n";
				foreach ( $row as $key => $r ) {
					$output .= '<td>' . esc_html( $r ) . '</td>' . "\n";
				}
				$output .= '</tr>' . "\n";
			}
		} elseif ( 'xls' == $outputformat ) {

			if ( $useheader ) {
				$firstrow = array_shift( $raw_data );
				$output  .= '<mailster:Row mailster:StyleID="1">' . "\n";
				foreach ( $firstrow as $key => $r ) {
					$output .= '<mailster:Cell><mailster:Data mailster:Type="String">' . strip_tags( $r ) . '</mailster:Data></mailster:Cell>' . "\n";
				}
				$output .= '</mailster:Row>' . "\n";
			}
			foreach ( $raw_data as $row ) {
				$output .= '<mailster:Row>' . "\n";

				foreach ( $row as $key => $r ) {
					$type = 'String';
					if ( in_array( $key, array( 'ID', '_number', '_statuscode', 'rating', 'timeoffset' ) ) ) {
						$type = 'Number';
					}
					$output .= '<mailster:Cell><mailster:Data mailster:Type="' . $type . '">' . esc_html( $r ) . '</mailster:Data></mailster:Cell>' . "\n";
				}
				$output .= '</mailster:Row>' . "\n";
			}
		} else {
			foreach ( $raw_data as $row ) {
				$output .= implode( $separator, $row ) . "\n";
			}
		}

		try {

			if ( $output ) {
				mailster( 'helper' )->file_put_contents( $filename, $output, 'a' );
				$file_size = @filesize( $filename );

			} else {
				$return['finished'] = true;

				$finalname = MAILSTER_UPLOAD_DIR . '/mailster_export_' . date( 'Y-m-d-H-i-s' ) . '.' . $outputformat;
				if ( file_exists( $filename ) ) {
					copy( $filename, $finalname );
					$file_size = filesize( $filename );
					update_option( 'mailster_export_filename', basename( $finalname ) );
					unlink( $filename );
				}
				$return['filename'] = admin_url( 'admin-ajax.php?action=mailster_download_export_file&file=' . basename( $finalname ) . '&format=' . $outputformat . '&_wpnonce=' . wp_create_nonce( 'mailster_nonce' ) );
			}

			$return['total'] = $file_size ? size_format( $file_size, 2 ) : 0;

		} catch ( Exception $e ) {

			$return['msg'] = $e->getMessage();
			wp_send_json_error( $return );

		}

		wp_send_json_success( $return );
	}


	public function ajax_download_export_file() {

		$this->ajax_nonce( 'not allowed' );

		$folder = MAILSTER_UPLOAD_DIR;

		$filename = basename( $_REQUEST['file'] );
		$file     = $folder . '/' . $filename;

		if ( ! file_exists( $file ) ) {
			die( 'not found' );
		}

		$format = $_REQUEST['format'];

		send_nosniff_header();
		nocache_headers();

		switch ( $format ) {
			case 'html':
				header( 'Content-Type: text/html; name="' . $filename . '"' );
				break;
			case 'xls':
				header( 'Content-Type: application/vnd.ms-excel; name="' . $filename . '"' );
				break;
			case 'csv':
				header( 'Content-Type: text/csv; name="' . $filename . '"' );
				header( 'Content-Transfer-Encoding: binary' );
				break;
			default;
			die( 'format not allowed' );
		}

		header( 'Content-Disposition: attachment; filename="' . $filename . '"' );
		header( 'Connection: close' );

		if ( 'html' == $format ) {
			echo '<table>' . "\n";
		} elseif ( 'xls' == $format ) {
			echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
			echo '<mailster:Workbook xmlns:mailster="urn:schemas-microsoft-com:office:spreadsheet">' . "\n";
			echo '<mailster:Styles><mailster:Style mailster:ID="1"><mailster:Font mailster:Bold="1"/></mailster:Style></mailster:Styles>' . "\n";
			echo '<mailster:Worksheet mailster:Name="' . esc_attr__( 'Mailster Subscribers', 'mailster' ) . '">' . "\n";
			echo '<mailster:Table>' . "\n";
		}

		readfile( $file );

		if ( 'html' == $format ) {
			echo '</table>';
		} elseif ( 'xls' == $format ) {
			echo '</mailster:Table>' . "\n";
			echo '</mailster:Worksheet>' . "\n";
			echo '</mailster:Workbook>';
		}

		$wp_filesystem = mailster_require_filesystem();

		$wp_filesystem && $wp_filesystem->delete( $file );
		exit;
	}


	public function ajax_delete_contacts() {

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_bulk_delete_subscribers' ) ) {
			$return['msg'] = 'no allowed';

			wp_send_json_error( $return );
		}

		wp_parse_str( $_POST['data'], $post_data );

		$conditions = false;
		if ( isset( $_POST['conditions'] ) ) {
			wp_parse_str( $_POST['conditions'], $conditions );
			if ( isset( $conditions['conditions'] ) ) {
				$conditions = $conditions['conditions'];
			}
		}
		$post_data['conditions'] = $conditions;
		unset( $post_data['_wpnonce'], $post_data['_wp_http_referer'] );

		$schedule = isset( $_POST['schedule'] );

		if ( $schedule ) {
			$name = basename( $_POST['name'] );
			$jobs = get_option( 'mailster_manage_jobs', array() );
			$key  = md5( serialize( $post_data ) );

			if ( isset( $jobs[ $key ] ) ) {
				$return['msg'] = sprintf( esc_html__( 'The same job has been scheduled already (%s).', 'mailster' ), $jobs[ $key ]['name'] );
				wp_send_json_error( $return );
			}

			$jobs[ $key ] = wp_parse_args(
				array(
					'user_id'   => get_current_user_id(),
					'name'      => $name,
					'timestamp' => time(),
				),
				$post_data
			);

			update_option( 'mailster_manage_jobs', $jobs );

			$return['msg'] = esc_html__( 'Job scheduled.', 'mailster' );
			wp_send_json_success( $return );

		}

		if ( ! ( $count = $this->delete_contacts( $post_data ) ) ) {
			$return['msg'] = esc_html__( 'No Subscribers removed.', 'mailster' );
			wp_send_json_error( $return );

		}
		$return['msg'] = sprintf( esc_html__( _n( '%s Subscriber removed.', '%s Subscribers removed.', $count, 'mailster' ) ), number_format_i18n( $count ) );

		wp_send_json_success( $return );
	}

	public function ajax_delete_delete_job() {

		$this->ajax_nonce();

		if ( ! current_user_can( 'mailster_bulk_delete_subscribers' ) ) {
			$return['msg'] = 'no allowed';
			wp_send_json_error( $return );
		}

		$id = $_POST['id'];

		$jobs = get_option( 'mailster_manage_jobs', array() );

		if ( isset( $jobs[ $id ] ) ) {
			unset( $jobs[ $id ] );
			update_option( 'mailster_manage_jobs', $jobs );
		}

		$return['msg'] = esc_html__( 'Job deleted.', 'mailster' );

		wp_send_json_success( $return );
	}

	public function delete_job() {

		foreach ( $jobs = get_option( 'mailster_manage_jobs', array() ) as $id => $job ) {
			$this->delete_contacts( $job, true );
		}
	}

	public function delete_contacts( $args, $trash = false ) {

		$count          = 0;
		$nolists        = isset( $args['nolists'] ) ? $args['nolists'] : null;
		$remove_actions = isset( $args['remove_actions'] ) ? $args['remove_actions'] : null;
		$job            = $args;
		$current_filter = current_filter();

		$subscribers = array();

		$args = array(
			'lists'      => isset( $args['lists'] ) ? array_filter( $args['lists'], 'is_numeric' ) : array(),
			'status'     => isset( $args['status'] ) ? array_filter( $args['status'], 'is_numeric' ) : null,
			'conditions' => isset( $args['conditions'] ) ? (array) $args['conditions'] : null,
		);

		if ( $current_filter == 'mailster_cron_cleanup' ) {
			// do not delete to fast (at least one hour ago)
			$args['updated_before'] = strtotime( '-1 hour' );

		}
		$args = apply_filters( 'mailster_delete_args', $args );

		if ( ! empty( $args['lists'] ) ) {

			$subscribers = array_merge( mailster( 'subscribers' )->query( $args ), $subscribers );

		}

		if ( $nolists ) {

			$args['lists'] = -1;
			$subscribers   = array_merge( mailster( 'subscribers' )->query( $args ), $subscribers );

		}

		$count = count( $subscribers );

		$subscriber_ids = wp_list_pluck( $subscribers, 'ID' );
		$success        = mailster( 'subscribers' )->remove( $subscriber_ids, $args['status'], $remove_actions, true, $trash );

		if ( $success && $count ) {

			if ( $current_filter == 'mailster_cron_cleanup' ) {

				// send notification to the user who created the job
				if ( $user = get_user_by( 'id', $job['user_id'] ) ) {
					$n = mailster( 'notification' );
					$n->to( $user->user_email );
					$n->template( 'delete_job' );
					$n->requeue( false );
					// $mail = $n->mail;
					$n->add(
						array(
							'subscribers' => $subscribers,
							'job'         => $job,
						)
					);
				}
			}
		}

		return $count;
	}



	public function empty_trash() {

		return mailster( 'subscribers' )->empty_trash(
			$args = array(
				'updated_before' => strtotime( '-14 days' ),
			)
		);
	}


	/**
	 *
	 *
	 * @param unknown $return (optional)
	 * @param unknown $nonce  (optional)
	 */
	private function ajax_nonce( $return = null, $nonce = 'mailster_nonce' ) {
		if ( ! wp_verify_nonce( $_REQUEST['_wpnonce'], $nonce ) ) {
			if ( is_string( $return ) ) {
				wp_die( $return );
			} else {
				die( $return );
			}
		}
	}



	public function display_import_method( $id ) {

		$plugins = array(
			'mailchimp' => 'mailster-mailchimp/mailster-mailchimp.php',
		);

		if ( isset( $this->integrations[ $id ] ) ) {
			$this->integrations[ $id ]->import_options();
			return;
		}

		if ( ! isset( $plugins[ $id ] ) ) {
			printf( esc_html__( 'No Importer for %s found.', 'mailster' ), ucwords( $id ) );
			return;
		}

		$slug      = $plugins[ $id ];
		$installed = get_plugins();

		?>
		<form class="importer-quickinstall-form" data-slug="<?php echo esc_attr( $slug ); ?>" data-id="<?php echo esc_attr( $id ); ?>">
		<p><?php printf( esc_html__( 'To import subscribers from %s you need an additional addon.', 'mailster' ), ucwords( $id ) ); ?></p>
		<section class="footer alternate">
		<p>
			<?php if ( isset( $installed[ $slug ] ) ) : ?>
				<?php submit_button( esc_html__( 'Activate Addon', 'mailster' ), 'primary', 'submit', false ); ?>
			<?php elseif ( ! is_plugin_active( $slug ) ) : ?>
				<?php submit_button( esc_html__( 'Install Addon', 'mailster' ), 'primary', 'submit', false ); ?>
			<?php endif; ?>
		</p>
		</section>
		</form>
		<?php
	}
}
