<?php

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/**

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* https://www.dropbox.com/developers/apply?cont=/developers/apps

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*/

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if (!defined('UPDRAFTPLUS_DIR')) die('No direct access allowed.');

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// Converted to multi-options (Feb 2017-) and previous options conversion removed: Yes

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if (!class_exists('UpdraftPlus_BackupModule')) require_once(UPDRAFTPLUS_DIR.'/methods/backup-module.php');

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// Fix a potential problem for users who had the short-lived 1.12.35-1.12.38 free versions (see: https://wordpress.org/support/topic/1-12-37-dropbox-auth-broken/page/2/#post-8981457)

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// Can be removed after a few months

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$potential_options = UpdraftPlus_Options::get_updraft_option('updraft_dropbox');

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if (is_array($potential_options) && isset($potential_options['version']) && isset($potential_options['settings']) && array() === $potential_options['settings']) {

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// Wipe it, which will force its re-creation in proper format

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UpdraftPlus_Options::delete_updraft_option('updraft_dropbox');

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}

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class UpdraftPlus_BackupModule_dropbox extends UpdraftPlus_BackupModule {

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private $current_file_hash;

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private $current_file_size;

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private $uploaded_offset;

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private $upload_tick;

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/**

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* This callback is called as upload progress is made

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*

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* @param Integer $offset - the byte offset

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* @param String $uploadid - identifier for the upload in progress

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* @param Boolean|String $fullpath - optional full path to the file being uploaded

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*/

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public function chunked_callback($offset, $uploadid, $fullpath = false) {

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global $updraftplus;

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$storage = $this->get_storage();

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// Update upload ID

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$this->jobdata_set('upload_id_'.$this->current_file_hash, $uploadid);

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$this->jobdata_set('upload_offset_'.$this->current_file_hash, $offset);

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$time_now = microtime(true);

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$time_since_last_tick = $time_now - $this->upload_tick;

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$data_since_last_tick = $offset - $this->uploaded_offset;

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$this->upload_tick = $time_now;

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$this->uploaded_offset = $offset;

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// Here we use job-wide data, because we don't expect wildly different performance for different Dropbox accounts

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$chunk_size = $updraftplus->jobdata_get('dropbox_chunk_size', 1048576);

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// Don't go beyond 10MB, or change the chunk size after the last segment

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if ($chunk_size < 10485760 && $this->current_file_size > 0 && $offset < $this->current_file_size) {

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$job_run_time = $time_now - $updraftplus->job_time_ms;

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if ($time_since_last_tick < 10) {

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$upload_rate = $data_since_last_tick / max($time_since_last_tick, 1);

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$upload_secs = min(floor($job_run_time), 10);

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if ($job_run_time < 15) $upload_secs = max(6, $job_run_time*0.6);

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$new_chunk = max(min($upload_secs * $upload_rate * 0.9, 10485760), 1048576);

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$new_chunk = $new_chunk - ($new_chunk % 524288);

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$chunk_size = (int) $new_chunk;

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$storage->setChunkSize($chunk_size);

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$updraftplus->jobdata_set('dropbox_chunk_size', $chunk_size);

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}

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}

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if ($this->current_file_size > 0) {

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$percent = round(100*($offset/$this->current_file_size), 1);

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$updraftplus->record_uploaded_chunk($percent, "$uploadid, $offset, ".round($chunk_size/1024, 1)." KB", $fullpath);

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} else {

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$this->log("Chunked Upload: $offset bytes uploaded");

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// This act is done by record_uploaded_chunk, and helps prevent overlapping runs

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if ($fullpath) touch($fullpath);

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}

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}

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/**

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* Supported features

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*

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* @return Array

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*/

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public function get_supported_features() {

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// This options format is handled via only accessing options via $this->get_options()

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return array('multi_options', 'config_templates', 'multi_storage', 'conditional_logic', 'manual_authentication');

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}

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/**

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* Default options

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*

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* @return Array

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*/

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public function get_default_options() {

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return array(

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'appkey' => '',

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'secret' => '',

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'folder' => '',

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'tk_access_token' => '',

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);

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}

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/**

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* Check whether options have been set up by the user, or not

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*

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* @param Array $opts - the potential options

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*

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* @return Boolean

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*/

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public function options_exist($opts) {

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if (is_array($opts) && !empty($opts['tk_access_token'])) return true;

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return false;

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}

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/**

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* Acts as a WordPress options filter

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*

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* @param Array $dropbox - An array of Dropbox options

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* @return Array - the returned array can either be the set of updated Dropbox settings or a WordPress error array

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*/

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public function options_filter($dropbox) {

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// Get the current options (and possibly update them to the new format)

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$opts = UpdraftPlus_Storage_Methods_Interface::update_remote_storage_options_format('dropbox');

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if (is_wp_error($opts)) {

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if ('recursion' !== $opts->get_error_code()) {

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$msg = "(".$opts->get_error_code()."): ".$opts->get_error_message();

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$this->log($msg);

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error_log("UpdraftPlus: $msg");

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}

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// The saved options had a problem; so, return the new ones

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return $dropbox;

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}

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// If the input is not as expected, then return the current options

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if (!is_array($dropbox)) return $opts;

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// Remove instances that no longer exist

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foreach ($opts['settings'] as $instance_id => $storage_options) {

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if (!isset($dropbox['settings'][$instance_id])) unset($opts['settings'][$instance_id]);

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}

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// Dropbox has a special case where the settings could be empty so we should check for this before

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if (!empty($dropbox['settings'])) {

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foreach ($dropbox['settings'] as $instance_id => $storage_options) {

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if (!empty($opts['settings'][$instance_id]['tk_access_token'])) {

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$current_app_key = empty($opts['settings'][$instance_id]['appkey']) ? false : $opts['settings'][$instance_id]['appkey'];

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$new_app_key = empty($storage_options['appkey']) ? false : $storage_options['appkey'];

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// If a different app key is being used, then wipe the stored token as it cannot belong to the new app

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if ($current_app_key !== $new_app_key) {

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unset($opts['settings'][$instance_id]['tk_access_token']);

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unset($opts['settings'][$instance_id]['ownername']);

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unset($opts['settings'][$instance_id]['CSRF']);

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}

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}

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// Now loop over the new options, and replace old options with them

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foreach ($storage_options as $key => $value) {

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if (null === $value) {

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unset($opts['settings'][$instance_id][$key]);

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} else {

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if (!isset($opts['settings'][$instance_id])) $opts['settings'][$instance_id] = array();

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$opts['settings'][$instance_id][$key] = $value;

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}

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}

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if (!empty($opts['settings'][$instance_id]['folder']) && preg_match('#^https?://(www.)dropbox\.com/home/Apps/UpdraftPlus(.Com)?([^/]*)/(.*)$#i', $opts['settings'][$instance_id]['folder'], $matches)) $opts['settings'][$instance_id]['folder'] = $matches[3];

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// check if we have the dummy nosave option and remove it so that it doesn't get saved

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if (isset($opts['settings'][$instance_id]['dummy-nosave'])) unset($opts['settings'][$instance_id]['dummy-nosave']);

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}

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}

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return $opts;

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}

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public function backup($backup_array) {

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global $updraftplus;

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$opts = $this->get_options();

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if (empty($opts['tk_access_token'])) {

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$this->log('You do not appear to be authenticated with Dropbox (1)');

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$this->log(__('You do not appear to be authenticated with Dropbox', 'updraftplus'), 'error');

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return false;

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}

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// 28 September 2017: APIv1 is gone. We'll keep the variable to make life easier if there's ever an APIv3.

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$use_api_ver = 2;

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if (empty($opts['tk_request_token'])) {

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$this->log("begin cloud upload (using API version $use_api_ver with OAuth v2 token)");

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} else {

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$this->log("begin cloud upload (using API version $use_api_ver with OAuth v1 token)");

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}

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$chunk_size = $updraftplus->jobdata_get('dropbox_chunk_size', 1048576);

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try {

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$dropbox = $this->bootstrap();

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if (false === $dropbox) throw new Exception(__('You do not appear to be authenticated with Dropbox', 'updraftplus'));

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$this->log("access gained; setting chunk size to: ".round($chunk_size/1024, 1)." KB");

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$dropbox->setChunkSize($chunk_size);

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} catch (Exception $e) {

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$this->log('error when trying to gain access: '.$e->getMessage().' (line: '.$e->getLine().', file: '.$e->getFile().')');

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$this->log(sprintf(__('error: %s (see log file for more)', 'updraftplus'), $e->getMessage()), 'error');

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return false;

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}

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$updraft_dir = $updraftplus->backups_dir_location();

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foreach ($backup_array as $file) {

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$available_quota = -1;

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// If we experience any failures collecting account info, then carry on anyway

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try {

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/*

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Quota information is no longer provided with account information a new call to quotaInfo must be made to get this information.

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*/

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$quota_info = $dropbox->quotaInfo();

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// Access token expired try to refresh and then call quota info again

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if ("401" == $quota_info['code']) {

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$this->log('HTTP code 401 (unauthorized) code returned from Dropbox; attempting to refresh access token');

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$dropbox->refreshAccessToken();

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$quota_info = $dropbox->quotaInfo();

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}

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if ("200" != $quota_info['code']) {

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$message = "account/info did not return HTTP 200; returned: ". $quota_info['code'];

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} elseif (!isset($quota_info['body'])) {

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$message = "account/info did not return the expected data";

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} else {

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$body = $quota_info['body'];

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if (isset($body->quota_info)) {

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$quota_info = $body->quota_info;

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$total_quota = $quota_info->quota;

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$normal_quota = $quota_info->normal;

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$shared_quota = $quota_info->shared;

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$available_quota = $total_quota - ($normal_quota + $shared_quota);

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$message = "quota usage: normal=".round($normal_quota/1048576, 1)." MB, shared=".round($shared_quota/1048576, 1)." MB, total=".round($total_quota/1048576, 1)." MB, available=".round($available_quota/1048576, 1)." MB";

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} else {

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$total_quota = max($body->allocation->allocated, 1);

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$used = $body->used;

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/* check here to see if the account is a team account and if so use the other used value

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This will give us their total usage including their individual account and team account */

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if (isset($body->allocation->used)) $used = $body->allocation->used;

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$available_quota = $total_quota - $used;

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$message = "quota usage: used=".round($used/1048576, 1)." MB, total=".round($total_quota/1048576, 1)." MB, available=".round($available_quota/1048576, 1)." MB";

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}

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}

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$this->log($message);

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} catch (Exception $e) {

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$this->log("exception (".get_class($e).") occurred whilst getting account info: ".$e->getMessage());

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// $this->log(sprintf(__("%s error: %s", 'updraftplus'), 'Dropbox', $e->getMessage()).' ('.$e->getCode().')', 'warning', md5($e->getMessage()));

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}

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$file_success = 1;

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$hash = md5($file);

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$this->current_file_hash = $hash;

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$filesize = filesize($updraft_dir.'/'.$file);

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$this->current_file_size = $filesize;

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// Into KB

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$filesize = $filesize/1024;

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$microtime = microtime(true);

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if ('None' != ($upload_id = $this->jobdata_get('upload_id_'.$hash, 'None', 'updraf_dbid_'.$hash))) {

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// Resume

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$offset = $this->jobdata_get('upload_offset_'.$hash, 0, 'updraf_dbof_'.$hash);

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if ($offset) $this->log("This is a resumption: $offset bytes had already been uploaded");

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} else {

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$offset = 0;

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$upload_id = 'None';

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}

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// We don't actually abort now - there's no harm in letting it try and then fail

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if (-1 != $available_quota && $available_quota < ($filesize-$offset)) {

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$this->log("File upload expected to fail: file data remaining to upload ($file) size is ".($filesize-$offset)." b (overall file size; .".($filesize*1024)." b), whereas available quota is only $available_quota b");

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// $this->log(sprintf(__("Account full: your %s account has only %d bytes left, but the file to be uploaded has %d bytes remaining (total size: %d bytes)",'updraftplus'),'Dropbox', $available_quota, $filesize-$offset, $filesize), 'warning');

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}

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$ufile = apply_filters('updraftplus_dropbox_modpath', $file, $this);

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$this->log("Attempt to upload: $file to: $ufile");

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$this->upload_tick = microtime(true);

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$this->uploaded_offset = $offset;

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try {

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$response = $dropbox->chunkedUpload($updraft_dir.'/'.$file, '', $ufile, true, $offset, $upload_id, array($this, 'chunked_callback'));

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if (empty($response['code']) || "200" != $response['code']) {

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$this->log('Unexpected HTTP code returned from Dropbox: '.$response['code']." (".serialize($response).")");

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if ($response['code'] >= 400) {

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if (401 == $response['code']) {

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$this->log('HTTP code 401 returned from Dropbox, refreshing access token');

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$dropbox->refreshAccessToken();

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}

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$this->log(sprintf(__('error: failed to upload file to %s (see log file for more)', 'updraftplus'), $file), 'error');

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$file_success = 0;

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} else {

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$this->log(__('did not return the expected response - check your log file for more details', 'updraftplus'), 'warning');

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}

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}

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} catch (Exception $e) {

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$this->log("chunked upload exception (".get_class($e)."): ".$e->getMessage().' (line: '.$e->getLine().', file: '.$e->getFile().')');

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if (preg_match("/Submitted input out of alignment: got \[(\d+)\] expected \[(\d+)\]/i", $e->getMessage(), $matches)) {

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// Try the indicated offset

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$we_tried = $matches[1];

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$dropbox_wanted = (int) $matches[2];

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$this->log("not yet aligned: tried=$we_tried, wanted=$dropbox_wanted; will attempt recovery");

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$this->uploaded_offset = $dropbox_wanted;

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$upload_id = $this->jobdata_get('upload_id_'.$hash, 'None', 'updraf_dbid_'.$hash);

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try {

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$dropbox->chunkedUpload($updraft_dir.'/'.$file, '', $ufile, true, $dropbox_wanted, $upload_id, array($this, 'chunked_callback'));

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} catch (Exception $e) {

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$msg = $e->getMessage();

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if (preg_match('/Upload with upload_id .* already completed/', $msg)) {

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$this->log('returned an error, but apparently indicating previous success: '.$msg);

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} else {

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$this->log($msg.' (line: '.$e->getLine().', file: '.$e->getFile().')');

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$this->log(sprintf(__('failed to upload file to %s (see log file for more)', 'updraftplus'), $ufile), 'error');

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$file_success = 0;

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if (strpos($msg, 'select/poll returned error') !== false && $this->upload_tick > 0 && time() - $this->upload_tick > 800) {

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UpdraftPlus_Job_Scheduler::reschedule(60);

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$this->log("Select/poll returned after a long time: scheduling a resumption and terminating for now");

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UpdraftPlus_Job_Scheduler::record_still_alive();

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die;

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}

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}

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}

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} else {

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$msg = $e->getMessage();

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if (preg_match('/Upload with upload_id .* already completed/', $msg)) {

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$this->log('returned an error, but apparently indicating previous success: '.$msg);

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} else {

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$this->log(sprintf(__('failed to upload file to %s (see log file for more)', 'updraftplus'), $ufile), 'error');

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$file_success = 0;

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if (strpos($msg, 'select/poll returned error') !== false && $this->upload_tick > 0 && time() - $this->upload_tick > 800) {

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UpdraftPlus_Job_Scheduler::reschedule(60);

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$this->log("Select/poll returned after a long time: scheduling a resumption and terminating for now");

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UpdraftPlus_Job_Scheduler::record_still_alive();

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die;

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}

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}

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}

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}

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if ($file_success) {

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$updraftplus->uploaded_file($file);

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$microtime_elapsed = microtime(true)-$microtime;

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$speedps = ($microtime_elapsed > 0) ? $filesize/$microtime_elapsed : 0;

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$speed = sprintf("%.2d", $filesize)." KB in ".sprintf("%.2d", $microtime_elapsed)."s (".sprintf("%.2d", $speedps)." KB/s)";

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$this->log("File upload success (".$file."): $speed");

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$this->jobdata_delete('upload_id_'.$hash, 'updraf_dbid_'.$hash);

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$this->jobdata_delete('upload_offset_'.$hash, 'updraf_dbof_'.$hash);

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}

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}

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return null;

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}

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/**

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* This method gets a list of files from the remote stoage that match the string passed in and returns an array of backups

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*

[379] Fix | Delete

* @param String $match a substring to require (tested via strpos() !== false)

[380] Fix | Delete

* @return Array

[381] Fix | Delete

*/

[382] Fix | Delete

public function listfiles($match = 'backup_') {

[383] Fix | Delete

[384] Fix | Delete

$opts = $this->get_options();

[385] Fix | Delete

[386] Fix | Delete

if (empty($opts['tk_access_token'])) return new WP_Error('no_settings', __('No settings were found', 'updraftplus').' (dropbox)');

[387] Fix | Delete

[388] Fix | Delete

try {

[389] Fix | Delete

$dropbox = $this->bootstrap();

[390] Fix | Delete

} catch (Exception $e) {

[391] Fix | Delete

$this->log('access error: '.$e->getMessage().' (line: '.$e->getLine().', file: '.$e->getFile().')');

[392] Fix | Delete

return new WP_Error('access_error', $e->getMessage());

[393] Fix | Delete

}

[394] Fix | Delete

[395] Fix | Delete

$searchpath = '/'.untrailingslashit(apply_filters('updraftplus_dropbox_modpath', '', $this));

[396] Fix | Delete

[397] Fix | Delete

try {

[398] Fix | Delete

/* Some users could have a large amount of backups, the max search is 1000 entries we should continue to search until there are no more entries to bring back. */

[399] Fix | Delete

$cursor = '';

[400] Fix | Delete

$matches = array();

[401] Fix | Delete

[402] Fix | Delete

while (true) {

[403] Fix | Delete

$search = $dropbox->search($match, $searchpath, 1000, $cursor);

[404] Fix | Delete

if (empty($search['code']) || 200 != $search['code']) return new WP_Error('response_error', sprintf(__('%s returned an unexpected HTTP response: %s', 'updraftplus'), 'Dropbox', $search['code']), $search['body']);

[405] Fix | Delete

[406] Fix | Delete

if (empty($search['body'])) return array();

[407] Fix | Delete

[408] Fix | Delete

if (isset($search['body']->matches) && is_array($search['body']->matches)) {

[409] Fix | Delete

$matches = array_merge($matches, $search['body']->matches);

[410] Fix | Delete

} elseif (is_array($search['body'])) {

[411] Fix | Delete

$matches = $search['body'];

[412] Fix | Delete

} else {

[413] Fix | Delete

break;

[414] Fix | Delete

}

[415] Fix | Delete

[416] Fix | Delete

if (isset($search['body']->has_more) && true == $search['body']->has_more && isset($search['body']->cursor)) {

[417] Fix | Delete

$cursor = $search['body']->cursor;

[418] Fix | Delete

} else {

[419] Fix | Delete

break;

[420] Fix | Delete

}

[421] Fix | Delete

}

[422] Fix | Delete

[423] Fix | Delete

} catch (Exception $e) {

[424] Fix | Delete

$this->log($e->getMessage().' (line: '.$e->getLine().', file: '.$e->getFile().')');

[425] Fix | Delete

// The most likely cause of a search_error is specifying a non-existent path, which should just result in an empty result set.

[426] Fix | Delete

// return new WP_Error('search_error', $e->getMessage());

[427] Fix | Delete

return array();

[428] Fix | Delete

}

[429] Fix | Delete

[430] Fix | Delete

$results = array();

[431] Fix | Delete

[432] Fix | Delete

foreach ($matches as $item) {

[433] Fix | Delete

$item = $item->metadata;

[434] Fix | Delete

if (!is_object($item)) continue;

[435] Fix | Delete

if (isset($item->metadata)) $item = $item->metadata; // 2/files/search_v2 has a slightly different output structure compared to 2/files/search model

[436] Fix | Delete

[437] Fix | Delete

if ((!isset($item->size) || $item->size > 0) && 'folder' != $item->{'.tag'} && !empty($item->path_display) && 0 === strpos($item->path_display, $searchpath)) {

[438] Fix | Delete

[439] Fix | Delete

$path = substr($item->path_display, strlen($searchpath));

[440] Fix | Delete

if ('/' == substr($path, 0, 1)) $path = substr($path, 1);

[441] Fix | Delete

[442] Fix | Delete

// Ones in subfolders are not wanted

[443] Fix | Delete

if (false !== strpos($path, '/')) continue;

[444] Fix | Delete

[445] Fix | Delete

$result = array('name' => $path);

[446] Fix | Delete

if (!empty($item->size)) $result['size'] = $item->size;

[447] Fix | Delete

[448] Fix | Delete

$results[] = $result;

[449] Fix | Delete

}

[450] Fix | Delete

}

[451] Fix | Delete

[452] Fix | Delete

return $results;

[453] Fix | Delete

}

[454] Fix | Delete

[455] Fix | Delete

/**

[456] Fix | Delete

* Identification of Dropbox app

[457] Fix | Delete

*

[458] Fix | Delete

* @return Array

[459] Fix | Delete

*/

[460] Fix | Delete

private function defaults() {

[461] Fix | Delete

return apply_filters('updraftplus_dropbox_defaults', array('Z3Q3ZmkwbnplNHA0Zzlx', 'bTY0bm9iNmY4eWhjODRt'));

[462] Fix | Delete

}

[463] Fix | Delete

[464] Fix | Delete

/**

[465] Fix | Delete

* Delete files from the service using the Dropbox API

[466] Fix | Delete

*

[467] Fix | Delete

* @param Array $files - array of filenames to delete

[468] Fix | Delete

* @param Array $data - unused here

[469] Fix | Delete

* @param Array $sizeinfo - unused here

[470] Fix | Delete

* @return Boolean|String - either a boolean true or an error code string

[471] Fix | Delete

*/

[472] Fix | Delete

public function delete($files, $data = null, $sizeinfo = array()) {// phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable -- $data and $sizeinfo unused

[473] Fix | Delete

[474] Fix | Delete

if (is_string($files)) $files = array($files);

[475] Fix | Delete

[476] Fix | Delete

$opts = $this->get_options();

[477] Fix | Delete

[478] Fix | Delete

if (empty($opts['tk_access_token'])) {

[479] Fix | Delete

$this->log('You do not appear to be authenticated with Dropbox (3)');

[480] Fix | Delete

$this->log(sprintf(__('You do not appear to be authenticated with %s (whilst deleting)', 'updraftplus'), 'Dropbox'), 'warning');

[481] Fix | Delete

return 'authentication_fail';

[482] Fix | Delete

}

[483] Fix | Delete

[484] Fix | Delete

try {

[485] Fix | Delete

$dropbox = $this->bootstrap();

[486] Fix | Delete

} catch (Exception $e) {

[487] Fix | Delete

$this->log($e->getMessage().' (line: '.$e->getLine().', file: '.$e->getFile().')');

[488] Fix | Delete

$this->log(sprintf(__('Failed to access %s when deleting (see log file for more)', 'updraftplus'), 'Dropbox'), 'warning');

[489] Fix | Delete

return 'service_unavailable';

[490] Fix | Delete

}

[491] Fix | Delete

if (false === $dropbox) return false;

[492] Fix | Delete

[493] Fix | Delete

$any_failures = false;

[494] Fix | Delete

[495] Fix | Delete

foreach ($files as $file) {

[496] Fix | Delete

$ufile = apply_filters('updraftplus_dropbox_modpath', $file, $this);

[497] Fix | Delete

$this->log("request deletion: $ufile");

[498] Fix | Delete

[499] Fix | Delete