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<?php namespace App\Libraries; class Google { private $Settings_model; public function __construct() { $this->Settings_model = model("App\Models\Settings_model"); //load resources require_once(APPPATH . "ThirdParty/Google/google-api-php-client/vendor/autoload.php"); } //authorize connection public function authorize() { $client = $this->_get_client_credentials(); $this->_check_access_token($client, true); } //check access token private function _check_access_token($client, $redirect_to_settings = false) { //load previously authorized token from database, if it exists. $accessToken = get_setting("google_drive_oauth_access_token"); if (get_setting("google_drive_authorized") && $accessToken) { $client->setAccessToken(json_decode($accessToken, true)); } // If there is no previous token or it's expired. if ($client->isAccessTokenExpired()) { // Refresh the token if possible, else fetch a new one. if ($client->getRefreshToken()) { $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken()); if ($redirect_to_settings) { app_redirect("settings/integration/google_drive"); } } else { $authUrl = $client->createAuthUrl(); app_redirect($authUrl, true); } } else { if ($redirect_to_settings) { app_redirect("settings/integration/google_drive"); } } } //fetch access token with auth code and save to database public function save_access_token($auth_code) { $client = $this->_get_client_credentials(); // Exchange authorization code for an access token. $accessToken = $client->fetchAccessTokenWithAuthCode($auth_code); $error = get_array_value($accessToken, "error"); if ($error) die($error); $client->setAccessToken($accessToken); // Save the token to database $new_access_token = json_encode($client->getAccessToken()); if ($new_access_token) { $this->Settings_model->save_setting("google_drive_oauth_access_token", $new_access_token); //got the valid access token. store to setting that it's authorized $this->Settings_model->save_setting("google_drive_authorized", "1"); } //create parent folder $this->_create_folder(get_setting('app_title'), "parent"); } //check a folder if it exists of not private function _is_folder_exists($service, $folder_name) { $exists = false; $parameters['q'] = "mimeType='application/vnd.google-apps.folder' and trashed=false"; $files = $service->files->listFiles($parameters); if (in_array($folder_name, array_column((array) $files->files, 'name'))) { $exists = true; } return $exists; } //save all the folders and temporary files ID into database as serialized data private function _save_id($name = "", $id = "", $type = "folder", $path_type = "node") { if ($path_type == "parent") { //save parent folder id //save it individually because app title might be change later $this->Settings_model->save_setting("google_drive_parent_folder_id", $id); } else { $final_ids = array(); if ($type == "folder") { $setting_name = "google_drive_folder_ids"; $ids = get_setting($setting_name); } else { $setting_name = "google_drive_temp_file_ids"; $ids = get_setting($setting_name); } if (!empty($ids) && is_array(@unserialize($ids))) { $final_ids = unserialize($ids); } $final_ids[$name] = $id; $this->Settings_model->save_setting($setting_name, serialize($final_ids)); } } //download files public function download_file($file_id = "") { $service = $this->_get_drive_service(); $response = $service->files->get($file_id, array( 'alt' => 'media')); return $response->getBody()->getContents(); } //get service private function _get_drive_service() { $client = $this->_get_client_credentials(); $this->_check_access_token($client); return new \Google_Service_Drive($client); } //get folder and temp file ID private function _get_id($name = "", $type = "folder") { if ($type == "folder") { $stored_ids = get_setting("google_drive_folder_ids"); } else { $stored_ids = get_setting("google_drive_temp_file_ids"); } $ids = $stored_ids ? unserialize($stored_ids) : array(); //for temp file id, remove old one if ($type == "file" && get_array_value($ids, $name)) { $final_ids = $ids; unset($final_ids[$name]); $this->Settings_model->save_setting("google_drive_temp_file_ids", serialize($final_ids)); } return get_array_value($ids, $name); } //create folder private function _create_folder($folder_name = "", $path_type = "node") { $service = $this->_get_drive_service(); if (!$this->_is_folder_exists($service, $folder_name)) { $file = new \stdClass(); if ($path_type == "parent") { //create parent folder with app title //in future, all uploads will be into this folder $fileMetadata = new \Google_Service_Drive_DriveFile(array( 'name' => $folder_name, 'mimeType' => 'application/vnd.google-apps.folder') ); $file = $service->files->create($fileMetadata, array('fields' => 'id')); } else { //this are the node folders if (get_setting("google_drive_parent_folder_id")) { //check if the parent folder exists $fileMetadata = new \Google_Service_Drive_DriveFile(array( 'name' => $folder_name, 'parents' => array(get_setting("google_drive_parent_folder_id")), 'mimeType' => 'application/vnd.google-apps.folder', )); $file = $service->files->create($fileMetadata, array( 'uploadType' => 'multipart', 'fields' => 'id')); } else { $this->_create_folder(get_setting('app_title'), "parent"); } } //save folder id if (isset($file->id)) { $this->_save_id($folder_name, $file->id, "folder", $path_type); return $file->id; } else { return ""; } } else { return $this->_get_id($folder_name); } } //upload file to temp folder public function upload_file($temp_file, $file_name, $folder_name = "", $file_content = "") { $service = $this->_get_drive_service(); $folder_id = $this->_create_folder($folder_name); $fileMetadata = new \Google_Service_Drive_DriveFile(array( 'name' => $file_name, 'parents' => array($folder_id) )); if ($file_content) { //file contents $content = $file_content; $finfo = new \finfo(FILEINFO_MIME); $mime_type = $finfo->buffer($file_content); } else { //file path $content = file_get_contents($temp_file); $mime_type = mime_content_type($temp_file); } $file = $service->files->create($fileMetadata, array( 'data' => $content, 'mimeType' => $mime_type, 'uploadType' => 'multipart', 'fields' => 'id')); $this->_make_file_as_public($service, $file->id); //save id's for temp files if ($folder_name == "temp") { $this->_save_id($file_name, $file->id, "file"); } else { return array("file_name" => $file_name, "file_id" => $file->id, "service_type" => "google"); } } //make drive file as public private function _make_file_as_public($service, $file_id = "") { $permission = new \Google_Service_Drive_Permission(array( 'type' => 'anyone', 'role' => 'reader')); $service->permissions->create($file_id, $permission); } //move temp files to permanent directory public function move_temp_file($file_name, $new_filename, $folder_name) { $service = $this->_get_drive_service(); $fileId = $this->_get_id($file_name, "file"); $folderId = $this->_create_folder($folder_name); $emptyFileMetadata = new \Google_Service_Drive_DriveFile(); // Retrieve the existing parents to remove $file = $service->files->get($fileId, array('fields' => 'parents')); $previousParents = join(',', $file->parents); // Move the file to the new folder $file = $service->files->update($fileId, $emptyFileMetadata, array( 'addParents' => $folderId, 'removeParents' => $previousParents, 'fields' => 'id, parents')); //rename file with new name $this->_rename_file($service, $fileId, $new_filename); return array("file_name" => $new_filename, "file_id" => $fileId, "service_type" => "google"); } //rename file private function _rename_file($service, $file_id, $new_filename) { $file = new \Google_Service_Drive_DriveFile(); $file->setName($new_filename); $service->files->update($file_id, $file, array( 'fields' => 'name' )); } //delete file public function delete_file($file_id) { $service = $this->_get_drive_service(); $service->files->delete($file_id); } //get client credentials private function _get_client_credentials() { $url = get_uri("google_api/save_access_token"); $client = new \Google_Client(); $client->setApplicationName(get_setting('app_title')); $client->setRedirectUri($url); $client->setClientId(get_setting('google_drive_client_id')); $client->setClientSecret(get_setting('google_drive_client_secret')); $client->setScopes(\Google_Service_Drive::DRIVE); $client->setAccessType("offline"); $client->setPrompt('select_account consent'); return $client; } }

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