<?php
/**
 * Rename a file.
 *
 * Anwser to URL like the one below (names are base64_encoded)
 * index.php?task=task.file.rename&oldname=emEyJTJGYQ%3D%3D&newname=emEyJTJGYWVyYXpl
 */

namespace MarkNotes\Plugins\Task\File;

defined('_MARKNOTES') or die('No direct access allowed');

require_once dirname(__FILE__) . DS . '.plugin.php';

class Rename extends \MarkNotes\Plugins\Task\File
{
	protected static $me = __CLASS__;
	protected static $json_settings = 'plugins.task.file';
	protected static $json_options = '';

	/**
	 * Rename an existing note
	 */
	private static function rename(string $oldname, string $newname) : float
	{
		$aeFiles = \MarkNotes\Files::getInstance();
		$aeFolders = \MarkNotes\Folders::getInstance();
		$aeSettings = \MarkNotes\Settings::getInstance();

		if (trim($oldname) === '') {
			return FILE_ERROR;
		}

		// Sanitize filenames
		$oldname = $aeFiles->sanitize($oldname);
		$oldname = $aeSettings->getFolderWebRoot() . $oldname;
		$oldname = str_replace('/', DS, $oldname);

		$newname = $aeFiles->sanitize($newname);
		$newname = $aeSettings->getFolderWebRoot() . $newname;
		$newname = str_replace('/', DS, $newname);

		// Try to remove the folder, first, be sure that the user
		// can see the folder : if he can't, he can't delete it too
		$aeEvents = \MarkNotes\Events::getInstance();
		$aeEvents->loadPlugins('task.acls.cansee');

		// Note : the folder should start and end with the slash
		$arr = ['folder' => dirname($oldname), 'return' => true];
		$args = [&$arr];

		$aeEvents->trigger('task.acls.cansee::run', $args);

		// cansee will initialize return to 0 if the user can't
		// see the folder
		if (intval($args[0]['return']) === 1) {
			// Only if the user can see the parent folder,
			// he can rename files
			// Before renaming the file (f.i. note.md), check if
			// we've another files with the same name but with other
			// extensions (like note.json, note.html, ...) and
			// rename these files too.
			$arrFiles = $aeFolders->getContent(dirname($oldname));

			$wReturn = true;
			$old = $aeFiles->removeExtension(basename($oldname));
			$new = $aeFiles->removeExtension(basename($newname));

			foreach ($arrFiles as $file) {
				if ($file['type'] == 'file') {
					if ($file['filename'] == $old) {
						// Get the note's folder
						$dir = str_replace('/', DS, $file['dirname']);

						$dir = $aeFiles->makeFileNameAbsolute($dir);

						// The old filename (absolute path)
						$oldfile = $dir . DS . $file['basename'];

						// And the new one (absolute path)
						$newfile = $dir . DS . $new . '.' . $file['extension'];

						$wReturn = $aeFiles->rename($oldfile, $newfile);

						// Clear cache
						self::clearCache();
					}
				}
			}

			return $wReturn ? RENAME_SUCCESS : FILE_ERROR;
		} else {
			return NO_ACCESS;
		}
	}

	/**
	 * Rename a note on the disk
	 */
	public static function run(&$params = null) : bool
	{
		$aeFiles = \MarkNotes\Files::getInstance();
		$aeFunctions = \MarkNotes\Functions::getInstance();
		$aeSession = \MarkNotes\Session::getInstance();
		$aeSettings = \MarkNotes\Settings::getInstance();

		// Be sure that filenames doesn't already start
		// with the /docs folder
		self::cleanUp($params, $aeSettings->getFolderDocs(false));

		$newname = trim(urldecode($aeFunctions->getParam('param', 'string', '', true)));

		if ($newname != '') {
			$newname = $aeFiles->sanitize(trim($newname));
		}

		$oldname = trim(urldecode($aeFunctions->getParam('oldname', 'string', '', true)));

		if ($oldname != '') {
			$oldname = $aeFiles->sanitize(trim($oldname));
		}

		/*<!-- build:debug -->*/
		if ($aeSettings->getDebugMode()) {
			$aeDebug = \MarkNotes\Debug::getInstance();
			$aeDebug->log(__METHOD__, 'debug');
			$aeDebug->log('Oldname=[' . $oldname . ']', 'debug');
			$aeDebug->log('Newname=[' . $newname . ']', 'debug');
		}
		/*<!-- endbuild -->*/

		if (trim($newname) === '') {
			$return = [
				'status' => 0,
				'action' => 'rename',
				'msg' => $aeSettings->getText('unknown_error', 'An error has occured, please try again')
			];
		} else {
			$docs = str_replace('/', DS, $aeSettings->getFolderDocs(false));

			// Be sure to have the .md extension
			$oldname = $aeFiles->removeExtension($oldname) . '.md';
			$newname = $aeFiles->removeExtension($newname) . '.md';

			// Relative filenames
			$rel_oldname = str_replace($aeSettings->getFolderDocs(true), '', $oldname);
			$rel_newname = str_replace($aeSettings->getFolderDocs(true), '', $newname);

			$wReturn = self::rename($oldname, $newname);

			switch ($wReturn) {
				case RENAME_SUCCESS:
					$msg = $aeSettings->getText('file_renamed', 'The note [%1] has been renamed into [%2]');
					$msg = str_replace('$1', $rel_oldname, $msg);
					$msg = str_replace('$2', $rel_newname, $msg);
					break;
				case NO_ACCESS:
					// The parent folder is protected and the user has no access to it
					$msg = $aeSettings->getText('folder_parent_not_accessible', 'The parent folder of [$1] is not accessible to you');
					$msg = str_replace('$1', $rel_oldname, $msg);
					break;
				default:
					$msg = $aeSettings->getText('error_rename_file', 'An error has occured when trying to rename the note [%1] into [%2]');
					$msg = str_replace('$1', $rel_oldname, $msg);
					$msg = str_replace('$2', $rel_newname, $msg);
					break;
			} // switch ($wReturn)

			// and remove the extension
			// The filename should be something like
			// docs\christophe\newname
			// (not docs\christophe\newname.md)
			$md5 = md5($aeFiles->removeExtension($newname));

			$return = [
				'status' => (($wReturn == RENAME_SUCCESS) ? 1 : 0),
				'action' => 'rename',
				'msg' => $msg,
				'md5' => $md5,
				'filename' => utf8_encode($newname)
			];
		}

		header('Content-Type: application/json');
		echo self::returnInfo($return);

		return true;
	}
}
