<?php
/* Copyright (C) NAVER <http://www.navercorp.com> */
/**
 * Model class of the file module
 * @author NAVER (developers@xpressengine.com)
 */
class fileModel extends file
{
	/**
	 * Initialization
	 * @return void
	 */
	public function init()
	{
	}

	/**
	 * Return a file list attached in the document
	 *
	 * It is used when a file list of the upload_target_srl is requested for creating/updating a document.
	 * Attempt to replace with sever-side session if upload_target_srl is not yet determined
	 *
	 * @return void
	 */
	public function getFileList()
	{
		$file_list = [];
		$attached_size = 0;
		$editor_sequence = Context::get('editor_sequence');
		$upload_target_srl = Context::get('upload_target_srl') ?: 0;
		if(!$upload_target_srl && isset($_SESSION['upload_info'][$editor_sequence]))
		{
			$upload_target_srl = $_SESSION['upload_info'][$editor_sequence]->upload_target_srl;
		}
		
		// Get uploaded files
		if($upload_target_srl)
		{
			$oDocument = DocumentModel::getDocument($upload_target_srl);
			
			// Check permissions of the comment
			if(!$oDocument->isExists())
			{
				$oComment = CommentModel::getComment($upload_target_srl);
				if($oComment->isExists())
				{
					if(!$oComment->isAccessible())
					{
						throw new Rhymix\Framework\Exceptions\NotPermitted;
					}
					$oDocument = DocumentModel::getDocument($oComment->get('document_srl'));
				}
			}
			
			// Check permissions of the document
			if($oDocument->isExists() && !$oDocument->isAccessible())
			{
				throw new Rhymix\Framework\Exceptions\NotPermitted;
			}
			
			// Check permissions of the module
			if($module_srl = isset($oComment) ? $oComment->get('module_srl') : $oDocument->get('module_srl'))
			{
				$module_info = ModuleModel::getModuleInfoByModuleSrl($module_srl);
				if(empty($module_info->module_srl))
				{
					throw new Rhymix\Framework\Exceptions\NotPermitted;
				}
				$grant = ModuleModel::getGrant($module_info, Context::get('logged_info'));
				if(!$grant->access)
				{
					throw new Rhymix\Framework\Exceptions\NotPermitted;
				}
			}
			
			// Set file list
			foreach(self::getFiles($upload_target_srl) as $file_info)
			{
				$obj = new stdClass;
				$obj->file_srl = $file_info->file_srl;
				$obj->source_filename = $file_info->source_filename;
				$obj->thumbnail_filename = $file_info->thumbnail_filename;
				$obj->file_size = $file_info->file_size;
				$obj->disp_file_size = FileHandler::filesize($file_info->file_size);
				$obj->mime_type = $file_info->mime_type;
				$obj->original_type = $file_info->original_type;
				$obj->direct_download = $file_info->direct_download;
				$obj->cover_image = ($file_info->cover_image === 'Y') ? true : false;
				if($obj->direct_download === 'Y' && self::isDownloadable($file_info))
				{
					$obj->download_url = self::getDirectFileUrl($file_info->uploaded_filename);
				}
				else
				{
					$obj->download_url = self::getDirectFileUrl($file_info->download_url);
				}
				
				$file_list[] = $obj;
				$attached_size += $file_info->file_size;
			}
		}
		
		// Set output
		$this->add('files', $file_list);
		$this->add('attached_size', FileHandler::filesize($attached_size));
		$this->add('editor_sequence', $editor_sequence);
		$this->add('upload_target_srl', $upload_target_srl);
		
		// Set upload config
		$upload_config = self::getUploadConfig();
		if($this->user->isAdmin())
		{
			$this->add('allowed_filesize', sprintf('%s (%s)', lang('common.unlimited'), lang('common.admin')));
			$this->add('allowed_attach_size', sprintf('%s (%s)', lang('common.unlimited'), lang('common.admin')));
			$this->add('allowed_extensions', []);
		}
		else
		{
			$this->add('allowed_filesize', FileHandler::filesize($upload_config->allowed_filesize * 1024 * 1024));
			$this->add('allowed_attach_size', FileHandler::filesize($upload_config->allowed_attach_size * 1024 * 1024));
			$this->add('allowed_extensions', $upload_config->allowed_extensions);
		}
		
		// for compatibility
		$this->add('allowed_filetypes', $upload_config->allowed_filetypes);
		$this->add('upload_status', self::getUploadStatus($attached_size));
		$this->add('left_size', $upload_config->allowed_attach_size * 1024 * 1024 - $attached_size);
	}
	
	/**
	 * Check if the file is downloadable
	 *
	 * @param object $file_info
	 * @param object $member_info
	 * @return bool
	 */
	public static function isDownloadable($file_info, $member_info = null)
	{
		if(!$member_info)
		{
			$member_info = Rhymix\Framework\Session::getMemberInfo();
		}
		if(self::isDeletable($file_info, $member_info))
		{
			return true;
		}
		
		// Check the validity
		if($file_info->isvalid !== 'Y')
		{
			return false;
		}
		
		// Check download groups
		$config = self::getFileConfig($file_info->module_srl);
		if($config->download_groups)
		{
			if(empty($member_info->member_srl))
			{
				return false;
			}
			if(!isset($member_info->group_list))
			{
				$member_info->group_list = MemberModel::getMemberGroups($member_info->member_srl);
			}
			$is_group = false;
			foreach($config->download_groups as $group_srl)
			{
				if(isset($member_info->group_list[$group_srl]))
				{
					$is_group = true;
					break;
				}
			}
			if(!$is_group)
			{
				return false;
			}
		}
		
		return true;
	}
	
	/**
	 * Check if the file is deletable
	 *
	 * @param object $file_info
	 * @param object $member_info
	 * @return bool
	 */
	public static function isDeletable($file_info, $member_info = null)
	{
		if(!$member_info)
		{
			$member_info = Rhymix\Framework\Session::getMemberInfo();
		}
		if($member_info->is_admin === 'Y' || $member_info->member_srl == $file_info->member_srl)
		{
			return true;
		}
		if(isset($_SESSION['__XE_UPLOADING_FILES_INFO__'][$file_info->file_srl]))
		{
			return true;
		}
		
		// Check permissions of the module
		$module_info = ModuleModel::getModuleInfoByModuleSrl($file_info->module_srl);
		if(empty($module_info->module_srl))
		{
			return false;
		}
		$grant = ModuleModel::getGrant($module_info, $member_info);
		if($grant->manager)
		{
			return true;
		}
		
		// Check permissions of the document
		$oDocument = DocumentModel::getDocument($file_info->upload_target_srl);
		if($oDocument->isExists() && $oDocument->isGranted())
		{
			return true;
		}
		
		// Check permissions of the comment
		$oComment = CommentModel::getComment($file_info->upload_target_srl);
		if($oComment->isExists() && $oComment->isGranted())
		{
			return true;
		}
		
		return false;
	}
	
	/**
	 * Return number of attachments which belongs to a specific document
	 *
	 * @param int $upload_target_srl The sequence to get a number of files
	 * @return int Returns a number of files
	 */
	public static function getFilesCount($upload_target_srl)
	{
		$args = new stdClass();
		$args->upload_target_srl = $upload_target_srl;
		$output = executeQuery('file.getFilesCount', $args);
		return (int)$output->data->count;
	}

	/**
	 * Get a download path
	 *
	 * @param int $file_srl The sequence of file to get url
	 * @param string $sid
	 * @param int $unused (unused)
	 * @param string $source_filename
	 * @return string Returns a url
	 */
	public static function getDownloadUrl($file_srl, $sid, $unused = 0, $source_filename = null)
	{
		if ($source_filename && config('use_rewrite') && self::getFileConfig()->download_short_url === 'Y')
		{
			return sprintf('files/download/link/%d/%s/%s', $file_srl, $sid, rawurlencode(preg_replace('/\.\.+/', '.', $source_filename)));
		}
		else
		{
			return sprintf('index.php?module=%s&amp;act=%s&amp;file_srl=%s&amp;sid=%s', 'file', 'procFileDownload', $file_srl, $sid);
		}
	}
	
	/**
	 * Return direct download file url
	 *
	 * @param string $path
	 * @return string
	 */
	public static function getDirectFileUrl($path)
	{
		return \RX_BASEURL . ltrim($path, './');
	}
	
	/**
	 * Get file configurations
	 *
	 * @param int $module_srl If set this, returns specific module's configuration. Otherwise returns global configuration.
	 * @return object Returns configuration.
	 */
	public static function getFileConfig($module_srl = null)
	{
		$config = ModuleModel::getModuleConfig('file');
		$config = is_object($config) ? clone $config : new stdClass();
		if($module_srl)
		{
			$module_config = ModuleModel::getModulePartConfig('file', $module_srl);
			foreach((array)$module_config as $key => $value)
			{
				$config->$key = $value;
			}
		}
		
		// Default setting if not exists
		$config->allowed_filesize = $config->allowed_filesize ?? '2';
		$config->allowed_attach_size = $config->allowed_attach_size ?? '3';
		$config->allowed_filetypes = $config->allowed_filetypes ?? '*.*';
		$config->allow_outlink = $config->allow_outlink ?? 'Y';
		$config->download_grant = $config->download_grant ?? [];
		$config->download_short_url = $config->download_short_url ?? 'N';
		$config->inline_download_format = $config->inline_download_format ?? [];
		$config->image_autoconv = $config->image_autoconv ?? [];
		$config->image_quality_adjustment = $config->image_quality_adjustment ?? 75;
		$config->video_mp4_gif_time = $config->video_mp4_gif_time ?? 0;
		$config->ffmpeg_command = $config->ffmpeg_command ?? '/usr/bin/ffmpeg';
		$config->ffprobe_command = $config->ffprobe_command ?? '/usr/bin/ffprobe';
		
		// Set allowed_extensions
		if(!isset($config->allowed_extensions))
		{
			$config->allowed_extensions = [];
			$config->allowed_filetypes = trim($config->allowed_filetypes);
			if($config->allowed_filetypes !== '*.*')
			{
				$config->allowed_extensions = array_map(function($ext) {
					return strtolower(substr(strrchr(trim($ext), '.'), 1));
				}, explode(';', $config->allowed_filetypes));
			}
		}
		
		// Set download_groups
		$config->download_groups = is_array($config->download_grant) ? array_filter($config->download_grant) : [];
		
		return $config;
	}

	/**
	 * Get file information
	 *
	 * @param int $file_srl The sequence of file to get information
	 * @param array $columnList The list of columns to get from DB
	 * @return Object|object|array If error returns an instance of Object. If result set is one returns a object that contins file information. If result set is more than one returns array of object.
	 */
	public static function getFile($file_srl, $columnList = array())
	{
		$args = new stdClass();
		$args->file_srl = $file_srl;
		$output = executeQueryArray('file.getFile', $args, $columnList);
		if(!$output->toBool()) return $output;

		// old version compatibility
		if(count($output->data) == 1)
		{
			$file = $output->data[0];
			$file->download_url = self::getDownloadUrl($file->file_srl, $file->sid, 0, $file->source_filename);

			return $file;
		}
		else
		{
			$fileList = array();

			if(is_array($output->data))
			{
				foreach($output->data as $key=>$value)
				{
					$file = $value;
					$file->download_url = self::getDownloadUrl($file->file_srl, $file->sid, 0, $file->source_filename);
					$fileList[] = $file;
				}
			}
			return $fileList;
		}
	}

	/**
	 * Return all files which belong to a specific document
	 *
	 * @param int $upload_target_srl The sequence of target to get file list
	 * @param array $columnList The list of columns to get from DB
	 * @param string $sortIndex The column that used as sort index
	 * @return array Returns array of object that contains file information. If no result returns null.
	 */
	public static function getFiles($upload_target_srl, $columnList = array(), $sortIndex = 'file_srl', $ckValid = false)
	{
		$args = new stdClass();
		$args->upload_target_srl = $upload_target_srl;
		$args->sort_index = $sortIndex;
		if($ckValid) $args->isvalid = 'Y';
		$output = executeQueryArray('file.getFiles', $args, $columnList);
		if(!$output->data)
		{
			return array();
		}
		
		$fileList = array();
		foreach ($output->data as $file)
		{
			$file->source_filename = escape($file->source_filename, false);
			$file->download_url = self::getDownloadUrl($file->file_srl, $file->sid, 0, $file->source_filename);
			$fileList[] = $file;
		}
		return $fileList;
	}

	/**
	 * Return configurations of the attachement (it automatically checks if an administrator is)
	 *
	 * @return object Returns a file configuration of current module. If user is admin, returns PHP's max file size and allow all file types.
	 */
	public static function getUploadConfig()
	{
		$config = self::getFileConfig(Context::get('module_srl') ?: Context::get('current_module_info')->module_srl);
		if (Rhymix\Framework\Session::isAdmin())
		{
			$module_config = ModuleModel::getModuleConfig('file');
			$config->allowed_filesize = max($config->allowed_filesize, $module_config->allowed_filesize);
			$config->allowed_attach_size = max($config->allowed_attach_size, $module_config->allowed_attach_size);
			$config->allowed_extensions = [];
			$config->allowed_filetypes = '*.*';
		}
		return $config;
	}

	/**
	 * Return messages for file upload and it depends whether an admin is or not
	 *
	 * @param int $attached_size
	 * @return string
	 */
	public static function getUploadStatus($attached_size = 0)
	{
		$file_config = self::getUploadConfig();
		if (Context::get('allow_chunks') === 'Y')
		{
			$allowed_filesize = $file_config->allowed_filesize * 1024 * 1024;
		}
		else
		{
			$allowed_filesize = min($file_config->allowed_filesize * 1024 * 1024, FileHandler::returnBytes(ini_get('upload_max_filesize')), FileHandler::returnBytes(ini_get('post_max_size')));
		}
		
		// Display upload status
		$upload_status = sprintf(
			'%s : %s/ %s<br /> %s : %s (%s : %s)',
			lang('allowed_attach_size'),
			FileHandler::filesize($attached_size),
			FileHandler::filesize($file_config->allowed_attach_size*1024*1024),
			lang('allowed_filesize'),
			FileHandler::filesize($allowed_filesize),
			lang('allowed_filetypes'),
			$file_config->allowed_filetypes
		);
		return $upload_status;
	}

	/**
	 * method for compatibility
	 * 
	 * @deprecated
	 */
	public static function getFileModuleConfig($module_srl)
	{
		return self::getFileConfig($module_srl);
	}

	/**
	 * method for compatibility
	 * 
	 * @deprecated
	 */
	public static function getFileGrant($file_info, $member_info)
	{
		return (object)['is_deletable' => self::isDeletable($file_info, $member_info)];
	}
}
/* End of file file.model.php */
/* Location: ./modules/file/file.model.php */