<?php
// File name:	upload.inc.php
// Description:	PHP subroutines to handle file uploads
// Date:	2004-07-06
// Author:	imacat <imacat@pristine.com.tw>
// Copyright:	Copyright (C) 2004-2007 Pristine Communications

// Set the include path
if (!defined("INCPATH_SET")) {
    require_once dirname(__FILE__) . "/incpath.inc.php";
}
// Referenced subroutines
require_once "monica/chkfunc.inc.php";
require_once "monica/gettext.inc.php";
require_once "monica/htmlchar.inc.php";
require_once "monica/newsn.inc.php";
require_once "monica/mimetype.inc.php";
require_once "monica/requri.inc.php";

// Settings
if (!defined("UPLOAD_DEPOSIT_MAX")) {
    define("UPLOAD_DEPOSIT_MAX", 20971520);
}
$FILE_TYPESUF_MAP = array(
    "application/vnd.oasis.opendocument.text"           => "odt",
    "application/vnd.oasis.opendocument.spreadsheet"    => "ods",
    "application/vnd.oasis.opendocument.presentation"   => "odp",
    "application/vnd.sun.xml.writer"                    => "sxw",
    "application/vnd.sun.xml.calc"                      => "sxc",
    "application/vnd.sun.xml.impress"                   => "sxi",
    "application/msword"                                => "doc",
    "application/vnd.ms-excel"                          => "xls",
    "application/vnd.ms-powerpoint"                     => "ppt",
    "image/png"                                         => "png",
    "image/jpeg"                                        => "jpg",
    "image/gif"                                         => "gif",
    "application/pdf"                                   => "pdf",
    "application/x-zip"                                 => "zip");

// suspend_file: Suspend a file to $_SESSION
function suspend_file($file)
{
    $FILES =& file_deposit();
    // Generate a new random file ID
    $fileid = new_sn_assoc($FILES);
    $file["sn"] = $fileid;
    // Save the current file
    $FILES[$fileid] =& $file;
    // Return the file ID
    return $fileid;
}

// savefile_exists: Check if a file exists
function savefile_exists($sn)
{
    // Check the validity of the serial number first
    if (!check_sn($sn)) {
        return false;
    }
    if (!array_key_exists($sn, file_deposit())) {
        return false;
    }
    return true;
}

// echo_file: Output a file element
function echo_file($file)
{
    $lines = array();
    $lines[] = sprintf(h(C_("MIME file type: %s")), h($file["type"]));
    $lines[] = sprintf(h(C_("File name: %s")), h($file["name"]));
    $lines[] = sprintf(h(C_("File size: %s bytes")), h($file["size"]));
    echo implode("<br />\n        ", $lines);
    return;
}

// file_deposit: Return the file deposit
function &file_deposit()
{
    // Session in use
    if (isset($_SESSION)) {
        if (!array_key_exists("savefile", $_SESSION)) {
            $_SESSION["savefile"] = array();
        }
        return $_SESSION["savefile"];
    
    // Session not in use
    } else {
        static $FILES = array();
        return $FILES;
    }
}

// clear_file_deposit: Clear the file deposit
function clear_file_deposit()
{
    $FILES =& file_deposit();
    $FILES = array();
    return;
}

// filecache: Return an appropriate fule cache
function &filecache($table)
{
    $FILES =& file_deposit();
    // Package specified
    $package = defined("PACKAGE")? PACKAGE: REQUEST_HOST;
    if (!array_key_exists("_cache", $FILES)) {
        $FILES["_cache"] = array();
    }
    if (!array_key_exists($package, $FILES["_cache"])) {
        $FILES["_cache"][$package] = array();
    }
    if (!array_key_exists($table, $FILES["_cache"][$package])) {
        $FILES["_cache"][$package][$table] = array();
    }
    return $FILES["_cache"][$package][$table];
}

// readfile_content: Read a file from its content into the file deposit
//   and return the fileid
function readfile_content($data, $filename, $sugtype, $sn, $table)
{
    $FILES =& file_deposit();
    $filecache =& filecache($table);
    
    // Cached
    if (    array_key_exists($sn, $filecache)
            && $data == $FILES[$filecache[$sn]]["content"]) {
        $fileid = $filecache[$sn];
    
    } else {
        // Create the file
        $file = array();
        $file["content"] = $data;
        $file["type"] = check_mime_type_content($data, $filename, $sugtype);
        $file["size"] = strlen($data);
        if (!is_null($filename)) {
            $file["name"] = $filename;
        }
        
        // Suspend the created picture
        $fileid = suspend_file($file);
        $filecache[$sn] = $fileid;
    }
    
    return $fileid;
}

?>