PC Professionell 2004 December/PCpro_2004_12.ISO/files/webserver/tsw/TSW_3.4.0.exe/Apache2/admin/data_manager.FS.inc

Text File | 2003-03-16 | 4.4 KB | 199 lines

<?php
/////////////////////////////////////////////////////////
//
//    include/data_manager.FS.inc
//
//    (C)Copyright 2003 Ryo Chijiiwa <[e-mail]>
//
//    This file is part of IlohaMail. IlohaMail is free software released
//    under the GPL license.  See enclosed file COPYING for details, or
//    see http://www.fsf.org/copyleft/gpl.html
//
/////////////////////////////////////////////////////////

/********************************************************

    PURPOSE:
        Data handling abstraction class.
    PRE-CONDITIONS:
        $USER_DIR - Where user directories reside (e.g. "../users/")
    POST-CONDITIONS:
    COMMENTS:
        For FS based backend, $data will contain all data.

********************************************************/

include_once("../include/sort2darray.inc");

class DataManager_obj{
    var $user;
    var $host;
    var $storage;        //directory for FS backend, table nmae for DB
    var $location;        //file name for FS backend, user's ID for DB backend
    var $path;
    var $data;            //actually contains
    var $error;

    function initialize($user, $host, $location, $backend){
        global $USER_DIR;

        $this->error = "";

        $storage = $USER_DIR;
        $location = $location.".dat";

        if (!file_exists(realpath($storage))){
            $this->error = "Folder: $storage does not exist\n";
            return false;
        }

        $storage = $storage.ereg_replace("[\\/]", "", $user.".".$host);
        if (!file_exists(realpath($storage))){
            $this->error = "Folder: $storage does not exist\n";
            return false;
        }

        $this->storage = $storage;
        $this->location = $location;
        $this->path = $storage."/".$location;
        $this->user = $user;
        $this->host = $host;
        $this->data = false;

        return true;
    }

    function read(){
        $filePath = $this->path;
        $this->data = false;

        $fp = fopen($filePath, "a");        //force create file
        if ($fp) fclose($fp);

        $lines = file($filePath);

        if (is_array($lines)){
            $i=1;
            while ( list($key, $line) = each ($lines) ){
                $a = explode(",", chop($line));
                while ( list($k2, $data) = each($a) ){
                    list($type, $string) = explode(":", $data);
                    if ($type!="id") $string = base64_decode($string);
                    //$string = base64_decode($string);
                    $this->data[$i][$type] = $string;
                }
                $this->data[$i]["id"] = $i;
                $i++;
            }
        }else{
            $this->error.= "Failed to read from: $filePath.\n";
            $this->data = array();
        }

        return $this->data;
    }

    function save(){
        $filePath = $this->path;

        $fp = fopen($filePath, "w+");
        if ($fp){
            reset($this->data);
            $i=1;
            while ( list($key, $foo) = each($this->data)){
                $line="id:".$i;
                $this->data[$key]["id"] = $i;
                while ( list($k2, $val) = each($this->data[$key]))
                    if ($k2!="id") $line .= ",".$k2.":".base64_encode($val);
                fputs($fp, $line."\n");
                $i++;
            }
            fclose($fp);

            return true;
        }else{
            $this->error = "Couldn't open file \"$filePath\" for writing\n";
            return false;
        }
    }


    function delete($id){
        if (!$this->data) $this->read();
        $result = array();
        $deleted = false;

        reset($this->data);
        while ( list($k,$v) = each($this->data) ){
            if ($this->data[$k]["id"] != $id) $result[$k] = $this->data[$k];
            else $deleted = true;
        }
        if ($deleted){
            $this->data = $result;
            $this->save();
        }else{
            $this->error = "Delete failed: $id not found\n";
        }

        return $deleted;
    }

    function update($id, $array){
        if (!$this->data) $this->read();
        $updated = false;
        reset($this->data);
        while ( list($k,$v) = each($this->data) ){
            if ($this->data[$k]["id"]==$id){
                $this->data[$k] = $array;
                $updated = true;
            }
        }
        if ($updated) $this->save();
        else $this->error = "Update failed:  $id not found\n";

        return $updated;
    }

    function insert($array){
        if (!$this->data) $this->read();
        $this->data[] = $array;
        return $this->save();
    }


    function sort($field, $order){
        if (!$this->data) $this->read();
        $sort_a = explode(",", $field);
        $num_fields = count($sort_a);
        for ($i=$num_fields;$i>0;$i--){
            $this->data = sort2darray($this->data, $sort_a[$i-1], $order);
        }
        return $this->data;
    }


    function getDistinct($field, $order){
        $this->sort($field, $order);

        $index = array();
        $result = array();

        while ( list($k,$v) = each($this->data) ){
            $value = $this->data[$k][$field];
            if (empty($index[$value])){
                $index[$value] = 1;
                $result[] = $value;
            }
        }

        return $result;
    }


    function search($array){
    }

    function showError(){
        echo nl2br($this->error);
    }
}