source: pro-violet-viettel/sourcecode/application/modules/ajax/models/directory_model.php

<?php
/**
* Class Directory_model
*
* @author dzungnv02
*
*/
class Directory_model extends CI_Model 
{

        public function __construct()
        {
                // Call the Model constructor
                parent::__construct();
        }
        
        public function getAllDirectory () {
                $dbFile = 'directory.db';
                $h = fopen($dbFile, 'r');
                $line = '';
                $aryDir = array();
                $aryField = array ('id', 'name', 'parentID');
                
                while (($line = fgets($h, 4096)) !== false) {
                        $aryTmp = explode(',', trim($line));
                        $aryDir[] = array_combine($aryField, $aryTmp);
                }
                if (!feof($h)) {
                        echo "Error: unexpected fgets() fail\n";
                }
                fclose($h);
                
                return $aryDir;
        }
        
        public function getAllFile () {
                $dbFile = 'file.db';
                $h = fopen($dbFile, 'r');
                $line = '';
                $aryFile = array();
                $aryField = array ('id', 'name', 'minetype', 'size', 'parentID');
        
                while (($line = fgets($h, 4096)) !== false) {
                        $aryTmp = explode(',', trim($line));
                        $aryFile[] = array_combine($aryField, $aryTmp);
                }
                if (!feof($h)) {
                        echo "Error: unexpected fgets() fail\n";
                }
                fclose($h);
        
                return $aryFile;
        }
        
        public function createDir($aryDir) {
                $dbFile = 'directory.db';
                $aryField = array ('id', 'name', 'parentID');
                $aryTmp = array();
                $h = fopen($dbFile, 'a');
                $line = '';
                foreach ($aryField as $key => $field) {
                        $aryTmp[$field] = $aryDir[$field];
                }
                $line = implode(',',$aryTmp);
                fwrite($h, $line."\n");
                fclose($h);
                return true;
        }
        
        public function createFile($aryFile) {
                $dbFile = 'file.db';
                $aryField = array ('id', 'name', 'minetype', 'size', 'parentID');
                $aryTmp = array();
                $h = fopen($dbFile, 'a+');
                $line = '';
                foreach ($aryField as $key => $field) {
                        $aryTmp[$field] = $aryFile[$field];
                }
                $line = implode(',',$aryTmp);
                fwrite($line."\n", $h);
                fclose($h);
                return true;
        }
        
        public function deleteDir ($dirID, $delAllChild = FALSE) {
                $dbFile = 'directory.db';
                $dirList = $this->getAllDirectory();
                
                $lineNumber = 0;
                
                foreach ($dirList as $key => $dir) {
                        if ($dir[0] == $dirID) {
                                $lineNumber = $key;
                        }
                }       
                
                //$aryChildDir =  
                
                if ($delAllChild) {
                        
                }
                
                unset($dirList[$lineNumber]);
                return $this->writeDB ($dbFile, $dirList);
        }
        
        public function deleteFile ($fileID) {
                $dbFile = 'file.db';
                $fileList = $this->getAllFile();
                
                $lineNumber = 0;
                
                foreach ($fileList as $key => $file) {
                        if ($dir[0] == $dirID) {
                                $lineNumber = $key;
                        }
                }
                
                unset($fileList[$lineNumber]);
                return $this->writeDB ($dbFile, $fileList);
        }
        
        public function getAllFileChild ($dirID) {
                $fileList = $this->getAllFile();
                $aryChild = array();
                
                $aryDirChild = $this->getAllDirChild($dirID);
                
                foreach ($aryDirChild as $key => $child) {
                        
                } 
                
        }
        
        public function getAllDirChild ($dirID) {
                $dirList = $this->getAllDirectory();
                $aryChild = array();
                
                foreach ($dirList as $key => $dir) {
                        if ($dir['parentID'] == $dirID) {
                                $aryChild[$dir['id']] = $dir;
                                
                                $aryChild[$dir['id']]['child'] = $this->getAllDirChild($dir['id']);
                                if (count($aryChild[$dir['id']]['child']) == 0) unset($aryChild[$dir['id']]['child']);
                        }
                }
                
                return $aryChild;
        }
        
        private function writeDB ($file, $aryDataSet, $flag = '') {
                $flag = ($flag == 'append') ? 'a' : 'w';
                
                if (file_exists($file) && count($aryDataSet) > 0) {
                        $h = fopen ($file, $flag);
                        foreach ($aryDataSet as $key => $aryTmp) {
                                $line = implode(',',$aryTmp);
                                fwrite($h, $line."\n");
                        }
                        fclose ($h);
                        
                        return true;
                }else {
                        return false;
                }
        }
        
        public function getMaxID($isDir) {
                $list = $isDir = true ? $this->getAllDirectory() : $this->getAllFile();
                $maxID = 0;
                foreach ($list as $key => $e) {
                        if ($e['id'] > $maxID) $maxID = $e['id'];
                }
                
                return $maxID;
        }
        
        public function rename ($id, $newName, $type = 'directory') {
                
                if (!$newName || !$id) return FALSE;
                $aryObj = $type == 'directory' ? $this->getAllDirectory() : $this->getAllFile();
                $dbFile = $type == 'directory' ? $dbFile = 'directory.db' : $dbFile = 'file.db';
                
                if (count($aryObj) > 0) {
                        foreach ($aryObj as $key => $obj) {
                                if ($obj['id'] == $id) break;
                        }
                        
                        $aryObj[$key]['name'] = $newName;
                        
                        return $this->writeDB($dbFile, $aryObj);
                }
                
                return FALSE;
        }
        
}