source: trunk/src/inc/FileHandler.class.php@ 7806

<?php
/*
 * Project: NodeMap2.0
 * File: FileHandler.class.php
 * Purpose: Checking and reading node files from the server
 */

class FileHandler {
        private $filename;
        private $handle;

        /*
         * Function: __construct (constructor)
         * Description: Handling with a node file
         * Parameters: string $filename, string $mode
         * Returns: true is we've succesfully opened the file, otherwise false
         */
        public function __construct($filename, $mode) {
                $this->filename = $filename;

                try {
                        trigger_log(SYSLOG_DEBUG, 'Opening the file "' . $this->filename . '"', __FILE__, __LINE__);
                        $this->handle = fopen($this->filename, $mode);
                } catch (Exception $err) {
                        trigger_log(SYSLOG_ERR, 'Reading from file "' . $this->filename . '" failed', __FILE__, __LINE__);
                        return false;
                }

                return true;
        }

        /*
         * Function: read
         * Description: Try to read the file we've opened in the constructor
         * Parameters: -
         * Returns: The content of the file if we can read from the file, otherwise false
         */
        public function read() {
                $file = '';

                try {
                        trigger_log(SYSLOG_DEBUG, 'Reading from file "' . $this->filename . '"', __FILE__, __LINE__);
                        $file = stream_get_contents($this->handle);
                } catch (Exception $err) {
                        trigger_log(SYSLOG_ERR, 'Reading from file "' . $this->filename . '" failed', __FILE__, __LINE__);
                        return false;
                }

                return $file;
        }

        /*
         * Function: write
         * Description: Try to write to the file we've opened in the constructor
         * Parameters: string $data
         * Returns: true if we can write to the file, otherwise false
         */
        public function write($data) {
                trigger_log(SYSLOG_DEBUG, 'Writing file "' . $this->filename . '"', __FILE__, __LINE__);

                try {
                        fwrite($this->handle, $data);
                } catch (Exception $err) {
                        trigger_log(SYSLOG_ERR, 'Couldn\'t write to file "' . $this->filename . '"', __FILE__, __LINE__);
                        return false;
                }

                return true;
        }

        public function __destruct() {
                trigger_log(SYSLOG_DEBUG, 'Closing file "' . $this->filename . '"', __FILE__, __LINE__);
                fclose($this->handle);
        }
}