class.ilLoggingActivity.php

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<?php
/* Copyright (c) 1998-2016 ILIAS open source, Extended GPL, see docs/LICENSE */
 
require_once './Services/WorkflowEngine/interfaces/ilActivity.php';
require_once './Services/WorkflowEngine/interfaces/ilWorkflowEngineElement.php';
require_once './Services/WorkflowEngine/interfaces/ilNode.php';
 
class ilLoggingActivity implements ilActivity, ilWorkflowEngineElement
{
    private $context;
 
    private $log_file = 'none.log';
 
    private $log_message = 'no message set';
 
    private $log_level = 'MESSAGE';
 
    protected $name;
 
    public function __construct(ilNode $a_context)
    {
        $this->context = $a_context;
    }
 
    public function setLogFile($a_log_file)
    {
        $extension = substr($a_log_file, strlen($a_log_file)-4, 4);
        $this->checkExtensionValidity($extension);
        $this->checkFileWriteability($a_log_file);
        $this->log_file = $a_log_file;
    }
 
    private function checkFileWriteability($a_log_file)
    {
        @$file_handle = fopen($a_log_file, 'a+');
        if ($file_handle == null) {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowFilesystemException.php';
            throw new ilWorkflowFilesystemException('Could not write to filesystem - no pointer returned.', 1002);
        }
        fclose($file_handle);
    }
 
    private function checkExtensionValidity($extension)
    {
        if ($extension != '.log' && $extension != '.txt') {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowObjectStateException.php';
            throw new ilWorkflowObjectStateException('Illegal extension. Log file must be either .txt or .log.', 1002);
        }
    }
 
    public function getLogFile()
    {
        return $this->log_file;
    }
 
    public function setLogMessage($a_log_message)
    {
        $this->checkForExistingLogMessageContent($a_log_message);
        $this->log_message = $a_log_message;
    }
 
    private function checkForExistingLogMessageContent($a_log_message)
    {
        if ($a_log_message == null || $a_log_message == '') {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowObjectStateException.php';
            throw new ilWorkflowObjectStateException('Log message must not be null or empty.', 1002);
        }
    }
 
    public function getLogMessage()
    {
        return $this->log_message;
    }
 
    public function setLogLevel($a_log_level)
    {
        $valid = $this->determineValidityOfLogLevel($a_log_level);
        if ($valid == false) {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowObjectStateException.php';
            throw new ilWorkflowObjectStateException('Log level must be one of: message, warning, debug, info, fatal.', 1002);
        }
        $this->log_level = strtoupper($a_log_level);
    }
 
    private function determineValidityOfLogLevel($a_log_level)
    {
        switch (strtolower($a_log_level)) {
            case 'trace':
            case 'message':
            case 'warning':
            case 'debug':
            case 'info':
            case 'fatal':
                $valid = true;
                break;
            default:
                $valid = false;
                return $valid;
        }
        return $valid;
    }
 
    public function getLogLevel()
    {
        return $this->log_level;
    }
 
    public function getContext()
    {
        return $this->context;
    }
 
    public function execute()
    {
        $file_pointer = null;
        $file_pointer = $this->acquireFilePointer();
        $this->writeLogMessage($file_pointer);
        $this->closeFilePointer($file_pointer);
    }
 
    private function closeFilePointer($file_pointer)
    {
        if (!fclose($file_pointer)) {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowFilesystemException.php';
            throw new ilWorkflowFilesystemException('Cannot write to filesystem - pointer returned did not close.', 1001);
        }
    }
 
    private function writeLogMessage($file_pointer)
    {
        require_once './Services/WorkflowEngine/classes/utils/class.ilWorkflowUtils.php';
        fwrite($file_pointer, date('Y/m/d H:i:s') . substr((string) ilWorkflowUtils::microtime(), 1, 6) . ' :: ');
        fwrite($file_pointer, $this->log_level . ' :: ');
        fwrite($file_pointer, $this->log_message . "\r\n");
    }
 
    private function acquireFilePointer()
    {
        $file_pointer = fopen($this->log_file, 'a');
        if ($file_pointer == null) {
            require_once './Services/WorkflowEngine/exceptions/ilWorkflowFilesystemException.php';
            throw new ilWorkflowFilesystemException('Cannot write to filesystem - no pointer returned.', 1000);
        }
        return $file_pointer;
    }
 
    public function setName($name)
    {
        $this->name = $name;
    }
 
    public function getName()
    {
        return $this->name;
    }
}