CC-1695 Remove Campcaster Studio and make install easier

Changed backend dir to new structure

backend/cron/Cron.php

@@ -0,0 +1,214 @@
+<?php
+require_once (dirname(__FILE__).'/Crontab.php');
+require_once (dirname(__FILE__).'/../conf.php');
+/**
+ * This class can call a PHP function from crontab.
+ * Example:
+ * <pre>
+ *    $cron = new Cron();
+ *    $access = $cron->openCrontab('write');
+ *    if ($access != 'write') {
+ *        do {
+ *           $access = $cron->forceWriteable();
+ *        } while ($access != 'write');
+ *    }
+ *    $cron->addCronJob('*','*','*','*','*',
+ *              'ClassName',
+ *              array('first','secound','third')
+ *    );
+ *    $cron->closeCrontab();
+ * </pre>
+ * @package Campcaster
+ * @subpackage StorageServer.Cron
+ */
+class Cron {
+    /**
+     * @var Crontab
+     */
+    public $ct;
+
+    /**
+     * @var array This array created with getCommand() function
+     */
+    private $params;
+
+    /**
+     * @var string available values: read | write
+     */
+    private $ctAccess = 'read';
+
+    private $lockfile;
+    private $cronfile;
+    private $paramdir;
+    private $cronUserName;
+
+    /**
+     * Constructor
+     */
+    function Cron() {
+        global $CC_CONFIG;
+        $this->lockfile = $CC_CONFIG['lockfile'];
+        $this->cronfile = $CC_CONFIG['cronfile'];
+        $this->paramdir = $CC_CONFIG['paramdir'];
+        $this->cronUserName = $CC_CONFIG['cronUserName'];
+    }
+
+
+    /* ==================================================== Cronjob functions */
+    /**
+     * Add a cronjob to the crontab
+     *
+     * @access public
+     * @param string    $m          minute
+     * @param string    $h          hour
+     * @param string    $dom        day of month
+     * @param string    $mo         month
+     * @param string    $dow        day of week
+     * @param string    $className  name of class, which's execute() is called by croncall.php
+     * @param string    $params     the parameter(s)
+     * @return bool     true if success else PEAR error.
+     */
+    function addCronJob($m, $h, $dom, $mo, $dow, $className, $params)
+    {
+        if ($this->ctAccess == 'write') {
+            $this->ct->addCron($m, $h, $dom, $mo, $dow,
+                $this->getCommand($className, $params));
+            return true;
+        } else {
+            return PEAR::raiseError('CronJob::addCronJob : '.
+                'The crontab is not writable');
+        }
+    }
+
+    /**
+     * This function return with the active cronjobs
+     *
+     * @access public
+     * @return array array of cronjob struct
+     */
+    function listCronJob()
+    {
+        return $this->ct->getByType(CRON_CMD);
+    }
+
+    /**
+     * Remove a cronjob.
+     *
+     * @access public
+     * @param  int  $index index of the cronjobs' array.
+     * @return bool true if success else PEAR error.
+     */
+    function removeCronJob($index)
+    {
+        if ($this->ctAccess == 'write') {
+            $this->crontab->delEntry($index);
+            return true;
+        } else {
+            return PEAR::raiseError('CronJob::removeCronJob : '.
+                'The crontab is not writable');
+        }
+    }
+
+    /* ==================================================== Crontab functions */
+    /**
+     * Open the crontab
+     *
+     * @access public
+     * @param string $access only for listing 'read', for add and delete 'write'
+     * @return string sucessed access - available values read | write
+     */
+    function openCrontab($access = 'read')
+    {
+        $access = strtolower($access);
+        $this->ct = new Crontab($this->cronUserName);
+        if ($access == 'write' &&
+            $this->isCrontabWritable() &&
+            $this->lockCrontab()) {
+                $this->ctAccess = $access;
+        } else {
+            $this->ctAccess = 'read';
+        }
+        return $this->ctAccess;
+    }
+
+    /**
+     * Close the crontab
+     *
+     * @access public
+     * @return bool true if everything is ok, false is the lock file can't delete
+     */
+    function closeCrontab()
+    {
+        if ($this->ctAccess == 'write') {
+            $this->ct->writeCrontab();
+        }
+        return $this->ctAccess == 'write' ? $this->unlockCrontab() : true;
+    }
+
+    /**
+     * Check the crontab is writable
+     *
+     * @access private
+     * @return bool
+     */
+    function isCrontabWritable()
+    {
+        return !is_file($this->lockfile);
+    }
+
+    /**
+     * Try to lock the crontab
+     *
+     * @access private
+     * @return bool true if the locking is success
+     */
+    function lockCrontab()
+    {
+        return @touch($this->lockfile);
+    }
+
+    /**
+     * Try to unlock the crontab
+     *
+     * @access private
+     * @return bool true if the unlocking is success
+     */
+    function unlockCrontab()
+    {
+        return unlink($this->lockfile);
+    }
+
+    /**
+     * If the crontab opened with read access. This function force set
+     * the access to write.
+     *
+     * @access public
+     * @return bool true if the setting is success
+     */
+    function forceWriteable()
+    {
+        if ($this->isCrontabWritable() && $this->lockCrontab()) {
+            $this->ctAccess = 'write';
+            return true;
+        }
+        return false;
+    }
+
+    /* ======================================================= Misc functions */
+    /**
+     * Get the shell command for the cronjob
+     *
+     * @param string $className name of the class what is called by croncall.php
+     * @param mixed $params with this parameter could be called the execute() of class
+     * @return string shell command
+     */
+    function getCommand($className, $params)
+    {
+        $this->params = array (
+            'class' => $className,
+            'params' => $params
+        );
+        return $this->cronfile.' "'.str_replace('"','\"',serialize($this->params)).'"';
+    }
+}
+?>