<?php
/**
 * ChannelVariables facade implementation.
 *
 * PHP Version 5
 *
 * @category   Pagi
 * @package    ChannelVariables
 * @subpackage Impl
 * @author     Marcelo Gornstein <[email protected]>
 * @license    http://marcelog.github.com/PAGI/ Apache License 2.0
 * @version    SVN: $Id$
 * @link       http://marcelog.github.com/PAGI/
 *
 * Copyright 2011 Marcelo Gornstein <[email protected]>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
namespace PAGI\ChannelVariables\Impl;

use PAGI\ChannelVariables\IChannelVariables;

/**
 * ChannelVariables facade implementation.
 *
 * PHP Version 5
 *
 * @category   Pagi
 * @package    ChannelVariables
 * @subpackage Impl
 * @author     Marcelo Gornstein <[email protected]>
 * @license    http://marcelog.github.com/PAGI/ Apache License 2.0
 * @link       http://marcelog.github.com/PAGI/
 */
class ChannelVariablesFacade implements IChannelVariables
{
    /**
     * Channel variables given by asterisk.
     * @var string[]
     */
    private $variables;

    /**
     * AGI Arguments (agi_arg_N).
     * @var string[]
     */
    private $arguments;

    /**
     * Returns the given variable. Returns false if not set.
     *
     * @param string $key Variable to get.
     *
     * @return string
     */
    protected function getAGIVariable($key)
    {
        if (!isset($this->variables[$key])) {
            return false;
        }
        return $this->variables[$key];
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getChannel()
     */
    public function getChannel()
    {
        return $this->getAGIVariable('channel');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getLanguage()
     */
    public function getLanguage()
    {
        return $this->getAGIVariable('language');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getType()
     */
    public function getType()
    {
        return $this->getAGIVariable('type');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getUniqueId()
     */
    public function getUniqueId()
    {
        return $this->getAGIVariable('uniqueid');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getVersion()
     */
    public function getVersion()
    {
        return $this->getAGIVariable('version');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallerId()
     */
    public function getCallerId()
    {
        return $this->getAGIVariable('callerid');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallerIdName()
     */
    public function getCallerIdName()
    {
        return $this->getAGIVariable('calleridname');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallingPres()
     */
    public function getCallingPres()
    {
        return $this->getAGIVariable('callingpres');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallingAni2()
     */
    public function getCallingAni2()
    {
        return $this->getAGIVariable('callingani2');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallingTon()
     */
    public function getCallingTon()
    {
        return $this->getAGIVariable('callington');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getCallingTns()
     */
    public function getCallingTns()
    {
        return $this->getAGIVariable('callingtns');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDNID()
     */
    public function getDNID()
    {
        return $this->getAGIVariable('dnid');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getContext()
     */
    public function getContext()
    {
        return $this->getAGIVariable('context');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getRDNIS()
     */
    public function getRDNIS()
    {
        return $this->getAGIVariable('rdnis');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getRequest()
     */
    public function getRequest()
    {
        return $this->getAGIVariable('request');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDNIS()
     */
    public function getDNIS()
    {
        return $this->getAGIVariable('extension');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getThreadId()
     */
    public function getThreadId()
    {
        return $this->getAGIVariable('threadid');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getAccountCode()
     */
    public function getAccountCode()
    {
        return $this->getAGIVariable('accountcode');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getEnhanced()
     */
    public function getEnhanced()
    {
        return $this->getAGIVariable('enhanced');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getPriority()
     */
    public function getPriority()
    {
        return $this->getAGIVariable('priority');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getTotalArguments()
     */
    public function getTotalArguments()
    {
        return count($this->arguments);
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getArgument()
     */
    public function getArgument($index)
    {
        if (isset($this->arguments[$index])) {
            return $this->arguments[$index];
        }
        return false;
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getArguments()
     */
    public function getArguments()
    {
        return $this->arguments;
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryConfig()
     */
    public function getDirectoryConfig()
    {
        return getenv('AST_CONFIG_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getConfigFile()
     */
    public function getConfigFile()
    {
        return getenv('AST_CONFIG_FILE');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryModules()
     */
    public function getDirectoryModules()
    {
        return getenv('AST_MODULE_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectorySpool()
     */
    public function getDirectorySpool()
    {
        return getenv('AST_SPOOL_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryMonitor()
     */
    public function getDirectoryMonitor()
    {
        return getenv('AST_MONITOR_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryVar()
     */
    public function getDirectoryVar()
    {
        return getenv('AST_VAR_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryData()
     */
    public function getDirectoryData()
    {
        return getenv('AST_DATA_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryLog()
     */
    public function getDirectoryLog()
    {
        return getenv('AST_LOG_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryAgi()
     */
    public function getDirectoryAgi()
    {
        return getenv('AST_AGI_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryKey()
     */
    public function getDirectoryKey()
    {
        return getenv('AST_KEY_DIR');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getDirectoryRun()
     */
    public function getDirectoryRun()
    {
        return getenv('AST_RUN_DIR');
    }

    /**
     * Constructor.
     *
     * @param string[] $variables Initial channel variables given by asterisk.
     * @param string[] $arguments AGI arguments given by asterisk (agi_arg_N).
     *
     * @return void
     */
    public function __construct(array $variables, array $arguments)
    {
        $this->variables = $variables;
        $this->arguments = $arguments;
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getNetworkScript()
     */
    public function getNetworkScript()
    {
        return $this->getAGIVariable('network_script');
    }

    /**
     * (non-PHPdoc)
     * @see PAGI\ChannelVariables.IChannelVariables::getNetwork()
     */
    public function getNetwork()
    {
        return $this->getAGIVariable('network');
    }
}