SystemProperty_model

gistfile1.php

<?php
abstract class M3SystemProperty_model extends MY_Model
{
	/**
	 * @var M3SystemProperty_model
	 */
	protected $system_property_api = null;
	protected $system_property_cache = array('enabled'=>FALSE, 'expiry'=>300, 'driver'=>null);
	protected static $GET_SYSTEM_PROPERTY = '/system/property/%s';

	public function __construct()
	{
		parent::__construct();

		// System Property Config
		$system_property_config = $this->config->item('system_property');

		// Cache System Property
		$this->system_property_cache['enabled'] = !empty($system_property_config['cache']['enabled']);
		if($this->system_property_cache['enabled'])
		{
			$this->load->driver('cache');
			$this->system_property_cache['expiry'] = (isset($system_property_config['cache']['expiry']) ? $system_property_config['cache']['expiry'] : 300);
			$this->system_property_cache['driver'] = $this->cache->xcache;
		}
	}

	const INVALID_KEY_HOLDER = '!!INVALID_SYSTEM_PROPERTY_KEY';
	private function get_property($property_name)
	{
		if (! ($this->system_property_api instanceof M3api))
			// meant to be an uncaught exception
			throw new Exception('SystemProperty_model needs to be instantiated');
		try
		{
			$key = sprintf(self::$GET_SYSTEM_PROPERTY, $property_name);

			if($this->system_property_cache['enabled'])
			{
				$system_property = $this->system_property_cache['driver']->get($key);

				if ($system_property == self::INVALID_KEY_HOLDER)
					throw new Exception(self::INVALID_KEY_HOLDER . ': ' . $key);

				if(is_null($system_property))
				{
					try
					{
						$system_property = $this->system_property_api->get($key);
						$this->system_property_cache['driver']->save(
							  $key
							, $system_property
							, $this->system_property_cache['expiry']
						);
					}
					catch (Exception $ex)
					{
						// Put a holder in place to preven repetitive calls to the API
						$this->system_property_cache['driver']->save(
							  $key
							, self::INVALID_KEY_HOLDER
							, $this->system_property_cache['expiry']
						);
					}
				}

				return $system_property;
			}
			else
			{
				return $this->system_property_api->get($key);
			}
		}
		catch(Exception $ex)
		{
			return null;
		}
	}

	public function get_boolean($property_name, $property_default_value = null)
	{
		$value = $this->get_property($property_name);
		if($value === 'false')
			$value = false;

		return is_null($value) ? $property_default_value : (boolean) trim($value);
	}

	public function get_float($property_name, $property_default_value = null)
	{
		$value = $this->get_property($property_name);
		return is_null($value) ? $property_default_value : (float) trim($value);
	}

	public function get_integer($property_name, $property_default_value = null)
	{
		$value = $this->get_property($property_name);
		return is_null($value) ? $property_default_value : (integer) trim($value);
	}

	public function get_string($property_name, $property_default_value = null)
	{
		$value = $this->get_property($property_name);
		return is_null($value) ? $property_default_value : $value;
	}

    public function get_array($property_name, $property_default_value = null, $delimiter = ';')
    {
        $value = $this->get_property($property_name);
        return is_null($value) ? $property_default_value: explode($delimiter, $value);
    }
}
?>