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name : m_template.php
 <?php

/*
	Template Class
	Handle all templating tasks - displaying views, alerts, errors and view data
*/

class Template
{
	private $data;
	private $alert_types = array('success', 'alert', 'error');

	function __construct() {}

	/**
	 * Loads specified url
	 *
	 * @access	public
	 * @param	string, string
	 * @return	null
	 */
	public function load($url, $title = '')
	{
		if ($title != '') { $this->set_data('page_title', $title); }
		include($url);
	}

	/**
	 * Redirects to specified url
	 *
	 * @access	public
	 * @param	string
	 * @return	null
	 */
	public function redirect($url)
	{
		header("Location: $url");
		exit;
	}


	/*
		Get / Set Data
	*/

	/**
	 * Saves provided data for use by the view later
	 *
	 * @access	public
	 * @param	string, string, bool
	 * @return	null
	 */
	public function set_data($name, $value)
	{
		$this->data[$name] = htmlentities($value, ENT_QUOTES);
	}

	/**
	 * Retrieves data based on provided name for access by view
	 *
	 * @access	public
	 * @param	string, bool
	 * @return	string
	 */
	public function get_data($name)
	{
		if (isset($this->data[$name]))
		{
			return $this->data[$name];
		}
		return '';
	}


	/*
		Get / Set Alerts
	*/

	/**
	 * Sets a alert message stored in the session
	 *
	 * @access	public
	 * @param	string, string (optional)
	 * @return	null
	 */
	public function set_alert($value, $type = 'success')
	{
		$_SESSION[$type][] = $value;
	}



	/**
	 * Returns string, containing multiple list items of alerts
	 *
	 * @access	public
	 * @param
	 * @return	string
	 */

	public function get_alerts()
	{
		$data = '';

		foreach($this->alert_types as $alert)
		{
			if (isset($_SESSION[$alert]))
			{
				foreach($_SESSION[$alert] as $value)
				{
					echo '<div id="alert_div" class="alert_' . $alert . '">' . $value . '
					<div class="col-12 right"><a href=\'javascript::\' onclick=\'hide_div("alert_div")\'>[X]</a>
					</div>
					</div>';
				}
				unset($_SESSION[$alert]);
			}
		}
	}
}
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