<?php

/**

 * A plugin to use predefined and user-generated text bricks.

 *

 **/

class Bricks extends Plugin

{

	private $bricks_found;

	private $post;

	private $bricks = array();



	/**

	 * Set up some default options

	 *

	 **/

	public function action_plugin_activation($file)

	{

		

	}



	/**

	 * Create plugin configuration menu entry

	 **/

	public function filter_plugin_config( $actions, $plugin_id )

	{

		if ( $plugin_id == $this->plugin_id() ) {

			$actions[] = _t('Configure');

		}

		return $actions;

	}



	/**

	 * Create plugin configuration

	 **/

	public function action_plugin_ui($plugin_id, $action)

	{

		if ($plugin_id == $this->plugin_id()) {

			switch($action) {

				case _t('Configure'):

					$ui = new FormUI('postfields');

					$ui->append('static', 'typelabel', _t('Add bricks', array('keine ahnung','unsicher')));

					$ui->append('textmulti', 'bricks', 'bricks_bricks', 'Available bricks:');

					$ui->append('submit', 'submit', 'Submit');

					$ui->out();

			}

		}

	}

	

	// DEBUGGING CRAP

	// Displays the available bricks in the publish form

	// No functionality, only for viewing

	// Will be replaced by something better later

	/*

	public function action_form_publish($form, $post)

	{

		$bricks = Options::get('bricks_bricks');

		if(!is_array($bricks) || count($bricks) == 0) {

			return;

		}

		$output = '';

		$control_id = 0;

		$postbricks = $form->publish_controls->append('fieldset', 'postbricks', 'Available bricks');

		foreach($bricks as $brick)

		{

			//skip invalid bricks

			if(!strpos($brick,'=')) continue;

			list($bricktext, $brickvalue) = explode("=",$brick,2);

			$control_id = md5($bricktext);

			$fieldname = "postbrick_{$control_id}";

			$custombrick = $postbricks->append('text', $fieldname, 'null:null', $bricktext);

			$custombrick->value = $brickvalue;

			$custombrick->template = 'tabcontrol_text';

		}

	}*/



	/**

	 * Add help text to plugin configuration page

	 **/

	public function help()

	{

		// eeh? How is this used to display sourcecode?

		$help = _t( 'Usage: Enter brickname=brickvalue in one of the fields in the configuration. Brickname can contain a-Z, 0-9, underscores and dashes. Brickvalue can be anything. Be careful with html, Habari sometimes messes it up. In post content, use {brickname} and it will be replaced with brickvalue automatically when the post is displayed. {i} is a predefined brick that inserts your current Habari base path so you can create internal links using {i}slug.', 'bricks' );

		return $help;

	}



	/**

	 * Nothing to do here atm

	 **/

	public function action_init()

	{

		

	}



	/**

	 * This is where the stuff happens.

	 * All bricks in the post content will be replaced with their values.

	 **/

	public function filter_post_content( $content, $post )

	{

		// If we're on the publish page, replacement will be destructive.

		// We don't want that, so return here.

		$handler = Controller::get_handler();

		if ( isset( $handler->action ) && $handler->action == 'admin' && isset($handler->handler_vars['page']) && $handler->handler_vars['page'] == 'publish' ) {

			return $content;

		}

	

		// Get available bricks

		$bricklist = Options::get('bricks_bricks');

		foreach($bricklist as $brickentry)

		{

			//skip invalid bricks (bricks without value)

			if(!strpos($brickentry,'=')) continue;

			list($key, $value) = explode('=', $brickentry, 2);

			$this->bricks[$key] = $value;

		}

		

		// Add predefined bricks

		$this->bricks['i'] = Site::get_url('habari') . "/";

		

		if(!is_array($this->bricks) || count($this->bricks) == 0) {

			return $content;

		}



		$this->post = $post;

		

		// Scan for bricks and replace matches with their values

		$return = preg_replace_callback( '/({[a-zA-Z0-9\-_]+})/Us', array($this, 'brickit'), $content );



		if ( !$this->bricks_found ) {

			return $content;

		}



		return $return;

	} 

	

	// This is called for each found brick in the post

	// $matches contains the brick twice because it is found with a subexp in (), we will only use the direct match

	private function brickit( $matches )

	{

		// Get brickname without {}

		$brickname = substr($matches[1], 1, strlen($matches[1])-2);

		if(array_key_exists($brickname, $this->bricks))

		{

			$this->bricks_found = true;

			return $this->bricks[$brickname];

		}

		else return $matches[1];

	}



	// public function action_update_check () {

		// Update::add( 'bricks', '', $this->info->version );

	// }

}



?>