<?php

class StaticFront extends Plugin
{

	const VERSION= '0.3';

	/**
	 * Return plugin metadata for this plugin
	 *
	 * @return array Plugin metadata
	 */
	public function info()
	{
		return array(
			'url' => 'http://habariproject.org',
			'name' => 'StaticFront',
			'license' => 'Apache License 2.0',
			'author' => 'The Habari Community',
			'version' => self::VERSION,
			'description' => 'Allows you to set a page to show as the home page.'
		);
	}
	
	public function action_plugin_activation( $file )
	{
		if ( realpath( $file ) == __FILE__ ) {
			Options::set( 'staticfront__page', 'none' );
			Options::set( 'staticfront__blog_index', 'blog' );
			Options::set( 'staticfront__keep_pages', TRUE );
		}
	}

	/**
	 * Add update beacon support
	 **/
	public function action_update_check()
	{
	 	Update::add( 'StaticFront', 'cc3fd1b0-3bca-11dd-ae16-0800200c9a66', $this->info->version );
	}

	/* Set up options */
	public function filter_plugin_config( $actions, $plugin_id )
	{
		if ( $plugin_id == $this->plugin_id() ) {
			$actions[]= _t('Configure', 'staticfront');
		}
		return $actions;
	}

	public function action_plugin_ui( $plugin_id, $action )
	{
		if ( $plugin_id == $this->plugin_id() ) {
			switch ( $action ) {
				case _t('Configure', 'staticfront') :
					$ui= new FormUI( 'staticfront' );
					$page= $ui->append( 'select', 'page', 'staticfront__page', _t('The page to show for the home page: ', 'staticfront') );
					$page->options['none']= _t('Show Normal Posts', 'staticfront');
					foreach( $this->get_all_pages() as $post ) {
						$page->options[$post->slug]= $post->title;
					}
					$blog_index= $ui->append( 'text', 'blog_index', 'staticfront__blog_index', sprintf( _t('Show normal posts at this URL: <b>%s</b>', 'staticfront'), Site::get_url( 'habari', true ) ) );

					$blog_index->add_validator( 'validate_required' );

					$keep_pages= $ui->append( 'checkbox', 'keep_pages', 'staticfront__keep_pages', _t( 'Show static pages at base url: ', 'staticfront' ) );

					$ui->append( 'submit', 'save', _t('Save') );
					$ui->success( array( $this, 'updated_config' ) );
					$ui->out(); 
					break;
			}
		}
	}
	
	public function updated_config( $ui )
	{
		Session::notice( 'StaticFront options updated!' );
		$ui->save;
	}

	private function get_all_pages()
	{
		$pages= Posts::get( array( 'content_type' => Post::type('page'), 'nolimit' => 1 ) );
		return $pages;
	}

	public function filter_theme_act_display_home( $handled, $theme )
	{
		$page= Options::get( 'staticfront__page' );
		if ( $page && $page != 'none' ) {
			$post= Post::get( array( 'slug' => $page ) );
			$theme->act_display( array( 'posts' => $post ) );
			return TRUE;
		}
		return FALSE;
	}

	public function filter_theme_act_display_blog_home( $handled, $theme )
	{
		$page= Options::get( 'staticfront__page' );
		if ( $page && $page != 'none' ) {
			$paramarray['fallback']= array(
				'{$type}.multiple',
				'multiple',
			);
 
			// Makes sure home displays only entries
			$paramarray['user_filters']= array(
				'content_type' => Post::type('entry'),
			);
 
			$theme->act_display( $paramarray );
			return TRUE;
		}

		return FALSE;
	}

	public function filter_rewrite_rules( $rules )
	{
		if ( Options::get( 'staticfront__page' ) != 'none' ) {

			$base= trim( Options::get( 'staticfront__blog_index' ) , '/' );
			$stay= Options::get( 'staticfront__keep_pages' );

			$move =  array(
				'display_entries_by_date' => $base . '/',
				'display_entry' => $base . '/',
				'display_entries' => $base . '/',
				'display_entries_by_tag' => $base . '/',
				'display_search' => $base . '/',
				'display_page' => $base . '/',
				'display_404' => $base . '/',
			);
			if( Options::get( 'staticfront__keep_pages' ) ) {
				$move['display_page'] = '';
			}

			foreach( $rules as $rule ) {
				if( isset( $move[$rule->name] ) && strpos( $rule->build_str, $base . '/' ) === FALSE ) {
					$rule->parse_regex= substr( $rule->parse_regex, 0, 2 ) . $move[$rule->name] . substr( $rule->parse_regex, 2 );
					$rule->build_str= $move[$rule->name] . $rule->build_str;
				}
			}

			$rules[] = new RewriteRule(array(
				'name' => 'display_blog_home',
				'parse_regex' => '%^' . $base . '(?:/page/(?P<page>\d+))?/?$%',
				'build_str' => '' . $base . '(/page/{$page})',
				'handler' => 'UserThemeHandler',
				'action' => 'display_blog_home',
				'priority' => 1,
				'rule_class' => RewriteRule::RULE_PLUGIN,
				'is_active' => 1,
				'description' => 'Blog index display for StaticFront' )
				);
		}
		return $rules;
	}
}

?>