<?php
defined( 'ABSPATH' ) || die( 'Cheatin\' uh?' );

class SQ_Models_Services_Keywords extends SQ_Models_Abstract_Seo {


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

		if ( isset( $this->_post->sq->doseo ) && $this->_post->sq->doseo ) {
			if ( ! $this->_post->sq->do_metas ) {
				add_filter( 'sq_description', array( $this, 'returnFalse' ) );

				return;
			}

			add_filter( 'sq_keywords', array( $this, 'generateKeywords' ) );
			add_filter( 'sq_keywords', array( $this, 'generateTags' ), 20 );
			add_filter( 'sq_keywords', array( $this, 'clearKeywords' ), 98 );
			add_filter( 'sq_keywords', array( $this, 'packKeywords' ), 99 );
		} else {
			add_filter( 'sq_keywords', array( $this, 'returnFalse' ) );
		}
	}

	public function generateKeywords( $keywords = '' ) {
		if ( ( $this->_post->sq->keywords <> - 1 ) && $this->_post->sq->keywords <> '' ) {
			$keywords = $this->_post->sq->keywords;
		}

		return $keywords;
	}

	public function generateTags( $keywords = '' ) {

		if ( SQ_Classes_Helpers_Tools::getOption( 'sq_keywordtag' ) ) {

			$posttags = get_the_tags( $this->_post->post_id );
			if ( ! empty( $posttags ) ) {
				foreach ( $posttags as $tag ) {
					$tags[] = $tag->name;
				}
				$keywords .= ( $keywords <> '' ? ',' : '' ) . join( ',', $tags );
			}
		}

		return $keywords;
	}

	public function packKeywords( $keywords = '' ) {
		if ( $keywords <> '' ) {

			$array_keywords = explode( ',', $keywords );
			if ( ! empty( $array_keywords ) ) {
				$array_keywords = array_unique( $array_keywords );
				$keywords       = join( ',', $array_keywords );
			}

			return sprintf( "<meta name=\"keywords\" content=\"%s\" />", $keywords );
		}

		return '';
	}
}