<?php
/**
 * WPSEO plugin file.
 *
 * @package WPSEO\Admin\Formatter
 */

/**
 * This class provides data for the term metabox by return its values for localization.
 */
class WPSEO_Term_Metabox_Formatter implements WPSEO_Metabox_Formatter_Interface {

	/**
	 * The term the metabox formatter is for.
	 *
	 * @var WP_Term|stdClass
	 */
	private $term;

	/**
	 * The term's taxonomy.
	 *
	 * @var stdClass
	 */
	private $taxonomy;

	/**
	 * Array with the WPSEO_Titles options.
	 *
	 * @var array
	 */
	protected $options;

	/**
	 * WPSEO_Taxonomy_Scraper constructor.
	 *
	 * @param stdClass         $taxonomy Taxonomy.
	 * @param WP_Term|stdClass $term     Term.
	 */
	public function __construct( $taxonomy, $term ) {
		$this->taxonomy = $taxonomy;
		$this->term     = $term;
	}

	/**
	 * Returns the translated values.
	 *
	 * @return array
	 */
	public function get_values() {
		$values = [];

		// Todo: a column needs to be added on the termpages to add a filter for the keyword, so this can be used in the focus keyphrase doubles.
		if ( is_object( $this->term ) && property_exists( $this->term, 'taxonomy' ) ) {
			$values = [
				'search_url'          => $this->search_url(),
				'post_edit_url'       => $this->edit_url(),
				'base_url'            => $this->base_url_for_js(),
				'taxonomy'            => $this->term->taxonomy,
				'keyword_usage'       => $this->get_focus_keyword_usage(),
				'title_template'      => $this->get_title_template(),
				'metadesc_template'   => $this->get_metadesc_template(),
				'first_content_image' => $this->get_image_url(),
			];
		}

		return $values;
	}

	/**
	 * Gets the image URL for the term's social preview.
	 *
	 * @return string|null The image URL for the social preview.
	 */
	protected function get_image_url() {
		return WPSEO_Image_Utils::get_first_content_image_for_term( $this->term->term_id );
	}

	/**
	 * Returns the url to search for keyword for the taxonomy.
	 *
	 * @return string
	 */
	private function search_url() {
		return admin_url( 'edit-tags.php?taxonomy=' . $this->term->taxonomy . '&seo_kw_filter={keyword}' );
	}

	/**
	 * Returns the url to edit the taxonomy.
	 *
	 * @return string
	 */
	private function edit_url() {
		global $wp_version;
		$script_filename = version_compare( $wp_version, '4.5', '<' ) ? 'edit-tags' : 'term';
		return admin_url( $script_filename . '.php?action=edit&taxonomy=' . $this->term->taxonomy . '&tag_ID={id}' );
	}

	/**
	 * Returns a base URL for use in the JS, takes permalink structure into account.
	 *
	 * @return string
	 */
	private function base_url_for_js() {

		$base_url = home_url( '/', null );
		if ( ! WPSEO_Options::get( 'stripcategorybase', false ) ) {
			$base_url = trailingslashit( $base_url . $this->taxonomy->rewrite['slug'] );
		}

		return $base_url;
	}

	/**
	 * Counting the number of given keyword used for other term than given term_id.
	 *
	 * @return array
	 */
	private function get_focus_keyword_usage() {
		$focuskw = WPSEO_Taxonomy_Meta::get_term_meta( $this->term, $this->term->taxonomy, 'focuskw' );

		return WPSEO_Taxonomy_Meta::get_keyword_usage( $focuskw, $this->term->term_id, $this->term->taxonomy );
	}

	/**
	 * Retrieves the title template.
	 *
	 * @return string The title template.
	 */
	private function get_title_template() {
		$title = $this->get_template( 'title' );

		if ( $title === '' ) {
			return '%%title%% %%sep%% %%sitename%%';
		}

		return $title;
	}

	/**
	 * Retrieves the metadesc template.
	 *
	 * @return string
	 */
	private function get_metadesc_template() {
		return $this->get_template( 'metadesc' );
	}

	/**
	 * Retrieves a template.
	 *
	 * @param String $template_option_name The name of the option in which the template you want to get is saved.
	 *
	 * @return string
	 */
	private function get_template( $template_option_name ) {
		$needed_option = $template_option_name . '-tax-' . $this->term->taxonomy;
		return WPSEO_Options::get( $needed_option, '' );
	}
}
