<?php
/**
 * Front-end output gate.
 *
 * @package ElevenRank
 * @since   1.0.0
 */

namespace ElevenRank;

defined( 'ABSPATH' ) || exit;

/**
 * Decides whether ElevenRank may print SEO tags on the front end.
 *
 * While another SEO plugin is active, output stays off so tags are not duplicated, until
 * the site owner turns on "Output SEO tags even if another SEO plugin is active".
 *
 * @since 1.0.0
 */
final class Output_Gate {

	/**
	 * Settings store.
	 *
	 * @since 1.0.0
	 *
	 * @var Settings
	 */
	private $settings;

	/**
	 * Conflict detector.
	 *
	 * @since 1.0.0
	 *
	 * @var Conflicts
	 */
	private $conflicts;

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 *
	 * @param Settings  $settings  Settings store.
	 * @param Conflicts $conflicts Conflict detector.
	 */
	public function __construct( Settings $settings, Conflicts $conflicts ) {
		$this->settings  = $settings;
		$this->conflicts = $conflicts;
	}

	/**
	 * Other SEO plugins that are active.
	 *
	 * @since 1.0.0
	 *
	 * @return array<string, string> Plugin id => display name.
	 */
	public function conflicts(): array {
		return $this->conflicts->detect();
	}

	/**
	 * Whether ElevenRank prints SEO tags.
	 *
	 * @since 1.0.0
	 *
	 * @return bool
	 */
	public function is_active(): bool {
		return array() === $this->conflicts() || (bool) $this->settings->value( 'general', 'output_with_conflicts' );
	}
}