$authorData->lastModified ),
				'changefreq' => aioseo()->sitemap->priority->frequency( 'author' ),
				'priority'   => aioseo()->sitemap->priority->priority( 'author' )
			];
		}

		return apply_filters( 'aioseo_sitemap_author_archives', $entries );
	}

	/**
	 * Returns all data archive entries.
	 *
	 * @since 4.0.0
	 *
	 * @return array The sitemap entries.
	 */
	public function date() {
		if (
			! aioseo()->sitemap->helpers->lastModifiedPost() ||
			! aioseo()->options->sitemap->general->date ||
			! aioseo()->options->searchAppearance->archives->date->show ||
			(
				! aioseo()->options->searchAppearance->archives->date->advanced->robotsMeta->default &&
				aioseo()->options->searchAppearance->archives->date->advanced->robotsMeta->noindex
			) ||
			(
				aioseo()->options->searchAppearance->archives->date->advanced->robotsMeta->default &&
				(
					! aioseo()->options->searchAppearance->advanced->globalRobotsMeta->default &&
					aioseo()->options->searchAppearance->advanced->globalRobotsMeta->noindex
				)
			)
		) {
			return [];
		}

		$postsTable = aioseo()->core->db->db->posts;
		$dates      = aioseo()->core->db->execute(
			"SELECT
				YEAR(post_date) AS `year`,
				MONTH(post_date) AS `month`,
				post_date_gmt,
				post_modified_gmt
			FROM {$postsTable}
			WHERE post_type = 'post' AND post_status = 'publish'
			GROUP BY
				YEAR(post_date),
				MONTH(post_date)
			ORDER BY post_date ASC 
			LIMIT 50000",
			true
		)->result();

		if ( empty( $dates ) ) {
			return [];
		}

		$entries = [];
		$year    = '';
		foreach ( $dates as $date ) {
			$entry = [
				'lastmod'    => aioseo()->helpers->dateTimeToIso8601( $this->getLastModified( $date ) ),
				'changefreq' => aioseo()->sitemap->priority->frequency( 'date' ),
				'priority'   => aioseo()->sitemap->priority->priority( 'date' ),
			];

			// Include each year only once.
			if ( $year !== $date->year ) {
				$year         = $date->year;
				$entry['loc'] = get_year_link( $date->year );
				$entries[]    = $entry;
			}
			$entry['loc'] = get_month_link( $date->year, $date->month );
			$entries[]    = $entry;
		}

		return apply_filters( 'aioseo_sitemap_date_archives', $entries );
	}

	/**
	 * Returns all entries for the RSS Sitemap.
	 *
	 * @since 4.0.0
	 *
	 * @return array The sitemap entries.
	 */
	public function rss() {
		$posts = aioseo()->sitemap->query->posts(
			aioseo()->sitemap->helpers->includedPostTypes(),
			[ 'orderBy' => '`p`.`post_modified_gmt` DESC' ]
		);

		if ( ! count( $posts ) ) {
			return [];
		}

		$entries = [];
		foreach ( $posts as $post ) {
			$entry = [
				'guid'        => get_permalink( $post->ID ),
				'title'       => get_the_title( $post ),
				'description' => get_post_field( 'post_excerpt', $post->ID ),
				'pubDate'     => aioseo()->helpers->dateTimeToRfc822( $this->getLastModified( $post ) )
			];

			$entries[] = apply_filters( 'aioseo_sitemap_post_rss', $entry, $post->ID, $post->post_type, 'post' );
		}

		usort( $entries, function( $a, $b ) {
			return $a['pubDate'] < $b['pubDate'] ? 1 : 0;
		});

		return apply_filters( 'aioseo_sitemap_rss', $entries );
	}

	/**
	 * Returns the last modified date for a given post.
	 *
	 * @since 4.6.3
	 *
	 * @param  object $post The post object.
	 *
	 * @return string The last modified date.
	 */
	public function getLastModified( $post ) {
		$publishDate      = $post->post_date_gmt;
		$lastModifiedDate = $post->post_modified_gmt;

		// Get the date which is the latest.
		return $lastModifiedDate > $publishDate ? $lastModifiedDate : $publishDate;
	}
}