<?php

/**

 * Bookmark Template Functions for usage in Themes

 *

 * @package WordPress

 * @subpackage Template

 */

/**

 * The formatted output of a list of bookmarks.

 *

 * The $bookmarks array must contain bookmark objects and will be iterated over

 * to retrieve the bookmark to be used in the output.

 *

 * The output is formatted as HTML with no way to change that format. However,

 * what is between, before, and after can be changed. The link itself will be

 * HTML.

 *

 * This function is used internally by wp_list_bookmarks() and should not be

 * used by themes.

 *

 * @since 2.1.0

 * @access private

 *

 * @param array        $bookmarks List of bookmarks to traverse.

 * @param string|array $args {

 *     Optional. Bookmarks arguments.

 *

 *     @type int|bool $show_updated     Whether to show the time the bookmark was last updated.

 *                                      Accepts 1|true or 0|false. Default 0|false.

 *     @type int|bool $show_description Whether to show the bookmark description. Accepts 1|true,

 *                                      Accepts 1|true or 0|false. Default 0|false.

 *     @type int|bool $show_images      Whether to show the link image if available. Accepts 1|true

 *                                      or 0|false. Default 1|true.

 *     @type int|bool $show_name        Whether to show link name if available. Accepts 1|true or

 *                                      0|false. Default 0|false.

 *     @type string   $before           The HTML or text to prepend to each bookmark. Default `<li>`.

 *     @type string   $after            The HTML or text to append to each bookmark. Default `</li>`.

 *     @type string   $link_before      The HTML or text to prepend to each bookmark inside the anchor

 *                                      tags. Default empty.

 *     @type string   $link_after       The HTML or text to append to each bookmark inside the anchor

 *                                      tags. Default empty.

 *     @type string   $between          The string for use in between the link, description, and image.

 *                                      Default "\n".

 *     @type int|bool $show_rating      Whether to show the link rating. Accepts 1|true or 0|false.

 *                                      Default 0|false.

 *

 * }

 * @return string Formatted output in HTML

 */

function _walk_bookmarks( $bookmarks, $args = '' ) {

	$defaults = array(

		'show_updated'     => 0,

		'show_description' => 0,

		'show_images'      => 1,

		'show_name'        => 0,

		'before'           => '<li>',

		'after'            => '</li>',

		'between'          => "\n",

		'show_rating'      => 0,

		'link_before'      => '',

		'link_after'       => '',

	);

	$parsed_args = wp_parse_args( $args, $defaults );

	$output = ''; // Blank string to start with.

	foreach ( (array) $bookmarks as $bookmark ) {

		if ( ! isset( $bookmark->recently_updated ) ) {

			$bookmark->recently_updated = false;

		}

		$output .= $parsed_args['before'];

		if ( $parsed_args['show_updated'] && $bookmark->recently_updated ) {

			$output .= '<em>';

		}

		$the_link = '#';

		if ( ! empty( $bookmark->link_url ) ) {

			$the_link = esc_url( $bookmark->link_url );

		}

		$desc  = esc_attr( sanitize_bookmark_field( 'link_description', $bookmark->link_description, $bookmark->link_id, 'display' ) );

		$name  = esc_attr( sanitize_bookmark_field( 'link_name', $bookmark->link_name, $bookmark->link_id, 'display' ) );

		$title = $desc;

		if ( $parsed_args['show_updated'] ) {

			if ( '00' !== substr( $bookmark->link_updated_f, 0, 2 ) ) {

				$title .= ' (';

				$title .= sprintf(

					/* translators: %s: Date and time of last update. */

					__( 'Last updated: %s' ),

					gmdate(

						get_option( 'links_updated_date_format' ),

						$bookmark->link_updated_f + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS )

					)

				);

				$title .= ')';

			}

		}

		$alt = ' alt="' . $name . ( $parsed_args['show_description'] ? ' ' . $title : '' ) . '"';

		if ( '' !== $title ) {

			$title = ' title="' . $title . '"';

		}

		$rel = $bookmark->link_rel;

		if ( '' !== $rel ) {

			$rel = ' rel="' . esc_attr( $rel ) . '"';

		}

		$output .= '<a href="' . $the_link . '"' . $rel . $title . $target . '>';

		$output .= $parsed_args['link_before'];

		if ( null != $bookmark->link_image && $parsed_args['show_images'] ) {

			if ( strpos( $bookmark->link_image, 'http' ) === 0 ) {

				$output .= "<img src=\"$bookmark->link_image\" $alt $title />";

			} else { // If it's a relative path.

				$output .= '<img src="' . get_option( 'siteurl' ) . "$bookmark->link_image\" $alt $title />";

			}

			if ( $parsed_args['show_name'] ) {

				$output .= " $name";

			}

		} else {

			$output .= $name;

		}

		$output .= $parsed_args['link_after'];

		$output .= '</a>';

		if ( $parsed_args['show_updated'] && $bookmark->recently_updated ) {

			$output .= '</em>';

		}

		if ( $parsed_args['show_description'] && '' !== $desc ) {

			$output .= $parsed_args['between'] . $desc;

		}

		if ( $parsed_args['show_rating'] ) {

			$output .= $parsed_args['between'] . sanitize_bookmark_field(

				'link_rating',

				$bookmark->link_rating,

				$bookmark->link_id,

				'display'

			);

		}

		$output .= $parsed_args['after'] . "\n";

	} // End while.

	return $output;

}

/**

 * Retrieve or echo all of the bookmarks.

 *

 * List of default arguments are as follows:

 *

 * These options define how the Category name will appear before the category

 * links are displayed, if 'categorize' is 1. If 'categorize' is 0, then it will

 * display for only the 'title_li' string and only if 'title_li' is not empty.

 *

 * @since 2.1.0

 *

 * @see _walk_bookmarks()

 *

 * @param string|array $args {

 *     Optional. String or array of arguments to list bookmarks.

 *

 *     @type string       $orderby          How to order the links by. Accepts post fields. Default 'name'.

 *     @type string       $order            Whether to order bookmarks in ascending or descending order.

 *                                          Accepts 'ASC' (ascending) or 'DESC' (descending). Default 'ASC'.

 *     @type int          $limit            Amount of bookmarks to display. Accepts 1+ or -1 for all.

 *                                          Default -1.

 *     @type string       $category         Comma-separated list of category IDs to include links from.

 *                                          Default empty.

 *     @type string       $category_name    Category to retrieve links for by name. Default empty.

 *     @type int|bool     $hide_invisible   Whether to show or hide links marked as 'invisible'. Accepts

 *                                          1|true or 0|false. Default 1|true.

 *     @type int|bool     $show_updated     Whether to display the time the bookmark was last updated.

 *                                          Accepts 1|true or 0|false. Default 0|false.

 *     @type int|bool     $echo             Whether to echo or return the formatted bookmarks. Accepts

 *                                          1|true (echo) or 0|false (return). Default 1|true.

 *     @type int|bool     $categorize       Whether to show links listed by category or in a single column.

 *                                          Accepts 1|true (by category) or 0|false (one column). Default 1|true.

 *     @type int|bool     $show_description Whether to show the bookmark descriptions. Accepts 1|true or 0|false.

 *                                          Default 0|false.

 *     @type string       $title_li         What to show before the links appear. Default 'Bookmarks'.

 *     @type string       $title_before     The HTML or text to prepend to the $title_li string. Default '<h2>'.

 *     @type string       $title_after      The HTML or text to append to the $title_li string. Default '</h2>'.

 *     @type string|array $class            The CSS class or an array of classes to use for the $title_li.

 *                                          Default 'linkcat'.

 *     @type string       $category_before  The HTML or text to prepend to $title_before if $categorize is true.

 *                                          String must contain '%id' and '%class' to inherit the category ID and

 *                                          the $class argument used for formatting in themes.

 *                                          Default '<li id="%id" class="%class">'.

 *     @type string       $category_after   The HTML or text to append to $title_after if $categorize is true.

 *                                          Default '</li>'.

 *     @type string       $category_orderby How to order the bookmark category based on term scheme if $categorize

 *                                          is true. Default 'name'.

 *     @type string       $category_order   Whether to order categories in ascending or descending order if

 *                                          $categorize is true. Accepts 'ASC' (ascending) or 'DESC' (descending).

 *                                          Default 'ASC'.

 * }

 * @return void|string Void if 'echo' argument is true, HTML list of bookmarks if 'echo' is false.

 */

function wp_list_bookmarks( $args = '' ) {

	$defaults = array(

		'orderby'          => 'name',

		'order'            => 'ASC',

		'limit'            => -1,

		'category'         => '',

		'exclude_category' => '',

		'category_name'    => '',

		'hide_invisible'   => 1,

		'show_updated'     => 0,

		'echo'             => 1,

		'categorize'       => 1,

		'title_li'         => __( 'Bookmarks' ),

		'title_before'     => '<h2>',

		'title_after'      => '</h2>',

		'category_orderby' => 'name',

		'category_order'   => 'ASC',

		'class'            => 'linkcat',

		'category_before'  => '<li id="%id" class="%class">',

		'category_after'   => '</li>',

	);

	$parsed_args = wp_parse_args( $args, $defaults );

	$output = '';

	if ( ! is_array( $parsed_args['class'] ) ) {

		$parsed_args['class'] = explode( ' ', $parsed_args['class'] );

	}

	$parsed_args['class'] = array_map( 'sanitize_html_class', $parsed_args['class'] );

	$parsed_args['class'] = trim( implode( ' ', $parsed_args['class'] ) );

	if ( $parsed_args['categorize'] ) {

		$cats = get_terms(

			array(

				'taxonomy'     => 'link_category',

				'name__like'   => $parsed_args['category_name'],

				'include'      => $parsed_args['category'],

				'exclude'      => $parsed_args['exclude_category'],

				'orderby'      => $parsed_args['category_orderby'],

				'order'        => $parsed_args['category_order'],

				'hierarchical' => 0,

			)

		);

		if ( empty( $cats ) ) {

			$parsed_args['categorize'] = false;

		}

	}

	if ( $parsed_args['categorize'] ) {

		// Split the bookmarks into ul's for each category.

		foreach ( (array) $cats as $cat ) {

			$params    = array_merge( $parsed_args, array( 'category' => $cat->term_id ) );

			$bookmarks = get_bookmarks( $params );

			if ( empty( $bookmarks ) ) {

				continue;

			}

			$output .= str_replace(

				array( '%id', '%class' ),

				array( "linkcat-$cat->term_id", $parsed_args['class'] ),

				$parsed_args['category_before']

			);

			/**

			 * Filters the category name.

			 *

			 * @since 2.2.0

			 *

			 * @param string $cat_name The category name.

			 */

			$catname = apply_filters( 'link_category', $cat->name );

			$output .= $parsed_args['title_before'];

			$output .= $catname;

			$output .= $parsed_args['title_after'];

			$output .= "\n\t<ul class='xoxo blogroll'>\n";

			$output .= _walk_bookmarks( $bookmarks, $parsed_args );

			$output .= "\n\t</ul>\n";

			$output .= $parsed_args['category_after'] . "\n";

		}

	} else {

		// Output one single list using title_li for the title.

		$bookmarks = get_bookmarks( $parsed_args );

		if ( ! empty( $bookmarks ) ) {

			if ( ! empty( $parsed_args['title_li'] ) ) {

				$output .= str_replace(

					array( '%id', '%class' ),

					array( 'linkcat-' . $parsed_args['category'], $parsed_args['class'] ),

					$parsed_args['category_before']

				);

				$output .= $parsed_args['title_before'];

				$output .= $parsed_args['title_li'];

				$output .= $parsed_args['title_after'];

				$output .= "\n\t<ul class='xoxo blogroll'>\n";

				$output .= _walk_bookmarks( $bookmarks, $parsed_args );

				$output .= "\n\t</ul>\n";

				$output .= $parsed_args['category_after'] . "\n";

			} else {

				$output .= _walk_bookmarks( $bookmarks, $parsed_args );

			}

		}

	}

	/**

	 * Filters the bookmarks list before it is echoed or returned.

	 *

	 * @since 2.5.0

	 *

	 * @param string $html The HTML list of bookmarks.

	 */

	$html = apply_filters( 'wp_list_bookmarks', $output );

	if ( $parsed_args['echo'] ) {

		echo $html;

	} else {

		return $html;

	}

}