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<?php
/*
Copyright 2007-2024 John Havlik (email : john.havlik@mtekk.us)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
require_once(dirname(__FILE__) . '/includes/block_direct_access.php');
//The breadcrumb class
class bcn_breadcrumb
{
//Our member variables
const version = '7.3.0';
//The main text that will be shown
protected $title;
//The breadcrumb's template, used durring assembly
protected $template;
//The breadcrumb's no anchor template, used durring assembly when there won't be an anchor
protected $template_no_anchor;
//Boolean, is this element linked
protected $linked = false;
//The link the breadcrumb leads to, null if $linked == false
protected $url;
//The corresponding resource ID
protected $id = null;
private $_title = null;
//The type of this breadcrumb
protected $type;
const default_template_no_anchor = '<span property="itemListElement" typeof="ListItem"><span property="name" class="%type%">%htitle%</span><meta property="url" content="%link%"><meta property="position" content="%position%"></span>';
/**
* The enhanced default constructor, ends up setting all parameters via the set_ functions
*
* @param string $title (optional) The title of the breadcrumb
* @param string $template (optional) The html template for the breadcrumb
* @param string $type (optional) The breadcrumb type
* @param string $url (optional) The url the breadcrumb links to
* @param bool $linked (optional) Whether or not the breadcrumb uses the linked or unlinked template
*/
public function __construct($title = '', $template = '', array $type = array(), $url = '', $id = null, $linked = false)
{
//The breadcrumb type
$this->type = $type;
//Set the resource id
$this->set_id($id);
//Set the title
$this->set_title($title);
//Set the default anchorless templates value
$this->template_no_anchor = bcn_breadcrumb::default_template_no_anchor;
//If we didn't get a good template, use a default template
if($template == null)
{
$this->set_template(bcn_breadcrumb::get_default_template());
}
//If something was passed in template wise, update the appropriate internal template
else
{
if($linked)
{
$this->set_template($template);
}
else
{
$this->template_no_anchor = $this->run_template_kses(apply_filters('bcn_breadcrumb_template_no_anchor', $template, $this->type, $this->id));
$this->set_template(bcn_breadcrumb::get_default_template());
}
}
$this->set_url($url);
$this->set_linked($linked);
}
/**
* Function to return the translated default template
*
* @return string The default breadcrumb template
*/
static public function get_default_template()
{
return sprintf('<span property="itemListElement" typeof="ListItem"><a property="item" typeof="WebPage" title="%1$s" href="%%link%%" class="%%type%%" bcn-aria-current><span property="name">%%htitle%%</span></a><meta property="position" content="%%position%%"></span>', esc_attr__('Go to %title%.','breadcrumb-navxt'));
}
/**
* Function to set the protected title member
*
* @param string $title The title of the breadcrumb
*/
public function set_title($title)
{
//Set the title
$this->title = apply_filters('bcn_breadcrumb_title', $title, $this->type, $this->id);
$this->_title = $this->title;
}
/**
* Function to get the protected title member
*
* @return $this->title
*/
public function get_title()
{
//Return the title
return $this->title;
}
/**
* Function to set the internal URL variable
*
* @param string $url the URL to link to
*/
public function set_url($url)
{
$url = trim($url);
$this->url = apply_filters('bcn_breadcrumb_url', $url, $this->type, $this->id);
}
/**
* Function to get the internal URL variable
*
* @return string the URL that the breadcrumb links to
*/
public function get_url()
{
return $this->url;
}
/**
* Function to set the internal breadcrumb linked status
*
* @param bool $linked whether or not the breadcrumb uses the linked or unlinked template
*/
public function set_linked($linked)
{
$this->linked = apply_filters('bcn_breadcrumb_linked', $linked, $this->type, $this->id);
}
/**
* Function to check if this breadcrumb will be linked
*
* @return boolean whether or not this breadcrumb is linked
*/
public function is_linked()
{
return $this->linked;
}
/**
* A wrapper for wp_kses which handles getting the allowed html
*
* @param string $template_str The tempalte string to run through kses
* @return string The template string post cleaning
*/
protected function run_template_kses($template_str)
{
return wp_kses($template_str, apply_filters('bcn_allowed_html', wp_kses_allowed_html('post')));
}
/**
* Function to set the internal breadcrumb template
*
* @param string $template the template to use durring assebly
*/
public function set_template($template)
{
//Assign the breadcrumb template
$this->template = $this->run_template_kses(apply_filters('bcn_breadcrumb_template', $template, $this->type, $this->id));
}
/**
* Function to set the internal breadcrumb ID
*
* @param int $id the id of the resource this breadcrumb represents
*/
public function set_id($id)
{
$this->id = $id;
}
/**
* Function to get the internal breadcrumb ID
*
* @return int the id of the resource this breadcrumb represents
*/
public function get_id()
{
return $this->id;
}
/**
* Append a type entry to the type array
*
* @param string $type the type to append
*/
public function add_type($type)
{
$this->type[] = $type;
}
/**
* Return the type array
*
* @return array The type array
*/
public function get_types()
{
return $this->type;
}
/**
* This function will intelligently trim the title to the value passed in through $max_length. This function is deprecated, do not call.
*
* @param int $max_length of the title.
* @deprecated since 5.2.0
*/
public function title_trim($max_length)
{
_deprecated_function(__FUNCTION__, '5.2.0');
//To preserve HTML entities, must decode before splitting
$this->title = html_entity_decode($this->title, ENT_COMPAT, 'UTF-8');
$title_length = mb_strlen($this->title);
//Make sure that we are not making it longer with that ellipse
if($title_length > $max_length && ($title_length + 2) > $max_length)
{
//Trim the title
$this->title = mb_substr($this->title, 0, $max_length - 1);
//Make sure we can split, but we want to limmit to cutting at max an additional 25%
if(mb_strpos($this->title, ' ', .75 * $max_length) > 0)
{
//Don't split mid word
while(mb_substr($this->title,-1) != ' ')
{
$this->title = mb_substr($this->title, 0, -1);
}
}
//Remove the whitespace at the end and add the hellip
$this->title = rtrim($this->title) . html_entity_decode('…', ENT_COMPAT, 'UTF-8');
}
//Return to the encoded version of all HTML entities (keep standards complance)
$this->title = force_balance_tags(htmlentities($this->title, ENT_COMPAT, 'UTF-8'));
}
/**
* Assembles the parts of the breadcrumb into a html string
*
* @param bool $linked Allow the output to contain anchors?
* @param int $position The position of the breadcrumb in the trail (between 1 and n when there are n breadcrumbs in the trail)
* @param bool $is_current_item Whether or not this breadcrumb represents the current item
*
* @return string The compiled breadcrumb string
*/
public function assemble($linked, $position, $is_current_item = false)
{
if($is_current_item)
{
$aria_current_str = 'aria-current="page"';
}
else
{
$aria_current_str = '';
}
//Build our replacements array
$replacements = array(
'%title%' => esc_attr(strip_tags($this->title)),
'%link%' => esc_url($this->url),
'%htitle%' => $this->title,
'%type%' => apply_filters('bcn_breadcrumb_types', $this->type, $this->id),
'%ftitle%' => esc_attr(strip_tags($this->_title)),
'%fhtitle%' => $this->_title,
'%position%' => $position,
'bcn-aria-current' => $aria_current_str
);
//The type may be an array, implode it if that is the case
if(is_array($replacements['%type%']))
{
array_walk($replacements['%type%'], 'sanitize_html_class');
$replacements['%type%'] = esc_attr(implode(' ', $replacements['%type%']));
}
else
{
_doing_it_wrong(__CLASS__ . '::' . __FUNCTION__, __('bcn_breadcrumb::type must be an array', 'breadcrumb-navxt'), '6.0.2');
}
$replacements = apply_filters('bcn_template_tags', $replacements, $this->type, $this->id);
//If we are linked we'll need to use the normal template
if($this->linked && $linked)
{
//Return the assembled breadcrumb string
return str_replace(array_keys($replacements), $replacements, $this->template);
}
//Otherwise we use the no anchor template
else
{
//Return the assembled breadcrumb string
return str_replace(array_keys($replacements), $replacements, $this->template_no_anchor);
}
}
/**
* Assembles the parts of the breadcrumb into a JSON-LD ready object-array
*
* @param int $position The position of the breadcrumb in the trail (between 1 and n when there are n breadcrumbs in the trail)
*
* @return array(object) The prepared array object ready to pass into json_encode
*/
public function assemble_json_ld($position)
{
return (object) apply_filters('bcn_breadcrumb_assembled_json_ld_array', array(
'@type' => 'ListItem',
'position' => $position,
'item' => (object)array(
'@id' => esc_url($this->url),
'name' => esc_attr($this->title))
), $this->type, $this->id);
}
}