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<?php
/**
* Embed recipe 'cards' in post, with basic styling and print functionality
*
* To Do
* - defaults settings
* - basic styles/themecolor styles
* - validation/sanitization
* - print styles
*/
class Jetpack_Recipes {
private $scripts_and_style_included = false;
function __construct() {
add_action( 'init', array( $this, 'action_init' ) );
add_filter( 'wp_kses_allowed_html', array( $this, 'add_recipes_kses_rules' ), 10, 2 );
}
/**
* Add Schema-specific attributes to our allowed tags in wp_kses,
* so we can have better Schema.org compliance.
*
* @param array $allowedtags Array of allowed HTML tags in recipes.
* @param array $context Context to judge allowed tags by.
*/
function add_recipes_kses_rules( $allowedtags, $context ) {
if ( in_array( $context, array( '', 'post', 'data' ) ) ) :
// Create an array of all the tags we'd like to add the itemprop attribute to.
$tags = array( 'li', 'ol', 'ul', 'img', 'p', 'h3', 'time' );
foreach ( $tags as $tag ) {
$allowedtags = $this->add_kses_rule(
$allowedtags,
$tag,
array(
'class' => array(),
'itemprop' => array(),
'datetime' => array(),
)
);
}
// Allow itemscope and itemtype for divs.
$allowedtags = $this->add_kses_rule(
$allowedtags,
'div',
array(
'class' => array(),
'itemscope' => array(),
'itemtype' => array(),
)
);
endif;
return $allowedtags;
}
/**
* Function to add a new property rule to our kses array.
* Used by add_recipe_kses_rules() above.
*
* @param array $all_tags Array of allowed HTML tags in recipes.
* @param string $tag New HTML tag to add to the array of allowed HTML.
* @param array $rules Array of allowed attributes for that HTML tag.
*/
private function add_kses_rule( $all_tags, $tag, $rules ) {
// If the tag doesn't already exist, add it.
if ( ! isset( $all_tags[ $tag ] ) ) {
$all_tags[ $tag ] = array();
}
// Merge the new tags with existing tags.
$all_tags[ $tag ] = array_merge( $all_tags[ $tag ], $rules );
return $all_tags;
}
/**
* Register our shortcode and enqueue necessary files.
*/
function action_init() {
// Enqueue styles if [recipe] exists.
add_action( 'wp_head', array( $this, 'add_scripts' ), 1 );
// Render [recipe], along with other shortcodes that can be nested within.
add_shortcode( 'recipe', array( $this, 'recipe_shortcode' ) );
add_shortcode( 'recipe-notes', array( $this, 'recipe_notes_shortcode' ) );
add_shortcode( 'recipe-ingredients', array( $this, 'recipe_ingredients_shortcode' ) );
add_shortcode( 'recipe-directions', array( $this, 'recipe_directions_shortcode' ) );
}
/**
* Enqueue scripts and styles
*/
function add_scripts() {
if ( empty( $GLOBALS['posts'] ) || ! is_array( $GLOBALS['posts'] ) ) {
return;
}
foreach ( $GLOBALS['posts'] as $p ) {
if ( has_shortcode( $p->post_content, 'recipe' ) ) {
$this->scripts_and_style_included = true;
break;
}
}
if ( ! $this->scripts_and_style_included ) {
return;
}
wp_enqueue_style( 'jetpack-recipes-style', plugins_url( '/css/recipes.css', __FILE__ ), array(), '20130919' );
wp_style_add_data( 'jetpack-recipes-style', 'rtl', 'replace' );
// add $themecolors-defined styles.
wp_add_inline_style( 'jetpack-recipes-style', self::themecolor_styles() );
wp_enqueue_script( 'jetpack-recipes-printthis', plugins_url( '/js/recipes-printthis.js', __FILE__ ), array( 'jquery' ), '20170202' );
wp_enqueue_script( 'jetpack-recipes-js', plugins_url( '/js/recipes.js', __FILE__ ), array( 'jquery', 'jetpack-recipes-printthis' ), '20131230' );
$title_var = wp_title( '|', false, 'right' );
$rtl = is_rtl() ? '-rtl' : '';
$print_css_var = plugins_url( "/css/recipes-print{$rtl}.css", __FILE__ );
wp_localize_script(
'jetpack-recipes-js',
'jetpack_recipes_vars',
array(
'pageTitle' => $title_var,
'loadCSS' => $print_css_var,
)
);
}
/**
* Our [recipe] shortcode.
* Prints recipe data styled to look good on *any* theme.
*
* @param array $atts Array of shortcode attributes.
* @param string $content Post content.
*
* @return string HTML for recipe shortcode.
*/
static function recipe_shortcode( $atts, $content = '' ) {
$atts = shortcode_atts(
array(
'title' => '', // string.
'servings' => '', // intval.
'time' => '', // string.
'difficulty' => '', // string.
'print' => '', // string.
'source' => '', // string.
'sourceurl' => '', // string.
'image' => '', // string.
'description' => '', // string.
), $atts, 'recipe'
);
return self::recipe_shortcode_html( $atts, $content );
}
/**
* The recipe output
*
* @param array $atts Array of shortcode attributes.
* @param string $content Post content.
*
* @return string HTML output
*/
static function recipe_shortcode_html( $atts, $content = '' ) {
$html = '<div class="hrecipe jetpack-recipe" itemscope itemtype="https://schema.org/Recipe">';
// Print the recipe title if exists.
if ( '' !== $atts['title'] ) {
$html .= '<h3 class="jetpack-recipe-title" itemprop="name">' . esc_html( $atts['title'] ) . '</h3>';
}
// Print the recipe meta if exists.
if ( '' !== $atts['servings'] || '' != $atts['time'] || '' != $atts['difficulty'] || '' != $atts['print'] ) {
$html .= '<ul class="jetpack-recipe-meta">';
if ( '' !== $atts['servings'] ) {
$html .= sprintf(
'<li class="jetpack-recipe-servings" itemprop="recipeYield"><strong>%1$s: </strong>%2$s</li>',
esc_html_x( 'Servings', 'recipe', 'jetpack' ),
esc_html( $atts['servings'] )
);
}
if ( '' !== $atts['time'] ) {
// Get a time that's supported by Schema.org.
$duration = WPCOM_JSON_API_Date::format_duration( $atts['time'] );
// If no duration can be calculated, let's output what the user provided.
if ( empty( $duration ) ) {
$duration = $atts['time'];
}
$html .= sprintf(
'<li class="jetpack-recipe-time">
<time itemprop="totalTime" datetime="%3$s"><strong>%1$s: </strong>%2$s</time>
</li>',
esc_html_x( 'Time', 'recipe', 'jetpack' ),
esc_html( $atts['time'] ),
esc_attr( $duration )
);
}
if ( '' !== $atts['difficulty'] ) {
$html .= sprintf(
'<li class="jetpack-recipe-difficulty"><strong>%1$s: </strong>%2$s</li>',
esc_html_x( 'Difficulty', 'recipe', 'jetpack' ),
esc_html( $atts['difficulty'] )
);
}
if ( '' !== $atts['source'] ) {
$html .= sprintf(
'<li class="jetpack-recipe-source"><strong>%1$s: </strong>',
esc_html_x( 'Source', 'recipe', 'jetpack' )
);
if ( '' !== $atts['sourceurl'] ) :
// Show the link if we have one.
$html .= sprintf(
'<a href="%2$s">%1$s</a>',
esc_html( $atts['source'] ),
esc_url( $atts['sourceurl'] )
);
else :
// Skip the link.
$html .= sprintf(
'%1$s',
esc_html( $atts['source'] )
);
endif;
$html .= '</li>';
}
if ( 'false' !== $atts['print'] ) {
$html .= sprintf(
'<li class="jetpack-recipe-print"><a href="#">%1$s</a></li>',
esc_html_x( 'Print', 'recipe', 'jetpack' )
);
}
$html .= '</ul>';
} // End if().
// Output the image, if we have one.
if ( '' !== $atts['image'] ) {
$html .= sprintf(
'<img class="jetpack-recipe-image" itemprop="image" src="%1$s" />',
esc_url( $atts['image'] )
);
}
// Output the description, if we have one.
if ( '' !== $atts['description'] ) {
$html .= sprintf(
'<p class="jetpack-recipe-description" itemprop="description">%1$s</p>',
esc_html( $atts['description'] )
);
}
// Print content between codes.
$html .= '<div class="jetpack-recipe-content">' . do_shortcode( $content ) . '</div>';
// Close it up.
$html .= '</div>';
// If there is a recipe within a recipe, remove the shortcode.
if ( has_shortcode( $html, 'recipe' ) ) {
remove_shortcode( 'recipe' );
}
// Sanitize html.
$html = wp_kses_post( $html );
// Return the HTML block.
return $html;
}
/**
* Our [recipe-notes] shortcode.
* Outputs ingredients, styled in a div.
*
* @param array $atts Array of shortcode attributes.
* @param string $content Post content.
*
* @return string HTML for recipe notes shortcode.
*/
static function recipe_notes_shortcode( $atts, $content = '' ) {
$atts = shortcode_atts( array(
'title' => '', // string.
), $atts, 'recipe-notes' );
$html = '';
// Print a title if one exists.
if ( '' !== $atts['title'] ) {
$html .= '<h4 class="jetpack-recipe-notes-title">' . esc_html( $atts['title'] ) . '</h4>';
}
$html .= '<div class="jetpack-recipe-notes">';
// Format content using list functionality, if desired.
$html .= self::output_list_content( $content, 'notes' );
$html .= '</div>';
// Sanitize html.
$html = wp_kses_post( $html );
// Return the HTML block.
return $html;
}
/**
* Our [recipe-ingredients] shortcode.
* Outputs notes, styled in a div.
*
* @param array $atts Array of shortcode attributes.
* @param string $content Post content.
*
* @return string HTML for recipe ingredients shortcode.
*/
static function recipe_ingredients_shortcode( $atts, $content = '' ) {
$atts = shortcode_atts( array(
'title' => esc_html_x( 'Ingredients', 'recipe', 'jetpack' ), // string.
), $atts, 'recipe-ingredients' );
$html = '<div class="jetpack-recipe-ingredients">';
// Print a title unless the user has opted to exclude it.
if ( 'false' !== $atts['title'] ) {
$html .= '<h4 class="jetpack-recipe-ingredients-title">' . esc_html( $atts['title'] ) . '</h4>';
}
// Format content using list functionality.
$html .= self::output_list_content( $content, 'ingredients' );
$html .= '</div>';
// Sanitize html.
$html = wp_kses_post( $html );
// Return the HTML block.
return $html;
}
/**
* Reusable function to check for shortened formatting.
* Basically, users can create lists with the following shorthand:
* - item one
* - item two
* - item three
* And we'll magically convert it to a list. This has the added benefit
* of including itemprops for the recipe schema.
*
* @param string $content HTML content.
* @param string $type Type of list.
*
* @return string content formatted as a list item
*/
static function output_list_content( $content, $type ) {
$html = '';
switch ( $type ) {
case 'directions' :
$list_item_replacement = '<li class="jetpack-recipe-directions">${1}</li>';
$itemprop = ' itemprop="recipeInstructions"';
$listtype = 'ol';
break;
case 'ingredients' :
$list_item_replacement = '<li class="jetpack-recipe-ingredient" itemprop="recipeIngredient">${1}</li>';
$itemprop = '';
$listtype = 'ul';
break;
default:
$list_item_replacement = '<li class="jetpack-recipe-notes">${1}</li>';
$itemprop = '';
$listtype = 'ul';
}
// Check to see if the user is trying to use shortened formatting.
if (
strpos( $content, '–' ) !== false ||
strpos( $content, '—' ) !== false ||
strpos( $content, '-' ) !== false ||
strpos( $content, '*' ) !== false ||
strpos( $content, '#' ) !== false ||
strpos( $content, '–' ) !== false || // ndash.
strpos( $content, '—' ) !== false || // mdash.
preg_match( '/\d+\.\s/', $content )
) {
// Remove breaks and extra whitespace.
$content = str_replace( "<br />\n", "\n", $content );
$content = trim( $content );
$ul_pattern = '/(?:^|\n|\<p\>)+(?:[\-–—]+|\–|\—|\*)+\h+(.*)/mi';
$ol_pattern = '/(?:^|\n|\<p\>)+(?:\d+\.|#+)+\h+(.*)/mi';
preg_match_all( $ul_pattern, $content, $ul_matches );
preg_match_all( $ol_pattern, $content, $ol_matches );
if ( 0 !== count( $ul_matches[0] ) || 0 !== count( $ol_matches[0] ) ) {
if ( 0 !== count( $ol_matches[0] ) ) {
$listtype = 'ol';
$list_item_pattern = $ol_pattern;
} else {
$listtype = 'ul';
$list_item_pattern = $ul_pattern;
}
$html .= '<' . $listtype . $itemprop . '>';
$html .= preg_replace( $list_item_pattern, $list_item_replacement, $content );
$html .= '</' . $listtype . '>';
// Strip out any empty <p> tags and stray </p> tags, because those are just silly.
$empty_p_pattern = '/(<p>)*\s*<\/p>/mi';
$html = preg_replace( $empty_p_pattern, '', $html );
} else {
$html .= do_shortcode( $content );
}
} else {
$html .= do_shortcode( $content );
}
// Return our formatted content.
return $html;
}
/**
* Our [recipe-directions] shortcode.
* Outputs directions, styled in a div.
*
* @param array $atts Array of shortcode attributes.
* @param string $content Post content.
*
* @return string HTML for recipe directions shortcode.
*/
static function recipe_directions_shortcode( $atts, $content = '' ) {
$atts = shortcode_atts( array(
'title' => esc_html_x( 'Directions', 'recipe', 'jetpack' ), // string.
), $atts, 'recipe-directions' );
$html = '<div class="jetpack-recipe-directions">';
// Print a title unless the user has specified to exclude it.
if ( 'false' !== $atts['title'] ) {
$html .= '<h4 class="jetpack-recipe-directions-title">' . esc_html( $atts['title'] ) . '</h4>';
}
// Format content using list functionality.
$html .= self::output_list_content( $content, 'directions' );
$html .= '</div>';
// Sanitize html.
$html = wp_kses_post( $html );
// Return the HTML block.
return $html;
}
/**
* Use $themecolors array to style the Recipes shortcode
*
* @print style block
* @return string $style
*/
function themecolor_styles() {
global $themecolors;
$style = '';
if ( isset( $themecolors ) ) {
$style .= '.jetpack-recipe { border-color: #' . esc_attr( $themecolors['border'] ) . '; }';
$style .= '.jetpack-recipe-title { border-bottom-color: #' . esc_attr( $themecolors['link'] ) . '; }';
}
return $style;
}
}
new Jetpack_Recipes();