Wordpress shortcode: Render all posts by a certain user

readme.md

shortcode

[wsrn_autorPosts user="11"]

Note: user must contain a valid userid

Note:

html is rendered by a small function that replaces a placeholder inside swirly brackets with a value from an array.

Values

$props = array(
  'title' => "Brave new world"
);

Template

$tpl = "<h1>{{title}}</h1>";

Function call

$html = renderHTML($tpl, $props);

Result

<h1>Brave new world</h1>

todos.md

to-dos:

• add sanity check for the userid
• finish debugging placeholders
• add pagination (limit, offset, logic)

nice-to-haves

• steal output filters from modx

wsrn_autorPosts.shortcode.php

<?php

function renderHTML($tpl, $props){
	$chunk = $tpl;
	foreach($props as $key => $value){
		$chunk = str_replace("{{".$key."}}",$value, $chunk);
	}
	return $chunk;
}

function wsrn_autorPosts(){

	/*
	[wsrn_autorPosts user="11"]
	*/
	
	$time_start = microtime(true); 
	
	$defaults = array(
		 'user' => 11
		,'debug' => false
	);
	
	$props = shortcode_atts($defaults, $atts);
	//$props['debug'] = true;

	$msg = array(
		'shortcode' => array(
			'name' => 'wsrn_autorenHeader'
			,'execution_time' => ''
			,'props' => $props
		)
		,'response' => array()
	);	
	
	$user = $props['user'];
	
	$debug = $props['debug'];	
	
		$args = array(
		  'author'        =>  $user, 
		  'orderby'       =>  'post_date',
		  'order'         =>  'ASC',
		  'posts_per_page' => -1 // no limit
		);

		$posts = get_posts( $args );
		$total = count($posts);
		
		// Vorlagen definieren. 
		//Alles was ersetzt werden soll in doppelten Klammern markieren. 
		//Bsp. {{title}} oder {{date}}
	
		$output = '';
	
		foreach($posts as $post){
			$postArr = json_decode(json_encode($post),true);
			
			unset($postArr['post_content']);

			$postId = $postArr['ID'];

			/*
			 * render categories
			 **/
			
			$tplCategory = '
			<li class="meta-categories" data-type="simple" data-idx="{{i}}">
				<a href="{{url}}" rel="tag" alt="{{alt}}" class="ct-term-{{id}}">
					{{text}}
				</a>
			</li>
			';			
	
			$categories = get_the_category($postId);
			$catlist = '';

			if ( ! empty( $categories ) ) {
				$i = 0;
				
				$categorynames = array();
				
				foreach( $categories as $category ) {
					$i++;
					
					$categorynames[] = $category->slug;
					
					$data = array(
						 'i' => $i
						,'id' => $category->term_id
						,'url' => esc_url( get_category_link( $category->term_id ) )
						,'alt' => esc_attr( sprintf( __( 'View all posts in %s', 'textdomain' ), $category->name ) )
						,'text' => esc_html( $category->name )
					);
					
					$catlist .= renderHTML($tplCategory, $data);
				}
			}			
			
			/*
			 * Render articles
			 * tpl: $tplArticle
			 **/
			
			$tplArticle = '
				<article 
					id="post-{{id}}" 
					class="post-{{id}} entry-card post type-post status-publish format-standard has-post-thumbnail hentry {{categorynames}}">
						<a  class="ct-image-container boundless-image" 
							href="{{permalink}}" 
							aria-label="{{title}}" 
							tabindex="-1"
						>
							{{thumbnail}}
						</a>
						<ul class="entry-meta" data-type="simple:slash">
							{{categories}}
						</ul>
						<h2 class="entry-title">
							<a href="{{permalink}}" rel="bookmark">{{title}}</a>
						</h2>
						<ul class="entry-meta" data-type="simple:slash">
							<li class="meta-date" itemprop="datePublished">
								<time class="ct-meta-element-date" datetime="{datetime}">{{date}}</time>
							</li>
						</ul>
						<div class="entry-excerpt">{{excerpt}}</div>
						<a 
							class="entry-button" data-type="simple" 
							href="{{permalink}}"
						>
							Weiterlesen
							<span class="screen-reader-text">
								{{title}}
							</span>
						</a>
				</article>
				';				
			
			$data = array(
				 'id' 		 => $postArr['ID']
				,'title' 	 => $postArr['post_title']
				,'date' 	 => date('d.m.Y',strtotime($postArr['post_date']))
				,'datetime'  => date('c',strtotime($postArr['post_date']))
				,'excerpt' 	 => $postArr['post_excerpt']
				,'permalink' => get_permalink($postId)
				,'thumbnail' => get_the_post_thumbnail($postId, '400x300' ,array('class' => 'img-fluid'))
				,'categories' => $catlist
				,'categorynames' => implode(' ' , $categorynames)
			);
			
			$output .= renderHTML($tplArticle, $data);
			
		}
	
		/*
		 * Render $tplWrapper
		 */
	
		$tplWrapper = '
		<div data-prefix="categories">
			<h3>Beiträge ({{total}})</h3>
			<div class="entries" data-archive="default" data-layout="grid" data-cards="boxed">
				{{output}}
			</div>
		</div>
		';	
	
		$data = array(
			 'output' => $output
			,'total' => $total
		);
	
		$output = renderHTML($tplWrapper, $data);

	$time_end = microtime(true);
	$execution_time = ($time_end - $time_start);
	
	$msg['shortcode']['execution_time'] = $execution_time;	
	
return $output;
	
}

add_shortcode('wsrn_autorPosts', 'wsrn_autorPosts');