Make a Customizr' slider show recent posts

recent_posts_slider_for_customizr.php

/* Works with Customizr > 3.3.26 and Customizr-Pro > 1.1.9 */
add_filter('tc_core', 'use_custom_slider_class');
function use_custom_slider_class($classes){
  //don't instantiate default class
  unset( $classes['content'][
      array_search(array('inc/parts','slider'), $classes['content'])
    ]
  );
  //instantiate our class
  new TC_Slider_mod;
  return $classes;
}
add_filter('tc_slider_name_id', 'my_slider_of_posts');
function my_slider_of_posts( $slider_name_id ){
  if ( $slider_name_id == 'front-slider' )
    return array(
        'slider'     => 'front-slider',
        'query'      => array(
                      'tag'            => "front-slider",
                      'posts_per_page' => 5,
                      'order'          => 'desc'
                  ),
    );
  return $slider_name_id;
}
 
if ( ! defined('CUSTOMIZR') )
  define('CUSTOMIZR', get_template_directory() );
 
require_once( CUSTOMIZR . '/inc/parts/class-content-slider.php');
class TC_Slider_mod extends TC_slider{
  private $saved_slides;
  private $slider_name_id = false;
  private $layout_value;
  private $img_size;
  private $layout_class;
 
  //override tc_set_slider_hooks()
  function tc_set_slider_hooks() {
    //gets the actual page id if we are displaying the posts page
    $queried_id = $this -> tc_get_real_id();
 
    $slider_name_id = apply_filters('tc_slider_name_id', $this ->tc_get_current_slider($queried_id) );
 
    if ( ! is_array( $slider_name_id ) )
      return parent::tc_set_slider_hooks();
 
    extract($slider_name_id);
    $all_sliders = TC_utils::$inst -> tc_opt( 'tc_sliders');
    $saved_slides = ( isset($all_sliders[$slider]) ) ? $all_sliders[$slider] : false;
 
    //if the slider not longer exists or exists but is empty, return false
    if ( !isset($saved_slides) || ! is_array($saved_slides) || empty($saved_slides) )
        return;
 
    
    add_action( '__after_header' , array( $this , 'tc_slider_display' ) );
    add_action( '__after_carousel_inner' , array( $this , 'tc_slider_control_view' ) );
    //adds the center-slides-enabled css class
    add_filter( 'tc_carousel_inner_classes', array( $this, 'tc_set_inner_class') );
    
    $this -> tc_slider_mod_set_properties( $saved_slides, $slider_name_id, $queried_id );
  }
 
  private function tc_get_current_slider($queried_id) {
   //gets the current slider id
   $_home_slider = TC_utils::$inst->tc_opt( 'tc_front_slider' );
   $slider_name_id = ( tc__f('__is_home') && $_home_slider ) ? $_home_slider : esc_attr( get_post_meta( $queried_id, $key = 'post_slider_key' , $single = true ) );
   return apply_filters( 'tc_slider_name_id', $slider_name_id , $queried_id);
  }
 
  private function tc_get_real_id() {
 
    global $wp_query;
    $queried_id = get_queried_object_id();
    return ( ! tc__f('__is_home') && $wp_query -> is_posts_page && ! empty($queried_id) ) ? $queried_id : get_the_ID();
 
  }
 
  function tc_slider_mod_set_properties( $saved_slides, $slider_name_id, $queried_id ){
 
    $this -> saved_slides   = $saved_slides;
    $this -> slider_name_id = $slider_name_id;
    //gets slider options if any
    $layout_value = tc__f('__is_home') ? TC_utils::$inst->tc_opt( 'tc_slider_width' ) : esc_attr(get_post_meta( $queried_id, $key = 'slider_layout_key' , $single = true ));
 
    $this -> layout_value = apply_filters( 'tc_slider_layout', $layout_value, $queried_id );
 
    //declares the layout vars
    $this -> layout_class = implode( " " , apply_filters( 'tc_slider_layout_class' , ( 0 == $layout_value ) ? array('container', 'carousel', 'customizr-slide') : array('carousel', 'customizr-slide') ) );
 
    $this -> img_size = apply_filters( 'tc_slider_img_size' , ( 0 == $layout_value ) ? 'slider' : 'slider-full');
 
  }
 
  //override tc_slider_display
  function tc_slider_display() {
    if ( ! $this -> slider_name_id )
      return parent::tc_slider_display();
    
    $slider_name_id = $this -> slider_name_id;
    $img_size       = $this -> img_size;
    $saved_slides   = $this -> saved_slides;
    $layout_class   = $this -> layout_class;
 
    $slides = $this -> tc_get_posts_slides( $slider_name_id, $img_size, $saved_slides );
    //returns nothing if no slides to display
    if ( ! isset($slides) || ! $slides )
      return;
 
    extract($slides);
    //define carousel inner classes
    $_inner_classes = implode( ' ' , apply_filters( 'tc_carousel_inner_classes' , array( 'carousel-inner' ) ) );
    ob_start();
    ?>
      <div id="customizr-slider" class="<?php echo $layout_class ?> ">
        <?php if ( 1 == esc_attr( TC_utils::$inst->tc_opt( 'tc_display_slide_loader') ) && apply_filters( 'tc_display_slider_loader' , true ) ): ?>
          <div class="tc-slider-loader-wrapper">
            <div class="tc-img-gif-loader">
              <img data-no-retina src="<?php echo apply_filters('tc_slider_loader_src' , sprintf( '%1$s/%2$s' , TC_BASE_URL , 'inc/assets/img/slider-loader.gif') ) ?>">
            </div>
          </div>
        <?php endif; ?>
        <?php do_action( '__before_carousel_inner' , $slides ) ?>
          <div class="<?php echo $_inner_classes?>">
            <?php
              foreach ($slides as $id => $data){
                $_view_model = compact( "id", "data" , "slider_name_id", "img_size" );
                $this -> tc_render_single_slide_view( $_view_model );
              }
            ?>
         </div><!-- /.carousel-inner -->
         <?php do_action( '__after_carousel_inner' , $slides ) ?>
      </div><!-- /#customizr-slider -->
    <?php
    $html = ob_get_contents();
    if ($html) ob_end_clean();
    echo apply_filters( 'tc_slider_display', $html, $slider_name_id );
  }
 
  function tc_get_posts_slides( $slider_name_id, $img_size, $saved_slides){
    extract($slider_name_id);
    global $wp_query, $wp_the_query, $post;
    $wp_query = new WP_Query($query);
        
    // if you don't want to show the first attachment when featured image isn't set
    // remove the line below
    add_filter('tc_show_single_post_content', '__return_false');
 
    // remove smart load if any
    $smart_load_enabled = method_exists('TC_utils', 'tc_parse_imgs') && method_exists('TC_utils', 'tc_opt') && esc_attr( TC_utils::$inst->tc_opt( 'tc_img_smart_load' ) );
    if ( $smart_load_enabled )
        remove_filter('tc_thumb_html', array(TC_utils::$instance, 'tc_parse_imgs'));
 
    // build our array of slides
 
    //initialize the slides array
    $slides   = array();
    //init slide active state index
    $__loop_index        = 0;
    while ( have_posts() ){
      the_post();
            
      //title
      $title                  = $post->post_title;
      $default_title_length   = apply_filters( 'tc_slide_title_length', 80 );
      $title                  = ( strlen($title) > $default_title_length ) ? substr( $title,0,strpos( $title, ' ' , $default_title_length) ). ' ...' : $title;
      //lead text
      $text                   = $this -> tc_get_post_slides_excerpt( $post->post_excerpt, apply_filters('tc_slide_text_length', 250), '...');
 
      //button text
      $button_text            = __('Read more &raquo;', 'customizr');
      $default_button_length  = apply_filters( 'tc_slide_button_length', 80 );
      $button_text            = ( strlen($button_text) > $default_button_length ) ? substr( $button_text,0,strpos( $button_text, ' ' ,$default_button_length)). ' ...' : $button_text;
 
      //link post id
      $link_id                = get_the_id();
        
      $id                     = $link_id;
      //button link
      $link_url               = $link_id ? get_permalink( $link_id ) : 'javascript:void(0)';
 
      //sets the first slide active
      $active                 = ( 0 == $__loop_index ) ? 'active' : '';
 
      $color_style            = '';
 
      //attachment image
      $alt                    = apply_filters( 'tc_slide_background_alt' , trim(strip_tags( get_the_title() ) ) );
      $slide_background       = $this -> tc_get_thumbnail_data($img_size, $alt);
        //adds all values to the slide array only if the content exists (=> handle the case when an attachment has been deleted for example). Otherwise apply a default slide
      if ( empty($slide_background) && isset($saved_slides[1]) )
        $slide_background   = wp_get_attachment_image( $saved_slides[1], $img_size, false, array( 'class' => 'slide' , 'alt' => $alt ) );
 
      $slides[$id]            = array(
                                'title'               =>  $title,
                                'text'                =>  $text,
                                'button_text'         =>  $button_text,
                                'link_id'             =>  $link_id,
                                'link_url'            =>  $link_url,
                                'active'              =>  $active,
                                'color_style'         =>  $color_style,
                                'slide_background'    =>  $slide_background,
      );
 
      //increments active index
      $__loop_index++;
    }//end of slides loop
    
    $slides = apply_filters('tc_post_slides', ( !empty($slides) ) ? $slides : false, $img_size);
    // if you chose to not show the first attachment when featured image isn't set
    // remove the line below
    remove_filter('tc_show_single_post_content', '__return_false');
 
    // re-add smart load if removed
    if ( $smart_load_enabled )
      add_filter('tc_thumb_html', array(TC_utils::$instance, 'tc_parse_imgs'));
 
    $wp_query = $wp_the_query;
    
    //returns the slides or false if nothing
    return $slides;
  }// end pf tc_get_the_slides

  function tc_get_thumbnail_data($img_size, $alt){
    $attachment_id = get_post_meta( get_the_ID(), 'slide_img');
    if ( $attachment_id )
      return wp_get_attachment_image( $attachment_id[0], $img_size, false, array('class' => 'slide' , 'alt' => $alt) );
    $thumb = TC_post_thumbnails::$instance -> tc_get_thumbnail_model($img_size);
    $thumb = isset($thumb) && isset($thumb['tc_thumb']) ? $thumb['tc_thumb'] : null;
    return $thumb;
  }

  function tc_get_post_slides_excerpt( $excerpt, $default_text_length, $more ){
    if ( '' == $excerpt ) {
      $excerpt = get_the_content('');      
      $excerpt = strip_shortcodes( $excerpt );
      $excerpt = apply_filters( 'the_content', $excerpt );
      $excerpt = str_replace(']]>', ']]&gt;', $excerpt );
    }
    
    $excerpt = trim(strip_tags($excerpt));
    $end_substr = $excerpt_length = strlen( $excerpt );
    if ( $excerpt_length > $default_text_length ){
      $end_substr = strpos( $excerpt, ' ' , $default_text_length);
      $end_substr = ( $end_substr !== FALSE ) ? $end_substr : $default_text_length;
      $excerpt = substr( $excerpt , 0 , $end_substr );
    }
    return ( $end_substr == $excerpt_length ) ? $excerpt : $excerpt . ' '.$more;
  }
}