Context functions for RiverWoods theme

context-functions.php

<?php
/**
 * context-functions.php
 *
 * @package bc_starter
 */

/**
 * Get the primary category set in Yoast SEO
 *
 * @link https://gist.github.com/tarecord/4c7171b9955aee41d91db133af3e1d8f
 */
function bc_get_primary_cat( $post = 0, $taxonomy = 'category' ) {
  if ( !$post ) {
    $post = get_the_ID();
  }
  $terms = get_the_terms( $post, $taxonomy );
  $primary_term = array();

  if ( $terms ) {
    if ( class_exists( 'WPSEO_Primary_Term' ) ) {
      $wpseo_primary_term = new WPSEO_Primary_Term( $taxonomy, $post );
      $wpseo_primary_term = $wpseo_primary_term->get_primary_term();
      $term = get_term( $wpseo_primary_term );

      if ( is_wp_error( $term ) ) {
        $primary_term['name'] = $terms[0]->name;
        $primary_term['slug'] = $terms[0]->slug;
        $primary_term['link'] = get_term_link( $terms[0]->term_id );
      } else {
        $primary_term['name'] = $term->name;
        $primary_term['slug'] = $term->slug;
        $primary_term['link'] = get_term_link( $term->term_id );
      }
    } else {
      $primary_term['name'] = $terms[0]->name;
      $primary_term['slug'] = $terms[0]->slug;
      $primary_term['link'] = get_term_link( $terms[0]->term_id );
    }
  }
  return $primary_term;
}

/**
 * Get primary category name
 */
function bc_get_primary_cat_name( $post = 0, $taxonomy = 'category' ) {
  $cat = bc_get_primary_cat( $post, $taxonomy );
  $cat_name = $cat['name'];
  return $cat_name;
}

/**
 * Get primary category slug
 */
function bc_get_primary_cat_slug( $post = 0, $taxonomy = 'category' ) {
  $cat = bc_get_primary_cat( $post, $taxonomy );
  $cat_slug = $cat['slug'];
  return $cat_slug;
}

/**
 * Get primary category link
 */
function bc_get_primary_cat_link( $post = 0, $taxonomy = 'category' ) {
  $cat = bc_get_primary_cat( $post, $taxonomy );
  $cat_link = $cat['link'];
  return $cat_link;
}

/**
 * Get post category IDs
 */
function bc_get_post_cat_ids( $post_id = false ) {
  $cats = wp_get_post_categories( $post_id );
  return $cats;
}

/**
 * Get post category slugs
 */
function bc_get_post_cat_slugs( $post_id = false ) {
  $cat_slugs = array();
  $cat_ids = bc_get_post_cat_ids( $post_id );

  foreach ( $cat_ids as $id ) {
    $cat = get_category( $id );
    $cat_slug = $cat->slug;
    $cat_slugs[] = $cat_slug;
  }
  return $cat_slugs;
}

/**
 * Get community category from post
 */
function bc_get_community_cat( $post_id = false ) {
  $slugs = bc_get_post_cat_slugs( $post_id );
  $communities = array( 'exeter', 'manchester', 'durham' );
  $filtered = array_intersect( $communities, $slugs );
  return $filtered;
}


/**
 * Get page ancestor IDs
 */
function bc_get_ancestor_ids( $post_id ) {
  $ancestors = get_post_ancestors( $post_id );
  return $ancestors;
}

/**
 * Get top ancestor ID
 */
function bc_get_top_ancestor_id( $post_id ) {
  $top_ancestor = end( bc_get_ancestor_ids( $post_id ) );
  return $top_ancestor;
}

/**
 * Get top ancestor name
 */
function bc_get_top_ancestor_name( $post_id ) {
  $ancestor_id = bc_get_top_ancestor_id( $post_id );
  $ancestor_name = get_the_title( $ancestor_id );
  return $ancestor_name;
}

/**
 * What community are we in? (whether page or post)
 */
function bc_get_community_name( $post_id = false ) {
  $community = false;

  // are we on a page?
  if ( is_page() ) {
    $community = strtolower( bc_get_top_ancestor_name( $post_id ) );
  }
  // or are we on a post?
  elseif ( is_single() ) {
    $community_cat = bc_get_community_cat( $post_id );
    $community = implode( ' ', $community_cat );
  }
  return $community;
}