<?php
/*
	WARNING! DO NOT EDIT THIS FILE!
	This file is part of the core Bizznis parent theme. 
	Please do all modifications in the form of a child theme.
*/

/**
 * Pull an attachment ID from a post, if one exists.
 *
 * @since 1.0.0
 */
function bizznis_get_image_id( $index = 0 ) {
	global $post;
	$image_ids = array_keys(
		get_children(
			array(
				'post_parent'    => $post->ID,
				'post_type'	     => 'attachment',
				'post_mime_type' => 'image',
				'orderby'        => 'menu_order',
				'order'	         => 'ASC',
			)
		)
	);
	if ( isset( $image_ids[$index] ) ) {
		return $image_ids[$index];
	}
	return false;
}

/**
 * Return an image pulled from the media gallery.
 *
 * @since 1.0.0
 */
function bizznis_get_image( $args = array() ) {
	global $post;
	$defaults = apply_filters( 'bizznis_get_image_default_args', array(
		'format'   => 'html',
		'size'     => 'full',
		'num'      => 0,
		'attr'     => '',
		'fallback' => 'first-attached',
		'context'  => '',
	) );
	$args = wp_parse_args( $args, $defaults );
	# Allow child theme to short-circuit this function
	$pre = apply_filters( 'bizznis_pre_get_image', false, $args, $post );
	if ( false !== $pre ) {
		return $pre;
	}
	# Check for post image (native WP)
	if ( has_post_thumbnail() && ( 0 === $args['num'] ) ) {
		$id = get_post_thumbnail_id();
		$html = wp_get_attachment_image( $id, $args['size'], false, $args['attr'] );
		list( $url ) = wp_get_attachment_image_src( $id, $args['size'], false, $args['attr'] );
	}
	# Else if first-attached, pull the first (default) image attachment
	elseif ( 'first-attached' == $args['fallback'] ) {
		$id = bizznis_get_image_id( $args['num'] );
		$html = wp_get_attachment_image( $id, $args['size'], false, $args['attr'] );
		list( $url ) = wp_get_attachment_image_src( $id, $args['size'], false, $args['attr'] );
	}
	# Else if fallback array exists
	elseif ( is_array( $args['fallback'] ) ) {
		$id   = 0;
		$html = $args['fallback']['html'];
		$url  = $args['fallback']['url'];
	}
	# Else, return false (no image)
	else {
		return false;
	}
	# Source path, relative to the root
	$src = str_replace( home_url(), '', $url );
	# Determine output
	if ( 'html' === strtolower( $args['format'] ) ) {
		$output = $html;
	}
	elseif ( 'url' === strtolower( $args['format'] ) ) {
		$output = $url;
	}
	else {
		$output = $src;
	}
	# Return false if $url is blank
	if ( empty( $url ) ) {
		$output = false;
	}
	# Return data, filtered
	return apply_filters( 'bizznis_get_image', $output, $args, $id, $html, $url, $src );
}

/**
 * Echo an image pulled from the media gallery.
 *
 * @since 1.0.0
 */
function bizznis_image( $args = array() ) {
	 /* Supported $args keys are:
		- format - string, default is 'html', may be 'url'
		- size   - string, default is 'full'
		- num    - integer, default is 0
		- attr   - string, default is ''
	*/
	$image = bizznis_get_image( $args );
	if ( $image ) {
		echo $image;
	}
	else {
		return false;
	}
}

/**
 * Return registered image sizes. Return two-dimensional, with width, height and crop sub-keys.
 *
 * @since 1.0.0
 */
function bizznis_get_additional_image_sizes() {
	global $_wp_additional_image_sizes;
	if ( $_wp_additional_image_sizes ) {
		return $_wp_additional_image_sizes;
	}
	return array();
}

/**
 * Return all registered image sizes arrays, including the standard sizes. Return two-dimensional, with width, height and crop sub-keys.
 *
 * @since 1.0.0
 */
function bizznis_get_image_sizes() {
	$builtin_sizes = array(
		'large'		=> array(
			'width'  => get_option( 'large_size_w' ),
			'height' => get_option( 'large_size_h' ),
		),
		'medium'	=> array(
			'width'  => get_option( 'medium_size_w' ),
			'height' => get_option( 'medium_size_h' ),
		),
		'thumbnail'	=> array(
			'width'  => get_option( 'thumbnail_size_w' ),
			'height' => get_option( 'thumbnail_size_h' ),
			'crop'   => get_option( 'thumbnail_crop' ),
		),
	);
	$additional_sizes = bizznis_get_additional_image_sizes();
	return array_merge( $builtin_sizes, $additional_sizes );
}