Simple Download Monitor Shortcodes

function sdm_create_download_shortcode( $atts ) {

	$shortcode_atts = sanitize_sdm_create_download_shortcode_atts(
		shortcode_atts(
			array(
				'id'           => '',
				'fancy'        => '0',
				'button_text'  => sdm_get_default_download_button_text( $atts['id'] ),
				'new_window'   => '',
				'color'        => '',
				'css_class'    => '',
				'show_size'    => '',
				'show_version' => '',
			),
			$atts
		)
	);

	// Make shortcode attributes available in function local scope.
	extract( $shortcode_atts );

	if ( empty( $id ) ) {
		return '<p style="color: red;">' . __( 'Error! Please enter an ID value with this shortcode.', 'simple-download-monitor' ) . '</p>';
	}

		$id        = intval( $id );
		$color     = sdm_sanitize_text( $color );
		$css_class = sdm_sanitize_text( $css_class );

	// Check to see if the download link cpt is password protected
	$get_cpt_object  = get_post( $id );
	$cpt_is_password = ! empty( $get_cpt_object->post_password ) ? 'yes' : 'no';  // yes = download is password protected;
	// Get CPT title
	$item_title = get_the_title( $id );

	//*** Generate the download now button code ***
	if ( empty( $new_window ) ) {
		$new_window = get_post_meta( $id, 'sdm_item_new_window', true );
	}
	$window_target = empty( $new_window ) ? '_self' : '_blank';

	$homepage             = get_bloginfo( 'url' );
	$download_url         = $homepage . '/?sdm_process_download=1&download_id=' . $id;
	$download_button_code = '<a href="' . $download_url . '" class="sdm_download ' . esc_attr($color) . '" title="' . esc_html($item_title) . '" target="' . $window_target . '">' . esc_attr($button_text) . '</a>';

	$main_advanced_opts = get_option( 'sdm_advanced_options' );

	//Check if Terms & Condition enabled
	$termscond_enable = isset( $main_advanced_opts['termscond_enable'] ) ? true : false;
	if ( $termscond_enable ) {
		$download_button_code = sdm_get_download_form_with_termsncond( $id, $shortcode_atts, 'sdm_download ' . $color );
	}

	//Check if reCAPTCHA enabled
	$recaptcha_enable = isset( $main_advanced_opts['recaptcha_enable'] ) ? true : false;
	if ( $recaptcha_enable && $cpt_is_password == 'no' ) {
		$download_button_code = sdm_get_download_form_with_recaptcha( $id, $shortcode_atts, 'sdm_download ' . $color );
	}

	if ( $cpt_is_password !== 'no' ) {//This is a password protected download so replace the download now button with password requirement
		$download_button_code = sdm_get_password_entry_form( $id, $shortcode_atts, 'sdm_download ' . $color );
	}
	//End of download now button code generation

	$output = '';
	switch ( $fancy ) {
		case '1':
			include_once 'includes/templates/fancy1/sdm-fancy-1.php';
			$output .= sdm_generate_fancy1_display_output( $shortcode_atts );
			$output .= '<div class="sdm_clear_float"></div>';
			break;
		case '2':
			include_once 'includes/templates/fancy2/sdm-fancy-2.php';
                        wp_enqueue_style( 'sdm_addons_listing', WP_SIMPLE_DL_MONITOR_URL . '/includes/templates/fancy2/sdm-fancy-2-styles.css', array(), WP_SIMPLE_DL_MONITOR_VERSION );
			$output .= sdm_generate_fancy2_display_output( $shortcode_atts );
			$output .= '<div class="sdm_clear_float"></div>';
			break;
		case '3':
			include_once 'includes/templates/fancy3/sdm-fancy-3.php';
			$output .= sdm_generate_fancy3_display_output( $shortcode_atts );
			$output .= '<div class="sdm_clear_float"></div>';
			break;
		default: // Default output is the standard download now button (fancy 0)
			include_once 'includes/templates/fancy0/sdm-fancy-0.php';
			$output .= sdm_generate_fancy0_display_output( $shortcode_atts );
	}

	return apply_filters( 'sdm_download_shortcode_output', $output, $atts );
}

function sdm_create_counter_shortcode( $atts ) {

	extract(
		shortcode_atts(
			array(
				'id' => '',
			),
			$atts
		)
	);

	if ( empty( $id ) ) {
		return '<p style="color: red;">' . __( 'Error! Please enter an ID value with this shortcode.', 'simple-download-monitor' ) . '</p>';
	}

	// Checks if to show count for all total download or any specific download.
	if ( preg_match( '/^all$/i', $id ) ) {
		$db_count = sdm_get_download_count_for_all_posts();
	} else {
		$db_count = sdm_get_download_count_for_post( $id );
	}

	// Set string for singular/plural results
	$string = ( $db_count == '1' ) ? __( 'Download', 'simple-download-monitor' ) : __( 'Downloads', 'simple-download-monitor' );

	$output = '<div class="sdm_download_count"><span class="sdm_count_number">' . $db_count . '</span><span class="sdm_count_string"> ' . $string . '</span></div>';
	// Return result
	return apply_filters( 'sdm_download_count_output', $output, $atts );
}

function sdm_show_latest_downloads( $args ) {

	extract(
		shortcode_atts(
			array(
				'number'        => '5',
				'fancy'         => '0',
				'button_text'   => '',
				'new_window'    => '',
				'orderby'       => 'post_date',
				'order'         => 'DESC',
				'category_slug' => '',
			),
			$args
		)
	);

	$query_args = array(
		'post_type'      => 'sdm_downloads',
		'show_posts'     => -1,
		'posts_per_page' => $number,
		'orderby'        => $orderby,
		'order'          => $order,
	);

	//Check if the query needs to be for a category
	if ( ! empty( $category_slug ) ) {
		$field = 'slug';
		$terms = $category_slug;

		//Add the category slug parameters for the query args
		$query_args['tax_query'] = array(
			array(
				'taxonomy' => 'sdm_categories',
				'field'    => $field,
				'terms'    => $terms,
			),
		);
	}

	// Query cpt's based on arguments above
	$get_posts = get_posts( $query_args );

	// If no cpt's are found
	if ( ! $get_posts ) {
		return '<p style="color: red;">' . __( 'There are no download items matching this shortcode criteria.', 'simple-download-monitor' ) . '</p>';
	}
	// Else iterate cpt's
	else {

		$output = '';
		if ( $fancy == '0' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy0/sdm-fancy-0.php';
			$output .= sdm_generate_fancy0_latest_downloads_display_output( $get_posts, $args );
		}
		if ( $fancy == '1' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy1/sdm-fancy-1.php';
			$output .= sdm_generate_fancy1_latest_downloads_display_output( $get_posts, $args );
		} elseif ( $fancy == '2' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy2/sdm-fancy-2.php';
			$output .= sdm_generate_fancy2_latest_downloads_display_output( $get_posts, $args );
		} elseif ( $fancy == '3' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy3/sdm-fancy-3.php';
			$output .= sdm_generate_fancy3_latest_downloads_display_output( $get_posts, $args );
		}

		// Return results
		return apply_filters( 'sdm_latest_downloads_shortcode_output', $output, $args, $get_posts );
	}  // End else iterate cpt's

}

function sdm_show_popular_downloads( $args ) {

	extract(
		shortcode_atts(
			array(
				'number'        => '5',
				'fancy'         => '0',
				'button_text'   => '',
				'new_window'    => '',
				'orderby'       => 'post_date',
				'order'         => 'DESC',
				'category_slug' => '',
			),
			$args
		)
	);

	global $wpdb;
	//Check if the query needs to be for a category
	if ( ! empty( $category_slug ) ) {
		$q = 'SELECT posts.*, downloads.id, downloads.post_id, terms.*, termrel.*, postmeta.*, (COUNT(downloads.post_id) + postmeta.meta_value) AS cnt'
		. ' FROM ' . $wpdb->prefix . 'posts as posts, ' . $wpdb->prefix . 'sdm_downloads as downloads, ' . $wpdb->prefix . 'terms as terms, ' . $wpdb->prefix . 'term_relationships as termrel, ' . $wpdb->prefix . 'postmeta as postmeta WHERE'
		. ' posts.id=downloads.post_id'
		. " AND (postmeta.meta_key='sdm_count_offset' AND postmeta.post_id=downloads.post_id)"
		. ' AND (terms.slug= %s AND termrel.object_id=downloads.post_id AND termrel.term_taxonomy_id=terms.term_id)'
		. ' GROUP BY downloads.post_id'
		. ' ORDER BY cnt DESC, %s %s'
		. ' LIMIT %d;';
		$q = $wpdb->prepare( $q, $category_slug, $orderby, $order, $number );
	} else {
		//no categury_slug present
		$q = 'SELECT posts.*, downloads.id, downloads.post_id, postmeta.*, (COUNT(downloads.post_id) + postmeta.meta_value) AS cnt'
		. ' FROM ' . $wpdb->prefix . 'posts as posts, ' . $wpdb->prefix . 'sdm_downloads as downloads, ' . $wpdb->prefix . 'postmeta as postmeta WHERE'
		. ' posts.id=downloads.post_id'
		. " AND (postmeta.meta_key='sdm_count_offset' AND postmeta.post_id=downloads.post_id)"
		. ' GROUP BY downloads.post_id'
		. ' ORDER BY cnt DESC, %s %s'
		. ' LIMIT %d;';
		$q = $wpdb->prepare( $q, $orderby, $order, $number );
	}

	$get_posts = $wpdb->get_results( $q );

	// If no cpt's are found
	if ( ! $get_posts ) {
		return '<p style="color: red;">' . __( 'There are no download items matching this shortcode criteria.', 'simple-download-monitor' ) . '</p>';
	}
	// Else iterate cpt's
	else {

		$output = '';
		if ( $fancy == '0' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy0/sdm-fancy-0.php';
			$output .= sdm_generate_fancy0_popular_downloads_display_output( $get_posts, $args );
		} elseif ( $fancy == '1' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy1/sdm-fancy-1.php';
			$output .= sdm_generate_fancy1_popular_downloads_display_output( $get_posts, $args );
		} elseif ( $fancy == '2' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy2/sdm-fancy-2.php';
			$output .= sdm_generate_fancy2_popular_downloads_display_output( $get_posts, $args );
		} elseif ( $fancy == '3' ) {
			include_once WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy3/sdm-fancy-3.php';
			$output .= sdm_generate_fancy3_popular_downloads_display_output( $get_posts, $args );
		}

		// Return results
		return apply_filters( 'sdm_popular_downloads_shortcode_output', $output, $args, $get_posts );
	}  // End else iterate cpt's
}

function sdm_create_simple_download_link( $atts ) {
	extract(
		shortcode_atts(
			array(
				'id' => '',
			),
			$atts
		)
	);

	if ( empty( $id ) ) {
		return '<p style="color: red;">' . __( 'Error! Please enter an ID value with this shortcode.', 'simple-download-monitor' ) . '</p>';
	}

	return WP_SIMPLE_DL_MONITOR_SITE_HOME_URL . '/?sdm_process_download=1&download_id=' . $id;
}

function sdm_handle_show_all_dl_shortcode( $args ) {
	if ( isset( $args['category_id'] ) ) {
		unset( $args['category_id'] );
	}
	if ( isset( $args['category_slug'] ) ) {
		unset( $args['category_slug'] );
	}
	$args['show_all'] = 1;
	return sdm_handle_category_shortcode( $args );
}

function sdm_handle_category_shortcode( $args ) {

	extract(
		shortcode_atts(
			array(
				'category_slug' => '',
				'category_id'   => '',
				'fancy'         => '0',
				'button_text'   => __( 'Download Now!', 'simple-download-monitor' ),
				'new_window'    => '',
				'orderby'       => 'post_date',
				'order'         => 'DESC',
				'pagination'    => '',
			),
			$args
		)
	);

	// Define vars
	$field = '';
	$terms = '';

	// If category slug and category id are empty.. return error
	if ( empty( $category_slug ) && empty( $category_id ) && empty( $args['show_all'] ) ) {
		return '<p style="color: red;">' . __( 'Error! You must enter a category slug OR a category id with this shortcode. Refer to the documentation for usage instructions.', 'simple-download-monitor' ) . '</p>';
	}

	// If both category slug AND category id are defined... return error
	if ( ! empty( $category_slug ) && ! empty( $category_id ) ) {
		return '<p style="color: red;">' . __( 'Error! Please enter a category slug OR id; not both.', 'simple-download-monitor' ) . '</p>';
	}

	// Else setup query arguments for category_slug
	if ( ! empty( $category_slug ) && empty( $category_id ) ) {

		$field = 'slug';

		$terms = array_filter(
			explode( ',', $category_slug ),
			function( $value ) {
				return ! empty( $value ) ? trim( $value ) : false;
			}
		);
	}
	// Else setup query arguments for category_id
	elseif ( ! empty( $category_id ) && empty( $category_slug ) ) {

		$field = 'term_id';
		//$terms = $category_id;
		$terms = array_filter(
			explode( ',', $category_id ),
			function( $value ) {
				return ! empty( $value ) ? trim( $value ) : false;
			}
		);
	}

	if ( isset( $args['show_all'] ) ) {
		$tax_query = array();
	} else {
		$tax_query = array(
			array(
				'taxonomy' => 'sdm_categories',
				'field'    => $field,
				'terms'    => $terms,
			),
		);
	}

	// For pagination
	$paged = ( get_query_var( 'paged' ) ) ? absint( get_query_var( 'paged' ) ) : 1;
	if ( isset( $args['pagination'] ) ) {
		if ( ! is_numeric( $args['pagination'] ) ) {
			return '<p style="color: red;">' . __( 'Error! You must enter a numeric number for the "pagination" parameter of the shortcode. Refer to the usage documentation.', 'simple-download-monitor' ) . '</p>';
		}
		$posts_per_page = $args['pagination'];
	} else {
		$posts_per_page = 9999;
	}

	// Query cpt's based on arguments above
	$get_posts_args = array(
		'post_type'      => 'sdm_downloads',
		'show_posts'     => -1,
		'posts_per_page' => $posts_per_page,
		'tax_query'      => $tax_query,
		'orderby'        => $orderby,
		'order'          => $order,
		'paged'          => $paged,
	);

	$query = new WP_Query();

	$get_posts = $query->query( $get_posts_args );

	// If no cpt's are found
	if ( ! $get_posts ) {
		return '<p style="color: red;">' . __( 'There are no download items matching this category criteria.', 'simple-download-monitor' ) . '</p>';
	}
	// Else iterate cpt's
	else {

		$output = '';

		// See if user color option is selected
		$main_opts = get_option( 'sdm_downloads_options' );
		$color_opt = isset( $main_opts['download_button_color'] ) ? $main_opts['download_button_color'] : null;
		$def_color = isset( $color_opt ) ? str_replace( ' ', '', strtolower( $color_opt ) ) : 'green';

		if ( $fancy == '0' ) {

			// Setup download location
			$homepage = get_bloginfo( 'url' );
			if ( empty( $new_window ) ) {
				$new_window = get_post_meta( $id, 'sdm_item_new_window', true );
			}

			$window_target = empty( $new_window ) ? '_self' : '_blank';

			// Iterate cpt's
			foreach ( $get_posts as $item ) {

				// Set download location
				$id           = $item->ID;  // get each cpt ID
				$download_url = $homepage . '/?sdm_process_download=1&download_id=' . $id;

				// Get each cpt title
				$item_title = get_the_title( $id );

				// Setup download button code
				$download_button_code = '<a href="' . $download_url . '" class="sdm_download ' . $def_color . '" title="' . esc_html($item_title) . '" target="' . $window_target . '">' . esc_attr($button_text) . '</a>';

				$main_advanced_opts = get_option( 'sdm_advanced_options' );

				//Check if Terms & Condition enabled
				$termscond_enable = isset( $main_advanced_opts['termscond_enable'] ) ? true : false;
				if ( $termscond_enable ) {
					$download_button_code = sdm_get_download_form_with_termsncond( $id, $args, 'sdm_download ' . $def_color );
				}

				//Check if reCAPTCHA enabled
				$recaptcha_enable = isset( $main_advanced_opts['recaptcha_enable'] ) ? true : false;
				if ( $recaptcha_enable ) {
					$download_button_code = sdm_get_download_form_with_recaptcha( $id, $args, 'sdm_download ' . $def_color );
				}

				// Generate download buttons
				$output .= '<div class="sdm_download_link">' . $download_button_code . '</div><br />';
			}  // End foreach
		}
		// Fancy 1 and onwards handles the loop inside the template function
		elseif ( $fancy == '1' ) {
			include_once 'includes/templates/fancy1/sdm-fancy-1.php';
			$output .= sdm_generate_fancy1_category_display_output( $get_posts, $args );
		} elseif ( $fancy == '2' ) {
			include_once 'includes/templates/fancy2/sdm-fancy-2.php';
			$output .= sdm_generate_fancy2_category_display_output( $get_posts, $args );
		} elseif ( $fancy == '3' ) {
			include_once 'includes/templates/fancy3/sdm-fancy-3.php';
			$output .= sdm_generate_fancy3_category_display_output( $get_posts, $args );
		}

		// Pagination related
		if ( isset( $args['pagination'] ) ) {
			$posts_per_page      = $args['pagination'];
			$count_sdm_posts     = $query->found_posts;
			$published_sdm_posts = $count_sdm_posts;
			$total_pages         = ceil( $published_sdm_posts / $posts_per_page );

			$big        = 999999999; // Need an unlikely integer
			$pagination = paginate_links(
				array(
					'base'      => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
					'format'    => '',
					'add_args'  => '',
					'current'   => max( 1, get_query_var( 'paged' ) ),
					'total'     => $total_pages,
					'prev_text' => '&laquo;',
					'next_text' => '&raquo;',
				)
			);
			$output    .= '<div class="sdm_pagination">' . $pagination . '</div>';
		}

		// Return results
		return apply_filters( 'sdm_category_download_items_shortcode_output', $output, $args, $get_posts );
	}  // End else iterate cpt's
}

function sdm_download_categories_shortcode() {

	function custom_taxonomy_walker( $taxonomy, $parent = 0 ) {

		// Get terms (check if has parent)
		$terms = get_terms(
			$taxonomy,
			array(
				'parent'     => $parent,
				'hide_empty' => false,
			)
		);

		// If there are terms, start displaying
		if ( count( $terms ) > 0 ) {
			// Displaying as a list
			$out = '<ul>';
			// Cycle though the terms
			foreach ( $terms as $term ) {
				// Secret sauce. Function calls itself to display child elements, if any
				$out .= '<li class="sdm_cat" id="' . $term->slug . '"><span id="' . $term->term_id . '" class="sdm_cat_title" style="cursor:pointer;">' . $term->name . '</span>';
				$out .= '<p class="sdm_placeholder" style="margin-bottom:0;"></p>' . custom_taxonomy_walker( $taxonomy, $term->term_id );
				$out .= '</li>';
			}
			$out .= '</ul>';
			return $out;
		}
		return;
	}

	return '<div class="sdm_object_tree">' . custom_taxonomy_walker( 'sdm_categories' ) . '</div>';
}

function sdm_download_categories_list_shortcode( $attributes ) {

	$atts = shortcode_atts(
		array(
			'class'        => 'sdm-download-categories', // wrapper class
			'empty'        => '0', // show empty categories
			'numbered'     => '0', // use <ol> instead of <ul> to wrap the list
			'count'        => '0', // display count of items in every category
			'hierarchical' => '1', // display subcategories as well
		),
		$attributes
	);

	return '<div class="' . esc_attr( $atts['class'] ) . '">'
	. sdm_download_categories_list_walker( $atts )
	. '</div>';
}

function sdm_search_form_shortcode( $args ) {
	$atts = shortcode_atts(
		array(
			'fancy'                  => '',
			'class'                  => '', // wrapper class
			'placeholder'            => 'Search...', // placeholder for search input
			'description_max_length' => 50, // short description symbols count
		),
		$args
	);

	global $wpdb;

	// Check if we have a search value posted
	$s_term = isset( $_POST['sdm_search_term'] ) ? stripslashes( sanitize_text_field( esc_html( $_POST['sdm_search_term'] ) ) ) : '';

	if ( ! empty( $s_term ) ) {
		// we got search term posted
		$keywords_searched = array();
		$posts_collection  = array();
		$parts             = explode( ' ', $s_term );
		foreach ( $parts as $keyword ) {
			if ( strlen( $keyword ) < 3 ) {
				//Ignore keywords less than 3 characters long
				continue;
			}

			$keywords_searched[] = $keyword;

			$querystr     = "
	    SELECT $wpdb->posts.*, $wpdb->postmeta.meta_value as description
	    FROM $wpdb->posts, $wpdb->postmeta
	    WHERE $wpdb->posts.ID = $wpdb->postmeta.post_id
	    AND $wpdb->posts.post_status = 'publish'
	    AND $wpdb->posts.post_type = 'sdm_downloads'
	    AND ($wpdb->posts.post_title LIKE '%$keyword%'
	    OR ($wpdb->postmeta.meta_key='sdm_description' AND $wpdb->postmeta.meta_value LIKE '%$keyword%') )
	    GROUP BY $wpdb->posts.ID
	    ";
			$query_result = $wpdb->get_results( $querystr, OBJECT );

			//Merge the results of this keyword with the collection array. Also remove any duplicate.
			$posts_collection = array_merge( $posts_collection, $query_result );
			//$posts_collection = array_unique(array_merge($posts_collection, $query_result), SORT_REGULAR);
		}

		//Lets get rid of any duplicates
		$unique_posts_collection_id = array();
		foreach ( $posts_collection as $key => $post ) {
			if ( in_array( $post->ID, $unique_posts_collection_id ) ) {
				//This is a duplicate.
				unset( $posts_collection[ $key ] );//Delete this entry from the collection.
			} else {
				//This post ID is not in the collection yet. Add it.
				$unique_posts_collection_id[] = $post->ID;
			}
		}

		//Create the result entries output using a template.
		$s_results = sdm_generate_search_result_using_template( $posts_collection, $atts );

		//Show the search result
		if ( ! empty( $s_results ) ) {
			$result_output  = '<h2 class="sdm_search_result_heading">' . __( 'Showing search results for ', 'simple-download-monitor' ) . '"' . $s_term . '"</h2>';
			$result_output .= '<div class="sdm_search_result_number_of_items">' . __( 'Number of items found: ', 'simple-download-monitor' ) . count( $posts_collection ) . '</div>';
			$result_output .= '<div class="sdm_search_result_keywords">' . __( 'Keywords searched: ', 'simple-download-monitor' ) . implode( ', ', $keywords_searched ) . '</div>';
			$result_output .= '<div class="sdm_search_result_listing">' . $s_results . '</div>';
		} else {
			$result_output = '<h2 class="sdm_search_result_heading">' . __( 'Nothing found for ', 'simple-download-monitor' ) . '"' . $s_term . '".</h2>';
		}
	}
	$out  = '';
	$out .= '<form id="sdm_search_form" class="' . sanitize_html_class( $atts['class'], '' ) . '" method="POST">';
	$out .= '<input type="search" class="search-field" name="sdm_search_term" value="' . $s_term . '" placeholder="' . sdm_sanitize_text( $atts['placeholder'] ) . '">';
	$out .= '<input type="submit" class="sdm_search_submit" name="sdm_search_submit" value="Search">';
	$out .= '</form>';
	$out .= isset( $result_output ) ? $result_output : '';

	return $out;
}

function sdm_show_download_info_shortcode( $args ) {
	extract(
		shortcode_atts(
			array(
				'id'            => '',
				'download_info' => '',
			),
			$args
		)
	);

	if ( empty( $id ) || empty( $download_info ) ) {
		return '<div class="sdm_shortcode_error">Error! you must enter a value for "id" and "download_info" parameters.</div>';
	}

	//Available values: title, description, download_url, thumbnail, file_size, file_version, download_count

	$id             = absint( $id );
	$get_cpt_object = get_post( $id );

	if ( $download_info == 'title' ) {//download title
		$item_title = get_the_title( $id );
		return $item_title;
	}

	if ( $download_info == 'description' ) {//download description
		$item_description = sdm_get_item_description_output( $id );
		return $item_description;
	}

	if ( $download_info == 'download_url' ) {//download URL
		$download_link = get_post_meta( $id, 'sdm_upload', true );
		return $download_link;
	}

	if ( $download_info == 'thumbnail' ) {//download thumb
		$download_thumbnail = get_post_meta( $id, 'sdm_upload_thumbnail', true );
		$download_thumbnail = '<img class="sdm_download_thumbnail_image" src="' . $download_thumbnail . '" />';
		return $download_thumbnail;
	}

	if ( $download_info == 'thumbnail_url' ) {//download thumbnail raw URL
		$download_thumbnail = get_post_meta( $id, 'sdm_upload_thumbnail', true );
		return $download_thumbnail;
	}

	if ( $download_info == 'file_size' ) {//download file size
		$file_size = get_post_meta( $id, 'sdm_item_file_size', true );
		return $file_size;
	}

	if ( $download_info == 'file_version' ) {//download file version
		$file_version = get_post_meta( $id, 'sdm_item_version', true );
		return $file_version;
	}

	if ( $download_info == 'download_count' ) {//download count
		$dl_count = sdm_get_download_count_for_post( $id );
		return $dl_count;
	}

	return '<div class="sdm_shortcode_error">Error! The value of "download_info" field does not match any availalbe parameters.</div>';
}