Instagram Feed Shortcode

function display_instagram( $atts = array(), $preview_settings = false ) {
	do_action( 'sbi_before_display_instagram' );

	$database_settings = sbi_get_database_settings();

	if ( $database_settings['sb_instagram_ajax_theme'] !== 'on'
		 && $database_settings['sb_instagram_ajax_theme'] !== 'true'
		 && $database_settings['sb_instagram_ajax_theme'] !== '1'
		 && $database_settings['sb_instagram_ajax_theme'] !== true ) {
		wp_enqueue_script( 'sbi_scripts' );
	}

	if ( $database_settings['enqueue_css_in_shortcode'] === 'on' || $database_settings['enqueue_css_in_shortcode'] === 'true' || $database_settings['enqueue_css_in_shortcode'] === true ) {
		wp_enqueue_style( 'sbi_styles' );
	}

	$instagram_feed_settings = new SB_Instagram_Settings( $atts, $database_settings, $preview_settings );

	$early_settings = $instagram_feed_settings->get_settings();;
	if ( empty( $early_settings ) && ! sbi_doing_customizer( $atts ) ) {
		$style = current_user_can( 'manage_instagram_feed_options' ) ? ' style="display: block;"' : '';
		$id = isset( $atts['feed'] ) ? (int)$atts['feed'] : false;
		if ( $id ) {
			$message = sprintf( __( 'Error: No feed with the ID %s found.', 'instagram-feed' ), $id  );
		} else {
			$message = __( 'Error: No feed found.', 'instagram-feed' );
		}
		ob_start(); ?>
		<div id="sbi_mod_error" <?php echo $style; ?>>
			<span><?php esc_html_e('This error message is only visible to WordPress admins', 'instagram-feed' ); ?></span><br />
			<p><strong><?php echo esc_html( $message ); ?></strong>
			<p><?php esc_html_e( 'Please go to the Instagram Feed settings page to create a feed.', 'instagram-feed' ); ?></p>
		</div>
		<?php
		$html = ob_get_contents();
		ob_get_clean();
		return $html;
	}

	$instagram_feed_settings->set_feed_type_and_terms();
	$instagram_feed_settings->set_transient_name();
	$transient_name = $instagram_feed_settings->get_transient_name();
	$settings = $instagram_feed_settings->get_settings();
	$feed_type_and_terms = $instagram_feed_settings->get_feed_type_and_terms();

	$instagram_feed = new SB_Instagram_Feed( $transient_name );

	$instagram_feed->set_cache( $instagram_feed_settings->get_cache_time_in_seconds(), $settings );

	if ( $settings['caching_type'] === 'background' ) {
		$instagram_feed->add_report( 'background caching used' );
		if ( $instagram_feed->regular_cache_exists() ) {
			$instagram_feed->add_report( 'setting posts from cache' );
			$instagram_feed->set_post_data_from_cache();
		}

		if ( $instagram_feed->need_to_start_cron_job() ) {
			$instagram_feed->add_report( 'setting up feed for cron cache' );
			$to_cache = array(
                'atts' => $atts,
                'last_requested' => time(),
		    );

			$instagram_feed->set_cron_cache( $to_cache, $instagram_feed_settings->get_cache_time_in_seconds() );

			SB_Instagram_Cron_Updater::do_single_feed_cron_update( $instagram_feed_settings, $to_cache, $atts, false );
			$instagram_feed->set_cache( $instagram_feed_settings->get_cache_time_in_seconds(), $settings );
			$instagram_feed->set_post_data_from_cache();
		} elseif ( $instagram_feed->should_update_last_requested() ) {
			$instagram_feed->add_report( 'updating last requested' );
			$to_cache = array(
				'last_requested' => time(),
			);

			$instagram_feed->set_cron_cache( $to_cache, $instagram_feed_settings->get_cache_time_in_seconds(), $settings['backup_cache_enabled'] );
		}

    } elseif ( $instagram_feed->regular_cache_exists() ) {
		$instagram_feed->add_report( 'page load caching used and regular cache exists' );
		$instagram_feed->set_post_data_from_cache();

        if ( $instagram_feed->need_posts( $settings['num'] ) && $instagram_feed->can_get_more_posts() ) {
	        while ( $instagram_feed->need_posts( $settings['num'] ) && $instagram_feed->can_get_more_posts() ) {
				$instagram_feed->add_remote_posts( $settings, $feed_type_and_terms, $instagram_feed_settings->get_connected_accounts_in_feed() );
			}
			$instagram_feed->cache_feed_data( $instagram_feed_settings->get_cache_time_in_seconds(), $settings['backup_cache_enabled'] );
		}

	} else {
		$instagram_feed->add_report( 'no feed cache found' );

		while ( $instagram_feed->need_posts( $settings['num'] ) && $instagram_feed->can_get_more_posts() ) {
			$instagram_feed->add_remote_posts( $settings, $feed_type_and_terms, $instagram_feed_settings->get_connected_accounts_in_feed() );
		}

		if ( ! $instagram_feed->should_use_backup() ) {
			$instagram_feed->cache_feed_data( $instagram_feed_settings->get_cache_time_in_seconds(), $settings['backup_cache_enabled'] );
		}

	}

	if ( $instagram_feed->should_use_backup() ) {
		$instagram_feed->add_report( 'trying to use backup' );
		$instagram_feed->maybe_set_post_data_from_backup();
		$instagram_feed->maybe_set_header_data_from_backup();
	}

	// if need a header
	if ( $instagram_feed->need_header( $settings, $feed_type_and_terms ) ) {
		if ( $instagram_feed->should_use_backup() && $settings['minnum'] > 0 ) {
			$instagram_feed->add_report( 'trying to set header from backup' );
			$header_cache_success = $instagram_feed->maybe_set_header_data_from_backup();
		} elseif ( $instagram_feed->regular_header_cache_exists() ) {
			// set_post_data_from_cache
			$instagram_feed->add_report( 'page load caching used and regular header cache exists' );
			$instagram_feed->set_header_data_from_cache();
		} else {
			$instagram_feed->add_report( 'no header cache exists' );
			$instagram_feed->set_remote_header_data( $settings, $feed_type_and_terms, $instagram_feed_settings->get_connected_accounts_in_feed() );
			$instagram_feed->cache_header_data( $instagram_feed_settings->get_cache_time_in_seconds(), $settings['backup_cache_enabled'] );
		}
	} else {
		$instagram_feed->add_report( 'no header needed' );
	}

	if ( $settings['resizeprocess'] === 'page' ) {
		$instagram_feed->add_report( 'resizing images for post set' );
		$post_data = $instagram_feed->get_post_data();
		$post_data = array_slice( $post_data, 0, $settings['num'] );

		$post_set = new SB_Instagram_Post_Set( $post_data, $transient_name );

		$post_set->maybe_save_update_and_resize_images_for_posts();
    }

	if ( $settings['disable_js_image_loading'] || $settings['imageres'] !== 'auto' ) {
		global $sb_instagram_posts_manager;
		$post_data = $instagram_feed->get_post_data();

		if ( ! $sb_instagram_posts_manager->image_resizing_disabled() ) {
			$image_ids = array();
			foreach ( $post_data as $post ) {
				$image_ids[] = SB_Instagram_Parse::get_post_id( $post );
			}
			$resized_images = SB_Instagram_Feed::get_resized_images_source_set( $image_ids, 0, $transient_name );

			$instagram_feed->set_resized_images( $resized_images );
		}
	}

	return $instagram_feed->get_the_feed_html( $settings, $atts, $instagram_feed_settings->get_feed_type_and_terms(), $instagram_feed_settings->get_connected_accounts_in_feed() );
}