Plugin to import from MyNewsDesk - full plugin

mynewsdesk-importer.php

<?php
/*
Plugin Name: MyNewsDesk Importer
Description: Imports news via API from NyNewsDesk as post type for news
Version: 1.0
Author: Webbgaraget
Author URI: http://www.webbgaraget.se
*/
class MND_News_Importer
{
	// URL for MyNewsDesk API
	const MND_URL   = 'http://www.mynewsdesk.com/services/pressroom/list/[unique_key]/?type_of_media=news&format=json';
	
	// Name of WP cron job
	const CRON_NAME = 'mnd-import-api';
	
	// Meta key where posts feed id will be stored
	const META_KEY  = 'mnd-id';

	protected static $instance = null;

	/**
	 * Access to the working instance of this class
	 *
	 * @wp-hook plugins_loaded
	 * @return Ngn_Pr_Importer
	 */
	public static function get_instance()
	{
		null === self::$instance and self::$instance = new self;
		return self::$instance;
	}

	/**
	 * Constructor. Intentionally left empty and public.
	 *
	 * @see plugin_setup()
	 */
	public function __construct() {}

	/**
	 * Initalizes the plugin
	 * @wp-hook plugins_loaded
	 */
	public function plugin_setup()
	{
		$this->_schedule_import();
		add_action( self::CRON_NAME, array( $this, 'add_new_entries' ) );
		
		// If you add '/?mnd-news-force-import' to the url you force the import of news
		if ( isset( $_GET['mnd-news-force-import'] ) )
			add_action( 'wp', array( $this, 'add_and_update_entries' ) );
	}

	/**
	 * Schedule the import hook to be run hourly
	 */
	private function _schedule_import()
	{
		// If the schedule isn't set
		if ( !wp_next_scheduled( self::CRON_NAME ) )
		{
			// Use the built in function wp_schedule event to run the function every hour
			wp_schedule_event( time(), 'hourly', self::CRON_NAME );
		}
	}

	/**
	 * Import the entries
	 */
	public function add_and_update_entries()
	{
		// Get the news (see previous gist)
		$entries = $this->_get_entries();
		
		// Create an empty array where we will save post information
		$entry_info = [];

		// This avoids an error being produced in WPML when doing wp_insert_post()
		unset( $_GET['doing_wp_cron'] );

		// Loop through the news
		foreach( $entries->items->item as $item )
		{
			// Save the information for the post creation
			$id       = $item->id;
			$title    = $item->header;
			$excerpt  = $item->summary;
			$content  = $item->body;
			$dateTime = DateTime::createFromFormat( 'Y-m-d H:i:s', $item->updated_at );
			$date     = $dateTime->format( "F j, Y" );
			$postdate = $dateTime->format( "Y-m-d H:i:s" );

			// Get the terms for the custom post type, in this case news-cat
			$existing_terms = get_terms( 'news-cat' );

			// Create empty variables for saving the rest of the information you want
			$image = '';
			$categories = '';
			$contacts = '';
			$boilerplate = '';
			$lang = '';

			// If the information you want i set, save it in the variable
			if(isset($item->image))
				$image    = $item->image; //string
			if(isset($item->subjects) && is_object($item->subjects) )
				$categories     = $item->subjects; //object
			if(isset($item->contact_people) && is_object($item->contact_people) )
				$contacts = $item->contact_people; //object
			if(isset($item->boilerplate))
				$boilerplate = $item->boilerplate; //string
			if(isset($item->language))
				$lang = $item->language; //string

			// Query existing posts of the cpt to see if there
			// is a post with the current ID saved in a metabox
			$args = array(
				'meta_key' => self::META_KEY,
				'meta_value' => $id,
				'post_type' => 'cpt_news'
			);

			$query = new WP_Query( $args );

			// If post doesn't exist, create it
			if ( $query->post_count < 1 )
			{
				// Setup post data
				// Important, do not add the ID, then it will try to
				// update a post with that ID (which does not exist)
				$post_data = array(
					// 'post_author'  => 1,
					'post_title'   => $title,
					'post_content' => $content,
					'post_excerpt' => $excerpt,
					'post_date'    => $postdate,
					'post_status'  => 'publish',
					'post_type'    => 'cpt_news',
				);

				// Create post
				$post_id = wp_insert_post( $post_data );
				// Add the news ID from MyNewsDesk as meta
				add_post_meta( $post_id, self::META_KEY, $id );

				// Set was_created to true
				$was_created = true;

				// Save title, date, id and if it was new in our empty array
				$entry_info[] = array(
					'title' => $title,
					'date'  => $date,
					'id'    => $id,
					'new'   => $was_created,
				);

				// If language is set, populate meta box news-language
				if( isset( $lang ) && $lang !== '' ) {
					add_post_meta( $post_id, 'news-language', $lang );
				}

				// If there is an image, populate meta box news-featured-image
				if( isset( $image ) && $image !== '' ) {
					add_post_meta( $post_id, 'news-featured-image', $image );
				}

				// If there are categories, add the categories to the post
				if( isset( $categories ) && $categories !== '' ) {
					// If there is only one category it is saved as a string
					if( is_string( $categories->subject ) )
					{
						// If the category doesn't exist, we create it
						if( !in_array( $categories->subject , $existing_terms ) )
						{
							wp_insert_term( $categories->subject, 'news-cat' );
						}

						$cat_slug = get_term_by( 'name', $categories->subject, 'news-cat' );
						$cat_slug = $cat_slug->slug;

						wp_set_object_terms( $post_id, $cat_slug, 'news-cat', true );
					}
					// If there are multiple categories it is saved as an array
					elseif( is_array( $categories->subject ) )
					{
						$previous_cats = array();

						foreach ($categories->subject as $cat)
						{
							// If the category doesn't exist, we create it
							if( !in_array( $cat, $existing_terms ) )
							{
								wp_insert_term( $cat, 'news-cat' );
							}

							$cat_slug = get_term_by( 'name', $cat, 'news-cat' );
							$cat_slug = $cat_slug->slug;

							wp_set_object_terms( $post_id, $cat_slug, 'news-cat', true );
						}
					}
				}

				// If there are contact persons, add name, title, image and contact information to the meta boxes
				if( isset( $contacts ) && $contacts !== '' ) {
					foreach( $contacts as $person )
					{
						$contact_name = $person->name;
						$contact_title = $person->title;
						$contact_phone = $person->phone;
						$contact_phone_alt = $person->phone_alternative;
						$contact_mail = $person->email;
						$contact_image = $person->image;
					}

					add_post_meta( $post_id, 'contact-name', $contact_name );
					add_post_meta( $post_id, 'contact-title', $contact_title );
					add_post_meta( $post_id, 'contact-phone', $contact_phone );
					add_post_meta( $post_id, 'contact-phone-alt', $contact_phone_alt );
					add_post_meta( $post_id, 'contact-mail', $contact_mail );
					add_post_meta( $post_id, 'contact-image', $contact_image );
				}

				// If there is an boilerplate, populate meta box news-boilerplate
				if( isset( $boilerplate ) && $boilerplate !== '' )
				{
					add_post_meta( $post_id, 'news-boilerplate', $boilerplate );
				}

			}
			else
			{
				// Update existing post
				// Get the post that already exists
				$args = array(
					'meta_key' => self::META_KEY,
					'meta_value' => $id,
					'post_type' => 'cpt_news'
				);

				$query = new WP_Query( $args );

				// Get the post ID
				$post_id = $query->posts[0]->ID;

				$post_data = array(
					'ID'  => $post_id,
					'post_title'   => $title,
					'post_content' => $content,
					'post_excerpt' => $excerpt,
				);

				// Update the existing posts content and excerpt
				wp_update_post( $post_data );

				// If language is set, populate meta box news-language
				if( isset( $lang ) && $lang !== '' ) {
					add_post_meta( $post_id, 'news-language', $lang ) || update_post_meta( $post_id, 'news-language', $lang );
				}

				// If there is an image, populate meta box news-featured-image
				if( isset( $image ) && $image !== '' ) {
					add_post_meta( $post_id, 'news-featured-image', $image ) || update_post_meta( $post_id, 'news-featured-image', $image );
				}

				// If there are categories, add the categories to the post
				if( isset( $categories ) && $categories !== '' ) {
					if( is_string( $categories->subject ) )
					{
						// If the category doesn't exist, we create it
						if( !in_array( $categories->subject , $existing_terms ) )
						{
							wp_insert_term( $categories->subject, 'news-cat' );
						}

						$cat_slug = get_term_by( 'name', $categories->subject, 'news-cat' );
						$cat_slug = $cat_slug->slug;

						wp_set_object_terms( $post_id, $cat_slug, 'news-cat', true );
					}
					elseif( is_array( $categories->subject ) )
					{
						$previous_cats = array();

						foreach ($categories->subject as $cat)
						{
							// If the category doesn't exist, we create it
							if( !in_array( $cat, $existing_terms ) )
							{
								wp_insert_term( $cat, 'news-cat' );
							}

							$cat_slug = get_term_by( 'name', $cat, 'news-cat' );
							$cat_slug = $cat_slug->slug;

							wp_set_object_terms( $post_id, $cat_slug, 'news-cat', true );
						}
					}
				}

				// If there are contact persons, update name, title, image and contact information
				if( isset( $contacts ) && $contacts !== '' ) {
					foreach( $contacts as $person )
					{
						$contact_name = $person->name;
						$contact_title = $person->title;
						$contact_phone = $person->phone;
						$contact_phone_alt = $person->phone_alternative;
						$contact_mail = $person->email;
						$contact_image = $person->image;
					}

					add_post_meta( $post_id, 'contact-name', $contact_name ) || update_post_meta( $post_id, 'contact-name', $contact_name );
					add_post_meta( $post_id, 'contact-title', $contact_title ) || update_post_meta( $post_id, 'contact-title', $contact_title );
					add_post_meta( $post_id, 'contact-phone', $contact_phone ) || update_post_meta( $post_id, 'contact-phone', $contact_phone );
					add_post_meta( $post_id, 'contact-phone-alt', $contact_phone_alt ) || update_post_meta( $post_id, 'contact-phone-alt', $contact_phone_alt );
					add_post_meta( $post_id, 'contact-mail', $contact_mail ) || update_post_meta( $post_id, 'contact-mail', $contact_mail );
					add_post_meta( $post_id, 'contact-image', $contact_image ) || update_post_meta( $post_id, 'contact-image', $contact_image );
				}
				
				// If there is a boilerplate, update it
				if( isset( $boilerplate ) && $boilerplate !== '' )
				{
					add_post_meta( $post_id, 'news-boilerplate', $boilerplate ) || update_post_meta( $post_id, 'news-boilerplate', $boilerplate );
				}

				// The post was updated, not created
				$was_created = false;
			}
		}

		exit();
	}

	/**
	 * Retrieve feed with news
	 * @return SimpleXMLElement The feed
	 */
	private function _get_entries()
	{
		$url = self::MND_URL;
		
		// Initialize session
		$process = curl_init( $url );
		
		// Set options for transfer 
		// (seconds the cURL functions can execute and return the transfer as string)
		curl_setopt( $process, CURLOPT_TIMEOUT, 30 );
		curl_setopt( $process, CURLOPT_RETURNTRANSFER, TRUE );
		
		// Perform session
		$feed = curl_exec( $process );
		
		// Close session
		curl_close( $process );

		// Parse the feed
		$entries = json_decode( $feed );
		
		// Return the results
		return $entries;
	}
}


add_action(
	'after_setup_theme',
	array( MND_News_Importer::get_instance(), 'plugin_setup' )
);