Automatic emails sent to wordpress admins depending on the status of a post. Easy ability for team members to keep up to date with content publishing without going into the backend.

wp_post_mail_hooks.php

/*=========================================
Draft to Under Construction Project Hook
Upon changing the status of a post with a specific parent from draft to published, send an email notifying the team.
Codex reference: https://codex.wordpress.org/Post_Status_Transitions
=========================================*/

function draft_to_under_construction_project( $new_status, $old_status, $post ) {

	if ($post->post_type == 'projects' && $post->post_parent == 7334 && $old_status == 'draft' && $new_status == 'publish') {

		$multiple_recipients = array(
			'celso.white13@gmail.com'
		);
		$subject = "New Project Posted";
		$title = $post->post_title;
		$link = get_post_permalink($post->ID);
		$message = 'A new project, ' . $title . ', has moved from draft to under constuction. View the project <a href="' . $link . '">here.</a>';
		$headers = array('From: The Water Trust <admin@watertrust.org>', 'Content-Type: text/html; charset=UTF-8');
		wp_mail( $multiple_recipients, $subject, $message, $headers );
	}

}

add_action('transition_post_status', 'draft_to_under_construction_project', 10, 3);

/*=========================================
Draft to Complete Project Hook
Upon changing the status of a post from draft to published, send an email notifying the team.
Codex reference: https://codex.wordpress.org/Post_Status_Transitions
=========================================*/

function draft_to_published_project( $new_status, $old_status, $post ) {

	if ($post->post_type == 'projects' && $post->post_parent !== 7334 && $old_status == 'draft' && $new_status == 'publish') {
		$multiple_recipients = array(
			'celso.white13@gmail.com'
		);
		$subject = "New Project Posted";
		$title = $post->post_title;
		$link = get_post_permalink($post->ID);
		$message = 'A new project, ' . $title . ', has been published. View the project <a href="' . $link . '">here.</a>';
		$headers = array('From: The Water Trust <admin@watertrust.org>', 'Content-Type: text/html; charset=UTF-8');
		wp_mail( $multiple_recipients, $subject, $message, $headers );
	}

}

add_action('transition_post_status', 'draft_to_published_project', 10, 3);

/*=========================================
Under Construction to Complete Hook
Upon changing a published post from one parent type to another, send an email notifying the team.
Codex reference: https://codex.wordpress.org/Plugin_API/Action_Reference/post_updated
=========================================*/

function under_construction_to_complete($post_ID, $post_after, $post_before) {

	if ($post_before->post_parent == 7334 && ($post_after->post_parent == 9 || $post_after->post_parent == 7)) {
		$multiple_recipients = array(
			'celso.white13@gmail.com'
		);
		$subject = "Project Complete";
		$title = $post_after->post_title;
		$link = get_post_permalink($post_ID);
		$message = 'The project ' . $title . ' has moved from under construction to complete. View the project <a href="' . $link . '">here.</a>';
		$headers = array('From: The Water Trust <admin@watertrust.org>', 'Content-Type: text/html; charset=UTF-8');
		wp_mail( $multiple_recipients, $subject, $message, $headers );
	}

}

add_action('post_updated', 'under_construction_to_complete', 10, 3);