Add new status for custom post type with mail option for status change

This code will add new status in custom post type.

<?php

/*   Add custom status to post type */

add_action('init', function() {
PostStatusExtender::extend('jobs', array(
'pending' => array(
'label' => __('Pending', 'jobs'),
'public' => true,
'label_count' => _n_noop('Pending <span class="count">(%s)</span>', 'Pending <span class="count">(%s)</span>'),
),
'booked' => array(
'label' => __('Booked', 'jobs'),
'public' => true,
'label_count' => _n_noop('Booked <span class="count">(%s)</span>', 'Booked <span class="count">(%s)</span>'),
),

'complete' => array(
'label' => __('Completed', 'jobs'),
'public' => true,
'label_count' => _n_noop('Completed <span class="count">(%s)</span>', 'Completed <span class="count">(%s)</span>'),
),
'archived' => array(
'label' => __('Archived', 'jobs'),
'public' => true,
'label_count' => _n_noop('Archived <span class="count">(%s)</span>', 'Archived <span class="count">(%s)</span>'),
),
'cancel' => array(
'label' => __('Deleted', 'jobs'),
'public' => true,
'label_count' => _n_noop('Deleted  <span class="count">(%s)</span>', 'Deleted  <span class="count">(%s)</span>'),
)
));
});

class PostStatusExtender {

/**
* Extend
*
* Extend the current status list for the given post type
*
* @global \WP_POST $post
*
* @param string $postType the post type name , ex: product
* @param array $states array of states where key is the id(state id) and value
*                      is the state array
*/
public static function extend($postType, $states) {// print_r($states); die();
foreach ($states as $id => $state) {

register_post_status($id, $state);
}

add_action('admin_footer-post.php', function() use($postType, $states) {

global $post;
if (!$post || $post->post_type !== $postType) {
return false;
}

foreach ($states as $id => $state) {

printf(
'<script>'
. 'jQuery(document).ready(function($){'
. '   $("select#post_status").append("<option value=\"%s\" %s>%s</option>");'
. '   $("a.save-post-status").on("click",function(e){'
. '      e.preventDefault();'
. '      var value = $("select#post_status").val();'
. '      $("select#post_status").value = value;'
. '      $("select#post_status option").removeAttr("selected", true);'
. '      $("select#post_status option[value=\'"+value+"\']").attr("selected", true)'
. '    });'
. '});'
. '</script>'
, $id
, $post->post_status !== $id ? '' : 'selected=\"selected\"'
, $state['label']
);

if ($post->post_status === $id) {
printf(
'<script>'
. 'jQuery(document).ready(function($){'
. '   $(".misc-pub-section #post-status-display").text("%s");'
. '});'
. '</script>'
, $state['label']
);
}
}
});

add_action('admin_footer-edit.php', function() use($states, $postType) {

global $post;

if (!$post || $post->post_type !== $postType) {
return false;
}

foreach ($states as $id => $state) {
printf(
'<script>'
. 'jQuery(document).ready(function($){'
. " $('select[name=\"_status\"]' ).append( '<option value=\"%s\">%s</option>' );"
. '});'
. '</script>'
, $id
, $state['label']
);
}
});

add_filter('display_post_states', function($states, $post) use($states, $postType) {

foreach ($states as $id => $state) {
if ($post->post_type == $postType && $post->post_status === $id) {
return array($state['label']);
} else {
if (array_key_exists($id, $states)) {
unset($states[$id]);
}
}
}

return $states;
}, 10, 2);
}

}

/*     post status changed hook     */

/*  MANAGE META BOX based on status  */
add_action('do_meta_boxes', 'change_meta_box');
function change_meta_box() {
global $wp_meta_boxes;

$wp_meta_boxes['jobs']['side']['core']['submitdiv']['callback']= 'hardy_custom_status';
}

function hardy_custom_status($post, $args = array()){
global $action;

$post_type = $post->post_type;
$post_type_object = get_post_type_object($post_type);
$can_publish = current_user_can($post_type_object->cap->publish_posts);
?>
<div class="submitbox" id="submitpost">

<div id="minor-publishing">

<?php // Hidden submit button early on so that the browser chooses the right button when form is submitted with Return key ?>
<div style="display:none;">
<?php submit_button( __( 'Save' ), '', 'save' ); ?>
</div>

<div id="minor-publishing-actions">
<div id="save-action">
<?php if ( 'publish' != $post->post_status && 'future' != $post->post_status && 'pending' != $post->post_status ) { ?>
<input <?php if ( 'private' == $post->post_status ) { ?>style="display:none"<?php } ?> type="submit" name="save" id="save-post" value="<?php esc_attr_e('Save Draft'); ?>" class="button" />
<span class="spinner"></span>
<?php } elseif ( 'pending' == $post->post_status && $can_publish ) { ?>
<input type="submit" name="save" id="save-post" value="<?php esc_attr_e('Save as Pending'); ?>" class="button" />
<span class="spinner"></span>
<?php } ?>
</div>
<?php if ( is_post_type_viewable( $post_type_object ) ) : ?>
<div id="preview-action">
<?php
$preview_link = esc_url( get_preview_post_link( $post ) );
if ( 'publish' == $post->post_status ) {
$preview_button_text = __( 'Preview Changes' );
} else {
$preview_button_text = __( 'Preview' );
}

$preview_button = sprintf( '%1$s<span class="screen-reader-text"> %2$s</span>',
$preview_button_text,
/* translators: accessibility text */
__( '(opens in a new window)' )
);
?>
<a class="preview button" href="<?php echo $preview_link; ?>" target="wp-preview-<?php echo (int) $post->ID; ?>" id="post-preview"><?php echo $preview_button; ?></a>
<input type="hidden" name="wp-preview" id="wp-preview" value="" />
</div>
<?php endif; // public post type ?>
<?php
/**
* Fires before the post time/date setting in the Publish meta box.
*
* @since 4.4.0
*
* @param WP_Post $post WP_Post object for the current post.
*/
do_action( 'post_submitbox_minor_actions', $post );
?>
<div class="clear"></div>
</div><!-- #minor-publishing-actions -->
<div id="misc-publishing-actions">

<div class="misc-pub-section misc-pub-post-status">
<?php _e( 'Status:' ) ?> <span id="post-status-display"><?php

switch ( $post->post_status ) {
case 'private':
_e('Privately Published');
break;
case 'publish':
_e('Published');
break;
case 'future':
_e('Scheduled');
break;
case 'pending':
_e('Pending Review');
break;
case 'draft':
case 'auto-draft':
_e('Draft');
break;
}
?>
</span>
<?php if ( 'publish' == $post->post_status || 'private' == $post->post_status || $can_publish ) { ?>
<a href="#post_status" <?php if ( 'private' == $post->post_status ) { ?>style="display:none;" <?php } ?>class="edit-post-status hide-if-no-js" role="button"><span aria-hidden="true"><?php _e( 'Edit' ); ?></span> <span class="screen-reader-text"><?php _e( 'Edit status' ); ?></span></a>

<div id="post-status-select" class="hide-if-js">
<input type="hidden" name="hidden_post_status" id="hidden_post_status" value="<?php echo esc_attr( ('auto-draft' == $post->post_status ) ? 'draft' : $post->post_status); ?>" />
<label for="post_status" class="screen-reader-text"><?php _e( 'Set status' ) ?></label>
<select name="post_status" id="post_status">
<?php if ( 'publish' == $post->post_status ) : ?>
<option<?php selected( $post->post_status, 'publish' ); ?> value='publish'><?php _e('Published') ?></option>
<?php /*elseif ( 'private' == $post->post_status ) : ?>
<option<?php selected( $post->post_status, 'private' ); ?> value='publish'><?php _e('Privately Published') ?></option>
<?php elseif ( 'future' == $post->post_status ) : ?>
<option<?php selected( $post->post_status, 'future' ); ?> value='future'><?php _e('Scheduled') ?></option>
<?php */endif; /*?>
<option<?php selected( $post->post_status, 'pending' ); ?> value='pending'><?php _e('Pending Review') ?></option>
<?php if ( 'auto-draft' == $post->post_status ) : ?>
<option<?php selected( $post->post_status, 'auto-draft' ); ?> value='draft'><?php _e('Draft') ?></option>
<?php else : ?>
<option<?php selected( $post->post_status, 'draft' ); ?> value='draft'><?php _e('Draft') ?></option>
<?php endif;*/ ?>
</select>
<a href="#post_status" class="save-post-status hide-if-no-js button"><?php _e('OK'); ?></a>
<a href="#post_status" class="cancel-post-status hide-if-no-js button-cancel"><?php _e('Cancel'); ?></a>
</div>

<?php } ?>
</div><!-- .misc-pub-section -->

<div class="misc-pub-section misc-pub-visibility" id="visibility" style="display:none;">
<?php _e('Visibility:'); ?> <span id="post-visibility-display"><?php

if ( 'private' == $post->post_status ) {
$post->post_password = '';
$visibility = 'private';
$visibility_trans = __('Private');
} elseif ( !empty( $post->post_password ) ) {
$visibility = 'password';
$visibility_trans = __('Password protected');
} elseif ( $post_type == 'post' && is_sticky( $post->ID ) ) {
$visibility = 'public';
$visibility_trans = __('Public, Sticky');
} else {
$visibility = 'public';
$visibility_trans = __('Public');
}

echo esc_html( $visibility_trans ); ?></span>
<?php if ( $can_publish ) { ?>
<a href="#visibility" class="edit-visibility hide-if-no-js" role="button"><span aria-hidden="true"><?php _e( 'Edit' ); ?></span> <span class="screen-reader-text"><?php _e( 'Edit visibility' ); ?></span></a>

<div id="post-visibility-select" class="hide-if-js">
<input type="hidden" name="hidden_post_password" id="hidden-post-password" value="<?php echo esc_attr($post->post_password); ?>" />
<?php if ($post_type == 'post'): ?>
<input type="checkbox" style="display:none" name="hidden_post_sticky" id="hidden-post-sticky" value="sticky" <?php checked(is_sticky($post->ID)); ?> />
<?php endif; ?>
<input type="hidden" name="hidden_post_visibility" id="hidden-post-visibility" value="<?php echo esc_attr( $visibility ); ?>" />
<input type="radio" name="visibility" id="visibility-radio-public" value="public" <?php checked( $visibility, 'public' ); ?> /> <label for="visibility-radio-public" class="selectit"><?php _e('Public'); ?></label><br />
<?php if ( $post_type == 'post' && current_user_can( 'edit_others_posts' ) ) : ?>
<span id="sticky-span"><input id="sticky" name="sticky" type="checkbox" value="sticky" <?php checked( is_sticky( $post->ID ) ); ?> /> <label for="sticky" class="selectit"><?php _e( 'Stick this post to the front page' ); ?></label><br /></span>
<?php endif; ?>
<input type="radio" name="visibility" id="visibility-radio-password" value="password" <?php checked( $visibility, 'password' ); ?> /> <label for="visibility-radio-password" class="selectit"><?php _e('Password protected'); ?></label><br />
<span id="password-span"><label for="post_password"><?php _e('Password:'); ?></label> <input type="text" name="post_password" id="post_password" value="<?php echo esc_attr($post->post_password); ?>"  maxlength="255" /><br /></span>
<input type="radio" name="visibility" id="visibility-radio-private" value="private" <?php checked( $visibility, 'private' ); ?> /> <label for="visibility-radio-private" class="selectit"><?php _e('Private'); ?></label><br />

<p>
<a href="#visibility" class="save-post-visibility hide-if-no-js button"><?php _e('OK'); ?></a>
<a href="#visibility" class="cancel-post-visibility hide-if-no-js button-cancel"><?php _e('Cancel'); ?></a>
</p>
</div>
<?php } ?>

</div><!-- .misc-pub-section -->

<?php
/* translators: Publish box date format, see https://secure.php.net/date */
$datef = __( 'M j, Y @ H:i' );
if ( 0 != $post->ID ) {
if ( 'future' == $post->post_status ) { // scheduled for publishing at a future date
/* translators: Post date information. 1: Date on which the post is currently scheduled to be published */
$stamp = __('Scheduled for: <b>%1$s</b>');
} elseif ( 'publish' == $post->post_status || 'private' == $post->post_status ) { // already published
/* translators: Post date information. 1: Date on which the post was published */
$stamp = __('Published on: <b>%1$s</b>');
} elseif ( '0000-00-00 00:00:00' == $post->post_date_gmt ) { // draft, 1 or more saves, no date specified
$stamp = __('Publish <b>immediately</b>');
} elseif ( time() < strtotime( $post->post_date_gmt . ' +0000' ) ) { // draft, 1 or more saves, future date specified
/* translators: Post date information. 1: Date on which the post is to be published */
$stamp = __('Schedule for: <b>%1$s</b>');
} else { // draft, 1 or more saves, date specified
/* translators: Post date information. 1: Date on which the post is to be published */
$stamp = __('Publish on: <b>%1$s</b>');
}
$date = date_i18n( $datef, strtotime( $post->post_date ) );
} else { // draft (no saves, and thus no date specified)
$stamp = __('Publish <b>immediately</b>');
$date = date_i18n( $datef, strtotime( current_time('mysql') ) );
}

if ( ! empty( $args['args']['revisions_count'] ) ) : ?>
<div class="misc-pub-section misc-pub-revisions">
<?php
/* translators: Post revisions heading. 1: The number of available revisions */
printf( __( 'Revisions: %s' ), '<b>' . number_format_i18n( $args['args']['revisions_count'] ) . '</b>' );
?>
<a class="hide-if-no-js" href="<?php echo esc_url( get_edit_post_link( $args['args']['revision_id'] ) ); ?>"><span aria-hidden="true"><?php _ex( 'Browse', 'revisions' ); ?></span> <span class="screen-reader-text"><?php _e( 'Browse revisions' ); ?></span></a>
</div>
<?php endif;

if ( $can_publish ) : // Contributors don't get to choose the date of publish ?>
<div class="misc-pub-section curtime misc-pub-curtime">
<span id="timestamp">
<?php printf($stamp, $date); ?></span>
<a href="#edit_timestamp" class="edit-timestamp hide-if-no-js" role="button"><span aria-hidden="true"><?php _e( 'Edit' ); ?></span> <span class="screen-reader-text"><?php _e( 'Edit date and time' ); ?></span></a>
<fieldset id="timestampdiv" class="hide-if-js">
<legend class="screen-reader-text"><?php _e( 'Date and time' ); ?></legend>
<?php touch_time( ( $action === 'edit' ), 1 ); ?>
</fieldset>
</div><?php // /misc-pub-section ?>
<?php endif; ?>

<?php
/**
* Fires after the post time/date setting in the Publish meta box.
*
* @since 2.9.0
* @since 4.4.0 Added the `$post` parameter.
*
* @param WP_Post $post WP_Post object for the current post.
*/
do_action( 'post_submitbox_misc_actions', $post );
?>
</div>
<div class="clear"></div>
</div>

<div id="major-publishing-actions">
<?php
/**
* Fires at the beginning of the publishing actions section of the Publish meta box.
*
* @since 2.7.0
*/
do_action( 'post_submitbox_start' );
?>
<div id="delete-action">
<?php
if ( current_user_can( "delete_post", $post->ID ) ) {
if ( !EMPTY_TRASH_DAYS )
$delete_text = __('Delete Permanently');
else
$delete_text = __('Move to Trash');
?>
<a class="submitdelete deletion" href="<?php echo get_delete_post_link($post->ID); ?>"><?php echo $delete_text; ?></a><?php
} ?>
</div>

<div id="publishing-action">
<span class="spinner"></span>
<?php
if ( !in_array( $post->post_status, array('publish', 'future', 'private', 'booked', 'pending', 'complete', 'archived', 'ordered', 'cancel') ) || 0 == $post->ID ) {
if ( $can_publish ) :
if ( !empty($post->post_date_gmt) && time() < strtotime( $post->post_date_gmt . ' +0000' ) ) : ?>
<input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Schedule') ?>" />
<?php submit_button( __( 'Schedule' ), 'primary large', 'publish', false ); ?>
<?php    else : ?>
<input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Publish') ?>" />
<?php submit_button( __( 'Publish' ), 'primary large', 'publish', false ); ?>
<?php    endif;
else : ?>
<input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Submit for Review') ?>" />
<?php submit_button( __( 'Submit for Review' ), 'primary large', 'publish', false ); ?>
<?php
endif;
} else { ?>
<input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Update') ?>" />
<input name="save" type="submit" class="button button-primary button-large" id="publish" value="<?php esc_attr_e( 'Update' ) ?>" />
<?php
} ?>
</div>
<div class="clear"></div>
</div>
</div>

<?php
}

/*  MANAGE META BOX based on status  */

/*  SEND MAIL BASED ON STATUS CHANGE  */
add_action('transition_post_status', 'on_all_status_transitions', 10, 3);
function on_all_status_transitions($new_status, $old_status, $post) {
if ('jobs' === get_post_type()) {

if ($new_status == 'complete') {
send_complete_status_mail($post);
}
if ($new_status == 'booked') {
send_booked_status_mail($post);
}
}
}

/*     function for complete status mail     */
function send_complete_status_mail($post) {
global $wpdb;

$post_id = $post->ID;
$assigned_user_id = get_post_meta($post_id, 'assigned_user_id', true);

$email_table = $wpdb->prefix . "email_preference_job_options";
$get_booked_status_data = $wpdb->get_results("SELECT * from {$email_table} where email_type='completed_job' AND user_id = '".$assigned_user_id."' ", ARRAY_A);

foreach ($get_booked_status_data as $data) {
$user_info1 = get_userdata($data['user_id']);
$job_user_role = $user_info1->roles[0];
$mail_ids = $data['email_id'];

if ($job_user_role != 'administrator') {

$booking_complete = get_field('booking_complete', '353');
$job_id = get_post_meta($post->ID, "job_id", true);
$headers[] = 'From: Bagshaw & Hardy <emailtesterthree@gmail.com>';
add_filter('wp_mail_content_type', create_function('', 'return "text/html"; '));
$mailed = wp_mail($mail_ids, 'Job Completed', $booking_complete, $headers);
}
}
}

/*     function for booked status mail     */
function send_booked_status_mail($post) {
global $wpdb;

$post_id = $post->ID;
$assigned_user_id = get_post_meta($post_id, 'assigned_user_id', true);

$email_table = $wpdb->prefix . "email_preference_job_options";
$get_complete_status_data = $wpdb->get_results("SELECT * from {$email_table} where email_type='book_job' AND user_id = '".$assigned_user_id."'", ARRAY_A);
foreach ($get_complete_status_data as $data) {
$user_info1 = get_userdata($data['user_id']);
$job_user_role = $user_info1->roles[0];
$mail_ids = $data['email_id'];

if ($job_user_role != 'administrator') {
$booking_job = get_field('booked_for_the_job', '353');
$job_id = get_post_meta($post->ID, "job_id", true);
$headers[] = 'From: Bagshaw & Hardy <emailtesterthree@gmail.com>';
add_filter('wp_mail_content_type', create_function('', 'return "text/html"; '));
$mailed = wp_mail($mail_ids, 'Job Booked', $booking_job, $headers);
}
}
}