charitable / includes / abstracts / abstract-class-charitable-email.php

abstract-class-charitable-email.php in Charitable – Donation & Fundraising Platform (Donation Forms, Recurring Donations & Fundraising Campaigns) 1.8.12.3, at includes/abstracts/abstract-class-charitable-email.php

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1	<?php
2	/**
3	* Email model.
4	*
5	* @package Charitable/Classes/Charitable_Email
6	* @author David Bisset
7	* @copyright Copyright (c) 2023, WP Charitable LLC
8	* @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
9	* @since 1.0.0
10	* @version 1.6.60
11	*/
12
13	// Exit if accessed directly.
14	if ( ! defined( 'ABSPATH' ) ) {
15	exit;
16	}
17
18	if ( ! class_exists( 'Charitable_Email' ) ) :
19
20	/**
21	* Charitable_Email
22	*
23	* @since 1.0.0
24	*/
25	abstract class Charitable_Email implements Charitable_Email_Interface {
26
27	/** Email ID */
28	const ID = '';
29
30	/**
31	* Descriptive name of the email.
32	*
33	* @since 1.0.0
34	*
35	* @var string
36	*/
37	protected $name;
38
39	/**
40	* Array of supported object types (campaigns, donations, donors, etc).
41	*
42	* @since 1.0.0
43	*
44	* @var string[]
45	*/
46	protected $object_types = array();
47
48	/**
49	* Whether the email allows you to define the email recipients.
50	*
51	* @since 1.0.0
52	*
53	* @var boolean
54	*/
55	protected $has_recipient_field = false;
56
57	/**
58	* Whether the email is required.
59	*
60	* @since 1.4.0
61	*
62	* @var boolean
63	*/
64	protected $required = false;
65
66	/**
67	* The Donation object, if relevant.
68	*
69	* @since 1.0.0
70	*
71	* @var Charitable_Donation
72	*/
73	protected $donation;
74
75	/**
76	* The Campaign object, if relevant.
77	*
78	* @since 1.0.0
79	*
80	* @var Charitable_Campaign
81	*/
82	protected $campaign;
83
84	/**
85	* Email recipient.
86	*
87	* @since 1.0.0
88	*
89	* @var string
90	*/
91	protected $recipients;
92
93	/**
94	* Email headers.
95	*
96	* @since 1.0.0
97	*
98	* @var string
99	*/
100	protected $headers;
101
102	/**
103	* Email attachments.
104	*
105	* @since 1.6.59
106	*
107	* @var string
108	*/
109	protected $attachments;
110
111	/**
112	* Create a class instance.
113	*
114	* @since 1.0.0
115	*
116	* @param mixed[] $objects Objects for the email.
117	*/
118	public function __construct( $objects = array() ) {
119	$this->donation = isset( $objects['donation'] ) ? $objects['donation'] : null;
120	$this->campaign = isset( $objects['campaign'] ) ? $objects['campaign'] : null;
121	}
122
123	/**
124	* Return an instance property.
125	*
126	* @since 1.5.0
127	*
128	* @param key $property The property to return.
129	* @return mixed
130	*/
131	public function get( $property ) {
132	if ( property_exists( $this, $property ) ) {
133	return $this->$property;
134	}
135
136	return '';
137	}
138
139	/**
140	* Return the email name.
141	*
142	* @since 1.0.0
143	*
144	* @return string
145	*/
146	public function get_name() {
147	return $this->name;
148	}
149
150	/**
151	* Return whether the email is required.
152	*
153	* If an email is required, it cannot be disabled/enabled, but it can still be edited.
154	*
155	* @since 1.4.0
156	*
157	* @return boolean
158	*/
159	public function is_required() {
160	return $this->required;
161	}
162
163	/**
164	* Return the types of objects.
165	*
166	* @since 1.3.0
167	*
168	* @return string[]
169	*/
170	public function get_object_types() {
171	return $this->object_types;
172	}
173
174	/**
175	* Return the donation object.
176	*
177	* @since 1.3.0
178	*
179	* @return null\|Charitable_Donation
180	*/
181	public function get_donation() {
182	return $this->donation;
183	}
184
185	/**
186	* Return the campaign object.
187	*
188	* @since 1.3.0
189	*
190	* @return null\|Charitable_Campaign
191	*/
192	public function get_campaign() {
193	return $this->campaign;
194	}
195
196	/**
197	* Get from name for email.
198	*
199	* @since 1.0.0
200	*
201	* @return string
202	*/
203	public function get_from_name() {
204	return wp_specialchars_decode( charitable_get_option( 'email_from_name', get_option( 'blogname' ) ) );
205	}
206
207	/**
208	* Get from address for email.
209	*
210	* @since 1.0.0
211	*
212	* @return string
213	*/
214	public function get_from_address() {
215	return charitable_get_option( 'email_from_email', get_option( 'admin_email' ) );
216	}
217
218	/**
219	* Return the email recipients.
220	*
221	* @since 1.0.0
222	* @since 1.8.9.8 Normalize array values to comma-separated string to prevent downstream TypeErrors.
223	*
224	* @return string
225	*/
226	public function get_recipient() {
227	$recipient = $this->get_option( 'recipient', $this->get_default_recipient() );
228	return is_array( $recipient ) ? implode( ', ', $recipient ) : $recipient;
229	}
230
231	/**
232	* Return the email subject line.
233	*
234	* @since 1.0.0
235	*
236	* @return string
237	*/
238	public function get_subject() {
239	/**
240	* Allow the email subject to be filtered.
241	*
242	* @since 1.6.60
243	*
244	* @param string $subject The email subject.
245	* @param \Charitable_Email $email The email object.
246	*/
247	return apply_filters(
248	'charitable_email_subject',
249	$this->get_option( 'subject', $this->get_default_subject() ),
250	$this
251	);
252	}
253
254	/**
255	* Get the email content type
256	*
257	* @since 1.0.0
258	*
259	* @return string
260	*/
261	public function get_content_type() {
262	/**
263	* Filter the content type for the email.
264	*
265	* @since 1.0.0
266	*
267	* @param string $content_type The content type. Defaults to 'text/html'.
268	* @param \Charitable_Email $email This instance of `Charitable_Email`.
269	*/
270	return apply_filters( 'charitable_email_content_type', 'text/html', $this );
271	}
272
273	/**
274	* Get the email headers.
275	*
276	* @since 1.0.0
277	*
278	* @return string
279	*/
280	public function get_headers() {
281	if ( ! isset( $this->headers ) ) {
282	$this->headers = "From: {$this->get_from_name()} <{$this->get_from_address()}>\r\n";
283	$this->headers .= "Reply-To: {$this->get_from_address()}\r\n";
284	$this->headers .= "Content-Type: {$this->get_content_type()}; charset=utf-8\r\n";
285	}
286
287	/**
288	* Filter the email headers.
289	*
290	* @since 1.0.0
291	*
292	* @param string $headers The default email headers.
293	* @param \Charitable_Email $email The email object.
294	*/
295	return apply_filters( 'charitable_email_headers', $this->headers, $this );
296	}
297
298	/**
299	* Get the email attachments.
300	*
301	* @since 1.6.59
302	*
303	* @return array
304	*/
305	public function get_attachments() {
306	if ( ! isset( $this->attachments ) ) {
307	$this->attachments = array();
308	}
309
310	/**
311	* Filter the email attachments.
312	*
313	* @since 1.6.59
314	*
315	* @param array $attachments The default email attachments.
316	* @param \Charitable_Email $email The email object.
317	*/
318	return apply_filters( 'charitable_email_attachments', $this->attachments, $this );
319	}
320
321	/**
322	* Checks whether we are currently previewing the email.
323	*
324	* @since 1.3.5
325	*
326	* @return boolean
327	*/
328	public function is_preview() {
329	return isset( $_GET['charitable_action'] ) && 'preview_email' === $_GET['charitable_action']; // phpcs:ignore WordPress.Security.NonceVerification
330	}
331
332	/**
333	* Register email settings.
334	*
335	* @since 1.0.0
336	* @since 1.5.0 $settings argument is now deprecated.
337	* @since 1.5.7 $settings argument removed from function definition.
338	*
339	* @return array
340	*/
341	public function email_settings() {
342	if ( func_num_args() ) {
343	charitable_get_deprecated()->deprecated_argument(
344	__METHOD__,
345	'1.5.0',
346	__( 'The `$settings` parameter is no longer used.', 'charitable' )
347	);
348	}
349
350	$email_settings = array(
351	'section_email' => array(
352	'type' => 'heading',
353	'title' => $this->get_name(),
354	'priority' => 2,
355	),
356	'subject' => array(
357	'type' => 'text',
358	'title' => __( 'Email Subject Line', 'charitable' ),
359	'help' => __( 'The email subject line when it is delivered to recipients.', 'charitable' ),
360	'priority' => 6,
361	'class' => 'wide',
362	'default' => $this->get_default_subject(),
363	),
364	'headline' => array(
365	'type' => 'text',
366	'title' => __( 'Email Headline', 'charitable' ),
367	'help' => __( 'The headline displayed at the top of the email.', 'charitable' ),
368	'priority' => 10,
369	'class' => 'wide',
370	'default' => $this->get_default_headline(),
371	),
372	'body' => array(
373	'type' => 'editor',
374	'title' => __( 'Email Body', 'charitable' ),
375	'help' => sprintf(
376	'%s <div class="charitable-shortcode-options">%s</div>',
377	__( 'The content of the email that will be delivered to recipients. HTML is accepted.', 'charitable' ),
378	$this->get_shortcode_options()
379	),
380	'priority' => 14,
381	'default' => $this->get_default_body(),
382	),
383	'preview' => array(
384	'type' => 'content',
385	'title' => __( 'Preview', 'charitable' ),
386	'content' => sprintf(
387	'<a href="%s" target="_blank" class="button">%s</a>',
388	esc_url(
389	add_query_arg(
390	array(
391	'charitable_action' => 'preview_email',
392	'email_id' => $this->get_email_id(),
393	),
394	home_url()
395	)
396	),
397	__( 'Preview email', 'charitable' )
398	),
399	'priority' => 18,
400	'save' => false,
401	),
402	);
403
404	// We need to add 'reply_to_donor' to the email settings if it's not already there but only for the new donation email.
405	if ( 'new_donation' === $this->get_email_id() \|\| 'offline_donation_notification' === $this->get_email_id() ) {
406	$email_settings['reply_to_donor'] = array(
407	'type' => 'checkbox',
408	'title' => __( 'Reply To Donor', 'charitable' ),
409	'help' => __( 'If active the recipient will be able to thank the donor by replying to the email.', 'charitable' ),
410	'priority' => 8,
411	'class' => 'wide',
412	'default' => 1,
413	);
414	}
415
416	/* Add the recipients field if applicable to this email. */
417	$email_settings = $this->add_recipients_field( $email_settings );
418
419	/**
420	* Filter the settings available for this email.
421	*
422	* This filter is primarily useful for adding settings to specific email types.
423	* If you only want to add fields to all email types, use this hook instead:
424	*
425	* charitable_settings_fields_emails_email
426	*
427	* @see Charitable_Email_Settings::add_individual_email_fields
428	*
429	* @since 1.0.0
430	*
431	* @param array $email_settings Email settings.
432	*/
433	return apply_filters( 'charitable_settings_fields_emails_email_' . $this->get_email_id(), $email_settings );
434	}
435
436	/**
437	* Add recipient field
438	*
439	* @since 1.0.0
440	*
441	* @param array $settings Existing array of email settings.
442	* @return array
443	*/
444	public function add_recipients_field( $settings = array() ) {
445	if ( ! $this->has_recipient_field ) {
446	return $settings;
447	}
448
449	$settings['recipient'] = array(
450	'type' => 'text',
451	'title' => __( 'Recipients', 'charitable' ),
452	'help' => __( 'A comma-separated list of email address that will receive this email.', 'charitable' ),
453	'priority' => 4,
454	'class' => 'wide',
455	'default' => $this->get_default_recipient(),
456	);
457
458	return $settings;
459	}
460
461	/**
462	* Sends the email.
463	*
464	* @since 1.0.0
465	* @since 1.8.9.2 Added comprehensive error handling for email processing failures.
466	*
467	* @return boolean
468	*/
469	public function send() {
470	// AJAX DEFERRAL: Prevent email HTML from contaminating AJAX JSON response
471	// when Oxygen page builder + Braintree + Recurring donations are active.
472	if ( $this->should_defer_ajax_send() ) {
473	return $this->defer_ajax_send();
474	}
475
476	/**
477	* Do something before sending the email.
478	*
479	* @since 1.0.0
480	*
481	* @param \Charitable_Email $email The email object.
482	*/
483	do_action( 'charitable_before_send_email', $this );
484
485	try {
486	// Safely get each email component with error handling
487	$recipient = $this->safe_get_recipient();
488	if ( false === $recipient ) {
489	return false;
490	}
491
492	$subject = $this->safe_get_subject();
493	if ( false === $subject ) {
494	return false;
495	}
496
497	$body = $this->safe_build_email();
498	if ( false === $body ) {
499	return false;
500	}
501
502	$headers = $this->safe_get_headers();
503	if ( false === $headers ) {
504	return false;
505	}
506
507	$attachments = $this->safe_get_attachments();
508	if ( false === $attachments ) {
509	return false;
510	}
511
512	// Capture the actual error from wp_mail() failures.
513	// WordPress fires 'wp_mail_failed' action with a WP_Error
514	// containing the real SMTP/mailer error message.
515	$wp_mail_error = null;
516	$capture_error = function( $error ) use ( &$wp_mail_error ) {
517	$wp_mail_error = $error;
518	};
519	add_action( 'wp_mail_failed', $capture_error );
520
521	$sent = wp_mail( $recipient, $subject, $body, $headers, $attachments );
522
523	remove_action( 'wp_mail_failed', $capture_error );
524
525	if ( ! $sent ) {
526	$error_detail = 'wp_mail() returned false';
527	if ( $wp_mail_error instanceof \WP_Error ) {
528	$error_detail .= ' — ' . $wp_mail_error->get_error_code() . ': ' . $wp_mail_error->get_error_message();
529	$error_data = $wp_mail_error->get_error_data();
530	if ( ! empty( $error_data ) ) {
531	$error_detail .= ' \| Data: ' . ( is_string( $error_data ) ? $error_data : wp_json_encode( $error_data ) );
532	}
533	}
534	$this->log_email_error( 'wp_mail_failed', $error_detail );
535	}
536
537	} catch ( Throwable $e ) {
538	$this->log_email_error( 'exception_during_send', $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine() );
539	$sent = false;
540	}
541
542	/**
543	* Do something after sending the email.
544	*
545	* @since 1.0.0
546	*
547	* @param \Charitable_Email $email The email object.
548	*/
549	do_action( 'charitable_after_send_email', $this, $sent ?? false );
550
551	return $sent ?? false;
552	}
553
554	/**
555	* Resend an email.
556	*
557	* @since 1.5.0
558	*
559	* @param int $object_id An object ID.
560	* @param array $args Mixed set of arguments.
561	* @return boolean
562	*/
563	public static function resend( $object_id, $args = array() ) {
564	charitable_get_deprecated()->doing_it_wrong(
565	__METHOD__,
566	__( 'A `resend` method has not been defined for this class.', 'charitable' ),
567	'1.5.0'
568	);
569
570	return false;
571	}
572
573	/**
574	* Checks whether an email can be resent.
575	*
576	* @since 1.5.0
577	*
578	* @param int $object_id An object ID.
579	* @param array $args Mixed set of arguments.
580	* @return boolean
581	*/
582	public static function can_be_resent( $object_id, $args = array() ) {
583	charitable_get_deprecated()->doing_it_wrong(
584	__METHOD__,
585	__( 'A `can_be_resent` method has not been defined for this class.', 'charitable' ),
586	'1.5.0'
587	);
588
589	return false;
590	}
591
592	/**
593	* Checks whether the email has already been sent.
594	*
595	* @since 1.3.2
596	* @since 1.5.2 Added the $data_type parameter.
597	*
598	* @param int $object_id The ID of the object related to this email. May be a campaign ID, a donation ID or a user ID.
599	* @param string $data_type Optional. The type of meta we are saving. Defaults to 'post'.
600	* @return boolean
601	*/
602	public function is_sent_already( $object_id, $data_type = 'post' ) {
603	$log = get_metadata( $data_type, $object_id, $this->get_log_key(), true );
604
605	if ( is_array( $log ) ) {
606	foreach ( $log as $time => $sent ) {
607	if ( $sent ) {
608	return true;
609	}
610	}
611	}
612
613	return false;
614	}
615
616	/**
617	* Log that the email was sent.
618	*
619	* @since 1.3.2
620	* @since 1.5.2 Added the $data_type parameter.
621	*
622	* @param int $object_id The ID of the object related to this email. May be a campaign ID, a donation ID, or a user ID.
623	* @param boolean $sent Whether the email was sent.
624	* @param string $data_type Optional. The type of meta we are saving. Defaults to 'post'.
625	* @return void
626	*/
627	public function log( $object_id, $sent, $data_type = 'post' ) {
628	$log = get_metadata( $data_type, $object_id, $this->get_log_key(), true );
629
630	if ( ! $log ) {
631	$log = array();
632	}
633
634	$log[ time() ] = $sent;
635
636	update_metadata( $data_type, $object_id, $this->get_log_key(), $log );
637	}
638
639	/**
640	* Preview the email. This will display a sample email within the browser.
641	*
642	* @since 1.0.0
643	*
644	* @return string
645	*/
646	public function preview() {
647	/**
648	* Do something before building the preview output.
649	*
650	* @since 1.0.0
651	*
652	* @param \Charitable_Email $this Email object.
653	*/
654	do_action( 'charitable_before_preview_email', $this );
655
656	$output = $this->build_email();
657
658	/**
659	* Do something after building the preview output.
660	*
661	* @since 1.5.0
662	*
663	* @param \Charitable_Email $this Email object.
664	*/
665	do_action( 'charitable_after_preview_email', $this );
666
667	return $output;
668	}
669
670	/**
671	* Returns the body content of the email, formatted as HTML.
672	*
673	* @since 1.0.0
674	* @version 1.8.4.3 add wp_kses_post and html_entity_decode.
675	*
676	* @return string
677	*/
678	public function get_body() {
679	$body = $this->get_option( 'body', $this->get_default_body() );
680	$body = do_shortcode( $body );
681	$body = wpautop( $body );
682
683	// Because this addition is applying to all emails potentially, let's add a temp global for any troubleshooting.
684	if ( ! defined( 'CHARITABLE_EMAILS_DISABLE_HTML' ) \|\| ! CHARITABLE_EMAILS_DISABLE_HTML ) {
685	$body = wp_kses_post( $body );
686	$body = html_entity_decode( $body );
687	}
688
689	/**
690	* Filter the email body before it is sent.
691	*
692	* @since 1.0.0
693	*
694	* @param string $body Body content.
695	* @param \Charitable_Email $email Instance of `Charitable_Email`.
696	*/
697	return apply_filters( 'charitable_email_body', $body, $this );
698	}
699
700	/**
701	* Returns the email headline.
702	*
703	* @since 1.0.0
704	*
705	* @return string
706	*/
707	public function get_headline() {
708	$headline = $this->get_option( 'headline', $this->get_default_headline() );
709	$headline = do_shortcode( $headline );
710
711	/**
712	* Filter the email headline.
713	*
714	* @since 1.0.0
715	*
716	* @param string $headline Headline.
717	* @param \Charitable_Email $email Instance of `Charitable_Email`.
718	*/
719	return apply_filters( 'charitable_email_headline', $headline, $this );
720	}
721
722	/**
723	* Return the value of an option specific to this email.
724	*
725	* @since 1.0.0
726	* @since 1.6.59 Access changed to public.
727	*
728	* @param string $key Settings option key.
729	* @param mixed $default Default value to return in case setting is not set.
730	* @return mixed
731	*/
732	public function get_option( $key, $default ) {
733	return charitable_get_option( array( 'emails_' . $this->get_email_id(), $key ), $default );
734	}
735
736	/**
737	* Return an array of email fields that are specifically available
738	* for this email.
739	*
740	* @since 1.5.0
741	*
742	* @return array
743	*/
744	public function email_fields() {
745	return array();
746	}
747
748	/**
749	* Checks whether the email has a valid donation object set.
750	*
751	* @since 1.0.0
752	*
753	* @return boolean
754	*/
755	public function has_valid_donation() {
756	if ( is_null( $this->donation ) \|\| ! is_a( $this->donation, 'Charitable_Donation' ) ) {
757	charitable_get_deprecated()->doing_it_wrong(
758	__METHOD__,
759	__( 'You cannot send this email without a donation!', 'charitable' ),
760	'1.0.0'
761	);
762
763	return false;
764	}
765
766	return true;
767	}
768	/**
769	* Checks whether the email has a valid campaign object set.
770	*
771	* @since 1.0.0
772	*
773	* @return boolean
774	*/
775	public function has_valid_campaign() {
776	if ( is_null( $this->campaign ) \|\| ! is_a( $this->campaign, 'Charitable_Campaign' ) ) {
777	charitable_get_deprecated()->doing_it_wrong(
778	__METHOD__,
779	__( 'You cannot send this email without a campaign!', 'charitable' ),
780	'1.0.0'
781	);
782
783	return false;
784	}
785
786	return true;
787	}
788
789	/**
790	* Build the email.
791	*
792	* @since 1.0.0
793	*
794	* @return string
795	*/
796	protected function build_email() {
797	ob_start();
798
799	charitable_template( 'emails/header.php', array( 'email' => $this ) );
800
801	charitable_template( 'emails/body.php', array( 'email' => $this ) );
802
803	charitable_template( 'emails/footer.php', array( 'email' => $this ) );
804
805	$message = ob_get_clean();
806
807	/**
808	* Filter the email message before it is sent.
809	*
810	* @since 1.0.0
811	*
812	* @param string $message The full email message output (header, body and footer).
813	* @param \Charitable_Email $email Instance of `Charitable_Email`.
814	*/
815	return apply_filters( 'charitable_email_message', $message, $this );
816	}
817
818	/**
819	* Return the meta key used for the log.
820	*
821	* @since 1.3.2
822	*
823	* @return string
824	*/
825	protected function get_log_key() {
826	return '_email_' . $this->get_email_id() . '_log';
827	}
828
829	/**
830	* Return the default recipient for the email.
831	*
832	* @since 1.0.0
833	*
834	* @return string
835	*/
836	protected function get_default_recipient() {
837	return '';
838	}
839
840	/**
841	* Return the default subject line for the email.
842	*
843	* @since 1.0.0
844	*
845	* @return string
846	*/
847	protected function get_default_subject() {
848	return '';
849	}
850
851	/**
852	* Return the default headline for the email.
853	*
854	* @since 1.0.0
855	*
856	* @return string
857	*/
858	protected function get_default_headline() {
859	return '';
860	}
861
862	/**
863	* Return the default body for the email.
864	*
865	* @since 1.0.0
866	*
867	* @return string
868	*/
869	protected function get_default_body() {
870	return '';
871	}
872
873	/**
874	* Return HTML formatted list of shortcode options that can be used within the body, headline and subject line.
875	*
876	* @since version
877	* @version 1.8.9.1
878	*
879	* @return string
880	*/
881	protected function get_shortcode_options() {
882	$fields = new Charitable_Email_Fields( $this );
883	ob_start();
884	?>
885	<p><?php esc_html_e( 'The following options are available with the <code>[charitable_email]</code> shortcode:', 'charitable' ); ?></p>
886	<ul>
887	<?php foreach ( $fields->get_fields() as $key => $field ) : ?>
888	<li><strong><?php echo wp_kses_post( $field['description'] ); ?></strong>: [charitable_email show=<?php echo esc_html( $key ); ?>]</li>
889	<?php endforeach; ?>
890	</ul>
891
892	<?php
893	$html = ob_get_clean();
894
895	/**
896	* Filter the shortcode options block.
897	*
898	* @since 1.0.0
899	*
900	* @param string $html The content.
901	* @param \Charitable_Email $email This instance of `Charitable_Email`.
902	*/
903	return apply_filters( 'charitable_email_shortcode_options_text', $html, $this );
904	}
905
906	/**
907	* This function is deprecated as of 1.5.0. Checks whether the passed email is the
908	* same as the current email object.
909	*
910	* @deprecated 1.8.0
911	*
912	* @since 1.3.2
913	* @since 1.5.0 Deprecated. No notice added to allow extensions to be updated first.
914	*
915	* @param \Charitable_Email $email Email object.
916	* @return boolean
917	*/
918	protected function is_current_email( Charitable_Email $email ) {
919	return $email->get_email_id() == $this->get_email_id();
920	}
921
922	/**
923	* Add donation content fields.
924	*
925	* @deprecated 1.8.0
926	*
927	* @since 1.0.0
928	* @since 1.5.0 Deprecated.
929	*
930	* @param array $fields Shortcode fields.
931	* @param Charitable_Email $email Instance of `Charitable_Email`.
932	* @return array[]
933	*/
934	public function add_donation_content_fields( $fields, Charitable_Email $email ) {
935	return $fields;
936	}
937
938	/**
939	* Add donation preview fields.
940	*
941	* @deprecated 1.8.0
942	*
943	* @since 1.0.0
944	* @since 1.5.0 Deprecated.
945	*
946	* @param array $fields Shortcode fields.
947	* @param Charitable_Email $email Instance of `Charitable_Email`.
948	* @return array[]
949	*/
950	public function add_preview_donation_content_fields( $fields, Charitable_Email $email ) {
951	return $fields;
952	}
953
954	/**
955	* Add campaign content fields.
956	*
957	* @deprecated 1.8.0
958	*
959	* @since 1.0.0
960	* @since 1.5.0 Deprecated.
961	*
962	* @param array $fields Shortcode fields.
963	* @param Charitable_Email $email Instance of `Charitable_Email`.
964	* @return array[]
965	*/
966	public function add_campaign_content_fields( $fields, Charitable_Email $email ) {
967	return $fields;
968	}
969
970	/**
971	* Add campaign preview fields.
972	*
973	* @deprecated 1.8.0
974	*
975	* @since 1.0.0
976	* @since 1.5.0 Deprecated.
977	*
978	* @param array $fields Shortcode fields.
979	* @param Charitable_Email $email Instance of `Charitable_Email`.
980	* @return array[]
981	*/
982	public function add_preview_campaign_content_fields( $fields, Charitable_Email $email ) {
983	return $fields;
984	}
985
986	/**
987	* Safely get email recipient with error handling.
988	*
989	* @since 1.8.9.2
990	* @since 1.8.9.5 Enhanced with detailed diagnostic context for recipient extraction failures.
991	* @since 1.8.9.8 Normalize array recipients from child class overrides before validation.
992	*
993	* @return string\|false Email recipient or false on error.
994	*/
995	private function safe_get_recipient() {
996	try {
997	$recipient = $this->get_recipient();
998
999	// Normalize array recipients (e.g. from child class overrides or filters) to comma-separated string.
1000	if ( is_array( $recipient ) ) {
1001	$recipient = implode( ', ', array_filter( array_map( 'trim', $recipient ) ) );
1002	}
1003
1004	if ( empty( $recipient ) \|\| ! $this->is_valid_recipient( $recipient ) ) {
1005	// Phase 1: Enhanced diagnostics - minimal overhead, only on errors
1006	$diagnostic_context = array(
1007	'recipient_value' => $recipient,
1008	'recipient_type' => gettype( $recipient ),
1009	'recipient_length' => is_string( $recipient ) ? strlen( $recipient ) : 0,
1010	);
1011
1012	// Add donation context if available (safe checks)
1013	if ( is_object( $this->donation ) && method_exists( $this->donation, 'get_donor_id' ) ) {
1014	$donor_id = $this->donation->get_donor_id();
1015	$diagnostic_context['donation_id'] = method_exists( $this->donation, 'get_donation_id' ) ? $this->donation->get_donation_id() : 'unknown';
1016	$diagnostic_context['donor_id'] = $donor_id;
1017	$diagnostic_context['donor_id_type'] = gettype( $donor_id );
1018
1019	// Check campaign donations count (common failure point)
1020	if ( method_exists( $this->donation, 'get_campaign_donations' ) ) {
1021	$campaign_donations = $this->donation->get_campaign_donations();
1022	$diagnostic_context['campaign_donations_count'] = is_array( $campaign_donations ) ? count( $campaign_donations ) : 'not_array';
1023	}
1024
1025	// Check donor object validity if donor_id exists
1026	if ( ! empty( $donor_id ) && $donor_id !== false && method_exists( $this->donation, 'get_donor' ) ) {
1027	$donor = $this->donation->get_donor();
1028	$diagnostic_context['donor_object_type'] = gettype( $donor );
1029	$diagnostic_context['donor_object_class'] = is_object( $donor ) ? get_class( $donor ) : 'not_object';
1030	}
1031	} else {
1032	$diagnostic_context['donation_object_type'] = gettype( $this->donation );
1033	}
1034
1035	$this->log_email_error( 'invalid_recipient',
1036	'Recipient email is empty or invalid - Enhanced diagnosis: ' . wp_json_encode( $diagnostic_context ) );
1037	return false;
1038	}
1039
1040	return $recipient;
1041
1042	} catch ( Throwable $e ) {
1043	$this->log_email_error( 'recipient_error', $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine() );
1044	return false;
1045	}
1046	}
1047
1048	/**
1049	* Safely get email subject with error handling.
1050	*
1051	* @since 1.8.9.2
1052	*
1053	* @return string\|false Email subject or false on error.
1054	*/
1055	private function safe_get_subject() {
1056	try {
1057	// Capture any errors during shortcode processing
1058	$original_handler = null;
1059	if ( function_exists( 'set_error_handler' ) ) {
1060	$original_handler = set_error_handler( function( $severity, $message, $file, $line ) {
1061	// Skip deprecation warnings - they are not real errors (PHP 8.2+)
1062	if ( $severity === E_DEPRECATED \|\| $severity === E_USER_DEPRECATED ) {
1063	return false;
1064	}
1065	// Skip warnings and notices - common in WordPress plugins (WPML, etc.)
1066	// and should not prevent email delivery.
1067	if ( $severity === E_WARNING \|\| $severity === E_NOTICE \|\| $severity === E_USER_WARNING \|\| $severity === E_USER_NOTICE \|\| $severity === E_STRICT ) {
1068	return false;
1069	}
1070	// Only convert actual user errors to exceptions
1071	throw new ErrorException( $message, 0, $severity, $file, $line );
1072	} );
1073	}
1074
1075	$subject = do_shortcode( $this->get_subject() );
1076
1077	if ( $original_handler !== null ) {
1078	restore_error_handler();
1079	}
1080
1081	return $subject;
1082
1083	} catch ( Throwable $e ) {
1084	if ( isset( $original_handler ) && $original_handler !== null ) {
1085	restore_error_handler();
1086	}
1087	$this->log_email_error( 'subject_error', $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine() );
1088	return false;
1089	}
1090	}
1091
1092	/**
1093	* Safely build email body with error handling.
1094	*
1095	* @since 1.8.9.2
1096	* @since 1.8.9.5 Enhanced with detailed diagnostic context for email build failures.
1097	*
1098	* @return string\|false Email body or false on error.
1099	*/
1100	private function safe_build_email() {
1101	try {
1102	// Set up error handler to catch fatal errors during email building
1103	$original_handler = null;
1104	if ( function_exists( 'set_error_handler' ) ) {
1105	$original_handler = set_error_handler( function( $severity, $message, $file, $line ) {
1106	// Skip deprecation warnings - they are not real errors (PHP 8.2+)
1107	if ( $severity === E_DEPRECATED \|\| $severity === E_USER_DEPRECATED ) {
1108	return false;
1109	}
1110	// Skip warnings and notices - common in WordPress plugins (WPML, etc.)
1111	// and should not prevent email delivery.
1112	if ( $severity === E_WARNING \|\| $severity === E_NOTICE \|\| $severity === E_USER_WARNING \|\| $severity === E_USER_NOTICE \|\| $severity === E_STRICT ) {
1113	return false;
1114	}
1115	// Only convert actual user errors to exceptions
1116	throw new ErrorException( $message, 0, $severity, $file, $line );
1117	} );
1118	}
1119
1120	$body = $this->build_email();
1121
1122	if ( $original_handler !== null ) {
1123	restore_error_handler();
1124	}
1125
1126	return $body;
1127
1128	} catch ( Throwable $e ) {
1129	if ( isset( $original_handler ) && $original_handler !== null ) {
1130	restore_error_handler();
1131	}
1132
1133	// Phase 1: Enhanced email build diagnostics
1134	$build_context = array(
1135	'email_class' => get_class( $this ),
1136	'email_id' => method_exists( $this, 'get_email_id' ) ? $this->get_email_id() : 'unknown',
1137	'error_message' => $e->getMessage(),
1138	'error_file' => basename( $e->getFile() ),
1139	'error_line' => $e->getLine(),
1140	'ob_level' => ob_get_level()
1141	);
1142
1143	// Add donation context for template building
1144	if ( is_object( $this->donation ) ) {
1145	$build_context['has_donation_data'] = true;
1146	$build_context['donation_id'] = method_exists( $this->donation, 'get_donation_id' ) ? $this->donation->get_donation_id() : 'unknown';
1147	} else {
1148	$build_context['has_donation_data'] = false;
1149	}
1150
1151	// Check template availability
1152	$template_dir = CHARITABLE_DIRECTORY_PATH . 'templates/emails/';
1153	$build_context['templates_exist'] = array(
1154	'header' => file_exists( $template_dir . 'header.php' ),
1155	'body' => file_exists( $template_dir . 'body.php' ),
1156	'footer' => file_exists( $template_dir . 'footer.php' )
1157	);
1158
1159	$this->log_email_error( 'email_build_failed',
1160	'Email template build failed - Enhanced diagnosis: ' . wp_json_encode( $build_context ) );
1161	return false;
1162	}
1163	}
1164
1165	/**
1166	* Safely get email headers with error handling.
1167	*
1168	* @since 1.8.9.2
1169	*
1170	* @return string\|array\|false Email headers or false on error.
1171	*/
1172	private function safe_get_headers() {
1173	try {
1174	return $this->get_headers();
1175	} catch ( Throwable $e ) {
1176	$this->log_email_error( 'headers_error', $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine() );
1177	return false;
1178	}
1179	}
1180
1181	/**
1182	* Safely get email attachments with error handling.
1183	*
1184	* @since 1.8.9.2
1185	*
1186	* @return array\|false Email attachments or false on error.
1187	*/
1188	private function safe_get_attachments() {
1189	try {
1190	$attachments = $this->get_attachments();
1191	return is_array( $attachments ) ? $attachments : array();
1192	} catch ( Throwable $e ) {
1193	$this->log_email_error( 'attachments_error', $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine() );
1194	return false;
1195	}
1196	}
1197
1198	/**
1199	* Log email processing errors using the existing donation form error logging system.
1200	*
1201	* @since 1.8.9.2
1202	*
1203	* @param string $error_details Specific error details or code.
1204	* @param string $error_message The error message with context.
1205	* @return int\|false The activity ID on success, false on failure.
1206	*/
1207	private function log_email_error( $error_details, $error_message ) {
1208	// Only log if the function exists (defensive coding)
1209	if ( ! function_exists( 'charitable_log_form_error' ) ) {
1210	return false;
1211	}
1212
1213	// Prepare context with email and donation details
1214	$context = array(
1215	'error_message' => $error_message,
1216	'email_class' => get_class( $this ),
1217	);
1218
1219	// Add donation context if available
1220	if ( isset( $this->donation ) && is_object( $this->donation ) ) {
1221	$context['donation_id'] = method_exists( $this->donation, 'get_donation_id' ) ? $this->donation->get_donation_id() : null;
1222	$context['campaign_id'] = method_exists( $this->donation, 'get_campaign_id' ) ? $this->donation->get_campaign_id() : null;
1223	$context['donor_id'] = method_exists( $this->donation, 'get_donor_id' ) ? $this->donation->get_donor_id() : null;
1224	$context['amount'] = method_exists( $this->donation, 'get_total_donation_amount' ) ? $this->donation->get_total_donation_amount() : null;
1225	}
1226
1227	// Try to get recipient for context (safely) — normalize to string in case a subclass or filter returns an array.
1228	try {
1229	if ( method_exists( $this, 'get_recipient' ) ) {
1230	$raw_recipient = $this->get_recipient();
1231	$context['recipient'] = is_array( $raw_recipient ) ? implode( ', ', $raw_recipient ) : $raw_recipient;
1232	}
1233	} catch ( Throwable $e ) {
1234	// Ignore if we can't get recipient
1235	}
1236
1237	// Log using the existing error logging system
1238	return charitable_log_form_error( 'email_failure', $error_details, $context );
1239	}
1240
1241	/**
1242	* Check if recipient string is valid (handles single emails, comma-separated lists, and arrays).
1243	*
1244	* @since 1.8.9.5
1245	* @since 1.8.9.8 Handle array recipients explicitly to prevent TypeError on PHP 8+.
1246	*
1247	* @param string\|array $recipient The recipient string or array to validate.
1248	* @return boolean True if valid, false otherwise.
1249	*/
1250	private function is_valid_recipient( $recipient ) {
1251	if ( empty( $recipient ) ) {
1252	return false;
1253	}
1254
1255	// Handle array recipients gracefully.
1256	if ( is_array( $recipient ) ) {
1257	foreach ( $recipient as $email ) {
1258	if ( empty( $email ) \|\| ! is_email( trim( $email ) ) ) {
1259	return false;
1260	}
1261	}
1262	return true;
1263	}
1264
1265	// If it's a single email, use is_email()
1266	if ( strpos( $recipient, ',' ) === false ) {
1267	return is_email( trim( $recipient ) );
1268	}
1269
1270	// Handle comma-separated emails
1271	$emails = explode( ',', $recipient );
1272	foreach ( $emails as $email ) {
1273	$email = trim( $email );
1274	if ( empty( $email ) \|\| ! is_email( $email ) ) {
1275	return false;
1276	}
1277	}
1278
1279	return true;
1280	}
1281	/**
1282	* Check if the current email should be deferred to avoid AJAX response contamination.
1283	*
1284	* Only defers when ALL of these conditions are true:
1285	* - Running in AJAX context
1286	* - Processing a donation form submission
1287	* - Using Braintree gateway
1288	* - Processing a recurring donation
1289	* - Oxygen page builder is active (CT_VERSION defined)
1290	*
1291	* @since 1.8.9.6
1292	*
1293	* @return boolean
1294	*/
1295	private function should_defer_ajax_send() {
1296	if ( ! ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
1297	return false;
1298	}
1299
1300	if ( ! isset( $_POST['action'] ) \|\| 'make_donation' !== $_POST['action'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
1301	return false;
1302	}
1303
1304	if ( ! isset( $_POST['gateway'] ) \|\| 'braintree' !== $_POST['gateway'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
1305	return false;
1306	}
1307
1308	if ( ! isset( $_POST['recurring_donation'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
1309	return false;
1310	}
1311
1312	if ( ! defined( 'CT_VERSION' ) ) {
1313	return false;
1314	}
1315
1316	return true;
1317	}
1318
1319	/**
1320	* Defer email sending via WordPress cron to avoid AJAX contamination.
1321	*
1322	* @since 1.8.9.6
1323	*
1324	* @return boolean True if successfully scheduled.
1325	*/
1326	private function defer_ajax_send() {
1327	$email_data = array(
1328	'class' => get_class( $this ),
1329	'args' => $this->get_email_args_for_deferral(),
1330	'timestamp' => time(),
1331	);
1332
1333	wp_schedule_single_event( time() + 5, 'charitable_send_deferred_email', array( $email_data ) );
1334
1335	return true;
1336	}
1337
1338	/**
1339	* Get email constructor args for deferred sending.
1340	*
1341	* @since 1.8.9.6
1342	*
1343	* @return array
1344	*/
1345	private function get_email_args_for_deferral() {
1346	$args = array();
1347
1348	if ( isset( $this->donation ) && is_object( $this->donation ) ) {
1349	if ( method_exists( $this->donation, 'get_donation_id' ) ) {
1350	$args['donation_id'] = $this->donation->get_donation_id();
1351	} elseif ( isset( $this->donation->ID ) ) {
1352	$args['donation_id'] = $this->donation->ID;
1353	}
1354	}
1355
1356	if ( isset( $this->campaign ) && is_object( $this->campaign ) ) {
1357	if ( method_exists( $this->campaign, 'get_campaign_id' ) ) {
1358	$args['campaign_id'] = $this->campaign->get_campaign_id();
1359	} elseif ( isset( $this->campaign->ID ) ) {
1360	$args['campaign_id'] = $this->campaign->ID;
1361	}
1362	}
1363
1364	return $args;
1365	}
1366	}
1367
1368	endif;
1369