convertkit / includes / class-convertkit-preview-output.php

class-convertkit-preview-output.php in Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages 2.2.7, at includes/class-convertkit-preview-output.php

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1	<?php
2	/**
3	* ConvertKit Preview Output class.
4	*
5	* @package ConvertKit
6	* @author ConvertKit
7	*/
8
9	/**
10	* Handles:
11	* - previewing a supplied Form ID in the URL when viewing a Page or Post,
12	* when the user clicks a preview link in the Plugin Setup Wizard,
13	* - appending an 'Edit form in ConvertKit' link when previewing a Page or Post
14	* as a user who can edit the Page.
15	*
16	* @package ConvertKit
17	* @author ConvertKit
18	*/
19	class ConvertKit_Preview_Output {
20
21	/**
22	* Registers action and filter hooks.
23	*
24	* @since 1.9.8.5
25	*/
26	public function __construct() {
27
28	add_filter( 'convertkit_output_append_form_to_content_form_id', array( $this, 'preview_form' ), 99999 );
29	add_filter( 'convertkit_block_form_render', array( $this, 'maybe_append_edit_form_link_to_form_block' ), 10, 3 );
30	add_filter( 'convertkit_frontend_append_form', array( $this, 'maybe_append_edit_form_link_to_form' ), 10, 4 );
31
32	}
33
34
35	/**
36	* Changes the form to display for the given Post ID if the request is
37	* from a logged in user who has clicked a preview link in the Plugin Setup Wizard.
38	*
39	* @since 1.9.8.5
40	*
41	* @param int $form_id ConvertKit Form ID.
42	* @return int ConvertKit Form ID
43	*/
44	public function preview_form( $form_id ) {
45
46	// Bail if the user isn't logged in.
47	if ( ! is_user_logged_in() ) {
48	return $form_id;
49	}
50
51	// Bail if no nonce field exists.
52	if ( ! isset( $_REQUEST['convertkit-preview-form-nonce'] ) ) {
53	return $form_id;
54	}
55
56	// Bail if the nonce verification fails.
57	if ( ! wp_verify_nonce( sanitize_key( wp_unslash( $_REQUEST['convertkit-preview-form-nonce'] ) ), 'convertkit-preview-form' ) ) {
58	return $form_id;
59	}
60
61	// Determine the form to preview.
62	$preview_form_id = (int) ( isset( $_REQUEST['convertkit_form_id'] ) ? sanitize_text_field( $_REQUEST['convertkit_form_id'] ) : 0 );
63
64	// Return.
65	return $preview_form_id;
66
67	}
68
69	/**
70	* Returns the URL for the most recent published Post based on the supplied Post Type,
71	* with a preview form nonce included in the URL.
72	*
73	* @since 1.9.8.5
74	*
75	* @param string $post_type Post Type.
76	* @return bool\|string false \| URL
77	*/
78	public function get_preview_form_url( $post_type = 'post' ) {
79
80	// Get most recently published Post/Page ID.
81	$post_id = $this->get_most_recent( $post_type );
82
83	// Bail if no Post/Page exists.
84	if ( ! $post_id ) {
85	return false;
86	}
87
88	// Return preview URL.
89	return add_query_arg(
90	array(
91	'convertkit-preview-form-nonce' => $this->get_preview_form_nonce(),
92	),
93	get_permalink( $post_id )
94	);
95
96	}
97
98	/**
99	* Appends an "Edit form in ConvertKit" link to the given ConvertKit Form block,
100	* if the request is to preview a Page and the logged in WordPress user can
101	* edit the Page.
102	*
103	* @since 2.0.8
104	*
105	* @param string $form_html ConvertKit Form HTML.
106	* @param array $atts ConvertKit Form block attributes.
107	* @param int $form_id ConvertKit Form ID.
108	* @return string
109	*/
110	public function maybe_append_edit_form_link_to_form_block( $form_html, $atts, $form_id ) { // phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter
111
112	return $this->maybe_append_edit_form_link( $form_html, $form_id );
113
114	}
115
116	/**
117	* Appends an "Edit form in ConvertKit" link to the ConvertKit Form defined in
118	* the Page's settings, if the request is to preview a Page and the
119	* logged in WordPress user can edit the Page.
120	*
121	* @since 2.0.8
122	*
123	* @param string $content Post Content, including ConvertKit Form HTML.
124	* @param string $form_html ConvertKit Form HTML.
125	* @param int $post_id Post ID.
126	* @param int $form_id ConvertKit Form ID.
127	*/
128	public function maybe_append_edit_form_link_to_form( $content, $form_html, $post_id, $form_id ) { // phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter
129
130	return $this->maybe_append_edit_form_link( $content, $form_id );
131
132	}
133
134	/**
135	* Appends an "Edit form in ConvertKit" link to the given ConvertKit Form HTML,
136	* if the request is to preview a Page and the logged in WordPress user can
137	* edit the Page.
138	*
139	* @since 2.0.8
140	*
141	* @param string $form_html ConvertKit Form HTML.
142	* @param int $form_id ConvertKit Form ID.
143	* @return string
144	*/
145	private function maybe_append_edit_form_link( $form_html, $form_id ) {
146
147	// Bail if the user isn't logged in.
148	if ( ! is_user_logged_in() ) {
149	return $form_html;
150	}
151
152	// Bail if the request isn't to preview a Page.
153	if ( ! is_preview() ) {
154	return $form_html;
155	}
156
157	// Bail if the user does not have the WordPress capabilities to edit the Page / Post.
158	if ( ! current_user_can( 'edit_post', get_the_ID() ) ) {
159	return $form_html;
160	}
161
162	// Fetch Form.
163	$convertkit_forms = new ConvertKit_Resource_Forms();
164	$form = $convertkit_forms->get_by_id( (int) $form_id );
165
166	// Bail if the Form doesn't exist (this shouldn't happen, but you never know).
167	if ( ! $form ) {
168	return $form_html;
169	}
170
171	// Bail if the Form's format isn't an inline form - we don't want to show an edit link for
172	// e.g. a sticky bar form.
173	// Legacy Forms won't have a format array key.
174	if ( array_key_exists( 'format', $form ) && $form['format'] !== 'inline' ) {
175	return $form_html;
176	}
177
178	// If no format array key is specified, this is a Legacy Form, which has a different edit URL on ConvertKit.
179	if ( ! array_key_exists( 'format', $form ) ) {
180	// Legacy Form.
181	$link = add_query_arg(
182	array(
183	'utm_source' => 'wordpress',
184	'utm_term' => get_locale(),
185	'utm_content' => 'convertkit',
186	),
187	sprintf(
188	'https://app.convertkit.com/landing_pages/%s/edit/',
189	esc_attr( (string) $form_id )
190	)
191	);
192	} else {
193	$link = add_query_arg(
194	array(
195	'utm_source' => 'wordpress',
196	'utm_term' => get_locale(),
197	'utm_content' => 'convertkit',
198	),
199	sprintf(
200	'https://app.convertkit.com/forms/designers/%s/edit/',
201	esc_attr( (string) $form_id )
202	)
203	);
204	}
205
206	// Append a link to edit the Form on ConvertKit.
207	$form_html .= sprintf(
208	'<div style="margin:0;padding:5px;text-align:right;font-size:13px;"><a href="%s" target="_blank">%s</a></div>',
209	esc_url( $link ),
210	esc_html__( 'Edit form in ConvertKit', 'convertkit' )
211	);
212
213	return $form_html;
214
215	}
216
217	/**
218	* Returns the nonce to preview a form on a Page, Post or Custom Post Type.
219	*
220	* @since 1.9.8.5
221	*
222	* @return string Nonce
223	*/
224	private function get_preview_form_nonce() {
225
226	return wp_create_nonce( 'convertkit-preview-form' );
227
228	}
229
230	/**
231	* Returns the most recent published Post ID for the given Post Type.
232	*
233	* @since 1.9.8.5
234	*
235	* @param string $post_type Post Type.
236	* @return false\|int Post ID
237	*/
238	private function get_most_recent( $post_type = 'post' ) {
239
240	// Run query.
241	$query = new WP_Query(
242	array(
243	'post_type' => $post_type,
244	'post_status' => 'publish',
245	'posts_per_page' => 1,
246	'orderby' => 'date',
247	'order' => 'DESC',
248	'fields' => 'ids',
249	)
250	);
251
252	// Return false if no Posts exist for the given type.
253	if ( empty( $query->posts ) ) {
254	return false;
255	}
256
257	// Return the Post ID.
258	return $query->posts[0];
259
260	}
261
262	}
263