ablocks / includes / classes / design-audit.php

design-audit.php in aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder 2.13.0, at includes/classes/design-audit.php

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1	<?php
2	namespace ABlocks\Classes;
3
4	if ( ! defined( 'ABSPATH' ) ) {
5	exit;
6	}
7
8	/**
9	* Finds blocks that carry a hand-picked colour or typography value instead of a
10	* reference to the site's global presets.
11	*
12	* The design system lock (Settings → Editor Options) stops new ones from being
13	* created, but deliberately leaves saved content alone so switching it on cannot
14	* restyle a live site. This is the other half: a list of what is already there,
15	* so a team can clean it up on purpose.
16	*
17	* @package ABlocks
18	*/
19	class DesignAudit {
20
21	/**
22	* A typography attribute always carries these keys, whatever the block calls it.
23	*/
24	const TYPOGRAPHY_MARKERS = [ 'fontFamily', 'fontSizeUnit' ];
25
26	/**
27	* Keys inside a typography object that only ever hold a unit, never a choice.
28	*/
29	const UNIT_SUFFIX = 'Unit';
30
31	/**
32	* Walk parsed blocks and collect the attribute names holding custom values.
33	*
34	* @param array $blocks Parsed blocks (from parse_blocks()).
35	* @param array $found Accumulator: [ 'typography' => [...], 'colors' => [...] ].
36	* @return array
37	*/
38	public static function scan_blocks( $blocks, $found = null ) {
39	if ( null === $found ) {
40	$found = [
41	// A hand-picked typeface — what the default lock prevents.
42	'families' => [],
43	// Other custom typography (size, spacing, weight). Allowed unless
44	// the strict lock is on, so reported separately.
45	'typography' => [],
46	'colors' => [],
47	];
48	}
49
50	if ( ! is_array( $blocks ) ) {
51	return $found;
52	}
53
54	foreach ( $blocks as $block ) {
55	if ( empty( $block['blockName'] ) ) {
56	continue;
57	}
58
59	if ( 0 === strpos( $block['blockName'], 'ablocks/' ) && ! empty( $block['attrs'] ) ) {
60	$found = self::scan_attributes( $block['attrs'], $found );
61	}
62
63	if ( ! empty( $block['innerBlocks'] ) ) {
64	$found = self::scan_blocks( $block['innerBlocks'], $found );
65	}
66	}
67
68	return $found;
69	}
70
71	/**
72	* Inspect one block's attributes.
73	*
74	* Attributes are checked at the top level rather than recursively, because the
75	* "is this compliant?" test needs the sibling `<name>Global` attribute — a
76	* typography object is only a violation when nothing global is referenced.
77	*
78	* @param array $attrs Block attributes.
79	* @param array $found Accumulator.
80	* @return array
81	*/
82	protected static function scan_attributes( $attrs, $found ) {
83	foreach ( $attrs as $name => $value ) {
84	// The global reference itself is never a violation.
85	if ( self::ends_with( $name, 'Global' ) ) {
86	continue;
87	}
88
89	$has_global = ! empty( $attrs[ $name . 'Global' ] );
90
91	if ( self::is_typography( $value ) ) {
92	if ( $has_global ) {
93	continue;
94	}
95	if ( ! empty( $value['fontFamily'] ) && 'Default' !== $value['fontFamily'] ) {
96	$found['families'][] = $name;
97	} elseif ( self::has_custom_typography( $value ) ) {
98	$found['typography'][] = $name;
99	}
100	continue;
101	}
102
103	if ( ! $has_global && self::is_custom_color( $value ) ) {
104	$found['colors'][] = $name;
105	}
106	}
107
108	return $found;
109	}
110
111	/**
112	* Whether an attribute value is a typography object.
113	*
114	* @param mixed $value Attribute value.
115	* @return bool
116	*/
117	public static function is_typography( $value ) {
118	if ( ! is_array( $value ) ) {
119	return false;
120	}
121	foreach ( self::TYPOGRAPHY_MARKERS as $marker ) {
122	if ( ! array_key_exists( $marker, $value ) ) {
123	return false;
124	}
125	}
126	return true;
127	}
128
129	/**
130	* Whether a typography object holds anything an author actually chose.
131	*
132	* Unit keys default to 'px' whether or not anyone touched the control, so they
133	* would report every block on the site as a violation.
134	*
135	* @param array $value Typography attribute value.
136	* @return bool
137	*/
138	public static function has_custom_typography( $value ) {
139	foreach ( $value as $key => $entry ) {
140	if ( self::ends_with( $key, self::UNIT_SUFFIX )
141	\|\| self::ends_with( $key, self::UNIT_SUFFIX . 'Tablet' )
142	\|\| self::ends_with( $key, self::UNIT_SUFFIX . 'Mobile' ) ) {
143	continue;
144	}
145	if ( '' !== $entry && null !== $entry && 'Default' !== $entry ) {
146	return true;
147	}
148	}
149	return false;
150	}
151
152	/**
153	* Whether a value is a literal colour rather than a preset reference.
154	*
155	* Global colours are stored as `var:global\|color\|<id>` and theme presets as
156	* `var:preset\|color\|<slug>`; both stay inside a design system.
157	*
158	* @param mixed $value Attribute value.
159	* @return bool
160	*/
161	public static function is_custom_color( $value ) {
162	if ( ! is_string( $value ) ) {
163	return false;
164	}
165	$value = trim( $value );
166	if ( '' === $value \|\| 0 === strpos( $value, 'var:' ) \|\| 0 === strpos( $value, 'var(' ) ) {
167	return false;
168	}
169	return (bool) preg_match( '/^(#\|rgba?\(\|hsla?\(\|(linear\|radial\|conic)-gradient\()/i', $value );
170	}
171
172	/**
173	* str_ends_with(), which is PHP 8 only and this plugin supports 7.4.
174	*
175	* @param string $haystack Subject.
176	* @param string $needle Suffix.
177	* @return bool
178	*/
179	protected static function ends_with( $haystack, $needle ) {
180	$length = strlen( $needle );
181	return 0 !== $length && substr( $haystack, -$length ) === $needle;
182	}
183	}
184