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<?php |
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|
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declare(strict_types=1); |
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|
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namespace Yatra\Utils; |
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|
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/** |
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* Frontend brand color → CSS custom properties for Yatra trip/booking/listing UI. |
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*/ |
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final class FrontendThemeCss |
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{ |
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public const DEFAULT_PRIMARY = '#3b82f6'; |
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|
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/** |
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* @param mixed $value |
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*/ |
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public static function sanitizePrimaryColor($value): string |
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{ |
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if (!is_string($value)) { |
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return self::DEFAULT_PRIMARY; |
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} |
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$s = trim($value); |
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if ($s === '') { |
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return self::DEFAULT_PRIMARY; |
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} |
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if ($s[0] !== '#') { |
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$s = '#' . $s; |
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} |
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if (!preg_match('/^#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/', $s)) { |
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return self::DEFAULT_PRIMARY; |
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} |
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if (strlen($s) === 4) { |
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$s = '#' . $s[1] . $s[1] . $s[2] . $s[2] . $s[3] . $s[3]; |
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} |
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|
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return strtolower($s); |
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} |
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|
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/** |
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* Inline :root rules to override bundled defaults. Safe to print inside <style> / wp_add_inline_style. |
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*/ |
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public static function buildInlineRootCss(string $primaryHex): string |
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{ |
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$primary = self::sanitizePrimaryColor($primaryHex); |
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$dark = self::mix($primary, '#000000', 0.14); |
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$darker = self::mix($primary, '#000000', 0.32); |
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$light = self::mix($primary, '#ffffff', 0.28); |
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$softBg = self::mix($primary, '#ffffff', 0.92); |
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$darkModeSurface = self::mix($primary, '#000000', 0.72); |
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$darkModeAccent = self::mix($primary, '#ffffff', 0.22); |
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|
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$primaryE = esc_attr($primary); |
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$darkE = esc_attr($dark); |
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$darkerE = esc_attr($darker); |
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$lightE = esc_attr($light); |
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$softE = esc_attr($softBg); |
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$dmSurfE = esc_attr($darkModeSurface); |
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$dmAccE = esc_attr($darkModeAccent); |
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|
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return ':root{' |
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. '--yatra-primary:' . $primaryE . ';' |
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. '--yatra-primary-dark:' . $darkE . ';' |
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. '--yatra-primary-light:' . $lightE . ';' |
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. '--yatra-primary-color:' . $primaryE . ';' |
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. '--yatra-primary-light-soft:' . $softE . ';' |
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. '--yatra-primary-color-dark:' . $dmAccE . ';' |
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. '--yatra-primary-light-dark:' . $dmSurfE . ';' |
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. '--yatra-primary-darker:' . $darkerE . ';' |
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. '}'; |
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} |
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|
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/** |
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* @return array{r:int,g:int,b:int}|null |
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*/ |
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private static function hexToRgb(string $hex): ?array |
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{ |
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if (strlen($hex) !== 7 || $hex[0] !== '#') { |
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return null; |
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} |
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$r = hexdec(substr($hex, 1, 2)); |
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$g = hexdec(substr($hex, 3, 2)); |
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$b = hexdec(substr($hex, 5, 2)); |
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|
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return ['r' => $r, 'g' => $g, 'b' => $b]; |
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} |
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|
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private static function mix(string $fromHex, string $towardHex, float $ratio): string |
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{ |
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$ratio = max(0.0, min(1.0, $ratio)); |
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$a = self::hexToRgb(self::sanitizePrimaryColor($fromHex)); |
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$b = self::hexToRgb(self::sanitizePrimaryColor($towardHex)); |
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if ($a === null || $b === null) { |
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return self::DEFAULT_PRIMARY; |
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} |
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$r = (int) round($a['r'] * (1 - $ratio) + $b['r'] * $ratio); |
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$g = (int) round($a['g'] * (1 - $ratio) + $b['g'] * $ratio); |
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$bb = (int) round($a['b'] * (1 - $ratio) + $b['b'] * $ratio); |
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|
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return sprintf('#%02x%02x%02x', max(0, min(255, $r)), max(0, min(255, $g)), max(0, min(255, $bb))); |
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} |
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|
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/** |
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* Max content width from block theme (theme.json) or $content_width, for --yatra-container-max-width. |
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* |
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* @return non-falsy-string|null Safe CSS length (e.g. 1200px, 40rem) or null to keep bundled default. |
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*/ |
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public static function resolveThemeContainerMaxWidth(): ?string |
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{ |
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$filtered = apply_filters('yatra_container_max_width', null); |
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if (is_string($filtered)) { |
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$t = trim($filtered); |
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if ($t !== '' && self::isSafeCssLengthToken($t)) { |
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if (preg_match('/^\d+$/', $t)) { |
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return (int) $t . 'px'; |
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} |
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|
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return $t; |
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} |
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} |
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|
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if (function_exists('wp_get_global_settings')) { |
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$settings = wp_get_global_settings(); |
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$layout = is_array($settings['layout'] ?? null) ? $settings['layout'] : []; |
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$wide = isset($layout['wideSize']) && is_string($layout['wideSize']) ? trim($layout['wideSize']) : ''; |
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if ($wide !== '' && self::isSafeCssLengthToken($wide)) { |
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return $wide; |
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} |
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$content = isset($layout['contentSize']) && is_string($layout['contentSize']) ? trim($layout['contentSize']) : ''; |
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if ($content !== '' && self::isSafeCssLengthToken($content)) { |
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return $content; |
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} |
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} |
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|
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global $content_width; |
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if (is_int($content_width) || is_float($content_width)) { |
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$w = (int) round((float) $content_width); |
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if ($w > 0 && $w <= 3840) { |
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return $w . 'px'; |
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} |
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} |
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if (is_string($content_width)) { |
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$cw = trim($content_width); |
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if ($cw !== '' && self::isSafeCssLengthToken($cw)) { |
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return $cw; |
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} |
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if ($cw !== '' && ctype_digit($cw)) { |
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$w = (int) $cw; |
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if ($w > 0 && $w <= 3840) { |
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return $w . 'px'; |
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} |
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} |
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} |
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|
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return null; |
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} |
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|
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/** |
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* Sanitize Design → container max width (stored setting). Empty string = use theme / filter resolution. |
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*/ |
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public static function sanitizeContainerMaxWidthSetting($value): string |
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{ |
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if (!is_string($value)) { |
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return ''; |
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} |
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$t = trim($value); |
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if ($t === '') { |
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return ''; |
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} |
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if (preg_match('/^\d+$/', $t)) { |
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$w = (int) $t; |
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if ($w > 0 && $w <= 3840) { |
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return $w . 'px'; |
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} |
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|
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return ''; |
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} |
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if (self::isSafeCssLengthToken($t)) { |
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return $t; |
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} |
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|
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return ''; |
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} |
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|
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/** |
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* @param non-falsy-string $value |
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*/ |
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private static function isSafeCssLengthToken(string $value): bool |
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{ |
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if (strlen($value) > 96) { |
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return false; |
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} |
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if (preg_match('/[<>{}\';\\\\]|\/\*/', $value)) { |
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return false; |
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} |
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if (preg_match('/^\d+$/', $value)) { |
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$w = (int) $value; |
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|
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return $w > 0 && $w <= 3840; |
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} |
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|
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return (bool) preg_match( |
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'/^(?:clamp\([^)]+\)|min\([^)]+\)|max\([^)]+\)|calc\([^)]+\)|[\d.]+\s*(?:px|rem|em|vw|vh|%))$/i', |
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$value |
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); |
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} |
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} |
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|
