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+ <?php
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+
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+ namespace ProgrammatorDev \Validator \Rule ;
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+
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+ use ProgrammatorDev \Validator \Exception \CssColorException ;
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+ use ProgrammatorDev \Validator \Exception \UnexpectedOptionException ;
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+ use ProgrammatorDev \Validator \Exception \UnexpectedTypeException ;
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+
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+ class CssColor extends AbstractRule implements RuleInterface
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+ {
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+ public const FORMAT_HEX_LONG = 'hex-long ' ;
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+ public const FORMAT_HEX_LONG_WITH_ALPHA = 'hex-long-with-alpha ' ;
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+ public const FORMAT_HEX_SHORT = 'hex-short ' ;
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+ public const FORMAT_HEX_SHORT_WITH_ALPHA = 'hex-short-with-alpha ' ;
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+ public const FORMAT_BASIC_NAMED_COLORS = 'basic-named-colors ' ;
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+ public const FORMAT_EXTENDED_NAMED_COLORS = 'extended-named-colors ' ;
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+ public const FORMAT_SYSTEM_COLORS = 'system-colors ' ;
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+ public const FORMAT_KEYWORDS = 'keywords ' ;
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+ public const FORMAT_RGB = 'rgb ' ;
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+ public const FORMAT_RGBA = 'rgba ' ;
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+ public const FORMAT_HSL = 'hsl ' ;
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+ public const FORMAT_HSLA = 'hsla ' ;
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+
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+ private const COLOR_FORMATS = [
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+ self ::FORMAT_HEX_LONG ,
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+ self ::FORMAT_HEX_LONG_WITH_ALPHA ,
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+ self ::FORMAT_HEX_SHORT ,
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+ self ::FORMAT_HEX_SHORT_WITH_ALPHA ,
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+ self ::FORMAT_BASIC_NAMED_COLORS ,
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+ self ::FORMAT_EXTENDED_NAMED_COLORS ,
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+ self ::FORMAT_SYSTEM_COLORS ,
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+ self ::FORMAT_KEYWORDS ,
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+ self ::FORMAT_RGB ,
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+ self ::FORMAT_RGBA ,
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+ self ::FORMAT_HSL ,
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+ self ::FORMAT_HSLA
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+ ];
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+
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+ private const PATTERN_HEX_LONG = '/^#[0-9a-f]{6}$/i ' ;
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+ private const PATTERN_HEX_LONG_WITH_ALPHA = '/^#[0-9a-f]{8}$/i ' ;
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+ private const PATTERN_HEX_SHORT = '/^#[0-9a-f]{3}$/i ' ;
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+ private const PATTERN_HEX_SHORT_WITH_ALPHA = '/^#[0-9a-f]{4}$/i ' ;
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+ // https://www.w3.org/wiki/CSS/Properties/color/keywords#Basic_Colors
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+ private const PATTERN_BASIC_NAMED_COLORS = '/^(black|silver|gray|white|maroon|red|purple|fuchsia|green|lime|olive|yellow|navy|blue|teal|aqua)$/i ' ;
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+ // https://www.w3.org/wiki/CSS/Properties/color/keywords#Extended_colors
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+ private const PATTERN_EXTENDED_NAMED_COLORS = '/^(aliceblue|antiquewhite|aqua|aquamarine|azure|beige|bisque|black|blanchedalmond|blue|blueviolet|brown|burlywood|cadetblue|chartreuse|chocolate|coral|cornflowerblue|cornsilk|crimson|cyan|darkblue|darkcyan|darkgoldenrod|darkgray|darkgreen|darkgrey|darkkhaki|darkmagenta|darkolivegreen|darkorange|darkorchid|darkred|darksalmon|darkseagreen|darkslateblue|darkslategray|darkslategrey|darkturquoise|darkviolet|deeppink|deepskyblue|dimgray|dimgrey|dodgerblue|firebrick|floralwhite|forestgreen|fuchsia|gainsboro|ghostwhite|gold|goldenrod|gray|green|greenyellow|grey|honeydew|hotpink|indianred|indigo|ivory|khaki|lavender|lavenderblush|lawngreen|lemonchiffon|lightblue|lightcoral|lightcyan|lightgoldenrodyellow|lightgray|lightgreen|lightgrey|lightpink|lightsalmon|lightseagreen|lightskyblue|lightslategray|lightslategrey|lightsteelblue|lightyellow|lime|limegreen|linen|magenta|maroon|mediumaquamarine|mediumblue|mediumorchid|mediumpurple|mediumseagreen|mediumslateblue|mediumspringgreen|mediumturquoise|mediumvioletred|midnightblue|mintcream|mistyrose|moccasin|navajowhite|navy|oldlace|olive|olivedrab|orange|orangered|orchid|palegoldenrod|palegreen|paleturquoise|palevioletred|papayawhip|peachpuff|peru|pink|plum|powderblue|purple|red|rosybrown|royalblue|saddlebrown|salmon|sandybrown|seagreen|seashell|sienna|silver|skyblue|slateblue|slategray|slategrey|snow|springgreen|steelblue|tan|teal|thistle|tomato|turquoise|violet|wheat|white|whitesmoke|yellow|yellowgreen)$/i ' ;
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+ // https://drafts.csswg.org/css-color/#css-system-colors
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+ private const PATTERN_SYSTEM_COLORS = '/^(AccentColor|AccentColorText|ActiveText|ButtonBorder|ButtonFace|ButtonText|Canvas|CanvasText|Field|FieldText|GrayText|Highlight|HighlightText|LinkText|Mark|MarkText|SelectedItem|SelectedItemText|VisitedText)$/i ' ;
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+ // https://drafts.csswg.org/css-color/#transparent-color
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+ // https://drafts.csswg.org/css-color/#currentcolor-color
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+ private const PATTERN_KEYWORDS = '/^(transparent|currentColor)$/i ' ;
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+ private const PATTERN_RGB = '/^rgb\(\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d)\s*\)$/i ' ;
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+ private const PATTERN_RGBA = '/^rgba\(\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),\s*(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),\s*(0|0?\.\d+|1(\.0)?)\s*\)$/i ' ;
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+ private const PATTERN_HSL = '/^hsl\(\s*(0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),\s*(0|100|\d{1,2})%,\s*(0|100|\d{1,2})%\s*\)$/i ' ;
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+ private const PATTERN_HSLA = '/^hsla\(\s*(0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),\s*(0|100|\d{1,2})%,\s*(0|100|\d{1,2})%,\s*(0|0?\.\d+|1(\.0)?)\s*\)$/i ' ;
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+
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+ private const COLOR_PATTERNS = [
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+ self ::FORMAT_HEX_LONG => self ::PATTERN_HEX_LONG ,
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+ self ::FORMAT_HEX_LONG_WITH_ALPHA => self ::PATTERN_HEX_LONG_WITH_ALPHA ,
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+ self ::FORMAT_HEX_SHORT => self ::PATTERN_HEX_SHORT ,
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+ self ::FORMAT_HEX_SHORT_WITH_ALPHA => self ::PATTERN_HEX_SHORT_WITH_ALPHA ,
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+ self ::FORMAT_BASIC_NAMED_COLORS => self ::PATTERN_BASIC_NAMED_COLORS ,
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+ self ::FORMAT_EXTENDED_NAMED_COLORS => self ::PATTERN_EXTENDED_NAMED_COLORS ,
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+ self ::FORMAT_SYSTEM_COLORS => self ::PATTERN_SYSTEM_COLORS ,
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+ self ::FORMAT_KEYWORDS => self ::PATTERN_KEYWORDS ,
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+ self ::FORMAT_RGB => self ::PATTERN_RGB ,
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+ self ::FORMAT_RGBA => self ::PATTERN_RGBA ,
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+ self ::FORMAT_HSL => self ::PATTERN_HSL ,
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+ self ::FORMAT_HSLA => self ::PATTERN_HSLA
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+ ];
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+
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+ private array $ formats = self ::COLOR_FORMATS ;
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+ private string $ message = 'The {{ name }} value is not a valid CSS color. ' ;
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+
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+ public function __construct (
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+ ?array $ formats = null ,
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+ ?string $ message = null
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+ )
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+ {
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+ $ this ->formats = $ formats ?? $ this ->formats ;
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+ $ this ->message = $ message ?? $ this ->message ;
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+ }
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+
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+ public function assert (mixed $ value , ?string $ name = null ): void
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+ {
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+ foreach ($ this ->formats as $ format ) {
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+ if (!\in_array ($ format , self ::COLOR_FORMATS , true )) {
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+ throw new UnexpectedOptionException ('format ' , self ::COLOR_FORMATS , $ format );
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+ }
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+ }
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+
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+ if (!\is_string ($ value )) {
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+ throw new UnexpectedTypeException ('string ' , get_debug_type ($ value ));
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+ }
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+
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+ foreach ($ this ->formats as $ format ) {
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+ $ pattern = self ::COLOR_PATTERNS [$ format ];
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+
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+ // it is valid if at least one pattern matches
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+ if (\preg_match ($ pattern , $ value )) {
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+ return ;
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+ }
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+ }
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+
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+ throw new CssColorException (
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+ message: $ this ->message ,
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+ parameters: [
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+ 'value ' => $ value ,
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+ 'name ' => $ name ,
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+ 'formats ' => $ this ->formats
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+ ]
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+ );
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+ }
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+ }
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