index.scss

@use 'sass:map';
@use 'sass:string';
@use 'sass:list';

@use './map' as *;
@use './utils';

// Transform query to class
@function query-transform($keys) {
	// Combine (:)
	@if string.index($keys, ':') {
		$cls: ();
		@each $class in utils.split($keys, ':') {
			@if $class != '' {
				$cls: list.append($cls, utils.get-class($classmap, $class));
			}
		}
		@return utils.join-list($cls);
	}
	// Direct descandant (>)
	@if string.index($keys, '>') {
		@return utils.css-selector($keys, '>');
	}
	// Sibling selector (~)
	@if string.index($keys, '~') {
		@return utils.css-selector($keys, '~');
	}
	// Direct sibling selector
	@if string.index($keys, '+') {
		@return utils.css-selector($keys, '+');
	}
	@return utils.get-class($classmap, $keys);
}

@function format($keys) {
	$not: null;
	@if string.index($keys, '!') {
		$classes: utils.split($keys, '!');
		$first: if(list.nth($classes, 1) != '', query-transform(list.nth($classes, 1)), '');
		$rest: null;
		@each $class in utils.remove-nth($classes, 1) {
			@if $rest == null {
				$rest: query-transform($class);
			} @else {
				$rest: $rest + ',' + query-transform($class);
			}
		}
		$not: $first + ':not(' + $rest + ')';
	}
	@return if($not == null, query-transform($keys), $not);
}

@function cls($keys) {
	$A: ();
	$B: ();
	$C: ();

	// Split group (,)
	@each $group in utils.split($keys, ',') {
		$A: list.append($A, $group);
	}
	// Split space
	@each $query in $A {
		$B: list.append($B, utils.split($query, ' '));
	}
	// Format and join
	@each $group in $B {
		$_A: ();
		@each $query in $group {
			$_A: list.append($_A, format($query));
		}
		$C: list.append($C, utils.str-trim(utils.join-list($_A, ' ')));
	}

	@return utils.join-list($C, ',');
}