// Capitalize string
@function capitalize($string) {
	@return to-upper-case(str-slice($string, 1, 1)) + str-slice($string, 2);
}

// Uncapitalize string
@function uncapitalize($string) {
	@return to-lower-case(str-slice($string, 1, 1)) + str-slice($string, 2);
}

// Capitalize each word in string
@function ucwords($string) {
	$progress: $string;
	$result: "";

	$running: true;

	@while $running {
		$index: str-index($progress, " ");
		@if $index {
			$result: $result + capitalize(str-slice($progress, 1, $index));
			$progress: str-slice($progress, ($index + 1));
		} @else {
			$running: false;
		}
	}

	@return capitalize($result) + capitalize($progress);
}

// Return whether `$value` is contained in `$list`
@function contain($list, $value) {
	@return not not index($list, $value);
}

// Trims the start/left of the string
@function trimLeft($string, $exclude) {
	@if str-length($string) == 0 {
		@return $string;
	}

	$firstChar: str-slice($string, 1, 1);

	@if (contain($exclude, $firstChar)) {
		@return trimLeft(str-slice($string, 2), $exclude);
	} @else {
		@return $string;
	}
}

// Trims the end/right of the string
@function trimRight($string, $exclude) {
	@if str-length($string) == 0 {
		@return $string;
	}

	$lastChar: str-slice($string, str-length($string), -1);

	@if (contain($exclude, $lastChar)) {
		@return trimRight(str-slice($string, 1, -2), $exclude);
	} @else {
		@return $string;
	}
}

// Trims the start and end of the string
@function trim($string, $exclude) {
	@return trimRight(trimLeft($string, $exclude), $exclude);
}

// Camelize string
@function camelize($string) {
	$exclude: (" ", "-", "_", ",", ";", ":", ".", "+", "*");
	$result: "";
	$progress: uncapitalize(trim($string, $exclude));

	@while str-length($progress) > 0 {
		$char: str-slice($progress, 1, 1);

		@if contain($exclude, $char) {
			$progress: capitalize(str-slice($progress, 2, 2)) +
				str-slice($progress, 3);
		} @else {
			$result: $result + $char;
			$progress: str-slice($progress, 2);
		}
	}

	@return $result;
}