@use "sass:math";
@use "sass:string";

////
/// Helper function to easily use an SVG inline in CSS
/// without encoding it to base64, saving bytes.
/// It also helps with browser support.
////

/// A small function allowing skipping base64 encoding
/// and simply pasting the SVG markup right in the CSS.
/// @author Jakob Eriksen
/// @link http://codepen.io/jakob-e/pen/doMoML
/// @param {String} $svg - SVG image to encode
/// @return {String} - Encoded SVG data uri
@function encode($svg) {
  $encoded: "";
  $slice: 2000;
  $index: 0;
  $loops: math.ceil(math.div(string.length($svg), $slice));

  @for $i from 1 through $loops {
    $chunk: string.slice($svg, $index, $index + $slice - 1);
    $chunk: -str-replace($chunk, '"', "'");
    $chunk: -str-replace($chunk, "%", "%25");
    $chunk: -str-replace($chunk, "<", "%3C");
    $chunk: -str-replace($chunk, ">", "%3E");
    $chunk: -str-replace($chunk, "&", "%26");
    $chunk: -str-replace($chunk, "#", "%23");
    $chunk: -str-replace($chunk, "{", "%7B");
    $chunk: -str-replace($chunk, "}", "%7D");
    $encoded: #{$encoded}#{$chunk};
    $index: $index + $slice;
  }

  @return url("data:image/svg+xml,#{$encoded}");
}

/// Replace `$search` with `$replace` in `$string`
///
/// @access private
/// @author Hugo Giraudel
/// @link http://sassmeister.com/gist/1b4f2da5527830088e4d
/// @param {String} $string - Initial string
/// @param {String} $search - Substring to replace
/// @param {String} $replace ('') - New value
/// @return {String} - Updated string
@function -str-replace($string, $search, $replace: "") {
  $index: string.index($string, $search);

  @if not $index {
    @return $string;
  }

  @return string.slice($string, 1, $index - 1) + $replace +
    -str-replace(
      string.slice($string, $index + string.length($search)),
      $search,
      $replace
    );
}