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/srv/data/web/vhosts/716cf56cb2.url-de-test.ws/htdocs/assets/styles/_scss/_functions.scss
 // Bootstrap functions
//
// Utility mixins and functions for evalutating source code across our variables, maps, and mixins.

// Ascending
// Used to evaluate Sass maps like our grid breakpoints.
@mixin _assert-ascending($map, $map-name) {
  $prev-key: null;
  $prev-num: null;
  @each $key, $num in $map {
    @if $prev-num == null {
      // Do nothing
    } @else if not comparable($prev-num, $num) {
      @warn "Potentially invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} whose unit makes it incomparable to #{$prev-num}, the value of the previous key '#{$prev-key}' !";
    } @else if $prev-num >= $num {
      @warn "Invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} which isn't greater than #{$prev-num}, the value of the previous key '#{$prev-key}' !";
    }
    $prev-key: $key;
    $prev-num: $num;
  }
}

// Starts at zero
// Another grid mixin that ensures the min-width of the lowest breakpoint starts at 0.
@mixin _assert-starts-at-zero($map) {
  $values: map-values($map);
  $first-value: nth($values, 1);
  @if $first-value != 0 {
    @warn "First breakpoint in `$grid-breakpoints` must start at 0, but starts at #{$first-value}.";
  }
}

// Replace `$search` with `$replace` in `$string`
// Used on our SVG icon backgrounds for custom forms.
//
// @author Hugo Giraudel
// @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: "") {
  $index: str-index($string, $search);

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

  @return $string;
}

// Color contrast
@function color-yiq($color) {
  $r: red($color);
  $g: green($color);
  $b: blue($color);

  $yiq: (($r * 299) + ($g * 587) + ($b * 114)) / 1000;

  @if ($yiq >= $yiq-contrasted-threshold) {
    @return $yiq-text-dark;
  } @else {
    @return $yiq-text-light;
  }
}

// Retrieve color Sass maps
@function color($key: "blue") {
  @return map-get($colors, $key);
}

@function theme-color($key: "primary") {
  @return map-get($theme-colors, $key);
}

@function gray($key: "100") {
  @return map-get($grays, $key);
}

// Request a theme color level
@function theme-color-level($color-name: "primary", $level: 0) {
  $color: theme-color($color-name);
  $color-base: if($level > 0, #000, #fff);
  $level: abs($level);

  @return mix($color-base, $color, $level * $theme-color-interval);
}

// Pixel to Rem
@function rem($pixel) {
  $base: 16;
  @return ($pixel / $base) * 1rem;
}

// Stars
@function selectStarColor() {
  $random-index: random($limit: 4);
  $star-color: nth($star-colors, $random-index);

  @return $star-color;
}

@function createStars($index) {
  $stars: "";

  @for $i from 0 through $index {
    @if $i ==0 {
      $stars: "#{random($galaxyBounds)}px #{random($galaxyBounds)}px #{selectStarColor()}";
    }

    @else {
      $stars: "#{$stars} , #{random($galaxyBounds)}px #{random($galaxyBounds)}px #{selectStarColor()}";
    }
  }

  @return unquote($stars);
}

@mixin star-template($numStars, $starSize, $scrollSpeed) {
  width: $starSize;
  height: $starSize;
  border-radius: 50%;
  background: transparent;
  box-shadow: createStars($numStars);
  animation: animStar $scrollSpeed linear infinite;
}

@mixin shooting-star-template($numStars, $starSize, $speed) {
  z-index: 10;
  width: $starSize;
  height: $starSize;
  border-top-left-radius: 50%;
  border-top-right-radius: 50%;
  ;
  position: absolute;
  //   bottom: 0;
  bottom: random($limit: $galaxyOffset);
  //   right: 0;
  right: random($limit: $galaxyOffset);
  background: linear-gradient(to top, rgba(255, 255, 255, 0), rgba(255, 255, 255, 1));
  animation: animShootingStar $speed linear infinite;
}