SCSS mixin for font loading, logical directory scheme required

font-loader.scss

/**
 * Load font-faces with no pain, that follow a named directory pattern
 * GoogleFonts does so
 * ---
 * @params {String}      $name  - the name of the font
 * @params {String}      $path  - font directory path
 * @params {Map<String>} $types - the font-types you want to load ("Thin", "ThinItalic", "Light", "LightItalic", "Regular", "Italic", "Medium", "MediumItalic", "Bold", "BoldItalic", "ExtraBold", "ExtraBoldItalic", "Black", "BlackItalic")
 * @returns {void}
 * ---
 * @licence MIT
 * @author Andreas Schujkow <a.schujkow@gmail.com>
 * @gist https://gist.github.com/SpaceRhino/46b693d8c2fc980355a0884fc5013c97
 * ---
 * @example ```
 * Folder structure
 * +++++++++++++++++++++++++++++++++++++++++++
 * │──fonts
 *    │──FiraCode
 *    │  │──FiraCode-Bold.ttf
 *    │  │──FiraCode-Regular.ttf
 *    │  └──FiraCode-Italic.ttf
 *    └──Alegreya
 *       │──Alegreya-Regular.ttf
 *       │──Alegreya-Italic.ttf
 *       │──Alegreya-Bold.ttf
 *       │──Alegreya-BoldItalic.ttf
 *       │──Alegreya-Black.ttf
 *       └──Alegreya-BlackItalic.ttf
 * +++++++++++++++++++++++++++++++++++++++++++
 * And then just import them
 * @import "./path/to/font-loader.scss";
 * @include font-loader("FiraCode", "/path/to/fonts", ("Bold", "Regular", "Italic"));
 * @include font-loader("Alegreya", "/path/to/fonts", $default-font-loader-types-with-black);
 * ```
 */
 @mixin font-loader ($name: false, $path: false, $types: $default-font-loader-types) {
  @if ($name != false) {
    @if ($path != false) {
      @each $type in $types {
        @at-root {
          @font-face {
            font-family: "#{$name}";
            src: url($path + '/' + $name + '/' + $name + '-' + $type + '.ttf');
            
            @if ($type == 'Thin') {
              font-weight: 100;
            } @else if ($type == 'ThinItalic') {
              font-weight: 100;
              font-style: italic;
            } @else if ($type == 'Light') {
              font-weight: 300;
            } @else if ($type == 'LightItalic') {
              font-weight: 300;
              font-style: italic;
            } @else if ($type == 'Italic') {
              font-style: italic;
            } @else if ($type == 'Medium') {
              font-weight: 500;
            } @else if ($type == 'MediumItalic') {
              font-weight: 500;
              font-style: italic;
            } @else if ($type == 'Bold') {
              font-weight: 700;
            } @else if ($type == 'BoldItalic') {
              font-weight: 700;
              font-style: italic;
            } @else if ($type == 'ExtraBold') {
              font-weight: 800;
            } @else if ($type == 'ExtraBoldItalic') {
              font-weight: 800;
              font-style: italic;
            } @else if ($type == 'Black') {
              font-weight: 900;
            } @else if ($type == 'BlackItalic') {
              font-weight: 900;
              font-style: italic;
            }
          }
        }
      }
    } @else {
      @error "Please provide a $path as the second argument to the font-loader mixin";
    }
  } @else {
    @error "Please provide a $name as the first argument to the font-loader mixin";
  }
}

/* Common font types */
$default-font-loader-types-with-black: (
  "Regular",
  "Italic",
  "Bold",
  "BoldItalic",
  "Black",
  "BlackItalic"
);

$default-font-loader-types: (
  "Regular",
  "Italic",
  "Bold",
  "BoldItalic"
);