// Used for creating the source string for fonts using @font-face
// Reference: http://goo.gl/Ru1bKP

@function font-url-prefixer($asset-pipeline) {
  @if $asset-pipeline == true {
    @return font-url;
  } @else {
    @return url;
  }
}

@function font-source-declaration(
  $font-family,
  $file-path,
  $asset-pipeline,
  $file-formats,
  $font-url) {

  $src: null;

  $formats-map: (
    eot:   $font-url + "(\"#{$file-path}.eot?#iefix\")" format("embedded-opentype"),
    woff2: $font-url + "(\"#{$file-path}.woff2\")" format("woff2"),
    woff:  $font-url + "(\"#{$file-path}.woff\")" format("woff"),
    ttf:   $font-url + "(\"#{$file-path}.ttf\")" format("truetype"),
    svg:   $font-url + "(\"#{$file-path}.svg##{$font-family}\")" format("svg")
  );

  @each $format, $file-path in $formats-map {
    @if contains($file-formats, $format) {
      $src: append($src, $file-path, comma);
    }
  }

  @return $src;
}