#!/usr/bin/env bash

# Generate a CSS declaration for the given font

if ! type fontforge &> /dev/null; then echo "ERROR: Missing dependency: fontforge" 1>&2; exit 1; fi

fullname=$1
basename=$(basename "$fullname" .sfdir)

output=$(fontforge --quiet -lang=py -script - "$fullname" <<EOF
import fontforge;
import sys;

font = fontforge.open(sys.argv[1]);

# Extract interesting informations
print("---")
print(font.fontname)
print(font.familyname)
print(font.fullname)
print(font.os2_weight)
print(font.italicangle)
EOF
) || exit 1

output="${output##*---
}"
old_IFS="$IFS"
IFS='
'
output=($output)
IFS="$old_IFS"

fontname=${output[0]}
familyname=${output[1]}
fullname=${output[2]}
fontweight=${output[3]}
slope=${output[4]}
if [ x"$slope" = "x0.0" ]; then
  fontstyle=normal
else
  fontstyle=italic
fi

cat > "Webfonts/${basename}-decl.css" <<EOF
@font-face {
  font-family: '${familyname}';
  src: url('${basename}.woff2') format('woff2'),
       url('${basename}.woff') format('woff'), /* Firefox >= 3.6, any other modern browser */
       url('${basename}.ttf') format('truetype'), /* Safari, Android, iOS */
       url('${basename}.svg#${fontname}') format('svg'); /* Chrome < 4, Legacy iOS */
  font-weight: ${fontweight};
  font-style: ${fontstyle};
}
EOF