#!/bin/bash

# helper script to check the local language list against mozilla


export CARCH="${CARCH:-$(uname -m)}"


prompt() {
  if cmp "$1"{,.pkgnew} > /dev/null; then
    echo "$1 unchanged"
    rm -f "$1.pkgnew"
  else
    diff -rupN "$1"{,.pkgnew}
    while true; do
      read -n1 -p "[a]pply, [d]elete, [m]erge, [s]kip, [q]uit " resp ; echo ;
      case $resp in
        a) mv "$1"{.pkgnew,}
           break
           ;;
        d) rm -f "$1".pkgnew
           break
           ;;
        m) vimdiff "$1"{,.pkgnew}
           rm "$1".pkgnew
           break
           ;;
        s) break
           ;;
        q) exit
           ;;
        *) ;;
      esac
    done
  fi
}


## extract metadata from PKGBUILD ##

pkgbase="$(bash -c "source PKGBUILD && echo \"\$_pkgbase\"")"
url="$(    bash -c "source PKGBUILD && echo \"\$_src_url\"")/"
echo "attempting update to language lists for '$pkgbase'"
echo -e "  CARCH: $CARCH\n  URL: $url"
read -n1 -p "is this correct? [Yn] " resp ; echo ; [[ "$resp" =~ n|N ]] && exit ;


## generate new language list ##

mkdir -p src
echo "_languages=("  > "languages.$CARCH.pkgnew"
echo "_sha512sums=(" > "sha512sums.$CARCH.pkgnew"
for lang in $(curl -sL "$url" | grep '\.xpi' | cut -d'"' -f2 | rev | cut -d'/' -f1 | cut -d'.' -f2 | rev | sort); do
  printf "\r  %-3s..." "${lang%%-*}"
  curl -s -o src/"$lang.xpi" "${url%/}/$lang.xpi"
  sha512sum="$(sha512sum "src/$lang.xpi" | cut -d' ' -f1)"
  name="$(unzip -p "src/$lang.xpi" manifest.json | grep "  \"name" | cut -d':' -f2- | cut -d'"' -f2)"

  printf "  '%-5s  \"%s\"'\n" "$lang" "$name" >> "languages.$CARCH.pkgnew"
  printf "  '%s'\n" "$sha512sum"              >> "sha512sums.$CARCH.pkgnew"
done
echo
echo ")" >> "languages.$CARCH.pkgnew"
echo ")" >> "sha512sums.$CARCH.pkgnew"


## compare and update lang-pack/checksums lists ##

prompt "languages.$CARCH"
prompt "sha512sums.$CARCH"


## update PKGBUILD checksums for lang-pack/checksums lists ##

_languages_shasum="$( sha512sum "languages.$CARCH"  | cut -d' ' -f1)"
_sha512sums_shasum="$(sha512sum "sha512sums.$CARCH" | cut -d' ' -f1)"

sed -e "s/^_languages_${CARCH}_shasum=.*/_languages_${CARCH}_shasum=\"${_languages_shasum}\"/" \
    -e "s/^_sha512sums_${CARCH}_shasum=.*/_sha512sums_${CARCH}_shasum=\"${_sha512sums_shasum}\"/" \
  PKGBUILD > PKGBUILD.pkgnew
prompt "PKGBUILD"