#!/bin/bash
#
# Download the Tor Browser Bundle.
#

# Parameters
BASENAME="`basename $0`"
APPS="$HOME/apps"
APP_BASE="$APPS/tor-browser"
TEMP="$TMP/tor-browser"
DL="$HOME/data/apps/distros/tor/"
VERSION="$1"
ARCH="$2"
LANG="$3"
BASE_URL="https://www.torproject.org/dist/torbrowser/$VERSION"

# Syntax check
if [ -z "$VERSION" ]; then
  echo "usage: $BASENAME <version> [arch] [lang]"
  echo "example: $BASENAME 2.3.25-14-dev linux64 en-US"
  exit 1
fi

# Set arch
if [ -z "$ARCH" ]; then
  ARCH="linux64"
fi

# Set lang
if [ -z "$LANG" ]; then
  LANG="en-US"
fi

# Set file names
FILE="tor-browser-$ARCH-$VERSION"_"$LANG.tar.xz"
SIGN="$FILE.asc"

# Check existing installation
if [ -d "$APP_BASE/$ARCH-$VERSION" ]; then
  echo "TBB version $VERSION for $ARCH already installed"
  exit 1
fi

# Temp folder
mkdir -p "$TEMP"

# Download package
if [ ! -e "$DL/$FILE" ]; then
  wget -c "$BASE_URL/$FILE" -O "$DL/$FILE" || exit 1
fi

# Download signature
if [ ! -e "$DL/$SIGN" ]; then
  wget -c "$BASE_URL/$SIGN" -O "$DL/$SIGN" || exit 1
fi

# Check signature
gpg --verify "$DL/$SIGN" "$DL/$FILE" || exit 1

# Unpack
( cd "$TEMP" && tar xf "$DL/$FILE" ) || exit 1

# Move and symlink
mv "$TEMP/tor-browser_$LANG" "$APP_BASE/$ARCH-$VERSION"
rm -rf $APP_BASE/$ARCH && \
( cd "$APP_BASE" && ln -sf "$ARCH-$VERSION" "$ARCH" )

# Set pentadactyl if available
if [ -e "$HOME/.pentadactyl" ]; then
  (
    cd "$APP_BASE/$ARCH-$VERSION/Browser"
    ln -s "$HOME/.pentadactyl"
    ln -s "$HOME/.pentadactylrc"
  )
fi

# Cleanup
rm -rf "$TEMP"
echo "Please check and cleanup old versions at $APP_BASE"