#! /usr/bin/env bash

# Create a Chrome-based Single Site Browser OSX App for a specific URL.
#
# Credit: Borrowed from somewhere and then fixed/improved by @jimeh.

if [ "$(uname)" != "Darwin" ]; then
  echo "ERROR: create-chrome-ssb only works on Mac OS X." 1>&2
  exit 1
fi

name="$1"
url="$2"
icon="$3"

if [ -z "$name" ] || [ -z "$url" ]; then
  echo 'usage: create-chrome-ssb "Google Music"' \
    '"https://play.google.com/music"'
  exit 1
fi

chrome_path="/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
if [ ! -f "$chrome_path" ]; then
  echo "ERROR: Chrome not found. Please install to: /Applications" 1>&2
  exit 1
fi

app_path="/Applications/${name}.app"
if [ -d "$app_path" ]; then
  echo "ERROR: \"${app_path}\" exits." 1>&2
  exit 1
fi

# Various paths used when creating the app.
resource_dir="${app_path}/Contents/Resources"
exec_dir="${app_path}/Contents/MacOS"
exec_file="${exec_dir}/${name//[[:space:]]/}"
plist_file="${app_path}/Contents/Info.plist"

app_support="\${HOME}/Library/Application Support"
profile_dir="${app_support}/me.jimeh.chrome-ssb/Apps/${name}"
bundle_identifier="me.jimeh.chrome-ssb.${name}"

# Create the directories.
mkdir -p "$resource_dir" "$exec_dir"

# convert the icon and copy into Resources
if [ -f "$icon" ]; then
  sips -s format tiff "$icon" \
    --out "${resource_dir}/icon.tiff" \
    --resampleWidth 128 >&/dev/null
  tiff2icns -noLarge "${resource_dir}/icon.tiff" >&/dev/null

  if [ -f "${resource_dir}/icon.tiff" ]; then
    rm "${resource_dir}/icon.tiff"
  fi
fi

# Create the executable.
cat > "$exec_file" << EOF
#!/bin/sh
mkdir -p "${profile_dir}"
exec "${chrome_path}" \\
     --app="${url}" \\
     --user-data-dir="${profile_dir}" \\
     --cancel-first-run \\
     "\$@"
EOF
chmod +x "$exec_file"

# Create the Info.plist.
cat > "$plist_file" << EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" “http://www.apple.com/DTDs/PropertyList-1.0.dtd”>
<plist version=”1.0″>
  <dict>
    <key>CFBundleExecutable</key>
    <string>$(basename "$exec_file")</string>
    <key>CFBundleIdentifier</key>
    <string>${bundle_identifier}</string>
    <key>CFBundleIconFile</key>
    <string>icon.icns</string>
  </dict>
</plist>
EOF