show-dashboard.sh

#!/bin/bash
DASHY_API_URL="http://api.dashy.io"
DASHY_VIEWER_URL="http://view.dashy.io"

DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
pushd ${DIR} > /dev/null

GIT_VER="$(git rev-parse HEAD)"
echo "Dashy Device (rev. ${GIT_VER})"

popd > /dev/null

PRIMARY_DISPLAY_WIDTH="$(xrandr | grep "*" | xargs | cut -d " " -f 1 | cut -d "x" -f 1)"
PRIMARY_DISPLAY_HEIGHT="$(xrandr | grep "*" | xargs | cut -d " " -f 1 | cut -d "x" -f 2)"
SECONDARY_DISPLAY_WIDTH="$(xrandr | grep "*" | xargs | cut -d " " -f 4 | cut -d "x" -f 1)"
SECONDARY_DISPLAY_HEIGHT="$(xrandr | grep "*" | xargs | cut -d " " -f 4 | cut -d "x" -f 2)"

if [ -n "$SECONDARY_DISPLAY_WIDTH" ]; then
  MULTI_DISPLAY=true
else
  MULTI_DISPLAY=false
fi

echo "Primary display: ${PRIMARY_DISPLAY_WIDTH}x${PRIMARY_DISPLAY_HEIGHT}"
if $MULTI_DISPLAY; then
  echo "Secondary display: ${SECONDARY_DISPLAY_WIDTH}x${SECONDARY_DISPLAY_HEIGHT}"
fi

printf "Waiting for api.dashy.io to be available: "
until $(curl --output /dev/null --silent --head --fail ${DASHY_API_URL}/status); do
    printf '.'
    sleep 1
done
printf "OK\r\n"

pushd ${DIR} > /dev/null

if git diff-index --quiet HEAD --; then
  printf "Updating Dashy Device... "
  git pull
  NEW_GIT_VER="$(git rev-parse HEAD)"
  if [ "$GIT_VER" != "$NEW_GIT_VER" ]; then
    printf "\r\n"
    echo "-----------------------------------"
    echo "Dashy Device updated, restarting..."
    echo "-----------------------------------"
    ./show-dashboard.sh
    popd > /dev/null
    exit 0;
  fi
  printf "Up to date\r\n"
else
  echo "---------------------------------------------------------------------"
  echo "WARNING: The local repository is not clean, cannot check for updates." >&2
  echo "---------------------------------------------------------------------"
fi

popd > /dev/null

if [ ! -f ~/.dashy ]; then
  DASHBOARD1_ID=$(curl -s -X POST -H "Accept: application/json" "${DASHY_API_URL}/dashboards" | grep -Po '\"id\":\"\K[\w-]+')
  echo "Initialising ~/.dashy config..."
  echo "DASHY_VIEWER_URL=\"${DASHY_VIEWER_URL}\"" >> ~/.dashy
  echo "DASHY_API_URL=\"${DASHY_API_URL}\"" >> ~/.dashy
  echo "DASHBOARD1_ID=${DASHBOARD1_ID}" >> ~/.dashy
  if $MULTI_DISPLAY; then
    DASHBOARD2_ID=$(curl -s -X POST -H "Accept: application/json" "${DASHY_API_URL}/dashboards" | grep -Po '\"id\":\"\K[\w-]+')
    echo "DASHBOARD2_ID=${DASHBOARD2_ID}" >> ~/.dashy
    echo "DISPOSITION=horizontal" >> ~/.dashy
  fi
else
  echo "Using existing ~/.dashy config"
fi

source ~/.dashy

if $MULTI_DISPLAY; then
  echo "Dashboard multi-screen disposition: ${DISPOSITION}"
fi

DASHBOARD1_URL="${DASHY_VIEWER_URL}/?id=${DASHBOARD1_ID}"
DASHBOARD2_URL="${DASHY_VIEWER_URL}/?id=${DASHBOARD2_ID}"

echo "Dashboard 1 URL: ${DASHBOARD1_URL}"
if [ -n "$DASHBOARD2_ID" ]; then
  echo "Dashboard 2 URL: ${DASHBOARD2_URL}"
fi

echo "Automatically hiding the mouse cursor"
unclutter -idle 0.5 &

command -v chromium > /dev/null 2>&1 && BROWSER=chromium
command -v google-chrome-stable > /dev/null 2>&1 && BROWSER=google-chrome-stable
if [ -n "$BROWSER" ]; then
  FLAGS="--kiosk --incognito --no-first-run --noerrdialogs --no-default-browser-check"
  echo "Running ${BROWSER} on primary screen"
  ${BROWSER} ${FLAGS} --window-position=0,0 --user-data-dir="$(mktemp -d)" ${DASHBOARD1_URL} > /dev/null 2>&1 &
  if [ -n "$DASHBOARD2_ID" ]; then
    if [ "$DISPOSITION" == "horizontal" ]; then
      WINDOW_POSITION=${PRIMARY_DISPLAY_WIDTH},0
    else
      WINDOW_POSITION=0,${PRIMARY_DISPLAY_HEIGHT}
    fi
    echo "Running ${BROWSER} on secondary screen (${WINDOW_POSITION})"
    ${BROWSER} ${FLAGS} --window-position=${WINDOW_POSITION} --user-data-dir="$(mktemp -d)" ${DASHBOARD2_URL} > /dev/null 2>&1 &
  fi
  exit 0
fi

# if command -v midori >/dev/null 2>&1; then
#   echo "Running dashboard with midori"
#   midori -e Fullscreen -a ${DASHBOARD_FILE}
#   exit 0
# fi

# if command -v epiphany-browser >/dev/null 2>&1; then
#   echo "Running dashboard with epiphany-browser"
#   epiphany-browser -a --profile /tmp ${DASHBOARD_FILE}
#   exit 0
# fi

echo "ERROR: Cannot find a browser!"
exit 1