#!/bin/bash

# uses https://github.com/hedgedoc/cli to download notes as markdown and commit them to a
# git repo
#
# mandatory files in pwd:
#  .hedgeserver - the URL of the hedgedoc instance
#  .hedgebak - note IDs to back up
# optional:
#  .hedgecookie - cookie to use (e.g. for owner-accessible notes)

set -eu

ID_FILE=.hedgebak
SERVER_FILE=.hedgeserver
COOKIE_FILE=.hedgecookie

if [ ! -d ".git" ]; then
  echo "not a git repo, exiting"
  exit -1
fi

if [ ! -f "$SERVER_FILE" ]; then
  echo "$SERVER_FILE does not exist, exiting"
  exit -1
fi

SERVER=`cat "$SERVER_FILE"`

if [ ! -f "$COOKIE_FILE" ]; then
  $COOKIE_FILE=""
fi

if [ ! -f "$ID_FILE" ]; then
  echo "$ID_FILE does not exist, exiting"
  exit -1
fi

while read id; do
  outfile=`HEDGEDOC_SERVER="$SERVER" HEDGEDOC_COOKIES_FILE="$COOKIE_FILE" hedgedoc export --md "$id"`
  if [ "$?" == "0" ]; then
    echo "$outfile"
    git add "$outfile"
  fi
done < "$ID_FILE"

DATE=`date --utc +"%Y%m%d_%H%M"`
git commit -m "note backup $DATE (utc)"
git push