source deploy/docker/logging.sh

# usage: loadVariable VAR [DEFAULT]
#    ie: file_env 'DB_PASSWORD' 'example'
# (will allow for "$DB_PASSWORD_FILE" to fill in the value of
#  "$DB_PASSWORD" from a file, especially for Docker's secrets feature)
loadVariable() {
  local variable="$1"
  local variableFile="${variable}_FILE"
  local default="${2:-}"
  if [ "${!variable:-}" ] && [ "${!variableFile:-}" ]; then
    logError "Both $variable and $variableFile are set (but are exclusive)"
  fi
  local value="$default"
  if [ "${!variable:-}" ]; then
    value="${!variable}"
  elif [ "${!variableFile:-}" ]; then
    value="$(<"${!variableFile}")"
  fi
  export "$variable"="$value"
  unset "$variableFile"
}

# loads various settings
setupEnvironment() {
  loadVariable 'TIMEZONE' 'Etc/GMT'

#  loadVariable 'MIGRATION_PARAM' ''
#  # initialize values that might be stored in a file
#  loadVariable 'MYSQL_HOST'
#  loadVariable 'MYSQL_DATABASE' 'defaultDatabase'
#  loadVariable 'MYSQL_USER' 'defaultUser'
#  loadVariable 'MYSQL_PASSWORD'

  # initialize values that might be stored in a file
  loadVariable 'TOKEN'
  loadVariable 'OWNER' 'default owner'
}

# verify required environment.
verifyEnvironment() {
  if [ -z "$TOKEN" ]; then
    logError $'Token is not completely filled\n\tYou need to specify $TOKEN'
  fi
#  if [ -z "$MYSQL_HOST" -o -z "$MYSQL_PASSWORD" ]; then
#    logError $'MYSQL databases credentials is not completely filled\n\tYou need to specify $MYSQL_HOST, $MYSQL_PASSWORD'
#  fi
}

setupEnvironment
verifyEnvironment