Show information about IKEA Tradfri devices firmware from the official IKEA servers in Linux

tradfri.sh

#!/usr/bin/env bash
# Show information about IKEA Tradfri devices firmware from the official IKEA servers
# script by github.com/hhromic

# optional filter
declare -r FILTER=$1

# URLs for firmware channels
declare -r -A CHANNEL_URLS=(
  [CURRENT]=http://fw.ota.homesmart.ikea.net/feed/version_info.json
  [TESTING]=http://fw.test.ota.homesmart.ikea.net/feed/version_info.json
)

# terminal color settings
declare -r GRN=$(tput setaf 2 2>/dev/null)
declare -r YLW=$(tput setaf 3 2>/dev/null)
declare -r MGN=$(tput setaf 5 2>/dev/null)
declare -r CYN=$(tput setaf 6 2>/dev/null)
declare -r RST=$(tput sgr0 2>/dev/null)

# download firmware data for all channels
declare -A fw_data
printf "Downloading firmware data, please wait ...\\n"
for channel in "${!CHANNEL_URLS[@]}"; do
  fw_data+=([$channel]=$(curl -sSL "${CHANNEL_URLS[$channel]}")) || exit
done

# iterate over firmware data and report information
for channel in "${!fw_data[@]}"; do
  printf "\\n--- Firmware Channel: ${GRN}%s${RST} ---\\n" "$channel"
  while read -r fw_info; do
    fw_binary_url=$(jq -r .fw_binary_url <<< "$fw_info")
    fw_file_version_LSB=$(jq -r .fw_file_version_LSB <<< "$fw_info")
    fw_file_version_MSB=$(jq -r .fw_file_version_MSB <<< "$fw_info")
    fw_filesize=$(jq -r .fw_filesize <<< "$fw_info")
    fw_basename=${fw_binary_url##*/}
    fw_basename=${fw_basename%%.ota.ota.signed}
    fw_basename=${fw_basename%%.sig.ota.signed}
    fw_file_version=$(((fw_file_version_MSB << 16) + fw_file_version_LSB))
    [[ -n $FILTER ]] && ! grep -qi "$FILTER" <<< "$fw_basename" && continue
    printf "${CYN}%s${RST} version ${YLW}0x%x${RST}, ${MGN}%d${RST} bytes\\n" \
      "$fw_basename" "$fw_file_version" "$fw_filesize"
  done < <(jq -c "sort_by(.fw_binary_url)|.[]" <<< "${fw_data[$channel]}")
done