#!/bin/bash

#FCC Database Lookup Offline
#11JULY2025 km4ack
#26JULY2025 last edit

#script will download the FCC amateur database of call signs
#allowing to user to access the info offline

#Script can be automated using crontab to download the database
#Hint: 0 6 * * * /path/to/file/fcc download 

#version 3 changes:
#add grid square lookup if data file available
#version 2 changes:
#add logging to mylog.txt
#add verbose option. usage: fcc <call sign> -v
#add logic if call not found

CALL=$1
dir=$HOME/.local/share/fcc_database/
dl=${dir}dl_date
AM=${dir}AM.dat
EN=${dir}EN.dat
today=$(date +%d-%b-%Y)
mylog=$HOME/Documents/mylog.txt
version=3.0

declare -u CALL=${CALL}

if [ -f ${dl} ]; then
  source ${dl}
fi

PURGE(){
  if [ -d ${dir}old ]; then
    echo "purging old DB files"
    rm -rf ${dir}old
    echo "purge complete"
    exit
  else
    echo "no old db files found"
    exit
  fi
}

DOWNLOAD(){
  mkdir -p ${dir}
  echo "downloading"
  cd ${dir}
  mkdir -p old
  mv * ./old/
  wget -U "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)" https://data.fcc.gov/download/pub/uls/complete/l_amat.zip
  echo "extracting contents from zip file"
  unzip l_amat.zip
  rm l_amat.zip
  rm CO.dat counts HD.dat HS.dat LA.dat SC.dat SF.dat
  echo last_download=${today} > ${dl}
  echo `date` " FCC Download" >> ${mylog}
  echo;echo
  echo "usage:"
  echo "fcc <call sign>     #get data for <call sign>"
  echo "fcc download        #download latest database"     
  echo "fcc purge           #purge old archives"
  exit
}

OUTPUT(){
  if [ -z "${en_result}" ] && [ -z "${am_result}" ]; then
    clear;echo
    echo "-------------------------------"
    echo "FCC Offline Database Tool v${version}"
    echo "Database downloaded ${last_download}"
    echo "-------------------------------"
    echo;echo "Call not found";echo
    read -p "Call sign or q to quit: " CALL

    if [ "${CALL}" = "q" ] || [ ${CALL} = "Q" ]; then
      echo "Station QRT, 73!"
      exit
    fi
    LOOKUP
  else
    clear;echo
    echo "-------------------------------"
    echo "FCC Offline Database Tool v${version}"
    echo "Database downloaded ${last_download}"
    echo "-------------------------------"
    echo ${CALL}
    echo "${name}"
    echo "${full_class} class"
    echo ${street}
    echo "${city}, ${state} ${zip}"
    if [ -n "${grid}" ]; then
      echo "${grid}"
    fi
    if [ ${CALL} = "KM4ACK" ]; then
      echo "https://www.youtube.com/@KM4ACK"
    fi
    echo
    read -p "Call sign or (q)uit (v)erbose: " ans

    if [ "${ans}" = "q" ] || [ ${ans} = "Q" ]; then
      echo "Station QRT, 73!"
      exit
    fi

    if [ "${ans}" = "v" ] || [ ${ans} = "V" ]; then
      VERBOSE
    else
      CALL=${ans}
    fi
    LOOKUP
  fi
}

LOOKUP(){
  am_result=$(grep -iw ${CALL} ${AM} | tail -1)
  en_result=$(grep -iw ${CALL} ${EN} | tail -1)
  class=$(echo ${am_result} | awk -F "|" '{print $6}')
  case ${class} in
    T)
      full_class=Technician;;
    G)
      full_class=General;;
    E)
      full_class=Extra;;
    *)
      full_class=unknown;;
  esac
  name=$(echo ${en_result} | awk -F "|" '{print $8}')
  street=$(echo ${en_result} | awk -F "|" '{print $16}')
  city=$(echo ${en_result} | awk -F "|" '{print $17}')
  state=$(echo ${en_result} | awk -F "|" '{print $18}')
  zip=$(echo ${en_result} | awk -F "|" '{print $19}' | cut -b1-5)
  if [ -d $HOME/bin/grid-lookup ]; then
    grid=$($HOME/bin/grid-lookup/grid-lookup ${zip})
  fi
  OUTPUT
}

VERBOSE(){
  clear;echo
  echo "-------------------------------"
  echo "FCC Offline Database Tool v${version}"
  echo "Database downloaded ${last_download}"
  echo "-------------------------------"
  echo "***VERBOSE RESULTS***"
  echo "---------------------"
  grep -iw ${CALL} ${AM}
  echo "----------------------------------------"
  grep -iw ${CALL} ${EN}
  echo;echo "END OF RESULTS"
  echo;read -n 1 -s -r -p "Press any key to continue"
  LOOKUP
}

if [ -z $1 ]; then
  echo "usage:"
  echo "fcc <call sign>     #get data for <call sign>"
  echo "fcc download        #download latest database"     
  echo "fcc purge           #purge old archives"
  exit 1
fi

if [ $1 = "download" ]; then
  DOWNLOAD
fi

if [ $1 = "purge" ]; then
  PURGE
fi

if [ -z $2 ]; then
  echo "fetching data"
else
  if [ $2 = "-v" ]; then
    VERBOSE
  fi
fi

if [ ! -d ${dir} ]; then
  echo "ERROR::Database not found!"
  echo "Download FCC database with:"
  echo "fcc download"
  exit 1
fi
LOOKUP