gs-gateway-sms-v3.sh -- GS Gateway SMS v3

#!/bin/bash

# require termux-api jq
# Please ensure you have give Termux:API permission to list and send SMS

cd "$(dirname "$(realpath "$0")")"

# Only single instance
exec 9>./gs-gateway-sms-v3.lock
if ! flock -n 9; then
  echo "Another instance running"
  exit 1
fi

#***!!!SECRET!!!***
GS_SERVER="https://example.com/gs-gateway-sms-v3/gs-gateway-sms-v3.php"
GS_DEVICE="example"
#***!!!/SECRET!!!***


# Last timestamp file
if [ ! -f ./.gs-gateway-sms-v3-timestamp.txt ]; then
  echo "1970-01-01 00:00">./.gs-gateway-sms-v3-timestamp.txt
fi

echo "GS--Gateway SMS v3 (Device)"
while true; do
  # Process Inbox
  now=$( date -Iseconds|cut -c1-16 )
  begin=$( cat ./.gs-gateway-sms-v3-timestamp.txt )
  end="${now/T/ }"
  echo "Iteration ${end}..."
  sleep 61
  echo "List inbox from ${begin} to ${end}"
  smses=$( termux-sms-list -l 1000000 -t inbox | jq -c -M '[.[]|del(.threadid,.type,.read)|select("'"${begin}"'"<=.received and .received<"'"${end}"'")]' )
  length=$( jq ".|length" <<< $smses )
  if [ "${length}" -gt 0 ]; then
    jq -c -M .[] <<< $smses | while read -r sms; do
      number=$( jq -r .number <<< $sms )
      body=$( jq -r .body <<< $sms )
      received=$( jq -r .received <<< $sms )
      echo "INBOX: ${number} at ${received}: ${body}"
      if [ -f ./beep.mp3 ]; then
        play-audio ./beep.mp3
      fi
    done
    echo $smses > ./.gs-gateway-sms-v3-smses.json
    roger=$( curl -s -F "smses=@./.gs-gateway-sms-v3-smses.json" "${GS_SERVER}?inbox=${GS_DEVICE}" )
    if [ "${roger}" == "ROGER" ]; then
      echo "Inbox Roger"
      echo "${end}">./.gs-gateway-sms-v3-timestamp.txt
    else
      echo "ERROR: Inbox Not Roger"
      echo "${roger}"
      if [ -f ./warn.mp3 ]; then
        play-audio ./warn.mp3
      fi
      sleep 60
    fi
  else
    echo "Inbox is empty."
  fi

  # Process Outbox
  echo "List outbox"
  smses=$( curl -s "${GS_SERVER}?outbox=${GS_DEVICE}" )
  length=$( jq ". |length" <<< $smses )
  if [ "${length}" -gt 0 ]; then
    jq -c -M .[] <<< $smses | while read -r sms; do
      number=$( jq -r .number <<< $sms )
      body=$( jq -r .body <<< $sms )
      echo "OUTBOX: ${number}: ${body}"
      if [ -f ./beep.mp3 ]; then
        play-audio ./beep.mp3
      fi
      termux-sms-send -n "${number}" "${body}"
      sleep 5
    done
    for i in {1..10}; do
      roger=$( curl -s "${GS_SERVER}?roger=${GS_DEVICE}" )
      if [ "${roger}" == "ROGER" ]; then
        echo "Outbox Roger"
        break
      else
        echo "ERROR: Outbox Not Roger--Habis nih nanti pulsa kesayanganku..."
        echo "${roger}"
        if [ -f ./warn.mp3 ]; then
          play-audio ./warn.mp3
        fi
        sleep 60
      fi
    done
  else
    echo "Outbox is empty."
  fi
done