AutoLRPT_Meteor_M2-3

#!/bin/bash

# Including AutoLRPT's config file
. Meteor_M2-3.cfg

# Name of the satellite
satname="METEOR-M2 3"

# Get the timestamp of the upcoming/current pass and the current timestamp
pass_ts=`predict -p "$satname" | awk '{print $1}' | head -n1`
cur_ts=`date +%s`

# If the pass's timestamp is less than the current timestamp, wait for 20 minutes before progressing.
# This ensures that if AutoLRPT is being started during a pass, it will get the time of the upcoming pass
# otherways it will wait until the next day.
[[ $pass_ts -le $cur_ts ]] && sleep 20m


# Infinite loop that will always schedule the next pass after the recent one is over
while true; do

	# Automatic update of APID channels
	if [[ $upd_channels -eq 1 ]]; then

		# Updating the APID channel in mlrpt's config file ~/mlrpt/default.cfg
		if [[ $(curl --connect-timeout 10 https://usradioguy.com/meteor-satellite/ 2>/dev/null | grep -E -o '((>ON<)|(>OFF<))' | sed 's/<//g' | sed 's/>//g' | sed '4q;d') == "ON" ]]; then
			sed -i '123s/.*/67/' ~/mlrpt/default.cfg

		else
			sed -i '123s/.*/66/' ~/mlrpt/default.cfg

		fi

		# Return to ~/AutoLRPT
		cd ..

	fi

	# Get the timestamp of the upcoming/current pass and the current timestamp
	pass_ts=`predict -p "$satname" | awk '{print $1}' | head -n1`
	cur_ts=`date +%s`

	# Writing the date and time of the upcomming path into the file next_pass
	echo $(date -d @$pass_ts --utc "+%Y-%m-%d %H:%M:%S") > ~/AutoLRPT/next_pass

	# Get the UTC time of the upcoming pass from predict
	passtime=`date -d @$pass_ts --utc "+%H:%M:%S"`

	# Calculate the difference between the system time and the pass time
	difr=$(( $pass_ts - $cur_ts ))

	# Getting the elevations of the upcoming pass from predict and parsing them into an array.
	elevs=`predict '-p' "$satname" | awk '{print $5}'`
	readarray -t elev_array <<< $elevs

	# Getting the maximum elevation of the upcoming pass.
	IFS=$'\n'
	max_elev=`echo "${elev_array[*]}" | sort -nr | head -n1`

	# Getting the azimuths of the upcoming pass from predict and extracting the medium azimuth.
	readarray -t azimuth <<< $(predict -p "$satname" | awk '{print $6}')
	azimuth=${azimuth[ $(( ${#azimuth[@]} / 2 )) ]}


	# Wait until the pass begins
	sleep "$difr"s


	# Variable for the recording success/failure
		# IMAGE RECORDED    -> If an image was received and saved (successful execution of mlrpt)
		# NO_IMAGE_RECORDED -> If no image was received (successful execution of mlrpt)
		# NO_RECORDING      -> If the user disabled the recording (min_elev, evening_rec) under certain circumstances (no execution of mlrpt)
		# NO_SDR_CONNECTED  -> If mlrpt stops because no SDR was connected (unsuccessful execution of mlrpt)
		# ERROR             -> Any other errors
	rec_status=""

	# Variable to save the error code after executing mlrpt
	# 0 -> successful, >0 -> not successful
	success=1


	# Minimum elevation check
	if [[ $max_elev -ge $min_elev ]]; then

		# Check if evening_rec is enabled/disabled and if it's evening.
		if [[ $evening_rec -eq 1 ]] || [[ 10#$(date +"%H") -le 15 ]]; then

			# Check if Autoflip is enabled and if it's evening
			if [[ 10#$(date +"%H") -gt 15 ]] && [[ $autoflip -eq 1 ]]; then
				mlrpt -c M2-3.cfg -i > ~/AutoLRPT/mlrpt.log 2>&1
				success=$?
			else
				mlrpt -c M2-3.cfg > ~/AutoLRPT/mlrpt.log 2>&1
				success=$?
			fi
		else
			rec_status="NO_RECORDING"
		fi
	else
		rec_status="NO_RECORDING"
	fi


	# Generating the status
	if [[ $success -eq 0 ]] && [[ $rec_status != "NO_RECORDING" ]]; then
		if [[ -z $(grep "Saving Image" ~/AutoLRPT/mlrpt.log) ]]; then
			rec_status="NO_IMAGE_RECORDED"
		else
			rec_status="IMAGE_RECORDED"
		fi
	fi

	if [[ $success -ne 0 ]] && [[ $rec_status != "NO_RECORDING" ]]; then
		if [[ -z $(grep "Failed to open RTL-SDR device" ~/AutoLRPT/mlrpt.log) ]]; then
			rec_status="ERROR"
		else
			rec_status="NO_SDR_CONNECTED"
		fi
	fi


    	# Writing the date, time, maximum elevation, medium azimuth and success/error into the log file AutoLRPT.log
    	[ $logging -eq 1 ] && printf "%s %s %s %2d %3d %s\n" $(date --utc +%Y-%m-%d) $passtime \"$satname\" $max_elev $azimuth $rec_status >> ~/AutoLRPT/AutoLRPT.log


	# Moving the images to the webserver's image folder (Extension AutoLRPT-Slideshow)
	# The webserver's image folder (in the case below /var/www/html/images) must have writing permissions for that!
	#[[ $(ls ~/mlrpt/images) != "" ]] && mv ~/mlrpt/images/* /var/www/html/AutoLRPT-Slideshow/images


	# Wait for 20 minutes until the next pass is being scheduled
	# (This will ensure that the next pass will be scheduled although no SDR has been connected)
	sleep 20m

done