forecast

#!/bin/bash
#		 Required    Optional
# Use: forecast  <location>  <units>

# Importing Prefs.cfg #
source Prefs.cfg

# First parameter after command #
location=$(echo $1 | sed 's/\-/%20/g')

# Optional parameters after required parameter #
for i in {2..3}
do
	eval temp='$'$i
	if [[ ! -z $temp ]]
	then
		case $temp in
			"-c")
				clear
				;;
			"-i")
				units="imperial"
				;;
			"-m")
				units="metric"
				;;
		esac
	fi
done

# Time format selection #
if [[ "$units" == "imperial" ]]
then
	unitTemp="F"
	unitWind="mph"
else
	unitTemp="C"
	unitWind="m/s"
fi

# array used as text to put before weather conditions
weatherText=("-" "- The temperature will be around " "$unitTemp, with a minimum of " "$unitTemp, and a maximum of " "$unitTemp. Weather of the day: " ". The wind velocity will be around " "$unitWind. Finally, the chance of raining in this day is ")

read vWeatherFull < <(echo $(curl -s --request GET --url 'api.openweathermap.org/data/2.5/forecast?q='$location'&appid='$apiKey'&units='$units | jq '.list[] | "\(.dt)-\(.main.temp)-\(.main.temp_min)-\(.main.temp_max)-\(.weather[].main)-\(.wind.speed)-\(.pop)"'))

# This line serves to remove every quotation mark
vWeatherFull=$(echo $vWeatherFull | tr -d '"')

# Atm vWeatherFull contains all data in one variable, this line break down vWeatherFull in an array, every cell of the array is made by: time-temp-temp_min-temp_max-weather-wind-possibilityOfPrecipitation (this is one variable, it will become its own array in the next loop)#
IFS=' '  read -r -a aWeatherFull <<< "$vWeatherFull"


# Most important loop! Takes the main array and break it down in smaller arrays dynamically created #
for (( i = 0; i < ${#aWeatherFull[*]}; i++ ))
do
	IFS='-' read -r -a  aWeatherPoint$i <<< "${aWeatherFull[i]}"
done

# This loop writes weather for every three hours
for (( i = 0; i < ${#aWeatherFull[*]}; i++ ))
do
	eval time='$'"{aWeatherPoint"$i"[0]}"
	time=$(date -d @$time +%H)
	if [ $time == 12 ] || [ $time == 13 ] || [ $time == 14 ]
	then
		for (( j=0; j<7;j++ ))
		do	
			eval var='$'"{aWeatherPoint"$i"["$j"]}"
			if [[ $j == 0 ]]
			then 
				var=$(date -d @$var '+%A %d %B %Y')
			fi
			echo -n ${weatherText[$j]}$var
		done
		echo -e "\n"
	fi
done