twitter-wxbot.sh

 #!/bin/bash
 # Twitter PWS Status Bot
 # Author: Kenny Stier <weather@flexstart.me>
 #
 # Gathers Personal Weather Station data from Weather Underground
 # and sends tweets throughout the day

 # Twitter Credentials
 username="user"
 password="password"

 # Wunderground PWS ID
 pws="KINMILLH2"
 # Wunderground API Key
 key="api-key here"

 # What type of tweet is to be sent?
 tweetType=$1

# If tweeting current conditions...
if [ "$tweetType" = "current" ]; then 

# Download PWS Data
wget --quiet -O /tmp/wu-api.json https://api.wunderground.com/api/$key/conditions/q/pws:$pws.json

 # Calculate Age of PWS Data in Seconds

 localEpoch=$(jshon -e current_observation -e local_epoch -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
 currentEpoch=$(date +%s)
 observationEpoch=$(jshon -e current_observation -e observation_epoch -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
 observationAge=$(expr $currentEpoch - $observationEpoch)

	# Determine if WU has recent PWS data
	if [ "$observationAge" -le "3600" ]; then
		temperature=$(jshon -e current_observation -e temp_f -F /tmp/wu-api.json)
		weather=$(jshon -e current_observation -e weather -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		winds=$(jshon -e current_observation -e wind_string -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//' | sed -e 's/^./\L&\E/')
		humidity=$(jshon -e current_observation -e relative_humidity -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		feelsLike=$(jshon -e current_observation -e feelslike_f -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		feelsLikeDiff=$(expr $(printf "%.0f" "$temperature") - $feelsLike)
		rainTotal=$(jshon -e current_observation -e precip_today_in -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		visibilityMI=$(jshon -e current_observation -e visibility_mi -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		if [ "$feelsLikeDiff" -lt "0" ]; then
		        feelsLikeDiff=$(expr $feelsLikeDiff * -1)
		fi
		if [ "$rainTotal" != "0.00" ]; then
			rain=$(echo We have gotten $rainTotal inches of rain so far today.)
		fi
		if [ $(printf "%.0f" "$visibilityMI") -le "3" ]; then
			visibility=$(echo The visibility is currently $visibilityMI miles.)
		fi
		if [ "$feelsLikeDiff" -gt "5" ]; then
			feelsLikeString=$(echo It feels like it\'s "$feelsLike" degrees outside.)
		fi
		tweet=$(echo It\'s currently $(printf "%.1f" "$temperature") degrees and "$weather" with the winds "$winds". The humidity is at "$humidity".)
		tweet2=$(echo $feelsLikeString $rain $visibility)
	fi
fi

# If tweeting today's forecast...
if [ "$tweetType" = "todayForecast" ]; then
	wget --quiet -O /tmp/wu-api.json https://api.wunderground.com/api/$key/forecast/q/pws:$pws.json
	daytime=$(jshon -e forecast -e txt_forecast -e forecastday -e 0 -e fcttext -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
	evening=$(jshon -e forecast -e txt_forecast -e forecastday -e 1 -e fcttext -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
	tweet=$(echo "Today: $daytime")
	tweet2=$(echo "Tonight: $evening") 
fi

# If tweeting tomorrow's forecast...
if [ "$tweetType" = "tomorrowForecast" ]; then
	wget --quiet -O /tmp/wu-api.json https://api.wunderground.com/api/$key/forecast/q/pws:$pws.json
	daytime=$(jshon -e forecast -e txt_forecast -e forecastday -e 2 -e fcttext -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
	evening=$(jshon -e forecast -e txt_forecast -e forecastday -e 3 -e fcttext -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
	tweet=$(echo "Tomorrow: $daytime")
	tweet2=$(echo "Tomorrow Evening: $evening") 
fi

# If tweeting daily summary...
if [ "$tweetType" = "dailySummary" ]; then
	wget --quiet -O /tmp/wu-api.json https://api.wunderground.com/api/$key/conditions/q/pws:$pws.json
		rainTotal=$(jshon -e current_observation -e precip_today_in -F /tmp/wu-api.json | sed -e 's/^"//' -e 's/"$//')
		if [ "$rainTotal" != "0.00" ]; then
			tweet=$(echo Today, we got a total of $rainTotal inches of rain.)
		fi
fi

# upload to imgur - curl -s https://gist.githubusercontent.com/vivien/9768953/raw/imgur | sh -s
tweet () {
tweetlen=${#tweet}
if [ $tweetlen -eq 0 ] || [ $tweetlen -gt 140 ]; then
if [ $tweetlen -gt 140 ]; then
let EXTRA=$tweetlen-140
let EXTRAtail=$EXTRA+7
echo "(Tweet is $EXTRA characters too long and has been cut into two."
tweet1_1=$(echo "(1/1) $tweet" | cut -c1-140)
tweet1_2=$(echo "(1/2) $tweet" | tail -c "$EXTRAtail")
twidge update "$tweet1_2"
twidge update "$tweet1_1"
else
echo "Tweet was empty, nothing sent"
fi
else
twidge update "$tweet"
fi
}

tweet2 () {
tweetlen2=${#tweet2}
if [ $tweetlen2 -eq 0 ] || [ $tweetlen2 -gt 140 ]; then
if [ $tweetlen2 -gt 140 ]; then
let EXTRA2=$tweetlen2-140
let EXTRA2tail=$EXTRA2+7
echo "Tweet is $EXTRA2 characters too long and has been cut into two."
tweet2_1=$(echo "(1/1) $tweet2" | cut -c1-140)
tweet2_2=$(echo "$tweet2" | tail -c "$EXTRA2tail" | awk '$0="(1/2) "$0')
twidge update "$tweet2_2"
twidge update "$tweet2_1"
else
echo "Tweet was empty, nothing sent"
fi
else
twidge update "$tweet2"
fi
}

if [ "$tweet2" != "" ]; then
	tweet2
	echo $tweet2
fi

if [ "$tweet" != "" ]; then
	tweet
	echo $tweet
fi


 rm "/tmp/wu-api.json"

exit 0