doppler.sh: add forecast options, clean code

doppler.sh

@@ -1,7 +1,12 @@
 #!/bin/sh
+# doppler.sh
 
 IMAGE_URL="https://radar.weather.gov/lite/N0R/FSX_loop.gif"
 VIDEO_PLAYER=/usr/bin/mpv
+LINK_DOWNLOADER=/usr/bin/curl
+FORECAST_URL="wttr.in"
+TERMINAL_APP=/usr/bin/xterm
+TERMINAL_OPTS="-maximized -hold -e"
 
 if [[ ! -f "${VIDEO_PLAYER}" ]];then
 	echo "${VIDEO_PLAYER} not found"
@@ -10,5 +15,27 @@ if [[ ! -f "${VIDEO_PLAYER}" ]];then
 	exit 1
 fi
 
-notify-send "Getting radar image" "please wait..."
-${VIDEO_PLAYER} --loop=inf "${IMAGE_URL}"
+if [[ ! -f "${LINK_DOWNLOADER}" ]];then
+	echo "${VIDEO_PLAYER} not found"
+	echo "Please install it with your system's package manager"
+	notify-send "${VIDEO_PLAYER} not found" "Please install it with your system's package manager"
+	exit 1
+fi
+
+case "${1}" in
+
+
+	-f | forecast)
+		echo "Getting forecast from ${FORECAST_URL}..."
+		${TERMINAL_APP} ${TERMINAL_OPTS} ${LINK_DOWNLOADER} ${FORECAST_URL}
+	;;
+
+	-h | help | --help)
+		echo -e "\nUsage: ${0} [-f | forecast ], [-h, help, --help]\n"
+	;;
+
+	*)
+		notify-send "Getting radar image" "please wait..."
+		${VIDEO_PLAYER} --loop=inf "${IMAGE_URL}"
+	;;
+esac