rework wttr wrapper

roles/wttr/files/wttr.sh

@@ -1,3 +1,27 @@
-#!/bin/sh
+#!/bin/bash
 
-curl wttr.in/"${1:-$(curl http://ip-api.com/json | jq 'if (.zip | length) != 0 then .zip else .city end')}"
+# Get the location from ip-api.com if the user didn't specify.
+location="$1"
+if [ -z "$1" ]; then
+    location_data=$(curl -s http://ip-api.com/json)
+    location=$(echo "$location_data" | jq -r 'if (.zip | length) != 0 then .zip else .city end')
+    lat=$(echo "$location_data" | jq '.lat')
+    lon=$(echo "$location_data" | jq '.lon')
+    country=$(echo "$location_data" | jq -r '.country')
+fi
+
+# Request the narrow version when appropriate.
+columns=$(tput cols)
+opts='?'
+if [ "$columns" -lt 125 ]; then
+    opts+='n'
+fi
+
+# If we fetched coordinates and are in the US, provide a URL to the detailed forecast.
+if [ "$country" == "United States" ] && [ -n "$lat" ] && [ -n "$lon" ]; then
+    details="https://forecast.weather.gov/MapClick.php?lat=$lat&lon=$lon&FcstType=graphical&menu=1"
+fi
+
+weather=$(curl -s -H "Accept-Language: ${LANG%_*}" --compressed wttr.in/"$location$opts")
+
+echo "$weather"$'\n\n'"$details" | LESS="-F -w -R -X -z-4" less