wifi=("${(f)"$(/usr/sbin/iw dev wlp4s0 link)"}")
wifi_ssid=${wifi[(r)[^:]SSID:*]//[^:]*: /}
wifi_strength=$((2 * (${${wifi[(r)[^:]signal:*]//[^:]*: /}/ *} + 100)))

print "$wifi_ssid ($wifi_strength%)"