app-usage-stats.sh

#!/bin/bash

function analyzeFileForDay
{
	local dateStr=$(date '+%d/%b' --date="$1 day ago")
	local count=$(grep "$dateStr" /mnt/docker-apps/traefik/logs/access.log* \
		| grep '"proxy@docker"' \
		| awk '{ print $1; }' \
		| sort \
		| uniq -c \
		| sort --numeric \
		| wc -l \
	)

	# currently 6500 enrolled students (src: https://www.thi.de/hochschule/ueber-uns/zahlen-und-fakten/)
	local percent=$(echo "$count / (6500 / 100)" | bc -l)
	printf "Unique IPs on %s: %4d or %6.3f%% market share\n" "$dateStr" "$count" "$percent"
}

for i in $(seq 0 10)
do
	analyzeFileForDay "$i"
done