From d3e52a72b19b64f3443204fe9cac44637217f30b Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Sat, 25 Mar 2023 15:11:38 -0700
Subject: less repetition in awk filter

---
 backomp | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/backomp b/backomp
index 1517ef5..37efaf5 100755
--- a/backomp
+++ b/backomp
@@ -2,37 +2,33 @@
 
 set -e
 
-# FIXME: clean up repetition
 ! read -rd '' FILTER_AWK <<'EOF'
 function flr(n, s) { return int(n / s) * s }
 
 BEGIN {
-	if (match(retain, /([*0-9]+)h/, md)) hr = md[1]
-	if (match(retain, /([*0-9]+)d/, md)) dr = md[1]
-	if (match(retain, /([*0-9]+)w/, md)) wr = md[1]
-	if (match(retain, /([*0-9]+)m/, md)) mr = md[1]
+	split("h d w m", buckets)
+	for (i in buckets)
+		if (match(retain, "([*0-9]+)" buckets[i], md) && md[1])
+			ret[buckets[i]] = md[1]
 }
 
 {
 	t = mktime(gensub(/(.*\/|^)(.+)-(..)-(..)-(..)(..)(..)/,
 		"\\2 \\3 \\4 \\5 \\6 \\7", 1), 1)
 
-	h = flr(t, 60*60)
-	d = flr(t, 24*60*60)
-	m = mktime(strftime("%Y %m", t, 1) " 01 00 00 00", 1)
-	w = m + flr(t - m, 7*24*60*60)
-}
+	bt["h"] = flr(t, 60*60)
+	bt["d"] = flr(t, 24*60*60)
+	bt["m"] = mktime(strftime("%Y %m", t, 1) " 01 00 00 00", 1)
+	bt["w"] = m + flr(t - m, 7*24*60*60)
 
-h in hkeep || hr == "*" || hc++ < hr { hkeep[h] = $1 }
-d in dkeep || dr == "*" || dc++ < dr { dkeep[d] = $1 }
-w in wkeep || wr == "*" || wc++ < wr { wkeep[w] = $1 }
-m in mkeep || mr == "*" || mc++ < mr { mkeep[m] = $1 }
+	for (b in ret)
+		if ((b, bt[b]) in bkeep || ret[b] == "*" || bc[b]++ < ret[b])
+			bkeep[b, bt[b]] = $1
+}
 
 END {
-	for (i in hkeep) keep[hkeep[i]]++
-	for (i in dkeep) keep[dkeep[i]]++
-	for (i in wkeep) keep[wkeep[i]]++
-	for (i in mkeep) keep[mkeep[i]]++
+	for (i in bkeep)
+		++keep[bkeep[i]]
 
 	asorti(keep)
 	for (i in keep) print keep[i]
-- 
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