From 92b58f22afbf44f4b87ce9856c6fd14b1f04da37 Mon Sep 17 00:00:00 2001
From: "C. McEnroe" <june@causal.agency>
Date: Wed, 9 Jun 2021 17:20:17 -0400
Subject: Limit number of entries in index Atom feed

---
 concat.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'concat.c')

diff --git a/concat.c b/concat.c
index 64e543f..3e03f3b 100644
--- a/concat.c
+++ b/concat.c
@@ -230,13 +230,19 @@ void concatThreads(struct List threads, const struct Envelope *envelopes) {
 	}
 }
 
+static int numberCompare(const void *_a, const void *_b) {
+	const struct Data *a = _a;
+	const struct Data *b = _b;
+	return (b->number > a->number) - (b->number < a->number);
+}
+
 struct Sort {
 	size_t index;
 	time_t updated;
 	time_t created;
 };
 
-static int compar(const void *_a, const void *_b) {
+static int sortCompare(const void *_a, const void *_b) {
 	const struct Sort *a = _a;
 	const struct Sort *b = _b;
 	if (a->updated == b->updated) {
@@ -246,6 +252,8 @@ static int compar(const void *_a, const void *_b) {
 	}
 }
 
+size_t concatIndexEntries = 20;
+
 void concatIndex(struct List threads, const struct Envelope *envelopes) {
 	const char *path = "index.atom";
 	FILE *file = fopen(path, "w");
@@ -256,7 +264,8 @@ void concatIndex(struct List threads, const struct Envelope *envelopes) {
 
 	struct List flat = {0};
 	listFlatten(&flat, threads);
-	for (size_t i = flat.len - 1; i < flat.len; --i) {
+	qsort(flat.ptr, flat.len, sizeof(*flat.ptr), numberCompare);
+	for (size_t i = 0; i < flat.len && i < concatIndexEntries; ++i) {
 		uint32_t uid = dataCheck(flat.ptr[i], Number).number;
 		char *src = uidPath(uid, "atom");
 		error = concatFile(file, src);
@@ -283,7 +292,7 @@ void concatIndex(struct List threads, const struct Envelope *envelopes) {
 		order[i].created = envelopes[i].time;
 		order[i].updated = status.st_mtime;
 	}
-	qsort(order, threads.len, sizeof(*order), compar);
+	qsort(order, threads.len, sizeof(*order), sortCompare);
 
 	path = "index.html";
 	file = fopen(path, "w");
-- 
cgit 1.4.1