From 57025734d0bcac7acab49cacb5cf5dd6af5be7d3 Mon Sep 17 00:00:00 2001
From: Fuwn <contact@fuwn.net>
Date: Fri, 27 Mar 2026 11:05:26 +0000
Subject: fix(manga): restore progress-based volume recommendations

---
 apps/proxy/src/mangadex.js | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'apps/proxy/src/mangadex.js')

diff --git a/apps/proxy/src/mangadex.js b/apps/proxy/src/mangadex.js
index d2a42154..dea33e70 100644
--- a/apps/proxy/src/mangadex.js
+++ b/apps/proxy/src/mangadex.js
@@ -223,9 +223,37 @@ const chooseLatestAggregateChapter = (volumes) => {
 	return latest;
 };
 
+const buildVolumeChapterBoundaries = (volumes) => {
+	const boundaries = {};
+
+	for (const [volumeKey, volumeEntry] of Object.entries(volumes || {})) {
+		const chapters = volumeEntry?.chapters || {};
+
+		for (const chapterEntry of Object.values(chapters)) {
+			const volumeText =
+				chapterEntry?.volume || volumeEntry?.volume || volumeKey || null;
+			const volumeNumber = parseOptionalNumber(volumeText);
+			const chapterNumber = parseOptionalNumber(chapterEntry?.chapter || null);
+
+			if (volumeNumber === null || chapterNumber === null) continue;
+
+			const key = String(volumeNumber);
+			const current = boundaries[key];
+
+			if (current === undefined || chapterNumber > current)
+				boundaries[key] = chapterNumber;
+		}
+	}
+
+	return Object.keys(boundaries).length ? boundaries : null;
+};
+
 const buildIndexedRow = (manga, mangadexId, aggregateResponse) => {
 	const now = new Date().toISOString();
 	const latest = chooseLatestAggregateChapter(aggregateResponse?.volumes);
+	const volumeChapterBoundaries = buildVolumeChapterBoundaries(
+		aggregateResponse?.volumes,
+	);
 
 	return {
 		anilist_id: manga.anilistId,
@@ -233,6 +261,7 @@ const buildIndexedRow = (manga, mangadexId, aggregateResponse) => {
 		latest_en_chapter_text: latest?.chapterText || null,
 		latest_en_chapter_number: latest?.chapterNumber || null,
 		latest_en_volume_text: latest?.volumeText || null,
+		volume_chapter_boundaries: volumeChapterBoundaries,
 		latest_en_chapter_id: latest?.chapterId || null,
 		latest_chapter_updated_at: now,
 		last_seen_at: now,
-- 
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