From 0fc1a7b52aa88c8fda126df9498c1be64d891571 Mon Sep 17 00:00:00 2001
From: Codex <codex@local>
Date: Tue, 13 Oct 2026 22:01:57 +0200
Subject: [PATCH] Mark sparse MangaDex hosted catalogs as partial

---
 scraper/adapters/mangadex.js           | 6 +++++-
 scraper/test/mangadex-specials.test.js | 5 ++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/scraper/adapters/mangadex.js b/scraper/adapters/mangadex.js
index 2723beb..92638bf 100644
--- a/scraper/adapters/mangadex.js
+++ b/scraper/adapters/mangadex.js
@@ -72,6 +72,10 @@ function availabilitySummary(attributes, releases, chapters, externalReleases =
   const numbered = chapters.filter(ref => !ref.special);
   const expected = chapterNumber(attributes.lastChapter);
   const maximum = numbered.length ? Math.max(...numbered.map(ref => Number(ref.number))) : null;
+  // Reaching the final chapter number is not full coverage when the catalog
+  // contains fewer distinct numbered releases than the expected chapter span.
+  const expectedCount = expected && /^\d+$/.test(expected) ? Number(expected) : null;
+  const sparse = expectedCount && numbered.length < expectedCount;
   const reason = chapters.length ? null : externalReleases > 0 ? 'external-only'
     : Array.isArray(attributes.availableTranslatedLanguages) && !attributes.availableTranslatedLanguages.includes('en') ? 'no-english' : 'no-hosted-pages';
   const message = reason === 'external-only' ? `MangaDex lists ${externalReleases} English external-link releases, but no hosted English pages. External links are not downloaded.`
@@ -80,7 +84,7 @@ function availabilitySummary(attributes, releases, chapters, externalReleases =
   return { language: 'en', hostedReleases: releases.filter(r => !r.attributes?.externalUrl && Number(r.attributes?.pages) > 0).length,
     selectedChapters: chapters.length, numberedChapters: numbered.length, specialReleases: chapters.length - numbered.length,
     externalReleases, expectedLastChapter: expected, highestHostedChapter: maximum,
-    coverage: expected && (maximum === null || maximum < Number(expected)) ? 'partial' : 'unknown', reason, message };
+    coverage: expected && (maximum === null || maximum < Number(expected) || sparse) ? 'partial' : 'unknown', reason, message };
 }
 
 async function jsonGet(http, url) {
diff --git a/scraper/test/mangadex-specials.test.js b/scraper/test/mangadex-specials.test.js
index 5c70207..796b9d9 100644
--- a/scraper/test/mangadex-specials.test.js
+++ b/scraper/test/mangadex-specials.test.js
@@ -39,7 +39,9 @@ test('availability distinguishes no English, external-only, and partial hosted c
   const chapters = selectChapterReleases([release('regular-fixture', '336')]);
   const summary = availabilitySummary({ lastChapter: '686' }, [release('regular-fixture', '336')], chapters);
   assert.equal(summary.coverage, 'partial'); assert.equal(summary.selectedChapters, 1);
-  assert.equal(availabilitySummary({ lastChapter: '336' }, [], chapters).coverage, 'unknown', 'Highest number alone does not prove completeness');
+  assert.equal(availabilitySummary({ lastChapter: '336' }, [], chapters).coverage, 'partial', 'One late chapter does not cover the earlier 335');
+  const full = selectChapterReleases(['1', '2', '3'].map((number, index) => release(`full-${index}`, number)));
+  assert.equal(availabilitySummary({ lastChapter: '3' }, [], full).coverage, 'unknown', 'A plausible count is still not proof of whole-series completeness');
 });
 
 test('catalog uses separate external-only feed only when hosted selections are empty', async () => {
@@ -130,6 +132,7 @@ test('inspection waits for confirmation, survives restart, and uses one normal s
 test('edition change after confirmation cannot silently download another edition', async () => {
   const service = Object.create(ScraperService.prototype);
   service.persist = async () => {};
+  service.state = { sourceLedger: {} };
   const item = { title: 'slug', confirmedSourceTitle: 'Pilot edition' };
   await assert.rejects(service.recordCatalog(item, { title: 'Main edition', chapters: [] }), /edition title changed/);
 });