feat(latest): parse newest chapter for novelfull and lightnovelworld

backend/internal/latest/sites.go

@@ -1,6 +1,7 @@
 package latest
 
 import (
+	"net/url"
 	"regexp"
 	"strconv"
 	"strings"
@@ -34,6 +35,17 @@ var comixSlugRe = regexp.MustCompile(`/title/([^/?#]+)`)
 // there are no anchors to scan.
 var kaganeChapterRe = regexp.MustCompile(`"chapter_no":"([0-9.]+)"`)
 
+// novelfullSlugRe pulls the series slug out of a stored series_url. novelfull
+// series pages are "/<slug>.html"; their chapter anchors are
+// "/<slug>/chapter-<n>[-<title-slug>].html". Verified live 2026-08-05.
+var novelfullSlugRe = regexp.MustCompile(`^/([^/?#]+)\.html$`)
+
+// lnwSlugRe does the same for lightnovelworld, whose series pages live under
+// /novel/<slug>/ while its chapter URLs are flat at the site root:
+// "/<slug>-chapter-<n>/", absolute in the page's own anchors. Verified live
+// 2026-08-05.
+var lnwSlugRe = regexp.MustCompile(`^/novel/([^/?#]+)/?$`)
+
 // latestChapterFrom returns the highest chapter number body advertises for this
 // series. ok is false when the body yields nothing usable — an unknown site, an
 // empty body, a Cloudflare challenge page, and a site redesign all land here,
@@ -86,6 +98,29 @@ func latestChapterFrom(site, seriesURL, body string) (latestChapter, bool) {
 		re = regexp.MustCompile(`"latestChapterUrl":"/title/` + regexp.QuoteMeta(id) + `-[^"]*-chapter-([0-9.]+)"`)
 	case "kagane":
 		re = kaganeChapterRe
+	case "novelfull":
+		u, err := url.Parse(seriesURL)
+		if err != nil {
+			return latestChapter{}, false
+		}
+		m := novelfullSlugRe.FindStringSubmatch(u.Path)
+		if m == nil {
+			return latestChapter{}, false
+		}
+		// Scoped to this series' slug for the same reason asura is: page 1
+		// carries a "latest chapters" widget and a "you may also like" strip,
+		// and neither may contribute to the maximum.
+		re = regexp.MustCompile(`/` + regexp.QuoteMeta(m[1]) + `/chapter-([0-9.]+)`)
+	case "lightnovelworld":
+		u, err := url.Parse(seriesURL)
+		if err != nil {
+			return latestChapter{}, false
+		}
+		m := lnwSlugRe.FindStringSubmatch(u.Path)
+		if m == nil {
+			return latestChapter{}, false
+		}
+		re = regexp.MustCompile(`lightnovelworld\.net/` + regexp.QuoteMeta(m[1]) + `-chapter-([0-9.]+)/`)
 	default:
 		return latestChapter{}, false
 	}

backend/internal/latest/sites_test.go

@@ -52,6 +52,33 @@ const kaganeAPIFixture = `
 {"book_id":"c","title":"Episode 40.5","chapter_no":"40.5","sort_no":40}]}
 `
 
+// Trimmed from https://novelfull.com/reverend-insanity.html fetched 2026-08-05.
+// The page carries a newest-first "latest chapters" widget above an
+// oldest-first paginated list, so the newest anchor is deliberately NOT last —
+// only a maximum finds it. The final anchor belongs to another series and must
+// be excluded by slug scoping.
+const novelfullSeriesFixture = `
+<div class="l-chapters">
+  <a href="/reverend-insanity/chapter-2334-fang-yuan-and-giant-sun.html">Chapter 2334</a>
+  <a href="/reverend-insanity/chapter-2333-three-venerables.html">Chapter 2333</a>
+</div>
+<ul class="list-chapter">
+  <li><a href="/reverend-insanity/chapter-1.html">Chapter 1</a></li>
+  <li><a href="/reverend-insanity/chapter-2.html">Chapter 2</a></li>
+</ul>
+<a href="/release-that-witch/chapter-9999.html">Chapter 9999</a>
+`
+
+// Trimmed from https://lightnovelworld.net/novel/a-will-eternal/ fetched
+// 2026-08-05. Its chapter anchors are absolute and flat — /<slug>-chapter-<n>/
+// at the site root, not under /novel/. The last anchor is another series'.
+const lnwSeriesFixture = `
+<a href="https://lightnovelworld.net/a-will-eternal-chapter-1/">Chapter 1</a>
+<a href="https://lightnovelworld.net/a-will-eternal-chapter-1317/">Chapter 1317</a>
+<a href="https://lightnovelworld.net/a-will-eternal-chapter-1298/">Chapter 1298</a>
+<a href="https://lightnovelworld.net/overgeared-chapter-9999/">Chapter 9999</a>
+`
+
 func TestLatestChapterFrom(t *testing.T) {
 	const asuraURL = "https://asurascans.com/comics/chronicles-of-the-demon-faction-f886a8af"
 	const demonicURL = "https://demonicscans.org/manga/Catastrophic-Necromancer"
@@ -146,6 +173,48 @@ func TestLatestChapterFrom(t *testing.T) {
 			body:      challengeFixture,
 			wantOK:    false,
 		},
+		{
+			name:      "novelfull takes the max and ignores another series",
+			site:      "novelfull",
+			seriesURL: "https://novelfull.com/reverend-insanity.html",
+			body:      novelfullSeriesFixture,
+			wantOK:    true, wantNum: 2334, wantLabel: "Chapter 2334",
+		},
+		{
+			name:      "novelfull yields nothing on a challenge page",
+			site:      "novelfull",
+			seriesURL: "https://novelfull.com/reverend-insanity.html",
+			body:      challengeFixture,
+			wantOK:    false,
+		},
+		{
+			name:      "novelfull with an unparseable series url",
+			site:      "novelfull",
+			seriesURL: "https://novelfull.com/genre/Fantasy",
+			body:      novelfullSeriesFixture,
+			wantOK:    false,
+		},
+		{
+			name:      "lightnovelworld takes the max and ignores another series",
+			site:      "lightnovelworld",
+			seriesURL: "https://lightnovelworld.net/novel/a-will-eternal/",
+			body:      lnwSeriesFixture,
+			wantOK:    true, wantNum: 1317, wantLabel: "Chapter 1317",
+		},
+		{
+			name:      "lightnovelworld tolerates a series url with no trailing slash",
+			site:      "lightnovelworld",
+			seriesURL: "https://lightnovelworld.net/novel/a-will-eternal",
+			body:      lnwSeriesFixture,
+			wantOK:    true, wantNum: 1317, wantLabel: "Chapter 1317",
+		},
+		{
+			name:      "lightnovelworld yields nothing on a challenge page",
+			site:      "lightnovelworld",
+			seriesURL: "https://lightnovelworld.net/novel/a-will-eternal/",
+			body:      challengeFixture,
+			wantOK:    false,
+		},
 	}
 
 	for _, tt := range tests {