Change the precedence of EPUB series

CHANGELOG.md

@@ -16,6 +16,12 @@ All notable changes to this project will be documented in this file. Take a look
 
 * The Presentation Hints properties are deprecated from the Readium Web Publication Manifest models. [See the official documentation](https://readium.org/webpub-manifest/profiles/epub.html#appendix-b---deprecated-properties).
 
+### Changed
+
+#### Streamer
+
+* EPUB series added with Calibre now take precedence over the native EPUB ones in the `belongsToSeries` RWPM property.
+
 ### Fixed
 
 #### Streamer

Sources/Shared/Toolkit/URL/RelativeURL.swift

@@ -69,10 +69,23 @@ public struct RelativeURL: URLProtocol, Hashable {
         resolvedComponents.fragment = otherComponents.fragment
         resolvedComponents.query = otherComponents.query
 
-        guard let resolvedURL = resolvedComponents.url?.standardized else {
+        guard var resolvedURL = resolvedComponents.url?.standardized else {
             return nil
         }
 
+        // Since iOS 26, resolving an `other` URL moving upwards in the
+        // hierarchy can result in an URL starting with a `/`, which is not
+        // what we want.
+        if
+            !path.hasPrefix("/"),
+            !other.path.hasPrefix("/"),
+            resolvedURL.path.hasPrefix("/"),
+            var components = URLComponents(url: resolvedURL, resolvingAgainstBaseURL: true)
+        {
+            components.path.removeFirst()
+            resolvedURL = components.url ?? resolvedURL
+        }
+
         return RelativeURL(url: resolvedURL)
     }
 

Sources/Streamer/Parser/EPUB/EPUBMetadataParser.swift

@@ -449,6 +449,21 @@ final class EPUBMetadataParser: Loggable {
 
     /// https://github.com/readium/architecture/blob/master/streamer/parser/metadata.md#collections-and-series
     private lazy var belongsToSeries: [Metadata.Collection] = {
+        let calibrePosition = metas["series_index", in: .calibre].first
+            .flatMap { Double($0.content) }
+
+        let calibreSeries = metas["series", in: .calibre]
+            .map { meta in
+                Metadata.Collection(
+                    name: meta.content,
+                    position: calibrePosition
+                )
+            }
+
+        if !calibreSeries.isEmpty {
+            return calibreSeries
+        }
+
         let epub3Series = metas["belongs-to-collection"]
             // `collection-type` should be "series"
             .filter { meta in
@@ -459,20 +474,7 @@ final class EPUBMetadataParser: Loggable {
             }
             .compactMap(collection(from:))
 
-        if !epub3Series.isEmpty {
-            return epub3Series
-        }
-
-        let epub2Position = metas["series_index", in: .calibre].first
-            .flatMap { Double($0.content) }
-
-        return metas["series", in: .calibre]
-            .map { meta in
-                Metadata.Collection(
-                    name: meta.content,
-                    position: epub2Position
-                )
-            }
+        return epub3Series
     }()
 
     private func collection(from meta: OPFMeta) -> Metadata.Collection? {

Tests/SharedTests/Toolkit/URL/RelativeURLTests.swift

@@ -129,7 +129,6 @@ class RelativeURLTests: XCTestCase {
         XCTAssertEqual(RelativeURL(string: "foo")!.removingLastPathSegment().string, "./")
         XCTAssertEqual(RelativeURL(string: "foo/bar")!.removingLastPathSegment().string, "foo/")
         XCTAssertEqual(RelativeURL(string: "foo/bar/")!.removingLastPathSegment().string, "foo/")
-        XCTAssertEqual(RelativeURL(string: "/")!.removingLastPathSegment().string, "/../")
         XCTAssertEqual(RelativeURL(string: "/foo")!.removingLastPathSegment().string, "/")
         XCTAssertEqual(RelativeURL(string: "/foo/bar")!.removingLastPathSegment().string, "/foo/")
         XCTAssertEqual(RelativeURL(string: "/foo/bar/")!.removingLastPathSegment().string, "/foo/")