Support relative path

README.md

@@ -39,12 +39,12 @@ Imagine to implement Pokédex on iOS. You can access somewhere via URL scheme.
 ```swift
 router = DefaultRouter(scheme: "pokedex")
 router.register([
-    ("pokedex://pokemons", { context in 
+    ("/pokemons", { context in 
         let type: Type? = context.parameter(for: "type")
         presentPokedexListViewController(for: type)
         return true 
     }),
-    ("pokedex://pokemons/:pokedexID", { context in 
+    ("/pokemons/:pokedexID", { context in 
         guard let pokedexID: Int? = try? context.argument(for: "pokedexID") else {
             // pokedexID must be Int
             return false

Sources/Crossroad/Router.swift

@@ -59,21 +59,28 @@ public final class Router<UserInfo> {
         return routes.first { $0.responds(to: url, userInfo: userInfo) } != nil
     }
 
+    private func canonicalizePattern(_ pattern: String) -> String {
+        if pattern.hasPrefix("/") {
+            return String(pattern.dropFirst())
+        }
+        return pattern
+    }
+
     public func register(_ routes: [(String, Route<UserInfo>.Handler)]) {
         for (pattern, handler) in routes {
             let patternURLString: String
             switch prefix {
             case .scheme(let scheme):
                 if pattern.hasPrefix("\(scheme)://") {
-                    patternURLString = pattern
+                    patternURLString = canonicalizePattern(pattern)
                 } else {
-                    patternURLString = "\(scheme)://\(pattern)"
+                    patternURLString = "\(scheme)://\(canonicalizePattern(pattern))"
                 }
             case .url(let url):
                 if pattern.hasPrefix(url.absoluteString) {
-                    patternURLString = pattern
+                    patternURLString = canonicalizePattern(pattern)
                 } else {
-                    patternURLString = url.appendingPathComponent(pattern).absoluteString
+                    patternURLString = url.appendingPathComponent(canonicalizePattern(pattern)).absoluteString
                 }
             }
             guard let patternURL = PatternURL(string: patternURLString) else {

Tests/CrossroadTests/RouterTests.swift

@@ -76,6 +76,29 @@ final class RouterTest: XCTestCase {
         XCTAssertFalse(router.responds(to: URL(string: "spam/ham")!))
     }
 
+    func testCanRespondWithRelativePath() {
+        let router = SimpleRouter(scheme: scheme)
+        router.register([
+            ("/static", { _ in true }),
+            ("/foo/bar", { _ in true }),
+            ("/spam/ham", { _ in false }),
+            ("/:keyword", { _ in true }),
+            ("/foo/:keyword", { _ in true }),
+            ])
+        XCTAssertTrue(router.responds(to: URL(string: "foobar://static")!))
+        XCTAssertTrue(router.responds(to: URL(string: "foobar://foo")!))
+        XCTAssertTrue(router.responds(to: URL(string: "foobar://foo/bar")!))
+        XCTAssertTrue(router.responds(to: URL(string: "foobar://foo/10000")!))
+        XCTAssertFalse(router.responds(to: URL(string: "notfoobar://aaa/bbb")!))
+        XCTAssertTrue(router.responds(to: URL(string: "foobar://spam/ham")!))
+        XCTAssertFalse(router.responds(to: URL(string: "static")!))
+        XCTAssertFalse(router.responds(to: URL(string: "foo")!))
+        XCTAssertFalse(router.responds(to: URL(string: "foo/bar")!))
+        XCTAssertFalse(router.responds(to: URL(string: "foo/10000")!))
+        XCTAssertFalse(router.responds(to: URL(string: "aaa/bbb")!))
+        XCTAssertFalse(router.responds(to: URL(string: "spam/ham")!))
+    }
+
     func testCanRespondWithoutPrefixWithURLPrefix() {
         let router = SimpleRouter(url: URL(string: "https://example.com/")!)
         router.register([
@@ -231,6 +254,50 @@ final class RouterTest: XCTestCase {
         wait(for: [expectation], timeout: 2.0)
     }
 
+    func testHandleWithSlashPrefix() {
+        let router = SimpleRouter(scheme: scheme)
+        let expectation = self.expectation(description: "Should called handler four times")
+        expectation.expectedFulfillmentCount = 4
+        router.register([
+            ("/static", { context in
+                XCTAssertEqual(context.url, URL(string: "foobar://static")!)
+                expectation.fulfill()
+                return true
+            }),
+            ("/foo/bar", { context in
+                XCTAssertEqual(context.parameter(for: "param0"), 123)
+                XCTAssertEqual(context.url, URL(string: "foobar://foo/bar?param0=123")!)
+                expectation.fulfill()
+                return true
+            }),
+            ("/:keyword", { context in
+                XCTAssertEqual(context.url, URL(string: "foobar://hoge")!)
+                XCTAssertEqual(try? context.argument(for: "keyword"), "hoge")
+                expectation.fulfill()
+                return true
+            }),
+            ("/foo/:keyword/:keyword2", { context in
+                XCTAssertEqual(context.url, URL(string: "foobar://foo/hoge/fuga")!)
+                XCTAssertEqual(try? context.argument(for: "keyword"), "hoge")
+                XCTAssertEqual(try? context.argument(for: "keyword2"), "fuga")
+                expectation.fulfill()
+                return true
+            }),
+            ])
+        XCTAssertTrue(router.openIfPossible(URL(string: "foobar://static")!))
+        XCTAssertTrue(router.openIfPossible(URL(string: "foobar://foo/bar?param0=123")!))
+        XCTAssertTrue(router.openIfPossible(URL(string: "foobar://hoge")!))
+        XCTAssertTrue(router.openIfPossible(URL(string: "foobar://foo/hoge/fuga")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "foobar://spam/ham")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "notfoobar://static")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "static")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "foo/bar?param0=123")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "hoge")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "foo/hoge/fuga")!))
+        XCTAssertFalse(router.openIfPossible(URL(string: "spam/ham")!))
+        wait(for: [expectation], timeout: 2.0)
+    }
+
     func testHandleWithoutPrefixWithURLPrefix() {
         let router = SimpleRouter(url: URL(string: "https://example.com")!)
         let expectation = self.expectation(description: "Should called handler four times")