feat: add Safari extension for sourcehut deep linksv3.4.0

1 files changed, 80 insertions, 0 deletions

diff --git a/Shared/SourceHutWebDeepLinkMapper.swift b/Shared/SourceHutWebDeepLinkMapper.swift
new file mode 100644
index 0000000..236e32e
--- /dev/null
+++ b/Shared/SourceHutWebDeepLinkMapper.swift
@@ -0,0 +1,80 @@
+import Foundation
+
+enum SourceHutWebDeepLinkMapper {
+    static let supportedHosts: Set<String> = [
+        "git.sr.ht",
+        "hg.sr.ht",
+        "todo.sr.ht",
+        "builds.sr.ht",
+        "lists.sr.ht",
+        "meta.sr.ht",
+        "sr.ht",
+    ]
+
+    static func deepLink(for webURL: URL) -> URL? {
+        guard let components = URLComponents(url: webURL, resolvingAgainstBaseURL: false),
+              components.scheme == "https",
+              let host = components.host?.lowercased(),
+              supportedHosts.contains(host)
+        else {
+            return nil
+        }
+
+        let path = normalizedPercentEncodedPath(from: components.percentEncodedPath)
+        let deepLinkPath = normalizedDeepLinkPath(for: host, path: path)
+        let service = deepLinkService(for: host, path: deepLinkPath)
+        var deepLinkComponents = URLComponents()
+        deepLinkComponents.scheme = "hutch"
+        deepLinkComponents.host = service
+
+        if !deepLinkPath.isEmpty {
+            deepLinkComponents.percentEncodedPath = "/" + deepLinkPath
+        }
+        deepLinkComponents.percentEncodedQuery = components.percentEncodedQuery
+        deepLinkComponents.percentEncodedFragment = components.percentEncodedFragment
+        return deepLinkComponents.url
+    }
+
+    private static func deepLinkService(for host: String, path: String) -> String {
+        if isOwnerRootPath(path) {
+            return "lookup"
+        }
+
+        switch host {
+        case "git.sr.ht":
+            return "git"
+        case "hg.sr.ht":
+            return "hg"
+        case "todo.sr.ht":
+            return "todo"
+        case "builds.sr.ht":
+            return "builds"
+        case "lists.sr.ht":
+            return "lists"
+        default:
+            return "lookup"
+        }
+    }
+
+    private static func isOwnerRootPath(_ path: String) -> Bool {
+        let components = path.split(separator: "/", omittingEmptySubsequences: true)
+        return components.count == 1 && components[0].hasPrefix("~")
+    }
+
+    private static func normalizedDeepLinkPath(for host: String, path: String) -> String {
+        let components = path.split(separator: "/", omittingEmptySubsequences: true)
+        if host == "sr.ht",
+           components.count == 2,
+           components[0] == "projects",
+           components[1].hasPrefix("~") {
+            return String(components[1])
+        }
+        return path
+    }
+
+    private static func normalizedPercentEncodedPath(from path: String) -> String {
+        path
+            .split(separator: "/", omittingEmptySubsequences: true)
+            .joined(separator: "/")
+    }
+}