1 files changed, 84 insertions, 0 deletions
diff --git a/Hutch/Extensions/SRHTWebURL.swift b/Hutch/Extensions/SRHTWebURL.swift
new file mode 100644
index 0000000..53556de
--- /dev/null
+++ b/Hutch/Extensions/SRHTWebURL.swift
@@ -0,0 +1,84 @@
+import Foundation
+
+enum SRHTWebURL {
+    static func repository(_ repository: RepositorySummary) -> URL? {
+        userScopedURL(
+            host: "\(repository.service.rawValue).sr.ht",
+            ownerCanonicalName: repository.owner.canonicalName,
+            pathComponents: [repository.name]
+        )
+    }
+
+    static func build(jobId: Int, ownerCanonicalName: String) -> URL? {
+        userScopedURL(
+            host: "builds.sr.ht",
+            ownerCanonicalName: ownerCanonicalName,
+            pathComponents: ["job", String(jobId)]
+        )
+    }
+
+    static func tracker(ownerUsername: String, trackerName: String) -> URL? {
+        userScopedURL(
+            host: "todo.sr.ht",
+            ownerUsername: ownerUsername,
+            pathComponents: [trackerName]
+        )
+    }
+
+    static func ticket(ownerUsername: String, trackerName: String, ticketId: Int) -> URL? {
+        userScopedURL(
+            host: "todo.sr.ht",
+            ownerUsername: ownerUsername,
+            pathComponents: [trackerName, String(ticketId)]
+        )
+    }
+
+    static func profile(canonicalName: String) -> URL? {
+        userScopedURL(
+            host: "meta.sr.ht",
+            ownerCanonicalName: canonicalName,
+            pathComponents: []
+        )
+    }
+
+    private static func userScopedURL(
+        host: String,
+        ownerCanonicalName: String,
+        pathComponents: [String]
+    ) -> URL? {
+        userScopedURL(
+            host: host,
+            ownerUsername: username(from: ownerCanonicalName),
+            pathComponents: pathComponents
+        )
+    }
+
+    private static func userScopedURL(
+        host: String,
+        ownerUsername: String,
+        pathComponents: [String]
+    ) -> URL? {
+        var components = URLComponents()
+        components.scheme = "https"
+        components.host = host
+
+        let encodedComponents = (["~\(ownerUsername)"] + pathComponents).map { pathComponent in
+            pathComponent.addingPercentEncoding(withAllowedCharacters: pathComponentCharacterSet) ?? pathComponent
+        }
+        components.percentEncodedPath = "/" + encodedComponents.joined(separator: "/")
+        return components.url
+    }
+
+    private static func username(from canonicalName: String) -> String {
+        if canonicalName.hasPrefix("~") {
+            return String(canonicalName.dropFirst())
+        }
+        return canonicalName
+    }
+
+    private static let pathComponentCharacterSet: CharacterSet = {
+        var characterSet = CharacterSet.urlPathAllowed
+        characterSet.remove(charactersIn: "/")
+        return characterSet
+    }()
+}