Update Ghostgram features

Swiftgram/SGWebAppExtensions/BUILD

@@ -0,0 +1,17 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+swift_library(
+    name = "SGWebAppExtensions",
+    module_name = "SGWebAppExtensions",
+    srcs = glob([
+		"Sources/**/*.swift",
+    ]),
+    copts = [
+        "-warnings-as-errors",
+    ],
+    deps = [
+    ],
+    visibility = [
+        "//visibility:public",
+    ],
+)

Swiftgram/SGWebAppExtensions/Sources/LocationHashParser.swift

@@ -0,0 +1,58 @@
+import Foundation
+
+func urlSafeDecode(_ urlencoded: String) -> String {
+    return urlencoded.replacingOccurrences(of: "+", with: "%20").removingPercentEncoding ?? urlencoded
+}
+
+public func urlParseHashParams(_ locationHash: String) -> [String: String?] {
+    var params = [String: String?]()
+    var localLocationHash = locationHash.removePrefix("#") // Remove leading '#'
+
+    if localLocationHash.isEmpty {
+        return params
+    }
+    
+    if !localLocationHash.contains("=") && !localLocationHash.contains("?") {
+        params["_path"] = urlSafeDecode(localLocationHash)
+        return params
+    }
+
+    let qIndex = localLocationHash.firstIndex(of: "?")
+    if let qIndex = qIndex {
+        let pathParam = String(localLocationHash[..<qIndex])
+        params["_path"] = urlSafeDecode(pathParam)
+        localLocationHash = String(localLocationHash[localLocationHash.index(after: qIndex)...])
+    }
+
+    let queryParams = urlParseQueryString(localLocationHash)
+    for (k, v) in queryParams {
+        params[k] = v
+    }
+
+    return params
+}
+
+func urlParseQueryString(_ queryString: String) -> [String: String?] {
+    var params = [String: String?]()
+    
+    if queryString.isEmpty {
+        return params
+    }
+    
+    let queryStringParams = queryString.split(separator: "&")
+    for param in queryStringParams {
+        let parts = param.split(separator: "=", maxSplits: 1, omittingEmptySubsequences: false)
+        let paramName = urlSafeDecode(String(parts[0]))
+        let paramValue = parts.count > 1 ? urlSafeDecode(String(parts[1])) : nil
+        params[paramName] = paramValue
+    }
+    
+    return params
+}
+
+extension String {
+    func removePrefix(_ prefix: String) -> String {
+        guard self.hasPrefix(prefix) else { return self }
+        return String(self.dropFirst(prefix.count))
+    }
+}