Update Ghostgram features

Swiftgram/SGRequests/BUILD

@@ -0,0 +1,18 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+swift_library(
+    name = "SGRequests",
+    module_name = "SGRequests",
+    srcs = glob([
+        "Sources/**/*.swift",
+    ]),
+    copts = [
+        "-warnings-as-errors",
+    ],
+    deps = [
+        "//submodules/SSignalKit/SwiftSignalKit:SwiftSignalKit"
+    ],
+    visibility = [
+        "//visibility:public",
+    ],
+)

Swiftgram/SGRequests/Sources/File.swift

@@ -0,0 +1,72 @@
+import Foundation
+import SwiftSignalKit
+
+
+public func requestsDownload(url: URL) -> Signal<(Data, URLResponse?), Error?> {
+    return Signal { subscriber in
+        let completed = Atomic<Bool>(value: false)
+
+        let downloadTask = URLSession.shared.downloadTask(with: url, completionHandler: { location, response, error in
+            let _ = completed.swap(true)
+            if let location = location, let data = try? Data(contentsOf: location) {
+                subscriber.putNext((data, response))
+                subscriber.putCompletion()
+            } else {
+                subscriber.putError(error)
+            }
+        })
+        downloadTask.resume()
+
+        return ActionDisposable {
+            if !completed.with({ $0 }) {
+                downloadTask.cancel()
+            }
+        }
+    }
+}
+
+public func requestsGet(url: URL) -> Signal<(Data, URLResponse?), Error?> {
+    return Signal { subscriber in
+        let completed = Atomic<Bool>(value: false)
+
+        let urlTask = URLSession.shared.dataTask(with: url, completionHandler: { data, response, error in
+            let _ = completed.swap(true)
+            if let strongData = data {
+                subscriber.putNext((strongData, response))
+                subscriber.putCompletion()
+            } else {
+                subscriber.putError(error)
+            }
+        })
+        urlTask.resume()
+
+        return ActionDisposable {
+            if !completed.with({ $0 }) {
+                urlTask.cancel()
+            }
+        }
+    }
+}
+
+
+public func requestsCustom(request: URLRequest) -> Signal<(Data, URLResponse?), Error?> {
+    return Signal { subscriber in
+        let completed = Atomic<Bool>(value: false)
+        let urlTask = URLSession.shared.dataTask(with: request, completionHandler: { data, response, error in
+            _ = completed.swap(true)
+            if let strongData = data {
+                subscriber.putNext((strongData, response))
+                subscriber.putCompletion()
+            } else {
+                subscriber.putError(error)
+            }
+        })
+        urlTask.resume()
+
+        return ActionDisposable {
+            if !completed.with({ $0 }) {
+                urlTask.cancel()
+            }
+        }
+    }
+}