Exporting: Export to zip in a background thread

Signed-off-by: Roopesh Chander <roop@roopc.net>
2018-11-15 13:39:56 +05:30
parent 1dac181803
commit 6bb25782c1
2 changed files with 32 additions and 23 deletions
@@ -8,21 +8,30 @@ enum ZipExporterError: Error {
 }

 class ZipExporter {
-    static func exportConfigFiles(tunnelConfigurations: [TunnelConfiguration], to destinationURL: URL) throws {
+    static func exportConfigFiles(tunnelConfigurations: [TunnelConfiguration], to url: URL, completion: @escaping (Error?) -> Void)  {

-        guard (!tunnelConfigurations.isEmpty) else { throw ZipExporterError.noTunnelsToExport }
-
-        var inputsToArchiver: [(fileName: String, contents: Data)] = []
-
-        var lastTunnelName: String = ""
-        for tunnelConfiguration in tunnelConfigurations {
-            if let contents = WgQuickConfigFileWriter.writeConfigFile(from: tunnelConfiguration) {
-                let name = tunnelConfiguration.interface.name
-                if (name.isEmpty || name == lastTunnelName) { continue }
-                inputsToArchiver.append((fileName: "\(name).conf", contents: contents))
-                lastTunnelName = name
+        guard (!tunnelConfigurations.isEmpty) else {
+            completion(ZipExporterError.noTunnelsToExport)
+            return
+        }
+        DispatchQueue.global(qos: .userInitiated).async {
+            var inputsToArchiver: [(fileName: String, contents: Data)] = []
+            var lastTunnelName: String = ""
+            for tunnelConfiguration in tunnelConfigurations {
+                if let contents = WgQuickConfigFileWriter.writeConfigFile(from: tunnelConfiguration) {
+                    let name = tunnelConfiguration.interface.name
+                    if (name.isEmpty || name == lastTunnelName) { continue }
+                    inputsToArchiver.append((fileName: "\(name).conf", contents: contents))
+                    lastTunnelName = name
+                }
            }
+            do {
+                try ZipArchive.archive(inputs: inputsToArchiver, to: url)
+            } catch (let e) {
+                DispatchQueue.main.async { completion(e) }
+                return
+            }
+            DispatchQueue.main.async { completion(nil) }
        }
-        try ZipArchive.archive(inputs: inputsToArchiver, to: destinationURL)
    }
 }