Importing: Refactor out zip importing into a separate class

Signed-off-by: Roopesh Chander <roop@roopc.net>

1 files changed, 48 insertions, 0 deletions

diff --git a/WireGuard/WireGuard/ZipArchive/ZipImporter.swift b/WireGuard/WireGuard/ZipArchive/ZipImporter.swift
new file mode 100644
index 0000000..7ee5c32
--- /dev/null
+++ b/WireGuard/WireGuard/ZipArchive/ZipImporter.swift
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+import UIKit
+
+enum ZipImporterError: Error {
+    case noTunnelsInZipArchive
+}
+
+class ZipImporter {
+    let url: URL
+    init(url: URL) {
+        self.url = url
+    }
+
+    func importConfigFiles() throws -> [TunnelConfiguration?] {
+        var unarchivedFiles: [(fileName: String, contents: Data)] = try ZipArchive.unarchive(url: url, requiredFileExtensions: ["conf"])
+
+        for (i, unarchivedFile) in unarchivedFiles.enumerated().reversed() {
+            let fileBaseName = URL(string: unarchivedFile.fileName)?.deletingPathExtension().lastPathComponent
+            if let trimmedName = fileBaseName?.trimmingCharacters(in: .whitespacesAndNewlines), !trimmedName.isEmpty {
+                unarchivedFiles[i].fileName = trimmedName
+            } else {
+                unarchivedFiles.remove(at: i)
+            }
+        }
+
+        if (unarchivedFiles.isEmpty) {
+            throw ZipImporterError.noTunnelsInZipArchive
+        }
+
+        unarchivedFiles.sort { $0.fileName < $1.fileName }
+        var configs = Array<TunnelConfiguration?>(repeating: nil, count: unarchivedFiles.count)
+        for (i, file) in unarchivedFiles.enumerated() {
+            if (i > 0 && file == unarchivedFiles[i - 1]) {
+                continue
+            }
+            guard let fileContents = String(data: file.contents, encoding: .utf8) else {
+                continue
+            }
+            guard let tunnelConfig = try? WgQuickConfigFileParser.parse(fileContents, name: file.fileName) else {
+                continue
+            }
+            configs[i] = tunnelConfig
+        }
+        return configs
+    }
+}