Merge pull request #373 from RocketChat/feature/validate_server_versi…

…on.352

Validate server version and alert user when user tries to connect to it

Podfile

@@ -11,6 +11,7 @@ def shared_pods
 
   # Code utilities
   pod 'SwiftyJSON'
+  pod 'semver'
 
   # UI
   pod 'SideMenuController'

Podfile.lock

@@ -52,6 +52,7 @@ PODS:
   - SDWebImage (3.8.2):
     - SDWebImage/Core (= 3.8.2)
   - SDWebImage/Core (3.8.2)
+  - semver (1.0.0)
   - SideMenuController (0.2.4)
   - SlackTextViewController (1.9.5)
   - Starscream (2.0.3)
@@ -69,6 +70,7 @@ DEPENDENCIES:
   - NVActivityIndicatorView
   - RealmSwift
   - SDWebImage (~> 3.8)
+  - semver
   - SideMenuController
   - SlackTextViewController
   - Starscream (~> 2.0.0)
@@ -95,13 +97,14 @@ SPEC CHECKSUMS:
   Realm: d27b758e12d62a3371879a065d4c40aa212c5a54
   RealmSwift: 9556c0fe0f0cfecacfb755ae9e68ff379fc6bead
   SDWebImage: 098e97e6176540799c27e804c96653ee0833d13c
+  semver: efe6bf4af25bffab18d442592771be392210b5ce
   SideMenuController: b463d2b3aa58e2afe57f57a07938fa9a647894ca
   SlackTextViewController: fbcdadbb8090673f604484ff5b6eb8d77baed42a
   Starscream: 3fdd5c277e57cca6b5c406d274e3f34a7c88f2ce
   SwiftyJSON: c2842d878f95482ffceec5709abc3d05680c0220
   TSMarkdownParser: 114779f14d46e7fc6d9880d4797e5abcc01f92c3
   URBMediaFocusViewController: 26779e301fe75ec0152fbe8b476bd06ccee9f9b3
 
-PODFILE CHECKSUM: ddb7c3e672b9fde92752fcd4b57fa8a2c6116722
+PODFILE CHECKSUM: ba9d77b7ee1abf5cb7a1edf9ef743f9b8dfefe5c
 
 COCOAPODS: 1.1.1

Rocket.Chat/Controllers/Auth/ConnectServerViewController.swift

@@ -8,6 +8,7 @@
 
 import UIKit
 import SwiftyJSON
+import semver
 
 final class ConnectServerViewController: BaseViewController {
 
@@ -149,10 +150,25 @@ final class ConnectServerViewController: BaseViewController {
                 let json = JSON(data: data)
                 Log.debug(json.rawString())
 
-                guard json["version"].string != nil else {
+                guard let version = json["version"].string else {
                     return completion(nil, true)
                 }
 
+                if let minVersion = Bundle.main.object(forInfoDictionaryKey: "RC_MIN_SERVER_VERSION") as? String {
+                    if Semver.lt(version, minVersion) {
+                        let alert = UIAlertController(
+                            title: localized("alert.connection.invalid_version.title"),
+                            message: String(format: localized("alert.connection.invalid_version.message"), version, minVersion),
+                            preferredStyle: .alert
+                        )
+
+                        alert.addAction(UIAlertAction(title: localized("global.ok"), style: .default, handler: nil))
+                        self.present(alert, animated: true, completion: nil)
+
+                        return completion(nil, true)
+                    }
+                }
+
                 completion(json, false)
             } else {
                 completion(nil, true)

Rocket.Chat/Info.plist

@@ -95,5 +95,7 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<true/>
+	<key>RC_MIN_SERVER_VERSION</key>
+	<string>0.54.0</string>
 </dict>
 </plist>

Rocket.Chat/en.lproj/Localizable.strings

@@ -19,6 +19,9 @@
 "alert.connection.invalid_url.title" = "Oops!";
 "alert.connection.invalid_url.message" = "The URL you entered is invalid. Check it and try again, please!";
 
+"alert.connection.invalid_version.title" = "Oops!";
+"alert.connection.invalid_version.message" = "The server you're trying to connect is using a version that's not supported by the app anymore: %@.\n\nWe require version %@.";
+
 // Socket Connection
 "connection.offline.banner.message" = "You're offline, try connecting again";