Add an iOS setting for the user's name or nickname

Used for comments added to documents by the user.

The setting, like templateListURL, can be set through a mobile device
management system.

There is no trivial way on iOS for an app to programmatically find out
the name of the user, and that is good from a privacy point of view.

Fixes https://github.com/CollaboraOnline/online/issues/1843

Change-Id: Ie68fcbacf886ec8f1c74021a71879b38d4180c15
Signed-off-by: Tor Lillqvist <tml@collabora.com>

ios/Mobile/AppDelegate.mm

@@ -279,6 +279,17 @@ static void updateTemplates(NSData *data, NSURLResponse *response)
         }
     }
 
+    // Also look for managed configuration setting of the user name.
+
+    if (managedConfig != nil) {
+        NSString *userName = managedConfig[@"userName"];
+        if (userName != nil && [userName isKindOfClass:[NSString class]])
+            user_name = [userName UTF8String];
+    }
+
+    if (user_name == nullptr)
+        user_name = [[[NSUserDefaults standardUserDefaults] stringForKey:@"userName"] UTF8String];
+
     fakeSocketSetLoggingCallback([](const std::string& line)
                                  {
                                      LOG_INF_NOFILE(line);

ios/Mobile/Resources/Settings.bundle/Root.plist.in

@@ -46,6 +46,14 @@
 			<key>Key</key>
 			<string>templateListURL</string>
 		</dict>
+		<dict>
+			<key>Type</key>
+			<string>PSTextFieldSpecifier</string>
+			<key>Title</key>
+			<string>Your name</string>
+			<key>Key</key>
+			<string>userName</string>
+		</dict>
 	</array>
 </dict>
 </plist>

ios/ios.h

@@ -7,6 +7,8 @@
 
 #include <LibreOfficeKit/LibreOfficeKit.hxx>
 
+extern const char *user_name;
+
 extern int loolwsd_server_socket_fd;
 
 extern LibreOfficeKit *lo_kit;

ios/ios.mm

@@ -13,6 +13,8 @@ extern "C" {
 #import <native-code.h>
 }
 
+const char *user_name = nullptr;
+
 int loolwsd_server_socket_fd = -1;
 
 LibreOfficeKit *lo_kit;

wsd/Storage.cpp

@@ -52,6 +52,10 @@
 #include <common/FileUtil.hpp>
 #include <common/JsonUtil.hpp>
 
+#ifdef IOS
+#include <ios.h>
+#endif
+
 bool StorageBase::FilesystemEnabled;
 bool StorageBase::WopiEnabled;
 bool StorageBase::SSLAsScheme = true;
@@ -300,8 +304,17 @@ std::unique_ptr<LocalStorage::LocalFileInfo> LocalStorage::getLocalFileInfo()
 
     // Set automatic userid and username.
     const std::string userId = std::to_string(LastLocalStorageId++);
+    std::string userNameString;
+
+#ifdef IOS
+    if (user_name != nullptr)
+        userNameString = std::string(user_name);
+#endif
+    if (userNameString.size() == 0)
+        userNameString = "LocalUser#" + userId;
+
     return std::unique_ptr<LocalStorage::LocalFileInfo>(
-        new LocalFileInfo("LocalUser" + userId, "LocalUser#" + userId));
+        new LocalFileInfo({"LocalUser" + userId, userNameString}));
 }
 
 std::string LocalStorage::downloadStorageFileToLocal(const Authorization& /*auth*/,