Add file provider init code

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

.gitignore

@@ -88,6 +88,7 @@ dlldata.c
 # macOS specific
 xcuserdata/
 **/.DS_Store
+**/Carthage/
 
 # Visual C++ cache files
 ipch/

shell_integration/MacOSX/CMakeLists.txt

@@ -15,12 +15,26 @@ if(APPLE)
     "OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX=${SOCKETAPI_TEAM_IDENTIFIER_PREFIX}"
     COMMENT building Mac Overlay icons
     VERBATIM)
-  add_dependencies(mac_overlayplugin nextcloud) # for the ownCloud.icns to be generated
+
+  add_custom_target( mac_fileproviderplugin ALL
+    xcodebuild ARCHS=${CMAKE_OSX_ARCHITECTURES} ONLY_ACTIVE_ARCH=NO
+    -project ${CMAKE_SOURCE_DIR}/shell_integration/MacOSX/OwnCloudFinderSync/OwnCloudFinderSync.xcodeproj
+    -target FileProviderExt -configuration Release "SYMROOT=${CMAKE_CURRENT_BINARY_DIR}"
+    "OC_APPLICATION_NAME=${APPLICATION_NAME}"
+    "OC_APPLICATION_REV_DOMAIN=${APPLICATION_REV_DOMAIN}"
+    "OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX=${SOCKETAPI_TEAM_IDENTIFIER_PREFIX}"
+    COMMENT building macOS File Provider extension
+    VERBATIM)
+
+  add_dependencies(mac_overlayplugin mac_fileproviderplugin nextcloud) # for the ownCloud.icns to be generated
 
   if (BUILD_OWNCLOUD_OSX_BUNDLE)
     install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Release/FinderSyncExt.appex
       DESTINATION ${OWNCLOUD_OSX_BUNDLE}/Contents/PlugIns
       USE_SOURCE_PERMISSIONS)
+    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Release/FileProviderExt.appex
+      DESTINATION ${OWNCLOUD_OSX_BUNDLE}/Contents/PlugIns
+      USE_SOURCE_PERMISSIONS)
   endif()
 endif()
 

shell_integration/MacOSX/OwnCloudFinderSync/FileProviderExt/FileProviderEnumerator.swift

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+import FileProvider
+
+class FileProviderEnumerator: NSObject, NSFileProviderEnumerator {
+    
+    private let enumeratedItemIdentifier: NSFileProviderItemIdentifier
+    private let anchor = NSFileProviderSyncAnchor("an anchor".data(using: .utf8)!)
+    
+    init(enumeratedItemIdentifier: NSFileProviderItemIdentifier) {
+        self.enumeratedItemIdentifier = enumeratedItemIdentifier
+        super.init()
+    }
+
+    func invalidate() {
+        // TODO: perform invalidation of server connection if necessary
+    }
+
+    func enumerateItems(for observer: NSFileProviderEnumerationObserver, startingAt page: NSFileProviderPage) {
+        /* TODO:
+         - inspect the page to determine whether this is an initial or a follow-up request
+         
+         If this is an enumerator for a directory, the root container or all directories:
+         - perform a server request to fetch directory contents
+         If this is an enumerator for the active set:
+         - perform a server request to update your local database
+         - fetch the active set from your local database
+         
+         - inform the observer about the items returned by the server (possibly multiple times)
+         - inform the observer that you are finished with this page
+         */
+        observer.didEnumerate([FileProviderItem(identifier: NSFileProviderItemIdentifier("a file"))])
+        observer.finishEnumerating(upTo: nil)
+    }
+    
+    func enumerateChanges(for observer: NSFileProviderChangeObserver, from anchor: NSFileProviderSyncAnchor) {
+        /* TODO:
+         - query the server for updates since the passed-in sync anchor
+         
+         If this is an enumerator for the active set:
+         - note the changes in your local database
+         
+         - inform the observer about item deletions and updates (modifications + insertions)
+         - inform the observer when you have finished enumerating up to a subsequent sync anchor
+         */
+        observer.finishEnumeratingChanges(upTo: anchor, moreComing: false)
+    }
+
+    func currentSyncAnchor(completionHandler: @escaping (NSFileProviderSyncAnchor?) -> Void) {
+        completionHandler(anchor)
+    }
+}

shell_integration/MacOSX/OwnCloudFinderSync/FileProviderExt/FileProviderExt.entitlements

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.application-identifier</key>
+	<string>$(AppIdentifierPrefix)$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>$(OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX)$(OC_APPLICATION_REV_DOMAIN)</string>
+	</array>
+</dict>
+</plist>

shell_integration/MacOSX/OwnCloudFinderSync/FileProviderExt/FileProviderExtension.swift

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022 by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+import FileProvider
+
+class FileProviderExtension: NSObject, NSFileProviderReplicatedExtension {
+    required init(domain: NSFileProviderDomain) {
+        // TODO: The containing application must create a domain using `NSFileProviderManager.add(_:, completionHandler:)`. The system will then launch the application extension process, call `FileProviderExtension.init(domain:)` to instantiate the extension for that domain, and call methods on the instance.
+        super.init()
+    }
+    
+    func invalidate() {
+        // TODO: cleanup any resources
+    }
+    
+    func item(for identifier: NSFileProviderItemIdentifier, request: NSFileProviderRequest, completionHandler: @escaping (NSFileProviderItem?, Error?) -> Void) -> Progress {
+        // resolve the given identifier to a record in the model
+        
+        // TODO: implement the actual lookup
+
+        completionHandler(FileProviderItem(identifier: identifier), nil)
+        return Progress()
+    }
+    
+    func fetchContents(for itemIdentifier: NSFileProviderItemIdentifier, version requestedVersion: NSFileProviderItemVersion?, request: NSFileProviderRequest, completionHandler: @escaping (URL?, NSFileProviderItem?, Error?) -> Void) -> Progress {
+        // TODO: implement fetching of the contents for the itemIdentifier at the specified version
+        
+        completionHandler(nil, nil, NSError(domain: NSCocoaErrorDomain, code: NSFeatureUnsupportedError, userInfo:[:]))
+        return Progress()
+    }
+    
+    func createItem(basedOn itemTemplate: NSFileProviderItem, fields: NSFileProviderItemFields, contents url: URL?, options: NSFileProviderCreateItemOptions = [], request: NSFileProviderRequest, completionHandler: @escaping (NSFileProviderItem?, NSFileProviderItemFields, Bool, Error?) -> Void) -> Progress {
+        // TODO: a new item was created on disk, process the item's creation
+        
+        completionHandler(itemTemplate, [], false, nil)
+        return Progress()
+    }
+    
+    func modifyItem(_ item: NSFileProviderItem, baseVersion version: NSFileProviderItemVersion, changedFields: NSFileProviderItemFields, contents newContents: URL?, options: NSFileProviderModifyItemOptions = [], request: NSFileProviderRequest, completionHandler: @escaping (NSFileProviderItem?, NSFileProviderItemFields, Bool, Error?) -> Void) -> Progress {
+        // TODO: an item was modified on disk, process the item's modification
+        
+        completionHandler(nil, [], false, NSError(domain: NSCocoaErrorDomain, code: NSFeatureUnsupportedError, userInfo:[:]))
+        return Progress()
+    }
+    
+    func deleteItem(identifier: NSFileProviderItemIdentifier, baseVersion version: NSFileProviderItemVersion, options: NSFileProviderDeleteItemOptions = [], request: NSFileProviderRequest, completionHandler: @escaping (Error?) -> Void) -> Progress {
+        // TODO: an item was deleted on disk, process the item's deletion
+        
+        completionHandler(NSError(domain: NSCocoaErrorDomain, code: NSFeatureUnsupportedError, userInfo:[:]))
+        return Progress()
+    }
+    
+    func enumerator(for containerItemIdentifier: NSFileProviderItemIdentifier, request: NSFileProviderRequest) throws -> NSFileProviderEnumerator {
+        return FileProviderEnumerator(enumeratedItemIdentifier: containerItemIdentifier)
+    }
+}

shell_integration/MacOSX/OwnCloudFinderSync/FileProviderExt/FileProviderItem.swift

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+import FileProvider
+import UniformTypeIdentifiers
+
+class FileProviderItem: NSObject, NSFileProviderItem {
+
+    // TODO: implement an initializer to create an item from your extension's backing model
+    // TODO: implement the accessors to return the values from your extension's backing model
+    
+    private let identifier: NSFileProviderItemIdentifier
+    
+    init(identifier: NSFileProviderItemIdentifier) {
+        self.identifier = identifier
+    }
+    
+    var itemIdentifier: NSFileProviderItemIdentifier {
+        return identifier
+    }
+    
+    var parentItemIdentifier: NSFileProviderItemIdentifier {
+        return .rootContainer
+    }
+    
+    var capabilities: NSFileProviderItemCapabilities {
+        return [.allowsReading, .allowsWriting, .allowsRenaming, .allowsReparenting, .allowsTrashing, .allowsDeleting]
+    }
+    
+    var itemVersion: NSFileProviderItemVersion {
+        NSFileProviderItemVersion(contentVersion: "a content version".data(using: .utf8)!, metadataVersion: "a metadata version".data(using: .utf8)!)
+    }
+    
+    var filename: String {
+        return identifier.rawValue
+    }
+    
+    var contentType: UTType {
+        return identifier == NSFileProviderItemIdentifier.rootContainer ? .folder : .plainText
+    }
+}

shell_integration/MacOSX/OwnCloudFinderSync/FileProviderExt/Info.plist

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionFileProviderDocumentGroup</key>
+		<string>$(OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX)$(OC_APPLICATION_REV_DOMAIN)</string>
+		<key>NSExtensionFileProviderSupportsEnumeration</key>
+		<true/>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.fileprovider-nonui</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).FileProviderExtension</string>
+	</dict>
+</dict>
+</plist>

shell_integration/MacOSX/OwnCloudFinderSync/FinderSyncExt/Info.plist

@@ -2,8 +2,6 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>SocketApiPrefix</key>
-	<string>$(OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX)$(OC_APPLICATION_REV_DOMAIN)</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleDisplayName</key>
@@ -39,5 +37,7 @@
 	</dict>
 	<key>NSPrincipalClass</key>
 	<string>NSApplication</string>
+	<key>SocketApiPrefix</key>
+	<string>$(OC_SOCKETAPI_TEAM_IDENTIFIER_PREFIX)$(OC_APPLICATION_REV_DOMAIN)</string>
 </dict>
 </plist>

shell_integration/MacOSX/OwnCloudFinderSync/OwnCloudFinderSync.xcodeproj/project.pbxproj

@@ -7,6 +7,11 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		538E396A27F4765000FA63D5 /* UniformTypeIdentifiers.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 538E396927F4765000FA63D5 /* UniformTypeIdentifiers.framework */; };
+		538E396D27F4765000FA63D5 /* FileProviderExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 538E396C27F4765000FA63D5 /* FileProviderExtension.swift */; };
+		538E396F27F4765000FA63D5 /* FileProviderItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 538E396E27F4765000FA63D5 /* FileProviderItem.swift */; };
+		538E397127F4765000FA63D5 /* FileProviderEnumerator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 538E397027F4765000FA63D5 /* FileProviderEnumerator.swift */; };
+		538E397627F4765000FA63D5 /* FileProviderExt.appex in Embed App Extensions */ = {isa = PBXBuildFile; fileRef = 538E396727F4765000FA63D5 /* FileProviderExt.appex */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
 		539158AC27BE71A900816F56 /* LineProcessor.m in Sources */ = {isa = PBXBuildFile; fileRef = 539158AB27BE71A900816F56 /* LineProcessor.m */; };
 		539158B327BEC98A00816F56 /* LocalSocketClient.m in Sources */ = {isa = PBXBuildFile; fileRef = 539158B227BEC98A00816F56 /* LocalSocketClient.m */; };
 		C2B573BA1B1CD91E00303B36 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = C2B573B91B1CD91E00303B36 /* main.m */; };
@@ -21,6 +26,13 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		538E397427F4765000FA63D5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = C2B573951B1CD88000303B36 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 538E396627F4765000FA63D5;
+			remoteInfo = FileProviderExt;
+		};
 		C2B573DF1B1CD9CE00303B36 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = C2B573951B1CD88000303B36 /* Project object */;
@@ -38,6 +50,7 @@
 			dstSubfolderSpec = 13;
 			files = (
 				C2B573E21B1CD9CE00303B36 /* FinderSyncExt.appex in Embed App Extensions */,
+				538E397627F4765000FA63D5 /* FileProviderExt.appex in Embed App Extensions */,
 			);
 			name = "Embed App Extensions";
 			runOnlyForDeploymentPostprocessing = 1;
@@ -45,6 +58,13 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		538E396727F4765000FA63D5 /* FileProviderExt.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = FileProviderExt.appex; sourceTree = BUILT_PRODUCTS_DIR; };
+		538E396927F4765000FA63D5 /* UniformTypeIdentifiers.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = UniformTypeIdentifiers.framework; path = System/Library/Frameworks/UniformTypeIdentifiers.framework; sourceTree = SDKROOT; };
+		538E396C27F4765000FA63D5 /* FileProviderExtension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileProviderExtension.swift; sourceTree = "<group>"; };
+		538E396E27F4765000FA63D5 /* FileProviderItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileProviderItem.swift; sourceTree = "<group>"; };
+		538E397027F4765000FA63D5 /* FileProviderEnumerator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileProviderEnumerator.swift; sourceTree = "<group>"; };
+		538E397227F4765000FA63D5 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		538E397327F4765000FA63D5 /* FileProviderExt.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = FileProviderExt.entitlements; sourceTree = "<group>"; };
 		539158A927BE606500816F56 /* LineProcessor.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = LineProcessor.h; sourceTree = "<group>"; };
 		539158AA27BE67CC00816F56 /* SyncClient.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SyncClient.h; sourceTree = "<group>"; };
 		539158AB27BE71A900816F56 /* LineProcessor.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = LineProcessor.m; sourceTree = "<group>"; };
@@ -66,6 +86,14 @@
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		538E396427F4765000FA63D5 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				538E396A27F4765000FA63D5 /* UniformTypeIdentifiers.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		C2B573AE1B1CD91E00303B36 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -83,11 +111,33 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		538E396827F4765000FA63D5 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				538E396927F4765000FA63D5 /* UniformTypeIdentifiers.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		538E396B27F4765000FA63D5 /* FileProviderExt */ = {
+			isa = PBXGroup;
+			children = (
+				538E396C27F4765000FA63D5 /* FileProviderExtension.swift */,
+				538E396E27F4765000FA63D5 /* FileProviderItem.swift */,
+				538E397027F4765000FA63D5 /* FileProviderEnumerator.swift */,
+				538E397227F4765000FA63D5 /* Info.plist */,
+				538E397327F4765000FA63D5 /* FileProviderExt.entitlements */,
+			);
+			path = FileProviderExt;
+			sourceTree = "<group>";
+		};
 		C2B573941B1CD88000303B36 = {
 			isa = PBXGroup;
 			children = (
 				C2B573B31B1CD91E00303B36 /* desktopclient */,
 				C2B573D81B1CD9CE00303B36 /* FinderSyncExt */,
+				538E396B27F4765000FA63D5 /* FileProviderExt */,
+				538E396827F4765000FA63D5 /* Frameworks */,
 				C2B573B21B1CD91E00303B36 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -97,6 +147,7 @@
 			children = (
 				C2B573B11B1CD91E00303B36 /* desktopclient.app */,
 				C2B573D71B1CD9CE00303B36 /* FinderSyncExt.appex */,
+				538E396727F4765000FA63D5 /* FileProviderExt.appex */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -150,6 +201,25 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		538E396627F4765000FA63D5 /* FileProviderExt */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 538E397927F4765000FA63D5 /* Build configuration list for PBXNativeTarget "FileProviderExt" */;
+			buildPhases = (
+				538E396327F4765000FA63D5 /* Sources */,
+				538E396427F4765000FA63D5 /* Frameworks */,
+				538E396527F4765000FA63D5 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = FileProviderExt;
+			packageProductDependencies = (
+			);
+			productName = FileProviderExt;
+			productReference = 538E396727F4765000FA63D5 /* FileProviderExt.appex */;
+			productType = "com.apple.product-type.app-extension";
+		};
 		C2B573B01B1CD91E00303B36 /* desktopclient */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = C2B573CC1B1CD91E00303B36 /* Build configuration list for PBXNativeTarget "desktopclient" */;
@@ -163,6 +233,7 @@
 			);
 			dependencies = (
 				C2B573E01B1CD9CE00303B36 /* PBXTargetDependency */,
+				538E397527F4765000FA63D5 /* PBXTargetDependency */,
 			);
 			name = desktopclient;
 			productName = desktopclient;
@@ -193,8 +264,13 @@
 		C2B573951B1CD88000303B36 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				LastSwiftUpdateCheck = 1330;
 				LastUpgradeCheck = 1240;
 				TargetAttributes = {
+					538E396627F4765000FA63D5 = {
+						CreatedOnToolsVersion = 13.3;
+						ProvisioningStyle = Manual;
+					};
 					C2B573B01B1CD91E00303B36 = {
 						CreatedOnToolsVersion = 6.3.1;
 						DevelopmentTeam = 9B5WD74GWJ;
@@ -222,17 +298,27 @@
 				Base,
 			);
 			mainGroup = C2B573941B1CD88000303B36;
+			packageReferences = (
+			);
 			productRefGroup = C2B573B21B1CD91E00303B36 /* Products */;
 			projectDirPath = "";
 			projectRoot = "";
 			targets = (
 				C2B573B01B1CD91E00303B36 /* desktopclient */,
 				C2B573D61B1CD9CE00303B36 /* FinderSyncExt */,
+				538E396627F4765000FA63D5 /* FileProviderExt */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXResourcesBuildPhase section */
+		538E396527F4765000FA63D5 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		C2B573AF1B1CD91E00303B36 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -273,6 +359,16 @@
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		538E396327F4765000FA63D5 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				538E396D27F4765000FA63D5 /* FileProviderExtension.swift in Sources */,
+				538E396F27F4765000FA63D5 /* FileProviderItem.swift in Sources */,
+				538E397127F4765000FA63D5 /* FileProviderEnumerator.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		C2B573AD1B1CD91E00303B36 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -294,6 +390,11 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		538E397527F4765000FA63D5 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 538E396627F4765000FA63D5 /* FileProviderExt */;
+			targetProxy = 538E397427F4765000FA63D5 /* PBXContainerItemProxy */;
+		};
 		C2B573E01B1CD9CE00303B36 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = C2B573D61B1CD9CE00303B36 /* FinderSyncExt */;
@@ -302,6 +403,103 @@
 /* End PBXTargetDependency section */
 
 /* Begin XCBuildConfiguration section */
+		538E397727F4765000FA63D5 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_ENTITLEMENTS = FileProviderExt/FileProviderExt.entitlements;
+				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_STYLE = Manual;
+				COPY_PHASE_STRIP = NO;
+				CURRENT_PROJECT_VERSION = 1;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEVELOPMENT_TEAM = "";
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = FileProviderExt/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = FileProviderExt;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @executable_path/../../../../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = 12.3;
+				MARKETING_VERSION = 1.0;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = com.owncloud.desktopclient.FileProviderExt;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
+				SDKROOT = macosx;
+				SKIP_INSTALL = YES;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+			};
+			name = Debug;
+		};
+		538E397827F4765000FA63D5 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_ENTITLEMENTS = FileProviderExt/FileProviderExt.entitlements;
+				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_STYLE = Manual;
+				COPY_PHASE_STRIP = NO;
+				CURRENT_PROJECT_VERSION = 1;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				DEVELOPMENT_TEAM = "";
+				ENABLE_NS_ASSERTIONS = NO;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = FileProviderExt/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = FileProviderExt;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @executable_path/../../../../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = 12.3;
+				MARKETING_VERSION = 1.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = com.owncloud.desktopclient.FileProviderExt;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
+				SDKROOT = macosx;
+				SKIP_INSTALL = YES;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
+			};
+			name = Release;
+		};
 		C2B573991B1CD88000303B36 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -370,6 +568,7 @@
 		C2B573CD1B1CD91E00303B36 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
@@ -414,12 +613,16 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
 				SDKROOT = macosx;
+				SWIFT_OBJC_BRIDGING_HEADER = "desktopclient/desktopclient-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
 		C2B573CE1B1CD91E00303B36 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
@@ -457,6 +660,8 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
 				SDKROOT = macosx;
+				SWIFT_OBJC_BRIDGING_HEADER = "desktopclient/desktopclient-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -567,6 +772,15 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		538E397927F4765000FA63D5 /* Build configuration list for PBXNativeTarget "FileProviderExt" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				538E397727F4765000FA63D5 /* Debug */,
+				538E397827F4765000FA63D5 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		C2B573981B1CD88000303B36 /* Build configuration list for PBXProject "OwnCloudFinderSync" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

shell_integration/MacOSX/OwnCloudFinderSync/OwnCloudFinderSync.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

shell_integration/MacOSX/OwnCloudFinderSync/OwnCloudFinderSync.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

src/gui/CMakeLists.txt

@@ -280,6 +280,7 @@ endif()
 IF( APPLE )
     list(APPEND client_SRCS cocoainitializer_mac.mm)
     list(APPEND client_SRCS systray.mm)
+    list(APPEND client_SRCS fileprovider_mac.mm)
 
     if(SPARKLE_FOUND AND BUILD_UPDATER)
         # Define this, we need to check in updater.cpp
@@ -653,7 +654,7 @@ endif()
 
 if (APPLE)
     find_package(Qt5 COMPONENTS MacExtras)
-    target_link_libraries(nextcloudCore PUBLIC Qt5::MacExtras "-framework UserNotifications")
+    target_link_libraries(nextcloudCore PUBLIC Qt5::MacExtras "-framework UserNotifications FileProvider")
 endif()
 
 if(WITH_CRASHREPORTER)

src/gui/fileprovider.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef FILEPROVIDER_H
+#define FILEPROVIDER_H
+
+namespace OCC {
+namespace Mac {
+
+    class FileProviderInitializer
+    {
+    public:
+        FileProviderInitializer();
+        ~FileProviderInitializer();
+
+    private:
+        class Private;
+        Private *d;
+    };
+
+} // namespace Mac
+} // namespace OCC
+
+#endif

src/gui/fileprovider_mac.mm

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+
+#import <Foundation/Foundation.h>
+#import <FileProvider/FileProvider.h>
+
+#include "application.h"
+#include "fileprovider.h"
+
+namespace OCC {
+namespace Mac {
+
+class FileProviderInitializer::Private {
+  public:
+    Private() {
+        domainIdentifier = @APPLICATION_REV_DOMAIN;
+        name = @APPLICATION_NAME;
+        fileProviderDomain = [[NSFileProviderDomain alloc] initWithIdentifier:domainIdentifier displayName:name];
+        setupFileProvider();
+    }
+
+    ~Private() = default;
+
+    void setupFileProvider() {
+        [NSFileProviderManager addDomain:fileProviderDomain completionHandler:^(NSError *error) {
+            if(error) {
+                NSLog(@"Add file provider domain: %i %@", [error code], [error localizedDescription]);
+            }
+        }];
+    }
+
+    void removeFileProvider() {
+        [NSFileProviderManager removeDomain:fileProviderDomain completionHandler:^(NSError *error) {
+            if(error) {
+                NSLog(@"Remove file provider domain: %i %@", [error code], [error localizedDescription]);
+            }
+        }];
+    }
+
+    NSFileProviderDomainIdentifier domainIdentifier;
+    NSString *name;
+    NSFileProviderDomain *fileProviderDomain;
+};
+
+FileProviderInitializer::FileProviderInitializer() {
+    d = new FileProviderInitializer::Private();
+    d->setupFileProvider();
+}
+
+FileProviderInitializer::~FileProviderInitializer() {
+    d->removeFileProvider();
+    delete d;
+}
+
+} // namespace Mac
+} // namespace OCC

src/gui/main.cpp

@@ -22,6 +22,10 @@
 #include <sys/resource.h>
 #endif
 
+#ifdef Q_OS_MACOS
+#include "fileprovider.h"
+#endif
+
 #include "application.h"
 #include "cocoainitializer.h"
 #include "theme.h"
@@ -74,6 +78,7 @@ int main(int argc, char **argv)
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
 #ifdef Q_OS_MAC
     Mac::CocoaInitializer cocoaInit; // RIIA
+    Mac::FileProviderInitializer fileProviderInit;
 #endif
 
     auto surfaceFormat = QSurfaceFormat::defaultFormat();