Add FolderMonitor for launch directories

NanoSector · Mar 13, 2021 · 1cee8a4 · 1cee8a4
1 parent 2712da7
commit 1cee8a4
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Showing 5 changed files with 103 additions and 4 deletions.
diff --git a/Brewed.xcodeproj/project.pbxproj b/Brewed.xcodeproj/project.pbxproj
@@ -15,6 +15,7 @@
 		CD6C478525FCF9E8004BA6DD /* RestartCommand.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD6C478425FCF9E8004BA6DD /* RestartCommand.swift */; };
 		CD6C478825FD0522004BA6DD /* GlobalAlert.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD6C478725FD0522004BA6DD /* GlobalAlert.swift */; };
 		CD6C478B25FD0B4F004BA6DD /* FileMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD6C478A25FD0B4F004BA6DD /* FileMonitor.swift */; };
+		CD6C479525FD4721004BA6DD /* FolderMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD6C479425FD4721004BA6DD /* FolderMonitor.swift */; };
 		CD85838725FABE8E00E3974F /* BrewedApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD85838625FABE8E00E3974F /* BrewedApp.swift */; };
 		CD85838925FABE8E00E3974F /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD85838825FABE8E00E3974F /* ContentView.swift */; };
 		CD85838B25FABE9300E3974F /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = CD85838A25FABE9300E3974F /* Assets.xcassets */; };
@@ -38,6 +39,7 @@
 		CD6C478425FCF9E8004BA6DD /* RestartCommand.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = RestartCommand.swift; sourceTree = "<group>"; };
 		CD6C478725FD0522004BA6DD /* GlobalAlert.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GlobalAlert.swift; sourceTree = "<group>"; };
 		CD6C478A25FD0B4F004BA6DD /* FileMonitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileMonitor.swift; sourceTree = "<group>"; };
+		CD6C479425FD4721004BA6DD /* FolderMonitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FolderMonitor.swift; sourceTree = "<group>"; };
 		CD85838325FABE8E00E3974F /* Brewed.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Brewed.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		CD85838625FABE8E00E3974F /* BrewedApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BrewedApp.swift; sourceTree = "<group>"; };
 		CD85838825FABE8E00E3974F /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
@@ -186,6 +188,7 @@
 				CDCCCE4925FBED2C00C3590A /* Collection.swift */,
 				CDA7929025FBFBB3006FFAB1 /* Regex.swift */,
 				CD6C478A25FD0B4F004BA6DD /* FileMonitor.swift */,
+				CD6C479425FD4721004BA6DD /* FolderMonitor.swift */,
 			);
 			path = Helpers;
 			sourceTree = "<group>";
@@ -269,6 +272,7 @@
 				CDA7928D25FBFA58006FFAB1 /* AutostartService.swift in Sources */,
 				CD6C478525FCF9E8004BA6DD /* RestartCommand.swift in Sources */,
 				CD85838725FABE8E00E3974F /* BrewedApp.swift in Sources */,
+				CD6C479525FD4721004BA6DD /* FolderMonitor.swift in Sources */,
 				CDA7928725FBEFC9006FFAB1 /* ManagedServices.swift in Sources */,
 				CD6C477125FCE2AC004BA6DD /* ServiceInfo.swift in Sources */,
 				CDCCCE4725FBE6D500C3590A /* Service.swift in Sources */,

diff --git a/Brewed/Helpers/FileMonitor.swift b/Brewed/Helpers/FileMonitor.swift
@@ -14,7 +14,7 @@ protocol FileMonitorDelegate: AnyObject {
     func fileEvent(url: URL, event: DispatchSource.FileSystemEvent)
 }
 
-final class FileMonitor {
+final class FileMonitor: FilesystemMonitor {
     let url: URL
 
     let fileHandle: FileHandle

diff --git a/Brewed/Helpers/FolderMonitor.swift b/Brewed/Helpers/FolderMonitor.swift
@@ -0,0 +1,60 @@
+//
+//  FolderMonitor.swift
+//  Brewed
+//
+//  Created by Rick Kerkhof on 13/03/2021.
+//
+//  Code found from https://swiftrocks.com/dispatchsource-detecting-changes-in-files-and-folders-in-swift
+//  and altered.
+//
+
+import Foundation
+
+protocol FolderMonitorDelegate: AnyObject {
+    func folderEvent(url: URL, event: DispatchSource.FileSystemEvent, additions: [URL])
+}
+
+protocol FilesystemMonitor {}
+
+final class FolderMonitor: FilesystemMonitor {
+    let url: URL
+
+    let fileHandle: Int32
+    let source: DispatchSourceFileSystemObject
+
+    weak var delegate: FolderMonitorDelegate?
+
+    init(url: URL) throws {
+        self.url = url
+        fileHandle = open(url.path, O_EVTONLY)
+
+        source = DispatchSource.makeFileSystemObjectSource(
+            fileDescriptor: fileHandle,
+            eventMask: .write,
+            queue: DispatchQueue.main
+        )
+
+        var contents = try FileManager.default.contentsOfDirectory(at: url, includingPropertiesForKeys: nil)
+
+        source.setEventHandler {
+            let event = self.source.data
+            let oldContents = contents
+            contents = try! FileManager.default.contentsOfDirectory(at: url, includingPropertiesForKeys: nil)
+            self.delegate?.folderEvent(
+                url: url,
+                event: event,
+                additions: contents.filter { !oldContents.contains($0) }
+            )
+        }
+
+        source.setCancelHandler {
+            close(self.fileHandle)
+        }
+
+        source.resume()
+    }
+
+    deinit {
+        source.cancel()
+    }
+}
diff --git a/Brewed/Homebrew/Services/AutostartService.swift b/Brewed/Homebrew/Services/AutostartService.swift
@@ -20,6 +20,18 @@ struct AutostartDirectory {
 
         return regex?.matches(url?.absoluteString ?? "") ?? false
     }
+
+    static func urls() -> [URL] {
+        var urls = [
+            URL(fileURLWithPath: AutostartDirectory.global, isDirectory: true)
+        ]
+
+        if let local = try? FileManager.default.url(for: .libraryDirectory, in: .userDomainMask, appropriateFor: nil, create: false) {
+            urls.append(local.appendingPathComponent("LaunchAgents"))
+        }
+
+        return urls
+    }
 }
 
 extension Service {
@@ -30,4 +42,8 @@ extension Service {
     var startsAtLogin: Bool {
         AutostartDirectory.isLocalPlist(plist)
     }
+
+    var plistName: String {
+        "homebrew.mxcl.\(self.id).plist"
+    }
 }
diff --git a/Brewed/Model/ManagedServices.swift b/Brewed/Model/ManagedServices.swift
@@ -7,11 +7,10 @@
 
 import Foundation
 
-class ManagedServices: ObservableObject, FileMonitorDelegate {
-
+class ManagedServices: ObservableObject, FileMonitorDelegate, FolderMonitorDelegate {
     @Published var services: [Service] = []
 
-    private var monitors: [URL: FileMonitor] = [:]
+    private var monitors: [URL: FilesystemMonitor] = [:]
 
     func update(service: Service) {
         var services = self.services
@@ -31,6 +30,14 @@ class ManagedServices: ObservableObject, FileMonitorDelegate {
                 self.monitors.removeAll()
 
                 self.services = services
+
+                AutostartDirectory.urls().forEach { url in
+                    if let monitor = try? FolderMonitor(url: url) {
+                        self.monitors[url] = monitor
+                        monitor.delegate = self
+                    }
+                }
+
                 self.services.forEach { service in
                     guard let plist = service.plist else {
                         return
@@ -49,4 +56,16 @@ class ManagedServices: ObservableObject, FileMonitorDelegate {
             self.refresh()
         }
     }
+
+    func folderEvent(url: URL, event: DispatchSource.FileSystemEvent, additions: [URL]) {
+        let wantedPlistNames = services.map { $0.plistName }
+
+        if !additions.contains(where: { wantedPlistNames.contains($0.lastPathComponent) }) {
+            return
+        }
+
+        DispatchQueue.main.async {
+            self.refresh()
+        }
+    }
 }