From f1a6a6a5cf7d61c2df185206cb0a5b0e7eceb3c1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tomas=20Wenstr=C3=B6m?= <tomas.wenstrom@gmail.com>
Date: Tue, 26 Nov 2019 22:53:32 +0100
Subject: [PATCH] Add command control via named pipe

---
 src/kaka/cakelight/CakeLight.java      |  3 +-
 src/kaka/cakelight/Console.java        | 50 ++++++++++++++++++----------------
 src/kaka/cakelight/PipeController.java | 42 ++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 24 deletions(-)
 create mode 100644 src/kaka/cakelight/PipeController.java

diff --git a/src/kaka/cakelight/CakeLight.java b/src/kaka/cakelight/CakeLight.java
index 4b37bd7..65d325c 100644
--- a/src/kaka/cakelight/CakeLight.java
+++ b/src/kaka/cakelight/CakeLight.java
@@ -34,7 +34,8 @@ public class CakeLight {
     }
 
     public void startLoop() {
-        Console.start(this, config);
+        Console console = Console.start(this, config);
+        PipeController.start(console);
         initNativeHook();
         // TODO
 //        FrameGrabber grabber = FrameGrabber.from(config);
diff --git a/src/kaka/cakelight/Console.java b/src/kaka/cakelight/Console.java
index cf72cce..f32ba98 100644
--- a/src/kaka/cakelight/Console.java
+++ b/src/kaka/cakelight/Console.java
@@ -11,18 +11,18 @@ import java.util.Map;
 public class Console extends Thread {
     private CakeLight cakelight;
     private Configuration config;
-    private BufferedReader reader;
     private Map<String, Command> commands = new HashMap<>();
     private List<Command> commandList = new ArrayList<>();
 
-    public static void start(CakeLight cakelight, Configuration config) {
-        new Console(cakelight, config).start();
+    public static Console start(CakeLight cakelight, Configuration config) {
+	Console console = new Console(cakelight, config);
+	console.start();
+	return console;
     }
 
     private Console(CakeLight cakelight, Configuration config) {
         this.cakelight = cakelight;
 	this.config = config;
-	reader = new BufferedReader(new InputStreamReader(System.in));
 	register(new HelpCommand());
 	register(Commands.quit());
 	register(Commands.video());
@@ -70,28 +70,32 @@ public class Console extends Thread {
     @Override
     public void run() {
         while (true) {
-            System.out.print("> ");
-            try {
-                String input = reader.readLine();
-		String[] splitInput = input.split("\\s+", 2);
-		String name = splitInput[0];
-		String[] args = splitInput.length == 2
-			? splitInput[1].split("\\s+")
-			: new String[]{};
-
-		Command cmd = commands.get(name);
-		if (cmd != null) {
-		    cmd.activate(this, args);
-		} else {
-		    out("no command named '" + name + "'");
-		}
-            } catch (IOException e) {
-                System.out.println("Error reading from command line");
-                break;
-            }
+	    System.out.print("> ");
+	    try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
+		String input = reader.readLine();
+		handleInput(input);
+	    } catch (IOException e) {
+		System.out.println("Error reading from command line");
+		break;
+	    }
         }
     }
 
+    void handleInput(String input) {
+	String[] splitInput = input.split("\\s+", 2);
+	String name = splitInput[0];
+	String[] args = splitInput.length == 2
+		? splitInput[1].split("\\s+")
+		: new String[]{};
+
+	Command cmd = commands.get(name);
+	if (cmd != null) {
+	    cmd.activate(this, args);
+	} else {
+	    out("no command named '" + name + "'");
+	}
+    }
+
     void out(String text) {
 	System.out.println("(" + text + ")");
     }
diff --git a/src/kaka/cakelight/PipeController.java b/src/kaka/cakelight/PipeController.java
new file mode 100644
index 0000000..10ed6be
--- /dev/null
+++ b/src/kaka/cakelight/PipeController.java
@@ -0,0 +1,42 @@
+package kaka.cakelight;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class PipeController extends Thread {
+    private static final String PIPE = "cakectrl";
+    private Console console;
+
+    public static void start(Console console) {
+	new PipeController(console).start();
+    }
+
+    private PipeController(Console console) {
+        this.console = console;
+    }
+
+    @Override
+    public void run() {
+        while (true) {
+            createPipe();
+            try (BufferedReader reader = new BufferedReader(new FileReader(new File(PIPE)))) {
+                String input;
+                while ((input = reader.readLine()) != null) {
+                    console.handleInput(input);
+                }
+            } catch (IOException e) {
+                System.out.println("Error reading from pipe '" + PIPE + "'");
+            }
+        }
+    }
+
+    private void createPipe() {
+        try {
+            Runtime.getRuntime().exec("mkfifo " + PIPE);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
-- 
2.11.0