Basic command handler, bugfixes

examples/commands.php

@@ -0,0 +1,21 @@
+<?php
+
+use NoccyLabs\React\Shell\CommandHandler;
+use React\EventLoop\Loop;
+
+require_once __DIR__."/../vendor/autoload.php";
+
+$shell = new NoccyLabs\React\Shell\Shell();
+
+$commands = new CommandHandler();
+$commands->add('help', function ($args, $shell) {
+    $shell->write("This could be usage help :)\n");
+});
+$commands->on('notfound', function ($command, $shell) {
+    $shell->write("Command not found: {$command}. Try help\n");
+});
+
+$shell->on('prompt', function ($shell) { 
+    $shell->setPrompt(date(">> ")); 
+});
+$shell->on('input', $commands);

examples/timers.php

@@ -2,11 +2,11 @@
 
 use React\EventLoop\Loop;
 
-require_once __DIR__."/vendor/autoload.php";
+require_once __DIR__."/../vendor/autoload.php";
 
 $shell = new NoccyLabs\React\Shell\Shell();
 
-$shell->on('prompt', function () use ($shell) { 
+$shell->on('prompt', function ($shell) { 
     $shell->setPrompt(date("H:i:s> ")); 
 });
 $shell->on('input', function (array $input) use ($shell) {

src/CommandHandler.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace NoccyLabs\React\Shell;
+
+use Evenement\EventEmitterInterface;
+use Evenement\EventEmitterTrait;
+use React\EventLoop\Loop;
+
+class CommandHandler implements EventEmitterInterface
+{
+
+    use EventEmitterTrait;
+
+    private array $commands = [];
+
+    public function add(string $command, callable $handler, array $signature=[]): self
+    {
+        $this->commands[$command] = [ 'handler' => $handler, 'signature' => $signature ];
+        return $this;
+    }
+
+    public function __invoke(array $line, Shell $shell)
+    {
+        $this->execute($line, $shell);
+    }
+
+    public function execute(array $line, Shell $shell)
+    {
+        $command = array_shift($line);
+
+        if (!array_key_exists($command, $this->commands)) {
+            $this->emit("notfound", [ $command, $shell ]);
+            return;
+        }
+
+        Loop::futureTick(fn() => call_user_func($this->commands[$command]['handler'], $line, $shell));
+
+    }
+}

src/Shell.php

@@ -68,11 +68,16 @@ class Shell implements WritableStreamInterface, EventEmitterInterface
                 exit(0);
 
             case "\n":
-                $buffer = str_getcsv($this->buffer, " ");
+                $buffer = str_getcsv(trim($this->buffer), " ");
                 $this->buffer = '';
                 $this->cursorPos = 0;
                 $this->scrollOffset = 0;
-                $this->emit('input', [ $buffer ]);
+                $this->ostream->write("\n");
+                if ($buffer[0] !== NULL) {
+                    $this->emit('input', [ $buffer, $this ]);
+                } else {
+                    $this->redrawPrompt();
+                }
                 break;
 
             case "\x7F": // backspace
@@ -156,7 +161,7 @@ class Shell implements WritableStreamInterface, EventEmitterInterface
 
     public function redrawPrompt(): void
     {
-        $prompt = $this->emit("prompt");
+        $this->emit("prompt", [ $this ]);
 
         $this->termWidth = intval(exec("tput cols"));
         $this->isPrompting = true;