From 86d2d026dd017a3075e1e1cb64245530cd7bcd81 Mon Sep 17 00:00:00 2001
From: Derek Parker <parkerderek86@gmail.com>
Date: Tue, 20 May 2014 16:28:24 -0500
Subject: [PATCH] Add basic command implementation

---
 command/command.go      | 38 ++++++++++++++++++++++++++++++++++++++
 command/command_test.go | 19 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 command/command.go
 create mode 100644 command/command_test.go

diff --git a/command/command.go b/command/command.go
new file mode 100644
index 00000000..ef1f0857
--- /dev/null
+++ b/command/command.go
@@ -0,0 +1,38 @@
+package command
+
+import (
+	"fmt"
+	"os"
+)
+
+type cmdfunc func() error
+
+type Commands struct {
+	cmds map[string]cmdfunc
+}
+
+func DebugCommands() *Commands {
+	cmds := map[string]cmdfunc{
+		"exit": exitFunc,
+	}
+
+	return &Commands{cmds}
+}
+
+func (c *Commands) Find(cmdstr string) cmdfunc {
+	cmd, ok := c.cmds[cmdstr]
+	if !ok {
+		return noCmdAvailable
+	}
+
+	return cmd
+}
+
+func noCmdAvailable() error {
+	return fmt.Errorf("command not available")
+}
+
+func exitFunc() error {
+	os.Exit(0)
+	return nil
+}
diff --git a/command/command_test.go b/command/command_test.go
new file mode 100644
index 00000000..f6c96e62
--- /dev/null
+++ b/command/command_test.go
@@ -0,0 +1,19 @@
+package command
+
+import "testing"
+
+func TestCommandDefault(t *testing.T) {
+	var (
+		cmds = Commands{make(map[string]cmdfunc)}
+		cmd  = cmds.Find("non-existant-command")
+	)
+
+	err := cmd()
+	if err == nil {
+		t.Fatal("cmd() did not default")
+	}
+
+	if err.Error() != "command not available" {
+		t.Fatal("wrong command output")
+	}
+}
-- 
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