From 7bf0709685edb061d71e0dd86f679f3a22d26b7c Mon Sep 17 00:00:00 2001
From: rick <technoweenie@gmail.com>
Date: Fri, 18 Oct 2013 18:09:57 -0600
Subject: [PATCH] add Queue.Walk()

---
 queuedir/queuedir.go      | 27 +++++++++++++++++++++++++++
 queuedir/queuedir_test.go | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/queuedir/queuedir.go b/queuedir/queuedir.go
index 3ad8b7b1..b0fb257d 100644
--- a/queuedir/queuedir.go
+++ b/queuedir/queuedir.go
@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"github.com/streadway/simpleuuid"
 	"io"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
@@ -33,6 +34,8 @@ type Queue struct {
 	Dir  *QueueDir
 }
 
+type WalkFunc func(id string, body []byte) error
+
 func (q *Queue) Add(reader io.Reader) (string, error) {
 	uuid, err := simpleuuid.NewTime(time.Now())
 	if err != nil {
@@ -48,6 +51,30 @@ func (q *Queue) Add(reader io.Reader) (string, error) {
 	return id, err
 }
 
+func (q *Queue) Walk(cb WalkFunc) error {
+	return filepath.Walk(q.Path, func(path string, info os.FileInfo, err error) error {
+		if info.IsDir() {
+			return nil
+		}
+
+		if err != nil {
+			return err
+		}
+
+		file, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+
+		body, err := ioutil.ReadAll(file)
+		if err != nil {
+			return err
+		}
+
+		return cb(filepath.Base(path), body)
+	})
+}
+
 func (q *Queue) AddString(body string) (string, error) {
 	return q.Add(bytes.NewBufferString(body))
 }
diff --git a/queuedir/queuedir_test.go b/queuedir/queuedir_test.go
index 89a15e09..2d65180b 100644
--- a/queuedir/queuedir_test.go
+++ b/queuedir/queuedir_test.go
@@ -30,7 +30,41 @@ func TestAdd(t *testing.T) {
 
 	assert.Equal(t, "BOOM", string(by))
 }
+
+func TestWalk(t *testing.T) {
+	q := Setup(t)
+	defer q.Teardown()
+
+	id1, err := q.Queue.AddString("BOOM0")
+	if err != nil {
+		t.Fatalf("Cannot add to queue: %s", err)
 	}
+
+	id2, err := q.Queue.AddString("BOOM1")
+	if err != nil {
+		t.Fatalf("Cannot add to queue: %s", err)
+	}
+
+	seen := make(map[string]bool)
+
+	q.Queue.Walk(func(id string, body []byte) error {
+		if err != nil {
+			t.Errorf("Error reading queue data for %s: %s", id, err)
+		}
+
+		seen[id] = true
+		if id == id1 {
+			assert.Equal(t, id1, id)
+		} else if id == id2 {
+			assert.Equal(t, id2, id)
+		} else {
+			t.Errorf("Weird ID: %s", id)
+		}
+
+		return nil
+	})
+
+	assert.Equal(t, 2, len(seen))
 }
 
 func TestMove(t *testing.T) {