add leaf parser, http writer to limit title instances

server/server.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -354,12 +355,14 @@ func (server *Server) apiV0FilesPostHandler(w http.ResponseWriter, r *http.Reque
 	if err != nil {
 		return err
 	}
+	r.Body = io.NopCloser(bytes.NewReader(b))
 
 	pid := server.fileId(r)
 	id := NewID(pid).Push(strings.Split(uuid.New().String(), "-")[0])
-	leaf := Leaf{}
-	leaf.Meta.Title = r.Header.Get("Title")
-	leaf.Content = string(b)
+	leaf, err := NewHTTPRequestLeaf(r)
+	if err != nil {
+		return err
+	}
 	if err := server.tree().Put(id, leaf); err != nil {
 		return err
 	}
@@ -384,9 +387,7 @@ func (server *Server) apiV0FilesIDGetHandler(w http.ResponseWriter, r *http.Requ
 		return err
 	}
 
-	w.Header().Set("Title", leaf.Meta.Title)
-	_, err = w.Write([]byte(leaf.Content))
-	return err
+	return leaf.WriteHTTP(w)
 }
 
 func (server *Server) apiV0FilesIDDelHandler(w http.ResponseWriter, r *http.Request) error {
@@ -427,14 +428,12 @@ func (server *Server) apiV0FilesIDPutHandler(w http.ResponseWriter, r *http.Requ
 	} else if err != nil {
 		return err
 	}
-	b, err := ioutil.ReadAll(r.Body)
+
+	updatedLeaf, err := NewHTTPRequestLeaf(r)
 	if err != nil {
 		return err
 	}
-
-	leaf.Content = string(b)
-	leaf.Meta.Title = r.Header.Get("Title")
-	leaf.Meta.Deleted = false
+	leaf = leaf.Merge(updatedLeaf)
 
 	if err := server.tree().Put(id, leaf); err != nil {
 		return err

server/server_test.go

@@ -31,17 +31,15 @@ func TestServerRoutes(t *testing.T) {
 	ensureAndWrite(server.diskMediaPath("delid"), []byte("hi"))
 
 	tree := server.tree()
-	leaf := Leaf{Content: "getfid body"}
+	leaf, _ := NewLeaf("", "getfid body")
 	if err := tree.Put(NewID("getfid"), leaf); err != nil {
 		t.Fatal(err)
 	}
 
-	leaf.Meta.Title = "putfid title"
-	leaf.Content = "initial putfid body"
+	leaf, _ = NewLeaf("putfid title", "initial putfid body")
 	tree.Put(NewID("putfid"), leaf)
 
-	leaf.Meta.Title = "delfid title"
-	leaf.Content = "delfid body"
+	leaf, _ = NewLeaf("delfid title", "delfid body")
 	tree.Put(NewID("delfid"), leaf)
 
 	t.Log(tree.GetRoot())

server/tree.go

@@ -2,13 +2,43 @@ package main
 
 import (
 	"encoding/json"
+	"io"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"path"
+	"strings"
 
 	yaml "gopkg.in/yaml.v2"
 )
 
+func NewHTTPRequestLeaf(r *http.Request) (Leaf, error) {
+	var leaf Leaf
+	if b, err := ioutil.ReadAll(r.Body); err != nil {
+		return leaf, err
+	} else {
+		leaf.Content = string(b)
+	}
+	if leaf.Meta.Title = r.Header.Get("Title"); leaf.Meta.Title == "" {
+		leaf.Meta.Title = "Untitled"
+	}
+	leaf.Meta.Deleted = r.Method == http.MethodDelete
+	return leaf, nil
+}
+
+func NewLeaf(title string, content string) (Leaf, error) {
+	return NewHTTPRequestLeaf(&http.Request{
+		Header: http.Header{"Title": []string{title}},
+		Body:   io.NopCloser(strings.NewReader(content)),
+	})
+}
+
+func (leaf Leaf) WriteHTTP(w http.ResponseWriter) error {
+	w.Header().Set("Title", leaf.Meta.Title)
+	_, err := w.Write([]byte(leaf.Content))
+	return err
+}
+
 type Branch struct {
 	Leaf     Leaf
 	Branches map[ID]Branch
@@ -34,11 +64,13 @@ func (branch Branch) forEach(preid ID, foo func(ID, Leaf) error) error {
 	return nil
 }
 
+type Meta struct {
+	Title   string
+	Deleted bool
+}
+
 type Leaf struct {
-	Meta struct {
-		Title   string
-		Deleted bool
-	}
+	Meta    Meta
 	Content string
 }
 
@@ -150,7 +182,7 @@ func (tree Tree) getRoot(pid ID, withContent, withDeleted bool) (Branch, error)
 				m.Leaf.Content = ""
 			}
 			if m.Leaf.Meta.Deleted && !withDeleted {
-				return m, nil
+				return Branch{Branches: map[ID]Branch{}}, nil
 			}
 		} else if entry.IsDir() {
 			subtree := tree.WithRoot(path.Join(tree.root, entry.Name()))