comments/comments.go

@@ -5,6 +5,7 @@ import (
 	"crypto/subtle"
 	"encoding/json"
 	"fmt"
+	"html/template"
 	"io"
 	"net/http"
 	"sync"
@@ -80,7 +81,8 @@ func (cs *Service) ServeComments(post string, w http.ResponseWriter, r *http.Req
 		})
 	}
 
-	_, err := cs.WriteTo(post, w)
+	w.Header().Set("Content-Type", "text/html")
+	_, err := cs.WriteHTML(post, w)
 	if err != nil {
 		return err
 	}
@@ -96,7 +98,37 @@ func (cs *Service) Load(post string) ([]Comment, error) {
 	return cs.Storage.Retreive(post)
 }
 
-func (cs *Service) WriteTo(post string, w io.Writer) (int64, error) {
+func (cs *Service) WriteHTML(post string, w io.Writer) (int64, error) {
+	buf := &bytes.Buffer{}
+	tmpl := template.Must(template.New("").Parse(
+		`<form onsubmit="javascript:submitComment(event)">
+		<script>
+			function submitComment(evt) {
+				var xhr = new XMLHttpRequest();
+				xhr.open('POST', document.location.pathname, true);
+				xhr.send(JSON.stringify({"text": evt.target.querySelector('textarea').value}));
+			}
+		</script>
+		<label>comment<textarea placeholder="comment..."></textarea></label>
+		<button>post</button>
+		</form>
+		{{range $idx, $elem := .}}<comment>
+		<name>$elem.Name</name>
+		<text>$elem.Text</name>
+		</comment>
+		{{end}}`))
+	comments, err := cs.Load(post)
+	if err != nil {
+		return 0, err
+	}
+	err = tmpl.Execute(buf, comments)
+	if err != nil {
+		return 0, err
+	}
+	return io.Copy(w, buf)
+}
+
+func (cs *Service) WriteJSON(post string, w io.Writer) (int64, error) {
 	r, err := cs.Storage.ReadAll(post)
 	if err != nil {
 		return 0, err