Make checking boxes not require full page reload

internal/notes/notes.go

@@ -336,7 +336,11 @@ func DeleteNote(uid string) error {
 	return os.Remove(filename)
 }
 
-type toggleCheckboxTransformer struct{ nthBox int }
+type toggleCheckboxTransformer struct {
+	nthBox     int
+	boxToggled bool
+	boxChecked bool
+}
 
 func (t *toggleCheckboxTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
 	boxesFound := 0
@@ -358,6 +362,8 @@ func (t *toggleCheckboxTransformer) Transform(node *ast.Document, reader text.Re
 		}
 
 		box.IsChecked = !box.IsChecked
+		t.boxToggled = true
+		t.boxChecked = box.IsChecked
 		return ast.WalkStop, nil
 	})
 }
@@ -380,8 +386,8 @@ func renderTaskCheckBox(writer util.BufWriter, source []byte, node ast.Node, ent
 	return ast.WalkContinue, err
 }
 
-func (n *Note) ToggleBox(nthBox int) {
-	checkboxTransformer := toggleCheckboxTransformer{nthBox: nthBox}
+func (n *Note) ToggleBox(nthBox int) (bool, bool) {
+	checkboxTransformer := toggleCheckboxTransformer{nthBox: nthBox, boxToggled: false}
 	transformer := util.Prioritized(&checkboxTransformer, 0)
 
 	renderer := markdown.NewRenderer()
@@ -397,6 +403,8 @@ func (n *Note) ToggleBox(nthBox int) {
 	md.Convert(n.Body, &buf)
 	n.Body = buf.Bytes()
 	n.Save()
+
+	return checkboxTransformer.boxToggled, checkboxTransformer.boxChecked
 }
 
 func (n *Note) HasTag(tag string) bool {

internal/notes/views/views.go

@@ -1,6 +1,7 @@
 package views
 
 import (
+	"encoding/json"
 	"log"
 	"net/http"
 	"strconv"
@@ -181,18 +182,25 @@ func togglebox(w http.ResponseWriter, r *http.Request) {
 	nthBox, err := strconv.Atoi(r.FormValue("box"))
 	if err != nil {
 		log.Fatal("You fucked up boy")
+		http.Error(w, "Box not provided as numeric value", 400)
 		return
 	}
 
 	note, ok := notes.Notes.GetOne(user, uid)
 	if !ok {
-		http.Redirect(w, r, myurls.Reverse("view", urls.Repl{"note": uid}), http.StatusFound)
+		http.Error(w, "Note not found", 404)
 		return
 	}
 
-	note.ToggleBox(nthBox)
+	toggled, checked := note.ToggleBox(nthBox)
 
-	http.Redirect(w, r, myurls.Reverse("view", urls.Repl{"note": note.Uid}), http.StatusFound)
+	if !toggled {
+		http.Error(w, "Failed to toggle box", 500)
+	} else {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(map[string]any{"checked": checked})
+	}
 }
 
 type titleAndURL struct {