Factor out voting form

front/server.go

@@ -67,8 +67,27 @@ var timeLabels = []string{
 	"12 PM", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11",
 }
 
-func (h *handler) handleVote(w http.ResponseWriter, r *http.Request) {
+func disableIf(cond bool, input hm.Term) hm.Term {
-	// TODO use actual data
+	if !cond {
+		return input
+	}
+	switch e := input.(type) {
+	case hm.ParentElement:
+		e.Attribs = append(e.Attribs, a.Disabled())
+		return e
+	case hm.VoidElement:
+		e.Attribs = append(e.Attribs, a.Disabled())
+		return e
+	default:
+		return e
+	}
+}
+
+type voteState struct {
+	name string
+}
+
+func voteForm(disabled bool, st voteState) hm.Term {
 	var rows = hm.Terms{
 		e.Thead()(
 			e.Th()(),
@@ -82,46 +101,34 @@ func (h *handler) handleVote(w http.ResponseWriter, r *http.Request) {
 			e.Td()(hm.Text(timeLabels[slot])),
 		}
 		for day := 0; day < 3; day++ {
-			row = append(row, e.Td()(e.Input(a.Type("checkbox"))))
+			row = append(row, e.Td()(disableIf(disabled, e.Input(a.Type("checkbox")))))
 		}
 		rows = append(rows, e.Tr()(row))
 	}
-	body := hm.Terms{
+	return e.Form(a.Method(http.MethodPost), a.Action(pathDoVote))(
-		e.H2()(hm.Text("Billy's birthday party")),
-		e.P()(hm.Text("At Billy's house. Bring presents. Eat cake.")),
-		e.Form(a.Method(http.MethodPost), a.Action(pathDoVote))(
 		e.Label()(hm.Text("What's your name?")),
 		e.Br(),
-			e.Input(a.Size(40)),
+		disableIf(disabled, e.Input(a.Size(40), a.Value(st.name))),
 		e.Fieldset()(
 			e.Legend()(hm.Text("When are you available?")),
 			e.Table()(rows),
 		),
 		e.Input(a.Type("submit"), a.Value("Submit")),
-		),
+	)
+}
+
+func (h *handler) handleVote(w http.ResponseWriter, r *http.Request) {
+	// TODO use actual data
+	body := hm.Terms{
+		e.H2()(hm.Text("Billy's birthday party")),
+		e.P()(hm.Text("At Billy's house. Bring presents. Eat cake.")),
+		voteForm(false, voteState{}),
 	}
 	_ = h.writePage(w, body)
 }
 
 func (h *handler) handleDoVote(w http.ResponseWriter, r *http.Request) {
 	// TODO use actual data
-	var rows = hm.Terms{
-		e.Thead()(
-			e.Th()(),
-			e.Th()(hm.Text("May 3")),
-			e.Th()(hm.Text("May 4")),
-			e.Th()(hm.Text("May 5")),
-		),
-	}
-	for slot := 0; slot < 24; slot++ {
-		var row = hm.Terms{
-			e.Td()(hm.Text(timeLabels[slot])),
-		}
-		for day := 0; day < 3; day++ {
-			row = append(row, e.Td()(e.Input(a.Type("checkbox"), a.Disabled())))
-		}
-		rows = append(rows, e.Tr()(row))
-	}
 	body := hm.Terms{
 		e.H2()(hm.Text("Billy's birthday party")),
 		e.P()(hm.Text("At Billy's house. Bring presents. Eat cake.")),
@@ -131,16 +138,7 @@ func (h *handler) handleDoVote(w http.ResponseWriter, r *http.Request) {
 			e.A(a.Href("#"))(hm.Text("this link")),
 			hm.Text("."),
 		),
-		e.Form(a.Method(http.MethodPost), a.Action(pathDoVote))(
+		voteForm(true, voteState{name: "Suzie Q"}),
-			e.Label()(hm.Text("What's your name?")),
-			e.Br(),
-			e.Input(a.Size(40), a.Disabled(), a.Value("Suzie Q")),
-			e.Fieldset()(
-				e.Legend()(hm.Text("When are you available?")),
-				e.Table()(rows),
-			),
-			e.Input(a.Type("submit"), a.Value("Submit")),
-		),
 	}
 	_ = h.writePage(w, body)
 }