refactor: data structs for template + method

enclosing rooms.Room into roomTableData, with methods to be used in
tempalte to get other template related derived data structures

routes/room_page.go

@@ -72,10 +72,7 @@ func streamingRoomStates(
 		templFile := "templates/room.gohtml"
 		tableTemplates := "templates/tableTemplates.gohtml"
 		tmpl := template.Must(
-			template.New("").Funcs(template.FuncMap{
-				"bricksForPerson": bricksForPerson,
-				"personsFromRoom": personsFromRoom,
-			}).ParseFS(templateFs, tableTemplates, templFile))
+			template.New("").ParseFS(templateFs, tableTemplates, templFile))
 
 		roomStream := roomsM.Subscribe(r.Context(), roomName)
 		for room := range roomStream {
@@ -84,7 +81,11 @@ func streamingRoomStates(
 
 			var buffer bytes.Buffer
 
-			err := tmpl.ExecuteTemplate(&buffer, "simpleRoomShow", room)
+			roomTemplateData := roomTableData{
+				Room:          &room,
+				currentPerson: session.PersonId,
+			}
+			err := tmpl.ExecuteTemplate(&buffer, "simpleRoomShow", &roomTemplateData)
 			if err != nil {
 				log.Printf("/rooms/subscribe/%s got error on template %s", roomName, err)
 			}
@@ -197,10 +198,7 @@ func roomPageRoute(
 		baseFile := "templates/base.gohtml"
 		tableTemplates := "templates/tableTemplates.gohtml"
 		tmpl := template.Must(
-			template.New("").Funcs(template.FuncMap{
-				"bricksForPerson": bricksForPerson,
-				"personsFromRoom": personsFromRoom,
-			}).ParseFS(templateFs, tableTemplates, templFile, baseFile))
+			template.New("").ParseFS(templateFs, tableTemplates, templFile, baseFile))
 
 		type GestureData struct {
 			Name string
@@ -215,10 +213,13 @@ func roomPageRoute(
 		}
 
 		contentData := struct {
-			Room     rooms.Room
+			Room     *roomTableData
 			Gestures []GestureData
 		}{
-			Room:     room,
+			Room: &roomTableData{
+				Room:          &room,
+				currentPerson: session.PersonId,
+			},
 			Gestures: gesturesData,
 		}
 		data := pageData{

routes/room_page_templates_preview.go

@@ -33,32 +33,29 @@ var brickColors = map[rooms.HandGesture]template.CSS{
 	rooms.ChangeTopic: "--change-topic-color",
 }
 
+// data to be passed to "roomPeople" template
 type roomTableData struct {
-	Persons []personData
-	Total   int
-	Tangens float64
+	*rooms.Room
+	currentPerson rooms.PersonId
 }
 
-func personsFromRoom(room rooms.Room) roomTableData {
-	// TODO start from the 'logged in person'
-	total := len(room.Paricipants)
-	persons := make([]personData, 0, total)
-	tangens := math.Tan(math.Pi / float64(total)) // Math.tan(Math.PI/m);
-	// tangens = math.Round(tangens*100) / 100
+func (room *roomTableData)Persons() []personData {
+	persons := make([]personData, 0, room.Total())
 	for i, pId := range room.Paricipants {
 		personData := personDataFromRoom(room, pId)
 		personData.Index = i
-		// personData.Tan = math.Round(tangens*100)/100
 		persons = append(persons, personData)
 	}
-	return roomTableData{
-		Persons: persons,
-		Total:   total,
-		Tangens: tangens,
-	}
+	return persons
+}
+func (r *roomTableData)Total() int {
+	return len(r.Paricipants)
+}
+func (r *roomTableData)Tangens() float64 {
+	return math.Tan(math.Pi / float64(r.Total())) // Math.tan(Math.PI/m);
 }
 
-func personDataFromRoom(room rooms.Room, pId rooms.PersonId) personData {
+func personDataFromRoom(room *roomTableData, pId rooms.PersonId) personData {
 	person, exists := room.AllKnownPeople[pId]
 	if !exists || !slices.Contains(room.Paricipants, pId) {
 		return personData{}
@@ -85,7 +82,7 @@ func personDataFromRoom(room rooms.Room, pId rooms.PersonId) personData {
 	}
 }
 
-func bricksForPerson(pData personData) []brickState {
+func (pData personData)BricksForPerson() []brickState {
 	var result = make([]brickState, 5)
 	for gesture := rooms.ChangeTopic; gesture <= rooms.Meta; gesture++ {
 		// for index := rooms.Meta; index >= rooms.ChangeTopic; index-- {
@@ -168,7 +165,7 @@ func roomTemplatesPreview(
 			Bricks       []SingleBrickData
 			ABrick       brickState
 			TestPerson   personData
-			ARoom        rooms.Room
+			ARoom        *roomTableData
 		}{
 			DefaultColor: "--expand-color",
 			ABrick: brickState{
@@ -198,7 +195,10 @@ func roomTemplatesPreview(
 				},
 			},
 			TestPerson: testPersonData,
-			ARoom:      aRoom,
+			ARoom:      &roomTableData{
+				Room: &aRoom,
+				currentPerson: aRoom.Paricipants[0],
+			},
 		}
 
 		pageData := pageData{
@@ -207,10 +207,7 @@ func roomTemplatesPreview(
 		}
 
 		baseFile := "templates/base.gohtml"
-		tmpl := template.Must(template.New("").Funcs(template.FuncMap{
-			"bricksForPerson": bricksForPerson,
-			"personsFromRoom": personsFromRoom,
-		}).ParseFS(templateFs, baseFile,
+		tmpl := template.Must(template.New("").ParseFS(templateFs, baseFile,
 			"templates/tableTemplates.gohtml",
 			"templates/tableTemplatesPreview.gohtml",
 		))

routes/templates/tableTemplates.gohtml

@@ -65,13 +65,14 @@
 {{end}}
 
 <h2>Now for a person</h2>
+<p>expected to be called with personData</p>
 {{ define "personBlocks"  }}
 
 <div class="person-bricks "
      id="person-{{.Index}}"
      style="--i: {{ .Index }}"
      >
-  {{ range (bricksForPerson .) }}
+  {{ range .BricksForPerson }}
   {{ template "brick"  .  }}
   {{ end }}
   <p>{{ .Name }}</p>
@@ -81,8 +82,8 @@
 
 
 <h2>And now i'll want to get all persons for a room</h2>
+<p>expected be called with room *roomTableData</p>
   {{ define "roomPeople"  }}
-  {{ with  (personsFromRoom .)}}
   <div
     class="circle-container relative"
     style="--tan: {{ .Tangens }};  --m: {{ .Total }};"
@@ -91,5 +92,4 @@
     {{ template "personBlocks" . }}
     {{ end }}
   </div>
-  {{ end }}
   {{end}}