Update

frontend/src/todos.ts

@@ -0,0 +1,62 @@
+import type { TicketTodo } from "./types";
+
+function parseDateOnly(value: string) {
+  const [year, month, day] = value.split("-").map(Number);
+  return new Date(year, month - 1, day);
+}
+
+export function formatDateOnly(date: Date) {
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, "0");
+  const day = String(date.getDate()).padStart(2, "0");
+
+  return `${year}-${month}-${day}`;
+}
+
+export function formatTodoDate(value: string) {
+  return new Intl.DateTimeFormat("de-DE", {
+    day: "2-digit",
+    month: "2-digit",
+    year: "numeric"
+  }).format(parseDateOnly(value));
+}
+
+export function formatTodoPeriod(todo: Pick<TicketTodo, "starts_on" | "ends_on">) {
+  if (!todo.starts_on && !todo.ends_on) {
+    return null;
+  }
+
+  if (todo.starts_on && todo.ends_on && todo.starts_on === todo.ends_on) {
+    return `am ${formatTodoDate(todo.starts_on)}`;
+  }
+
+  if (todo.starts_on && todo.ends_on) {
+    return `${formatTodoDate(todo.starts_on)} - ${formatTodoDate(todo.ends_on)}`;
+  }
+
+  if (todo.starts_on) {
+    return `ab ${formatTodoDate(todo.starts_on)}`;
+  }
+
+  return `bis ${formatTodoDate(todo.ends_on!)}`;
+}
+
+export function isTodoActiveOnDay(todo: Pick<TicketTodo, "starts_on" | "ends_on" | "status">, day: string) {
+  if (todo.status !== "open") {
+    return false;
+  }
+
+  if (!todo.starts_on && !todo.ends_on) {
+    return false;
+  }
+
+  return (!todo.starts_on || todo.starts_on <= day) && (!todo.ends_on || todo.ends_on >= day);
+}
+
+export function isTodoFixedOnDay(todo: Pick<TicketTodo, "starts_on" | "ends_on" | "status">, day: string) {
+  return todo.status === "open" && todo.starts_on === day && todo.ends_on === day;
+}
+
+export function isTodoOverdue(todo: Pick<TicketTodo, "ends_on" | "status">, today: string) {
+  return todo.status === "open" && Boolean(todo.ends_on) && todo.ends_on! < today;
+}