feat(dm): more stats

src/lib/date.ts

@@ -8,3 +8,86 @@ export const getDistanceBetweenDatesInDays = (a: Date, b: Date) => {
 
   return Math.floor((utc2 - utc1) / _MS_PER_DAY);
 };
+
+// https://dev.to/pretaporter/how-to-get-month-list-in-your-language-4lfb
+export const getMonthList = (
+  locales?: string | string[],
+  format: "long" | "short" = "long"
+): string[] => {
+  const year = new Date().getFullYear(); // 2020
+  const monthList = [...Array(12).keys()]; // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
+  const formatter = new Intl.DateTimeFormat(locales, {
+    month: format,
+  });
+
+  const getMonthName = (monthIndex: number) =>
+    formatter.format(new Date(year, monthIndex));
+
+  return monthList.map(getMonthName);
+};
+
+export const getDateList = (startDate: Date, endDate: Date): Date[] => {
+  const dateArray = new Array();
+
+  // end date for loop has to be one date after because we increment after adding the date in the loop
+  const endDateForLoop = new Date(endDate);
+
+  endDateForLoop.setDate(endDateForLoop.getDate() + 1);
+
+  let currentDate = startDate;
+
+  while (currentDate <= endDateForLoop) {
+    dateArray.push(new Date(currentDate));
+
+    const newDate = new Date(currentDate);
+    newDate.setDate(newDate.getDate() + 1);
+
+    currentDate = newDate;
+  }
+
+  return dateArray;
+};
+
+export const getHourList = (
+  locales?: string | string[],
+  format: "numeric" | "2-digit" = "numeric"
+): string[] => {
+  const now = new Date();
+  const year = now.getFullYear();
+  const month = now.getMonth();
+  const day = now.getDate();
+
+  const hourList = [...Array(24).keys()]; // [0, 1, 2, 3, 4, 5, 6, ..., 23]
+  const formatter = new Intl.DateTimeFormat(locales, {
+    hour: format,
+    hourCycle: "h11",
+  });
+
+  const getHourName = (hourIndex: number) =>
+    formatter.format(new Date(year, month, day, hourIndex));
+
+  return hourList.map(getHourName);
+};
+
+export const getWeekdayList = (
+  locales?: string | string[],
+  format: "long" | "short" | "narrow" = "long"
+): string[] => {
+  const monday = new Date();
+  // set day to monday (w/o +1 it would be sunday)
+  monday.setDate(monday.getDate() - monday.getDay() + 1);
+
+  const year = monday.getFullYear();
+  const month = monday.getMonth();
+  const mondayDate = monday.getDate();
+
+  const hourList = [...Array(7).keys()]; // [0, 1, 2, 3, 4, 5, 6]
+  const formatter = new Intl.DateTimeFormat(locales, {
+    weekday: format,
+  });
+
+  const getWeekDayName = (weekDayIndex: number) =>
+    formatter.format(new Date(year, month, mondayDate + weekDayIndex));
+
+  return hourList.map(getWeekDayName);
+};