organize events by months, weeks and days and print a calendar view

web/src/components/events/EventContainer.tsx

@@ -3,19 +3,20 @@
 import { useState } from "react";
 import { EventItem } from "./EventItem";
 import { EventFilter } from "./EventFilter";
-import { EventFragment, getSingularEvents } from "@/lib/event";
 import {
-  toLocalTime,
-  formatDate,
-  commonDateFormat,
-  isTodayOrFuture,
-} from "@/lib/date";
+  EventFragment,
+  getSingularEvents,
+  organizeEventsByDate,
+} from "@/lib/event";
+import { isTodayOrFuture } from "@/lib/date";
 import styles from "./eventContainer.module.scss";
+import { formatDate, formatYearMonth } from "@/lib/date";
+import { getYear, parse } from "date-fns";
 
 type EventContainerMode = "list" | "calendar";
 
 export const EventContainer = ({ events }: { events: EventFragment[] }) => {
-  const [mode, setMode] = useState<EventContainerMode>("calendar");
+  const [mode, setMode] = useState<EventContainerMode>("list");
 
   return (
     <div className={styles.events}>
@@ -43,15 +44,38 @@ const EventList = ({ events }: { events: EventFragment[] }) => {
 };
 
 const EventCalendar = ({ events }: { events: EventFragment[] }) => {
-  const singularEvents = getSingularEvents(events).filter((x) =>
-    x.occurrence?.start && isTodayOrFuture(x.occurrence.start)
+  const futureSingularEvents = getSingularEvents(events).filter(
+    (x) => x.occurrence?.start && isTodayOrFuture(x.occurrence.start)
   );
 
+  const eventsByDate = organizeEventsByDate(futureSingularEvents);
+
   return (
-    <ul className={styles.eventList}>
-      {singularEvents.map((event) => (
+    <div className={styles.eventList}>
+      {Object.keys(eventsByDate).map((yearMonth) => (
+        <div key={yearMonth} className={styles.calendarYearMonth}>
+          <h2>{formatYearMonth(yearMonth)}</h2>
+          {Object.keys(eventsByDate[yearMonth]).map((week) => (
+            <div key={week} className={styles.calendarWeek}>
+              {Object.keys(eventsByDate[yearMonth][week]).map((day) => (
+                <div key={day} className={styles.calendarDay}>
+                  <h3>
+                    {formatDate(
+                      parse(day, "yyyy-MM-dd", new Date()),
+                      "eeee dd.MM."
+                    )}
+                  </h3>
+                  <ul>
+                    {eventsByDate[yearMonth][week][day].map((event) => (
                       <EventItem key={event.id} event={event} />
                     ))}
                   </ul>
+                </div>
+              ))}
+            </div>
+          ))}
+        </div>
+      ))}
+    </div>
   );
 };

web/src/components/events/eventContainer.module.scss

@@ -22,3 +22,18 @@
     border-radius: 0;
   }
 }
+
+.calendarYearMonth {
+  h2:first-letter {
+    text-transform: capitalize
+  }
+}
+
+.calendarWeek {}
+
+.calendarDay {
+  h3:first-letter {
+    text-transform: capitalize
+  }
+}
+

web/src/lib/date.ts

@@ -1,5 +1,6 @@
-import { isToday, isAfter, parseISO } from "date-fns";
-import { toZonedTime, format } from "date-fns-tz";
+import { isToday, isAfter, parse } from "date-fns";
+import { nb } from "date-fns/locale";
+import { toZonedTime, format} from "date-fns-tz";
 
 const timeZone = "Europe/Oslo";
 
@@ -10,7 +11,16 @@ export function toLocalTime(date: Date | string | number) {
 }
 
 export function formatDate(date: Date | string | number, formatStr: string) {
-  return format(toLocalTime(date), formatStr, { timeZone });
+  return format(toLocalTime(date), formatStr, { timeZone, locale: nb });
+}
+
+export function formatYearMonth(yearMonth: string) {
+  // full name of month if year is current year, otherwise name of month + year
+  const parsed = parse(yearMonth, "yyyy-MM", new Date());
+  if (parsed.getFullYear === new Date().getFullYear) {
+    return formatDate(parsed, "MMMM");
+  }
+  return formatDate(parsed, "MMMM yyyy");
 }
 
 export function isTodayOrFuture(

web/src/lib/event.ts

@@ -1,7 +1,23 @@
+import {
+  compareAsc,
+  getYear,
+  getMonth,
+  getWeek,
+  getDate,
+  endOfWeek,
+  startOfWeek,
+  eachDayOfInterval,
+  addWeeks,
+} from "date-fns";
+import { toLocalTime, formatDate } from "./date";
 import { graphql } from "@/gql";
 import { EventFragment, EventOccurrence } from "@/gql/graphql";
 
-export type { EventFragment } from "@/gql/graphql"
+export type { EventFragment } from "@/gql/graphql";
+
+export type SingularEvent = EventFragment & {
+  occurrence: EventOccurrence;
+};
 
 const EventFragmentDefinition = graphql(`
   fragment Event on EventPage {
@@ -55,10 +71,6 @@ export const allEventsQuery = graphql(`
   }
 `);
 
-export type SingularEvent = EventFragment & {
-  occurrence: EventOccurrence;
-};
-
 export function getSingularEvents(events: EventFragment[]) {
   return events
     .map((event) => {
@@ -77,3 +89,59 @@ export function getSingularEvents(events: EventFragment[]) {
 function isDefined<T>(val: T | undefined | null): val is T {
   return val !== undefined && val !== null;
 }
+
+interface EventsByDate {
+  [yearMonth: string]: {
+    [week: number]: {
+      [day: number]: SingularEvent[];
+    };
+  };
+}
+
+export function organizeEventsByDate(events: SingularEvent[]): EventsByDate {
+  const sortedEvents = events.sort((a, b) =>
+    compareAsc(new Date(a.occurrence.start), new Date(b.occurrence.start))
+  );
+
+  const eventsByDate: EventsByDate = {};
+
+  const minDate = new Date(sortedEvents[0]?.occurrence.start);
+  const maxDate = new Date(
+    sortedEvents[sortedEvents.length - 1]?.occurrence.start
+  );
+
+  let currentDate = startOfWeek(minDate, { weekStartsOn: 1 });
+  while (currentDate <= maxDate) {
+    const yearMonth = formatDate(currentDate, "yyyy-MM");
+    const week = formatDate(currentDate, "w");
+    const daysOfWeek = eachDayOfInterval({
+      start: currentDate,
+      end: endOfWeek(currentDate, { weekStartsOn: 1 }),
+    });
+
+    if (!eventsByDate[yearMonth]) {
+      eventsByDate[yearMonth] = {};
+    }
+    if (!eventsByDate[yearMonth][week]) {
+      eventsByDate[yearMonth][week] = {};
+    }
+    daysOfWeek.forEach((day) => {
+      const formattedDay = formatDate(day, "yyyy-MM-dd");
+      if (!eventsByDate[yearMonth][week][formattedDay]) {
+        eventsByDate[yearMonth][week][formattedDay] = [];
+      }
+    });
+
+    currentDate = addWeeks(currentDate, 1);
+  }
+
+  sortedEvents.forEach((event) => {
+    const start = toLocalTime(event.occurrence.start);
+    const yearMonth = formatDate(start, "yyyy-MM");
+    const week = formatDate(start, "w");
+    const day = formatDate(start, "yyyy-MM-dd");
+    eventsByDate[yearMonth][week][day].push(event);
+  });
+
+  return eventsByDate;
+}