fix(web): timeline time bucket issue (#20438)

web/src/lib/components/photos-page/asset-grid.svelte

@@ -29,12 +29,7 @@
   import { deleteAssets, updateStackedAssetInTimeline, updateUnstackedAssetInTimeline } from '$lib/utils/actions';
   import { archiveAssets, cancelMultiselect, selectAllAssets, stackAssets } from '$lib/utils/asset-utils';
   import { navigate } from '$lib/utils/navigation';
-  import {
-    getTimes,
-    toTimelineAsset,
-    type ScrubberListener,
-    type TimelinePlainYearMonth,
-  } from '$lib/utils/timeline-util';
+  import { getTimes, toTimelineAsset, type ScrubberListener, type TimelineYearMonth } from '$lib/utils/timeline-util';
   import { AssetVisibility, getAssetInfo, type AlbumResponseDto, type PersonResponseDto } from '@immich/sdk';
   import { modalManager } from '@immich/ui';
   import { DateTime } from 'luxon';
@@ -343,7 +338,7 @@
 
       const monthsLength = timelineManager.months.length;
       for (let i = -1; i < monthsLength + 1; i++) {
-        let monthGroup: TimelinePlainYearMonth | undefined;
+        let monthGroup: TimelineYearMonth | undefined;
         let monthGroupHeight = 0;
         if (i === -1) {
           // lead-in

web/src/lib/managers/timeline-manager/group-insertion-cache.svelte.ts

@@ -1,4 +1,4 @@
-import { setDifference, type TimelinePlainDate } from '$lib/utils/timeline-util';
+import { setDifference, type TimelineDate } from '$lib/utils/timeline-util';
 import { AssetOrder } from '@immich/sdk';
 import { SvelteSet } from 'svelte/reactivity';
 import type { DayGroup } from './day-group.svelte';
@@ -13,11 +13,11 @@ export class GroupInsertionCache {
   changedDayGroups = new SvelteSet<DayGroup>();
   newDayGroups = new SvelteSet<DayGroup>();
 
-  getDayGroup({ year, month, day }: TimelinePlainDate): DayGroup | undefined {
+  getDayGroup({ year, month, day }: TimelineDate): DayGroup | undefined {
     return this.#lookupCache[year]?.[month]?.[day];
   }
 
-  setDayGroup(dayGroup: DayGroup, { year, month, day }: TimelinePlainDate) {
+  setDayGroup(dayGroup: DayGroup, { year, month, day }: TimelineDate) {
     if (!this.#lookupCache[year]) {
       this.#lookupCache[year] = {};
     }

web/src/lib/managers/timeline-manager/internal/load-support.svelte.ts

@@ -1,7 +1,6 @@
 import { authManager } from '$lib/managers/auth-manager.svelte';
 import { toISOYearMonthUTC } from '$lib/utils/timeline-util';
 import { getTimeBucket } from '@immich/sdk';
-
 import type { MonthGroup } from '../month-group.svelte';
 import type { TimelineManager } from '../timeline-manager.svelte';
 import type { TimelineManagerOptions } from '../types';

web/src/lib/managers/timeline-manager/internal/operations-support.svelte.ts

@@ -1,4 +1,4 @@
-import { setDifference, type TimelinePlainDate } from '$lib/utils/timeline-util';
+import { setDifference, type TimelineDate } from '$lib/utils/timeline-util';
 import { AssetOrder } from '@immich/sdk';
 
 import { SvelteSet } from 'svelte/reactivity';
@@ -70,7 +70,7 @@ export function runAssetOperation(
   const changedMonthGroups = new SvelteSet<MonthGroup>();
   let idsToProcess = new SvelteSet(ids);
   const idsProcessed = new SvelteSet<string>();
-  const combinedMoveAssets: { asset: TimelineAsset; date: TimelinePlainDate }[][] = [];
+  const combinedMoveAssets: { asset: TimelineAsset; date: TimelineDate }[][] = [];
   for (const month of timelineManager.months) {
     if (idsToProcess.size > 0) {
       const { moveAssets, processedIds, changedGeometry } = month.runAssetOperation(idsToProcess, operation);

web/src/lib/managers/timeline-manager/internal/search-support.svelte.ts

@@ -1,4 +1,4 @@
-import { plainDateTimeCompare, type TimelinePlainYearMonth } from '$lib/utils/timeline-util';
+import { plainDateTimeCompare, type TimelineYearMonth } from '$lib/utils/timeline-util';
 import { AssetOrder } from '@immich/sdk';
 import type { MonthGroup } from '../month-group.svelte';
 import type { TimelineManager } from '../timeline-manager.svelte';
@@ -42,7 +42,7 @@ export function findMonthGroupForAsset(timelineManager: TimelineManager, id: str
 
 export function getMonthGroupByDate(
   timelineManager: TimelineManager,
-  targetYearMonth: TimelinePlainYearMonth,
+  targetYearMonth: TimelineYearMonth,
 ): MonthGroup | undefined {
   return timelineManager.months.find(
     (month) => month.yearMonth.year === targetYearMonth.year && month.yearMonth.month === targetYearMonth.month,
@@ -135,7 +135,7 @@ export async function retrieveRange(timelineManager: TimelineManager, start: Ass
   return range;
 }
 
-export function findMonthGroupForDate(timelineManager: TimelineManager, targetYearMonth: TimelinePlainYearMonth) {
+export function findMonthGroupForDate(timelineManager: TimelineManager, targetYearMonth: TimelineYearMonth) {
   for (const month of timelineManager.months) {
     const { year, month: monthNum } = month.yearMonth;
     if (monthNum === targetYearMonth.month && year === targetYearMonth.year) {

web/src/lib/managers/timeline-manager/month-group.svelte.ts

@@ -10,8 +10,8 @@ import {
   fromTimelinePlainYearMonth,
   getTimes,
   setDifference,
-  type TimelinePlainDateTime,
-  type TimelinePlainYearMonth,
+  type TimelineDateTime,
+  type TimelineYearMonth,
 } from '$lib/utils/timeline-util';
 
 import { t } from 'svelte-i18n';
@@ -47,11 +47,11 @@ export class MonthGroup {
   isHeightActual: boolean = $state(false);
 
   readonly monthGroupTitle: string;
-  readonly yearMonth: TimelinePlainYearMonth;
+  readonly yearMonth: TimelineYearMonth;
 
   constructor(
     store: TimelineManager,
-    yearMonth: TimelinePlainYearMonth,
+    yearMonth: TimelineYearMonth,
     initialCount: number,
     order: AssetOrder = AssetOrder.Desc,
   ) {
@@ -351,7 +351,7 @@ export class MonthGroup {
     }
   }
 
-  findClosest(target: TimelinePlainDateTime) {
+  findClosest(target: TimelineDateTime) {
     const targetDate = fromTimelinePlainDateTime(target);
     let closest = undefined;
     let smallestDiff = Infinity;

web/src/lib/managers/timeline-manager/timeline-manager.svelte.ts

@@ -3,7 +3,7 @@ import { AssetOrder, getAssetInfo, getTimeBuckets } from '@immich/sdk';
 import { authManager } from '$lib/managers/auth-manager.svelte';
 
 import { CancellableTask } from '$lib/utils/cancellable-task';
-import { toTimelineAsset, type TimelinePlainDateTime, type TimelinePlainYearMonth } from '$lib/utils/timeline-util';
+import { toTimelineAsset, type TimelineDateTime, type TimelineYearMonth } from '$lib/utils/timeline-util';
 
 import { clamp, debounce, isEqual } from 'lodash-es';
 import { SvelteDate, SvelteMap, SvelteSet } from 'svelte/reactivity';
@@ -387,7 +387,7 @@ export class TimelineManager {
     };
   }
 
-  async loadMonthGroup(yearMonth: TimelinePlainYearMonth, options?: { cancelable: boolean }): Promise<void> {
+  async loadMonthGroup(yearMonth: TimelineYearMonth, options?: { cancelable: boolean }): Promise<void> {
     let cancelable = true;
     if (options) {
       cancelable = options.cancelable;
@@ -433,7 +433,7 @@ export class TimelineManager {
     }
   }
 
-  async #loadMonthGroupAtTime(yearMonth: TimelinePlainYearMonth, options?: { cancelable: boolean }) {
+  async #loadMonthGroupAtTime(yearMonth: TimelineYearMonth, options?: { cancelable: boolean }) {
     await this.loadMonthGroup(yearMonth, options);
     return getMonthGroupByDate(this, yearMonth);
   }
@@ -514,7 +514,7 @@ export class TimelineManager {
     return await getAssetWithOffset(this, assetDescriptor, interval, 'earlier');
   }
 
-  async getClosestAssetToDate(dateTime: TimelinePlainDateTime) {
+  async getClosestAssetToDate(dateTime: TimelineDateTime) {
     const monthGroup = findMonthGroupForDate(this, dateTime);
     if (!monthGroup) {
       return;

web/src/lib/managers/timeline-manager/types.ts

@@ -1,4 +1,4 @@
-import type { TimelinePlainDate, TimelinePlainDateTime } from '$lib/utils/timeline-util';
+import type { TimelineDate, TimelineDateTime } from '$lib/utils/timeline-util';
 import type { AssetStackResponseDto, AssetVisibility } from '@immich/sdk';
 
 export type AssetApiGetTimeBucketsRequest = Parameters<typeof import('@immich/sdk').getTimeBuckets>[0];
@@ -17,8 +17,8 @@ export type TimelineAsset = {
   ownerId: string;
   ratio: number;
   thumbhash: string | null;
-  localDateTime: TimelinePlainDateTime;
-  fileCreatedAt: TimelinePlainDateTime;
+  localDateTime: TimelineDateTime;
+  fileCreatedAt: TimelineDateTime;
   visibility: AssetVisibility;
   isFavorite: boolean;
   isTrashed: boolean;
@@ -35,7 +35,7 @@ export type TimelineAsset = {
 
 export type AssetOperation = (asset: TimelineAsset) => { remove: boolean };
 
-export type MoveAsset = { asset: TimelineAsset; date: TimelinePlainDate };
+export type MoveAsset = { asset: TimelineAsset; date: TimelineDate };
 
 export interface Viewport {
   width: number;

web/src/lib/utils/timeline-util.ts

@@ -7,16 +7,16 @@ import { SvelteSet } from 'svelte/reactivity';
 import { get } from 'svelte/store';
 
 // Move type definitions to the top
-export type TimelinePlainYearMonth = {
+export type TimelineYearMonth = {
   year: number;
   month: number;
 };
 
-export type TimelinePlainDate = TimelinePlainYearMonth & {
+export type TimelineDate = TimelineYearMonth & {
   day: number;
 };
 
-export type TimelinePlainDateTime = TimelinePlainDate & {
+export type TimelineDateTime = TimelineDate & {
   hour: number;
   minute: number;
   second: number;
@@ -33,29 +33,26 @@ export type ScrubberListener = (
 export const fromISODateTime = (isoDateTime: string, timeZone: string): DateTime<true> =>
   DateTime.fromISO(isoDateTime, { zone: timeZone, locale: get(locale) }) as DateTime<true>;
 
-export const fromISODateTimeToObject = (isoDateTime: string, timeZone: string): TimelinePlainDateTime =>
+export const fromISODateTimeToObject = (isoDateTime: string, timeZone: string): TimelineDateTime =>
   (fromISODateTime(isoDateTime, timeZone) as DateTime<true>).toObject();
 
 // used for AssetResponseDto.localDateTime, amongst others
 export const fromISODateTimeUTC = (isoDateTimeUtc: string) => fromISODateTime(isoDateTimeUtc, 'UTC');
 
-export const fromISODateTimeUTCToObject = (isoDateTimeUtc: string): TimelinePlainDateTime =>
+export const fromISODateTimeUTCToObject = (isoDateTimeUtc: string): TimelineDateTime =>
   (fromISODateTimeUTC(isoDateTimeUtc) as DateTime<true>).toObject();
 
 // used to create equivalent of AssetResponseDto.localDateTime in UTC, but without timezone information
 export const fromISODateTimeTruncateTZToObject = (
   isoDateTimeUtc: string,
   timeZone: string | undefined,
-): TimelinePlainDateTime =>
+): TimelineDateTime =>
   (
     fromISODateTime(isoDateTimeUtc, timeZone ?? 'UTC').setZone('UTC', { keepLocalTime: true }) as DateTime<true>
   ).toObject();
 
 // Used to derive a local date time from an ISO string and a UTC offset in hours
-export const fromISODateTimeWithOffsetToObject = (
-  isoDateTimeUtc: string,
-  utcOffsetHours: number,
-): TimelinePlainDateTime => {
+export const fromISODateTimeWithOffsetToObject = (isoDateTimeUtc: string, utcOffsetHours: number): TimelineDateTime => {
   const utcDateTime = fromISODateTimeUTC(isoDateTimeUtc);
 
   // Apply the offset to get the local time
@@ -82,23 +79,23 @@ export const getTimes = (isoDateTimeUtc: string, localUtcOffsetHours: number) =>
   };
 };
 
-export const fromTimelinePlainDateTime = (timelineDateTime: TimelinePlainDateTime): DateTime<true> =>
+export const fromTimelinePlainDateTime = (timelineDateTime: TimelineDateTime): DateTime<true> =>
   DateTime.fromObject(timelineDateTime, { zone: 'local', locale: get(locale) }) as DateTime<true>;
 
-export const fromTimelinePlainDate = (timelineYearMonth: TimelinePlainDate): DateTime<true> =>
+export const fromTimelinePlainDate = (timelineYearMonth: TimelineDate): DateTime<true> =>
   DateTime.fromObject(
     { year: timelineYearMonth.year, month: timelineYearMonth.month, day: timelineYearMonth.day },
     { zone: 'local', locale: get(locale) },
   ) as DateTime<true>;
 
-export const fromTimelinePlainYearMonth = (timelineYearMonth: TimelinePlainYearMonth): DateTime<true> =>
+export const fromTimelinePlainYearMonth = (timelineYearMonth: TimelineYearMonth): DateTime<true> =>
   DateTime.fromObject(
     { year: timelineYearMonth.year, month: timelineYearMonth.month },
     { zone: 'local', locale: get(locale) },
   ) as DateTime<true>;
 
-export const toISOYearMonthUTC = (timelineYearMonth: TimelinePlainYearMonth): string =>
-  (fromTimelinePlainYearMonth(timelineYearMonth).setZone('UTC', { keepLocalTime: true }) as DateTime<true>).toISO();
+export const toISOYearMonthUTC = ({ year, month }: TimelineYearMonth): string =>
+  `${year}-${month.toString().padStart(2, '0')}-01T00:00:00.000Z`;
 
 export function formatMonthGroupTitle(_date: DateTime): string {
   if (!_date.isValid) {
@@ -193,7 +190,7 @@ export const toTimelineAsset = (unknownAsset: AssetResponseDto | TimelineAsset):
 export const isTimelineAsset = (unknownAsset: AssetResponseDto | TimelineAsset): unknownAsset is TimelineAsset =>
   (unknownAsset as TimelineAsset).ratio !== undefined;
 
-export const plainDateTimeCompare = (ascending: boolean, a: TimelinePlainDateTime, b: TimelinePlainDateTime) => {
+export const plainDateTimeCompare = (ascending: boolean, a: TimelineDateTime, b: TimelineDateTime) => {
   const [aDateTime, bDateTime] = ascending ? [a, b] : [b, a];
 
   if (aDateTime.year !== bDateTime.year) {