From c546c107af08e5be8eb08aa46633a6548860f27f Mon Sep 17 00:00:00 2001
From: Varun Patil <varunpatil@ucla.edu>
Date: Tue, 18 Oct 2022 10:42:44 -0700
Subject: [PATCH] Add on this day to top of timeline (#41)

---
 src/components/Timeline.vue             |  13 +-
 src/components/top-matter/OnThisDay.vue | 253 ++++++++++++++++++++++++
 src/services/DavRequests.ts             |  29 +--
 src/services/Viewer.ts                  |  10 +-
 4 files changed, 283 insertions(+), 22 deletions(-)
 create mode 100644 src/components/top-matter/OnThisDay.vue

diff --git a/src/components/Timeline.vue b/src/components/Timeline.vue
index 0b805db6..f01e82e5 100644
--- a/src/components/Timeline.vue
+++ b/src/components/Timeline.vue
@@ -32,6 +32,11 @@
                      v-show="!$refs.topmatter.type && list.length > 0">
                     {{ getViewName() }}
                 </div>
+
+                <OnThisDay v-if="$route.name === 'timeline'"
+                           :viewerManager="viewerManager"
+                           @load="scrollerManager.adjust()">
+                </OnThisDay>
             </template>
 
             <template v-slot="{ item }">
@@ -109,6 +114,7 @@ import Folder from "./frame/Folder.vue";
 import Tag from "./frame/Tag.vue";
 import Photo from "./frame/Photo.vue";
 import TopMatter from "./top-matter/TopMatter.vue";
+import OnThisDay from "./top-matter/OnThisDay.vue";
 import SelectionManager from './SelectionManager.vue';
 import ScrollerManager from './ScrollerManager.vue';
 import UserConfig from "../mixins/UserConfig";
@@ -128,6 +134,7 @@ const MOBILE_NUM_COLS = 3;              // Number of columns on phone
         Tag,
         Photo,
         TopMatter,
+        OnThisDay,
         SelectionManager,
         ScrollerManager,
         NcEmptyContent,
@@ -915,9 +922,9 @@ export default class Timeline extends Mixins(GlobalMixin, UserConfig) {
      * @param delPhotos photos to delete
      */
     async deleteFromViewWithAnimation(delPhotos: IPhoto[]) {
-        if (delPhotos.length === 0) {
-            return;
-        }
+        // Only keep photos with day
+        delPhotos = delPhotos.filter(p => p.d);
+        if (delPhotos.length === 0) return;
 
         // Get all days that need to be updatd
         const updatedDays = new Set<IDay>(delPhotos.map(p => p.d));
diff --git a/src/components/top-matter/OnThisDay.vue b/src/components/top-matter/OnThisDay.vue
new file mode 100644
index 00000000..39b12022
--- /dev/null
+++ b/src/components/top-matter/OnThisDay.vue
@@ -0,0 +1,253 @@
+<template>
+    <div class="outer" v-show="years.length > 0">
+        <div class="inner" ref="inner">
+            <div v-for="year of years" class="group" :key="year.year" @click="click(year)">
+                <img class="fill-block"
+                    :src="year.url" />
+
+                <div class="overlay">
+                    {{ year.text }}
+                </div>
+            </div>
+        </div>
+
+        <div class="left-btn dir-btn memories__onthisday__btn" v-if="hasLeft">
+            <NcActions>
+                <NcActionButton
+                    :aria-label="t('memories', 'Move left')"
+                    @click="moveLeft">
+                    {{ t('memories', 'Move left') }}
+                    <template #icon> <LeftMoveIcon :size="28" /> </template>
+                </NcActionButton>
+            </NcActions>
+        </div>
+        <div class="right-btn dir-btn memories__onthisday__btn" v-if="hasRight">
+            <NcActions>
+                <NcActionButton
+                    :aria-label="t('memories', 'Move right')"
+                    @click="moveRight">
+                    {{ t('memories', 'Move right') }}
+                    <template #icon> <RightMoveIcon :size="28" /> </template>
+                </NcActionButton>
+            </NcActions>
+        </div>
+    </div>
+</template>
+
+<script lang="ts">
+import { Component, Emit, Mixins, Prop } from 'vue-property-decorator';
+import GlobalMixin from '../../mixins/GlobalMixin';
+import { NcActions, NcActionButton } from '@nextcloud/vue';
+
+import * as utils from "../../services/Utils";
+import * as dav from '../../services/DavRequests';
+import { ViewerManager } from "../../services/Viewer";
+import { IPhoto } from '../../types';
+import { getPreviewUrl } from "../../services/FileUtils";
+
+import LeftMoveIcon from 'vue-material-design-icons/ChevronLeft.vue';
+import RightMoveIcon from 'vue-material-design-icons/ChevronRight.vue';
+
+interface IYear {
+    year: number;
+    url: string;
+    preview: IPhoto;
+    photos: IPhoto[];
+    text: string;
+};
+
+@Component({
+    name: 'OnThisDay',
+    components: {
+        NcActions,
+        NcActionButton,
+        LeftMoveIcon,
+        RightMoveIcon,
+    }
+})
+export default class OnThisDay extends Mixins(GlobalMixin) {
+    private getPreviewUrl = getPreviewUrl;
+
+    @Emit('load')
+    onload() {}
+
+    private years: IYear[] = []
+
+    private hasRight = false;
+    private hasLeft = false;
+    private scrollStack: number[] = [];
+
+    /**
+     * Nextcloud viewer proxy
+     * Can't use the timeline instance because these photos
+     * might not be in view, so can't delete them
+     */
+    @Prop()
+    private viewerManager!: ViewerManager;
+
+    mounted() {
+        const inner = this.$refs.inner as HTMLElement;
+        inner.addEventListener('scroll', this.onScroll.bind(this));
+
+        this.refresh();
+    }
+
+    async refresh() {
+        const photos = await dav.getOnThisDayRaw();
+        let currentYear = 9999;
+
+        for (const photo of photos) {
+            const dateTaken = utils.dayIdToDate(photo.dayid);
+            const year = dateTaken.getUTCFullYear();
+
+            if (year !== currentYear) {
+                this.years.push({
+                    year,
+                    url: '',
+                    preview: photo,
+                    photos: [],
+                    text: utils.getFromNowStr(dateTaken),
+                });
+                currentYear = year;
+            }
+
+            const yearObj = this.years[this.years.length - 1];
+            yearObj.photos.push(photo);
+        }
+
+        // Randomly choose preview photo
+        for (const year of this.years) {
+            const index = Math.floor(Math.random() * year.photos.length);
+            year.preview = year.photos[index];
+            year.url = getPreviewUrl(year.preview.fileid, year.preview.etag, false, 512);
+        }
+
+        await this.$nextTick();
+        this.onScroll();
+        this.onload();
+    }
+
+    moveLeft() {
+        const inner = this.$refs.inner as HTMLElement;
+        inner.scrollBy(-(this.scrollStack.pop() || inner.clientWidth), 0);
+    }
+
+    moveRight() {
+        const inner = this.$refs.inner as HTMLElement;
+        const innerRect = inner.getBoundingClientRect();
+        const nextChild = Array.from(inner.children).map(c => c.getBoundingClientRect()).find((rect) =>
+            rect.right > innerRect.right
+        );
+
+        let scroll = nextChild ? (nextChild.left - innerRect.left) : inner.clientWidth;
+        scroll = Math.min(inner.scrollWidth - inner.scrollLeft - inner.clientWidth, scroll);
+        this.scrollStack.push(scroll);
+        inner.scrollBy(scroll, 0);
+    }
+
+    onScroll() {
+        const inner = this.$refs.inner as HTMLElement;
+        if (!inner) return;
+        this.hasLeft = inner.scrollLeft > 0;
+        this.hasRight = (inner.clientWidth + inner.scrollLeft < inner.scrollWidth - 20);
+    }
+
+    click(year: IYear) {
+        const allPhotos = this.years.flatMap(y => y.photos);
+        this.viewerManager.open(year.preview, allPhotos);
+    }
+}
+</script>
+
+<style lang="scss" scoped>
+$height: 200px;
+
+.outer {
+    width: calc(100% - 50px);
+    height: $height;
+    overflow: hidden;
+    position: relative;
+    padding: 0 calc(28px * 0.6);
+
+    // Sloppy: ideally this should be done in Timeline
+    // to put a gap between the title and this
+    margin-top: 8px;
+
+    .inner {
+        height: calc(100% + 20px);
+        white-space: nowrap;
+        overflow-x: scroll;
+        scroll-behavior: smooth;
+        border-radius: 10px;
+    }
+
+    .left-btn {
+        position: absolute;
+        top: 50%; left: 0;
+        transform: translate(-10%, -50%);
+    }
+
+    .right-btn {
+        position: absolute;
+        top: 50%; right: 0;
+        transform: translate(10%, -50%);
+    }
+
+    @media (max-width: 768px) {
+        width: 98%;
+        padding: 0;
+        .inner { padding: 0 8px; }
+        .dir-btn { display: none; }
+    }
+}
+
+.group {
+    height: $height;
+    aspect-ratio: 4/3;
+    display: inline-block;
+    position: relative;
+    cursor: pointer;
+
+    &:not(:last-of-type) { margin-right: 6px; }
+
+    img {
+        cursor: inherit;
+        object-fit: cover;
+        border-radius: 10px;
+        background-color: var(--color-background-dark);
+        background-clip: padding-box, content-box;
+    }
+
+    .overlay {
+        position: absolute;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        background-color: rgba(0, 0, 0, 0.2);
+        border-radius: 10px;
+        display: flex;
+        align-items: end;
+        justify-content: center;
+        color: white;
+        font-size: 1.2em;
+        font-weight: bold;
+        padding-bottom: 5%;
+        text-shadow: 0 0 2px black;
+        cursor: inherit;
+        transition: background-color 0.2s ease-in-out;
+    }
+
+    &:hover .overlay {
+        background-color: transparent;
+    }
+}
+</style>
+
+<style lang="scss">
+.memories__onthisday__btn button {
+    transform: scale(0.6);
+    box-shadow: black 0 0 3px 0 !important;
+    background-color: var(--color-main-background) !important;
+}
+</style>
\ No newline at end of file
diff --git a/src/services/DavRequests.ts b/src/services/DavRequests.ts
index 9a1ecc3b..d0cd8ce0 100644
--- a/src/services/DavRequests.ts
+++ b/src/services/DavRequests.ts
@@ -391,11 +391,10 @@ export async function downloadFilesByIds(fileIds: number[]) {
 }
 
 /**
- * Get the onThisDay data
- * Query for last 120 years; should be enough
+ * Get original onThisDay response.
  */
-export async function getOnThisDayData(): Promise<IDay[]> {
-    const diffs: { [dayId: number]: number } = {};
+export async function getOnThisDayRaw() {
+    const dayIds: number[] = [];
     const now = new Date();
     const nowUTC = new Date(now.getTime() - now.getTimezoneOffset() * 60000);
 
@@ -407,20 +406,22 @@ export async function getOnThisDayData(): Promise<IDay[]> {
             d.setFullYear(d.getFullYear() - i);
             d.setDate(d.getDate() + j);
             const dayId = Math.floor(d.getTime() / 1000 / 86400)
-            diffs[dayId] = i;
+            dayIds.push(dayId);
         }
     }
 
+    return (await axios.post<IPhoto[]>(generateUrl('/apps/memories/api/days'), {
+        body_ids: dayIds.join(','),
+    })).data;
+}
+
+/**
+ * Get the onThisDay data
+ * Query for last 120 years; should be enough
+ */
+export async function getOnThisDayData(): Promise<IDay[]> {
     // Query for photos
-    let data: IPhoto[] = [];
-    try {
-        const res = await axios.post<IPhoto[]>(generateUrl('/apps/memories/api/days'), {
-            body_ids: Object.keys(diffs).join(','),
-        });
-        data = res.data;
-    } catch (e) {
-        throw e;
-    }
+    let data = await getOnThisDayRaw();
 
     // Group photos by day
     const ans: IDay[] = [];
diff --git a/src/services/Viewer.ts b/src/services/Viewer.ts
index 9fddd61e..699c9945 100644
--- a/src/services/Viewer.ts
+++ b/src/services/Viewer.ts
@@ -21,19 +21,19 @@ export class ViewerManager {
         });
     }
 
-    public async open(photo: IPhoto) {
-        const day = photo.d;
-        if (!day) return;
+    public async open(photo: IPhoto, list?: IPhoto[]) {
+        list = list || photo.d?.detail;
+        if (!list) return;
 
         // Repopulate map
         this.photoMap.clear();
-        for (const p of day.detail) {
+        for (const p of list) {
             this.photoMap.set(p.fileid, p);
         }
 
         // Get file infos
         let fileInfos: IFileInfo[];
-        const ids = day.detail.map(p => p.fileid);
+        const ids = list.map(p => p.fileid);
         try {
             this.updateLoading(1);
             fileInfos = await dav.getFiles(ids);