Add selection download function

src/components/Timeline.vue

@@ -72,6 +72,14 @@
                 {{ selection.size }} item(s) selected
             </div>
 
+            <NcActions>
+                <NcActionButton
+                    :aria-label="t('memories', 'Download selection')"
+                    @click="downloadSelection"
+                    class="icon-download">
+                    {{ t('memories', 'Download') }}
+                </NcActionButton>
+            </NcActions>
             <NcActions>
                 <NcActionButton
                     :aria-label="t('memories', 'Delete selection')"
@@ -752,6 +760,17 @@ export default {
             await this.deleteFromViewWithAnimation(delIds, updatedDays);
         },
 
+        /** Download the selected files */
+        async downloadSelection() {
+            if (this.selection.size === 0) {
+                return;
+            }
+
+            // Get files to download
+            const fileInfos = await dav.getFiles([...this.selection].map(p => p.fileid));
+            await dav.downloadFiles(fileInfos.map(f => f.filename));
+        },
+
         /**
          * Delete elements from main view with some animation
          * This function looks horribly slow, probably isn't that bad

src/services/DavRequests.js

@@ -1,4 +1,5 @@
 import { getCurrentUser } from '@nextcloud/auth'
+import { generateUrl } from '@nextcloud/router'
 import { genFileInfo } from './FileUtils'
 import client from './DavClient';
 
@@ -135,3 +136,37 @@ export async function deleteFile(path) {
     const prefixPath = `/files/${getCurrentUser().uid}`;
     return await client.deleteFile(`${prefixPath}${path}`);
 }
+
+/**
+ * Download a file
+ *
+ * @param {string[]} fileNames - The file's names
+ */
+ export async function downloadFiles(fileNames) {
+	const randomToken = Math.random().toString(36).substring(2)
+
+	const params = new URLSearchParams()
+	params.append('files', JSON.stringify(fileNames))
+	params.append('downloadStartSecret', randomToken)
+
+	const downloadURL = generateUrl(`/apps/files/ajax/download.php?${params}`)
+
+	window.location = `${downloadURL}downloadStartSecret=${randomToken}`
+
+	return new Promise((resolve) => {
+		const waitForCookieInterval = setInterval(
+			() => {
+				const cookieIsSet = document.cookie
+					.split(';')
+					.map(cookie => cookie.split('='))
+					.findIndex(([cookieName, cookieValue]) => cookieName === 'ocDownloadStarted' && cookieValue === randomToken)
+
+				if (cookieIsSet) {
+					clearInterval(waitForCookieInterval)
+					resolve(true)
+				}
+			},
+			50
+		)
+	})
+}