Heavy background jobs of other apps pause while a backup runs

Reserved in Nextcloud's job list, so no app is turned off and a job that is running goes on.
At most 6 hours in a row, then they get an hour; Nextcloud ends a reservation by itself after
12 hours, should the end of a pause never come. On by default, with a setting to turn it off.

src/api.js

@@ -34,6 +34,7 @@ export default {
 	setTargetLimit: (id, maxGb) => call('put', `/targets/${id}/limit`, { maxGb }),
 	startBackup: (targetId, label) => call('post', '/backups', { targetId, label }),
 	tick: () => call('post', '/tick'),
+	setPauseHeavyJobs: (enabled) => call('put', '/settings/pause-heavy-jobs', { enabled }),
 	setTargetSchedule: (id, schedule, timezone) => call('put', `/targets/${id}/schedule`, { schedule, timezone }),
 	snapshots: (targetId) => call('get', `/targets/${targetId}/snapshots`),
 	setSnapshotNote: (targetId, snapshotId, note) => call('put', `/targets/${targetId}/snapshots/${snapshotId}/note`, { note }),

src/components/Backups.vue

@@ -6,6 +6,10 @@
 	<NcSettingsSection :name="t('ng_backup', 'Backups')"
 		:description="t('ng_backup', 'Backups run in the background through Nextcloud\'s cron. Unchanged files are not read again; only new data is uploaded.')">
 		<LocationScheduleRow v-for="target in status.targets" :key="target.id" :target="target" @changed="emit('changed')" @error="error = $event" />
+		<NcCheckboxRadioSwitch :model-value="status.heavyJobs.enabled" @update:model-value="savePause">
+			{{ t('ng_backup', 'Pause heavy background jobs (Memories, Recognize, Preview Generator, full text search, antivirus scan) while a backup runs, at most 6 hours in a row') }}
+		</NcCheckboxRadioSwitch>
+		<p v-if="status.heavyJobs.jobs.length" class="ngb-muted">{{ t('ng_backup', 'Paused now: {jobs}', { jobs: status.heavyJobs.jobs.join(', ') }) }}</p>
 		<div class="ngb-row">
 			<NcTextField v-model="label" class="ngb-label" :maxlength="100" :label="t('ng_backup', 'Label (optional)')"
 				:placeholder="t('ng_backup', 'e.g. before the upgrade to Nextcloud 35')" />
@@ -60,6 +64,7 @@
 import { ref } from 'vue'
 import { n, t } from '@nextcloud/l10n'
 import NcButton from '@nextcloud/vue/components/NcButton'
+import NcCheckboxRadioSwitch from '@nextcloud/vue/components/NcCheckboxRadioSwitch'
 import NcNoteCard from '@nextcloud/vue/components/NcNoteCard'
 import NcSettingsSection from '@nextcloud/vue/components/NcSettingsSection'
 import NcTextField from '@nextcloud/vue/components/NcTextField'
@@ -101,6 +106,16 @@ const runStatus = (run) => {
 const isRunning = (targetId) => props.status.runs.some(r => r.targetId === targetId && r.kind === 'full' && r.status === 'running')
 const targetName = (id) => props.status.targets.find(tg => tg.id === id)?.name ?? '#' + id
 
+async function savePause(enabled) {
+	error.value = ''
+	try {
+		await api.setPauseHeavyJobs(enabled)
+		emit('changed')
+	} catch (e) {
+		error.value = e.message
+	}
+}
+
 async function start(target) {
 	error.value = ''
 	try {