fix: make hosted downloads controllable and failures diagnosable

apps/app-frontend/src/helpers/hosted-download-controls.test.ts

@@ -0,0 +1,96 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+
+import {
+	hostedDownloadActions,
+	hostedDownloadState,
+	runHostedDownloadAction,
+	runHostedDownloadControl,
+} from './hosted-download-controls.ts'
+
+test('only a controllable parent hosted task offers pause, resume and stop', () => {
+	const bar = {
+		bar_type: {
+			type: 'hosted_pack_sync',
+			instance_id: 'one',
+			state: 'running' as const,
+			can_pause: true,
+			can_cancel: true,
+		},
+	}
+	assert.deepEqual(hostedDownloadActions(bar), ['pause', 'cancel'])
+	assert.deepEqual(hostedDownloadActions({ bar_type: { ...bar.bar_type, state: 'paused' } }), [
+		'resume',
+		'cancel',
+	])
+	for (const state of ['finalizing', 'canceling'] as const) {
+		assert.deepEqual(hostedDownloadActions({ bar_type: { ...bar.bar_type, state } }), [])
+	}
+	assert.deepEqual(
+		hostedDownloadActions({ bar_type: { ...bar.bar_type, type: 'hosted_mod_download' } }),
+		[],
+	)
+	assert.deepEqual(
+		hostedDownloadActions({ bar_type: { type: 'hosted_pack_sync', instance_id: 'one' } }),
+		[],
+	)
+})
+
+test('failed and canceled hosted tasks offer direct retry, preserving terminal state', () => {
+	for (const state of ['failed', 'canceled'] as const) {
+		const bar = {
+			bar_type: { type: 'hosted_pack_sync', instance_id: 'one', state, error: 'failure' },
+		}
+		assert.deepEqual(hostedDownloadActions(bar), ['retry'])
+		assert.equal(hostedDownloadState(bar), state)
+	}
+	assert.equal(hostedDownloadState({ bar_type: { error: 'old backend failure' } }), 'failed')
+})
+
+test('resume refreshes the session before invoking controls; pause and stop need no session', async () => {
+	const calls: string[] = []
+	const deps = {
+		prepareSession: async () => {
+			calls.push('session')
+		},
+		invoke: async (command: string, args: { instanceId: string }) => {
+			calls.push(`${command}:${args.instanceId}`)
+		},
+	}
+	await runHostedDownloadControl('resume', 'one', deps)
+	await runHostedDownloadControl('pause', 'one', deps)
+	await runHostedDownloadControl('cancel', 'one', deps)
+	assert.deepEqual(calls, [
+		'session',
+		'plugin:install|hosted_resume:one',
+		'plugin:install|hosted_pause:one',
+		'plugin:install|hosted_cancel:one',
+	])
+})
+
+test('session refresh failures prevent resume', async () => {
+	await assert.rejects(
+		runHostedDownloadControl('resume', 'one', {
+			prepareSession: async () => {
+				throw new Error('signed out')
+			},
+			invoke: async () => {
+				assert.fail('resume must not run')
+			},
+		}),
+		/signed out/,
+	)
+})
+
+test('retry immediately restarts the existing hosted instance through the manager', async () => {
+	const calls: string[] = []
+	await runHostedDownloadAction('retry', 'existing-instance', {
+		retryHosted: async (instanceId) => {
+			calls.push(instanceId)
+		},
+		control: async () => {
+			assert.fail('retry must use the full hosted transaction')
+		},
+	})
+	assert.deepEqual(calls, ['existing-instance'])
+})

apps/app-frontend/src/helpers/hosted-download-controls.ts

@@ -0,0 +1,45 @@
+import type { LoadingBar } from './state.ts'
+
+export type HostedDownloadControl = 'pause' | 'resume' | 'cancel'
+export type HostedDownloadAction = HostedDownloadControl | 'retry'
+
+export function runHostedDownloadAction(
+	action: HostedDownloadAction,
+	instanceId: string,
+	operations: {
+		retryHosted: (instanceId: string) => Promise<void>
+		control: (action: HostedDownloadControl, instanceId: string) => Promise<void>
+	},
+) {
+	return action === 'retry'
+		? operations.retryHosted(instanceId)
+		: operations.control(action, instanceId)
+}
+
+export function hostedDownloadState(bar: LoadingBar) {
+	return bar.bar_type?.state ?? (bar.bar_type?.error ? 'failed' : 'running')
+}
+
+export function hostedDownloadActions(bar: LoadingBar): HostedDownloadAction[] {
+	const type = bar.bar_type
+	if (type?.type !== 'hosted_pack_sync' || !type.instance_id) return []
+	const state = hostedDownloadState(bar)
+	if (state === 'failed' || state === 'canceled') return ['retry']
+	if (state !== 'running' && state !== 'paused') return []
+	const actions: HostedDownloadAction[] = []
+	if (type.can_pause) actions.push(state === 'paused' ? 'resume' : 'pause')
+	if (type.can_cancel) actions.push('cancel')
+	return actions
+}
+
+export async function runHostedDownloadControl(
+	action: HostedDownloadControl,
+	instanceId: string,
+	dependencies: {
+		prepareSession: () => Promise<void>
+		invoke: (command: string, args: { instanceId: string }) => Promise<void>
+	},
+) {
+	if (action === 'resume') await dependencies.prepareSession()
+	await dependencies.invoke(`plugin:install|hosted_${action}`, { instanceId })
+}

apps/app-frontend/src/helpers/hosted-download-failures.test.ts

@@ -3,6 +3,27 @@ import test from 'node:test'
 
 import { createHostedDownloadFailures } from './hosted-download-failures.ts'
 
+test('stopped hosted downloads retain their state and instance for direct retry', () => {
+	const state = createHostedDownloadFailures()
+	state.update({
+		fraction: null,
+		loader_uuid: 'stopped',
+		event: {
+			type: 'hosted_pack_sync',
+			instance_id: 'existing-instance',
+			state: 'canceled',
+			error: 'Stopped by user',
+			can_pause: false,
+			can_cancel: false,
+		},
+	})
+	assert.equal(state.values()[0]?.bar_type?.state, 'canceled')
+	assert.equal(state.values()[0]?.bar_type?.instance_id, 'existing-instance')
+	state.begin('existing-instance', state.values())
+	assert.equal(state.has('existing-instance'), false)
+	assert.equal(state.isRetired('stopped'), true)
+})
+
 test('retry clears only its own failure before progress arrives and ignores late old events', () => {
 	const state = createHostedDownloadFailures()
 	const failed = (instanceId: string, loader: string, error: string) => ({

apps/app-frontend/src/helpers/hosted-packs.ts

@@ -8,6 +8,7 @@ import {
 	skinSiteUser,
 	waitForSkinSiteSession,
 } from '../composables/skin-site-session.ts'
+import { type HostedDownloadControl, runHostedDownloadControl } from './hosted-download-controls.ts'
 import { authenticateInstancePlayer } from './instance-player.ts'
 
 export const HOSTED_ACCOUNT_REQUIRED_MESSAGE = '您需要登录正版或皮肤站账号后才能操作'
@@ -146,6 +147,11 @@ export const hostedCreate = async (gameDirRoot?: string | null) => {
 }
 export const hostedBinding = (instanceId: string) =>
 	invokeHosted<HostedBinding | null>('plugin:install|hosted_binding', { instanceId })
+export const controlHostedDownload = (action: HostedDownloadControl, instanceId: string) =>
+	runHostedDownloadControl(action, instanceId, {
+		prepareSession: prepareHostedSession,
+		invoke: invokeHosted<void>,
+	})
 export const hostedSync = async (instanceId: string) => {
 	await requireHostedGameAccount()
 	startHostedPackAttempt(instanceId)

apps/app-frontend/src/helpers/state.ts

@@ -9,6 +9,9 @@ export interface LoadingBarType {
 	batch_id?: string
 	file_name?: string
 	error?: string | null
+	state?: 'running' | 'paused' | 'canceling' | 'canceled' | 'failed' | 'finalizing'
+	can_pause?: boolean
+	can_cancel?: boolean
 	type?: string
 	version?: string
 	instance_id?: string
@@ -28,7 +31,12 @@ export interface LoadingBar {
 }
 
 export type OpeningCommandEvent =
-	'RunMRPack' | 'InstallServer' | 'InstallVersion' | 'InstallMod' | 'InstallModpack' | string
+	| 'RunMRPack'
+	| 'InstallServer'
+	| 'InstallVersion'
+	| 'InstallMod'
+	| 'InstallModpack'
+	| string
 
 export interface OpeningCommand {
 	event: OpeningCommandEvent

apps/app-frontend/src/locales/en-US/index.json

@@ -1,4 +1,8 @@
 {
+  "app.hosted-packs.progress.pause": { "message": "Pause" },
+  "app.hosted-packs.progress.resume": { "message": "Resume" },
+  "app.hosted-packs.progress.stop": { "message": "Stop" },
+  "app.downloads.status.paused": { "message": "Paused" },
   "app.skin-site.captcha.loading": { "message": "Loading captcha…" },
   "app.skin-site.captcha.submit": { "message": "Submit" },
   "app.skin-site.captcha.subtitle": {

apps/app-frontend/src/locales/zh-CN/index.json

@@ -1,4 +1,8 @@
 {
+  "app.hosted-packs.progress.pause": { "message": "暂停" },
+  "app.hosted-packs.progress.resume": { "message": "继续" },
+  "app.hosted-packs.progress.stop": { "message": "停止" },
+  "app.downloads.status.paused": { "message": "已暂停" },
   "app.skin-site.captcha.loading": { "message": "正在加载验证码…" },
   "app.skin-site.captcha.submit": { "message": "验证" },
   "app.skin-site.captcha.subtitle": {

apps/app-frontend/src/pages/Downloads.vue

@@ -84,7 +84,7 @@
 					</TagItem>
 					<Badge
 						:color="bar.bar_type?.error ? 'red' : 'orange'"
-						:type="statusLabel(bar.bar_type?.error ? 'failed' : 'running')"
+						:type="statusLabel(hostedDownloadState(bar))"
 					/>
 				</div>
 				<ProgressBar
@@ -94,16 +94,35 @@
 					:progress="legacyPercent(bar)"
 					:max="100"
 					:label="formatMessage(messages.progress)"
-					:waiting="!bar.total"
+					:waiting="!bar.total && hostedDownloadState(bar) !== 'paused'"
 					:show-progress="Boolean(bar.total)"
 				/>
-				<RouterLink
-					v-else
-					:to="hostedRetryRoute(bar.bar_type?.instance_id ?? '')"
-					class="mt-3 inline-block text-brand hover:underline"
+				<div
+					v-if="hostedDownloadActions(bar).length"
+					class="mt-3 flex flex-wrap items-center gap-2"
 				>
-					{{ formatMessage(messages.hostedRetry) }}
-				</RouterLink>
+					<ButtonStyled
+						v-for="action in hostedDownloadActions(bar)"
+						:key="action"
+						:color="action === 'retry' ? 'brand' : action === 'cancel' ? 'red' : 'standard'"
+						:type="action === 'retry' ? 'standard' : 'outlined'"
+						size="small"
+					>
+						<button
+							:disabled="busy.has(hostedBusyKey(bar, action))"
+							@click="hostedAction(bar, action)"
+						>
+							{{ formatMessage(hostedActionMessages[action]) }}
+						</button>
+					</ButtonStyled>
+					<RouterLink
+						v-if="bar.bar_type?.error"
+						:to="hostedRetryRoute(bar.bar_type.instance_id ?? '')"
+						class="text-brand hover:underline"
+					>
+						{{ formatMessage(messages.openInstance) }}
+					</RouterLink>
+				</div>
 			</Card>
 
 			<Card
@@ -471,7 +490,14 @@ import { useRoute, useRouter } from 'vue-router'
 import MissingModpackContentModal from '@/components/ui/modal/MissingModpackContentModal.vue'
 import { listPendingCurseForgeManualDownloads } from '@/helpers/curseforge'
 import type { CurseForgeManualDownloadItem } from '@/helpers/curseforge-manual'
+import {
+	type HostedDownloadAction,
+	hostedDownloadActions,
+	hostedDownloadState,
+	runHostedDownloadAction,
+} from '@/helpers/hosted-download-controls'
 import { hostedRetryRoute } from '@/helpers/hosted-install-retry'
+import { controlHostedDownload } from '@/helpers/hosted-packs'
 import {
 	download_job_support_details,
 	type InstallJobSnapshot,
@@ -517,10 +543,6 @@ const focusedJobId = computed(() => focusedDownloadJobId(route.query.job))
 const focusState = ref(createDownloadFocusState(focusedJobId.value))
 
 const messages = defineMessages({
-	hostedRetry: {
-		id: 'app.hosted-packs.progress.retry',
-		defaultMessage: 'Return to the instance to retry',
-	},
 	newDownload: { id: 'app.downloads.new-download', defaultMessage: 'New download' },
 	inProgress: { id: 'app.downloads.in-progress', defaultMessage: 'In progress' },
 	history: { id: 'app.downloads.history', defaultMessage: 'History' },
@@ -653,7 +675,15 @@ const messages = defineMessages({
 	unknownPhase: { id: 'app.downloads.phase.unknown', defaultMessage: 'Working' },
 })
 
+const hostedActionMessages = defineMessages({
+	pause: { id: 'app.hosted-packs.progress.pause', defaultMessage: 'Pause' },
+	resume: { id: 'app.hosted-packs.progress.resume', defaultMessage: 'Resume' },
+	cancel: { id: 'app.hosted-packs.progress.stop', defaultMessage: 'Stop' },
+	retry: { id: 'app.downloads.retry', defaultMessage: 'Retry' },
+})
+
 const statusMessages = defineMessages({
+	paused: { id: 'app.downloads.status.paused', defaultMessage: 'Paused' },
 	queued: { id: 'app.downloads.status.queued', defaultMessage: 'Queued' },
 	running: { id: 'app.downloads.status.running', defaultMessage: 'Running' },
 	canceling: { id: 'app.downloads.status.canceling', defaultMessage: 'Canceling' },
@@ -1262,6 +1292,7 @@ function toggleExpanded(jobId: string) {
 }
 
 async function withBusy(jobId: string, action: () => Promise<void>) {
+	if (busy.value.has(jobId)) return
 	busy.value = new Set([...busy.value, jobId])
 	try {
 		await action()
@@ -1278,6 +1309,21 @@ async function cancel(job: InstallJobSnapshot) {
 	await withBusy(job.job_id, () => manager.cancel(job.job_id))
 }
 
+function hostedBusyKey(bar: LoadingBar, action: HostedDownloadAction) {
+	return `hosted-${action === 'retry' ? 'retry' : 'control'}:${bar.bar_type?.instance_id}`
+}
+
+async function hostedAction(bar: LoadingBar, action: HostedDownloadAction) {
+	const instanceId = bar.bar_type?.instance_id
+	if (!instanceId || !hostedDownloadActions(bar).includes(action)) return
+	await withBusy(hostedBusyKey(bar, action), () =>
+		runHostedDownloadAction(action, instanceId, {
+			retryHosted: manager.retryHosted,
+			control: controlHostedDownload,
+		}),
+	)
+}
+
 async function retry(job: InstallJobSnapshot) {
 	await withBusy(job.job_id, () => manager.retry(job.job_id))
 }
@@ -1293,12 +1339,14 @@ async function resolveMissing(job: InstallJobSnapshot) {
 				(item) =>
 					item.status === 'skipped' && item.manual_url && item.project_id && item.version_id,
 			)
-			.map((item): CurseForgeManualDownloadItem => ({
-				projectId: Number(item.project_id),
-				fileId: Number(item.version_id),
-				fileName: item.name,
-				websiteUrl: item.manual_url ?? undefined,
-			}))
+			.map(
+				(item): CurseForgeManualDownloadItem => ({
+					projectId: Number(item.project_id),
+					fileId: Number(item.version_id),
+					fileName: item.name,
+					websiteUrl: item.manual_url ?? undefined,
+				}),
+			)
 		const instanceId = job.instance_id
 		const hasGeneralMissingItems = job.items.some((item) => item.status === 'failed')
 		if (instanceId && (job.provider === 'curse_forge' || fallbackCurseForgeItems.length > 0)) {

apps/app/build.rs

@@ -380,6 +380,9 @@ fn main() {
                         "hosted_create",
                         "hosted_binding",
                         "hosted_sync",
+                        "hosted_pause",
+                        "hosted_resume",
+                        "hosted_cancel",
                         "hosted_instance_mode",
                         "hosted_set_instance_mode",
                         "install_pack_to_existing_instance",

apps/app/src/api/install.rs

@@ -20,6 +20,9 @@ pub fn init<R: tauri::Runtime>() -> tauri::plugin::TauriPlugin<R> {
             hosted_create,
             hosted_binding,
             hosted_sync,
+            hosted_pause,
+            hosted_resume,
+            hosted_cancel,
             hosted_instance_mode,
             hosted_set_instance_mode,
             install_get_modpack_preview,
@@ -105,6 +108,21 @@ pub async fn hosted_sync(
     Ok(theseus::pack::hosted::synchronize(&instance_id).await?)
 }
 
+#[tauri::command]
+pub async fn hosted_pause(instance_id: String) -> Result<()> {
+    Ok(theseus::pack::hosted::pause(&instance_id).await?)
+}
+
+#[tauri::command]
+pub async fn hosted_resume(instance_id: String) -> Result<()> {
+    Ok(theseus::pack::hosted::resume(&instance_id).await?)
+}
+
+#[tauri::command]
+pub async fn hosted_cancel(instance_id: String) -> Result<()> {
+    Ok(theseus::pack::hosted::cancel(&instance_id).await?)
+}
+
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct InstallCreateInstanceRequest {