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This commit is contained in:
Andras Schmelczer 2026-09-26 20:22:19 +01:00
commit ca905ac1ce
8 changed files with 181 additions and 202 deletions
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2
frontend/sync-client/src/persistence/database.test.ts
View file

@ -63,7 +63,7 @@ test("old state loads without duplicate flags, full recovery content, or acknowl
deferred: { deferred: {
base: undefined, base: undefined,
observedHash: undefined, observedHash: undefined,
remote: { ...head, documentId: "deferred" } remote: { vaultUpdateId: head.vaultUpdateId, contentSize: head.contentSize }
} }
}); });
assert.equal(saved.lastSeenUpdateId, 2); assert.equal(saved.lastSeenUpdateId, 2);

31
frontend/sync-client/src/persistence/database.ts
View file

@ -1,11 +1,6 @@
import type { PendingRequest, UnconfirmedRequest } from "./requests";
import { upgradeState } from "./upgrade-state"; import { upgradeState } from "./upgrade-state";
import type { StoredSnapshot } from "../snapshot";
import type { DocumentUpdateResponse } from "../services/types/DocumentUpdateResponse";
import type { DocumentVersionWithoutContent } from "../services/types/DocumentVersionWithoutContent";
import type { FileManifest } from "../services/types/FileManifest"; import type { FileManifest } from "../services/types/FileManifest";
import type { FileManifestUpdateResponse } from "../services/types/FileManifestUpdateResponse";
import type { PushFileManifest } from "../services/types/PushFileManifest";
import type { PutFileContent } from "../services/types/PutFileContent";
import type { FileManifestEntries } from "../types/file-manifest-entries"; import type { FileManifestEntries } from "../types/file-manifest-entries";
export type VaultUpdateId = number; export type VaultUpdateId = number;
@ -17,29 +12,21 @@ export interface DocumentMetadata {
hash: string; hash: string;
} }
export interface ContentHead {
vaultUpdateId: number;
contentSize: number;
}
export interface DocumentState { export interface DocumentState {
/** A null version retains only the clean hash after a server history reset. */ /** A null version retains only the clean hash after a server history reset. */
base?: { vaultUpdateId: number | null; hash: string }; base?: { vaultUpdateId: number | null; hash: string };
/** Last observed disk hash; an empty string means a notification awaits scanning. */ /** Last observed disk hash; an empty string means a notification awaits scanning. */
observedHash?: string; observedHash?: string;
/** A remote version still to be incorporated, including excluded downloads. */ /** A remote version still to be incorporated, including excluded downloads. */
remote?: DocumentVersionWithoutContent; remote?: ContentHead;
} }
export type PendingRequest = { rejection?: string } & ( export type { PendingRequest, UnconfirmedRequest } from "./requests";
| {
type: "content";
documentId: string;
request: PutFileContent;
snapshot: StoredSnapshot;
response?: DocumentUpdateResponse;
}
| {
type: "fileManifest";
request: PushFileManifest;
response?: FileManifestUpdateResponse;
}
);
export interface EngineState { export interface EngineState {
vaultKey: string; vaultKey: string;
@ -50,7 +37,7 @@ export interface EngineState {
lastSeenUpdateId?: number; lastSeenUpdateId?: number;
pending?: PendingRequest; pending?: PendingRequest;
/** A rejected retry does not prove an earlier attempt failed to commit. */ /** A rejected retry does not prove an earlier attempt failed to commit. */
unconfirmed?: PendingRequest[]; unconfirmed?: UnconfirmedRequest[];
/** Commits consumption of the saved notification queue with the identity map. */ /** Commits consumption of the saved notification queue with the identity map. */
lastAppliedLocalChangeId?: string; lastAppliedLocalChangeId?: string;
/** Original server paths while local files are excluded; null means absent. */ /** Original server paths while local files are excluded; null means absent. */

21
frontend/sync-client/src/persistence/requests.ts Normal file
View file

@ -0,0 +1,21 @@
import type { PutFileContent } from "../services/types/PutFileContent";
import type { PushFileManifest } from "../services/types/PushFileManifest";
import type { FileManifestEntries } from "../types/file-manifest-entries";
/** Exact wire payload and the hash needed to advance the base after acknowledgement. */
export type PendingRequest =
| { type: "content"; documentId: string; request: PutFileContent; hash: string }
| { type: "fileManifest"; request: PushFileManifest };
/** Enough to recognize a late receipt or suppress an unchanged rejected submission. */
export type UnconfirmedRequest = { requestId: string; rejection?: string } & (
| { type: "content"; documentId: string; hash: string }
| { type: "fileManifest"; entries: FileManifestEntries }
);
export function requestReceipt(request: PendingRequest, rejection?: string): UnconfirmedRequest {
const receipt = { requestId: request.request.requestId, rejection };
return request.type === "content"
? { ...receipt, type: "content", documentId: request.documentId, hash: request.hash }
: { ...receipt, type: "fileManifest", entries: request.request.entries };
}

91
frontend/sync-client/src/persistence/upgrade-state.ts
View file

@ -1,57 +1,72 @@
import type { DocumentState, EngineState } from "./database"; import type { ContentHead, DocumentState, EngineState } from "./database";
import { requestReceipt, type PendingRequest, type UnconfirmedRequest } from "./requests";
import type { StoredSnapshot } from "../snapshot"; import type { StoredSnapshot } from "../snapshot";
import type { DocumentVersionWithoutContent } from "../services/types/DocumentVersionWithoutContent";
/** Read the previous redundant state once; all subsequent saves use the smaller format. */ type PreviousRequest = PendingRequest & {
snapshot?: StoredSnapshot;
response?: unknown;
rejection?: string;
};
function upgradeRequest(request: PreviousRequest): PendingRequest {
return request.type === "content"
? {
type: "content", documentId: request.documentId,
request: request.request, hash: request.snapshot?.hash ?? request.hash
}
: { type: "fileManifest", request: request.request };
}
/** Normalize earlier stores at the boundary; none of their duplicate data is saved again. */
export function upgradeState(state: EngineState): EngineState { export function upgradeState(state: EngineState): EngineState {
if (!("initialized" in state)) return state; // eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion -- Read previous persisted schemas at the migration boundary.
// eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion -- Read the previous persisted schema at the migration boundary. const legacy = state as Omit<EngineState, "pending" | "unconfirmed" | "documents"> & {
const legacy = state as EngineState & { initialized?: boolean;
initialized: boolean;
historyRecovery?: boolean; historyRecovery?: boolean;
remoteHeads?: Record<string, DocumentVersionWithoutContent>; remoteHeads?: Record<string, ContentHead>;
documents: Record< pending?: PreviousRequest;
string, unconfirmed?: (UnconfirmedRequest | PreviousRequest)[];
DocumentState & { documents: Record<string, DocumentState & {
materialized?: boolean; materialized?: boolean;
bootstrap?: boolean; bootstrap?: boolean;
recoveryBase?: StoredSnapshot; recoveryBase?: StoredSnapshot;
} }>;
>;
}; };
const next: EngineState = { const next: EngineState = {
vaultKey: state.vaultKey, vaultKey: state.vaultKey,
fileManifest: state.fileManifest, fileManifest: state.fileManifest,
local: state.local, local: state.local,
documents: {}, documents: {},
lastSeenUpdateId: lastSeenUpdateId: "initialized" in legacy &&
legacy.initialized && legacy.historyRecovery !== true (!legacy.initialized || legacy.historyRecovery === true)
? state.lastSeenUpdateId ? undefined : state.lastSeenUpdateId,
: undefined, pending: legacy.pending && upgradeRequest(legacy.pending),
pending: state.pending, unconfirmed: legacy.unconfirmed?.map((request) =>
unconfirmed: state.unconfirmed, "request" in request
? requestReceipt(upgradeRequest(request), request.rejection)
: request
),
lastAppliedLocalChangeId: state.lastAppliedLocalChangeId, lastAppliedLocalChangeId: state.lastAppliedLocalChangeId,
excluded: state.excluded excluded: state.excluded
}; };
for (const [id, doc] of Object.entries(legacy.documents)) { if (legacy.pending?.rejection && !legacy.pending.response) {
(next.unconfirmed ??= []).push(requestReceipt(upgradeRequest(legacy.pending), legacy.pending.rejection));
delete next.pending;
}
for (const id of new Set([...Object.keys(legacy.documents), ...Object.keys(legacy.remoteHeads ?? {})])) {
const doc = legacy.documents[id] ?? {};
const base = doc.recoveryBase const base = doc.recoveryBase
? { vaultUpdateId: null, hash: doc.recoveryBase.hash } ? { vaultUpdateId: null, hash: doc.recoveryBase.hash }
: doc.base && doc.bootstrap !== true : doc.base && doc.bootstrap !== true
? { vaultUpdateId: doc.base.vaultUpdateId, hash: doc.base.hash } ? { vaultUpdateId: doc.base.vaultUpdateId, hash: doc.base.hash }
: undefined; : undefined;
next.documents[id] = { const observedHash = "materialized" in doc
base, ? doc.materialized === true ? doc.observedHash ?? "" : undefined
observedHash: : doc.observedHash;
doc.materialized === true ? (doc.observedHash ?? "") : undefined const remote = doc.remote ?? legacy.remoteHeads?.[id];
}; next.documents[id] = { base, observedHash };
} if (remote && (observedHash === undefined || remote.vaultUpdateId > (base?.vaultUpdateId ?? 0)))
for (const [id, remote] of Object.entries(legacy.remoteHeads ?? {})) { next.documents[id].remote = { vaultUpdateId: remote.vaultUpdateId, contentSize: remote.contentSize };
const doc = (next.documents[id] ??= {});
if (
doc.observedHash === undefined ||
remote.vaultUpdateId > (doc.base?.vaultUpdateId ?? 0)
)
doc.remote = remote;
} }
return next; return next;
} }

6
frontend/sync-client/src/sync-operations/syncer.test.ts
View file

@ -210,10 +210,10 @@ describe("Syncer per-file state and event delivery", () => {
const { syncer } = fixture(); const { syncer } = fixture();
const projected = ( const projected = (
syncer as unknown as { syncer as unknown as {
documentHead: (value: typeof head) => Record<string, unknown>; contentHead: (value: typeof head) => Record<string, unknown>;
} }
).documentHead({ ...head, contentBase64: "secret" } as typeof head); ).contentHead({ ...head, contentBase64: "secret" } as typeof head);
assert.deepEqual(projected, head); assert.deepEqual(projected, { vaultUpdateId: head.vaultUpdateId, contentSize: head.contentSize });
assert.strictEqual("contentBase64" in projected, false); assert.strictEqual("contentBase64" in projected, false);
}); });
}); });

210
frontend/sync-client/src/sync-operations/syncer.ts
View file

@ -1,12 +1,15 @@
import { requestReceipt } from "../persistence/requests";
import type { SyncHistory } from "../tracing/sync-history"; import type { SyncHistory } from "../tracing/sync-history";
import { SyncStatus, SyncType } from "../tracing/sync-history"; import { SyncStatus, SyncType } from "../tracing/sync-history";
import { v4 as uuid } from "uuid"; import { v4 as uuid } from "uuid";
import { base64ToBytes } from "byte-base64"; import { base64ToBytes } from "byte-base64";
import { diff } from "reconcile-text"; import { diff, undiff } from "reconcile-text";
import type { import type {
Database, Database,
EngineState, EngineState,
PendingRequest PendingRequest,
UnconfirmedRequest,
ContentHead
} from "../persistence/database"; } from "../persistence/database";
import { emptyState } from "../persistence/database"; import { emptyState } from "../persistence/database";
import { toStoredSnapshot, type StoredSnapshot } from "../snapshot"; import { toStoredSnapshot, type StoredSnapshot } from "../snapshot";
@ -504,9 +507,9 @@ export class Syncer {
private async incorporateEventBatch(batch: EventBatch): Promise<void> { private async incorporateEventBatch(batch: EventBatch): Promise<void> {
let cursor = this.database.state.lastSeenUpdateId ?? 0; let cursor = this.database.state.lastSeenUpdateId ?? 0;
let manifest = this.database.state.fileManifest; let manifest = this.database.state.fileManifest;
const heads: Record<string, DocumentVersionWithoutContent> = {}; const heads: Record<string, ContentHead> = {};
for (const doc of Object.values(this.database.state.documents)) for (const [id, doc] of Object.entries(this.database.state.documents))
if (doc.remote) heads[doc.remote.documentId] = doc.remote; if (doc.remote) heads[id] = doc.remote;
const receipts: EventRecord[] = []; const receipts: EventRecord[] = [];
// Fold every page before touching local files. If fetching is interrupted, // Fold every page before touching local files. If fetching is interrupted,
// discard this work and retry from the last committed cursor. // discard this work and retry from the last committed cursor.
@ -522,7 +525,7 @@ export class Syncer {
if ( if (
this.database.state.unconfirmed?.some( this.database.state.unconfirmed?.some(
(pending) => (pending) =>
pending.request.requestId === event.requestId pending.requestId === event.requestId
) === true ) === true
) )
receipts.push(event); receipts.push(event);
@ -537,7 +540,7 @@ export class Syncer {
heads[event.document.documentId].vaultUpdateId < heads[event.document.documentId].vaultUpdateId <
event.document.vaultUpdateId event.document.vaultUpdateId
) { ) {
heads[event.document.documentId] = this.documentHead( heads[event.document.documentId] = this.contentHead(
event.document event.document
); );
} }
@ -558,7 +561,7 @@ export class Syncer {
let acknowledged = false; let acknowledged = false;
for (const event of receipts) { for (const event of receipts) {
const pending = next.unconfirmed?.find( const pending = next.unconfirmed?.find(
(candidate) => candidate.request.requestId === event.requestId (candidate) => candidate.requestId === event.requestId
); );
if (!pending) continue; if (!pending) continue;
if (event.type === "content" && pending.type === "content") { if (event.type === "content" && pending.type === "content") {
@ -569,14 +572,9 @@ export class Syncer {
) { ) {
doc.base = { doc.base = {
vaultUpdateId: event.eventId, vaultUpdateId: event.eventId,
hash: pending.snapshot.hash hash: pending.hash
}; };
this.clearRejections(next, pending.documentId); this.clearRejections(next, pending.documentId);
await this.cacheContent(
event.eventId,
next.local[pending.documentId],
base64ToBytes(pending.snapshot.contentBase64)
);
} }
} else if ( } else if (
event.type === "fileManifest" && event.type === "fileManifest" &&
@ -599,24 +597,21 @@ export class Syncer {
await this.reconcile(manifest, { cursor, heads }); await this.reconcile(manifest, { cursor, heads });
} }
private documentHead( private contentHead(
version: DocumentVersionWithoutContent version: ContentHead
): DocumentVersionWithoutContent { ): ContentHead {
return { return {
vaultUpdateId: version.vaultUpdateId, vaultUpdateId: version.vaultUpdateId,
documentId: version.documentId,
updatedDate: version.updatedDate,
userId: version.userId,
deviceId: version.deviceId,
contentSize: version.contentSize contentSize: version.contentSize
}; };
} }
private recordManifestApplication( private recordManifestApplication(
before: Readonly<Record<string, string>>, before: Readonly<Record<string, string>>,
writes: Readonly<Record<string, FileWrite>> after: Readonly<Record<string, string>>,
writes: Readonly<Record<string, FileWrite>>,
message: string
): void { ): void {
const after = this.database.state.local;
for (const id of new Set([ for (const id of new Set([
...Object.keys(before), ...Object.keys(before),
...Object.keys(after) ...Object.keys(after)
@ -626,7 +621,7 @@ export class Syncer {
if (from === to && !writes[id]) continue; if (from === to && !writes[id]) continue;
this.history.addHistoryEntry({ this.history.addHistoryEntry({
status: SyncStatus.SUCCESS, status: SyncStatus.SUCCESS,
message: "Remote change applied", message,
details: details:
from && to && from !== to from && to && from !== to
? { ? {
@ -660,18 +655,19 @@ export class Syncer {
private async contentWrite( private async contentWrite(
next: EngineState, next: EngineState,
head: DocumentVersionWithoutContent, id: string,
head: ContentHead,
path: string path: string
): Promise<FileWrite | undefined> { ): Promise<FileWrite | undefined> {
const document = (next.documents[head.documentId] ??= {}); const document = (next.documents[id] ??= {});
if ( if (
next.excluded?.[head.documentId] !== undefined || next.excluded?.[id] !== undefined ||
this.settings.isIgnored(path) || this.settings.isIgnored(path) ||
this.settings.isOversized(head.contentSize) this.settings.isOversized(head.contentSize)
) { ) {
return undefined; return undefined;
} }
const currentPath = this.database.state.local[head.documentId]; const currentPath = this.database.state.local[id];
const local = const local =
currentPath && currentPath &&
(await this.files.fs.stat(currentPath))?.kind === "file" (await this.files.fs.stat(currentPath))?.kind === "file"
@ -695,7 +691,7 @@ export class Syncer {
? local ? local
: await this.remoteSnapshot( : await this.remoteSnapshot(
{ {
documentId: head.documentId, documentId: id,
vaultUpdateId: document.base.vaultUpdateId vaultUpdateId: document.base.vaultUpdateId
}, },
path path
@ -703,7 +699,7 @@ export class Syncer {
: undefined; : undefined;
// Cache the new head after the older merge base so it remains the most // Cache the new head after the older merge base so it remains the most
// recently used version and can back the follow-up local diff. // recently used version and can back the follow-up local diff.
const remote = await this.remoteSnapshot(head, path); const remote = await this.remoteSnapshot({ documentId: id, vaultUpdateId: head.vaultUpdateId }, path);
let result = remote; let result = remote;
if (local !== undefined) { if (local !== undefined) {
result = await mergeContent( result = await mergeContent(
@ -736,7 +732,7 @@ export class Syncer {
cursor?: number; cursor?: number;
initial?: VaultSnapshot; initial?: VaultSnapshot;
clearPending?: boolean; clearPending?: boolean;
heads?: Record<string, DocumentVersionWithoutContent>; heads?: Record<string, ContentHead>;
} = {} } = {}
): Promise<void> { ): Promise<void> {
validateFileManifest(remote.entries); validateFileManifest(remote.entries);
@ -763,8 +759,8 @@ export class Syncer {
const previousManifest = next.fileManifest.entries; const previousManifest = next.fileManifest.entries;
next.local = mergeFileManifests(base, next.local, remote.entries); next.local = mergeFileManifests(base, next.local, remote.entries);
next.fileManifest = remote; next.fileManifest = remote;
for (const head of Object.values(heads ?? {})) for (const [id, head] of Object.entries(heads ?? {}))
(next.documents[head.documentId] ??= {}).remote = head; (next.documents[id] ??= {}).remote = head;
for (const [id, oldPath] of Object.entries(before)) { for (const [id, oldPath] of Object.entries(before)) {
const path = next.local[id]; const path = next.local[id];
if ( if (
@ -794,7 +790,7 @@ export class Syncer {
if (initial) { if (initial) {
for (const head of initial.documents) for (const head of initial.documents)
(next.documents[head.documentId] ??= {}).remote = (next.documents[head.documentId] ??= {}).remote =
this.documentHead(head); this.contentHead(head);
} }
const writes: Record<string, FileWrite> = {}; const writes: Record<string, FileWrite> = {};
for (const [id, path] of Object.entries(next.local)) { for (const [id, path] of Object.entries(next.local)) {
@ -825,15 +821,15 @@ export class Syncer {
`File manifest references missing content: ${id}` `File manifest references missing content: ${id}`
); );
} }
doc.remote = this.documentHead(head); doc.remote = this.contentHead(head);
const write = await this.contentWrite(next, head, path); const write = await this.contentWrite(next, id, head, path);
if (write) { if (write) {
writes[id] = write; writes[id] = write;
} }
} }
} }
await this.files.apply(next, writes, guard); await this.files.apply(next, writes, guard);
this.recordManifestApplication(before, writes); this.recordManifestApplication(before, this.database.state.local, writes, "Remote change applied");
} }
private async preparePush(): Promise<boolean> { private async preparePush(): Promise<boolean> {
@ -899,7 +895,7 @@ export class Syncer {
(request) => (request) =>
request.type === "content" && request.type === "content" &&
request.documentId === id && request.documentId === id &&
request.snapshot.hash === snapshot.hash request.hash === snapshot.hash
) )
) { ) {
continue; continue;
@ -910,7 +906,7 @@ export class Syncer {
pending: { pending: {
type: "content", type: "content",
documentId: id, documentId: id,
snapshot, hash: snapshot.hash,
request: { request: {
requestId: uuid(), requestId: uuid(),
parentVersionId: base?.vaultUpdateId ?? null, parentVersionId: base?.vaultUpdateId ?? null,
@ -935,7 +931,7 @@ export class Syncer {
!this.rejections.some( !this.rejections.some(
(request) => (request) =>
request.type === "fileManifest" && request.type === "fileManifest" &&
sameFileManifest(entries, request.request.entries) sameFileManifest(entries, request.entries)
) )
) { ) {
guard(); guard();
@ -988,7 +984,7 @@ export class Syncer {
); );
} }
private get rejections(): PendingRequest[] { private get rejections(): UnconfirmedRequest[] {
return (this.database.state.unconfirmed ?? []).filter( return (this.database.state.unconfirmed ?? []).filter(
(request) => request.rejection !== undefined (request) => request.rejection !== undefined
); );
@ -1003,8 +999,8 @@ export class Syncer {
const doc = state.documents[id]; const doc = state.documents[id];
if ( if (
path !== undefined && path !== undefined &&
doc?.observedHash === request.snapshot.hash && doc?.observedHash === request.hash &&
doc.base?.hash !== request.snapshot.hash && doc.base?.hash !== request.hash &&
!this.settings.isIgnored(path) && !this.settings.isIgnored(path) &&
state.excluded?.[id] === undefined state.excluded?.[id] === undefined
) )
@ -1012,11 +1008,11 @@ export class Syncer {
} else if ( } else if (
sameFileManifest( sameFileManifest(
this.manifestToSubmit(), this.manifestToSubmit(),
request.request.entries request.entries
) && ) &&
!sameFileManifest( !sameFileManifest(
state.fileManifest.entries, state.fileManifest.entries,
request.request.entries request.entries
) )
) )
return request.rejection; return request.rejection;
@ -1043,55 +1039,40 @@ export class Syncer {
await this.database.commit(next); await this.database.commit(next);
} }
private async finishPending(): Promise<void> { private async sendPending<T>(pending: PendingRequest, send: () => Promise<T>): Promise<T | undefined> {
let { pending } = this.database.state; try {
if (!pending) { return await send();
return; } catch (error) {
} if (!(error instanceof PermanentSyncError)) throw error;
if (!pending.response && !pending.rejection) {
const copy = structuredClone(pending);
try {
if (copy.type === "content") {
copy.response = await this.service.putFileContent(
copy.documentId,
copy.request
);
} else {
copy.response = await this.service.pushFileManifest(
copy.request
);
}
} catch (error) {
if (!(error instanceof PermanentSyncError)) throw error;
copy.rejection = error.message;
}
await this.database.commit({ ...this.next(), pending: copy });
pending = copy;
}
if (pending.rejection && !pending.response) {
const next = this.next(); const next = this.next();
(next.unconfirmed ??= []).push(pending); (next.unconfirmed ??= []).push(requestReceipt(pending, error.message));
delete next.pending; delete next.pending;
await this.database.commit(next); await this.database.commit(next);
this.history.addHistoryEntry({ this.history.addHistoryEntry({
status: SyncStatus.ERROR, status: SyncStatus.ERROR,
message: pending.rejection, message: error.message,
details: { details: {
type: SyncType.SKIPPED, type: SyncType.SKIPPED,
relativePath: relativePath: pending.type === "content"
pending.type === "content" ? (next.local[pending.documentId] ?? pending.documentId)
? (next.local[pending.documentId] ?? : "File manifest"
pending.documentId)
: "File manifest"
} }
}); });
return; return;
} }
}
private async finishPending(): Promise<void> {
const { pending } = this.database.state;
if (!pending) return;
// Responses are ephemeral. An interrupted application retries the exact
// saved request and gets its original acknowledgement from the server.
if (pending.type === "fileManifest") { if (pending.type === "fileManifest") {
const response = pending.response!; const response = await this.sendPending(pending, async () =>
this.service.pushFileManifest(pending.request));
if (!response) return;
if (response.type === "StaleBase") { if (response.type === "StaleBase") {
await this.reconcile(response, { clearPending: true }); await this.reconcile(response, { clearPending: true });
} else { } else {
@ -1104,68 +1085,32 @@ export class Syncer {
delete next.pending; delete next.pending;
const previous = this.database.state.fileManifest.entries; const previous = this.database.state.fileManifest.entries;
await this.database.commit(next); await this.database.commit(next);
for (const id of new Set([ this.recordManifestApplication(previous, next.fileManifest.entries, {}, "File manifest change committed");
...Object.keys(previous),
...Object.keys(next.fileManifest.entries)
])) {
const before = previous[id],
after = next.fileManifest.entries[id];
if (before === after) {
continue;
}
this.history.addHistoryEntry({
status: SyncStatus.SUCCESS,
message: "File manifest change committed",
details:
after === undefined
? {
type: SyncType.DELETE,
relativePath: before
}
: before === undefined
? {
type: SyncType.CREATE,
relativePath: after
}
: {
type: SyncType.MOVE,
relativePath: after,
movedFrom: before
}
});
}
} }
} else { } else {
const response = pending.response!; const response = await this.sendPending(pending, async () =>
this.service.putFileContent(pending.documentId, pending.request));
if (!response) return;
if (response.type === "StaleBase") { if (response.type === "StaleBase") {
await this.reconcile(this.database.state.fileManifest, { await this.reconcile(this.database.state.fileManifest, {
clearPending: true, clearPending: true,
heads: { [pending.documentId]: this.documentHead(response) } heads: { [pending.documentId]: this.contentHead(response) }
}); });
} else { } else {
const next = this.next(); const next = this.next();
const doc = (next.documents[pending.documentId] ??= {}); const doc = (next.documents[pending.documentId] ??= {});
doc.base = { doc.base = { vaultUpdateId: response.vaultUpdateId, hash: pending.hash };
vaultUpdateId: response.vaultUpdateId,
hash: pending.snapshot.hash
};
this.clearRejections(next, pending.documentId); this.clearRejections(next, pending.documentId);
delete doc.remote; delete doc.remote;
delete next.pending; delete next.pending;
await this.database.commit(next); await this.database.commit(next);
const path = next.local[pending.documentId]; await this.cacheSubmission(pending, response.vaultUpdateId);
await this.cacheContent(
response.vaultUpdateId,
path,
base64ToBytes(pending.snapshot.contentBase64)
);
this.history.addHistoryEntry({ this.history.addHistoryEntry({
status: SyncStatus.SUCCESS, status: SyncStatus.SUCCESS,
message: "Content committed", message: "Content committed",
details: { details: {
type: SyncType.UPDATE, type: SyncType.UPDATE,
relativePath: relativePath: next.local[pending.documentId] ?? pending.documentId
next.local[pending.documentId] ?? pending.documentId
}, },
author: response.userId, author: response.userId,
timestamp: new Date(response.updatedDate) timestamp: new Date(response.updatedDate)
@ -1173,4 +1118,19 @@ export class Syncer {
} }
} }
} }
/** Warm the optional diff cache using the wire payload, never another saved copy. */
private async cacheSubmission(pending: Extract<PendingRequest, { type: "content" }>, version: number): Promise<void> {
const { content, parentVersionId } = pending.request;
let bytes: Uint8Array;
if (content.type === "Snapshot") bytes = base64ToBytes(content.value);
else {
const parent = parentVersionId === null ? undefined : this.contentCache.get(parentVersionId);
// A restart may have evicted the parent. Future uploads can use snapshots.
if (!parent) return;
const text = new TextDecoder("utf-8", { fatal: true, ignoreBOM: true }).decode(parent);
bytes = new TextEncoder().encode(undiff(text, content.value));
}
await this.cacheContent(version, this.database.state.local[pending.documentId], bytes);
}
} }

11
frontend/test-support/engine-regressions.test.ts
View file

@ -55,8 +55,10 @@ test("offline content notifications need no saves and restart reads the current
const pending = internals.database.state.pending; const pending = internals.database.state.pending;
assert(pending?.type === "content"); assert(pending?.type === "content");
assert.equal(pending.documentId, "a"); assert.equal(pending.documentId, "a");
assert.equal(pending.request.content.type, "Snapshot");
assert(pending.request.content.type === "Snapshot");
assert.equal( assert.equal(
Buffer.from(pending.snapshot.contentBase64, "base64").toString(), Buffer.from(pending.request.content.value, "base64").toString(),
"latest offline bytes" "latest offline bytes"
); );
} finally { } finally {
@ -144,6 +146,7 @@ test("remote binary replacement and deletion do not create backup artifacts", as
test("rejected content recovery remains idempotent across a rename and network failure", async () => { test("rejected content recovery remains idempotent across a rename and network failure", async () => {
let offline = true; let offline = true;
const f = await fixture(undefined, { const f = await fixture(undefined, {
putFileContent: async () => ({ type: "StaleBase", ...head("a", 2, "remote") }),
getDocumentVersionContent: async () => { getDocumentVersionContent: async () => {
if (offline) throw new Error("offline"); if (offline) throw new Error("offline");
return bytes("base"); return bytes("base");
@ -157,15 +160,11 @@ test("rejected content recovery remains idempotent across a rename and network f
f.database.state.pending = { f.database.state.pending = {
type: "content", type: "content",
documentId: "a", documentId: "a",
snapshot, hash: snapshot.hash,
request: { request: {
requestId: "request", requestId: "request",
parentVersionId: 1, parentVersionId: 1,
content: { type: "Snapshot", value: snapshot.contentBase64 } content: { type: "Snapshot", value: snapshot.contentBase64 }
},
response: {
type: "StaleBase",
...head("a", 2, "remote")
} }
}; };
await f.database.save(); await f.database.save();

11
frontend/test-support/sync-audit.test.ts
View file

@ -529,8 +529,8 @@ test("an ignored occupant arriving after the scan keeps its path and privacy", a
const { pending } = f.database.state; const { pending } = f.database.state;
assert( assert(
pending?.type !== "content" || pending?.type !== "content" ||
Buffer.from(pending.snapshot.contentBase64, "base64").toString() !== pending.request.content.type !== "Snapshot" ||
"SECRET" Buffer.from(pending.request.content.value, "base64").toString() !== "SECRET"
); );
}); });
@ -820,11 +820,8 @@ for (const boundary of ["before:save", "durable:save"]) {
...database.state, ...database.state,
unconfirmed: [{ unconfirmed: [{
type: "fileManifest", type: "fileManifest",
request: { requestId: "rejected",
requestId: "rejected", entries: { retired: "old.md" },
parentFileManifestId: 0,
entries: { retired: "old.md" }
},
rejection: "retired rejection" rejection: "retired rejection"
}] }]
}); });