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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,185 +1,194 @@ | ||
| import { Subscription } from '@atproto/xrpc-server' | ||
| import { cborToLexRecord, readCar } from '@atproto/repo' | ||
| import { BlobRef } from '@atproto/lexicon' | ||
| import { ids, lexicons } from '../lexicon/lexicons' | ||
| import { Record as PostRecord } from '../lexicon/types/app/bsky/feed/post' | ||
| import { Record as RepostRecord } from '../lexicon/types/app/bsky/feed/repost' | ||
| import { Record as LikeRecord } from '../lexicon/types/app/bsky/feed/like' | ||
| import { Record as FollowRecord } from '../lexicon/types/app/bsky/graph/follow' | ||
| import { | ||
| Commit, | ||
| OutputSchema as RepoEvent, | ||
| isCommit, | ||
| } from '../lexicon/types/com/atproto/sync/subscribeRepos' | ||
| import { Database } from '../db' | ||
|
|
||
| export abstract class FirehoseSubscriptionBase { | ||
| public sub: Subscription<RepoEvent> | ||
|
|
||
| constructor(public db: Database, public service: string) { | ||
| this.sub = new Subscription({ | ||
| service: service, | ||
| method: ids.ComAtprotoSyncSubscribeRepos, | ||
| getParams: () => this.getCursor(), | ||
| validate: (value: unknown) => { | ||
| try { | ||
| return lexicons.assertValidXrpcMessage<RepoEvent>( | ||
| ids.ComAtprotoSyncSubscribeRepos, | ||
| value, | ||
| ) | ||
| } catch (err) { | ||
| console.error('repo subscription skipped invalid message', err) | ||
| } | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| abstract handleEvent(evt: RepoEvent): Promise<void> | ||
|
|
||
| async run(subscriptionReconnectDelay: number) { | ||
| try { | ||
| for await (const evt of this.sub) { | ||
| try { | ||
| this.handleEvent(evt) // no longer awaiting this | ||
| } catch (err) { | ||
| console.error('repo subscription could not handle message', err) | ||
| } | ||
| // update stored cursor every 20 events or so | ||
| if (isCommit(evt) && evt.seq % 20 === 0) { | ||
| await this.updateCursor(evt.seq) | ||
| } | ||
| } | ||
| } catch (err) { | ||
| console.error('repo subscription errored', err) | ||
| setTimeout( | ||
| () => this.run(subscriptionReconnectDelay), | ||
| subscriptionReconnectDelay, | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| async updateCursor(cursor: number) { | ||
| await this.db.updateSubStateCursor(this.service, cursor) | ||
| } | ||
|
|
||
| async getCursor(): Promise<{ cursor?: number }> { | ||
| const res = await this.db.getSubStateCursor(this.service) | ||
| return res ? { cursor: res.cursor } : {} | ||
| } | ||
| } | ||
|
|
||
| export const getOpsByType = async (evt: Commit): Promise<OperationsByType> => { | ||
| const car = await readCar(evt.blocks) | ||
| const opsByType: OperationsByType = { | ||
| posts: { creates: [], deletes: [] }, | ||
| reposts: { creates: [], deletes: [] }, | ||
| likes: { creates: [], deletes: [] }, | ||
| follows: { creates: [], deletes: [] }, | ||
| } | ||
|
|
||
| for (const op of evt.ops) { | ||
| const uri = `at://${evt.repo}/${op.path}` | ||
| const [collection] = op.path.split('/') | ||
|
|
||
| if (op.action === 'update') continue // updates not supported yet | ||
|
|
||
| if (op.action === 'create') { | ||
| if (!op.cid) continue | ||
| const recordBytes = car.blocks.get(op.cid) | ||
| if (!recordBytes) continue | ||
| const record = cborToLexRecord(recordBytes) | ||
| const create = { uri, cid: op.cid.toString(), author: evt.repo } | ||
| if (collection === ids.AppBskyFeedPost && isPost(record)) { | ||
| opsByType.posts.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyFeedRepost && isRepost(record)) { | ||
| opsByType.reposts.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyFeedLike && isLike(record)) { | ||
| opsByType.likes.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyGraphFollow && isFollow(record)) { | ||
| opsByType.follows.creates.push({ record, ...create }) | ||
| } | ||
| } | ||
|
|
||
| if (op.action === 'delete') { | ||
| if (collection === ids.AppBskyFeedPost) { | ||
| opsByType.posts.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyFeedRepost) { | ||
| opsByType.reposts.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyFeedLike) { | ||
| opsByType.likes.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyGraphFollow) { | ||
| opsByType.follows.deletes.push({ uri }) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return opsByType | ||
| } | ||
|
|
||
| type OperationsByType = { | ||
| posts: Operations<PostRecord> | ||
| reposts: Operations<RepostRecord> | ||
| likes: Operations<LikeRecord> | ||
| follows: Operations<FollowRecord> | ||
| } | ||
|
|
||
| type Operations<T = Record<string, unknown>> = { | ||
| creates: CreateOp<T>[] | ||
| deletes: DeleteOp[] | ||
| } | ||
|
|
||
| type CreateOp<T> = { | ||
| uri: string | ||
| cid: string | ||
| author: string | ||
| record: T | ||
| } | ||
|
|
||
| type DeleteOp = { | ||
| uri: string | ||
| } | ||
|
|
||
| export const isPost = (obj: unknown): obj is PostRecord => { | ||
| return isType(obj, ids.AppBskyFeedPost) | ||
| } | ||
|
|
||
| export const isRepost = (obj: unknown): obj is RepostRecord => { | ||
| return isType(obj, ids.AppBskyFeedRepost) | ||
| } | ||
|
|
||
| export const isLike = (obj: unknown): obj is LikeRecord => { | ||
| return isType(obj, ids.AppBskyFeedLike) | ||
| } | ||
|
|
||
| export const isFollow = (obj: unknown): obj is FollowRecord => { | ||
| return isType(obj, ids.AppBskyGraphFollow) | ||
| } | ||
|
|
||
| const isType = (obj: unknown, nsid: string) => { | ||
| try { | ||
| lexicons.assertValidRecord(nsid, fixBlobRefs(obj)) | ||
| return true | ||
| } catch (err) { | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| // @TODO right now record validation fails on BlobRefs | ||
| // simply because multiple packages have their own copy | ||
| // of the BlobRef class, causing instanceof checks to fail. | ||
| // This is a temporary solution. | ||
| const fixBlobRefs = (obj: unknown): unknown => { | ||
| if (Array.isArray(obj)) { | ||
| return obj.map(fixBlobRefs) | ||
| } | ||
| if (obj && typeof obj === 'object') { | ||
| if (obj.constructor.name === 'BlobRef') { | ||
| const blob = obj as BlobRef | ||
| return new BlobRef(blob.ref, blob.mimeType, blob.size, blob.original) | ||
| } | ||
| return Object.entries(obj).reduce((acc, [key, val]) => { | ||
| return Object.assign(acc, { [key]: fixBlobRefs(val) }) | ||
| }, {} as Record<string, unknown>) | ||
| } | ||
| return obj | ||
| } | ||
| import { Subscription } from '@atproto/xrpc-server' | ||
| import { cborToLexRecord, readCar } from '@atproto/repo' | ||
| import { BlobRef } from '@atproto/lexicon' | ||
| import { ids, lexicons } from '../lexicon/lexicons' | ||
| import { Record as PostRecord } from '../lexicon/types/app/bsky/feed/post' | ||
| import { Record as RepostRecord } from '../lexicon/types/app/bsky/feed/repost' | ||
| import { Record as LikeRecord } from '../lexicon/types/app/bsky/feed/like' | ||
| import { Record as FollowRecord } from '../lexicon/types/app/bsky/graph/follow' | ||
| import { | ||
| Commit, | ||
| OutputSchema as RepoEvent, | ||
| isCommit, | ||
| } from '../lexicon/types/com/atproto/sync/subscribeRepos' | ||
| import { Database } from '../db' | ||
|
|
||
| export abstract class FirehoseSubscriptionBase { | ||
| public sub: Subscription<RepoEvent> | ||
|
|
||
| constructor(public db: Database, public service: string) { | ||
| this.sub = new Subscription({ | ||
| service: service, | ||
| method: ids.ComAtprotoSyncSubscribeRepos, | ||
| getParams: () => this.getCursor(), | ||
| validate: (value: unknown) => { | ||
| try { | ||
| return lexicons.assertValidXrpcMessage<RepoEvent>( | ||
| ids.ComAtprotoSyncSubscribeRepos, | ||
| value, | ||
| ) | ||
| } catch (err) { | ||
| console.error('repo subscription skipped invalid message', err) | ||
| } | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| abstract handleEvent(evt: RepoEvent): Promise<void> | ||
|
|
||
| async run(subscriptionReconnectDelay: number) { | ||
| try { | ||
| for await (const evt of this.sub) { | ||
| try { | ||
| this.handleEvent(evt) // no longer awaiting this | ||
| } catch (err) { | ||
| console.error('repo subscription could not handle message', err) | ||
| } | ||
| // update stored cursor every 20 events or so | ||
| if (isCommit(evt) && evt.seq % 20 === 0) { | ||
| await this.updateCursor(evt.seq) | ||
| } | ||
| } | ||
| } catch (err) { | ||
| console.error('repo subscription errored', err) | ||
| setTimeout( | ||
| () => this.run(subscriptionReconnectDelay), | ||
| subscriptionReconnectDelay, | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| async updateCursor(cursor: number) { | ||
| await this.db.updateSubStateCursor(this.service, cursor) | ||
| } | ||
|
|
||
| async getCursor(): Promise<{ cursor?: number }> { | ||
| const res = await this.db.getSubStateCursor(this.service) | ||
| return res ? { cursor: res.cursor } : {} | ||
| } | ||
| } | ||
|
|
||
| export const getOpsByType = async (evt: Commit): Promise<OperationsByType> => { | ||
| const car = await readCar(evt.blocks) | ||
| const opsByType: OperationsByType = { | ||
| posts: { creates: [], deletes: [] }, | ||
| reposts: { creates: [], deletes: [] }, | ||
| likes: { creates: [], deletes: [] }, | ||
| follows: { creates: [], deletes: [] }, | ||
| } | ||
|
|
||
| for (const op of evt.ops) { | ||
| const uri = `at://${evt.repo}/${op.path}` | ||
| const [collection] = op.path.split('/') | ||
|
|
||
| if ( | ||
| [ | ||
| 'app.bsky.feed.repost', | ||
| 'app.bsky.graph.follow', | ||
| 'app.bsky.feed.like', | ||
| ].includes(collection) | ||
| ) | ||
| continue | ||
|
|
||
| if (op.action === 'update') continue // updates not supported yet | ||
|
|
||
| if (op.action === 'create') { | ||
| if (!op.cid) continue | ||
| const recordBytes = car.blocks.get(op.cid) | ||
| if (!recordBytes) continue | ||
| const record = cborToLexRecord(recordBytes) | ||
| const create = { uri, cid: op.cid.toString(), author: evt.repo } | ||
| if (collection === ids.AppBskyFeedPost && isPost(record)) { | ||
| opsByType.posts.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyFeedRepost && isRepost(record)) { | ||
| opsByType.reposts.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyFeedLike && isLike(record)) { | ||
| opsByType.likes.creates.push({ record, ...create }) | ||
| } else if (collection === ids.AppBskyGraphFollow && isFollow(record)) { | ||
| opsByType.follows.creates.push({ record, ...create }) | ||
| } | ||
| } | ||
|
|
||
| if (op.action === 'delete') { | ||
| if (collection === ids.AppBskyFeedPost) { | ||
| opsByType.posts.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyFeedRepost) { | ||
| opsByType.reposts.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyFeedLike) { | ||
| opsByType.likes.deletes.push({ uri }) | ||
| } else if (collection === ids.AppBskyGraphFollow) { | ||
| opsByType.follows.deletes.push({ uri }) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return opsByType | ||
| } | ||
|
|
||
| type OperationsByType = { | ||
| posts: Operations<PostRecord> | ||
| reposts: Operations<RepostRecord> | ||
| likes: Operations<LikeRecord> | ||
| follows: Operations<FollowRecord> | ||
| } | ||
|
|
||
| type Operations<T = Record<string, unknown>> = { | ||
| creates: CreateOp<T>[] | ||
| deletes: DeleteOp[] | ||
| } | ||
|
|
||
| type CreateOp<T> = { | ||
| uri: string | ||
| cid: string | ||
| author: string | ||
| record: T | ||
| } | ||
|
|
||
| type DeleteOp = { | ||
| uri: string | ||
| } | ||
|
|
||
| export const isPost = (obj: unknown): obj is PostRecord => { | ||
| return isType(obj, ids.AppBskyFeedPost) | ||
| } | ||
|
|
||
| export const isRepost = (obj: unknown): obj is RepostRecord => { | ||
| return isType(obj, ids.AppBskyFeedRepost) | ||
| } | ||
|
|
||
| export const isLike = (obj: unknown): obj is LikeRecord => { | ||
| return isType(obj, ids.AppBskyFeedLike) | ||
| } | ||
|
|
||
| export const isFollow = (obj: unknown): obj is FollowRecord => { | ||
| return isType(obj, ids.AppBskyGraphFollow) | ||
| } | ||
|
|
||
| const isType = (obj: unknown, nsid: string) => { | ||
| try { | ||
| lexicons.assertValidRecord(nsid, fixBlobRefs(obj)) | ||
| return true | ||
| } catch (err) { | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| // @TODO right now record validation fails on BlobRefs | ||
| // simply because multiple packages have their own copy | ||
| // of the BlobRef class, causing instanceof checks to fail. | ||
| // This is a temporary solution. | ||
| const fixBlobRefs = (obj: unknown): unknown => { | ||
| if (Array.isArray(obj)) { | ||
| return obj.map(fixBlobRefs) | ||
| } | ||
| if (obj && typeof obj === 'object') { | ||
| if (obj.constructor.name === 'BlobRef') { | ||
| const blob = obj as BlobRef | ||
| return new BlobRef(blob.ref, blob.mimeType, blob.size, blob.original) | ||
| } | ||
| return Object.entries(obj).reduce((acc, [key, val]) => { | ||
| return Object.assign(acc, { [key]: fixBlobRefs(val) }) | ||
| }, {} as Record<string, unknown>) | ||
| } | ||
| return obj | ||
| } |