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Bluesky app fork with some witchin' additions 💫 forked from jollywhoppers.com/witchsky.app
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8.8 kB · 264 lines
TypeScript
at build
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import {extendSelfThreadChain} from '#/state/queries/usePostThread/selfThreadChain'import {type app} from '#/lexicons'
type RawThreadItem = app.bsky.unspecced.getPostThreadV2.ThreadItem
const OP_DID = 'did:plc:op'
function post({ rkey, depth, did = OP_DID, opThread = true, moreReplies = 0, replyCount = 0,}: { rkey: string depth: number did?: string opThread?: boolean moreReplies?: number replyCount?: number}): RawThreadItem { const uri = `at://${did}/app.bsky.feed.post/${rkey}` return { uri, depth, value: { $type: 'app.bsky.unspecced.defs#threadItemPost', post: { uri, author: {did, handle: 'user.test'}, record: {}, replyCount, }, moreParents: false, moreReplies, opThread, hiddenByThreadgate: false, mutedByViewer: false, }, } as unknown as RawThreadItem}
const rkeys = (thread: RawThreadItem[]) => thread.map(item => item.uri.split('/').pop())
const depths = (thread: RawThreadItem[]) => thread.map(item => item.depth)
describe('extendSelfThreadChain', () => { it('does not fetch when the chain tip has a hydrated child', async () => { const fetchBelow = jest.fn() // the tip has replies, but one is hydrated below it, so the tip did not // sit at the response's depth cap and the chain ended for real const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1, moreReplies: 0}), post({rkey: 'x', depth: 3, did: 'did:plc:other'}), ] const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).not.toHaveBeenCalled() expect(result).toBe(thread) })
it('extends a chain truncated at the depth cap', async () => { const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1}), post({rkey: 'd', depth: 3, replyCount: 2, moreReplies: 2}), ] const fetchBelow = jest .fn() .mockResolvedValue([ post({rkey: 'd', depth: 0, replyCount: 2, moreReplies: 1}), post({rkey: 'e', depth: 1, replyCount: 1}), post({rkey: 'f', depth: 2}), ]) const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).toHaveBeenCalledTimes(1) expect(fetchBelow).toHaveBeenCalledWith(thread[3].uri) expect(rkeys(result)).toEqual(['a', 'b', 'c', 'd', 'e', 'f']) // continuation depths are made absolute expect(depths(result)).toEqual([0, 1, 2, 3, 4, 5]) // the old tip's continuation is now hydrated, so moreReplies drops by one const tipValue = result[3].value if (!AppBskyUnspeccedDefs.isThreadItemPost(tipValue)) { throw new Error('expected tip to be a post') } expect(tipValue.moreReplies).toBe(1) })
it('keeps fetching until the chain ends naturally', async () => { const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1}), post({rkey: 'd', depth: 3, replyCount: 1, moreReplies: 1}), ] const pages: RawThreadItem[][] = [ [ post({rkey: 'd', depth: 0, replyCount: 1}), post({rkey: 'e', depth: 1, replyCount: 1}), post({rkey: 'f', depth: 2, replyCount: 1}), post({rkey: 'g', depth: 3, replyCount: 1, moreReplies: 1}), ], [post({rkey: 'g', depth: 0, replyCount: 1}), post({rkey: 'h', depth: 1})], ] const fetchBelow = jest.fn(() => Promise.resolve(pages.shift()!)) const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).toHaveBeenCalledTimes(2) expect(rkeys(result)).toEqual(['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']) expect(depths(result)).toEqual([0, 1, 2, 3, 4, 5, 6, 7]) })
it('extends a self-thread started in another author’s replies', async () => { const thread = [ post({rkey: 'a', depth: 0, opThread: false, replyCount: 1}), post({rkey: 'b', depth: 1, opThread: false, moreReplies: 1}), ] const fetchBelow = jest .fn() .mockResolvedValue([ post({rkey: 'b', depth: 0, opThread: false, replyCount: 1}), post({rkey: 'c', depth: 1, opThread: false}), ])
const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).toHaveBeenCalledWith(thread[1].uri) expect(rkeys(result)).toEqual(['a', 'b', 'c']) expect(depths(result)).toEqual([0, 1, 2]) })
it('continues past 110 posts in another batch without losing the earlier posts', async () => { const initial = Array.from({length: 111}, (_, depth) => post({ rkey: String(depth), depth, replyCount: 1, moreReplies: depth === 110 ? 1 : 0, }), ) const fetchBelow = jest.fn((uri: string) => { const start = Number(uri.split('/').pop()) return Promise.resolve( Array.from({length: 11}, (_, depth) => post({ rkey: String(start + depth), depth, replyCount: 1, moreReplies: depth === 10 ? 1 : 0, }), ), ) })
const first = await extendSelfThreadChain({ thread: initial, maxFetches: 1, fetchBelow, }) const second = await extendSelfThreadChain({ thread: first, maxFetches: 1, fetchBelow, })
expect(fetchBelow.mock.calls.map(([uri]) => uri.split('/').pop())).toEqual([ '110', '120', ]) expect(rkeys(second)).toEqual( Array.from({length: 131}, (_, i) => String(i)), ) expect(depths(second)).toEqual(Array.from({length: 131}, (_, i) => i)) expect(initial).toHaveLength(111) })
it('stops at maxFetches even if the chain continues', async () => { const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b0', depth: 1, replyCount: 1}), post({rkey: 'b1', depth: 2, replyCount: 1}), post({rkey: 'b2', depth: 3, replyCount: 1, moreReplies: 1}), ] let n = 2 const fetchBelow = jest.fn((anchorUri: string) => { const anchorRkey = anchorUri.split('/').pop() return Promise.resolve([ post({rkey: anchorRkey!, depth: 0, replyCount: 1}), post({rkey: `c${n}`, depth: 1, replyCount: 1}), post({rkey: `c${n + 1}`, depth: 2, replyCount: 1}), post({rkey: `c${n++}x`, depth: 3, replyCount: 1, moreReplies: 1}), ]) }) const result = await extendSelfThreadChain({ thread, maxFetches: 2, fetchBelow, })
expect(fetchBelow).toHaveBeenCalledTimes(2) expect(result.length).toBe(4 + 2 * 3) })
it('stops when the continuation has no OP chain', async () => { const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1}), post({rkey: 'd', depth: 3, replyCount: 1, moreReplies: 1}), ] const fetchBelow = jest .fn() .mockResolvedValue([ post({rkey: 'd', depth: 0, replyCount: 1}), post({rkey: 'x', depth: 1, did: 'did:plc:other'}), ]) const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).toHaveBeenCalledTimes(1) expect(rkeys(result)).toEqual(['a', 'b', 'c', 'd']) })
it('skips the fetch when the tip has no replies', async () => { const fetchBelow = jest.fn() const thread = [ post({rkey: 'a', depth: 0, replyCount: 1}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1}), post({rkey: 'd', depth: 3, replyCount: 0, moreReplies: 0}), ] const result = await extendSelfThreadChain({thread, fetchBelow})
expect(fetchBelow).not.toHaveBeenCalled() expect(rkeys(result)).toEqual(['a', 'b', 'c', 'd']) })
it('splices the continuation before trailing sibling branches', async () => { const thread = [ post({rkey: 'a', depth: 0, replyCount: 2}), post({rkey: 'b', depth: 1, replyCount: 1}), post({rkey: 'c', depth: 2, replyCount: 1}), post({rkey: 'd', depth: 3, replyCount: 1, moreReplies: 1}), post({rkey: 'z', depth: 1, did: 'did:plc:other', opThread: false}), ] const fetchBelow = jest .fn() .mockResolvedValue([ post({rkey: 'd', depth: 0, replyCount: 1}), post({rkey: 'e', depth: 1}), ]) const result = await extendSelfThreadChain({thread, fetchBelow})
expect(rkeys(result)).toEqual(['a', 'b', 'c', 'd', 'e', 'z']) expect(depths(result)).toEqual([0, 1, 2, 3, 4, 1]) })})