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path: root/src/lib/generate-starterpack.ts
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import {
  $Typed,
  AppBskyActorDefs,
  AppBskyGraphGetStarterPack,
  BskyAgent,
  ComAtprotoRepoApplyWrites,
  Facet,
} from '@atproto/api'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useMutation} from '@tanstack/react-query'

import {until} from '#/lib/async/until'
import {sanitizeDisplayName} from '#/lib/strings/display-names'
import {sanitizeHandle} from '#/lib/strings/handles'
import {enforceLen} from '#/lib/strings/helpers'
import {useAgent} from '#/state/session'
import * as bsky from '#/types/bsky'

export const createStarterPackList = async ({
  name,
  description,
  descriptionFacets,
  profiles,
  agent,
}: {
  name: string
  description?: string
  descriptionFacets?: Facet[]
  profiles: bsky.profile.AnyProfileView[]
  agent: BskyAgent
}): Promise<{uri: string; cid: string}> => {
  if (profiles.length === 0) throw new Error('No profiles given')

  const list = await agent.app.bsky.graph.list.create(
    {repo: agent.session!.did},
    {
      name,
      description,
      descriptionFacets,
      avatar: undefined,
      createdAt: new Date().toISOString(),
      purpose: 'app.bsky.graph.defs#referencelist',
    },
  )
  if (!list) throw new Error('List creation failed')
  await agent.com.atproto.repo.applyWrites({
    repo: agent.session!.did,
    writes: [
      createListItem({did: agent.session!.did, listUri: list.uri}),
    ].concat(
      profiles
        // Ensure we don't have ourselves in this list twice
        .filter(p => p.did !== agent.session!.did)
        .map(p => createListItem({did: p.did, listUri: list.uri})),
    ),
  })

  return list
}

export function useGenerateStarterPackMutation({
  onSuccess,
  onError,
}: {
  onSuccess: ({uri, cid}: {uri: string; cid: string}) => void
  onError: (e: Error) => void
}) {
  const {_} = useLingui()
  const agent = useAgent()

  return useMutation<{uri: string; cid: string}, Error, void>({
    mutationFn: async () => {
      let profile: AppBskyActorDefs.ProfileViewDetailed | undefined
      let profiles: AppBskyActorDefs.ProfileView[] | undefined

      await Promise.all([
        (async () => {
          profile = (
            await agent.app.bsky.actor.getProfile({
              actor: agent.session!.did,
            })
          ).data
        })(),
        (async () => {
          profiles = (
            await agent.app.bsky.actor.searchActors({
              q: encodeURIComponent('*'),
              limit: 49,
            })
          ).data.actors.filter(p => p.viewer?.following)
        })(),
      ])

      if (!profile || !profiles) {
        throw new Error('ERROR_DATA')
      }

      // We include ourselves when we make the list
      if (profiles.length < 7) {
        throw new Error('NOT_ENOUGH_FOLLOWERS')
      }

      const displayName = enforceLen(
        profile.displayName
          ? sanitizeDisplayName(profile.displayName)
          : `@${sanitizeHandle(profile.handle)}`,
        25,
        true,
      )
      const starterPackName = _(msg`${displayName}'s Starter Pack`)

      const list = await createStarterPackList({
        name: starterPackName,
        profiles,
        agent,
      })

      return await agent.app.bsky.graph.starterpack.create(
        {
          repo: agent.session!.did,
        },
        {
          name: starterPackName,
          list: list.uri,
          createdAt: new Date().toISOString(),
        },
      )
    },
    onSuccess: async data => {
      await whenAppViewReady(agent, data.uri, v => {
        return typeof v?.data.starterPack.uri === 'string'
      })
      onSuccess(data)
    },
    onError: error => {
      onError(error)
    },
  })
}

function createListItem({
  did,
  listUri,
}: {
  did: string
  listUri: string
}): $Typed<ComAtprotoRepoApplyWrites.Create> {
  return {
    $type: 'com.atproto.repo.applyWrites#create',
    collection: 'app.bsky.graph.listitem',
    value: {
      $type: 'app.bsky.graph.listitem',
      subject: did,
      list: listUri,
      createdAt: new Date().toISOString(),
    },
  }
}

async function whenAppViewReady(
  agent: BskyAgent,
  uri: string,
  fn: (res?: AppBskyGraphGetStarterPack.Response) => boolean,
) {
  await until(
    5, // 5 tries
    1e3, // 1s delay between tries
    fn,
    () => agent.app.bsky.graph.getStarterPack({starterPack: uri}),
  )
}