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import {makeAutoObservable} from 'mobx'
import {AtUri, AppBskyGraphListitem} from '@atproto/api'
import {runInAction} from 'mobx'
import {RootStoreModel} from '../root-store'
const PAGE_SIZE = 100
interface Membership {
uri: string
value: AppBskyGraphListitem.Record
}
interface ListitemRecord {
uri: string
value: AppBskyGraphListitem.Record
}
interface ListitemListResponse {
cursor?: string
records: ListitemRecord[]
}
export class ListMembershipModel {
// data
memberships: Membership[] = []
constructor(public rootStore: RootStoreModel, public subject: string) {
makeAutoObservable(
this,
{
rootStore: false,
},
{autoBind: true},
)
}
// public api
// =
async fetch() {
// NOTE
// this approach to determining list membership is too inefficient to work at any scale
// it needs to be replaced with server side list membership queries
// -prf
let cursor
let records: ListitemRecord[] = []
for (let i = 0; i < 100; i++) {
const res: ListitemListResponse =
await this.rootStore.agent.app.bsky.graph.listitem.list({
repo: this.rootStore.me.did,
cursor,
limit: PAGE_SIZE,
})
records = records.concat(
res.records.filter(record => record.value.subject === this.subject),
)
cursor = res.cursor
if (!cursor) {
break
}
}
runInAction(() => {
this.memberships = records
})
}
getMembership(listUri: string) {
return this.memberships.find(m => m.value.list === listUri)
}
isMember(listUri: string) {
return !!this.getMembership(listUri)
}
async add(listUri: string) {
if (this.isMember(listUri)) {
return
}
const res = await this.rootStore.agent.app.bsky.graph.listitem.create(
{
repo: this.rootStore.me.did,
},
{
subject: this.subject,
list: listUri,
createdAt: new Date().toISOString(),
},
)
const {rkey} = new AtUri(res.uri)
const record = await this.rootStore.agent.app.bsky.graph.listitem.get({
repo: this.rootStore.me.did,
rkey,
})
runInAction(() => {
this.memberships = this.memberships.concat([record])
})
}
async remove(listUri: string) {
const membership = this.getMembership(listUri)
if (!membership) {
return
}
const {rkey} = new AtUri(membership.uri)
await this.rootStore.agent.app.bsky.graph.listitem.delete({
repo: this.rootStore.me.did,
rkey,
})
runInAction(() => {
this.memberships = this.memberships.filter(m => m.value.list !== listUri)
})
}
async updateTo(
uris: string[],
): Promise<{added: string[]; removed: string[]}> {
const added = []
const removed = []
for (const uri of uris) {
await this.add(uri)
added.push(uri)
}
for (const membership of this.memberships) {
if (!uris.includes(membership.value.list)) {
await this.remove(membership.value.list)
removed.push(membership.value.list)
}
}
return {added, removed}
}
}
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