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import {makeAutoObservable, runInAction} from 'mobx'
import {AppBskyActorDefs} from '@atproto/api'
import AwaitLock from 'await-lock'
import {RootStoreModel} from '../root-store'
import {isInvalidHandle} from 'lib/strings/handles'
type ProfileViewBasic = AppBskyActorDefs.ProfileViewBasic
export class UserAutocompleteModel {
// state
isLoading = false
isActive = false
prefix = ''
lock = new AwaitLock()
// data
knownHandles: Set<string> = new Set()
_suggestions: ProfileViewBasic[] = []
constructor(public rootStore: RootStoreModel) {
makeAutoObservable(
this,
{
rootStore: false,
knownHandles: false,
},
{autoBind: true},
)
}
get follows(): ProfileViewBasic[] {
return Object.values(this.rootStore.me.follows.byDid).map(item => ({
did: item.did,
handle: item.handle,
displayName: item.displayName,
avatar: item.avatar,
}))
}
get suggestions(): ProfileViewBasic[] {
if (!this.isActive) {
return []
}
return this._suggestions
}
// public api
// =
async setup() {
await this.rootStore.me.follows.syncIfNeeded()
runInAction(() => {
for (const did in this.rootStore.me.follows.byDid) {
const info = this.rootStore.me.follows.byDid[did]
if (!isInvalidHandle(info.handle)) {
this.knownHandles.add(info.handle)
}
}
})
}
setActive(v: boolean) {
this.isActive = v
}
async setPrefix(prefix: string) {
const origPrefix = prefix.trim().toLocaleLowerCase()
this.prefix = origPrefix
await this.lock.acquireAsync()
try {
if (this.prefix) {
if (this.prefix !== origPrefix) {
return // another prefix was set before we got our chance
}
// reset to follow results
this._computeSuggestions([])
// ask backend
const res = await this.rootStore.agent.searchActorsTypeahead({
term: this.prefix,
limit: 8,
})
this._computeSuggestions(res.data.actors)
// update known handles
runInAction(() => {
for (const u of res.data.actors) {
this.knownHandles.add(u.handle)
}
})
} else {
runInAction(() => {
this._computeSuggestions([])
})
}
} finally {
this.lock.release()
}
}
// internal
// =
_computeSuggestions(searchRes: AppBskyActorDefs.ProfileViewBasic[] = []) {
if (this.prefix) {
const items: ProfileViewBasic[] = []
for (const item of this.follows) {
if (prefixMatch(this.prefix, item)) {
items.push(item)
}
if (items.length >= 8) {
break
}
}
for (const item of searchRes) {
if (!items.find(item2 => item2.handle === item.handle)) {
items.push({
did: item.did,
handle: item.handle,
displayName: item.displayName,
avatar: item.avatar,
})
}
}
this._suggestions = items
} else {
this._suggestions = this.follows
}
}
}
function prefixMatch(prefix: string, info: ProfileViewBasic): boolean {
if (info.handle.includes(prefix)) {
return true
}
if (info.displayName?.toLocaleLowerCase().includes(prefix)) {
return true
}
return false
}
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