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import {makeAutoObservable, runInAction} from 'mobx'
import {RootStoreModel} from '../root-store'
import {bundleAsync} from 'lib/async/bundle'
import {cleanError} from 'lib/strings/errors'
import {CustomFeedModel} from '../feeds/custom-feed'
export class SavedFeedsModel {
// state
isLoading = false
isRefreshing = false
hasLoaded = false
error = ''
// data
_feedModelCache: Record<string, CustomFeedModel> = {}
constructor(public rootStore: RootStoreModel) {
makeAutoObservable(
this,
{
rootStore: false,
},
{autoBind: true},
)
}
get hasContent() {
return this.all.length > 0
}
get hasError() {
return this.error !== ''
}
get isEmpty() {
return this.hasLoaded && !this.hasContent
}
get pinned() {
return this.rootStore.preferences.pinnedFeeds
.map(uri => this._feedModelCache[uri] as CustomFeedModel)
.filter(Boolean)
}
get unpinned() {
return this.rootStore.preferences.savedFeeds
.filter(uri => !this.isPinned(uri))
.map(uri => this._feedModelCache[uri] as CustomFeedModel)
.filter(Boolean)
}
get all() {
return [...this.pinned, ...this.unpinned]
}
get pinnedFeedNames() {
return this.pinned.map(f => f.displayName)
}
// public api
// =
/**
* Syncs the cached models against the current state
* - Should only be called by the preferences model after syncing state
*/
updateCache = bundleAsync(async (clearCache?: boolean) => {
let newFeedModels: Record<string, CustomFeedModel> = {}
if (!clearCache) {
newFeedModels = {...this._feedModelCache}
}
// collect the feed URIs that havent been synced yet
const neededFeedUris = []
for (const feedUri of this.rootStore.preferences.savedFeeds) {
if (!(feedUri in newFeedModels)) {
neededFeedUris.push(feedUri)
}
}
// fetch the missing models
for (let i = 0; i < neededFeedUris.length; i += 25) {
const res = await this.rootStore.agent.app.bsky.feed.getFeedGenerators({
feeds: neededFeedUris.slice(i, 25),
})
for (const feedInfo of res.data.feeds) {
newFeedModels[feedInfo.uri] = new CustomFeedModel(
this.rootStore,
feedInfo,
)
}
}
// merge into the cache
runInAction(() => {
this._feedModelCache = newFeedModels
})
})
/**
* Refresh the preferences then reload all feed infos
*/
refresh = bundleAsync(async () => {
this._xLoading(true)
try {
await this.rootStore.preferences.sync({clearCache: true})
this._xIdle()
} catch (e: any) {
this._xIdle(e)
}
})
async save(feed: CustomFeedModel) {
try {
await feed.save()
await this.updateCache()
} catch (e: any) {
this.rootStore.log.error('Failed to save feed', e)
}
}
async unsave(feed: CustomFeedModel) {
const uri = feed.uri
try {
if (this.isPinned(feed)) {
await this.rootStore.preferences.removePinnedFeed(uri)
}
await feed.unsave()
} catch (e: any) {
this.rootStore.log.error('Failed to unsave feed', e)
}
}
async togglePinnedFeed(feed: CustomFeedModel) {
if (!this.isPinned(feed)) {
return this.rootStore.preferences.addPinnedFeed(feed.uri)
} else {
return this.rootStore.preferences.removePinnedFeed(feed.uri)
}
}
async reorderPinnedFeeds(feeds: CustomFeedModel[]) {
return this.rootStore.preferences.setSavedFeeds(
this.rootStore.preferences.savedFeeds,
feeds.filter(feed => this.isPinned(feed)).map(feed => feed.uri),
)
}
isPinned(feedOrUri: CustomFeedModel | string) {
let uri: string
if (typeof feedOrUri === 'string') {
uri = feedOrUri
} else {
uri = feedOrUri.uri
}
return this.rootStore.preferences.pinnedFeeds.includes(uri)
}
async movePinnedFeed(item: CustomFeedModel, direction: 'up' | 'down') {
const pinned = this.rootStore.preferences.pinnedFeeds.slice()
const index = pinned.indexOf(item.uri)
if (index === -1) {
return
}
if (direction === 'up' && index !== 0) {
const temp = pinned[index]
pinned[index] = pinned[index - 1]
pinned[index - 1] = temp
} else if (direction === 'down' && index < pinned.length - 1) {
const temp = pinned[index]
pinned[index] = pinned[index + 1]
pinned[index + 1] = temp
}
await this.rootStore.preferences.setSavedFeeds(
this.rootStore.preferences.savedFeeds,
pinned,
)
}
// state transitions
// =
_xLoading(isRefreshing = false) {
this.isLoading = true
this.isRefreshing = isRefreshing
this.error = ''
}
_xIdle(err?: any) {
this.isLoading = false
this.isRefreshing = false
this.hasLoaded = true
this.error = cleanError(err)
if (err) {
this.rootStore.log.error('Failed to fetch user feeds', err)
}
}
}
|
