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import * as express from 'express'
import { buildNSFWFilter } from '../../helpers/express-utils'
import { VideoModel } from '../../models/video/video'
import { asyncMiddleware, optionalAuthenticate, videosOverviewValidator } from '../../middlewares'
import { TagModel } from '../../models/video/tag'
import { CategoryOverview, ChannelOverview, TagOverview, VideosOverview } from '../../../shared/models/overviews'
import { MEMOIZE_TTL, OVERVIEWS } from '../../initializers/constants'
import * as memoizee from 'memoizee'
import { logger } from '@server/helpers/logger'
const overviewsRouter = express.Router()
overviewsRouter.get('/videos',
videosOverviewValidator,
optionalAuthenticate,
asyncMiddleware(getVideosOverview)
)
// ---------------------------------------------------------------------------
export { overviewsRouter }
// ---------------------------------------------------------------------------
const buildSamples = memoizee(async function () {
const [ categories, channels, tags ] = await Promise.all([
VideoModel.getRandomFieldSamples('category', OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD, OVERVIEWS.VIDEOS.SAMPLES_COUNT),
VideoModel.getRandomFieldSamples('channelId', OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD, OVERVIEWS.VIDEOS.SAMPLES_COUNT),
TagModel.getRandomSamples(OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD, OVERVIEWS.VIDEOS.SAMPLES_COUNT)
])
const result = { categories, channels, tags }
logger.debug('Building samples for overview endpoint.', { result })
return result
}, { maxAge: MEMOIZE_TTL.OVERVIEWS_SAMPLE })
// This endpoint could be quite long, but we cache it
async function getVideosOverview (req: express.Request, res: express.Response) {
const attributes = await buildSamples()
const page = req.query.page || 1
const index = page - 1
const categories: CategoryOverview[] = []
const channels: ChannelOverview[] = []
const tags: TagOverview[] = []
await Promise.all([
getVideosByCategory(attributes.categories, index, res, categories),
getVideosByChannel(attributes.channels, index, res, channels),
getVideosByTag(attributes.tags, index, res, tags)
])
const result: VideosOverview = {
categories,
channels,
tags
}
return res.json(result)
}
async function getVideosByTag (tagsSample: string[], index: number, res: express.Response, acc: TagOverview[]) {
if (tagsSample.length <= index) return
const tag = tagsSample[index]
const videos = await getVideos(res, { tagsOneOf: [ tag ] })
if (videos.length === 0) return
acc.push({
tag,
videos
})
}
async function getVideosByCategory (categoriesSample: number[], index: number, res: express.Response, acc: CategoryOverview[]) {
if (categoriesSample.length <= index) return
const category = categoriesSample[index]
const videos = await getVideos(res, { categoryOneOf: [ category ] })
if (videos.length === 0) return
acc.push({
category: videos[0].category,
videos
})
}
async function getVideosByChannel (channelsSample: number[], index: number, res: express.Response, acc: ChannelOverview[]) {
if (channelsSample.length <= index) return
const channelId = channelsSample[index]
const videos = await getVideos(res, { videoChannelId: channelId })
if (videos.length === 0) return
acc.push({
channel: videos[0].channel,
videos
})
}
async function getVideos (
res: express.Response,
where: { videoChannelId?: number, tagsOneOf?: string[], categoryOneOf?: number[] }
) {
const query = Object.assign({
start: 0,
count: 12,
sort: '-createdAt',
includeLocalVideos: true,
nsfw: buildNSFWFilter(res),
withFiles: false,
countVideos: false
}, where)
const { data } = await VideoModel.listForApi(query)
return data.map(d => d.toFormattedJSON())
}
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