LeagueStats/server/app/Services/MatchService.ts

import Jax from './Jax'
import Logger from '@ioc:Adonis/Core/Logger'
import { MatchlistDto } from './Jax/src/Endpoints/MatchlistEndpoint'
import { SummonerDTO } from './Jax/src/Endpoints/SummonerEndpoint'
import { SummonerModel } from 'App/Models/Summoner'
import Match, { MatchModel } from 'App/Models/Match'
import BasicMatchTransformer from 'App/Transformers/BasicMatchTransformer'

class MatchService {
  /**
   * Add 100 matches at a time to MatchList until the stopFetching condition is true
   * @param account of the summoner
   * @param stopFetching condition to stop fetching the MatchList
   */
  private async _fetchMatchListUntil (account: SummonerDTO, stopFetching: any) {
    let matchList: MatchlistDto = []
    let alreadyIn = false
    let index = 0
    do {
      let newMatchList = await Jax.Matchlist.puuid(account.puuid, account.region as string, index)
      // Error while fetching Riot API
      if (!newMatchList) {
        // matchList = matchList.map(m => {
        //   m.season = getSeasonNumber(m.timestamp)
        //   return m
        // })
        return matchList
      }
      matchList = [...matchList, ...newMatchList]
      alreadyIn = newMatchList.length === 0 || stopFetching(newMatchList)
      // If the match is made in another region : we stop fetching
      // if (matchList[matchList.length - 1].platformId.toLowerCase() !== account.region) { // TODO: check if region has changed
      //   alreadyIn = true
      // }
      index += 100
    } while (!alreadyIn)

    // Remove matches from MatchList made in another region and tutorial games
    // const tutorialModes = [2000, 2010, 2020]
    // matchList = matchList
    //   .filter(m => {
    //     const sameRegion = m.platformId.toLowerCase() === account.region
    //     const notATutorialGame = !tutorialModes.includes(m.queue)

    //     return sameRegion && notATutorialGame
    //   })
    //   .map(m => {
    //     m.seasonMatch = getSeasonNumber(m.timestamp)
    //     return m
    //   })

    return matchList
  }
  /**
   * Update the full MatchList of the summoner (min. 4 months)
   * @param account of the summoner
   * @param summonerDB summoner in the database
   */
  public async updateMatchList (account: SummonerDTO, summonerDB: SummonerModel) {
    console.time('matchList')

    // Summoner has already been searched : we already have a MatchList and we need to update it
    if (summonerDB.matchList) {
      // Get MatchList
      const matchList = await this._fetchMatchListUntil(account, (newMatchList: MatchlistDto) => {
        return summonerDB.matchList!.some(m => m === newMatchList[newMatchList.length - 1])
      })
      // Update Summoner's MatchList
      for (const match of matchList.reverse()) {
        if (!summonerDB.matchList.some(m => m === match)) {
          summonerDB.matchList.unshift(match)
        }
      }
    } else { // First search of the Summoner 
      // const today = Date.now()
      // Get MatchList
      const matchList = await this._fetchMatchListUntil(account, (newMatchList: MatchlistDto) => {
        // return (newMatchList.length !== 100 || today - newMatchList[newMatchList.length - 1].timestamp > 10368000000)
        return newMatchList.length === 0 // TODO: useless
      })
      // Create Summoner's MatchList in Database
      summonerDB.matchList = matchList
    }
    console.timeEnd('matchList')
  }

  /**
   * Fetch list of matches for a specific Summoner
   * @param puuid 
   * @param accountId
   * @param region 
   * @param gameIds 
   * @param summonerDB 
   */
  public async getMatches (puuid: string, accountId: string, region: string, matchIds: MatchlistDto, summonerDB: SummonerModel) {
    console.time('getMatches')

    let matchesDetails: MatchModel[] = []
    const matchesToGetFromRiot: MatchlistDto = []
    for (let i = 0; i < matchIds.length; ++i) {
      const matchSaved = await Match.findOne({
        summoner_puuid: puuid,
        matchId: matchIds[i],
      })
      if (matchSaved) {
        matchesDetails.push(matchSaved)
      } else {
        matchesToGetFromRiot.push(matchIds[i])
      }
    }

    const requests = matchesToGetFromRiot.map(gameId => Jax.Match.get(gameId, region))
    let matchesFromApi = await Promise.all(requests)

    /* If we have to store some matches in the db */
    if (matchesFromApi.length !== 0) {
      // Try to see why matches are sometimes undefined
      matchesFromApi.filter(m => {
        if (m === undefined) {
          Logger.info(`Match undefined, summoner: ${summonerDB.puuid}`, m)
        }
      })

      // Transform raw matches data
      const transformedMatches = await BasicMatchTransformer.transform(matchesFromApi, { puuid, accountId })

      /* Save all matches from Riot Api in db */
      for (const match of transformedMatches) {
        await Match.create(match)
        match.newMatch = true
      }
      matchesDetails = [...matchesDetails, ...transformedMatches]
    }

    /* Sort matches */
    matchesDetails.sort((a, b) => (a.date < b.date) ? 1 : -1)
    console.timeEnd('getMatches')

    return matchesDetails
  }
}

export default new MatchService()