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133 lines
4.9 KiB
133 lines
4.9 KiB
const { Injectable } = require('flitter-di')
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/**
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* Generates the matchups for the current week by scheduling teams
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* to play, first any team they haven't already played, or a random
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* team.
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*
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* @example
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* P = require('./app/GenerateMatchupsForWeek.patch')
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* p = _di.make(P)
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* await p.run()
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*
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* @extends Injectable
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*/
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class GenerateMatchupsForWeekPatch extends Injectable {
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static get services() {
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return [...super.services, 'models', 'sports_data', 'output']
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}
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/**
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* Run the patch.
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*/
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async run() {
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const Team = this.models.get('Team')
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const Matchup = this.models.get('Matchup')
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const current_week = await this.sports_data.current_play_week()
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// clear any existing data
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const old_matchups = await Matchup.find({ week_num: current_week })
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if ( old_matchups.length ) {
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this.output.info('Purging old data.')
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await Promise.all(old_matchups.map(x => x.delete()))
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}
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const all_teams = await Team.find()
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const matchups = []
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const scheduled_team_ids = []
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const home_team = current_week % 2 === 0
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this.output.info(`Generating matchups for week ${current_week} for ${all_teams.length} teams...`)
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for ( const team of all_teams ) {
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this.output.debug(`Scheduled team IDs: ${scheduled_team_ids.join(', ')}`)
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this.output.info(`Scheduling team ${team.id}`)
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// If we've already scheduled this team, don't do it twice
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if ( scheduled_team_ids.includes(team.id) ) continue
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// Otherwise, try to schedule the team to play a team they haven't already matched
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const played_team_ids = await this.get_teams_played_by_team(team)
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let matchup;
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for ( const other_team of all_teams ) {
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// Only schedule a matchup if:
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// - we haven't played this team
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// - we haven't scheduled this team for this week already
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// - this isn't the same team
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if (
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team.id !== other_team.id
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&& !played_team_ids.includes(other_team.id)
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&& !scheduled_team_ids.includes(other_team.id)
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) {
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// We haven't played this team yet, so schedule a matchup
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matchup = new Matchup({
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week_num: current_week
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})
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// Switch who's home/visitor based on the week number
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if ( home_team ) {
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matchup.home_team_id = team.id
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matchup.visitor_team_id = other_team.id
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} else {
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matchup.home_team_id = other_team.id
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matchup.visitor_team_id = team.id
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}
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}
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}
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if ( !matchup ) {
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// We've played all teams, so just try to pick a random one.
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const other_team = all_teams.filter(x => {
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return !scheduled_team_ids.includes(x.id) && x.id !== team.id
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})[Math.floor(Math.random() * all_teams.length)]
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// We might not have an available team this week
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if ( other_team ) {
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matchup = new Matchup({
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week_num: current_week
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})
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if (home_team) {
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matchup.home_team_id = team.id
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matchup.visitor_team_id = other_team.id
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} else {
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matchup.home_team_id = other_team.id
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matchup.visitor_team_id = team.id
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}
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}
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}
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// Uh, oh. We couldn't generate a matchup for this team
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if ( !matchup ) {
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this.output.warn(` - Team ${team.id} will be BYE`)
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continue
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}
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// We generated a matchup for this team
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this.output.success(` - Team ${matchup.visitor_team_id} will play at ${matchup.home_team_id}`)
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scheduled_team_ids.push(matchup.home_team_id)
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scheduled_team_ids.push(matchup.visitor_team_id)
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matchups.push(matchup)
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}
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await Promise.all(matchups.map(x => x.save()))
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this.output.success('Complete.')
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}
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/**
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* Get a list of all teams played by the given team.
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* @param {Team} team
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* @returns {Promise<Array<string>>}
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*/
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async get_teams_played_by_team(team) {
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const Matchup = this.models.get('Matchup')
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const home_games = await Matchup.find({ home_team_id: team.id })
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const visitor_games = await Matchup.find({ visitor_team_id: team.id })
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return [...home_games.map(x => x.visitor_team_id), ...visitor_games.map(x => x.home_team_id)]
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}
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}
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module.exports = GenerateMatchupsForWeekPatch
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