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<title>JSDoc: Source: app/GenerateMatchupsForWeek.patch.js</title>
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<h1 class="page-title">Source: app/GenerateMatchupsForWeek.patch.js</h1>
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<pre class="prettyprint source linenums"><code>const { Injectable } = require('flitter-di')
/**
* Generates the matchups for the current week by scheduling teams
* to play, first any team they haven't already played, or a random
* team.
*
* @example
* P = require('./app/GenerateMatchupsForWeek.patch')
* p = _di.make(P)
* await p.run()
*
* @extends Injectable
*/
class GenerateMatchupsForWeekPatch extends Injectable {
static get services() {
return [...super.services, 'models', 'sports_data', 'output']
}
/**
* Run the patch.
*/
async run() {
const Team = this.models.get('Team')
const Matchup = this.models.get('Matchup')
const current_week = await this.sports_data.current_play_week()
// clear any existing data
const old_matchups = await Matchup.find({ week_num: current_week })
if ( old_matchups.length ) {
this.output.info('Purging old data.')
await Promise.all(old_matchups.map(x => x.delete()))
}
const all_teams = await Team.find()
const matchups = []
const scheduled_team_ids = []
const home_team = current_week % 2 === 0
this.output.info(`Generating matchups for week ${current_week} for ${all_teams.length} teams...`)
for ( const team of all_teams ) {
this.output.debug(`Scheduled team IDs: ${scheduled_team_ids.join(', ')}`)
this.output.info(`Scheduling team ${team.id}`)
// If we've already scheduled this team, don't do it twice
if ( scheduled_team_ids.includes(team.id) ) continue
// Otherwise, try to schedule the team to play a team they haven't already matched
const played_team_ids = await this.get_teams_played_by_team(team)
let matchup;
for ( const other_team of all_teams ) {
// Only schedule a matchup if:
// - we haven't played this team
// - we haven't scheduled this team for this week already
// - this isn't the same team
if (
team.id !== other_team.id
&amp;&amp; !played_team_ids.includes(other_team.id)
&amp;&amp; !scheduled_team_ids.includes(other_team.id)
) {
// We haven't played this team yet, so schedule a matchup
matchup = new Matchup({
week_num: current_week
})
// Switch who's home/visitor based on the week number
if ( home_team ) {
matchup.home_team_id = team.id
matchup.visitor_team_id = other_team.id
} else {
matchup.home_team_id = other_team.id
matchup.visitor_team_id = team.id
}
}
}
if ( !matchup ) {
// We've played all teams, so just try to pick a random one.
const other_team = all_teams.filter(x => {
return !scheduled_team_ids.includes(x.id) &amp;&amp; x.id !== team.id
})[Math.floor(Math.random() * all_teams.length)]
// We might not have an available team this week
if ( other_team ) {
matchup = new Matchup({
week_num: current_week
})
if (home_team) {
matchup.home_team_id = team.id
matchup.visitor_team_id = other_team.id
} else {
matchup.home_team_id = other_team.id
matchup.visitor_team_id = team.id
}
}
}
// Uh, oh. We couldn't generate a matchup for this team
if ( !matchup ) {
this.output.warn(` - Team ${team.id} will be BYE`)
continue
}
// We generated a matchup for this team
this.output.success(` - Team ${matchup.visitor_team_id} will play at ${matchup.home_team_id}`)
scheduled_team_ids.push(matchup.home_team_id)
scheduled_team_ids.push(matchup.visitor_team_id)
matchups.push(matchup)
}
await Promise.all(matchups.map(x => x.save()))
this.output.success('Complete.')
}
/**
* Get a list of all teams played by the given team.
* @param {Team} team
* @returns {Promise&lt;Array&lt;string>>}
*/
async get_teams_played_by_team(team) {
const Matchup = this.models.get('Matchup')
const home_games = await Matchup.find({ home_team_id: team.id })
const visitor_games = await Matchup.find({ visitor_team_id: team.id })
return [...home_games.map(x => x.visitor_team_id), ...visitor_games.map(x => x.home_team_id)]
}
}
module.exports = GenerateMatchupsForWeekPatch
</code></pre>
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