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Tournify

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This project aims to support the creation of any tournament.

Current features

  • Group tournament creation
  • Group tournament stats

Planned features

  • Elimination tournaments
  • Double elimination
  • Round robin

Example

To create a group tournament with 2 groups where all teams in each group meet one time simply do the following.

package main

import (
	"fmt"
	"github.com/tournify/tournify"
	"math"
	"math/rand"
)

func main()  {
	teams := []tournify.Team{
		{ID:0},
		{ID:1},
		{ID:2},
		{ID:3},
		{ID:4},
		{ID:5},
		{ID:6},
		{ID:7},
		{ID:8},
		{ID:9},
		{ID:10},
		{ID:11},
		{ID:12},
		{ID:13},
		{ID:14},
		{ID:15},
		{ID:16},
	}

	teamInterfaces := make([]tournify.TeamInterface, len(teams))

	for i := range teams {
		teamInterfaces[i] = &teams[i]
	}

	// The CreateGroupTournamentFromTeams method takes a slice of teams along with the group count and meet count
	tournament := tournify.CreateGroupTournamentFromTeams(teamInterfaces, 2, 1)

	for _, game := range tournament.GetGames() {
		game.SetScore(randomEvenFloat(0.0, 10.0), randomEvenFloat(0.0, 10.0))
		err := tournament.SetGame(game)
		if err != nil {
			panic(err)
		}
	}

	// The print method gives us a string representing the current tournament
	fmt.Println(tournament.Print())
}

func randomEvenFloat(min float64, max float64) float64 {
	return math.RoundToEven(min + rand.Float64() * (max - min))
}

This will print something similar to the following output.

TournamentType: Group

Groups
Group ID: 0
Team ID: 0
Team ID: 1
Team ID: 2
Team ID: 3
Team ID: 4
Team ID: 5
Team ID: 6
Team ID: 7

Group ID: 1
Team ID: 8
Team ID: 9
Team ID: 10
Team ID: 11
Team ID: 12
Team ID: 13
Team ID: 14
Team ID: 15
Team ID: 16


Games
Game ID: 0, HomeTeam: 0, AwayTeam: 7, HomeScore: 6.00, AwayScore: 9.00
Game ID: 1, HomeTeam: 1, AwayTeam: 6, HomeScore: 7.00, AwayScore: 4.00
Game ID: 2, HomeTeam: 2, AwayTeam: 5, HomeScore: 4.00, AwayScore: 7.00
Game ID: 3, HomeTeam: 3, AwayTeam: 4, HomeScore: 1.00, AwayScore: 2.00
Game ID: 4, HomeTeam: 0, AwayTeam: 6, HomeScore: 1.00, AwayScore: 3.00
Game ID: 5, HomeTeam: 2, AwayTeam: 5, HomeScore: 5.00, AwayScore: 8.00
Game ID: 6, HomeTeam: 3, AwayTeam: 4, HomeScore: 2.00, AwayScore: 4.00
Game ID: 7, HomeTeam: 7, AwayTeam: 1, HomeScore: 3.00, AwayScore: 5.00
Game ID: 8, HomeTeam: 0, AwayTeam: 5, HomeScore: 3.00, AwayScore: 3.00
Game ID: 9, HomeTeam: 3, AwayTeam: 4, HomeScore: 7.00, AwayScore: 2.00
Game ID: 10, HomeTeam: 7, AwayTeam: 1, HomeScore: 2.00, AwayScore: 4.00
Game ID: 11, HomeTeam: 6, AwayTeam: 2, HomeScore: 6.00, AwayScore: 9.00
Game ID: 12, HomeTeam: 0, AwayTeam: 4, HomeScore: 3.00, AwayScore: 3.00
Game ID: 13, HomeTeam: 7, AwayTeam: 1, HomeScore: 8.00, AwayScore: 2.00
Game ID: 14, HomeTeam: 6, AwayTeam: 2, HomeScore: 9.00, AwayScore: 7.00
Game ID: 15, HomeTeam: 5, AwayTeam: 3, HomeScore: 5.00, AwayScore: 0.00
Game ID: 16, HomeTeam: 0, AwayTeam: 1, HomeScore: 2.00, AwayScore: 6.00
Game ID: 17, HomeTeam: 6, AwayTeam: 2, HomeScore: 10.00, AwayScore: 1.00
Game ID: 18, HomeTeam: 5, AwayTeam: 3, HomeScore: 6.00, AwayScore: 1.00
Game ID: 19, HomeTeam: 4, AwayTeam: 7, HomeScore: 7.00, AwayScore: 3.00
Game ID: 20, HomeTeam: 0, AwayTeam: 2, HomeScore: 2.00, AwayScore: 5.00
Game ID: 21, HomeTeam: 5, AwayTeam: 3, HomeScore: 5.00, AwayScore: 3.00
Game ID: 22, HomeTeam: 4, AwayTeam: 7, HomeScore: 4.00, AwayScore: 5.00
Game ID: 23, HomeTeam: 1, AwayTeam: 6, HomeScore: 3.00, AwayScore: 3.00
Game ID: 24, HomeTeam: 0, AwayTeam: 3, HomeScore: 8.00, AwayScore: 4.00
Game ID: 25, HomeTeam: 4, AwayTeam: 7, HomeScore: 9.00, AwayScore: 3.00
Game ID: 26, HomeTeam: 1, AwayTeam: 6, HomeScore: 9.00, AwayScore: 1.00
Game ID: 27, HomeTeam: 2, AwayTeam: 5, HomeScore: 10.00, AwayScore: 1.00
Game ID: 29, HomeTeam: 9, AwayTeam: 16, HomeScore: 2.00, AwayScore: 7.00
Game ID: 30, HomeTeam: 10, AwayTeam: 15, HomeScore: 2.00, AwayScore: 3.00
Game ID: 31, HomeTeam: 11, AwayTeam: 14, HomeScore: 9.00, AwayScore: 7.00
Game ID: 32, HomeTeam: 12, AwayTeam: 13, HomeScore: 8.00, AwayScore: 7.00
Game ID: 33, HomeTeam: 8, AwayTeam: 16, HomeScore: 2.00, AwayScore: 4.00
Game ID: 34, HomeTeam: 10, AwayTeam: 15, HomeScore: 9.00, AwayScore: 7.00
Game ID: 35, HomeTeam: 11, AwayTeam: 14, HomeScore: 10.00, AwayScore: 9.00
Game ID: 36, HomeTeam: 12, AwayTeam: 13, HomeScore: 1.00, AwayScore: 5.00
Game ID: 38, HomeTeam: 8, AwayTeam: 15, HomeScore: 9.00, AwayScore: 10.00
Game ID: 39, HomeTeam: 11, AwayTeam: 14, HomeScore: 3.00, AwayScore: 7.00
Game ID: 40, HomeTeam: 12, AwayTeam: 13, HomeScore: 7.00, AwayScore: 6.00
Game ID: 42, HomeTeam: 16, AwayTeam: 10, HomeScore: 6.00, AwayScore: 6.00
Game ID: 43, HomeTeam: 8, AwayTeam: 14, HomeScore: 8.00, AwayScore: 4.00
Game ID: 44, HomeTeam: 12, AwayTeam: 13, HomeScore: 1.00, AwayScore: 10.00
Game ID: 46, HomeTeam: 16, AwayTeam: 10, HomeScore: 9.00, AwayScore: 3.00
Game ID: 47, HomeTeam: 15, AwayTeam: 11, HomeScore: 7.00, AwayScore: 6.00
Game ID: 48, HomeTeam: 8, AwayTeam: 13, HomeScore: 1.00, AwayScore: 7.00
Game ID: 50, HomeTeam: 16, AwayTeam: 10, HomeScore: 6.00, AwayScore: 4.00
Game ID: 51, HomeTeam: 15, AwayTeam: 11, HomeScore: 2.00, AwayScore: 5.00
Game ID: 52, HomeTeam: 14, AwayTeam: 12, HomeScore: 2.00, AwayScore: 2.00
Game ID: 53, HomeTeam: 8, AwayTeam: 9, HomeScore: 6.00, AwayScore: 1.00
Game ID: 54, HomeTeam: 16, AwayTeam: 10, HomeScore: 3.00, AwayScore: 4.00
Game ID: 55, HomeTeam: 15, AwayTeam: 11, HomeScore: 4.00, AwayScore: 6.00
Game ID: 56, HomeTeam: 14, AwayTeam: 12, HomeScore: 6.00, AwayScore: 6.00
Game ID: 58, HomeTeam: 8, AwayTeam: 10, HomeScore: 7.00, AwayScore: 8.00
Game ID: 59, HomeTeam: 15, AwayTeam: 11, HomeScore: 0.00, AwayScore: 7.00
Game ID: 60, HomeTeam: 14, AwayTeam: 12, HomeScore: 4.00, AwayScore: 5.00
Game ID: 62, HomeTeam: 9, AwayTeam: 16, HomeScore: 6.00, AwayScore: 4.00
Game ID: 63, HomeTeam: 8, AwayTeam: 11, HomeScore: 0.00, AwayScore: 0.00
Game ID: 64, HomeTeam: 14, AwayTeam: 12, HomeScore: 0.00, AwayScore: 9.00
Game ID: 66, HomeTeam: 9, AwayTeam: 16, HomeScore: 6.00, AwayScore: 6.00
Game ID: 67, HomeTeam: 10, AwayTeam: 15, HomeScore: 8.00, AwayScore: 9.00
Game ID: 68, HomeTeam: 8, AwayTeam: 12, HomeScore: 5.00, AwayScore: 6.00
Game ID: 70, HomeTeam: 9, AwayTeam: 16, HomeScore: 0.00, AwayScore: 8.00
Game ID: 71, HomeTeam: 10, AwayTeam: 15, HomeScore: 2.00, AwayScore: 6.00
Game ID: 72, HomeTeam: 11, AwayTeam: 14, HomeScore: 2.00, AwayScore: 2.00

You can also print statistics for the current tournament if we add the following code at the end of the main function.

	stats, err := tournify.GetGroupTournamentStats(tournament, 3, 0, 1)
	if err != nil {
		panic(err)
	}

	fmt.Println(tournify.PrintGroupTournamentStats(stats))

This will print the stats for the current tournament which will look similar to the following example

Group   Team    Played  Wins    Ties    Losses  +/-     Diff    Points
0       1       7       5       1       1       36/23   13      16
0       5       7       5       1       1       35/26   9       16
0       4       7       4       1       2       31/24   7       13
0       6       7       3       1       3       36/37   -1      10
0       2       7       3       0       4       41/43   -2      9
0       7       7       3       0       4       33/37   -4      9
0       0       7       1       2       4       25/33   -8      5
0       3       7       1       0       6       18/32   -14     3
1       16      9       5       2       2       53/33   20      17
1       11      9       5       2       2       48/38   10      17
1       12      9       5       2       2       45/45   0       17
1       15      9       5       0       4       48/54   -6      15
1       13      9       3       4       2       35/18   17      13
1       10      9       3       1       5       46/56   -10     10
1       -1      9       0       9       0       0/0     0       9
1       8       9       2       2       5       38/40   -2      8
1       9       9       1       5       3       15/31   -16     8
1       14      9       1       3       5       41/54   -13     6

Teams are ordered by the number of points. If a team has an equal number of points as another the diff value is used as a tie-breaker. If the diff value is also the same then the points scored against other teams is used.

Elimination tournaments are also possible. Here is an example of an elimination tournament with 8 teams:

package main

import (
	"fmt"
	"github.com/tournify/tournify"
	"math"
	"math/rand"
	"time"
)

func main() {
	teams := []tournify.Team{
		{ID: 0},
		{ID: 1},
		{ID: 2},
		{ID: 3},
		{ID: 4},
		{ID: 5},
		{ID: 6},
		{ID: 7},
	}

	teamInterfaces := make([]tournify.TeamInterface, len(teams))

	for i := range teams {
		teamInterfaces[i] = &teams[i]
	}

	tournament := tournify.CreateEliminationTournamentFromTeams(teamInterfaces)

	for _, game := range tournament.GetGames() {
		err := tournament.SetGameScore(game, randomEvenFloat(0.0, 100.0), randomEvenFloat(0.0, 100.0))
		if err != nil {
			panic(err)
		}
	}

	// The print method gives us a string representing the current tournament
	fmt.Println(tournament.Print())

	// Loop eliminated teams
	fmt.Println("Eliminated teams")
	for _, team := range tournament.GetEliminatedTeams() {
		fmt.Printf("Team ID: %d\n", team.GetID())
	}

	fmt.Println()

	// Loop remaining teams
	fmt.Println("Remaining teams")
	for _, team := range tournament.GetRemainingTeams() {
		fmt.Printf("Team ID: %d\n", team.GetID())
	}
}

func randomEvenFloat(min float64, max float64) float64 {
	rand.Seed(time.Now().UnixNano())
	return math.RoundToEven(min + rand.Float64()*(max-min))
}

The output from the above code will be something like the following:

TournamentType: Elimination

Teams
Team ID: 0
Team ID: 1
Team ID: 2
Team ID: 3
Team ID: 4
Team ID: 5
Team ID: 6
Team ID: 7

Games
Game ID: 0, HomeTeam: 0, AwayTeam: 1, HomeScore: 85.00, AwayScore: 55.00
Game ID: 1, HomeTeam: 2, AwayTeam: 3, HomeScore: 14.00, AwayScore: 10.00
Game ID: 2, HomeTeam: 4, AwayTeam: 5, HomeScore: 53.00, AwayScore: 49.00
Game ID: 3, HomeTeam: 6, AwayTeam: 7, HomeScore: 95.00, AwayScore: 91.00
Game ID: 4, HomeTeam: 0, AwayTeam: 2, HomeScore: 34.00, AwayScore: 31.00
Game ID: 5, HomeTeam: 4, AwayTeam: 6, HomeScore: 0.00, AwayScore: 70.00
Game ID: 6, HomeTeam: 0, AwayTeam: 6, HomeScore: 13.00, AwayScore: 12.00

Eliminated teams
Team ID: 1
Team ID: 2
Team ID: 3
Team ID: 4
Team ID: 5
Team ID: 7

Remaining teams
Team ID: 0
Team ID: 6

Contributing

Please see contributing.

web's People

Contributors

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Watchers

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web's Issues

Group tournament question

The question, how many teams are eliminated for each group should either be removed completely or changed to ask how many teams continue to an elimination tournament.

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