big ole refactor

internal/db/teamparticipation.go

@@ -0,0 +1,67 @@
+package db
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/uptrace/bun"
+)
+
+type TeamParticipation struct {
+	SeasonID int     `bun:",pk,unique:season_team"`
+	Season   *Season `bun:"rel:belongs-to,join:season_id=id"`
+	LeagueID int     `bun:",pk"`
+	League   *League `bun:"rel:belongs-to,join:league_id=id"`
+	TeamID   int     `bun:",pk,unique:season_team"`
+	Team     *Team   `bun:"rel:belongs-to,join:team_id=id"`
+}
+
+func NewTeamParticipation(ctx context.Context, tx bun.Tx,
+	seasonShortName, leagueShortName string, teamID int, audit *AuditMeta,
+) (*Team, *Season, *League, error) {
+	season, err := GetSeason(ctx, tx, seasonShortName)
+	if err != nil {
+		return nil, nil, nil, errors.Wrap(err, "GetSeason")
+	}
+	if season == nil {
+		return nil, nil, nil, errors.New("season not found")
+	}
+	league, err := GetLeague(ctx, tx, leagueShortName)
+	if err != nil {
+		return nil, nil, nil, errors.Wrap(err, "GetLeague")
+	}
+	if league == nil {
+		return nil, nil, nil, errors.New("league not found")
+	}
+	if !season.HasLeague(league.ID) {
+		return nil, nil, nil, errors.New("league is not assigned to the season")
+	}
+	team, err := GetTeam(ctx, tx, teamID)
+	if err != nil {
+		return nil, nil, nil, errors.Wrap(err, "GetTeam")
+	}
+	if team == nil {
+		return nil, nil, nil, errors.New("team not found")
+	}
+	if team.InSeason(season.ID) {
+		return nil, nil, nil, errors.New("team already in season")
+	}
+	participation := &TeamParticipation{
+		SeasonID: season.ID,
+		LeagueID: league.ID,
+		TeamID:   team.ID,
+	}
+
+	info := &AuditInfo{
+		"teams.join_season",
+		"team",
+		teamID,
+		map[string]any{"season_id": season.ID, "league_id": league.ID},
+	}
+	err = Insert(tx, participation).
+		WithAudit(audit, info).Exec(ctx)
+	if err != nil {
+		return nil, nil, nil, errors.Wrap(err, "db.Insert")
+	}
+	return team, season, league, nil
+}