core-old/internal/service/player.go

package service

import (
	"context"
	"fmt"
	"sort"

	"gitea.dwysokinski.me/twhelp/core/internal/domain"
	"gitea.dwysokinski.me/twhelp/core/internal/tw"
	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/codes"
	"go.opentelemetry.io/otel/trace"
)

const (
	playerChunkSize  = 1000
	playerMaxLimit   = 200
	playerSortMaxLen = 3
)

//counterfeiter:generate -o internal/mock/player_repository.gen.go . PlayerRepository
type PlayerRepository interface {
	CreateOrUpdate(ctx context.Context, params ...domain.CreatePlayerParams) error
	DeleteByID(ctx context.Context, ids ...int64) error
	List(ctx context.Context, params domain.ListPlayersParams) ([]domain.Player, int64, error)
}

//counterfeiter:generate -o internal/mock/player_getter.gen.go . PlayerGetter
type PlayerGetter interface {
	GetPlayers(ctx context.Context, baseURL string) ([]tw.Player, error)
}

type Player struct {
	repo   PlayerRepository
	client PlayerGetter
}

func NewPlayer(repo PlayerRepository, client PlayerGetter) *Player {
	return &Player{repo: repo, client: client}
}

func (p *Player) Refresh(ctx context.Context, key, url string) (int64, error) {
	ctx, span := tracer.Start(ctx, "Player.Refresh", trace.WithAttributes(
		attribute.String("server.key", key),
		attribute.String("server.url", url),
	))
	defer span.End()

	players, err := p.client.GetPlayers(ctx, url)
	if err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return 0, fmt.Errorf("TWClient.GetPlayers: %w", err)
	}

	if err := p.createOrUpdate(ctx, key, players); err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return 0, err
	}

	if err := p.delete(ctx, key, players); err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return 0, err
	}

	return int64(len(players)), nil
}

func (p *Player) createOrUpdate(ctx context.Context, key string, players []tw.Player) error {
	ctx, span := tracer.Start(ctx, "Player.createOrUpdate", trace.WithAttributes(
		attribute.String("server.key", key),
	))
	defer span.End()

	for i := 0; i < len(players); i += playerChunkSize {
		end := i + playerChunkSize
		if end > len(players) {
			end = len(players)
		}

		chunk := players[i:end]

		params := make([]domain.CreatePlayerParams, 0, len(chunk))
		for _, player := range chunk {
			params = append(params, domain.CreatePlayerParams{
				OpponentsDefeated: domain.OpponentsDefeated(player.OpponentsDefeated),
				ID:                player.ID,
				Name:              player.Name,
				NumVillages:       player.NumVillages,
				Points:            player.Points,
				Rank:              player.Rank,
				TribeID:           player.TribeID,
				ProfileURL:        player.ProfileURL,
				ServerKey:         key,
			})
		}
		if err := p.repo.CreateOrUpdate(ctx, params...); err != nil {
			span.RecordError(err)
			span.SetStatus(codes.Error, err.Error())
			return fmt.Errorf("PlayerRepository.CreateOrUpdate: %w", err)
		}
	}

	return nil
}

func (p *Player) delete(ctx context.Context, key string, existing []tw.Player) error {
	ctx, span := tracer.Start(ctx, "Player.delete", trace.WithAttributes(
		attribute.String("server.key", key),
	))
	defer span.End()

	//nolint:prealloc
	var playersToDelete []int64
	var lastID int64
	for {
		players, _, err := p.repo.List(ctx, domain.ListPlayersParams{
			ServerKeys: []string{key},
			IDGT: domain.NullInt64{
				Int64: lastID,
				Valid: true,
			},
			Deleted: domain.NullBool{
				Valid: true,
				Bool:  false,
			},
			Pagination: domain.Pagination{
				Limit: playerChunkSize,
			},
			Sort: []domain.PlayerSort{
				{By: domain.PlayerSortByID, Direction: domain.SortDirectionASC},
			},
		})
		if err != nil {
			span.RecordError(err)
			span.SetStatus(codes.Error, err.Error())
			return fmt.Errorf("PlayerRepository.List: %w", err)
		}

		for _, player := range players {
			i := sort.Search(len(existing), func(i int) bool {
				return existing[i].ID >= player.ID
			})
			if i < len(existing) && existing[i].ID == player.ID {
				continue
			}
			playersToDelete = append(playersToDelete, player.ID)
		}

		if len(players) < playerChunkSize {
			break
		}

		lastID = players[len(players)-1].ID
	}

	if err := p.repo.DeleteByID(ctx, playersToDelete...); err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return fmt.Errorf("PlayerRepository.DeleteByID: %w", err)
	}

	return nil
}

func (p *Player) List(ctx context.Context, params domain.ListPlayersParams) ([]domain.Player, int64, error) {
	ctx, span := tracer.Start(ctx, "Player.List")
	defer span.End()

	if len(params.Sort) == 0 {
		params.Sort = []domain.PlayerSort{
			{
				By:        domain.PlayerSortByID,
				Direction: domain.SortDirectionASC,
			},
		}
	}

	if len(params.Sort) > playerSortMaxLen {
		err := domain.ValidationError{
			Field: "sort",
			Err: domain.MaxLengthError{
				Max: playerSortMaxLen,
			},
		}
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return nil, 0, err
	}

	if params.Pagination.Limit == 0 {
		params.Pagination.Limit = playerMaxLimit
	}

	if err := validatePagination(params.Pagination, playerMaxLimit); err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return nil, 0, fmt.Errorf("validatePagination: %w", err)
	}

	players, count, err := p.repo.List(ctx, params)
	if err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return nil, 0, fmt.Errorf("PlayerRepository.List: %w", err)
	}

	return players, count, nil
}

func (p *Player) GetByServerKeyAndID(ctx context.Context, serverKey string, id int64, includeTribe bool) (domain.Player, error) {
	ctx, span := tracer.Start(ctx, "Player.GetByServerKeyAndID", trace.WithAttributes(
		attribute.String("server.key", serverKey),
		attribute.Int64("player.id", id),
	))
	defer span.End()

	players, _, err := p.repo.List(ctx, domain.ListPlayersParams{
		IDs:          []int64{id},
		ServerKeys:   []string{serverKey},
		IncludeTribe: includeTribe,
		Pagination: domain.Pagination{
			Limit: 1,
		},
	})
	if err != nil {
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return domain.Player{}, fmt.Errorf("PlayerRepository.List: %w", err)
	}
	if len(players) == 0 {
		err = domain.PlayerNotFoundError{
			ID: id,
		}
		span.RecordError(err)
		span.SetStatus(codes.Error, err.Error())
		return domain.Player{}, err
	}

	return players[0], nil
}