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core_leaderboard.go
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core_leaderboard.go
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// Copyright 2018 The Nakama Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"bytes"
"context"
"database/sql"
"encoding/base64"
"encoding/gob"
"strconv"
"strings"
"time"
"github.com/gofrs/uuid"
"github.com/golang/protobuf/ptypes/timestamp"
"github.com/golang/protobuf/ptypes/wrappers"
"github.com/heroiclabs/nakama/api"
"github.com/lib/pq"
"github.com/pkg/errors"
"go.uber.org/zap"
)
var (
ErrLeaderboardNotFound = errors.New("leaderboard not found")
ErrLeaderboardAuthoritative = errors.New("leaderboard only allows authoritative submissions")
ErrLeaderboardInvalidCursor = errors.New("leaderboard cursor invalid")
)
type leaderboardRecordListCursor struct {
// Query hint.
IsNext bool
// ID fields.
LeaderboardId string
ExpiryTime int64
Score int64
Subscore int64
OwnerId string
Rank int64
}
func LeaderboardRecordsList(ctx context.Context, logger *zap.Logger, db *sql.DB, leaderboardCache LeaderboardCache, rankCache LeaderboardRankCache, leaderboardId string, limit *wrappers.Int32Value, cursor string, ownerIds []string, overrideExpiry int64) (*api.LeaderboardRecordList, error) {
leaderboard := leaderboardCache.Get(leaderboardId)
if leaderboard == nil {
return nil, ErrLeaderboardNotFound
}
expiryTime := overrideExpiry
if expiryTime == 0 {
now := time.Now().UTC()
if leaderboard.IsTournament() {
_, _, expiryTime = calculateTournamentDeadlines(leaderboard, now)
} else if leaderboard.ResetSchedule != nil {
expiryTime = leaderboard.ResetSchedule.Next(now).UTC().Unix()
}
}
records := make([]*api.LeaderboardRecord, 0)
ownerRecords := make([]*api.LeaderboardRecord, 0)
var nextCursorStr, prevCursorStr string
if limit != nil {
limitNumber := int(limit.Value)
var incomingCursor *leaderboardRecordListCursor
if cursor != "" {
if cb, err := base64.StdEncoding.DecodeString(cursor); err != nil {
return nil, ErrLeaderboardInvalidCursor
} else {
incomingCursor = &leaderboardRecordListCursor{}
if err := gob.NewDecoder(bytes.NewReader(cb)).Decode(incomingCursor); err != nil {
return nil, ErrLeaderboardInvalidCursor
}
}
if leaderboardId != incomingCursor.LeaderboardId {
// Cursor is for a different leaderboard.
return nil, ErrLeaderboardInvalidCursor
} else if expiryTime != incomingCursor.ExpiryTime {
// Leaderboard expiry has rolled over since this cursor was generated.
return nil, ErrLeaderboardInvalidCursor
}
}
query := "SELECT owner_id, username, score, subscore, num_score, max_num_score, metadata, create_time, update_time FROM leaderboard_record WHERE leaderboard_id = $1 AND expiry_time = $2"
if incomingCursor == nil {
// Ascending doesn't need an ordering clause.
if leaderboard.SortOrder == LeaderboardSortOrderDescending {
query += " ORDER BY score DESC, subscore DESC, owner_id DESC"
}
} else {
if (leaderboard.SortOrder == LeaderboardSortOrderAscending && incomingCursor.IsNext) || (leaderboard.SortOrder == LeaderboardSortOrderDescending && !incomingCursor.IsNext) {
// Ascending and next page == descending and previous page.
query += " AND (leaderboard_id, expiry_time, score, subscore, owner_id) > ($1, $2, $4, $5, $6)"
} else {
// Ascending and previous page == descending and next page.
query += " AND (leaderboard_id, expiry_time, score, subscore, owner_id) < ($1, $2, $4, $5, $6) ORDER BY score DESC, subscore DESC, owner_id DESC"
}
}
query += " LIMIT $3"
params := make([]interface{}, 0, 6)
params = append(params, leaderboardId, time.Unix(expiryTime, 0).UTC(), limitNumber+1)
if incomingCursor != nil {
params = append(params, incomingCursor.Score, incomingCursor.Subscore, incomingCursor.OwnerId)
}
logger.Debug("Leaderboard record list query", zap.String("query", query), zap.Any("params", params))
rows, err := db.QueryContext(ctx, query, params...)
if err != nil {
logger.Error("Error listing leaderboard records", zap.Error(err))
return nil, err
}
defer rows.Close()
rank := int64(0)
if incomingCursor != nil {
rank = incomingCursor.Rank
}
records = make([]*api.LeaderboardRecord, 0, limitNumber)
var nextCursor, prevCursor *leaderboardRecordListCursor
var dbOwnerId string
var dbUsername sql.NullString
var dbScore int64
var dbSubscore int64
var dbNumScore int32
var dbMaxNumScore int32
var dbMetadata string
var dbCreateTime pq.NullTime
var dbUpdateTime pq.NullTime
for rows.Next() {
if len(records) >= limitNumber {
nextCursor = &leaderboardRecordListCursor{
IsNext: true,
LeaderboardId: leaderboardId,
ExpiryTime: expiryTime,
Score: dbScore,
Subscore: dbSubscore,
OwnerId: dbOwnerId,
Rank: rank,
}
break
}
err = rows.Scan(&dbOwnerId, &dbUsername, &dbScore, &dbSubscore, &dbNumScore, &dbMaxNumScore, &dbMetadata, &dbCreateTime, &dbUpdateTime)
if err != nil {
logger.Error("Error parsing listed leaderboard records", zap.Error(err))
return nil, err
}
if incomingCursor != nil && !incomingCursor.IsNext {
rank--
} else {
rank++
}
record := &api.LeaderboardRecord{
LeaderboardId: leaderboardId,
OwnerId: dbOwnerId,
Score: dbScore,
Subscore: dbSubscore,
NumScore: dbNumScore,
MaxNumScore: uint32(dbMaxNumScore),
Metadata: dbMetadata,
CreateTime: ×tamp.Timestamp{Seconds: dbCreateTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: dbUpdateTime.Time.Unix()},
Rank: rank,
}
if dbUsername.Valid {
record.Username = &wrappers.StringValue{Value: dbUsername.String}
}
if expiryTime != 0 {
record.ExpiryTime = ×tamp.Timestamp{Seconds: expiryTime}
}
records = append(records, record)
// There can only be a previous page if this is a paginated listing.
if incomingCursor != nil && prevCursor == nil {
prevCursor = &leaderboardRecordListCursor{
IsNext: false,
LeaderboardId: leaderboardId,
ExpiryTime: expiryTime,
Score: dbScore,
Subscore: dbSubscore,
OwnerId: dbOwnerId,
Rank: rank,
}
}
}
if incomingCursor != nil && !incomingCursor.IsNext {
// If this was a previous page listing, flip the results to their normal order and swap the cursors.
nextCursor, nextCursor.IsNext, nextCursor.Rank, prevCursor, prevCursor.IsNext, prevCursor.Rank = prevCursor, prevCursor.IsNext, prevCursor.Rank, nextCursor, nextCursor.IsNext, nextCursor.Rank
for i, j := 0, len(records)-1; i < j; i, j = i+1, j-1 {
records[i], records[i].Rank, records[j], records[j].Rank = records[j], records[j].Rank, records[i], records[i].Rank
}
}
if nextCursor != nil {
cursorBuf := new(bytes.Buffer)
if gob.NewEncoder(cursorBuf).Encode(nextCursor); err != nil {
logger.Error("Error creating leaderboard records list next cursor", zap.Error(err))
return nil, err
}
nextCursorStr = base64.StdEncoding.EncodeToString(cursorBuf.Bytes())
}
if prevCursor != nil {
cursorBuf := new(bytes.Buffer)
if gob.NewEncoder(cursorBuf).Encode(prevCursor); err != nil {
logger.Error("Error creating leaderboard records list previous cursor", zap.Error(err))
return nil, err
}
prevCursorStr = base64.StdEncoding.EncodeToString(cursorBuf.Bytes())
}
}
if len(ownerIds) != 0 {
params := make([]interface{}, 0, len(ownerIds)+2)
params = append(params, leaderboardId, time.Unix(expiryTime, 0).UTC())
statements := make([]string, len(ownerIds))
for i, ownerId := range ownerIds {
params = append(params, ownerId)
statements[i] = "$" + strconv.Itoa(i+3)
}
query := "SELECT owner_id, username, score, subscore, num_score, max_num_score, metadata, create_time, update_time FROM leaderboard_record WHERE leaderboard_id = $1 AND expiry_time = $2 AND owner_id IN (" + strings.Join(statements, ", ") + ")"
rows, err := db.QueryContext(ctx, query, params...)
if err != nil {
logger.Error("Error reading leaderboard records", zap.Error(err))
return nil, err
}
defer rows.Close()
ownerRecords = make([]*api.LeaderboardRecord, 0, len(ownerIds))
var dbOwnerId string
var dbUsername sql.NullString
var dbScore int64
var dbSubscore int64
var dbNumScore int32
var dbMaxNumScore int32
var dbMetadata string
var dbCreateTime pq.NullTime
var dbUpdateTime pq.NullTime
for rows.Next() {
err = rows.Scan(&dbOwnerId, &dbUsername, &dbScore, &dbSubscore, &dbNumScore, &dbMaxNumScore, &dbMetadata, &dbCreateTime, &dbUpdateTime)
if err != nil {
logger.Error("Error parsing read leaderboard records", zap.Error(err))
return nil, err
}
record := &api.LeaderboardRecord{
// Rank filled in in bulk below.
LeaderboardId: leaderboardId,
OwnerId: dbOwnerId,
Score: dbScore,
Subscore: dbSubscore,
NumScore: dbNumScore,
MaxNumScore: uint32(dbMaxNumScore),
Metadata: dbMetadata,
CreateTime: ×tamp.Timestamp{Seconds: dbCreateTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: dbUpdateTime.Time.Unix()},
}
if dbUsername.Valid {
record.Username = &wrappers.StringValue{Value: dbUsername.String}
}
if expiryTime != 0 {
record.ExpiryTime = ×tamp.Timestamp{Seconds: expiryTime}
}
ownerRecords = append(ownerRecords, record)
}
}
// Bulk fill in the ranks of any owner records requested.
rankCache.Fill(leaderboardId, expiryTime, ownerRecords)
return &api.LeaderboardRecordList{
Records: records,
OwnerRecords: ownerRecords,
NextCursor: nextCursorStr,
PrevCursor: prevCursorStr,
}, nil
}
func LeaderboardRecordWrite(ctx context.Context, logger *zap.Logger, db *sql.DB, leaderboardCache LeaderboardCache, rankCache LeaderboardRankCache, caller uuid.UUID, leaderboardId, ownerId, username string, score, subscore int64, metadata string) (*api.LeaderboardRecord, error) {
leaderboard := leaderboardCache.Get(leaderboardId)
if leaderboard == nil {
return nil, ErrLeaderboardNotFound
}
if leaderboard.Authoritative && caller != uuid.Nil {
return nil, ErrLeaderboardAuthoritative
}
expiryTime := int64(0)
if leaderboard.ResetSchedule != nil {
expiryTime = leaderboard.ResetSchedule.Next(time.Now().UTC()).UTC().Unix()
}
var opSql string
var scoreDelta int64
var subscoreDelta int64
var scoreAbs int64
var subscoreAbs int64
switch leaderboard.Operator {
case LeaderboardOperatorIncrement:
opSql = "score = leaderboard_record.score + $8::BIGINT, subscore = leaderboard_record.subscore + $9::BIGINT"
scoreDelta = score
subscoreDelta = subscore
scoreAbs = score
subscoreAbs = subscore
case LeaderboardOperatorSet:
opSql = "score = $8::BIGINT, subscore = $9::BIGINT"
scoreDelta = score
subscoreDelta = subscore
scoreAbs = score
subscoreAbs = subscore
case LeaderboardOperatorBest:
fallthrough
default:
if leaderboard.SortOrder == LeaderboardSortOrderAscending {
// Lower score is better.
opSql = "score = ((leaderboard_record.score + $8::BIGINT - abs(leaderboard_record.score - $8::BIGINT)) / 2)::BIGINT, subscore = ((leaderboard_record.subscore + $9::BIGINT - abs(leaderboard_record.subscore - $9::BIGINT)) / 2)::BIGINT"
} else {
// Higher score is better.
opSql = "score = ((leaderboard_record.score + $8::BIGINT + abs(leaderboard_record.score - $8::BIGINT)) / 2)::BIGINT, subscore = ((leaderboard_record.subscore + $9::BIGINT + abs(leaderboard_record.subscore - $9::BIGINT)) / 2)::BIGINT"
}
scoreDelta = score
subscoreDelta = subscore
scoreAbs = score
subscoreAbs = subscore
}
query := `INSERT INTO leaderboard_record (leaderboard_id, owner_id, username, score, subscore, metadata, expiry_time)
VALUES ($1, $2, $3, $4, $5, COALESCE($6, '{}'::JSONB), $7)
ON CONFLICT (owner_id, leaderboard_id, expiry_time)
DO UPDATE SET ` + opSql + `, num_score = leaderboard_record.num_score + 1, metadata = COALESCE($6, leaderboard_record.metadata), update_time = now()`
params := make([]interface{}, 0, 9)
params = append(params, leaderboardId, ownerId)
if username == "" {
params = append(params, nil)
} else {
params = append(params, username)
}
params = append(params, scoreAbs, subscoreAbs)
if metadata == "" {
params = append(params, nil)
} else {
params = append(params, metadata)
}
params = append(params, time.Unix(expiryTime, 0).UTC(), scoreDelta, subscoreDelta)
_, err := db.ExecContext(ctx, query, params...)
if err != nil {
logger.Error("Error writing leaderboard record", zap.Error(err))
return nil, err
}
var dbUsername sql.NullString
var dbScore int64
var dbSubscore int64
var dbNumScore int32
var dbMaxNumScore int32
var dbMetadata string
var dbCreateTime pq.NullTime
var dbUpdateTime pq.NullTime
query = "SELECT username, score, subscore, num_score, max_num_score, metadata, create_time, update_time FROM leaderboard_record WHERE leaderboard_id = $1 AND owner_id = $2 AND expiry_time = $3"
err = db.QueryRowContext(ctx, query, leaderboardId, ownerId, time.Unix(expiryTime, 0).UTC()).Scan(&dbUsername, &dbScore, &dbSubscore, &dbNumScore, &dbMaxNumScore, &dbMetadata, &dbCreateTime, &dbUpdateTime)
if err != nil {
logger.Error("Error after writing leaderboard record", zap.Error(err))
return nil, err
}
// ensure we have the latest dbscore, dbsubscore
newRank := rankCache.Insert(leaderboardId, expiryTime, leaderboard.SortOrder, uuid.Must(uuid.FromString(ownerId)), dbScore, dbSubscore)
record := &api.LeaderboardRecord{
Rank: newRank,
LeaderboardId: leaderboardId,
OwnerId: ownerId,
Score: dbScore,
Subscore: dbSubscore,
NumScore: dbNumScore,
MaxNumScore: uint32(dbMaxNumScore),
Metadata: dbMetadata,
CreateTime: ×tamp.Timestamp{Seconds: dbCreateTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: dbUpdateTime.Time.Unix()},
}
if dbUsername.Valid {
record.Username = &wrappers.StringValue{Value: dbUsername.String}
}
if expiryTime != 0 {
record.ExpiryTime = ×tamp.Timestamp{Seconds: expiryTime}
}
return record, nil
}
func LeaderboardRecordDelete(ctx context.Context, logger *zap.Logger, db *sql.DB, leaderboardCache LeaderboardCache, rankCache LeaderboardRankCache, caller uuid.UUID, leaderboardId, ownerId string) error {
leaderboard := leaderboardCache.Get(leaderboardId)
if leaderboard == nil {
return nil
}
if leaderboard.Authoritative && caller != uuid.Nil {
return ErrLeaderboardAuthoritative
}
expiryTime := int64(0)
if leaderboard.ResetSchedule != nil {
expiryTime = leaderboard.ResetSchedule.Next(time.Now().UTC()).UTC().Unix()
}
query := "DELETE FROM leaderboard_record WHERE leaderboard_id = $1 AND owner_id = $2 AND expiry_time = $3"
_, err := db.ExecContext(ctx, query, leaderboardId, ownerId, time.Unix(expiryTime, 0).UTC())
if err != nil {
logger.Error("Error deleting leaderboard record", zap.Error(err))
return err
}
rankCache.Delete(leaderboardId, expiryTime, uuid.Must(uuid.FromString(ownerId)))
return nil
}
func LeaderboardRecordReadAll(ctx context.Context, logger *zap.Logger, db *sql.DB, userID uuid.UUID) ([]*api.LeaderboardRecord, error) {
query := "SELECT leaderboard_id, owner_id, username, score, subscore, num_score, max_num_score, metadata, create_time, update_time, expiry_time FROM leaderboard_record WHERE owner_id = $1"
rows, err := db.QueryContext(ctx, query, userID.String())
if err != nil {
logger.Error("Error reading all leaderboard records for user", zap.String("user_id", userID.String()), zap.Error(err))
return nil, err
}
defer rows.Close()
return parseLeaderboardRecords(logger, rows)
}
func LeaderboardRecordsDeleteAll(ctx context.Context, logger *zap.Logger, tx *sql.Tx, userID uuid.UUID) error {
query := "DELETE FROM leaderboard_record WHERE owner_id = $1"
_, err := tx.ExecContext(ctx, query, userID.String())
if err != nil {
logger.Error("Error deleting all leaderboard records for user", zap.String("user_id", userID.String()), zap.Error(err))
return err
}
return nil
}
func LeaderboardRecordsHaystack(ctx context.Context, logger *zap.Logger, db *sql.DB, leaderboardCache LeaderboardCache, rankCache LeaderboardRankCache, leaderboardId string, ownerId uuid.UUID, limit int) ([]*api.LeaderboardRecord, error) {
leaderboard := leaderboardCache.Get(leaderboardId)
if leaderboard == nil {
return nil, ErrLeaderboardNotFound
}
sortOrder := leaderboard.SortOrder
expiryTime := time.Unix(0, 0).UTC()
if leaderboard.ResetSchedule != nil {
expiryTime = leaderboard.ResetSchedule.Next(time.Now().UTC()).UTC()
}
return getLeaderboardRecordsHaystack(ctx, logger, db, rankCache, ownerId, limit, leaderboard.Id, sortOrder, expiryTime)
}
func getLeaderboardRecordsHaystack(ctx context.Context, logger *zap.Logger, db *sql.DB, rankCache LeaderboardRankCache, ownerId uuid.UUID, limit int, leaderboardId string, sortOrder int, expiryTime time.Time) ([]*api.LeaderboardRecord, error) {
var dbLeaderboardId string
var dbOwnerId string
var dbUsername sql.NullString
var dbScore int64
var dbSubscore int64
var dbNumScore int32
var dbMaxNumScore int32
var dbMetadata string
var dbCreateTime pq.NullTime
var dbUpdateTime pq.NullTime
var dbExpiryTime pq.NullTime
findQuery := `SELECT leaderboard_id, owner_id, username, score, subscore, num_score, max_num_score, metadata, create_time, update_time, expiry_time
FROM leaderboard_record
WHERE owner_id = $1
AND leaderboard_id = $2
AND expiry_time = $3`
logger.Debug("Leaderboard haystack lookup", zap.String("query", findQuery))
err := db.QueryRowContext(ctx, findQuery, ownerId, leaderboardId, expiryTime).Scan(&dbLeaderboardId, &dbOwnerId, &dbUsername, &dbScore, &dbSubscore, &dbNumScore, &dbMaxNumScore, &dbMetadata, &dbCreateTime, &dbUpdateTime, &dbExpiryTime)
if err == sql.ErrNoRows {
return []*api.LeaderboardRecord{}, nil
} else if err != nil {
logger.Error("Could not load owner record in leaderboard records list haystack", zap.Error(err), zap.String("leaderboard_id", leaderboardId), zap.String("owner_id", ownerId.String()))
return nil, err
}
ownerRecord := &api.LeaderboardRecord{
// Record populated later.
LeaderboardId: dbLeaderboardId,
OwnerId: dbOwnerId,
Score: dbScore,
Subscore: dbSubscore,
NumScore: dbNumScore,
MaxNumScore: uint32(dbMaxNumScore),
Metadata: dbMetadata,
CreateTime: ×tamp.Timestamp{Seconds: dbCreateTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: dbUpdateTime.Time.Unix()},
}
if dbUsername.Valid {
ownerRecord.Username = &wrappers.StringValue{Value: dbUsername.String}
}
if expiryTime := dbExpiryTime.Time.Unix(); expiryTime != 0 {
ownerRecord.ExpiryTime = ×tamp.Timestamp{Seconds: expiryTime}
}
if limit == 1 {
ownerRecord.Rank = rankCache.Get(leaderboardId, expiryTime.Unix(), ownerId)
return []*api.LeaderboardRecord{ownerRecord}, nil
}
query := `SELECT leaderboard_id, owner_id, username, score, subscore, num_score, max_num_score, metadata, create_time, update_time, expiry_time
FROM leaderboard_record
AND leaderboard_id = $1
AND expiry_time = $2`
// First half.
params := []interface{}{leaderboardId, expiryTime, ownerRecord.Score, ownerRecord.Subscore, ownerId}
firstQuery := query
if sortOrder == LeaderboardSortOrderAscending {
// Lower score is better, but get in reverse order from current user to get those immediately above.
firstQuery += " AND (score, subscore, owner_id) < ($3, $4, $5) ORDER BY score DESC, subscore DESC"
} else {
// Higher score is better.
firstQuery += " AND (score, subscore, owner_id) > ($3, $4, $5) ORDER BY score ASC, subscore ASC"
}
firstParams := append(params, limit)
firstQuery += " LIMIT $6"
firstRows, err := db.QueryContext(ctx, firstQuery, firstParams...)
if err != nil {
logger.Error("Could not execute leaderboard records list query", zap.Error(err))
return nil, err
}
defer firstRows.Close()
firstRecords, err := parseLeaderboardRecords(logger, firstRows)
if err != nil {
return nil, err
}
// We went 'up' on the leaderboard, so reverse the first half of records.
for left, right := 0, len(firstRecords)-1; left < right; left, right = left+1, right-1 {
firstRecords[left], firstRecords[right] = firstRecords[right], firstRecords[left]
}
secondQuery := query
if sortOrder == LeaderboardSortOrderAscending {
// Lower score is better.
secondQuery += " AND (score, subscore, owner_id) > ($3, $4, $5) ORDER BY score ASC, subscore ASC"
} else {
// Higher score is better.
secondQuery += " AND (score, subscore, owner_id) < ($3, $4, $5) ORDER BY score DESC, subscore DESC"
}
secondLimit := limit / 2
if l := len(firstRecords); l < limit/2 {
secondLimit = limit - l
}
secondParams := append(params, secondLimit)
secondQuery += " LIMIT $6"
secondRows, err := db.QueryContext(ctx, secondQuery, secondParams...)
if err != nil {
logger.Error("Could not execute leaderboard records list query", zap.Error(err))
return nil, err
}
defer secondRows.Close()
secondRecords, err := parseLeaderboardRecords(logger, secondRows)
if err != nil {
return nil, err
}
records := append(firstRecords, ownerRecord)
records = append(records, secondRecords...)
start := len(records) - int(limit)
if start < 0 {
start = 0
}
records = records[start:]
rankCache.Fill(leaderboardId, expiryTime.Unix(), records)
return records, nil
}
func parseLeaderboardRecords(logger *zap.Logger, rows *sql.Rows) ([]*api.LeaderboardRecord, error) {
records := make([]*api.LeaderboardRecord, 0, 10)
var dbLeaderboardId string
var dbOwnerId string
var dbUsername sql.NullString
var dbScore int64
var dbSubscore int64
var dbNumScore int32
var dbMaxNumScore int32
var dbMetadata string
var dbCreateTime pq.NullTime
var dbUpdateTime pq.NullTime
var dbExpiryTime pq.NullTime
for rows.Next() {
if err := rows.Scan(&dbLeaderboardId, &dbOwnerId, &dbUsername, &dbScore, &dbSubscore, &dbNumScore, &dbMaxNumScore, &dbMetadata, &dbCreateTime, &dbUpdateTime, &dbExpiryTime); err != nil {
logger.Error("Could not execute leaderboard records list query", zap.Error(err))
return nil, err
}
record := &api.LeaderboardRecord{
LeaderboardId: dbLeaderboardId,
OwnerId: dbOwnerId,
Score: dbScore,
Subscore: dbSubscore,
NumScore: dbNumScore,
MaxNumScore: uint32(dbMaxNumScore),
Metadata: dbMetadata,
CreateTime: ×tamp.Timestamp{Seconds: dbCreateTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: dbUpdateTime.Time.Unix()},
}
if dbUsername.Valid {
record.Username = &wrappers.StringValue{Value: dbUsername.String}
}
expiryTime := dbExpiryTime.Time.Unix()
if expiryTime != 0 {
record.ExpiryTime = ×tamp.Timestamp{Seconds: expiryTime}
}
records = append(records, record)
}
return records, nil
}