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api_leaderboard.go
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/
api_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 (
"encoding/json"
"github.com/golang/protobuf/ptypes/empty"
"github.com/golang/protobuf/ptypes/wrappers"
"github.com/heroiclabs/nakama/api"
"github.com/satori/go.uuid"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func (s *ApiServer) DeleteLeaderboardRecord(ctx context.Context, in *api.DeleteLeaderboardRecordRequest) (*empty.Empty, error) {
if in.LeaderboardId == "" {
return nil, status.Error(codes.InvalidArgument, "Invalid leaderboard ID.")
}
userID := ctx.Value(ctxUserIDKey{}).(uuid.UUID)
err := LeaderboardRecordDelete(s.logger, s.db, s.leaderboardCache, userID, in.LeaderboardId, userID.String())
if err == ErrLeaderboardNotFound {
return nil, status.Error(codes.NotFound, "Leaderboard not found.")
} else if err == ErrLeaderboardAuthoritative {
return nil, status.Error(codes.PermissionDenied, "Leaderboard only allows authoritative score deletions.")
} else if err != nil {
return nil, status.Error(codes.Internal, "Error deleting score from leaderboard.")
}
return &empty.Empty{}, nil
}
func (s *ApiServer) ListLeaderboardRecords(ctx context.Context, in *api.ListLeaderboardRecordsRequest) (*api.LeaderboardRecordList, error) {
if in.LeaderboardId == "" {
return nil, status.Error(codes.InvalidArgument, "Invalid leaderboard ID.")
}
var limit *wrappers.Int32Value
if in.GetLimit() != nil {
if in.GetLimit().Value < 1 || in.GetLimit().Value > 100 {
return nil, status.Error(codes.InvalidArgument, "Invalid limit - limit must be between 1 and 100.")
}
limit = in.GetLimit()
} else if len(in.GetOwnerIds()) == 0 || in.GetCursor() != "" {
limit = &wrappers.Int32Value{Value: 1}
}
if len(in.GetOwnerIds()) != 0 {
for _, ownerId := range in.OwnerIds {
if _, err := uuid.FromString(ownerId); err != nil {
return nil, status.Error(codes.InvalidArgument, "One or more owner IDs are invalid.")
}
}
}
records, err := LeaderboardRecordsList(s.logger, s.db, s.leaderboardCache, in.LeaderboardId, limit, in.Cursor, in.OwnerIds)
if err == ErrLeaderboardNotFound {
return nil, status.Error(codes.NotFound, "Leaderboard not found.")
} else if err == ErrLeaderboardInvalidCursor {
return nil, status.Error(codes.InvalidArgument, "Cursor is invalid or expired.")
} else if err != nil {
return nil, status.Error(codes.Internal, "Error listing records from leaderboard.")
}
return records, nil
}
func (s *ApiServer) WriteLeaderboardRecord(ctx context.Context, in *api.WriteLeaderboardRecordRequest) (*api.LeaderboardRecord, error) {
if in.LeaderboardId == "" {
return nil, status.Error(codes.InvalidArgument, "Invalid leaderboard ID.")
} else if in.Record == nil {
return nil, status.Error(codes.InvalidArgument, "Invalid input, record score value is required.")
} else if in.Record.Score < 0 {
return nil, status.Error(codes.InvalidArgument, "Invalid score value, must be >= 0.")
} else if in.Record.Subscore < 0 {
return nil, status.Error(codes.InvalidArgument, "Invalid subscore value, must be >= 0.")
} else if in.Record.Metadata != "" {
var maybeJSON map[string]interface{}
if json.Unmarshal([]byte(in.Record.Metadata), &maybeJSON) != nil {
return nil, status.Error(codes.InvalidArgument, "Metadata value must be JSON, if provided.")
}
}
userID := ctx.Value(ctxUserIDKey{}).(uuid.UUID)
username := ctx.Value(ctxUsernameKey{}).(string)
record, err := LeaderboardRecordWrite(s.logger, s.db, s.leaderboardCache, userID, in.LeaderboardId, userID.String(), username, in.Record.Score, in.Record.Subscore, in.Record.Metadata)
if err == ErrLeaderboardNotFound {
return nil, status.Error(codes.NotFound, "Leaderboard not found.")
} else if err == ErrLeaderboardAuthoritative {
return nil, status.Error(codes.PermissionDenied, "Leaderboard only allows authoritative score submissions.")
} else if err != nil {
return nil, status.Error(codes.Internal, "Error writing score to leaderboard.")
}
return record, nil
}