mirror of
https://github.com/Rain-kl/OpenFlare.git
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ryan
99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
/*
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Copyright 2025 linux.do
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package leaderboard
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/linux-do/credit/internal/db"
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"github.com/linux-do/credit/internal/model"
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)
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func getList(ctx context.Context, req *ListRequest) (*ListResponse, error) {
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// 检查 Redis 缓存
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cacheKey := fmt.Sprintf("%slist:p:%d:s:%d", cacheKeyPrefix, req.Page, req.PageSize)
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if data, err := db.Redis.Get(ctx, db.PrefixedKey(cacheKey)).Bytes(); err == nil {
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var cached ListResponse
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if err := json.Unmarshal(data, &cached); err == nil {
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return &cached, nil
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}
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}
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// 2. 查询数据库
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items, total, err := queryLeaderboard(ctx, req)
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if err != nil {
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return nil, err
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}
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response := &ListResponse{
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SortBy: "available_balance",
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Order: "desc",
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Page: req.Page,
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PageSize: req.PageSize,
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Total: total,
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Items: items,
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}
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if data, err := json.Marshal(response); err == nil {
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_ = db.Redis.Set(ctx, db.PrefixedKey(cacheKey), data, getCacheTTL(ctx)).Err()
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}
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return response, nil
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}
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func getUserRank(ctx context.Context, userID uint64) (*UserRankResponse, error) {
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// 检查缓存
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cacheKey := fmt.Sprintf("%suser:%d", cacheKeyPrefix, userID)
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if data, err := db.Redis.Get(ctx, db.PrefixedKey(cacheKey)).Bytes(); err == nil {
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var cached UserRankResponse
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if err := json.Unmarshal(data, &cached); err == nil {
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return &cached, nil
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}
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}
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// 查询用户余额
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var user model.User
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if err := db.DB(ctx).Select("id, available_balance").Where("id = ? AND is_active = ?", userID, true).First(&user).Error; err != nil {
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return nil, err
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}
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// 计算排名：统计比当前用户排位更高的人数
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// 排序规则：available_balance DESC, id ASC
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// 即：余额更高，或余额相同但 id 更小
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var rank int64
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if err := db.DB(ctx).Model(&model.User{}).
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Where("is_active = ? AND ((available_balance > ?) OR (available_balance = ? AND id < ?))",
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true, user.AvailableBalance, user.AvailableBalance, userID).
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Count(&rank).Error; err != nil {
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return nil, err
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}
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response := &UserRankResponse{
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User: UserRankInfo{
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UserID: userID,
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Rank: int(rank + 1),
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AvailableBalance: user.AvailableBalance,
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},
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}
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if data, err := json.Marshal(response); err == nil {
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_ = db.Redis.Set(ctx, db.PrefixedKey(cacheKey), data, getCacheTTL(ctx)).Err()
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}
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return response, nil
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}
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