chore: import upstream snapshot with attribution

internal/repo/limit/limit.go

@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 limit
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/apache/answer/internal/base/constant"
+	"github.com/apache/answer/internal/base/data"
+	"github.com/apache/answer/internal/base/reason"
+	"github.com/segmentfault/pacman/errors"
+)
+
+// LimitRepo auth repository
+type LimitRepo struct {
+	data *data.Data
+}
+
+// NewRateLimitRepo new repository
+func NewRateLimitRepo(data *data.Data) *LimitRepo {
+	return &LimitRepo{
+		data: data,
+	}
+}
+
+// CheckAndRecord check
+func (lr *LimitRepo) CheckAndRecord(ctx context.Context, key string) (limit bool, err error) {
+	_, exist, err := lr.data.Cache.GetString(ctx, constant.RateLimitCacheKeyPrefix+key)
+	if err != nil {
+		return false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	if exist {
+		return true, nil
+	}
+	err = lr.data.Cache.SetString(ctx, constant.RateLimitCacheKeyPrefix+key,
+		fmt.Sprintf("%d", time.Now().Unix()), constant.RateLimitCacheTime)
+	if err != nil {
+		return false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return false, nil
+}
+
+// ClearRecord clear
+func (lr *LimitRepo) ClearRecord(ctx context.Context, key string) error {
+	return lr.data.Cache.Del(ctx, constant.RateLimitCacheKeyPrefix+key)
+}