root
85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
package service
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"strings"
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"time"
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"github.com/redis/go-redis/v9"
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)
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// SummaryCache 封装 summary 接口的 Redis 缓存。
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type SummaryCache struct {
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rc *redis.Client
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keyPrefix string
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ttl time.Duration
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}
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func NewSummaryCache(rc *redis.Client, keyPrefix string, ttl time.Duration) *SummaryCache {
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if ttl <= 0 {
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ttl = 5 * time.Minute
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}
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return &SummaryCache{
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rc: rc,
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keyPrefix: keyPrefix,
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ttl: ttl,
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}
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}
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func (c *SummaryCache) Get(ctx context.Context, userID uint) (*SummaryResponse, bool, error) {
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if c == nil || c.rc == nil || userID == 0 {
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return nil, false, nil
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}
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val, err := c.rc.Get(ctx, c.summaryKey(userID)).Bytes()
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if err != nil {
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if errors.Is(err, redis.Nil) {
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return nil, false, nil
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}
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return nil, false, fmt.Errorf("redis get summary: %w", err)
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}
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var summary SummaryResponse
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if err := json.Unmarshal(val, &summary); err != nil {
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_ = c.rc.Del(ctx, c.summaryKey(userID)).Err()
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return nil, false, nil
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}
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return &summary, true, nil
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}
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func (c *SummaryCache) Set(ctx context.Context, userID uint, summary *SummaryResponse) error {
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if c == nil || c.rc == nil || userID == 0 || summary == nil {
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return nil
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}
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body, err := json.Marshal(summary)
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if err != nil {
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return fmt.Errorf("marshal summary: %w", err)
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}
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if err := c.rc.Set(ctx, c.summaryKey(userID), body, c.ttl).Err(); err != nil {
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return fmt.Errorf("redis set summary: %w", err)
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}
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return nil
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}
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func (c *SummaryCache) Delete(ctx context.Context, userID uint) error {
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if c == nil || c.rc == nil || userID == 0 {
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return nil
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}
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if err := c.rc.Del(ctx, c.summaryKey(userID)).Err(); err != nil {
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return fmt.Errorf("redis del summary: %w", err)
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}
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return nil
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}
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func (c *SummaryCache) summaryKey(userID uint) string {
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prefix := c.keyPrefix
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if prefix != "" && !strings.HasSuffix(prefix, ":") {
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prefix += ":"
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}
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return fmt.Sprintf("%sexpiry_summary:%d", prefix, userID)
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}
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