first commit

internal/cache/redis.go

@@ -0,0 +1,60 @@
+package cache
+
+import (
+	"context"
+	"crypto/sha1"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+
+	"secunda-test/internal/domain"
+)
+
+type TaskCache struct {
+	client *redis.Client
+	ttl    time.Duration
+}
+
+func NewTaskCache(client *redis.Client, ttl time.Duration) *TaskCache {
+	return &TaskCache{client: client, ttl: ttl}
+}
+
+func (c *TaskCache) GetTasks(ctx context.Context, filter domain.TaskFilter) ([]domain.Task, bool, error) {
+	data, err := c.client.Get(ctx, c.key(filter)).Bytes()
+	if err == redis.Nil {
+		return nil, false, nil
+	}
+	if err != nil {
+		return nil, false, err
+	}
+	var tasks []domain.Task
+	if err := json.Unmarshal(data, &tasks); err != nil {
+		return nil, false, err
+	}
+	return tasks, true, nil
+}
+
+func (c *TaskCache) SetTasks(ctx context.Context, filter domain.TaskFilter, tasks []domain.Task) error {
+	data, err := json.Marshal(tasks)
+	if err != nil {
+		return err
+	}
+	return c.client.Set(ctx, c.key(filter), data, c.ttl).Err()
+}
+
+func (c *TaskCache) DeleteTeam(ctx context.Context, teamID int64) error {
+	iter := c.client.Scan(ctx, 0, fmt.Sprintf("tasks:team:%d:*", teamID), 100).Iterator()
+	for iter.Next(ctx) {
+		_ = c.client.Del(ctx, iter.Val()).Err()
+	}
+	return iter.Err()
+}
+
+func (c *TaskCache) key(filter domain.TaskFilter) string {
+	raw, _ := json.Marshal(filter)
+	sum := sha1.Sum(raw)
+	return fmt.Sprintf("tasks:team:%d:%s", filter.TeamID, hex.EncodeToString(sum[:]))
+}