feat: add activity table (#888)

feat: introduce activity

store/activity.go

@@ -0,0 +1,84 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/usememos/memos/api"
+)
+
+// activityRaw is the store model for an Activity.
+// Fields have exactly the same meanings as Activity.
+type activityRaw struct {
+	ID int
+
+	// Standard fields
+	CreatorID int
+	CreatedTs int64
+
+	// Domain specific fields
+	Type    api.ActivityType
+	Level   api.ActivityLevel
+	Payload string
+}
+
+// toActivity creates an instance of Activity based on the ActivityRaw.
+func (raw *activityRaw) toActivity() *api.Activity {
+	return &api.Activity{
+		ID: raw.ID,
+
+		CreatorID: raw.CreatorID,
+		CreatedTs: raw.CreatedTs,
+
+		Type:    raw.Type,
+		Level:   raw.Level,
+		Payload: raw.Payload,
+	}
+}
+
+// CreateActivity creates an instance of Activity.
+func (s *Store) CreateActivity(ctx context.Context, create *api.ActivityCreate) (*api.Activity, error) {
+	tx, err := s.db.BeginTx(ctx, nil)
+	if err != nil {
+		return nil, FormatError(err)
+	}
+	defer tx.Rollback()
+
+	activityRaw, err := createActivity(ctx, tx, create)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := tx.Commit(); err != nil {
+		return nil, FormatError(err)
+	}
+
+	return activityRaw.toActivity(), nil
+}
+
+// createActivity creates a new activity.
+func createActivity(ctx context.Context, tx *sql.Tx, create *api.ActivityCreate) (*activityRaw, error) {
+	query := `
+		INSERT INTO activity (
+			creator_id, 
+			type, 
+			level, 
+			payload
+		)
+		VALUES (?, ?, ?, ?)
+		RETURNING id, type, level, payload, creator_id, created_ts
+	`
+	var activityRaw activityRaw
+	if err := tx.QueryRowContext(ctx, query, create.CreatorID, create.Type, create.Level, create.Payload).Scan(
+		&activityRaw.ID,
+		&activityRaw.Type,
+		&activityRaw.Level,
+		&activityRaw.Payload,
+		&activityRaw.CreatedTs,
+		&activityRaw.CreatedTs,
+	); err != nil {
+		return nil, FormatError(err)
+	}
+
+	return &activityRaw, nil
+}