feat: add llm.txt

backend/app/tenancy/tenancy.go

@@ -1,71 +0,0 @@
-package tenancy
-
-import (
-	"database/sql"
-	"regexp"
-	"strings"
-
-	"quyun/v2/app/errorx"
-
-	"github.com/gofiber/fiber/v3"
-	"github.com/google/uuid"
-)
-
-const (
-	LocalTenantCode = "tenant_code"
-	LocalTenantID   = "tenant_id"
-	LocalTenantUUID = "tenant_uuid"
-)
-
-var tenantCodeRe = regexp.MustCompile(`^[a-z0-9_-]+$`)
-
-type Tenant struct {
-	ID   int64
-	Code string
-	UUID uuid.UUID
-}
-
-func ResolveTenant(c fiber.Ctx, db *sql.DB) (*Tenant, error) {
-	raw := strings.TrimSpace(c.Params("tenant_code"))
-	code := strings.ToLower(raw)
-	if code == "" || !tenantCodeRe.MatchString(code) {
-		return nil, errorx.ErrInvalidParameter.WithMsg("invalid tenant_code")
-	}
-
-	var (
-		id         int64
-		tenantUUID uuid.UUID
-		status     int16
-	)
-	err := db.QueryRowContext(
-		c.Context(),
-		`SELECT id, tenant_uuid, status FROM tenants WHERE lower(tenant_code) = $1 LIMIT 1`,
-		code,
-	).Scan(&id, &tenantUUID, &status)
-	if err != nil {
-		if err == sql.ErrNoRows {
-			return nil, fiber.ErrNotFound
-		}
-		return nil, errorx.ErrDatabaseError.WithMsg("database error").WithParams(err.Error())
-	}
-
-	// status: 0 enabled (by default)
-	if status != 0 {
-		return nil, fiber.ErrNotFound
-	}
-
-	return &Tenant{ID: id, Code: code, UUID: tenantUUID}, nil
-}
-
-func Middleware(db *sql.DB) fiber.Handler {
-	return func(c fiber.Ctx) error {
-		tenant, err := ResolveTenant(c, db)
-		if err != nil {
-			return err
-		}
-		c.Locals(LocalTenantCode, tenant.Code)
-		c.Locals(LocalTenantID, tenant.ID)
-		c.Locals(LocalTenantUUID, tenant.UUID.String())
-		return c.Next()
-	}
-}