stash/pkg/javascript/vm.go

65 lines
1.1 KiB
Go

package javascript
import (
"fmt"
"net/http"
"os"
"github.com/dop251/goja"
)
type VM struct {
*goja.Runtime
Progress chan float64
SessionCookie *http.Cookie
GQLHandler http.Handler
}
func NewVM() *VM {
return &VM{Runtime: goja.New()}
}
type APIAdder interface {
AddToVM(globalName string, vm *VM) error
}
type ObjectValueDef struct {
Name string
Value interface{}
}
type setter interface {
Set(name string, value interface{}) error
}
func Compile(path string) (*goja.Program, error) {
js, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("failed to read file: %w", err)
}
return goja.Compile(path, string(js), true)
}
func CompileScript(name, script string) (*goja.Program, error) {
return goja.Compile(name, string(script), true)
}
func SetAll(s setter, defs ...ObjectValueDef) error {
for _, def := range defs {
if err := s.Set(def.Name, def.Value); err != nil {
return fmt.Errorf("failed to set %s: %w", def.Name, err)
}
}
return nil
}
func (v *VM) Throw(err error) {
e, newErr := v.New(v.Get("Error"), v.ToValue(err))
if newErr != nil {
panic(newErr)
}
panic(e)
}