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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| package provider | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "reflect" | ||
|
|
||
| "github.com/evcc-io/evcc/provider/golang" | ||
| "github.com/evcc-io/evcc/util" | ||
| "github.com/traefik/yaegi/interp" | ||
| ) | ||
|
|
||
| // Go implements Go request provider | ||
| type Go struct { | ||
| vm *interp.Interpreter | ||
| script string | ||
| } | ||
|
|
||
| func init() { | ||
| registry.Add("go", NewGoProviderFromConfig) | ||
| } | ||
|
|
||
| // NewGoProviderFromConfig creates a Go provider | ||
| func NewGoProviderFromConfig(other map[string]interface{}) (IntProvider, error) { | ||
| var cc struct { | ||
| VM string | ||
| Script string | ||
| } | ||
|
|
||
| if err := util.DecodeOther(other, &cc); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| vm, err := golang.RegisteredVM(cc.VM, "") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| p := &Go{ | ||
| vm: vm, | ||
| script: cc.Script, | ||
| } | ||
|
|
||
| return p, nil | ||
| } | ||
|
|
||
| // FloatGetter parses float from request | ||
| func (p *Go) FloatGetter() func() (float64, error) { | ||
| return func() (res float64, err error) { | ||
| v, err := p.vm.Eval(p.script) | ||
| if err == nil { | ||
| if typ := reflect.TypeOf(res); v.CanConvert(typ) { | ||
| res = v.Convert(typ).Float() | ||
| } else { | ||
| err = fmt.Errorf("not a float: %v", v) | ||
| } | ||
| } | ||
|
|
||
| return res, err | ||
| } | ||
| } | ||
|
|
||
| // IntGetter parses int64 from request | ||
| func (p *Go) IntGetter() func() (int64, error) { | ||
| return func() (res int64, err error) { | ||
| v, err := p.vm.Eval(p.script) | ||
| if err == nil { | ||
| if typ := reflect.TypeOf(res); v.CanConvert(typ) { | ||
| res = v.Convert(typ).Int() | ||
| } else { | ||
| err = fmt.Errorf("not an int: %v", v) | ||
| } | ||
| } | ||
|
|
||
| return res, err | ||
| } | ||
| } | ||
|
|
||
| // StringGetter parses string from request | ||
| func (p *Go) StringGetter() func() (string, error) { | ||
| return func() (res string, err error) { | ||
| v, err := p.vm.Eval(p.script) | ||
| if err == nil { | ||
| if typ := reflect.TypeOf(res); v.CanConvert(typ) { | ||
| res = v.Convert(typ).String() | ||
| } else { | ||
| err = fmt.Errorf("not a string: %v", v) | ||
| } | ||
| } | ||
|
|
||
| return res, err | ||
| } | ||
| } | ||
|
|
||
| // BoolGetter parses bool from request | ||
| func (p *Go) BoolGetter() func() (bool, error) { | ||
| return func() (res bool, err error) { | ||
| v, err := p.vm.Eval(p.script) | ||
| if err == nil { | ||
| if typ := reflect.TypeOf(res); v.CanConvert(typ) { | ||
| res = v.Convert(typ).Bool() | ||
| } else { | ||
| err = fmt.Errorf("not a boolean: %v", v) | ||
| } | ||
| } | ||
|
|
||
| return res, err | ||
| } | ||
| } | ||
|
|
||
| func (p *Go) paramAndEval(param string, val any) error { | ||
| _, err := p.vm.Eval(fmt.Sprintf("%s := %v;", param, val)) | ||
| if err == nil { | ||
| _, err = p.vm.Eval(p.script) | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| func (p *Go) IntSetter(param string) func(int64) error { | ||
| return func(val int64) error { | ||
| return p.paramAndEval(param, val) | ||
| } | ||
| } | ||
|
|
||
| // StringSetter sends string request | ||
| func (p *Go) StringSetter(param string) func(string) error { | ||
| return func(val string) error { | ||
| return p.paramAndEval(param, val) | ||
| } | ||
| } | ||
|
|
||
| // BoolSetter sends bool request | ||
| func (p *Go) BoolSetter(param string) func(bool) error { | ||
| return func(val bool) error { | ||
| return p.paramAndEval(param, val) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package golang | ||
|
|
||
| import ( | ||
| "github.com/traefik/yaegi/interp" | ||
| "github.com/traefik/yaegi/stdlib" | ||
| "strings" | ||
| "sync" | ||
| ) | ||
|
|
||
| var ( | ||
| mu sync.Mutex | ||
| registry = make(map[string]*interp.Interpreter) | ||
| ) | ||
|
|
||
| // RegisteredVM returns a JS VM. If name is not empty, it will return a shared instance. | ||
| func RegisteredVM(name, init string) (*interp.Interpreter, error) { | ||
| mu.Lock() | ||
| defer mu.Unlock() | ||
|
|
||
| name = strings.ToLower(name) | ||
| vm, ok := registry[name] | ||
|
|
||
| // create new VM | ||
| if !ok { | ||
| vm = interp.New(interp.Options{}) | ||
|
|
||
| if err := vm.Use(stdlib.Symbols); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if init != "" { | ||
| if _, err := vm.Eval(init); err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| if name != "" { | ||
| registry[name] = vm | ||
| } | ||
| } | ||
|
|
||
| return vm, nil | ||
| } |