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transforms.go
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transforms.go
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package transforms
import (
"fmt"
"github.com/anz-bank/sysl/pkg/eval"
sysl "github.com/anz-bank/sysl/pkg/sysl"
"github.com/anz-bank/sysl/pkg/syslutil"
)
type Worker interface {
Apply(mod *sysl.Module, appNames ...string) map[string]*sysl.Value
}
func NewWorker(transformMod *sysl.Module, appName, viewName string) (Worker, error) {
app, has := transformMod.Apps[appName]
if !has {
return nil, fmt.Errorf("app '%s' not found in transform module", appName)
}
view, has := app.Views[viewName]
if !has {
return nil, fmt.Errorf("view '%s' not found in transform app", viewName)
}
b := base{
mod: transformMod,
app: app,
view: view,
}
if len(view.Param) == 1 {
_, detail := syslutil.GetTypeDetail(view.Param[0].Type)
if detail == templateInputType {
return &templated{base: b}, nil
}
}
filenames, has := app.Views["filename"]
if !has {
return nil, fmt.Errorf("view '%s' not found in transform app", "filename")
}
return &semantic{base: b, filenames: filenames}, nil
}
type base struct {
mod *sysl.Module
app *sysl.Application
view *sysl.View
}
func (b *base) eval(view *sysl.View, scope eval.Scope) *sysl.Value {
if view.Expr.Type == nil {
view.Expr.Type = view.RetType
}
return eval.EvaluateApp(b.app, view, scope)
}