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transform.go
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transform.go
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package importer
import (
"os"
"path"
"strings"
"github.com/anz-bank/sysl/internal/bundles"
"github.com/anz-bank/sysl/pkg/arrai/transform"
"github.com/arr-ai/arrai/rel"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
func MakeTransformImporter(logger *logrus.Logger, transformName string) *TransformImporter {
return &TransformImporter{
transformName: transformName,
logger: logger,
}
}
// TransformImporter enables importing from various formats by running embedded arr.ai transform scripts that convert
// data into Sysl.
type TransformImporter struct {
appName string
logger *logrus.Logger
transformName string
}
// Configure allows the imported Sysl application name, package and import directories to be specified.
func (i *TransformImporter) Configure(arg *ImporterArg) (Importer, error) {
if arg.AppName == "" {
return nil, errors.New("application name not provided")
}
i.appName = arg.AppName
return i, nil
}
// LoadFile generates a Sysl spec by invoking the arr.ai transform.
func (i *TransformImporter) LoadFile(path string) (string, error) {
bs, err := os.ReadFile(path)
if err != nil {
return "", err
}
return i.Load(string(bs))
}
// Load generates a Sysl spec given the content of an input file.
func (i *TransformImporter) Load(content string) (string, error) {
input, err := rel.NewValue(map[string]interface{}{
"appName": i.appName,
"content": content,
})
if err != nil {
return "", err
}
scriptPath := path.Join("importers", strings.ToLower(i.transformName), "transform.arraiz")
result, err := transform.EvalWithParam(bundles.MustRead(scriptPath), scriptPath, input)
if result != nil {
return result.String(), err
}
return "", err
}