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processor.go
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processor.go
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package resource
import (
"errors"
"reflect"
"github.com/jinzhu/gorm"
"github.com/qor/qor"
"github.com/qor/qor/roles"
)
var (
ErrProcessorRecordNotFound = errors.New("resource: record not found")
ErrProcessorSkipLeft = errors.New("resource: skip left")
)
type processor struct {
Result interface{}
Resource Resourcer
Context *qor.Context
MetaValues *MetaValues
SkipLeft bool
newRecord bool
}
func DecodeToResource(res Resourcer, result interface{}, metaValues *MetaValues, context *qor.Context) *processor {
scope := &gorm.Scope{Value: result}
return &processor{Resource: res, Result: result, Context: context, MetaValues: metaValues, newRecord: scope.PrimaryKeyZero()}
}
func (processor *processor) checkSkipLeft(errs ...error) bool {
if processor.SkipLeft {
return true
}
for _, err := range errs {
if err == ErrProcessorSkipLeft {
processor.SkipLeft = true
break
}
}
return processor.SkipLeft
}
func (processor *processor) Initialize() error {
err := processor.Resource.CallFindOne(processor.Result, processor.MetaValues, processor.Context)
processor.checkSkipLeft(err)
return err
}
func (processor *processor) Validate() (errors []error) {
if processor.checkSkipLeft() {
return
}
for _, fc := range processor.Resource.GetResource().validators {
if err := fc(processor.Result, processor.MetaValues, processor.Context); err != nil {
if processor.checkSkipLeft(err) {
break
}
errors = append(errors, err)
}
}
return
}
func (processor *processor) decode() (errors []error) {
if processor.checkSkipLeft() {
return
}
for _, metaValue := range processor.MetaValues.Values {
meta := metaValue.Meta
if meta == nil {
continue
}
if processor.newRecord && !meta.HasPermission(roles.Create, processor.Context) {
continue
} else if !meta.HasPermission(roles.Update, processor.Context) {
continue
}
if metaValue.MetaValues == nil {
if setter := meta.GetSetter(); setter != nil {
setter(processor.Result, metaValue, processor.Context)
}
continue
}
res := metaValue.Meta.GetResource()
if res == nil {
continue
}
field := reflect.Indirect(reflect.ValueOf(processor.Result)).FieldByName(meta.GetFieldName())
if field.Kind() == reflect.Struct {
association := field.Addr().Interface()
DecodeToResource(res, association, metaValue.MetaValues, processor.Context).Start()
} else if field.Kind() == reflect.Slice {
value := reflect.New(field.Type().Elem())
associationProcessor := DecodeToResource(res, value.Interface(), metaValue.MetaValues, processor.Context)
associationProcessor.Start()
if !associationProcessor.SkipLeft {
if !reflect.DeepEqual(reflect.Zero(field.Type().Elem()).Interface(), value.Elem().Interface()) {
field.Set(reflect.Append(field, value.Elem()))
}
}
}
processor.MetaValues.Errors = append(processor.MetaValues.Errors, metaValue.MetaValues.Errors...)
}
return
}
func (processor *processor) Commit() (errors []error) {
errors = processor.decode()
if processor.checkSkipLeft(errors...) {
return
}
for _, fc := range processor.Resource.GetResource().processors {
if err := fc(processor.Result, processor.MetaValues, processor.Context); err != nil {
if processor.checkSkipLeft(err) {
break
}
errors = append(errors, err)
}
}
return
}
func (processor *processor) Start() (errors []error) {
processor.Initialize()
if errors = append(errors, processor.Validate()...); len(errors) == 0 {
errors = append(errors, processor.Commit()...)
}
return
}