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helper.go
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helper.go
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package method
import (
"strings"
longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
"go.einride.tech/aip/reflect/aipreflect"
"go.einride.tech/aip/resourcename"
"google.golang.org/genproto/googleapis/api/annotations"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/reflect/protoreflect"
)
func getResourceDescriptor(message protoreflect.MessageDescriptor) *annotations.ResourceDescriptor {
return proto.GetExtension(
message.Options(),
annotations.E_Resource,
).(*annotations.ResourceDescriptor)
}
func getResourceReference(field protoreflect.FieldDescriptor) *annotations.ResourceReference {
return proto.GetExtension(
field.Options(),
annotations.E_ResourceReference,
).(*annotations.ResourceReference)
}
func hasNamePrefix(method protoreflect.Descriptor, methodType aipreflect.MethodType) bool {
return strings.HasPrefix(string(method.Name()), methodType.String())
}
func findMessage(file protoreflect.FileDescriptor, name string) protoreflect.MessageDescriptor {
var message protoreflect.MessageDescriptor
rangeReachableMessages(file, func(m protoreflect.MessageDescriptor) bool {
if string(m.FullName()) == name || string(m.Name()) == name {
message = m
return false
}
return true
})
return message
}
func getLROInfo(method protoreflect.MethodDescriptor) *longrunningpb.OperationInfo {
return proto.GetExtension(
method.Options(),
longrunningpb.E_OperationInfo,
).(*longrunningpb.OperationInfo)
}
func rangeReachableMessages(file protoreflect.FileDescriptor, fn func(message protoreflect.MessageDescriptor) bool) {
if !rangeFileMessages(file, fn) {
return
}
for i := 0; i < file.Imports().Len(); i++ {
if !rangeFileMessages(file.Imports().Get(i).FileDescriptor, fn) {
return
}
}
}
func rangeFileMessages(file protoreflect.FileDescriptor, fn func(message protoreflect.MessageDescriptor) bool) bool {
for i := 0; i < file.Messages().Len(); i++ {
message := file.Messages().Get(i)
if !fn(message) {
return false
}
if !rangeMessageMessages(message, fn) {
return false
}
}
return true
}
func rangeMessageMessages(
message protoreflect.MessageDescriptor,
fn func(message protoreflect.MessageDescriptor) bool,
) bool {
for i := 0; i < message.Messages().Len(); i++ {
nested := message.Messages().Get(i)
if !fn(nested) {
return false
}
if !rangeMessageMessages(nested, fn) {
return false
}
}
return true
}
func findResourceField(
message protoreflect.MessageDescriptor,
resource *annotations.ResourceDescriptor,
) protoreflect.FieldDescriptor {
for i := 0; i < message.Fields().Len(); i++ {
field := message.Fields().Get(i)
if field.Kind() == protoreflect.MessageKind {
r := getResourceDescriptor(field.Message())
if r != nil && r.GetType() == resource.GetType() {
return field
}
}
}
return nil
}
func firstFieldResource(
message protoreflect.MessageDescriptor,
) (protoreflect.FieldDescriptor, *annotations.ResourceDescriptor, bool) {
for i := 0; i < message.Fields().Len(); i++ {
field := message.Fields().Get(i)
if field.Kind() == protoreflect.MessageKind {
r := getResourceDescriptor(field.Message())
if r != nil {
return field, r, true
}
}
}
return nil, nil, false
}
func hasField(message protoreflect.MessageDescriptor, name string) bool {
return message.Fields().ByName(protoreflect.Name(name)) != nil
}
func findResourceDescriptor(typ string, scope protoreflect.Descriptor) *annotations.ResourceDescriptor {
var resourceDescriptor *annotations.ResourceDescriptor
rangeReachableFiles(scope, func(file protoreflect.FileDescriptor) bool {
if resourceDescriptor != nil {
return false
}
aipreflect.RangeResourceDescriptorsInFile(file, func(resource *annotations.ResourceDescriptor) bool {
if resource.GetType() == typ {
resourceDescriptor = resource
return false
}
return true
})
return true
})
return resourceDescriptor
}
func rangeReachableFiles(desc protoreflect.Descriptor, fn func(file protoreflect.FileDescriptor) bool) {
if !fn(desc.ParentFile()) {
return
}
for i := 0; i < desc.ParentFile().Imports().Len(); i++ {
if !fn(desc.ParentFile().Imports().Get(i).FileDescriptor) {
return
}
}
}
func isTopLevelResource(r *annotations.ResourceDescriptor) bool {
return len(resourceNameSegments(r.GetPattern()[0])) <= 3
}
func resourceNameSegments(pattern string) []resourcename.Segment {
var s resourcename.Scanner
s.Init(pattern)
segments := make([]resourcename.Segment, 0)
for s.Scan() {
segments = append(segments, s.Segment())
}
return segments
}