consul/internal/controller/dependency/higher_order.go

48 lines
1.5 KiB
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package dependency
import (
"context"
"github.com/hashicorp/consul/internal/controller"
"github.com/hashicorp/consul/internal/resource"
"github.com/hashicorp/consul/proto-public/pbresource"
)
// WrapAndReplaceType will invoke the provided dependency mapper and then replace
// the type of all generated requests with the desired type.
func WrapAndReplaceType(desiredType *pbresource.Type, mapper controller.DependencyMapper) controller.DependencyMapper {
return func(ctx context.Context, rt controller.Runtime, res *pbresource.Resource) ([]controller.Request, error) {
reqs, err := mapper(ctx, rt, res)
if err != nil {
return nil, err
}
for idx, req := range reqs {
req.ID = resource.ReplaceType(desiredType, req.ID)
reqs[idx] = req
}
return reqs, nil
}
}
// MultiMapper can be used to concatenate the results of multiple dependency mappers. This
// helps to allow composition of different relationships without having to implement larger
// functions to perform all the various mappings. The goal here being to enable more reusuable
// dependency mappers.
func MultiMapper(mappers ...controller.DependencyMapper) controller.DependencyMapper {
return func(ctx context.Context, rt controller.Runtime, res *pbresource.Resource) ([]controller.Request, error) {
var results []controller.Request
for _, mapper := range mappers {
reqs, err := mapper(ctx, rt, res)
if err != nil {
return nil, err
}
results = append(results, reqs...)
}
return results, nil
}
}