/
getResourceLinks.go
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/
getResourceLinks.go
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// ************************************************************************
// Copyright (C) 2022 plgd.dev, s.r.o.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ************************************************************************
package core
import (
"context"
"fmt"
"github.com/plgd-dev/device/v2/pkg/net/coap"
"github.com/plgd-dev/device/v2/schema"
"github.com/plgd-dev/device/v2/schema/resources"
"github.com/plgd-dev/go-coap/v3/message"
"github.com/plgd-dev/kit/v2/net"
)
func getResourceLinks(ctx context.Context, addr net.Addr, client *coap.ClientCloseHandler, deviceEndpoints schema.Endpoints, options ...coap.OptionFunc) (schema.ResourceLinks, error) {
options = append(options, coap.WithAccept(message.AppOcfCbor))
var links schema.ResourceLinks
var codec DiscoverDeviceCodec
err := client.GetResourceWithCodec(ctx, resources.ResourceURI, codec, &links, options...)
if err != nil {
return nil, err
}
return links.PatchEndpoint(addr, deviceEndpoints), nil
}
func (d *Device) GetResourceLinks(ctx context.Context, endpoints []schema.Endpoint, options ...coap.OptionFunc) (schema.ResourceLinks, error) {
addr, client, err := d.connectToEndpoints(ctx, endpoints)
if err != nil {
return nil, MakeDataLoss(fmt.Errorf("cannot get resource links for %v with endpoints %+v: %w", d.DeviceID(), endpoints, err))
}
links, err := getResourceLinks(ctx, addr, client, d.GetEndpoints(), options...)
if err != nil {
return links, MakeDataLoss(fmt.Errorf("cannot get resource links for %v: %w", d.DeviceID(), err))
}
return links, nil
}
func GetResourceLink(links schema.ResourceLinks, href string) (schema.ResourceLink, error) {
link, ok := links.GetResourceLink(href)
if !ok {
return link, MakeUnavailable(fmt.Errorf("resource \"%v\" not found", href))
}
return link, nil
}