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agent_service.go
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/
agent_service.go
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// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0
// Adapted for Orb project, modifications licensed under MPL v. 2.0:
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
package fleet
import (
"context"
"github.com/mainflux/mainflux"
mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
"github.com/ns1labs/orb/fleet/backend"
"github.com/ns1labs/orb/pkg/errors"
"go.uber.org/zap"
)
var (
ErrCreateAgent = errors.New("failed to create agent")
// ErrThings indicates failure to communicate with Mainflux Things service.
// It can be due to networking error or invalid/unauthorized request.
ErrThings = errors.New("failed to receive response from Things service")
errCreateThing = errors.New("failed to create thing")
errThingNotFound = errors.New("thing not found")
)
func (svc fleetService) addAgentToAgentGroupChannels(token string, a Agent) error {
// first we get the agent group to connect the new agent to the correct group channel
groupList, err := svc.agentGroupRepository.RetrieveAllByAgent(context.Background(), a)
if err != nil {
return err
}
if len(groupList) == 0 {
return nil
}
var idList = make([]string, 1)
idList[0] = a.MFThingID
for _, group := range groupList {
ids := mfsdk.ConnectionIDs{
ChannelIDs: []string{group.MFChannelID},
ThingIDs: idList,
}
err = svc.mfsdk.Connect(ids, token)
if err != nil {
return err
}
}
return nil
}
func (svc fleetService) ViewAgentByID(ctx context.Context, token string, thingID string) (Agent, error) {
ownerID, err := svc.identify(token)
if err != nil {
return Agent{}, err
}
return svc.agentRepo.RetrieveByID(ctx, ownerID, thingID)
}
func (svc fleetService) ViewAgentByIDInternal(ctx context.Context, ownerID string, id string) (Agent, error) {
return svc.agentRepo.RetrieveByID(ctx, ownerID, id)
}
func (svc fleetService) ListAgents(ctx context.Context, token string, pm PageMetadata) (Page, error) {
res, err := svc.auth.Identify(ctx, &mainflux.Token{Value: token})
if err != nil {
return Page{}, errors.Wrap(errors.ErrUnauthorizedAccess, err)
}
return svc.agentRepo.RetrieveAll(ctx, res.GetId(), pm)
}
func (svc fleetService) CreateAgent(ctx context.Context, token string, a Agent) (Agent, error) {
mfOwnerID, err := svc.identify(token)
if err != nil {
return Agent{}, err
}
a.MFOwnerID = mfOwnerID
md := map[string]interface{}{"type": "orb_agent"}
// create new Thing
mfThing, err := svc.thing(token, "", a.Name.String(), md)
if err != nil {
return Agent{}, errors.Wrap(ErrCreateAgent, err)
}
a.MFThingID = mfThing.ID
a.MFKeyID = mfThing.Key
// create main Agent RPC Channel
mfChannelID, err := svc.mfsdk.CreateChannel(mfsdk.Channel{
Name: a.Name.String(),
Metadata: md,
}, token)
if err != nil {
if errT := svc.mfsdk.DeleteThing(mfThing.ID, token); errT != nil {
err = errors.Wrap(err, errT)
}
return Agent{}, errors.Wrap(ErrCreateAgent, err)
}
a.MFChannelID = mfChannelID
// RPC Channel to Agent
err = svc.mfsdk.Connect(mfsdk.ConnectionIDs{
ChannelIDs: []string{mfChannelID},
ThingIDs: []string{mfThing.ID},
}, token)
if err != nil {
if errT := svc.mfsdk.DeleteThing(mfThing.ID, token); errT != nil {
err = errors.Wrap(err, errT)
// fall through
}
if errT := svc.mfsdk.DeleteChannel(mfChannelID, token); errT != nil {
err = errors.Wrap(err, errT)
}
return Agent{}, errors.Wrap(ErrCreateAgent, err)
}
err = svc.agentRepo.Save(ctx, a)
if err != nil {
if errT := svc.mfsdk.DeleteThing(mfThing.ID, token); errT != nil {
err = errors.Wrap(err, errT)
// fall through
}
if errT := svc.mfsdk.DeleteChannel(mfChannelID, token); errT != nil {
err = errors.Wrap(err, errT)
}
return Agent{}, errors.Wrap(ErrCreateAgent, err)
}
err = svc.addAgentToAgentGroupChannels(token, a)
if err != nil {
// TODO should we roll back?
svc.logger.Error("failed to add agent to a existing group channel", zap.String("agent_id", a.MFThingID), zap.Error(err))
}
return a, nil
}
func (svc fleetService) EditAgent(ctx context.Context, token string, agent Agent) (Agent, error) {
ownerID, err := svc.identify(token)
if err != nil {
return Agent{}, err
}
agent.MFOwnerID = ownerID
err = svc.agentRepo.UpdateAgentByID(ctx, ownerID, agent)
if err != nil {
return Agent{}, err
}
res, err := svc.agentRepo.RetrieveByID(ctx, ownerID, agent.MFThingID)
if err != nil {
return Agent{}, err
}
err = svc.agentComms.NotifyAgentGroupMemberships(res)
if err != nil {
svc.logger.Error("failure during agent group membership comms", zap.Error(err))
}
return res, nil
}
func (svc fleetService) ValidateAgent(ctx context.Context, token string, a Agent) (Agent, error) {
mfOwnerID, err := svc.identify(token)
if err != nil {
return Agent{}, err
}
a.MFOwnerID = mfOwnerID
return a, nil
}
func (svc fleetService) RemoveAgent(ctx context.Context, token, thingID string) error {
ownerID, err := svc.identify(token)
if err != nil {
return err
}
res, err := svc.agentRepo.RetrieveByID(ctx, ownerID, thingID)
if err != nil {
return nil
}
if errT := svc.mfsdk.DeleteThing(res.MFThingID, token); errT != nil {
svc.logger.Error("failed to delete thing", zap.Error(errT), zap.String("thing_id", res.MFThingID))
}
if errT := svc.mfsdk.DeleteChannel(res.MFChannelID, token); errT != nil {
svc.logger.Error("failed to delete channel", zap.Error(errT), zap.String("channel_id", res.MFChannelID))
}
err = svc.agentRepo.Delete(ctx, ownerID, thingID)
if err != nil {
return err
}
return nil
}
func (svc fleetService) ListAgentBackends(ctx context.Context, token string) ([]string, error) {
_, err := svc.identify(token)
if err != nil {
return nil, err
}
return backend.GetList(), nil
}
func (svc fleetService) ViewAgentBackend(ctx context.Context, token string, name string) (interface{}, error) {
_, err := svc.identify(token)
if err != nil {
return nil, err
}
if backend.HaveBackend(name) {
return backend.GetBackend(name).Metadata(), nil
}
return nil, errors.ErrNotFound
}
func (svc fleetService) ViewOwnerByChannelIDInternal(ctx context.Context, channelID string) (Agent, error) {
res, err := svc.agentRepo.RetrieveOwnerByChannelID(ctx, channelID)
if err != nil {
return Agent{}, err
}
return res, nil
}