emissary/internal/server/agent_api.go

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2023-02-02 10:55:24 +01:00
package server
import (
"net/http"
"strconv"
"strings"
"forge.cadoles.com/Cadoles/emissary/internal/datastore"
"github.com/go-chi/chi"
"github.com/pkg/errors"
"gitlab.com/wpetit/goweb/api"
"gitlab.com/wpetit/goweb/logger"
)
const (
ErrCodeUnknownError api.ErrorCode = "unknown-error"
ErrCodeNotFound api.ErrorCode = "not-found"
ErrCodeAlreadyRegistered api.ErrorCode = "already-registered"
)
type registerAgentRequest struct {
RemoteID string `json:"remoteId"`
}
func (s *Server) registerAgent(w http.ResponseWriter, r *http.Request) {
registerAgentReq := &registerAgentRequest{}
if ok := api.Bind(w, r, registerAgentReq); !ok {
return
}
ctx := r.Context()
agent, err := s.agentRepo.Create(
ctx,
registerAgentReq.RemoteID,
datastore.AgentStatusPending,
)
if err != nil {
if errors.Is(err, datastore.ErrAlreadyExist) {
logger.Error(ctx, "agent already registered", logger.F("remoteID", registerAgentReq.RemoteID))
api.ErrorResponse(w, http.StatusConflict, ErrCodeAlreadyRegistered, nil)
return
}
logger.Error(ctx, "could not create agent", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
return
}
api.DataResponse(w, http.StatusCreated, struct {
Agent *datastore.Agent `json:"agent"`
}{
Agent: agent,
})
}
type updateAgentRequest struct {
Status *datastore.AgentStatus `json:"status"`
}
func (s *Server) updateAgent(w http.ResponseWriter, r *http.Request) {
agentID, ok := getAgentID(w, r)
if !ok {
return
}
ctx := r.Context()
updateAgentReq := &updateAgentRequest{}
if ok := api.Bind(w, r, updateAgentReq); !ok {
return
}
options := make([]datastore.AgentUpdateOptionFunc, 0)
if updateAgentReq.Status != nil {
options = append(options, datastore.WithAgentUpdateStatus(*updateAgentReq.Status))
}
agent, err := s.agentRepo.Update(
ctx,
datastore.AgentID(agentID),
options...,
)
if err != nil {
logger.Error(ctx, "could not update agent", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
return
}
api.DataResponse(w, http.StatusOK, struct {
Agent *datastore.Agent `json:"agent"`
}{
Agent: agent,
})
}
func (s *Server) queryAgents(w http.ResponseWriter, r *http.Request) {
limit, ok := getIntQueryParam(w, r, "limit", 10)
if !ok {
return
}
offset, ok := getIntQueryParam(w, r, "offset", 0)
if !ok {
return
}
options := []datastore.AgentQueryOptionFunc{
datastore.WithAgentQueryLimit(int(limit)),
datastore.WithAgentQueryOffset(int(offset)),
}
ids, ok := getIntSliceValues(w, r, "ids", nil)
if !ok {
return
}
if ids != nil {
agentIDs := func(ids []int64) []datastore.AgentID {
agentIDs := make([]datastore.AgentID, 0, len(ids))
for _, id := range ids {
agentIDs = append(agentIDs, datastore.AgentID(id))
}
return agentIDs
}(ids)
options = append(options, datastore.WithAgentQueryID(agentIDs...))
}
remoteIDs, ok := getStringSliceValues(w, r, "remoteIds", nil)
if !ok {
return
}
if remoteIDs != nil {
options = append(options, datastore.WithAgentQueryRemoteID(remoteIDs...))
}
statuses, ok := getIntSliceValues(w, r, "statuses", nil)
if !ok {
return
}
if statuses != nil {
agentStatuses := func(statuses []int64) []datastore.AgentStatus {
agentStatuses := make([]datastore.AgentStatus, 0, len(statuses))
for _, status := range statuses {
agentStatuses = append(agentStatuses, datastore.AgentStatus(status))
}
return agentStatuses
}(statuses)
options = append(options, datastore.WithAgentQueryStatus(agentStatuses...))
}
ctx := r.Context()
agents, total, err := s.agentRepo.Query(
ctx,
options...,
)
if err != nil {
logger.Error(ctx, "could not list agents", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
return
}
api.DataResponse(w, http.StatusOK, struct {
Agents []*datastore.Agent `json:"agents"`
Total int `json:"total"`
}{
Agents: agents,
Total: total,
})
}
func (s *Server) deleteAgent(w http.ResponseWriter, r *http.Request) {
agentID, ok := getAgentID(w, r)
if !ok {
return
}
ctx := r.Context()
err := s.agentRepo.Delete(
ctx,
datastore.AgentID(agentID),
)
if err != nil {
if errors.Is(err, datastore.ErrNotFound) {
api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
return
}
logger.Error(ctx, "could not delete agent", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
return
}
api.DataResponse(w, http.StatusOK, struct {
AgentID datastore.AgentID `json:"agentId"`
}{
AgentID: datastore.AgentID(agentID),
})
}
func (s *Server) getAgent(w http.ResponseWriter, r *http.Request) {
agentID, ok := getAgentID(w, r)
if !ok {
return
}
ctx := r.Context()
agent, err := s.agentRepo.Get(
ctx,
datastore.AgentID(agentID),
)
if err != nil {
if errors.Is(err, datastore.ErrNotFound) {
api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
return
}
logger.Error(ctx, "could not get agent", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
return
}
api.DataResponse(w, http.StatusOK, struct {
Agent *datastore.Agent `json:"agent"`
}{
Agent: agent,
})
}
func getAgentID(w http.ResponseWriter, r *http.Request) (datastore.AgentID, bool) {
rawAgentID := chi.URLParam(r, "agentID")
agentID, err := strconv.ParseInt(rawAgentID, 10, 64)
if err != nil {
logger.Error(r.Context(), "could not parse agent id", logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)
return 0, false
}
return datastore.AgentID(agentID), true
}
func getIntQueryParam(w http.ResponseWriter, r *http.Request, param string, defaultValue int64) (int64, bool) {
rawValue := r.URL.Query().Get(param)
if rawValue != "" {
value, err := strconv.ParseInt(rawValue, 10, 64)
if err != nil {
logger.Error(r.Context(), "could not parse int param", logger.F("param", param), logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)
return 0, false
}
return value, true
}
return defaultValue, true
}
func getStringSliceValues(w http.ResponseWriter, r *http.Request, param string, defaultValue []string) ([]string, bool) {
rawValue := r.URL.Query().Get(param)
if rawValue != "" {
values := strings.Split(rawValue, ",")
return values, true
}
return defaultValue, true
}
func getIntSliceValues(w http.ResponseWriter, r *http.Request, param string, defaultValue []int64) ([]int64, bool) {
rawValue := r.URL.Query().Get(param)
if rawValue != "" {
rawValues := strings.Split(rawValue, ",")
values := make([]int64, 0, len(rawValues))
for _, rv := range rawValues {
value, err := strconv.ParseInt(rv, 10, 64)
if err != nil {
logger.Error(r.Context(), "could not parse int slice param", logger.F("param", param), logger.E(errors.WithStack(err)))
api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)
return nil, false
}
values = append(values, value)
}
return values, true
}
return defaultValue, true
}