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assistant.go
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assistant.go
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/*
* Teleport
* Copyright (C) 2023 Gravitational, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package local
import (
"context"
"encoding/json"
"sort"
"time"
"github.com/google/uuid"
"github.com/gravitational/trace"
"github.com/sirupsen/logrus"
"google.golang.org/protobuf/types/known/timestamppb"
"github.com/gravitational/teleport/api/gen/proto/go/assist/v1"
"github.com/gravitational/teleport/lib/backend"
)
// Conversation is a conversation entry in the backend.
type Conversation struct {
Title string `json:"title,omitempty"`
ConversationID string `json:"conversation_id"`
CreatedTime time.Time `json:"created_time"`
}
// AssistService is responsible for managing assist conversations.
type AssistService struct {
backend.Backend
log logrus.FieldLogger
}
// NewAssistService returns a new instance of AssistService.
func NewAssistService(backend backend.Backend) *AssistService {
return &AssistService{
Backend: backend,
log: logrus.WithField(trace.Component, "assist"),
}
}
// CreateAssistantConversation creates a new conversation entry in the backend.
func (s *AssistService) CreateAssistantConversation(ctx context.Context,
req *assist.CreateAssistantConversationRequest,
) (*assist.CreateAssistantConversationResponse, error) {
if req.Username == "" {
return nil, trace.BadParameter("missing parameter username")
}
if req.CreatedTime == nil {
return nil, trace.BadParameter("missing parameter created time")
}
conversationID := uuid.New().String()
payload := &Conversation{
ConversationID: conversationID,
CreatedTime: req.GetCreatedTime().AsTime(),
}
value, err := json.Marshal(payload)
if err != nil {
return nil, trace.Wrap(err)
}
item := backend.Item{
Key: backend.Key(assistantConversationPrefix, req.Username, conversationID),
Value: value,
}
_, err = s.Create(ctx, item)
if err != nil {
return nil, trace.Wrap(err)
}
return &assist.CreateAssistantConversationResponse{Id: conversationID}, nil
}
// getConversation returns a conversation from the backend.
func (s *AssistService) getConversation(ctx context.Context, username, conversationID string) (*Conversation, error) {
item, err := s.Get(ctx, backend.Key(assistantConversationPrefix, username, conversationID))
if err != nil {
return nil, trace.Wrap(err)
}
var conversation Conversation
if err := json.Unmarshal(item.Value, &conversation); err != nil {
return nil, trace.Wrap(err)
}
return &conversation, nil
}
// DeleteAssistantConversation deletes a conversation from the backend.
func (s *AssistService) DeleteAssistantConversation(ctx context.Context, req *assist.DeleteAssistantConversationRequest) error {
if req.Username == "" {
return trace.BadParameter("missing parameter username")
}
if req.ConversationId == "" {
return trace.BadParameter("missing parameter conversation ID")
}
// Delete all messages in the conversation first, so that if the delete
// fails, the conversation is still there. Client can retry the deleting.
if err := s.deleteAllMessages(ctx, req.Username, req.ConversationId); err != nil {
return trace.Wrap(err)
}
// Delete the conversation.
if err := s.Delete(ctx, backend.Key(assistantConversationPrefix, req.Username, req.ConversationId)); err != nil {
return trace.Wrap(err)
}
return nil
}
// deleteAllMessages deletes all messages in a conversation.
func (s *AssistService) deleteAllMessages(ctx context.Context, username, conversationID string) error {
startKey := backend.ExactKey(assistantMessagePrefix, username, conversationID)
if err := s.DeleteRange(ctx, startKey, backend.RangeEnd(startKey)); err != nil {
return trace.Wrap(err)
}
return nil
}
// UpdateAssistantConversationInfo updates the conversation title.
func (s *AssistService) UpdateAssistantConversationInfo(ctx context.Context, request *assist.UpdateAssistantConversationInfoRequest) error {
if request.ConversationId == "" {
return trace.BadParameter("missing conversation ID")
}
if request.Username == "" {
return trace.BadParameter("missing username")
}
if request.Title == "" {
return trace.BadParameter("missing title")
}
msg, err := s.getConversation(ctx, request.Username, request.GetConversationId())
if err != nil {
return trace.Wrap(err)
}
// Only update the title, leave the rest of the fields intact.
msg.Title = request.Title
payload, err := json.Marshal(msg)
if err != nil {
return trace.Wrap(err)
}
item := backend.Item{
Key: backend.Key(assistantConversationPrefix, request.GetUsername(), request.GetConversationId()),
Value: payload,
}
if _, err = s.Update(ctx, item); err != nil {
return trace.Wrap(err)
}
return nil
}
// GetAssistantConversations returns all conversations started by a user.
func (s *AssistService) GetAssistantConversations(ctx context.Context, req *assist.GetAssistantConversationsRequest) (*assist.GetAssistantConversationsResponse, error) {
if req.Username == "" {
return nil, trace.BadParameter("missing username")
}
startKey := backend.ExactKey(assistantConversationPrefix, req.Username)
result, err := s.GetRange(ctx, startKey, backend.RangeEnd(startKey), backend.NoLimit)
if err != nil {
return nil, trace.Wrap(err)
}
conversationsIDs := make([]*assist.ConversationInfo, 0, len(result.Items))
for _, item := range result.Items {
payload := &Conversation{}
if err := json.Unmarshal(item.Value, payload); err != nil {
return nil, trace.Wrap(err)
}
conversationsIDs = append(conversationsIDs, &assist.ConversationInfo{
Id: payload.ConversationID,
Title: payload.Title,
CreatedTime: timestamppb.New(payload.CreatedTime),
})
}
sort.Slice(conversationsIDs, func(i, j int) bool {
return conversationsIDs[i].CreatedTime.AsTime().Before(conversationsIDs[j].GetCreatedTime().AsTime())
})
return &assist.GetAssistantConversationsResponse{
Conversations: conversationsIDs,
}, nil
}
// GetAssistantMessages returns all messages with given conversation ID.
func (s *AssistService) GetAssistantMessages(ctx context.Context, req *assist.GetAssistantMessagesRequest) (*assist.GetAssistantMessagesResponse, error) {
if req.Username == "" {
return nil, trace.BadParameter("missing username")
}
if req.ConversationId == "" {
return nil, trace.BadParameter("missing conversation ID")
}
startKey := backend.ExactKey(assistantMessagePrefix, req.Username, req.ConversationId)
result, err := s.GetRange(ctx, startKey, backend.RangeEnd(startKey), backend.NoLimit)
if err != nil {
return nil, trace.Wrap(err)
}
out := make([]*assist.AssistantMessage, len(result.Items))
for i, item := range result.Items {
var a assist.AssistantMessage
if err := json.Unmarshal(item.Value, &a); err != nil {
return nil, trace.Wrap(err)
}
out[i] = &a
}
sort.Slice(out, func(i, j int) bool {
// Sort by created time.
return out[i].CreatedTime.AsTime().Before(out[j].GetCreatedTime().AsTime())
})
return &assist.GetAssistantMessagesResponse{
Messages: out,
}, nil
}
// CreateAssistantMessage adds the message to the backend.
func (s *AssistService) CreateAssistantMessage(ctx context.Context, req *assist.CreateAssistantMessageRequest) error {
if req.Username == "" {
return trace.BadParameter("missing username")
}
if req.ConversationId == "" {
return trace.BadParameter("missing conversation ID")
}
// Check if the conversation exists.
conversationKey := backend.Key(assistantConversationPrefix, req.Username, req.ConversationId)
if _, err := s.Get(ctx, conversationKey); err != nil {
if trace.IsNotFound(err) {
return trace.NotFound("conversation %q not found", req.ConversationId)
}
return trace.Wrap(err)
}
msg := req.GetMessage()
value, err := json.Marshal(msg)
if err != nil {
return trace.Wrap(err)
}
messageID := uuid.New().String()
item := backend.Item{
Key: backend.Key(assistantMessagePrefix, req.Username, req.ConversationId, messageID),
Value: value,
}
_, err = s.Create(ctx, item)
return trace.Wrap(err)
}
// IsAssistEnabled returns true if the assist is enabled or not on the auth level.
func (s *AssistService) IsAssistEnabled(ctx context.Context) (*assist.IsAssistEnabledResponse, error) {
return &assist.IsAssistEnabledResponse{Enabled: s.Backend.GetName() != "etcd"}, nil
}