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conversation.go
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conversation.go
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package main
import (
"bytes"
"encoding/json"
"io/ioutil"
"net/http"
"sync"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
)
type Conversation struct {
device *Device
mercury *Mercury
kms *KMS
spaces map[string]*Space
spacesMutex sync.RWMutex
teams map[string]*Team
teamsMutex sync.RWMutex
newSpaceEventHandlers []func(*Space)
newActivityEventHandlers []func(*Space, *Activity)
logger *log.Entry
}
type Team struct {
Id string
DisplayName string
}
func NewConversation(device *Device, mercury *Mercury, kms *KMS) *Conversation {
c := &Conversation{
device: device,
mercury: mercury,
kms: kms,
spaces: make(map[string]*Space),
teams: make(map[string]*Team),
logger: log.WithField("type", "Conversation"),
}
mercury.RegisterHandler("conversation.activity", c.ParseActivity)
// Fetch current spaces
go c.FetchAllSpaces()
return c
}
func (c *Conversation) ParseActivity(msg []byte) {
logger := c.logger.WithField("func", "ParseActivity").WithField("message", string(msg))
var mercuryConversationActivity MercuryConversationActivity
err := json.Unmarshal(msg, &mercuryConversationActivity)
if err != nil {
logger.WithError(err).Error("Failed to unmarshal msg")
return
}
logger = logger.WithField("activity", mercuryConversationActivity)
switch mercuryConversationActivity.Data.Activity.Verb {
case "post":
logger = logger.WithField("space", mercuryConversationActivity.Data.Activity.Target.Id)
logger.Trace("Post in space")
space, err := c.GetSpace(mercuryConversationActivity.Data.Activity.Target.Id)
if err != nil {
logger.WithError(err).Error("Failed to get space")
return
}
a := space.AddActivity(mercuryConversationActivity.Data.Activity)
for _, f := range c.newActivityEventHandlers {
f(space, a)
}
case "add":
logger.Trace("New space")
case "create":
logger = logger.WithField("space", mercuryConversationActivity.Data.Activity.Object.Id)
logger.Trace("New space")
_, err := c.GetSpace(mercuryConversationActivity.Data.Activity.Object.Id)
if err != nil {
logger.WithError(err).Error("Failed to get space")
return
}
case "leave":
logger.Trace("Leave space")
case "hide":
logger.Trace("Leave space")
case "update":
logger = logger.WithField("space", mercuryConversationActivity.Data.Activity.Target.Id)
logger.Trace("Update space")
space, err := c.GetSpace(mercuryConversationActivity.Data.Activity.Target.Id)
if err != nil {
logger.WithError(err).Error("Failed to get space")
return
}
displayName, err := space.Decrypt(mercuryConversationActivity.Data.Activity.Object.DisplayName)
if err != nil {
logger.WithError(err).Error("Failed to decrypt display name")
return
}
space.DisplayName = string(displayName)
case "acknowledge":
logger.Trace("Space marked as read")
default:
logger.Error("Unhandled verb")
}
}
func (c *Conversation) FetchAllSpaces() {
logger := c.logger.WithField("func", "FetchAllSpaces")
// Fetch spaces
logger.Trace("Request conversations")
response, err := c.device.RequestService("GET", "conversationServiceUrl", "/conversations", nil)
if err != nil {
logger.WithError(err).Error("Failed to fetch conversations")
return
}
defer response.Body.Close()
var r struct {
Items []RawSpace
}
err = json.NewDecoder(response.Body).Decode(&r)
if err != nil {
logger.WithError(err).Error("Failed to unmarshal conversations")
return
}
for _, space := range r.Items {
logger := logger.WithField("rawSpace", space)
if space.Tags.Contains("HIDDEN") {
continue
}
_, err := c.AddSpace(space)
if err != nil {
logger.WithError(err).Error("Failed to add space")
continue
}
}
}
func (c *Conversation) GetSpace(uuid string) (*Space, error) {
logger := c.logger.WithField("func", "GetSpace").WithField("uuid", uuid)
c.spacesMutex.RLock()
if space, ok := c.spaces[uuid]; ok {
c.spacesMutex.RUnlock()
return space, nil
}
c.spacesMutex.RUnlock()
// Fetch conversation
logger.Trace("Request conversation")
response, err := c.device.RequestService("GET", "conversationServiceUrl", "/conversations/"+uuid, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to fetch conversation")
}
defer response.Body.Close()
var r RawSpace
err = json.NewDecoder(response.Body).Decode(&r)
if err != nil {
return nil, errors.Wrap(err, "failed to fetch conversation")
}
return c.AddSpace(r)
}
func (c *Conversation) AddSpace(r RawSpace) (*Space, error) {
logger := c.logger.WithField("func", "AddSpace").WithField("rawSpace", r)
logger.Trace("Adding space")
// Fetch conversation key
logger = logger.WithField("kid", r.EncryptionKeyUrl)
key, err := c.kms.GetKey(r.EncryptionKeyUrl)
if err != nil {
return nil, errors.Wrap(err, "failed to fech decryption key")
}
space := &Space{
Id: r.Id,
EncryptionKey: key,
Tags: r.Tags,
conversation: c,
logger: c.logger.WithField("spaceId", r.Id),
}
// Store & Update space
c.spacesMutex.Lock()
if s, ok := c.spaces[space.Id]; !ok {
c.spaces[space.Id] = space
c.spacesMutex.Unlock()
space.Update(r)
// Events
for _, f := range c.newSpaceEventHandlers {
f(space)
}
return space, nil
} else {
// Space already exists, return current
c.spacesMutex.Unlock()
return s, nil
}
}
func (c *Conversation) GetTeam(uuid string) (*Team, error) {
logger := c.logger.WithField("func", "GetTeam").WithField("uuid", uuid)
c.teamsMutex.RLock()
if team, ok := c.teams[uuid]; ok {
c.teamsMutex.RUnlock()
return team, nil
}
c.teamsMutex.RUnlock()
// Fetch Team
logger.Trace("Request Team")
response, err := c.device.RequestService("GET", "conversationServiceUrl", "/teams/"+uuid, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to fetch team")
}
defer response.Body.Close()
var rawTeam struct {
Id string
EncryptionKeyUrl string
DisplayName string
}
err = json.NewDecoder(response.Body).Decode(&rawTeam)
if err != nil {
return nil, errors.Wrap(err, "failed to fetch unmarshal team")
}
logger = logger.WithField("rawTeam", rawTeam)
logger.Trace("Got team")
displayName, err := c.kms.Decrypt(rawTeam.DisplayName, rawTeam.EncryptionKeyUrl)
if err != nil {
return nil, errors.Wrap(err, "failed to decrypt displayName")
}
team := &Team{
Id: rawTeam.Id,
DisplayName: string(displayName),
}
// Store
c.teamsMutex.Lock()
c.teams[uuid] = team
c.teamsMutex.Unlock()
return team, nil
}
func (c *Conversation) AddNewSpaceEventHandler(f func(*Space)) {
c.newSpaceEventHandlers = append(c.newSpaceEventHandlers, f)
}
func (c *Conversation) AddNewActivityEventHandler(f func(*Space, *Activity)) {
c.newActivityEventHandlers = append(c.newActivityEventHandlers, f)
}
func (c *Conversation) CreateSpace(name string) {
logger := c.logger.WithField("func", "CreateSpace").WithField("spaceName", name)
// Create a new encryption key
key, err := c.kms.CreateKey()
if err != nil {
logger.WithError(err).Error("Failed to create space encryption key")
return
}
encryptedName, err := EncryptWithKey([]byte(name), key)
if err != nil {
logger.WithError(err).Error("Failed to encrypt space name")
return
}
// Create a KMS request
kmsMessage, err := c.kms.NewResourceCreateMessage(key)
if err != nil {
logger.WithError(err).Error("Failed create new ressource KMS message")
return
}
// Forge request
type newSpaceActivityObject struct {
Id string `json:"id"`
ObjectType string `json:"objectType"`
}
type newSpaceActivity struct {
Verb string `json:"verb"`
ObjectType string `json:"objectType"`
Actor newSpaceActivityObject `json:"actor"`
Object *newSpaceActivityObject `json:"object,omitempty"`
}
newSpace := struct {
Activities struct {
Items []newSpaceActivity `json:"items"`
} `json:"activities"`
DefaultActivityEncryptionKeyUrl string `json:"defaultActivityEncryptionKeyUrl"`
DisplayName string `json:"displayName"`
EncryptionKeyUrl string `json:"encryptionKeyUrl"`
ObjectType string `json:"objectType"`
KmsMessage string `json:"kmsMessage"`
}{
DefaultActivityEncryptionKeyUrl: key.KeyID,
DisplayName: encryptedName,
EncryptionKeyUrl: key.KeyID,
ObjectType: "conversation",
KmsMessage: kmsMessage,
}
newSpace.Activities.Items = []newSpaceActivity{
{
Verb: "create",
ObjectType: "activity",
Actor: newSpaceActivityObject{
ObjectType: "person",
Id: c.device.UserID,
},
},
{
Verb: "add",
ObjectType: "activity",
Actor: newSpaceActivityObject{
ObjectType: "person",
Id: c.device.UserID,
},
Object: &newSpaceActivityObject{
ObjectType: "person",
Id: c.device.UserID,
},
},
}
data, err := json.Marshal(newSpace)
if err != nil {
logger.WithError(err).Error("Failed to marshal new space request")
return
}
response, err := c.device.RequestService("POST", "conversationServiceUrl", "/conversations", bytes.NewReader(data))
if err != nil {
logger.WithError(err).Error("Failed to request space creation")
return
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
responseError, err := ioutil.ReadAll(response.Body)
if err != nil {
logger.WithError(err).Error("Failed to read error response")
return
}
logger.Errorf("Failed to request ace creation: %s", responseError)
return
}
}