func (self *channelAPI) Blob_Permission(perma grapher.PermaNode, permission grapher.PermissionNode) {
mutJson := map[string]interface{}{"perma": perma.BlobRef(), "seq": permission.SequenceNumber(), "type": "permission", "user": permission.UserName(), "allow": permission.AllowBits(), "deny": permission.DenyBits(), "blobref": permission.BlobRef()}
switch permission.Action() {
case grapher.PermAction_Invite:
mutJson["action"] = "invite"
case grapher.PermAction_Expel:
mutJson["action"] = "expel"
case grapher.PermAction_Change:
mutJson["action"] = "change"
default:
panic("Unknown action")
}
schema, err := json.Marshal(mutJson)
if err != nil {
panic(err.String())
}
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
err = self.forwardToFollowers(perma.BlobRef(), string(schema))
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
}
func (self *channelAPI) Blob_Mutation(perma grapher.PermaNode, mutation grapher.MutationNode) {
mutJson := map[string]interface{}{"perma": perma.BlobRef(), "seq": mutation.SequenceNumber(), "type": "mutation", "signer": mutation.Signer(), "entity": mutation.EntityBlobRef(), "field": mutation.Field(), "time": mutation.Time()}
switch mutation.Operation().(type) {
case []ot.StringOperation:
op := mutation.Operation().([]ot.StringOperation) // The following two lines work around a problem in GO/JSON
mutJson["op"] = &op
case []byte:
msg := json.RawMessage(mutation.Operation().([]byte))
mutJson["op"] = &msg
default:
panic("Unsupported operation kind")
}
schema, err := json.Marshal(mutJson)
if err != nil {
panic(err.String())
}
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
err = self.forwardToFollowers(perma.BlobRef(), string(schema))
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
}
func (self *dummyAPI) Signal_ReceivedInvitation(perma grapher.PermaNode, permission grapher.PermissionNode) {
log.Printf("APP %v: Received Invitation", self.userID)
// Automatically accept the invitation
_, err := self.grapher.CreateKeepBlob(perma.BlobRef(), permission.BlobRef())
if err != nil {
self.t.Fatal(err.String())
}
}
func (self *channelAPI) Signal_AcceptedInvitation(perma grapher.PermaNode, permission grapher.PermissionNode, keep grapher.KeepNode) {
msgJson := map[string]interface{}{"perma": perma.BlobRef(), "type": "accept", "signer": permission.Signer(), "permission": permission.BlobRef()}
schema, err := json.Marshal(msgJson)
if err != nil {
panic(err.String())
}
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
err = self.forwardToUser(keep.Signer(), string(schema))
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
}
func (self *channelAPI) Blob_DeleteEntity(perma grapher.PermaNode, entity grapher.DelEntityNode) {
entityJson := map[string]interface{}{"perma": perma.BlobRef(), "seq": entity.SequenceNumber(), "type": "delentity", "signer": entity.Signer(), "blobref": entity.BlobRef(), "entity": entity.EntityBlobRef()}
schema, err := json.Marshal(entityJson)
if err != nil {
panic(err.String())
}
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
err = self.forwardToFollowers(perma.BlobRef(), string(schema))
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
}
func (self *channelAPI) Blob_Keep(perma grapher.PermaNode, permission grapher.PermissionNode, keep grapher.KeepNode) {
mutJson := map[string]interface{}{"perma": perma.BlobRef(), "seq": keep.SequenceNumber(), "type": "keep", "signer": keep.Signer(), "mimetype": perma.MimeType()}
if permission != nil {
mutJson["permission"] = permission.SequenceNumber()
}
schema, err := json.Marshal(mutJson)
if err != nil {
panic(err.String())
}
message := string(schema)
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
self.forwardToUser(keep.Signer(), message)
err = self.forwardToFollowers(perma.BlobRef(), message)
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
}
func (self *channelAPI) Signal_ReceivedInvitation(perma grapher.PermaNode, permission grapher.PermissionNode) {
// TODO: Compute digest
var digest = "Untitled page"
msgJson := map[string]interface{}{"perma": perma.BlobRef(), "type": "invitation", "signer": permission.Signer(), "permission": permission.BlobRef(), "digest": digest}
fillInboxItem(self.store, perma.BlobRef(), int64(0), msgJson)
schema, err := json.Marshal(msgJson)
if err != nil {
panic(err.String())
}
if self.bufferOnly {
self.messageBuffer = append(self.messageBuffer, string(schema))
} else {
if perma.MimeType() == "application/x-lightwave-page" {
addToInbox(self.c, permission.UserName(), perma.BlobRef(), 0)
}
err = self.forwardToUser(permission.UserName(), string(schema))
}
if err != nil {
log.Printf("Err Forward: %v", err)
}
// Automatically accept the invitation
// self.grapher.CreateKeepBlob(perma.BlobRef(), permission.BlobRef())
}
func handleOpen(w http.ResponseWriter, r *http.Request) {
c := appengine.NewContext(r)
userid, sessionid, err := getSession(c, r)
if err != nil {
sendError(w, r, "No session cookie")
return
}
// Read the request body
jreq, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, "Error reading request body", http.StatusInternalServerError)
return
}
r.Body.Close()
// Parse request
var req openCloseRequest
err = json.Unmarshal(jreq, &req)
if err != nil {
sendError(w, r, "Malformed JSON")
return
}
// Load the channel infos
var ch channelStruct
if err = datastore.Get(c, datastore.NewKey("channel", userid+"/"+sessionid, 0, nil), &ch); err != nil {
sendError(w, r, "Unknown channel: "+userid+"/"+sessionid)
return
}
// Check
if len(ch.OpenPermas) >= 10 {
sendError(w, r, "Too many open channels")
return
}
is_open := false
for _, p := range ch.OpenPermas {
if p == req.Perma {
is_open = true
break
}
}
var perma grapher.PermaNode
if !is_open {
// Update channel infos
ch.OpenPermas = append(ch.OpenPermas, req.Perma)
_, err = datastore.Put(c, datastore.NewKey("channel", userid+"/"+sessionid, 0, nil), &ch)
if err != nil {
sendError(w, r, "Internal server error")
return
}
// Repeat all blobs from this document.
s := newStore(c)
g := grapher.NewGrapher(userid, schema, s, s, nil)
s.SetGrapher(g)
ch := newChannelAPI(c, s, userid, sessionid, true, g)
perma, err = g.Repeat(req.Perma, req.From)
if err != nil {
sendError(w, r, "Failed opening")
return
}
fmt.Fprintf(w, `{"ok":true, "blobs":[%v]}`, strings.Join(ch.messageBuffer, ","))
} else {
fmt.Fprint(w, `{"ok":true, "blobs":[]}`)
}
if req.MarkAsRead {
if perma == nil {
s := newStore(c)
data, err := s.GetPermaNode(req.Perma)
if err != nil {
log.Printf("Err: Failed reading permanode")
return
}
perma = grapher.NewPermaNode(nil)
perma.FromMap(req.Perma, data)
}
markAsRead(c, userid, perma.BlobRef(), perma.SequenceNumber()-1)
}
}
func (self *uniAPI) blob(perma grapher.PermaNode, blob grapher.OTNode) {
log.Printf("API blob %v", blob.SequenceNumber())
self.mutex.Lock()
// Is this perma blob opened?
nextSeqNumber, ok := self.open[perma.BlobRef()]
if !ok {
// Is this a new keep of the local user? If yes, send it. Otherwise ignore it
if keep, ok := blob.(grapher.KeepNode); ok && keep.Signer() == self.userID {
self.mutex.Unlock()
self.app.Signal_ProcessedKeep(perma, keep)
return
}
self.mutex.Unlock()
return
}
if nextSeqNumber > blob.SequenceNumber() {
// Ignore this mutation. We have seen it already (should not happen anyway)
self.mutex.Unlock()
return
}
if nextSeqNumber < blob.SequenceNumber() {
// Remember that we need to process these mutations later on, too, but not now
q, ok := self.queues[perma.BlobRef()]
if !ok || blob.SequenceNumber() < q {
self.queues[perma.BlobRef()] = blob.SequenceNumber()
}
self.mutex.Unlock()
return
}
// Store the next expected sequence number
self.open[perma.BlobRef()] = blob.SequenceNumber() + 1
// Is there a need to continue with queued mutations?
cont := int64(-1)
j, ok := self.queues[perma.BlobRef()]
if ok {
cont = j
self.queues[perma.BlobRef()] = 0, false
}
self.mutex.Unlock()
// Notify the application
self.app.Blob(perma, blob)
// Ask to repeat further blobs in case we have already seen some
if cont != -1 {
self.grapher.Repeat(perma.BlobRef(), cont)
}
}