cli: Keep track of conversations and prettify output

cli/client.go

@@ -28,7 +28,7 @@ type Client struct {
 
 // XXX need to handle backend connection loss/reconnection..
 func (c *Client) Initialize() error {
-	c.Contacts = NewContactList()
+	c.Contacts = NewContactList(c)
 	c.monitorsChannel = make(chan interface{}, 10)
 	c.blockChannel = make(chan struct{})
 	c.unblockChannel = make(chan struct{})
@@ -236,6 +236,7 @@ func (c *Client) onContactEvent(event *ricochet.ContactEvent) {
 }
 
 func (c *Client) onConversationEvent(event *ricochet.ConversationEvent) {
+	// XXX Ignoring updates, errors, etc
 	if event.Type != ricochet.ConversationEvent_RECEIVE &&
 		event.Type != ricochet.ConversationEvent_SEND &&
 		event.Type != ricochet.ConversationEvent_POPULATE {
@@ -268,24 +269,8 @@ func (c *Client) onConversationEvent(event *ricochet.ConversationEvent) {
 		return
 	}
 
-	if event.Type != ricochet.ConversationEvent_POPULATE {
-		c.Ui.PrintMessage(remoteContact, message.Sender.IsSelf, message.Text)
-	}
-
-	// XXX Shouldn't mark until displayed
-	if !message.Sender.IsSelf {
-		backend := c.Backend
-		message := message
-		go func() {
-			_, err := backend.MarkConversationRead(context.Background(), &ricochet.MarkConversationReadRequest{
-				Entity:             message.Sender,
-				LastRecvIdentifier: message.Identifier,
-			})
-			if err != nil {
-				log.Printf("Mark conversation read failed: %v", err)
-			}
-		}()
-	}
+	remoteContact.Conversation.AddMessage(message,
+		event.Type == ricochet.ConversationEvent_POPULATE)
 }
 
 func (c *Client) NetworkControlStatus() ricochet.TorControlStatus {

cli/contact.go

@@ -7,11 +7,13 @@ import (
 )
 
 type ContactList struct {
+	Client   *Client
 	Contacts map[int32]*Contact
 }
 
-func NewContactList() *ContactList {
+func NewContactList(client *Client) *ContactList {
 	return &ContactList{
+		Client:   client,
 		Contacts: make(map[int32]*Contact),
 	}
 }
@@ -21,7 +23,7 @@ func (cl *ContactList) Populate(data *ricochet.Contact) error {
 		return fmt.Errorf("Duplicate contact ID %d in populate", data.Id)
 	}
 
-	cl.Contacts[data.Id] = initContact(data)
+	cl.Contacts[data.Id] = initContact(cl.Client, data)
 	return nil
 }
 
@@ -30,7 +32,7 @@ func (cl *ContactList) Added(data *ricochet.Contact) (*Contact, error) {
 		return nil, fmt.Errorf("Duplicate contact ID %d in add", data.Id)
 	}
 
-	contact := initContact(data)
+	contact := initContact(cl.Client, data)
 	cl.Contacts[data.Id] = contact
 	return contact, nil
 }
@@ -63,13 +65,19 @@ func (cl *ContactList) ByIdAndAddress(id int32, address string) *Contact {
 }
 
 type Contact struct {
-	Data *ricochet.Contact
+	Data         *ricochet.Contact
+	Conversation *Conversation
 }
 
-func initContact(data *ricochet.Contact) *Contact {
-	return &Contact{
+func initContact(client *Client, data *ricochet.Contact) *Contact {
+	c := &Contact{
 		Data: data,
 	}
+	c.Conversation = &Conversation{
+		Client:  client,
+		Contact: c,
+	}
+	return c
 }
 
 func (c *Contact) Updated(newData *ricochet.Contact) error {

cli/conversation.go

@@ -0,0 +1,236 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"github.com/ricochet-im/ricochet-go/rpc"
+	"golang.org/x/net/context"
+	"log"
+	"time"
+)
+
+const (
+	maxMessageTextLength = 2000
+	// Number of messages before the first unread message shown when
+	// opening a conversation
+	backlogContextNum = 3
+	// Maximum number of messages to keep in the backlog. Unread messages
+	// will never be discarded to keep this limit, and at least
+	// backlogContextNum messages are kept before the first unread message.
+	backlogSoftLimit = 100
+	// Hard limit for the maximum numer of messages to keep in the backlog
+	backlogHardLimit = 200
+)
+
+type Conversation struct {
+	Client  *Client
+	Contact *Contact
+
+	messages []*ricochet.Message
+}
+
+// Send an outbound message to the contact and add that message into the
+// conversation backlog. Blocking API call.
+func (c *Conversation) SendMessage(text string) error {
+	msg, err := c.Client.Backend.SendMessage(context.Background(), &ricochet.Message{
+		Sender: &ricochet.Entity{IsSelf: true},
+		Recipient: &ricochet.Entity{
+			ContactId: c.Contact.Data.Id,
+			Address:   c.Contact.Data.Address,
+		},
+		Text: text,
+	})
+	if err != nil {
+		fmt.Printf("send message error: %v\n", err)
+		return err
+	}
+
+	if err := c.validateMessage(msg); err != nil {
+		log.Printf("Conversation sent message does not validate: %v", err)
+	}
+	c.messages = append(c.messages, msg)
+	c.trimBacklog()
+	c.printMessage(msg)
+
+	return nil
+}
+
+// Add a message to the conversation. The message can be inbound or
+// outbound. This is called for message events from the backend, and should
+// not be used when sending messages. If 'populating' is true, this message
+// is part of the initial sync of the history from the backend.
+func (c *Conversation) AddMessage(msg *ricochet.Message, populating bool) {
+	if err := c.validateMessage(msg); err != nil {
+		log.Printf("Rejected conversation message: %v", err)
+		return
+	}
+
+	c.messages = append(c.messages, msg)
+	c.trimBacklog()
+	if !populating {
+		// XXX Need to do mark-as-read when displaying received messages in
+		// an active conversation.
+		// XXX Also, need to limit prints to the active conversation.
+		// XXX Quite possibly, more of the active conversation logic belongs here.
+		c.printMessage(msg)
+	}
+}
+
+// XXX
+func (c *Conversation) AddStatusMessage(text string, backlog bool) {
+}
+
+// Mark all unread messages in this conversation as read on the backend.
+func (c *Conversation) MarkAsRead() error {
+	// Get the identifier of the last received message
+	var lastRecvMsg *ricochet.Message
+
+findMessageId:
+	for i := len(c.messages) - 1; i >= 0; i-- {
+		switch c.messages[i].Status {
+		case ricochet.Message_UNREAD:
+			lastRecvMsg = c.messages[i]
+			break findMessageId
+		case ricochet.Message_READ:
+			break findMessageId
+		}
+	}
+
+	if lastRecvMsg != nil {
+		return c.MarkAsReadBefore(lastRecvMsg)
+	}
+	return nil
+}
+
+func (c *Conversation) MarkAsReadBefore(message *ricochet.Message) error {
+	if err := c.validateMessage(message); err != nil {
+		return err
+	} else if message.Sender.IsSelf {
+		return errors.New("Outbound messages cannot be marked as read")
+	}
+
+	// XXX This probably means it's impossible to mark messages as read
+	// if the sender uses 0 identifiers. We really should not use actual
+	// protocol identifiers in RPC API.
+	_, err := c.Client.Backend.MarkConversationRead(context.Background(),
+		&ricochet.MarkConversationReadRequest{
+			Entity:             message.Sender,
+			LastRecvIdentifier: message.Identifier,
+		})
+	if err != nil {
+		log.Printf("Mark conversation read failed: %v", err)
+	}
+	return err
+}
+
+func (c *Conversation) PrintContext() {
+	// Print starting from backlogContextNum messages before the first unread
+	start := len(c.messages) - backlogContextNum
+	for i, message := range c.messages {
+		if message.Status == ricochet.Message_UNREAD {
+			start = i - backlogContextNum
+			break
+		}
+	}
+
+	if start < 0 {
+		start = 0
+	}
+
+	for i := start; i < len(c.messages); i++ {
+		c.printMessage(c.messages[i])
+	}
+}
+
+func (c *Conversation) trimBacklog() {
+	if len(c.messages) > backlogHardLimit {
+		c.messages = c.messages[len(c.messages)-backlogHardLimit:]
+	}
+	if len(c.messages) <= backlogSoftLimit {
+		return
+	}
+
+	// Find the index of the oldest unread message
+	var keepIndex int
+	for i, message := range c.messages {
+		if message.Status == ricochet.Message_UNREAD {
+			// Keep backlogContextNum messages before the first unread one
+			keepIndex = i - backlogContextNum
+			if keepIndex < 0 {
+				keepIndex = 0
+			}
+			break
+		} else if len(c.messages)-i <= backlogSoftLimit {
+			// Remove all messages before this one to reduce to the limit
+			keepIndex = i
+			break
+		}
+	}
+
+	c.messages = c.messages[keepIndex:]
+}
+
+// Validate that a message object is well-formed, sane, and belongs
+// to this conversation.
+func (c *Conversation) validateMessage(msg *ricochet.Message) error {
+	if msg.Sender == nil || msg.Recipient == nil {
+		return fmt.Errorf("Message entities are incomplete: %v %v", msg.Sender, msg.Recipient)
+	}
+
+	var localEntity *ricochet.Entity
+	var remoteEntity *ricochet.Entity
+	if msg.Sender.IsSelf {
+		localEntity = msg.Sender
+		remoteEntity = msg.Recipient
+	} else {
+		localEntity = msg.Recipient
+		remoteEntity = msg.Sender
+	}
+
+	if !localEntity.IsSelf || localEntity.ContactId != 0 ||
+		(len(localEntity.Address) > 0 && localEntity.Address != c.Client.Identity.Address) {
+		return fmt.Errorf("Invalid self entity on message: %v", localEntity)
+	}
+
+	if remoteEntity.IsSelf || remoteEntity.ContactId != c.Contact.Data.Id ||
+		remoteEntity.Address != c.Contact.Data.Address {
+		return fmt.Errorf("Invalid remote entity on message: %v", remoteEntity)
+	}
+
+	// XXX timestamp
+	// XXX identifier
+
+	if msg.Status == ricochet.Message_NULL {
+		return fmt.Errorf("Message has null status: %v", msg)
+	}
+
+	// XXX more sanity checks on message text?
+	if len(msg.Text) == 0 || len(msg.Text) > maxMessageTextLength {
+		return errors.New("Message text is unacceptable")
+	}
+
+	return nil
+}
+
+func (c *Conversation) printMessage(msg *ricochet.Message) {
+	// XXX actual timestamp
+	ts := "\x1b[90m" + time.Now().Format("15:04") + "\x1b[39m"
+
+	var direction string
+	if msg.Sender.IsSelf {
+		direction = "\x1b[34m<<\x1b[39m"
+	} else {
+		direction = "\x1b[31m>>\x1b[39m"
+	}
+
+	// XXX shell escaping
+	fmt.Fprintf(Ui.Input.Stdout(), "\r%s | %s %s %s\n",
+		ts,
+		c.Contact.Data.Nickname,
+		direction,
+		msg.Text)
+
+	/*
+		fmt.Fprintf(ui.Input.Stdout(), "\r\x1b[31m( \x1b[39mNew message from \x1b[31m%s\x1b[39m -- \x1b[1m/%d\x1b[0m to view \x1b[31m)\x1b[39m\n", contact.Data.Nickname, contact.Data.Id)
+	*/
+}

cli/ui.go

@@ -44,7 +44,7 @@ func (ui *UI) Execute(line string) error {
 		if len(words[0]) > 0 && words[0][0] == '/' {
 			words[0] = words[0][1:]
 		} else {
-			ui.SendMessage(line)
+			ui.CurrentContact.Conversation.SendMessage(line)
 			return nil
 		}
 	}
@@ -137,32 +137,6 @@ func (ui *UI) PrintStatus() {
 	// unread messages
 }
 
-func (ui *UI) PrintMessage(contact *Contact, outbound bool, text string) {
-	if contact == ui.CurrentContact {
-		if outbound {
-			fmt.Fprintf(ui.Input.Stdout(), "\r%s > %s\n", contact.Data.Nickname, text)
-		} else {
-			fmt.Fprintf(ui.Input.Stdout(), "\r%s < %s\n", contact.Data.Nickname, text)
-		}
-	} else if !outbound {
-		fmt.Fprintf(ui.Input.Stdout(), "\r---- %s < %s\n", contact.Data.Nickname, text)
-	}
-}
-
-func (ui *UI) SendMessage(text string) {
-	_, err := ui.Client.Backend.SendMessage(context.Background(), &ricochet.Message{
-		Sender: &ricochet.Entity{IsSelf: true},
-		Recipient: &ricochet.Entity{
-			ContactId: ui.CurrentContact.Data.Id,
-			Address:   ui.CurrentContact.Data.Address,
-		},
-		Text: text,
-	})
-	if err != nil {
-		fmt.Printf("send message error: %v\n", err)
-	}
-}
-
 func (ui *UI) ListContacts() {
 	byStatus := make(map[ricochet.Contact_Status][]*Contact)
 	for _, contact := range ui.Client.Contacts.Contacts {
@@ -190,10 +164,12 @@ func (ui *UI) SetCurrentContact(contact *Contact) {
 	ui.CurrentContact = contact
 	if ui.CurrentContact != nil {
 		config := *ui.Input.Config
-		config.Prompt = fmt.Sprintf("%s > ", contact.Data.Nickname)
+		config.Prompt = fmt.Sprintf("\x1b[90m00:00\x1b[39m | %s \x1b[34m<<\x1b[39m ", contact.Data.Nickname)
 		config.UniqueEditLine = true
 		ui.Input.SetConfig(&config)
 		fmt.Printf("--- %s (%s) ---\n", contact.Data.Nickname, strings.ToLower(contact.Data.Status.String()))
+		contact.Conversation.PrintContext()
+		contact.Conversation.MarkAsRead()
 	} else {
 		config := *ui.Input.Config
 		config.Prompt = "> "

rpc/core.proto

@@ -26,6 +26,8 @@ service RicochetCore {
     rpc StopNetwork (StopNetworkRequest) returns (NetworkStatus);
 
     // XXX Config (tor, etc)
+    // XXX Protobuf supports maps now. That could also be useful for contact
+    // update and such...
 
     // XXX Service status
     rpc GetIdentity (IdentityRequest) returns (Identity);