Resume conversation

Per https://github.com/Microsoft/BotFramework-WebChat/issues/353, it would be useful to resume a conversation in progress. Let’s talk about how this could happen.

First of all we’d need the conversationId of the previous conversation. @dandriscoll can we depend on this remaining valid?

Instead of calling /conversation we call /conversations/{conversationId}, which would give us a current streamUrl. I guess if this call fails we know the conversationId is no longer valid.

We could also optionally supply a watermark. If we don’t we’d get all the cached messages Direct Line might still be holding, which would sometimes be desirable.

Then business would resume as normal.

From an API perspective we’d just need to add conversationId?: string and watermark?: string to DirectLineOptions.

You might ask, how do we get the conversationId/watermark from the previous conversation? Well it’s inside the DirectLine object. So the hosting page could create a DirectLine object, e.g.

const dl = new DirectLine({
    secret: your_direct_line_secret // or token: your_direct_line_token
});

and then save dl.conversationId and dl.watermark to a cookie, or local storage, or its server, etc. Then when reconstituting it, it would do:

const dl = new DirectLine({
    secret: your_direct_line_secret, // or token: your_direct_line_token
    conversationId: from_previous_conversation,
    watermark: from_previous_converation
})

Am I missing anything?

[baki32]

You can get it from directline object

var **directLine** = new DirectLine({
    secret: /* put your Direct Line secret here */,
    token: /* or put your Direct Line token here (supply secret OR token, not both) */,
    domain: /* optional: if you are not using the default Direct Line endpoint, e.g. if you are using a region-specific endpoint, put its full URL here */
    webSocket: /* optional: false if you want to use polling GET to receive messages. Defaults to true (use WebSocket). */,
    pollingInterval: /* optional: set polling interval in milliseconds. Default to 1000 */,
});

You then pass it to webchat

BotChat.App({
    botConnection: **directLine**,
    user: user
    ...
}, document.getElementById("BotChatGoesHere"));

and then when connection is established

**directLine**.connectionStatus$
.subscribe(connectionStatus => {
    switch(connectionStatus) {
        case 2:{
             //conversationId
             var id = **directLine**.conversationId
        }       
});

[baki32]

That code is used when initializing webchat object in HTML refer to : Advanced Web Chat chapter here https://github.com/Microsoft/BotFramework-WebChat/blob/master/README.md

Sent from my Windows 10 device

---

From: Kostas Setzas [e-mail] Sent: Wednesday, October 17, 2018 5:03:20 PM To: Microsoft/BotFramework-DirectLineJS Cc: baki32; Mention Subject: Re: [Microsoft/BotFramework-DirectLineJS] Resume conversation (#9)

@baki32https://github.com/baki32 @sevetseh28https://github.com/sevetseh28 I still cannot get it. Do you put the lines above into the same script?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/Microsoft/BotFramework-DirectLineJS/issues/9#issuecomment-430665177, or mute the threadhttps://github.com/notifications/unsubscribe-auth/AVyIloHj_Q5a7GEVh4WHFsr-4s65oGx5ks5ul0aegaJpZM4MPwXk.