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exceed.js
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exceed.js
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var path = require('path');
var util = require('util');
var express = require('express');
var builder = require('botbuilder');
var GraphDialog = require('bot-graph-dialog');
var request = require('request-promise');
var config = require('./config');
var fs = require('fs');
var port = process.env.PORT || 3978;
var app = express();
var microsoft_app_id = config.get('MICROSOFT_APP_ID');
var microsoft_app_password = config.get('MICROSOFT_APP_PASSWORD');
var connector = new builder.ChatConnector({
appId: microsoft_app_id,
appPassword: microsoft_app_password,
});
var bot = new builder.UniversalBot(connector).set('storage', builder.MemoryBotStorage());
// an implementation of the Navigator interface
// which will act as the proxy for the backend API
class ProxyNavigator {
constructor() {
// backend root URL
this.apiUrl = "http://86d54bb8.ngrok.io/api/msBotFramework";
}
// returns the current node of the dialog
async getCurrentNode(session) {
console.log(`getCurrentNode, message: ${JSON.stringify(session.message, true, 2)}`);
var node;
if (session.privateConversationData._currentNode) {
try {
node = JSON.parse(session.privateConversationData._currentNode);
}
catch(err) {
console.error(`error parsing current node json: ${session.privateConversationData._currentNode}`);
}
}
if (!node) {
node = await this.getNextNode(session);
}
// in case of a node with a few steps (internal nodes)
var internalIndex = session.privateConversationData._currInternalIndex;
if (node && node.steps && !isNaN(internalIndex)) {
node = node.steps[internalIndex];
}
return node;
};
// resolves the next node in the dialog
async getNextNode(session) {
console.log(`getNextNode, message: ${JSON.stringify(session.message, true, 2)}`);
var node;
if (session.privateConversationData._currentNode) {
try {
node = JSON.parse(session.privateConversationData._currentNode);
}
catch(err) {
console.error(`error parsing current node json: ${session.privateConversationData._currentNode}`);
}
}
if (node && node.steps) {
var internalIndex = session.privateConversationData._currInternalIndex;
internalIndex = isNaN(internalIndex) ? 0 : internalIndex + 1;
if (internalIndex > node.steps.length - 1) {
// get next node from remote api
return await this.resolveNextRemoteNode(session);
}
session.privateConversationData._currInternalIndex = internalIndex;
return node.steps[internalIndex];
}
return await this.resolveNextRemoteNode(session);
};
async resolveNextRemoteNode(session) {
var body = {
message: session.message
};
// add the resolved value from the bot-graph-dialog.
// in case of a 'time' prompt- "2 days ago" will be resolved to the
// actual date 2 days ago
if (session.privateConversationData._lastResolvedResult) {
body.resolved = session.privateConversationData._lastResolvedResult;
}
var node = await this.callApi({
uri: this.apiUrl + '/message',
body,
method: 'POST',
json: true
});
delete session.privateConversationData._currInternalIndex;
if (!node.steps) {
node = {
type: 'sequence',
steps: [ node ]
}
}
node.steps[node.steps.length - 1].stop = true;
session.privateConversationData._currInternalIndex = 0;
session.privateConversationData._currentNode = node ? JSON.stringify(node) : null;
node = node.steps[0];
return node;
}
// calls the remote API
async callApi(opts) {
console.log(`invoking http call: ${util.inspect(opts)}`);
try {
var result = await request(opts);
}
catch(err) {
console.error(`error invoking request: ${err.message}, opts: ${opts}`);
return;
}
console.log(`got result: ${util.inspect(result)}`);
return result.response;
}
}
process.nextTick(async () => {
var navigator = new ProxyNavigator();
var graphDialog = await GraphDialog.create({ bot, navigator, proxyMode: true });
bot.dialog('/', graphDialog.getDialog());
console.log(`proxy graph dialog loaded successfully`);
});
app.post('/api/messages', connector.listen());
app.listen(port, () => {
console.log('listening on port %s', port);
});