Adding middleware to talk to rasa core and get back responses. Works …

src/botkitRasaCore.js

@@ -0,0 +1,58 @@
+const request = require('request-promise')
+const debug = require('debug')('botkit:rasa')
+
+module.exports = config => {
+  if (!config) {
+    config = {}
+  }
+
+  if (!config.rasa_uri) {
+    config.rasa_uri = 'http://localhost:5000'
+  }
+
+  var middleware = {
+    receive: (bot, message, next) => {
+      if (!message.text || message.is_echo) {
+        next()
+        return
+      }
+
+      debug('Sending message to Rasa', message.text)
+      const options = {
+        method: 'POST',
+        uri: `${config.rasa_uri}/conversations/default/respond`,
+        body: {
+          query: message.text
+        },
+        json: true
+      }
+
+      request(options)
+        .then(response => {
+          debug('Rasa response', response)
+          if(response && response[0]) {
+            var coreResponse = JSON.stringify(response[0])
+            var parsedResponse = JSON.parse(coreResponse)
+            message.recipient_id = response.recipient_id
+            message.text = response.text
+          }
+          else {
+            message.recipient_id = 'default'
+            message.text = 'Sorry, the bot could not parse the response'
+          }
+          next()
+        })
+    },
+
+    hears: (patterns, message) => {
+      return patterns.some(pattern => {
+        if (message.recipient_id === 'default') {
+          debug('Rasa core response matched the recipient id', message.recipient_id, pattern)
+          return true
+        }
+      })
+    }
+
+  }
+  return middleware
+}