add sms messaging support

lib/tasks/message.js

@@ -0,0 +1,57 @@
+const Task = require('./task');
+const {TaskName, TaskPreconditions} = require('../utils/constants');
+const bent = require('bent');
+
+class TaskMessage extends Task {
+  constructor(logger, opts) {
+    super(logger, opts);
+    this.preconditions = TaskPreconditions.None;
+
+    this.payload = {
+      provider: this.data.provider,
+      to: this.data.to,
+      from: this.data.from,
+      cc: this.data.cc,
+      text: this.data.text,
+      media: this.data.media
+    };
+
+  }
+
+  get name() { return TaskName.Message; }
+
+  /**
+   * Send outbound SMS
+   */
+  async exec(cs, dlg) {
+    const {srf} = cs;
+    await super.exec(cs);
+    try {
+      const {getSBC} = srf.locals;
+      const sbcAddress = getSBC();
+      if (sbcAddress) {
+        const url = `http://${sbcAddress}:3000/`;
+        const post = bent(url, 'POST', 'json', 200);
+        this.logger.info({payload: this.payload, sbcAddress}, 'Message:exec sending outbound SMS');
+        const response = await post('v1/outboundSMS', this.payload);
+        this.logger.info({response}, 'Successfully sent SMS');
+        if (cs.callInfo.res) {
+          this.logger.info('Message:exec sending 200 OK response to HTTP POST from api server');
+          cs.callInfo.res.status(200).json({
+            sid: cs.callInfo.messageSid,
+            providerResponse: response
+          });
+        }
+
+        // TODO: action Hook
+      }
+      else {
+        this.logger.info('Message:exec - unable to send SMS as there are no available SBCs');
+      }
+    } catch (err) {
+      this.logger.error(err, 'TaskMessage:exec - Error sending SMS');
+    }
+  }
+}
+
+module.exports = TaskMessage;