allow say verb failed as NonFatalTaskError for File Not Found (#1443)

* allow say verb failed as NonFatalTaskError for File Not Found

* wip

lib/tasks/say.js

@@ -2,8 +2,9 @@ const assert = require('assert');
 const TtsTask = require('./tts-task');
 const {TaskName, TaskPreconditions} = require('../utils/constants');
 const pollySSMLSplit = require('polly-ssml-split');
-const { SpeechCredentialError } = require('../utils/error');
+const { SpeechCredentialError, NonFatalTaskError } = require('../utils/error');
 const { sleepFor } = require('../utils/helpers');
+const { NON_FANTAL_ERRORS } = require('../utils/constants.json');
 
 /**
  * Discard unmatching responses:
@@ -402,11 +403,19 @@ class TaskSay extends TtsTask {
             this._playResolve = resolve;
             this._playReject = reject;
           });
+          try {
             const r = await ep.play(filename);
             this.logger.debug({r}, 'Say:exec play result');
             if (r.playbackSeconds == null && r.playbackMilliseconds == null && r.playbackLastOffsetPos == null) {
               this._playReject(new Error('Playback failed to start'));
             }
+          } catch (err) {
+            if (NON_FANTAL_ERRORS.includes(err.message)) {
+              throw new NonFatalTaskError(err.message);
+            }
+            throw err;
+          }
+
           try {
             // wait for playback-stop event received to confirm if the playback is successful
             await this._playPromise;

lib/utils/constants.json

@@ -356,5 +356,8 @@
   "WS_CLOSE_CODES": {
     "NormalClosure": 1000,
     "GoingAway": 1001
-  }
+  },
+  "NON_FANTAL_ERRORS": [
+    "File Not Found"
+  ]
 }