Merge pull request #231 from browngraphicslab/speech-to-text

Speech to text

1 files changed, 39 insertions, 0 deletions

diff --git a/src/client/util/DictationManager.ts b/src/client/util/DictationManager.ts
new file mode 100644
index 000000000..b58bdb6c7
--- /dev/null
+++ b/src/client/util/DictationManager.ts
@@ -0,0 +1,39 @@
+namespace CORE {
+    export interface IWindow extends Window {
+        webkitSpeechRecognition: any;
+    }
+}
+
+const { webkitSpeechRecognition }: CORE.IWindow = window as CORE.IWindow;
+
+export default class DictationManager {
+    public static Instance = new DictationManager();
+    private isListening = false;
+    private recognizer: any;
+
+    constructor() {
+        this.recognizer = new webkitSpeechRecognition();
+        this.recognizer.interimResults = false;
+        this.recognizer.continuous = true;
+    }
+
+    finish = (handler: any, data: any) => {
+        handler(data);
+        this.isListening = false;
+        this.recognizer.stop();
+    }
+
+    listen = () => {
+        if (this.isListening) {
+            return undefined;
+        }
+        this.isListening = true;
+        this.recognizer.start();
+        return new Promise<string>((resolve, reject) => {
+            this.recognizer.onresult = (e: any) => this.finish(resolve, e.results[0][0].transcript);
+            this.recognizer.onerror = (e: any) => this.finish(reject, e);
+        });
+
+    }
+
+}
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