Throw errors on missing voice dependencies

lib/Voice/VoiceConnection.js

@@ -233,15 +233,13 @@ var VoiceConnection = (function (_EventEmitter) {
 		try {
 			if (!self.encoder.opus) {
 				self.playing = false;
-				self.emit("error", "No Opus!");
+				throw new Error("node-opus not found! Perhaps you didn't install it.");
-				self.client.emit("debug", "Tried to use node-opus, but opus not available - install it!");
 				return;
 			}
 
 			if (!self.encoder.sanityCheck()) {
 				self.playing = false;
-				self.emit("error", "Opus sanity check failed!");
+				throw new Error("node-opus sanity check failed! Try re-installing node-opus.");
-				self.client.emit("debug", "Opus sanity check failed - opus is installed but not correctly! Please reinstall opus and make sure it's installed correctly.");
 				return;
 			}
 

lib/Voice/VoicePacket.js

@@ -2,13 +2,14 @@
 
 exports.__esModule = true;
 
-function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
-
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-var _tweetnacl = require("tweetnacl");
+var nacl;
-
+try {
-var _tweetnacl2 = _interopRequireDefault(_tweetnacl);
+	nacl = require("tweetnacl");
+} catch (e) {
+	// no tweetnacl!
+}
 
 var nonce = new Buffer(24);
 nonce.fill(0);
@@ -16,6 +17,9 @@ nonce.fill(0);
 var VoicePacket = function VoicePacket(data, sequence, time, ssrc, secret) {
 	_classCallCheck(this, VoicePacket);
 
+	if (!nacl) {
+		throw new Error("tweetnacl not found! Perhaps you didn't install it.");
+	}
 	var mac = secret ? 16 : 0;
 	var packetLength = data.length + 12 + mac;
 
@@ -33,7 +37,7 @@ var VoicePacket = function VoicePacket(data, sequence, time, ssrc, secret) {
 	if (secret) {
 		// copy first 12 bytes
 		returnBuffer.copy(nonce, 0, 0, 12);
-		audioBuffer = _tweetnacl2["default"].secretbox(data, nonce, secret);
+		audioBuffer = nacl.secretbox(data, nonce, secret);
 	}
 
 	for (var i = 0; i < audioBuffer.length; i++) {

src/Voice/VoiceConnection.js

@@ -197,15 +197,13 @@ export default class VoiceConnection extends EventEmitter {
 		try {
 			if (!self.encoder.opus){
 				self.playing=false;
-				self.emit("error", "No Opus!");
+				throw new Error("node-opus not found! Perhaps you didn't install it.");
-				self.client.emit("debug", "Tried to use node-opus, but opus not available - install it!");
 				return;
 			}
 
 			if (!self.encoder.sanityCheck()) {
 				self.playing = false;
-				self.emit("error", "Opus sanity check failed!");
+				throw new Error("node-opus sanity check failed! Try re-installing node-opus.");
-				self.client.emit("debug", "Opus sanity check failed - opus is installed but not correctly! Please reinstall opus and make sure it's installed correctly.");
 				return;
 			}
 

src/Voice/VoicePacket.js

@@ -1,12 +1,20 @@
 "use strict";
 
-import nacl from "tweetnacl";
+var nacl;
+try {
+	nacl = require("tweetnacl");
+} catch (e) {
+	// no tweetnacl!
+}
 
 const nonce = new Buffer(24);
 nonce.fill(0);
 
 export default class VoicePacket {
 	constructor(data, sequence, time, ssrc, secret){
+		if(!nacl) {
+			throw new Error("tweetnacl not found! Perhaps you didn't install it.");
+		}
 		var mac = secret ? 16 : 0;
 		var packetLength = data.length + 12 + mac;