Add auth check to LivestreamerService

and implement ModalAuthRequiredComponent.
See #310

src/app/app.js

@@ -143,6 +143,7 @@ import ModalConfirmComponent from "components/modal/ModalConfirmComponent";
 import ModalFirstrunComponent from "components/modal/ModalFirstrunComponent";
 import ModalFooterComponent from "components/modal/ModalFooterComponent";
 import ModalHeaderComponent from "components/modal/ModalHeaderComponent";
+import ModalAuthRequiredComponent from "components/modal/ModalAuthRequiredComponent";
 import ModalLivestreamerComponent from "components/modal/ModalLivestreamerComponent";
 import ModalLogComponent from "components/modal/ModalLogComponent";
 import ModalNewreleaseComponent from "components/modal/ModalNewreleaseComponent";
@@ -443,6 +444,7 @@ export default Application.create({
 	ModalFirstrunComponent,
 	ModalFooterComponent,
 	ModalHeaderComponent,
+	ModalAuthRequiredComponent,
 	ModalLivestreamerComponent,
 	ModalLogComponent,
 	ModalNewreleaseComponent,

src/app/components/modal/ModalAuthRequiredComponent.js

@@ -0,0 +1,19 @@
+import ModalDialogComponent from "components/modal/ModalDialogComponent";
+import layout from "templates/components/modal/ModalAuthRequiredComponent.hbs";
+
+
+export default ModalDialogComponent.extend({
+	layout,
+
+	"class": "modal-auth-required",
+
+	goto: "goto",
+
+
+	actions: {
+		login() {
+			this.sendAction( "goto", "user.auth" );
+			this.send( "close" );
+		}
+	}
+});

src/app/services/LivestreamerService.js

@@ -95,6 +95,7 @@ function setIfNotNull( objA, objB, key ) {
 
 
 export default Service.extend( ChannelSettingsMixin, {
+	auth: service(),
 	chat: service(),
 	modal: service(),
 	settings: service(),
@@ -110,6 +111,10 @@ export default Service.extend( ChannelSettingsMixin, {
 
 
 	startStream( stream, quality ) {
+		if ( !get( this, "auth.session.isLoggedIn" ) ) {
+			return get( this, "modal" ).openModal( "authRequired" );
+		}
+
 		get( this, "modal" ).openModal( "livestreamer", this, {
 			error : null,
 			active: null,

src/templates/components/modal/ModalAuthRequiredComponent.hbs

@@ -0,0 +1,12 @@
+<div>
+	{{#modal-header}}
+		Authentication required
+	{{/modal-header}}
+	{{#modal-body}}
+		Please sign in to your Twitch.tv account to be able to launch streams.
+	{{/modal-body}}
+	{{#modal-footer}}
+		{{#form-button action="login" class="btn-success" icon="fa-sign-in"}}Sign in{{/form-button}}
+		{{#form-button action="close" class="btn-danger"  icon="fa-times"  }}Close{{/form-button}}
+	{{/modal-footer}}
+</div>