Adding POC lastfm authorization button

src/js/components/LastfmAuthenticationFrame.js

@@ -0,0 +1,123 @@
+
+import React, { PropTypes } from 'react'
+import { connect } from 'react-redux'
+import { createStore, bindActionCreators } from 'redux'
+import ReactGA from 'react-ga'
+
+import FontAwesome from 'react-fontawesome'
+import Thumbnail from './Thumbnail'
+
+import * as uiActions from '../services/ui/actions'
+import * as lastfmActions from '../services/lastfm/actions'
+
+class LastfmAuthenticationFrame extends React.Component{
+
+	constructor(props){
+		super(props);
+
+		this.state = {
+			authorizing: false
+		}
+	}
+
+	componentDidMount(){
+
+		let self = this;
+
+		// Listen for incoming messages from the authorization iframe
+		// This is triggered when the popup posts a message, which is then passed to
+		// the iframe, and then passed on to the parent frame (our application)
+		window.addEventListener('message', function(event){
+			self.handleMessage(event)
+		}, false);
+	}
+
+	handleMessage(event){
+
+		var data = JSON.parse(event.data)
+				
+		// Only allow incoming data from our authorized authenticator proxy
+		var authorization_domain = this.props.authorization_url.substring(0,this.props.authorization_url.indexOf('/',8))
+		if (event.origin != authorization_domain){
+			this.props.uiActions.createNotification('Authorization failed. '+event.origin+' is not the configured authorization_url.','bad')
+			return false
+		}
+
+		// Bounced with an error
+		if (typeof(data.error) !== 'undefined'){
+			this.props.uiActions.createNotification(data.error,'bad')
+
+		// No errors? We're in!
+		} else {
+			this.props.lastfmActions.authorizationGranted(data)
+			//this.props.lastfmActions.getMe()
+		}
+
+		// Turn off our authorizing switch
+		this.setState({authorizing: false})	
+	}
+
+	startAuthorization(){
+
+		var self = this
+		this.setState({authorizing: true})
+
+		// Open an authentication request window
+		var url = this.props.authorization_url+'?action=authorize'
+		var popup = window.open(url,"popup","height=500,width=350");
+
+		// Start timer to check our popup's state
+		var timer = setInterval(checkPopup, 1000);
+        function checkPopup(){
+
+        	// Popup has been closed
+            if (typeof(popup) !== 'undefined' && popup){
+                if (popup.closed){
+					self.setState({authorizing: false})
+                    clearInterval(timer);
+                }
+
+            // Popup does not exist, so must have been blocked
+            } else {
+				self.props.uiActions.createNotification('Popup blocked. Please allow popups and try again.','bad')
+				self.setState({authorizing: false})
+                clearInterval(timer);
+            }
+        }
+	}
+
+	render(){
+		if (this.state.authorizing){
+			return (
+				<button className="working">
+					Authorizing...
+				</button>
+			)
+		} else if (this.props.authorized){
+			return (
+				<button className="destructive" onClick={() => this.props.lastfmActions.revokeAuthorization()}>Log out</button>
+			)
+		} else {
+			return (
+				<button className="primary" onClick={() => this.startAuthorization()}>Log in</button>
+			)
+		}
+	}
+}
+
+const mapStateToProps = (state, ownProps) => {
+	return {
+		authorization_url: state.lastfm.authorization_url,
+		authorized: state.lastfm.authorization,
+		authorizing: state.lastfm.authorizing
+	}
+}
+
+const mapDispatchToProps = (dispatch) => {
+	return {
+		uiActions: bindActionCreators(uiActions, dispatch),
+		lastfmActions: bindActionCreators(lastfmActions, dispatch)
+	}
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(LastfmAuthenticationFrame)