added BrowserHelper

implemented open Spotify auth page

src/main/java/de/b00tload/tools/lastfmtospotifyplaylist/LastFMToSpotify.java

@@ -4,6 +4,7 @@ package de.b00tload.tools.lastfmtospotifyplaylist;
 import com.neovisionaries.i18n.CountryCode;
 import de.b00tload.tools.lastfmtospotifyplaylist.arguments.ArgumentHandler;
 import de.b00tload.tools.lastfmtospotifyplaylist.arguments.Arguments;
+import de.b00tload.tools.lastfmtospotifyplaylist.util.BrowserHelper;
 import de.b00tload.tools.lastfmtospotifyplaylist.util.PeriodHelper;
 
 import de.b00tload.tools.lastfmtospotifyplaylist.util.TokenHelper;
@@ -100,7 +101,12 @@ public class LastFMToSpotify {
                         }
                     });
                     logLn("Waiting for Spotify authorization.", 1);
-                    //TODO: Open auth page in Browser
+                    
+                    String authPage = "https://accounts.spotify.com/authorize?client_id="
+                        + configuration.get("spotify.clientid")
+                        + "&response_type=code&state=73775e18-b0bc-4031-a379-bce99a0e3e6c&redirect_uri=http%3A%2F%2Flocalhost%3A9876%2Fcallback%2Fspotify%2F&scope=user-read-private%20playlist-modify-private%20playlist-modify-public%20ugc-image-upload%20playlist-read-private%20playlist-read-collaborative";
+                    BrowserHelper.openInBrowser(authPage);
+
                     while (waiting.get());
                 }
             }

src/main/java/de/b00tload/tools/lastfmtospotifyplaylist/util/BrowserHelper.java

@@ -0,0 +1,42 @@
+package de.b00tload.tools.lastfmtospotifyplaylist.util;
+
+public class BrowserHelper {
+    
+    /**
+     * Opens a <code>url</code> in the systems default browser
+     * @param url
+     */
+    public static void openInBrowser(String url) {
+
+        String os = System.getProperty("os.name").toLowerCase();
+        ProcessBuilder builder;
+
+        if (os.indexOf("win") >= 0) {
+            // Windows
+            builder = new ProcessBuilder("rundll32.exe","url.dll,FileProtocolHandler", url);
+        } else if (os.indexOf("mac") >= 0) {
+            // Mac
+            builder = new ProcessBuilder("open", url);
+        } else if (os.indexOf("nix") >= 0 || os.indexOf("nux") >= 0) {
+            // Linux
+            os = "linux";
+            builder = new ProcessBuilder("xdg-open", url);
+        } else {
+            Logger.logLn("Please open the following link:\n"+url, 1);
+            builder = null;
+        }
+        
+        try {
+            if (builder != null) {
+                Process exec = builder.start();
+                if (os.equals("linux") && exec.exitValue() == 3) {
+                    // on Linux in case of missing browser
+                    Logger.logLn("Please open the following link:\n"+url, 1);
+                }
+            }
+        } catch (Exception e) {
+            Logger.logLn(e.getMessage(), 3);
+        }
+
+    }
+}