Add support for logging in and out by command line

README.md

@@ -47,7 +47,6 @@ these steps to setup the project directory.
 
   ```
   ./gradlew idea
-  ./gradlew genIntellijRuns
   ```
 2.  Open the project folder with Intellij, and import the Gradle project
   when prompted.
@@ -83,6 +82,20 @@ followed by *Other* for the Application type.
 4.  Download the json credentials by clicking the following icon for your
   project: ![Download json](download_json.png)
 
+5.  Run the YouTube Chat jar from a terminal to obtain authorization credentials,
+pasting the client ID JSON when prompted:
+
+```
+java -jar ytchat-1.0.3.jar login
+```
+
+If you want to clear your credentials or sign in as a different user, run logout:
+
+```
+java -jar ytchat-1.0.3.jar logout
+```
+
+Credentials are be saved to ~/.oauth-credentials.
 
 ## Configuration
 

dependencies.txt

@@ -28,6 +28,9 @@ task saveDependencies << {
 }
 
 jar {
+    manifest {
+        attributes 'Main-Class': 'com.google.youtube.gaming.chat.Main'
+    }
     from configurations.embed.collect {
         exclude 'META-INF/LICENSE*'
         exclude 'META-INF/NOTICE*'

setup.gradle

@@ -46,7 +46,7 @@ task updateMdk(dependsOn: 'stageMdk') {
         String text = buildGradle.getText('UTF-8')
         text = text.replaceAll('com.yourname.modid', 'com.google.youtube.ytchat')
         text = text.replaceAll('modid', 'ytchat')
-        text = text.replaceAll('1\\.0', '1.0.2')
+        text = text.replaceAll('1\\.0', '1.0.3')
         text = text.replace('repositories {', 'repositories {\n        mavenCentral()');
         text = text.replaceFirst(/\ndependencies\s?\{[^\}]+\}/, dependencyText);
         buildGradle.write(text, 'UTF-8')

src/main/java/com/google/youtube/gaming/chat/Auth.java

@@ -31,10 +31,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.StringReader;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.util.Collection;
-import org.apache.commons.io.FileUtils;
 
 /**
  * Contains methods for authorizing a user and caching credentials.
@@ -84,10 +81,24 @@ public static Credential authorize(
   public static void clearCredentials() throws IOException {
     File directory = new File(getCredentialsDirectory());
     if (directory.exists()) {
-      FileUtils.deleteDirectory(directory);
+      deleteDirectory(directory);
     }
   }
 
+  private static boolean deleteDirectory(File path) {
+    if (path.exists()) {
+      File[] files = path.listFiles();
+      for(int i=0; i < files.length; i++) {
+        if(files[i].isDirectory()) {
+          deleteDirectory(files[i]);
+        } else {
+          files[i].delete();
+        }
+      }
+    }
+    return path.delete();
+  }
+
   private static String getCredentialsDirectory() {
     return System.getProperty("user.home") + "/" + CREDENTIALS_DIRECTORY;
   }

src/main/java/com/google/youtube/gaming/chat/Main.java

@@ -0,0 +1,54 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+
+package com.google.youtube.gaming.chat;
+
+import com.google.api.services.youtube.YouTubeScopes;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Main {
+  public static void main(String[] args) throws IOException {
+    if (args.length == 0) {
+      showUsage();
+      return;
+    }
+
+    switch (args[0]) {
+      case "login":
+        System.out.print("Paste the client ID JSON from the Google API console:");
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        String clientSecret = br.readLine();
+        List<String> scopes = new ArrayList<String>();
+        scopes.add(YouTubeScopes.YOUTUBE_FORCE_SSL);
+        scopes.add(YouTubeScopes.YOUTUBE);
+        Auth.authorize(scopes, clientSecret, YouTubeChat.MODID);
+        break;
+      case "logout":
+        Auth.clearCredentials();
+        break;
+      default:
+        showUsage();
+    }
+  }
+
+  private static void showUsage() {
+    System.err.println("Supported arguments: login | logout");
+  }
+}

src/main/java/com/google/youtube/gaming/chat/YouTubeChat.java

@@ -30,7 +30,7 @@
 public class YouTubeChat {
   public static final String MODID = "ytchat";
   public static final String APPNAME = "YouTube Chat";
-  public static final String VERSION = "1.0.2";
+  public static final String VERSION = "1.0.3";
   public static final String GUI_FACTORY =
       "com.google.youtube.gaming.chat.YouTubeConfigurationGuiFactory";