Create UserAccountManager and move getAccounts()

Signed-off-by: Chris Narkiewicz <hello@ezaquarii.com>

Author: ezaquarii

findbugs-filter.xml

@@ -22,4 +22,7 @@
     </Match>
     <Bug pattern="PATH_TRAVERSAL_IN" />
     <Bug pattern="ANDROID_EXTERNAL_FILE_ACCESS" />
+
+    <!-- This is unmanageable for now dur to large amount of interconnected static state -->
+    <Bug pattern="FCCD_FIND_CLASS_CIRCULAR_DEPENDENCY"/>
 </FindBugsFilter>

src/generic/java/com/nextcloud/client/di/VariantComponentsModule.java

@@ -0,0 +1,26 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ * Copyright (C) 2919 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.nextcloud.client.di;
+
+import dagger.Module;
+
+@Module
+abstract class VariantComponentsModule {
+}

src/generic/java/com/owncloud/android/utils/PushUtils.java

@@ -2,7 +2,9 @@
  * Nextcloud Android client application
  *
  * @author Mario Danic
+ * @author Chris Narkiewicz
  * Copyright (C) 2017 Mario Danic
+ * Copyright (C) 2019 Chris Narkiewicz
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -22,6 +24,7 @@
 
 import android.content.Context;
 
+import com.nextcloud.client.account.UserAccountManager;
 import com.owncloud.android.MainApp;
 import com.owncloud.android.datamodel.SignatureVerification;
 import com.nextcloud.client.preferences.AppPreferencesImpl;
@@ -34,11 +37,11 @@ public final class PushUtils {
     private PushUtils() {
     }
 
-    public static void pushRegistrationToServer(final String pushToken) {
+    public static void pushRegistrationToServer(final UserAccountManager accountManager, final String pushToken) {
         // do nothing
     }
 
-    public static void reinitKeys() {
+    public static void reinitKeys(UserAccountManager accountManager) {
         Context context = MainApp.getAppContext();
         AppPreferencesImpl.fromContext(context).setKeysReInitEnabled();
     }
@@ -47,7 +50,12 @@ public static Key readKeyFromFile(boolean readPublicKey) {
         return null;
     }
 
-    public static SignatureVerification verifySignature(Context context, byte[] signatureBytes, byte[] subjectBytes) {
+    public static SignatureVerification verifySignature(
+        final Context context,
+        final UserAccountManager accountManager,
+        final byte[] signatureBytes,
+        final byte[] subjectBytes
+    ) {
         return null;
     }
 

src/gplay/java/com/nextcloud/client/di/VariantComponentsModule.java

@@ -0,0 +1,30 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ * Copyright (C) 2919 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.nextcloud.client.di;
+
+import com.owncloud.android.services.firebase.NCFirebaseInstanceIDService;
+
+import dagger.Module;
+import dagger.android.ContributesAndroidInjector;
+
+@Module
+abstract class VariantComponentsModule {
+    @ContributesAndroidInjector abstract NCFirebaseInstanceIDService ncFirebaseInstanceIDService();
+}

src/gplay/java/com/owncloud/android/services/firebase/NCFirebaseInstanceIDService.java

@@ -23,27 +23,33 @@
 
 import com.google.firebase.iid.FirebaseInstanceId;
 import com.google.firebase.iid.FirebaseInstanceIdService;
+import com.nextcloud.client.account.UserAccountManager;
 import com.nextcloud.client.preferences.AppPreferences;
-import com.nextcloud.client.preferences.AppPreferencesImpl;
 import com.owncloud.android.R;
 import com.owncloud.android.utils.PushUtils;
 
+import javax.inject.Inject;
+
+import dagger.android.AndroidInjection;
+
 public class NCFirebaseInstanceIDService extends FirebaseInstanceIdService {
 
-    private AppPreferences preferences;
+
+    @Inject AppPreferences preferences;
+    @Inject UserAccountManager accountManager;
 
     @Override
     public void onCreate() {
         super.onCreate();
-        preferences = AppPreferencesImpl.fromContext(this);
+        AndroidInjection.inject(this);
     }
 
     @Override
     public void onTokenRefresh() {
         //You can implement this method to store the token on your server
         if (!TextUtils.isEmpty(getResources().getString(R.string.push_server_url))) {
             preferences.setPushToken(FirebaseInstanceId.getInstance().getToken());
-            PushUtils.pushRegistrationToServer(preferences.getPushToken());
+            PushUtils.pushRegistrationToServer(accountManager, preferences.getPushToken());
         }
     }
 }

src/gplay/java/com/owncloud/android/utils/PushUtils.java

@@ -2,7 +2,9 @@
  * Nextcloud Android client application
  *
  * @author Mario Danic
+ * @author Chris Narkiewicz
  * Copyright (C) 2017-2018 Mario Danic
+ * Copyright (C) 2019 Chris Narkiewicz
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -29,6 +31,7 @@
 import android.util.Log;
 
 import com.google.gson.Gson;
+import com.nextcloud.client.account.UserAccountManager;
 import com.nextcloud.client.preferences.AppPreferences;
 import com.nextcloud.client.preferences.AppPreferencesImpl;
 import com.owncloud.android.MainApp;
@@ -194,7 +197,7 @@ private static void deleteRegistrationForAccount(Account account) {
         }
     }
 
-    public static void pushRegistrationToServer(final String token) {
+    public static void pushRegistrationToServer(final UserAccountManager accountManager, final String token) {
         arbitraryDataProvider = new ArbitraryDataProvider(MainApp.getAppContext().getContentResolver());
 
         if (!TextUtils.isEmpty(MainApp.getAppContext().getResources().getString(R.string.push_server_url)) &&
@@ -213,7 +216,7 @@ public static void pushRegistrationToServer(final String token) {
                 String providerValue;
                 PushConfigurationState accountPushData = null;
                 Gson gson = new Gson();
-                for (Account account : AccountUtils.getAccounts(context)) {
+                for (Account account : accountManager.getAccounts()) {
                     providerValue = arbitraryDataProvider.getValue(account, KEY_PUSH);
                     if (!TextUtils.isEmpty(providerValue)) {
                         accountPushData = gson.fromJson(providerValue,
@@ -359,9 +362,9 @@ private static int saveKeyToFile(Key key, String path) {
         return -1;
     }
 
-    public static void reinitKeys() {
+    public static void reinitKeys(final UserAccountManager accountManager) {
         Context context = MainApp.getAppContext();
-        Account[] accounts = AccountUtils.getAccounts(context);
+        Account[] accounts = accountManager.getAccounts();
         for (Account account : accounts) {
             deleteRegistrationForAccount(account);
         }
@@ -375,7 +378,7 @@ public static void reinitKeys() {
 
         AppPreferences preferences = AppPreferencesImpl.fromContext(context);
         String pushToken = preferences.getPushToken();
-        pushRegistrationToServer(pushToken);
+        pushRegistrationToServer(accountManager, pushToken);
         preferences.setKeysReInitEnabled();
     }
 
@@ -411,13 +414,18 @@ private static void migratePushKeys() {
         }
     }
 
-    public static SignatureVerification verifySignature(Context context, byte[] signatureBytes, byte[] subjectBytes) {
+    public static SignatureVerification verifySignature(
+        final Context context,
+        final UserAccountManager accountManager,
+        final byte[] signatureBytes,
+        final byte[] subjectBytes
+    ) {
         Signature signature = null;
         PublicKey publicKey;
         SignatureVerification signatureVerification = new SignatureVerification();
         signatureVerification.setSignatureValid(false);
 
-        Account[] accounts = AccountUtils.getAccounts(context);
+        Account[] accounts = accountManager.getAccounts();
 
         ArbitraryDataProvider arbitraryDataProvider = new ArbitraryDataProvider(context.getContentResolver());
         String arbitraryValue;

src/main/java/com/nextcloud/client/account/UserAccountManager.java

@@ -0,0 +1,65 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.nextcloud.client.account;
+
+import android.accounts.Account;
+
+import androidx.annotation.NonNull;
+
+public interface UserAccountManager {
+
+    int ACCOUNT_VERSION = 1;
+    int ACCOUNT_VERSION_WITH_PROPER_ID = 2;
+    String ACCOUNT_USES_STANDARD_PASSWORD = "ACCOUNT_USES_STANDARD_PASSWORD";
+
+    /**
+     * Get configured NextCloud's user accounts.
+     *
+     * @return Array of accounts or empty array, if accounts are not configured.
+     */
+    @NonNull
+    Account[] getAccounts();
+
+    /**
+     * Update the accounts in AccountManager to meet the current
+     * version of accounts expected by the app, if needed.
+     * <p>
+     * Introduced to handle a change in the structure of stored account names
+     * needed to allow different Nextcloud servers in the same domain, but not in
+     * the same path.
+     */
+    void updateAccountVersion();
+
+    /**
+     * Extract username from account.
+     *
+     * Full account name is in form of "username@nextcloud.domain".
+     *
+     * @param account Account instance
+     * @return User name (without domain) or null, if name cannot be extracted.
+     */
+    static String getUsername(Account account) {
+        if (account != null && account.name != null) {
+            return account.name.substring(0, account.name.lastIndexOf('@'));
+        } else {
+            return null;
+        }
+    }
+}