⚙️ Support custom file extensions (Notes ≥ 4.5.0)

Signed-off-by: Stefan Niedermann <info@niedermann.it>

9 files changed, 166 insertions, 172 deletions

diff --git a/app/build.gradle b/app/build.gradle
index 68fb851d..b795ef11 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -76,7 +76,7 @@ android {
 }
 
 dependencies {
-    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.2.0'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.6'
 
     // Nextcloud SSO
     implementation 'com.github.nextcloud:Android-SingleSignOn:0.6.1'
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/IManageAccountsCallback.java b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/IManageAccountsCallback.java
new file mode 100644
index 00000000..93b04811
--- /dev/null
+++ b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/IManageAccountsCallback.java
@@ -0,0 +1,16 @@
+package it.niedermann.owncloud.notes.manageaccounts;
+
+import androidx.annotation.NonNull;
+
+import it.niedermann.owncloud.notes.persistence.entity.Account;
+
+public interface IManageAccountsCallback {
+
+    void onSelect(@NonNull Account account);
+
+    void onDelete(@NonNull Account account);
+
+    void onChangeNotesPath(@NonNull Account account);
+
+    void onChangeFileSuffix(@NonNull Account account);
+}
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountAdapter.java b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountAdapter.java
index 19adee12..1c665857 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountAdapter.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountAdapter.java
@@ -21,22 +21,10 @@ public class ManageAccountAdapter extends RecyclerView.Adapter<ManageAccountView
     @NonNull
     private final List<Account> localAccounts = new ArrayList<>();
     @NonNull
-    private final Consumer<Account> onAccountClick;
-    @NonNull
-    private final Consumer<Account> onAccountDelete;
-    @NonNull
-    Consumer<Account> onChangeNotesPath;
-    @NonNull
-    Consumer<Account> onChangeFileSuffix;
+    private final IManageAccountsCallback callback;
 
-    public ManageAccountAdapter(@NonNull Consumer<Account> onAccountClick,
-                                @NonNull Consumer<Account> onAccountDelete,
-                                @NonNull Consumer<Account> onChangeNotesPath,
-                                @NonNull Consumer<Account> onChangeFileSuffix) {
-        this.onAccountClick = onAccountClick;
-        this.onAccountDelete = onAccountDelete;
-        this.onChangeNotesPath = onChangeNotesPath;
-        this.onChangeFileSuffix = onChangeFileSuffix;
+    public ManageAccountAdapter(@NonNull IManageAccountsCallback callback) {
+        this.callback = callback;
         setHasStableIds(true);
     }
 
@@ -54,10 +42,7 @@ public class ManageAccountAdapter extends RecyclerView.Adapter<ManageAccountView
     @Override
     public void onBindViewHolder(@NonNull ManageAccountViewHolder holder, int position) {
         final var localAccount = localAccounts.get(position);
-        holder.bind(localAccount, (localAccountClicked) -> {
-            setCurrentLocalAccount(localAccountClicked);
-            onAccountClick.accept(localAccountClicked);
-        }, onAccountDelete, onChangeNotesPath, onChangeFileSuffix, currentLocalAccount != null && currentLocalAccount.getId() == localAccount.getId());
+        holder.bind(localAccount, callback, currentLocalAccount != null && currentLocalAccount.getId() == localAccount.getId());
     }
 
     @Override
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountViewHolder.java b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountViewHolder.java
index 3b61851a..26b1e785 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountViewHolder.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountViewHolder.java
@@ -1,30 +1,25 @@
 package it.niedermann.owncloud.notes.manageaccounts;
 
+import static android.view.View.GONE;
+import static android.view.View.VISIBLE;
+import static it.niedermann.owncloud.notes.branding.BrandingUtil.applyBrandToLayerDrawable;
+import static it.niedermann.owncloud.notes.shared.util.ApiVersionUtil.getPreferredApiVersion;
+
 import android.graphics.drawable.LayerDrawable;
 import android.net.Uri;
-import android.view.Menu;
 import android.view.View;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.PopupMenu;
-import androidx.core.util.Consumer;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 
-import java.util.stream.Stream;
-
 import it.niedermann.nextcloud.sso.glide.SingleSignOnUrl;
 import it.niedermann.owncloud.notes.R;
 import it.niedermann.owncloud.notes.databinding.ItemAccountChooseBinding;
 import it.niedermann.owncloud.notes.persistence.entity.Account;
-import it.niedermann.owncloud.notes.shared.model.ApiVersion;
-
-import static android.view.View.GONE;
-import static android.view.View.VISIBLE;
-import static it.niedermann.owncloud.notes.branding.BrandingUtil.applyBrandToLayerDrawable;
-import static it.niedermann.owncloud.notes.shared.util.ApiVersionUtil.getPreferredApiVersion;
 
 public class ManageAccountViewHolder extends RecyclerView.ViewHolder {
 
@@ -37,10 +32,7 @@ public class ManageAccountViewHolder extends RecyclerView.ViewHolder {
 
     public void bind(
             @NonNull Account localAccount,
-            @NonNull Consumer<Account> onAccountClick,
-            @NonNull Consumer<Account> onAccountDelete,
-            @NonNull Consumer<Account> onChangeNotesPath,
-            @NonNull Consumer<Account> onChangeFileSuffix,
+            @NonNull IManageAccountsCallback callback,
             boolean isCurrentAccount
     ) {
         binding.accountName.setText(localAccount.getUserName());
@@ -50,28 +42,31 @@ public class ManageAccountViewHolder extends RecyclerView.ViewHolder {
                 .error(R.drawable.ic_account_circle_grey_24dp)
                 .apply(RequestOptions.circleCropTransform())
                 .into(binding.accountItemAvatar);
-        itemView.setOnClickListener((v) -> onAccountClick.accept(localAccount));
+        itemView.setOnClickListener((v) -> callback.onSelect(localAccount));
         binding.accountContextMenu.setVisibility(VISIBLE);
         binding.accountContextMenu.setOnClickListener((v) -> {
             final var popup = new PopupMenu(itemView.getContext(), v);
             popup.inflate(R.menu.menu_account);
+
             final var preferredApiVersion = getPreferredApiVersion(localAccount.getApiVersion());
-            if (preferredApiVersion != null && !preferredApiVersion.supportsSettings()) {
-                final var menu = popup.getMenu();
-                Stream.of(
-                        R.id.notes_path,
-                        R.id.file_suffix
-                ).forEach((i) -> menu.removeItem(menu.findItem(i).getItemId()));
+
+            if (preferredApiVersion == null || !preferredApiVersion.supportsFileSuffixChange()) {
+                popup.getMenu().removeItem(popup.getMenu().findItem(R.id.file_suffix).getItemId());
+            }
+
+            if (preferredApiVersion == null || !preferredApiVersion.supportsNotesPathChange()) {
+                popup.getMenu().removeItem(popup.getMenu().findItem(R.id.notes_path).getItemId());
             }
+
             popup.setOnMenuItemClickListener(item -> {
                 if (item.getItemId() == R.id.notes_path) {
-                    onChangeNotesPath.accept(localAccount);
+                    callback.onChangeNotesPath(localAccount);
                     return true;
                 } else if (item.getItemId() == R.id.file_suffix) {
-                    onChangeFileSuffix.accept(localAccount);
+                    callback.onChangeFileSuffix(localAccount);
                     return true;
                 } else if (item.getItemId() == R.id.delete) {
-                    onAccountDelete.accept(localAccount);
+                    callback.onDelete(localAccount);
                     return true;
                 }
                 return false;
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountsActivity.java b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountsActivity.java
index b6341f61..8d0c253f 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountsActivity.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/manageaccounts/ManageAccountsActivity.java
@@ -1,26 +1,28 @@
 package it.niedermann.owncloud.notes.manageaccounts;
 
+import static it.niedermann.owncloud.notes.shared.util.ApiVersionUtil.getPreferredApiVersion;
+
 import android.accounts.NetworkErrorException;
 import android.os.Bundle;
 import android.util.TypedValue;
 import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
 import android.widget.EditText;
 import android.widget.FrameLayout;
 import android.widget.ProgressBar;
-import android.widget.Spinner;
 import android.widget.Toast;
 
 import androidx.annotation.AttrRes;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.Px;
-import androidx.appcompat.app.AlertDialog;
+import androidx.annotation.StringRes;
 import androidx.lifecycle.ViewModelProvider;
 
 import com.nextcloud.android.sso.AccountImporter;
 import com.nextcloud.android.sso.exceptions.NextcloudFilesAppAccountNotFoundException;
 
+import java.util.function.Function;
+
 import it.niedermann.owncloud.notes.LockedActivity;
 import it.niedermann.owncloud.notes.R;
 import it.niedermann.owncloud.notes.branding.BrandedAlertDialogBuilder;
@@ -35,11 +37,7 @@ import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 
-import static android.os.Build.VERSION.SDK_INT;
-import static android.os.Build.VERSION_CODES.LOLLIPOP_MR1;
-import static it.niedermann.owncloud.notes.shared.util.ApiVersionUtil.getPreferredApiVersion;
-
-public class ManageAccountsActivity extends LockedActivity {
+public class ManageAccountsActivity extends LockedActivity implements IManageAccountsCallback {
 
     private ActivityManageAccountsBinding binding;
     private ManageAccountsViewModel viewModel;
@@ -55,12 +53,7 @@ public class ManageAccountsActivity extends LockedActivity {
         setContentView(binding.getRoot());
         setSupportActionBar(binding.toolbar);
 
-        adapter = new ManageAccountAdapter(
-                this::selectAccount,
-                this::deleteAccount,
-                this::onChangeNotesPath,
-                this::onChangeFileSuffix
-        );
+        adapter = new ManageAccountAdapter(this);
         binding.accounts.setAdapter(adapter);
 
         viewModel.getAccounts$().observe(this, (accounts) -> {
@@ -69,7 +62,7 @@ public class ManageAccountsActivity extends LockedActivity {
                 return;
             }
             this.adapter.setLocalAccounts(accounts);
-            viewModel.getCurrentAccount(this, new IResponseCallback<Account>() {
+            viewModel.getCurrentAccount(this, new IResponseCallback<>() {
                 @Override
                 public void onSuccess(Account result) {
                     runOnUiThread(() -> adapter.setCurrentLocalAccount(result));
@@ -84,12 +77,13 @@ public class ManageAccountsActivity extends LockedActivity {
         });
     }
 
-    private void selectAccount(@NonNull Account accountToSelect) {
+    public void onSelect(@NonNull Account accountToSelect) {
+        adapter.setCurrentLocalAccount(accountToSelect);
         viewModel.selectAccount(accountToSelect, this);
     }
 
-    private void deleteAccount(@NonNull Account accountToDelete) {
-        viewModel.countUnsynchronizedNotes(accountToDelete.getId(), new IResponseCallback<Long>() {
+    public void onDelete(@NonNull Account accountToDelete) {
+        viewModel.countUnsynchronizedNotes(accountToDelete.getId(), new IResponseCallback<>() {
             @Override
             public void onSuccess(Long unsynchronizedChangesCount) {
                 runOnUiThread(() -> {
@@ -113,127 +107,76 @@ public class ManageAccountsActivity extends LockedActivity {
         });
     }
 
-    private void onChangeNotesPath(@NonNull Account localAccount) {
+    public void onChangeNotesPath(@NonNull Account localAccount) {
+        changeAccountSetting(localAccount,
+                R.string.settings_notes_path,
+                R.string.settings_notes_path_description,
+                R.string.settings_notes_path_success,
+                NotesSettings::getNotesPath,
+                property -> new NotesSettings(property, null)
+        );
+    }
+
+    public void onChangeFileSuffix(@NonNull Account localAccount) {
+        changeAccountSetting(localAccount,
+                R.string.settings_file_suffix,
+                R.string.settings_file_suffix_description,
+                R.string.settings_file_suffix_success,
+                NotesSettings::getFileSuffix,
+                property -> new NotesSettings(null, property)
+        );
+    }
+
+    private void changeAccountSetting(@NonNull Account localAccount, @StringRes int title, @StringRes int message, @StringRes int successMessage, @NonNull Function<NotesSettings, String> propertyExtractor, @NonNull Function<String, NotesSettings> settingsFactory) {
         final var repository = NotesRepository.getInstance(getApplicationContext());
         final var editText = new EditText(this);
         final var wrapper = createDialogViewWrapper();
         final var dialog = new BrandedAlertDialogBuilder(this)
-                .setTitle(R.string.settings_notes_path)
-                .setMessage(R.string.settings_notes_path_description)
+                .setTitle(title)
+                .setMessage(message)
                 .setView(wrapper)
                 .setNeutralButton(android.R.string.cancel, null)
-                .setPositiveButton(R.string.action_edit_save, (v, d) -> new Thread(() -> {
-                    try {
-                        final var putSettingsCall = repository.putServerSettings(AccountImporter.getSingleSignOnAccount(this, localAccount.getAccountName()), new NotesSettings(editText.getText().toString(), null), getPreferredApiVersion(localAccount.getApiVersion()));
-                        putSettingsCall.enqueue(new Callback<>() {
-                            @Override
-                            public void onResponse(@NonNull Call<NotesSettings> call, @NonNull Response<NotesSettings> response) {
-                                final var body = response.body();
-                                if (response.isSuccessful() && body != null) {
-                                    runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(R.string.settings_notes_path_success, body.getNotesPath()), Toast.LENGTH_LONG).show());
-                                } else {
-                                    runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(R.string.http_status_code, response.code()), Toast.LENGTH_LONG).show());
+                .setPositiveButton(R.string.action_edit_save, (v, d) -> {
+                    final var property = editText.getText().toString();
+                    new Thread(() -> {
+                        try {
+                            final var putSettingsCall = repository.putServerSettings(AccountImporter.getSingleSignOnAccount(this, localAccount.getAccountName()), settingsFactory.apply(property), getPreferredApiVersion(localAccount.getApiVersion()));
+                            putSettingsCall.enqueue(new Callback<>() {
+                                @Override
+                                public void onResponse(@NonNull Call<NotesSettings> call, @NonNull Response<NotesSettings> response) {
+                                    final var body = response.body();
+                                    if (response.isSuccessful() && body != null) {
+                                        runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(successMessage, propertyExtractor.apply(body)), Toast.LENGTH_LONG).show());
+                                    } else {
+                                        runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(R.string.http_status_code, response.code()), Toast.LENGTH_LONG).show());
+                                    }
                                 }
-                            }
 
-                            @Override
-                            public void onFailure(@NonNull Call<NotesSettings> call, @NonNull Throwable t) {
-                                runOnUiThread(() -> ExceptionDialogFragment.newInstance(t).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName()));
-                            }
-                        });
-                    } catch (NextcloudFilesAppAccountNotFoundException e) {
-                        ExceptionDialogFragment.newInstance(e).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
-                    }
-                }).start())
-                .show();
-        try {
-            repository.getServerSettings(AccountImporter.getSingleSignOnAccount(this, localAccount.getAccountName()), getPreferredApiVersion(localAccount.getApiVersion()))
-                    .enqueue(new Callback<>() {
-                        @Override
-                        public void onResponse(@NonNull Call<NotesSettings> call, @NonNull Response<NotesSettings> response) {
-                            runOnUiThread(() -> {
-                                final var body = response.body();
-                                if (response.isSuccessful() && body != null) {
-                                    wrapper.removeAllViews();
-                                    final var editText = new EditText(ManageAccountsActivity.this);
-                                    editText.setText(body.getNotesPath());
-                                    wrapper.addView(editText);
-                                } else {
-                                    dialog.dismiss();
-                                    ExceptionDialogFragment.newInstance(new NetworkErrorException(getString(R.string.http_status_code, response.code()))).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
+                                @Override
+                                public void onFailure(@NonNull Call<NotesSettings> call, @NonNull Throwable t) {
+                                    runOnUiThread(() -> ExceptionDialogFragment.newInstance(t).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName()));
                                 }
                             });
+                        } catch (NextcloudFilesAppAccountNotFoundException e) {
+                            ExceptionDialogFragment.newInstance(e).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
                         }
-
-                        @Override
-                        public void onFailure(@NonNull Call<NotesSettings> call, @NonNull Throwable t) {
-                            runOnUiThread(() -> {
-                                dialog.dismiss();
-                                ExceptionDialogFragment.newInstance(t).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
-                            });
-                        }
-                    });
-        } catch (NextcloudFilesAppAccountNotFoundException e) {
-            dialog.dismiss();
-            ExceptionDialogFragment.newInstance(e).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
-        }
-    }
-
-    private void onChangeFileSuffix(@NonNull Account localAccount) {
-        final var repository = NotesRepository.getInstance(getApplicationContext());
-        final var spinner = new Spinner(this);
-        final var wrapper = createDialogViewWrapper();
-        final var adapter = ArrayAdapter.createFromResource(this, R.array.settings_file_suffixes, android.R.layout.simple_spinner_item);
-        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-        spinner.setAdapter(adapter);
-        final var dialog = new BrandedAlertDialogBuilder(this)
-                .setTitle(R.string.settings_file_suffix)
-                .setMessage(R.string.settings_file_suffix_description)
-                .setView(wrapper)
-                .setNeutralButton(android.R.string.cancel, null)
-                .setPositiveButton(R.string.action_edit_save, (v, d) -> new Thread(() -> {
-                    try {
-                        final Call<NotesSettings> putSettingsCall = repository.putServerSettings(AccountImporter.getSingleSignOnAccount(this, localAccount.getAccountName()), new NotesSettings(null, spinner.getSelectedItem().toString()), getPreferredApiVersion(localAccount.getApiVersion()));
-                        putSettingsCall.enqueue(new Callback<>() {
-                            @Override
-                            public void onResponse(@NonNull Call<NotesSettings> call, @NonNull Response<NotesSettings> response) {
-                                final var body = response.body();
-                                if (response.isSuccessful() && body != null) {
-                                    runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(R.string.settings_file_suffix_success, body.getNotesPath()), Toast.LENGTH_LONG).show());
-                                } else {
-                                    runOnUiThread(() -> Toast.makeText(ManageAccountsActivity.this, getString(R.string.http_status_code, response.code()), Toast.LENGTH_LONG).show());
-                                }
-                            }
-
-                            @Override
-                            public void onFailure(@NonNull Call<NotesSettings> call, @NonNull Throwable t) {
-                                runOnUiThread(() -> ExceptionDialogFragment.newInstance(t).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName()));
-                            }
-                        });
-                    } catch (NextcloudFilesAppAccountNotFoundException e) {
-                        runOnUiThread(() -> ExceptionDialogFragment.newInstance(e).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName()));
-                    }
-                }).start())
+                    }).start();
+                })
                 .show();
         try {
             repository.getServerSettings(AccountImporter.getSingleSignOnAccount(this, localAccount.getAccountName()), getPreferredApiVersion(localAccount.getApiVersion()))
                     .enqueue(new Callback<>() {
                         @Override
                         public void onResponse(@NonNull Call<NotesSettings> call, @NonNull Response<NotesSettings> response) {
-                            final NotesSettings body = response.body();
                             runOnUiThread(() -> {
+                                final var body = response.body();
                                 if (response.isSuccessful() && body != null) {
-                                    for (int i = 0; i < adapter.getCount(); i++) {
-                                        if (adapter.getItem(i).equals(body.getFileSuffix())) {
-                                            spinner.setSelection(i);
-                                            break;
-                                        }
-                                    }
                                     wrapper.removeAllViews();
-                                    wrapper.addView(spinner);
+                                    editText.setText(propertyExtractor.apply(body));
+                                    wrapper.addView(editText);
                                 } else {
                                     dialog.dismiss();
-                                    ExceptionDialogFragment.newInstance(new Exception(getString(R.string.http_status_code, response.code()))).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
+                                    ExceptionDialogFragment.newInstance(new NetworkErrorException(getString(R.string.http_status_code, response.code()))).show(getSupportFragmentManager(), ExceptionDialogFragment.class.getSimpleName());
                                 }
                             });
                         }
@@ -258,9 +201,7 @@ public class ManageAccountsActivity extends LockedActivity {
         progressBar.setIndeterminate(true);
         final var wrapper = new FrameLayout(this);
         final int paddingVertical = getResources().getDimensionPixelSize(R.dimen.spacer_1x);
-        final int paddingHorizontal = SDK_INT >= LOLLIPOP_MR1
-                ? getDimensionFromAttribute(android.R.attr.dialogPreferredPadding)
-                : getResources().getDimensionPixelSize(R.dimen.spacer_2x);
+        final int paddingHorizontal = getDimensionFromAttribute(android.R.attr.dialogPreferredPadding);
         wrapper.setPadding(paddingHorizontal, paddingVertical, paddingHorizontal, paddingVertical);
         wrapper.addView(progressBar);
         return wrapper;
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/shared/model/ApiVersion.java b/app/src/main/java/it/niedermann/owncloud/notes/shared/model/ApiVersion.java
index 7ac09d66..f0dcf0ad 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/shared/model/ApiVersion.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/shared/model/ApiVersion.java
@@ -4,16 +4,16 @@ package it.niedermann.owncloud.notes.shared.model;
 import androidx.annotation.NonNull;
 
 import java.util.Objects;
-import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 @SuppressWarnings("WeakerAccess")
 public class ApiVersion implements Comparable<ApiVersion> {
     private static final Pattern NUMBER_EXTRACTION_PATTERN = Pattern.compile("[0-9]+");
-    private static final ApiVersion VERSION_1_2 = new ApiVersion("1.2", 1, 2);
 
-    public static final ApiVersion API_VERSION_0_2 = new ApiVersion(0, 2);
-    public static final ApiVersion API_VERSION_1_0 = new ApiVersion(1, 0);
+    public static final ApiVersion API_VERSION_0_2 = new ApiVersion("0.2", 0, 2);
+    public static final ApiVersion API_VERSION_1_0 = new ApiVersion("1.0", 1, 0);
+    public static final ApiVersion API_VERSION_1_2 = new ApiVersion("1.2", 1, 2);
+    public static final ApiVersion API_VERSION_1_3 = new ApiVersion("1.3", 1, 3);
 
     public static final ApiVersion[] SUPPORTED_API_VERSIONS = new ApiVersion[]{
             API_VERSION_1_0,
@@ -45,7 +45,7 @@ public class ApiVersion implements Comparable<ApiVersion> {
     public static ApiVersion of(String versionString) {
         int major = 0, minor = 0;
         if (versionString != null) {
-            String[] split = versionString.split("\\.");
+            final String[] split = versionString.split("\\.");
             if (split.length > 0) {
                 major = extractNumber(split[0]);
                 if (split.length > 1) {
@@ -80,8 +80,19 @@ public class ApiVersion implements Comparable<ApiVersion> {
         return 0;
     }
 
-    public boolean supportsSettings() {
-        return getMajor() >= 1 && getMinor() >= 2;
+    /**
+     * While setting the file suffix to <code>.txt</code> or <code>.md</code> was possible starting
+     * with {@link #API_VERSION_1_2}, we will only support this feature with {@link #API_VERSION_1_3}
+     * because it allows us to set any value and skip client side validations.
+     *
+     * @see <a href="https://github.com/nextcloud/notes/blob/master/docs/api/v1.md#settings">Settings API</a>
+     */
+    public boolean supportsFileSuffixChange() {
+        return getMajor() >= API_VERSION_1_3.getMajor() && getMinor() >= API_VERSION_1_3.getMinor();
+    }
+
+    public boolean supportsNotesPathChange() {
+        return getMajor() >= API_VERSION_1_2.getMajor() && getMinor() >= API_VERSION_1_2.getMinor();
     }
 
     /**
diff --git a/app/src/test/java/it/niedermann/owncloud/notes/shared/model/ApiVersionTest.java b/app/src/test/java/it/niedermann/owncloud/notes/shared/model/ApiVersionTest.java
new file mode 100644
index 00000000..5b3b6f5b
--- /dev/null
+++ b/app/src/test/java/it/niedermann/owncloud/notes/shared/model/ApiVersionTest.java
@@ -0,0 +1,45 @@
+package it.niedermann.owncloud.notes.shared.model;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class ApiVersionTest {
+
+    @Test
+    public void shouldOnlyCompareMajorApiVersions() {
+        final var apiVersion = new ApiVersion("1.0", 1, 0);
+
+        assertEquals(1, apiVersion.compareTo(ApiVersion.API_VERSION_0_2));
+        assertEquals(0, apiVersion.compareTo(ApiVersion.API_VERSION_1_0));
+        assertEquals(0, apiVersion.compareTo(ApiVersion.API_VERSION_1_2));
+    }
+
+    @Test
+    public void shouldOnlyEqualMajorApiVersions() {
+        final var apiVersion = new ApiVersion("1.0", 1, 0);
+
+        assertNotEquals(apiVersion, ApiVersion.API_VERSION_0_2);
+        assertEquals(apiVersion, ApiVersion.API_VERSION_1_0);
+        assertEquals(apiVersion, ApiVersion.API_VERSION_1_2);
+    }
+
+    @Test
+    public void shouldSupportFileSuffixChangesWithApi1_3andAbove() {
+        assertFalse(ApiVersion.API_VERSION_0_2.supportsFileSuffixChange());
+        assertFalse(ApiVersion.API_VERSION_1_0.supportsFileSuffixChange());
+        assertFalse(ApiVersion.API_VERSION_1_2.supportsFileSuffixChange());
+        assertTrue(ApiVersion.API_VERSION_1_3.supportsFileSuffixChange());
+    }
+
+    @Test
+    public void shouldSupportNotesPathChangesWithApi1_2andAbove() {
+        assertFalse(ApiVersion.API_VERSION_0_2.supportsNotesPathChange());
+        assertFalse(ApiVersion.API_VERSION_1_0.supportsNotesPathChange());
+        assertTrue(ApiVersion.API_VERSION_1_2.supportsNotesPathChange());
+        assertTrue(ApiVersion.API_VERSION_1_3.supportsNotesPathChange());
+    }
+}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 6a4a994a..04e3f46c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.3.0-beta05'
+        classpath 'com.android.tools.build:gradle:7.2.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/fastlane/metadata/android/en-US/changelogs/3005001.txt b/fastlane/metadata/android/en-US/changelogs/3005001.txt
index d92d4a72..d11ac7ff 100644
--- a/fastlane/metadata/android/en-US/changelogs/3005001.txt
+++ b/fastlane/metadata/android/en-US/changelogs/3005001.txt
@@ -1,6 +1,7 @@
 - 📱️ Add option to not keep screen on (#1531)
 - 🐞 Favorite star in menu not clickable (#1541)
 - 🐞 Fix back button behavior in widgets (#1412) - by @newhinton
+- ⚙️ Support custom file extensions (Notes ≥ 4.5.0)
 - ⚙️ Add monochrome icon (#1544) - by @salixor
 - ⚙️ Use the new Android 12 SplashScreen API (#1546) - by @salixor
 - 🌎 Updated translations