Added option for message classification

app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java

@@ -81,6 +81,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private SwitchCompat swExternalSearch;
     private SwitchCompat swShortcuts;
     private SwitchCompat swFts;
+    private SwitchCompat swClassification;
+    private ImageButton ibClassification;
     private TextView tvFtsIndexed;
     private TextView tvFtsPro;
     private Spinner spLanguage;
@@ -118,7 +120,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private final static long MIN_FILE_SIZE = 1024 * 1024L;
 
     private final static String[] RESET_OPTIONS = new String[]{
-            "shortcuts", "fts", "language", "watchdog", "updates",
+            "shortcuts", "fts", "classification", "language", "watchdog", "updates",
             "experiments", "query_threads", "crash_reports", "cleanup_attachments",
             "protocol", "debug", "auth_plain", "auth_login", "auth_sasl"
     };
@@ -161,6 +163,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         swExternalSearch = view.findViewById(R.id.swExternalSearch);
         swShortcuts = view.findViewById(R.id.swShortcuts);
         swFts = view.findViewById(R.id.swFts);
+        swClassification = view.findViewById(R.id.swClassification);
+        ibClassification = view.findViewById(R.id.ibClassification);
         tvFtsIndexed = view.findViewById(R.id.tvFtsIndexed);
         tvFtsPro = view.findViewById(R.id.tvFtsPro);
         spLanguage = view.findViewById(R.id.spLanguage);
@@ -254,6 +258,30 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
 
         Helper.linkPro(tvFtsPro);
 
+        swClassification.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            private int count = 0;
+
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean checked) {
+                prefs.edit().putBoolean("classification", checked).apply();
+                if (!checked) {
+                    count++;
+                    if (count >= 3) {
+                        count = 0;
+                        MessageClassifier.clear(buttonView.getContext());
+                        ToastEx.makeText(buttonView.getContext(), R.string.title_reset, Toast.LENGTH_LONG).show();
+                    }
+                }
+            }
+        });
+
+        ibClassification.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Helper.viewFAQ(v.getContext(), 125);
+            }
+        });
+
         spLanguage.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override
             public void onItemSelected(AdapterView<?> adapterView, View view, int position, long id) {
@@ -721,6 +749,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         swExternalSearch.setChecked(Helper.isComponentEnabled(getContext(), ActivitySearch.class));
         swShortcuts.setChecked(prefs.getBoolean("shortcuts", true));
         swFts.setChecked(prefs.getBoolean("fts", false));
+        swClassification.setChecked(prefs.getBoolean("classification", false));
 
         int selected = -1;
         String language = prefs.getString("language", null);

app/src/main/java/eu/faircode/email/MessageClassifier.java

@@ -312,9 +312,16 @@ public class MessageClassifier {
         Log.i("Classifier loaded");
     }
 
+    static synchronized void clear(Context context) {
+        Log.i("Classifier clear");
+        classMessages.clear();
+        wordClassFrequency.clear();
+        dirty = true;
+    }
+
     static boolean isEnabled(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        return prefs.getBoolean("experiments", false);
+        return prefs.getBoolean("classification", false);
     }
 
     static boolean canClassify(String folderType) {

app/src/main/res/layout/fragment_options_misc.xml

@@ -112,6 +112,27 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tvFtsIndexed" />
 
+        <androidx.appcompat.widget.SwitchCompat
+            android:id="@+id/swClassification"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/title_advanced_classification"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvFtsPro"
+            app:switchPadding="12dp" />
+
+        <ImageButton
+            android:id="@+id/ibClassification"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:contentDescription="@string/title_info"
+            android:tooltipText="@string/title_info"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/swClassification"
+            app:srcCompat="@drawable/twotone_info_24" />
+
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvLanguage"
             android:layout_width="0dp"
@@ -123,7 +144,7 @@
             android:textColor="?android:attr/textColorPrimary"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvFtsPro" />
+            app:layout_constraintTop_toBottomOf="@id/ibClassification" />
 
         <Spinner
             android:id="@+id/spLanguage"

app/src/main/res/values/strings.xml

@@ -516,6 +516,7 @@
     <string name="title_advanced_language_detection">Detect message text language</string>
     <string name="title_advanced_fts">Build search index</string>
     <string name="title_advanced_fts_indexed">%1$d / %2$d messages indexed (%3$s)</string>
+    <string name="title_advanced_classification">Classify messages</string>
     <string name="title_advanced_language">Language</string>
     <string name="title_advanced_language_system">System</string>
     <string name="title_advanced_watchdog">Periodically check if FairEmail is still active</string>