Share filters with web client (#956)

* First step toward synchronized content filters

* Add simple filter management UI

* Remove old regex filter UI

* More cleanup

* Escape filter phrases when applying them via regex

* Apply code review feedback

* Fix live timeline update when filters change

app/src/main/AndroidManifest.xml

@@ -115,6 +115,7 @@
         <activity android:name=".ListsActivity" />
         <activity android:name=".ModalTimelineActivity" />
         <activity android:name=".LicenseActivity" />
+        <activity android:name=".FiltersActivity" />
 
         <receiver android:name=".receiver.NotificationClearBroadcastReceiver" />
 

app/src/main/java/com/keylesspalace/tusky/FiltersActivity.kt

@@ -0,0 +1,180 @@
+package com.keylesspalace.tusky
+
+import android.os.Bundle
+import android.view.MenuItem
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import com.keylesspalace.tusky.appstore.EventHub
+import com.keylesspalace.tusky.appstore.PreferenceChangedEvent
+import com.keylesspalace.tusky.entity.Filter
+import com.keylesspalace.tusky.network.MastodonApi
+import kotlinx.android.synthetic.main.activity_filters.*
+import kotlinx.android.synthetic.main.dialog_filter.*
+import kotlinx.android.synthetic.main.toolbar_basic.*
+import okhttp3.ResponseBody
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import javax.inject.Inject
+
+class FiltersActivity: BaseActivity() {
+    @Inject
+    lateinit var api: MastodonApi
+
+    @Inject
+    lateinit var eventHub: EventHub
+
+    private lateinit var context : String
+    private lateinit var filters: MutableList<Filter>
+    private lateinit var dialog: AlertDialog
+
+    companion object {
+        const val FILTERS_CONTEXT = "filters_context"
+        const val FILTERS_TITLE = "filters_title"
+    }
+
+    private fun updateFilter(filter: Filter, itemIndex: Int) {
+        api.updateFilter(filter.id, filter.phrase, filter.context, filter.irreversible, filter.wholeWord, filter.expiresAt)
+            .enqueue(object: Callback<Filter>{
+                override fun onFailure(call: Call<Filter>, t: Throwable) {
+                    Toast.makeText(this@FiltersActivity, "Error updating filter '${filter.phrase}'", Toast.LENGTH_SHORT).show()
+                }
+
+                override fun onResponse(call: Call<Filter>, response: Response<Filter>) {
+                    val updatedFilter = response.body()!!
+                    if (updatedFilter.context.contains(context)) {
+                        filters[itemIndex] = updatedFilter
+                    } else {
+                        filters.removeAt(itemIndex)
+                    }
+                    refreshFilterDisplay()
+                    eventHub.dispatch(PreferenceChangedEvent(context))
+                }
+            })
+    }
+
+    private fun deleteFilter(itemIndex: Int) {
+        val filter = filters[itemIndex]
+        if (filter.context.count() == 1) {
+            // This is the only context for this filter; delete it
+            api.deleteFilter(filters[itemIndex].id).enqueue(object: Callback<ResponseBody> {
+                override fun onFailure(call: Call<ResponseBody>, t: Throwable) {
+                    Toast.makeText(this@FiltersActivity, "Error updating filter '${filters[itemIndex].phrase}'", Toast.LENGTH_SHORT).show()
+                }
+
+                override fun onResponse(call: Call<ResponseBody>, response: Response<ResponseBody>) {
+                    filters.removeAt(itemIndex)
+                    refreshFilterDisplay()
+                    eventHub.dispatch(PreferenceChangedEvent(context))
+                }
+            })
+        } else {
+            // Keep the filter, but remove it from this context
+            val oldFilter = filters[itemIndex]
+            val newFilter = Filter(oldFilter.id, oldFilter.phrase, oldFilter.context.filter { c -> c != context },
+                    oldFilter.expiresAt, oldFilter.irreversible, oldFilter.wholeWord)
+            updateFilter(newFilter, itemIndex)
+        }
+    }
+
+    private fun createFilter(phrase: String) {
+        api.createFilter(phrase, listOf(context), false, true, "").enqueue(object: Callback<Filter> {
+            override fun onResponse(call: Call<Filter>, response: Response<Filter>) {
+                filters.add(response.body()!!)
+                refreshFilterDisplay()
+                eventHub.dispatch(PreferenceChangedEvent(context))
+            }
+
+            override fun onFailure(call: Call<Filter>, t: Throwable) {
+                Toast.makeText(this@FiltersActivity, "Error creating filter '${phrase}'", Toast.LENGTH_SHORT).show()
+            }
+        })
+    }
+
+    private fun showAddFilterDialog() {
+        dialog = AlertDialog.Builder(this@FiltersActivity)
+                .setTitle(R.string.filter_addition_dialog_title)
+                .setView(R.layout.dialog_filter)
+                .setPositiveButton(android.R.string.ok){ _, _ ->
+                    createFilter(dialog.phraseEditText.text.toString())
+                }
+                .setNeutralButton(android.R.string.cancel, null)
+                .create()
+        dialog.show()
+    }
+
+    private fun setupEditDialogForItem(itemIndex: Int) {
+        dialog = AlertDialog.Builder(this@FiltersActivity)
+                .setTitle(R.string.filter_edit_dialog_title)
+                .setView(R.layout.dialog_filter)
+                .setPositiveButton(R.string.filter_dialog_update_button) { _, _ ->
+                    val oldFilter = filters[itemIndex]
+                    val newFilter = Filter(oldFilter.id, dialog.phraseEditText.text.toString(), oldFilter.context,
+                            oldFilter.expiresAt, oldFilter.irreversible, oldFilter.wholeWord)
+                    updateFilter(newFilter, itemIndex)
+                }
+                .setNegativeButton(R.string.filter_dialog_remove_button) { _, _ ->
+                    deleteFilter(itemIndex)
+                }
+                .setNeutralButton(android.R.string.cancel, null)
+                .create()
+        dialog.show()
+
+        // Need to show the dialog before referencing any elements from its view
+        dialog.phraseEditText.setText(filters[itemIndex].phrase)
+    }
+
+    private fun refreshFilterDisplay() {
+        filtersView.adapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, filters.map { filter -> filter.phrase })
+        filtersView.onItemClickListener = AdapterView.OnItemClickListener { _, _, position, _ -> setupEditDialogForItem(position) }
+    }
+
+    private fun loadFilters() {
+        api.filters.enqueue(object : Callback<List<Filter>> {
+            override fun onResponse(call: Call<List<Filter>>, response: Response<List<Filter>>) {
+                filters = response.body()!!.filter { filter -> filter.context.contains(context) }.toMutableList()
+                refreshFilterDisplay()
+            }
+
+            override fun onFailure(call: Call<List<Filter>>, t: Throwable) {
+                // Anything?
+            }
+        })
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.activity_filters)
+        setupToolbarBackArrow()
+        filter_floating_add.setOnClickListener {
+            showAddFilterDialog()
+        }
+
+        title = intent?.getStringExtra(FILTERS_TITLE)
+        context = intent?.getStringExtra(FILTERS_CONTEXT)!!
+        loadFilters()
+    }
+
+    private fun setupToolbarBackArrow() {
+        setSupportActionBar(toolbar)
+        supportActionBar?.run {
+            // Back button
+            setDisplayHomeAsUpEnabled(true)
+            setDisplayShowHomeEnabled(true)
+        }
+    }
+
+    // Activate back arrow in toolbar
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            android.R.id.home -> {
+                onBackPressed()
+                return true
+            }
+        }
+        return super.onOptionsItemSelected(item)
+    }
+}

app/src/main/java/com/keylesspalace/tusky/di/ActivitiesModule.kt

@@ -89,4 +89,7 @@ abstract class ActivitiesModule {
     @ContributesAndroidInjector
     abstract fun contributesTabPreferenceActivity(): TabPreferenceActivity
 
-}
+    @ContributesAndroidInjector
+    abstract fun contributesFiltersActivity(): FiltersActivity
+
+}

app/src/main/java/com/keylesspalace/tusky/entity/Filter.kt

@@ -0,0 +1,47 @@
+/* Copyright 2018 Levi Bard
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky 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 General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.entity
+
+import com.google.gson.annotations.SerializedName
+
+data class Filter (
+    val id: String,
+    val phrase: String,
+    val context: List<String>,
+    @SerializedName("expires_at") val expiresAt: String?,
+    val irreversible: Boolean,
+    @SerializedName("whole_word") val wholeWord: Boolean
+) {
+    public companion object {
+        const val HOME = "home"
+        const val NOTIFICATIONS = "notifications"
+        const val PUBLIC = "public"
+        const val THREAD = "thread"
+    }
+
+    override fun hashCode(): Int {
+        return id.hashCode()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is Filter) {
+            return false
+        }
+        val filter = other as Filter?
+        return filter?.id.equals(id)
+    }
+}
+

app/src/main/java/com/keylesspalace/tusky/fragment/TimelineFragment.java

@@ -20,6 +20,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -45,6 +46,7 @@ import com.keylesspalace.tusky.appstore.StatusDeletedEvent;
 import com.keylesspalace.tusky.appstore.UnfollowEvent;
 import com.keylesspalace.tusky.db.AccountManager;
 import com.keylesspalace.tusky.di.Injectable;
+import com.keylesspalace.tusky.entity.Filter;
 import com.keylesspalace.tusky.entity.Status;
 import com.keylesspalace.tusky.interfaces.ActionButtonActivity;
 import com.keylesspalace.tusky.interfaces.StatusActionListener;
@@ -64,7 +66,9 @@ import com.keylesspalace.tusky.view.BackgroundMessageView;
 import com.keylesspalace.tusky.view.EndlessOnScrollListener;
 import com.keylesspalace.tusky.viewdata.StatusViewData;
 
+import java.util.ArrayList;
 import java.io.IOException;
+import java.util.Collections;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -312,6 +316,20 @@ public class TimelineFragment extends SFragment implements
                         });
     }
 
+    private void reloadFilters(boolean refresh) {
+        mastodonApi.getFilters().enqueue(new Callback<List<Filter>>() {
+            @Override
+            public void onResponse(Call<List<Filter>> call, Response<List<Filter>> response) {
+                applyFilters(response.body(), refresh);
+            }
+
+            @Override
+            public void onFailure(Call<List<Filter>> call, Throwable t) {
+                Log.e(TAG, "Error getting filters from server");
+            }
+        });
+    }
+
     private void setupTimelinePreferences() {
         SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
         alwaysShowSensitiveMedia = accountManager.getActiveAccount().getAlwaysShowSensitiveMedia();
@@ -325,16 +343,43 @@ public class TimelineFragment extends SFragment implements
 
         filter = preferences.getBoolean("tabFilterHomeBoosts", true);
         filterRemoveReblogs = kind == Kind.HOME && !filter;
+        reloadFilters(false);
+    }
 
-        String regexFilter = preferences.getString("tabFilterRegex", "");
+    private static boolean filterContextMatchesKind(Kind kind, List<String> filterContext) {
-        filterRemoveRegex = (kind == Kind.HOME
+        // home, notifications, public, thread
-                || kind == Kind.PUBLIC_LOCAL
+        switch(kind) {
-                || kind == Kind.PUBLIC_FEDERATED)
+            case HOME:
-                && !regexFilter.isEmpty();
+                return filterContext.contains(Filter.HOME);
+            case PUBLIC_FEDERATED:
+            case PUBLIC_LOCAL:
+            case TAG:
+                return filterContext.contains(Filter.PUBLIC);
+            case FAVOURITES:
+                return (filterContext.contains(Filter.PUBLIC) || filterContext.contains(Filter.NOTIFICATIONS));
+            default:
+                return false;
+        }
+    }
 
+    private static String filterToRegexToken(Filter filter) {
+        String phrase = Pattern.quote(filter.getPhrase());
+        return filter.getWholeWord() ? String.format("\\b%s\\b", phrase) : phrase;
+    }
+
+    private void applyFilters(List<Filter> filters, boolean refresh) {
+        List<String> tokens = new ArrayList<>();
+        for (Filter filter : filters) {
+            if (filterContextMatchesKind(kind, filter.getContext())) {
+                tokens.add(filterToRegexToken(filter));
+            }
+        }
+        filterRemoveRegex = !tokens.isEmpty();
         if (filterRemoveRegex) {
-            filterRemoveRegexMatcher = Pattern.compile(regexFilter, Pattern.CASE_INSENSITIVE)
+            filterRemoveRegexMatcher = Pattern.compile(TextUtils.join("|", tokens), Pattern.CASE_INSENSITIVE).matcher("");
-                    .matcher("");
+        }
+        if (refresh) {
+            fullyRefresh();
         }
     }
 
@@ -765,19 +810,12 @@ public class TimelineFragment extends SFragment implements
                 }
                 break;
             }
-            case "tabFilterRegex": {
+            case Filter.HOME:
-                boolean oldFilterRemoveRegex = filterRemoveRegex;
+            case Filter.NOTIFICATIONS:
-                String newFilterRemoveRegexPattern = sharedPreferences.getString("tabFilterRegex", "");
+            case Filter.THREAD:
-                boolean patternChanged;
+            case Filter.PUBLIC: {
-                if (filterRemoveRegexMatcher != null) {
+                if (filterContextMatchesKind(kind, Collections.singletonList(key))) {
-                    patternChanged = !newFilterRemoveRegexPattern.equalsIgnoreCase(filterRemoveRegexMatcher.pattern().pattern());
+                    reloadFilters(true);
-                } else {
-                    patternChanged = !newFilterRemoveRegexPattern.isEmpty();
-                }
-                filterRemoveRegex = (kind == Kind.HOME || kind == Kind.PUBLIC_LOCAL || kind == Kind.PUBLIC_FEDERATED) && !newFilterRemoveRegexPattern.isEmpty();
-                if (oldFilterRemoveRegex != filterRemoveRegex || patternChanged) {
-                    filterRemoveRegexMatcher = Pattern.compile(newFilterRemoveRegexPattern, Pattern.CASE_INSENSITIVE).matcher("");
-                    fullyRefresh();
                 }
                 break;
             }

app/src/main/java/com/keylesspalace/tusky/fragment/preference/AccountPreferencesFragment.kt

@@ -32,6 +32,7 @@ import com.keylesspalace.tusky.appstore.PreferenceChangedEvent
 import com.keylesspalace.tusky.db.AccountManager
 import com.keylesspalace.tusky.di.Injectable
 import com.keylesspalace.tusky.entity.Account
+import com.keylesspalace.tusky.entity.Filter
 import com.keylesspalace.tusky.entity.Status
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.util.ThemeUtils
@@ -65,6 +66,10 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
     private lateinit var defaultMediaSensitivityPreference: SwitchPreference
     private lateinit var alwaysShowSensitiveMediaPreference: SwitchPreference
     private lateinit var mediaPreviewEnabledPreference: SwitchPreference
+    private lateinit var homeFiltersPreference: Preference
+    private lateinit var notificationFiltersPreference: Preference
+    private lateinit var publicFiltersPreference: Preference
+    private lateinit var threadFiltersPreference: Preference
 
     private val iconSize by lazy {resources.getDimensionPixelSize(R.dimen.preference_icon_size)}
 
@@ -79,6 +84,10 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
         defaultMediaSensitivityPreference = findPreference("defaultMediaSensitivity") as SwitchPreference
         mediaPreviewEnabledPreference = findPreference("mediaPreviewEnabled") as SwitchPreference
         alwaysShowSensitiveMediaPreference = findPreference("alwaysShowSensitiveMedia") as SwitchPreference
+        homeFiltersPreference = findPreference("homeFilters")
+        notificationFiltersPreference = findPreference("notificationFilters")
+        publicFiltersPreference = findPreference("publicFilters")
+        threadFiltersPreference = findPreference("threadFilters")
 
         notificationPreference.icon = IconicsDrawable(notificationPreference.context, GoogleMaterial.Icon.gmd_notifications).sizePx(iconSize).color(ThemeUtils.getColor(notificationPreference.context, R.attr.toolbar_icon_tint))
         mutedUsersPreference.icon = getTintedIcon(R.drawable.ic_mute_24dp)
@@ -88,12 +97,15 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
         tabPreference.onPreferenceClickListener = this
         mutedUsersPreference.onPreferenceClickListener = this
         blockedUsersPreference.onPreferenceClickListener = this
+        homeFiltersPreference.onPreferenceClickListener = this
+        notificationFiltersPreference.onPreferenceClickListener = this
+        publicFiltersPreference.onPreferenceClickListener = this
+        threadFiltersPreference.onPreferenceClickListener = this
 
         defaultPostPrivacyPreference.onPreferenceChangeListener = this
         defaultMediaSensitivityPreference.onPreferenceChangeListener = this
         mediaPreviewEnabledPreference.onPreferenceChangeListener = this
         alwaysShowSensitiveMediaPreference.onPreferenceChangeListener = this
-
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -144,7 +156,7 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
 
     override fun onPreferenceClick(preference: Preference): Boolean {
 
-        when(preference) {
+        return when(preference) {
             notificationPreference -> {
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                     val intent = Intent()
@@ -159,30 +171,42 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
                     }
 
                 }
-                return true
+                true
             }
             tabPreference -> {
                 val intent = Intent(context, TabPreferenceActivity::class.java)
                 activity?.startActivity(intent)
                 activity?.overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left)
-                return true
+                true
             }
             mutedUsersPreference -> {
                 val intent = Intent(context, AccountListActivity::class.java)
                 intent.putExtra("type", AccountListActivity.Type.MUTES)
                 activity?.startActivity(intent)
                 activity?.overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left)
-                return true
+                true
             }
             blockedUsersPreference -> {
                 val intent = Intent(context, AccountListActivity::class.java)
                 intent.putExtra("type", AccountListActivity.Type.BLOCKS)
                 activity?.startActivity(intent)
                 activity?.overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left)
-                return true
+                true
+            }
+            homeFiltersPreference -> {
+                launchFilterActivity(Filter.HOME, R.string.title_home)
+            }
+            notificationFiltersPreference -> {
+                launchFilterActivity(Filter.NOTIFICATIONS, R.string.title_notifications)
+            }
+            publicFiltersPreference -> {
+                launchFilterActivity(Filter.PUBLIC, R.string.pref_title_public_filter_keywords)
+            }
+            threadFiltersPreference -> {
+                launchFilterActivity(Filter.THREAD, R.string.pref_title_thread_filter_keywords)
             }
 
-            else -> return false
+            else -> false
         }
 
     }
@@ -249,6 +273,15 @@ class AccountPreferencesFragment : PreferenceFragmentCompat(),
         return drawable
     }
 
+    fun launchFilterActivity(filterContext: String, titleResource: Int): Boolean {
+        val intent = Intent(context, FiltersActivity::class.java)
+        intent.putExtra(FiltersActivity.FILTERS_CONTEXT, filterContext)
+        intent.putExtra(FiltersActivity.FILTERS_TITLE, getString(titleResource))
+        activity?.startActivity(intent)
+        activity?.overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left)
+        return true
+    }
+
     companion object {
         fun newInstance(): AccountPreferencesFragment {
             return AccountPreferencesFragment()

app/src/main/java/com/keylesspalace/tusky/fragment/preference/TabFilterPreferencesFragment.kt

@@ -17,14 +17,8 @@ package com.keylesspalace.tusky.fragment.preference
 
 import android.content.SharedPreferences
 import android.os.Bundle
-import androidx.appcompat.app.AlertDialog
 import androidx.preference.PreferenceFragmentCompat
-import android.text.Editable
-import android.text.TextWatcher
-import android.widget.EditText
-import androidx.preference.Preference
 import com.keylesspalace.tusky.R
-import java.util.regex.Pattern
 
 class TabFilterPreferencesFragment : PreferenceFragmentCompat() {
 
@@ -32,50 +26,7 @@ class TabFilterPreferencesFragment : PreferenceFragmentCompat() {
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         addPreferencesFromResource(R.xml.timeline_filter_preferences)
-
         sharedPreferences = preferenceManager.sharedPreferences
-
-        val regexPref: Preference = findPreference("tabFilterRegex")
-
-        regexPref.summary = sharedPreferences.getString("tabFilterRegex", "")
-        regexPref.setOnPreferenceClickListener {
-
-            val editText = EditText(requireContext())
-            editText.setText(sharedPreferences.getString("tabFilterRegex", ""))
-
-            val dialog = AlertDialog.Builder(requireContext())
-                    .setTitle(R.string.pref_title_filter_regex)
-                    .setView(editText)
-                    .setPositiveButton(android.R.string.ok) { _, _ ->
-                        sharedPreferences
-                                .edit()
-                                .putString("tabFilterRegex", editText.text.toString())
-                                .apply()
-                        regexPref.summary = editText.text.toString()
-                    }
-                    .setNegativeButton(android.R.string.cancel, null)
-                    .create()
-
-            editText.addTextChangedListener(object : TextWatcher {
-                override fun afterTextChanged(newRegex: Editable) {
-                    try {
-                        Pattern.compile(newRegex.toString())
-                        editText.error = null
-                        dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = true
-                    } catch (e: IllegalArgumentException) {
-                        editText.error = getString(R.string.error_invalid_regex)
-                        dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
-                    }
-                }
-
-                override fun beforeTextChanged(s1: CharSequence, start: Int, count: Int, after: Int) {}
-
-                override fun onTextChanged(s1: CharSequence, start: Int, before: Int, count: Int) {}
-            })
-            dialog.show()
-            true
-        }
-
     }
 
     companion object {

app/src/main/java/com/keylesspalace/tusky/network/MastodonApi.java

@@ -22,6 +22,7 @@ import com.keylesspalace.tusky.entity.Attachment;
 import com.keylesspalace.tusky.entity.Card;
 import com.keylesspalace.tusky.entity.Conversation;
 import com.keylesspalace.tusky.entity.Emoji;
+import com.keylesspalace.tusky.entity.Filter;
 import com.keylesspalace.tusky.entity.Instance;
 import com.keylesspalace.tusky.entity.MastoList;
 import com.keylesspalace.tusky.entity.Notification;
@@ -346,4 +347,37 @@ public interface MastodonApi {
 
     @GET("/api/v1/conversations")
     Call<List<Conversation>> getConversations(@Nullable @Query("max_id") String maxId, @Query("limit") int limit);
+    @GET("api/v1/filters")
+    Call<List<Filter>> getFilters();
+
+    @FormUrlEncoded
+    @POST("api/v1/filters")
+    Call<Filter> createFilter(
+            @Field("phrase") String phrase,
+            @Field("context[]") List<String> context,
+            @Field("irreversible") Boolean irreversible,
+            @Field("whole_word") Boolean wholeWord,
+            @Field("expires_in") String expiresIn
+    );
+
+    @GET("api/v1/filters/{id}")
+    Call<Filter> getFilter(
+            @Path("id") String id
+    );
+
+    @FormUrlEncoded
+    @PUT("api/v1/filters/{id}")
+    Call<Filter> updateFilter(
+            @Path("id") String id,
+            @Field("phrase") String phrase,
+            @Field("context[]") List<String> context,
+            @Field("irreversible") Boolean irreversible,
+            @Field("whole_word") Boolean wholeWord,
+            @Field("expires_in") String expiresIn
+    );
+
+    @DELETE("api/v1/filters/{id}")
+    Call<ResponseBody> deleteFilter(
+            @Path("id") String id
+    );
 }

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

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/activityFilters"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.keylesspalace.tusky.FiltersActivity">
+
+    <include layout="@layout/toolbar_basic" />
+
+    <ListView
+        android:id="@+id/filtersView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/filter_floating_add"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:contentDescription="@string/filter_addition_dialog_title"
+        app:layout_anchor="@id/filtersView"
+        app:layout_anchorGravity="bottom|end"
+        android:src="@drawable/ic_plus_24dp"
+        />
+
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingTop="16dp">
+
+    <EditText
+        android:id="@+id/phraseEditText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingEnd="24dp"
+        android:paddingStart="24dp"
+        android:hint="@string/filter_add_description"
+        app:layout_constraintTop_toTopOf="parent"
+        />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -199,6 +199,7 @@
     <string name="pref_title_appearance_settings">Appearance</string>
     <string name="pref_title_app_theme">App Theme</string>
     <string name="pref_title_timelines">Timelines</string>
+    <string name="pref_title_timeline_filters">Filters</string>
 
     <string-array name="app_theme_names">
         <item>Dark</item>
@@ -216,7 +217,6 @@
     <string name="pref_title_status_tabs">Tabs</string>
     <string name="pref_title_show_boosts">Show boosts</string>
     <string name="pref_title_show_replies">Show replies</string>
-    <string name="pref_title_filter_regex">Filter out by regular expressions</string>
     <string name="pref_title_show_media_preview">Download media previews</string>
     <string name="pref_title_proxy_settings">Proxy</string>
     <string name="pref_title_http_proxy_settings">HTTP proxy</string>
@@ -319,6 +319,14 @@
     <string name="replying_to">Replying to @%s</string>
     <string name="load_more_placeholder_text">load more</string>
 
+    <string name="pref_title_public_filter_keywords">Public timelines</string>
+    <string name="pref_title_thread_filter_keywords">Conversations</string>
+    <string name="filter_addition_dialog_title">Add filter</string>
+    <string name="filter_edit_dialog_title">Edit filter</string>
+    <string name="filter_dialog_remove_button">Remove</string>
+    <string name="filter_dialog_update_button">Update</string>
+    <string name="filter_add_description">Phrase to filter</string>
+
     <string name="add_account_name">Add Account</string>
     <string name="add_account_description">Add new Mastodon Account</string>
 

app/src/main/res/xml/account_preferences.xml

@@ -45,7 +45,23 @@
         <SwitchPreference
             android:key="alwaysShowSensitiveMedia"
             android:title="@string/pref_title_alway_show_sensitive_media" />
-
     </PreferenceCategory>
-
+    <PreferenceCategory android:title="@string/pref_title_timeline_filters">
+        <Preference
+            android:key="publicFilters"
+            android:title="@string/pref_title_public_filter_keywords"
+            />
+        <Preference
+            android:key="notificationFilters"
+            android:title="@string/title_notifications"
+            />
+        <Preference
+            android:key="homeFilters"
+            android:title="@string/title_home"
+            />
+        <Preference
+            android:key="threadFilters"
+            android:title="@string/pref_title_thread_filter_keywords"
+            />
+    </PreferenceCategory>
 </PreferenceScreen>

app/src/main/res/xml/timeline_filter_preferences.xml

@@ -17,15 +17,4 @@
             android:title="@string/pref_title_show_replies"
             app:iconSpaceReserved="false" />
     </PreferenceCategory>
-
-    <PreferenceCategory
-        android:title="@string/title_advanced"
-        app:iconSpaceReserved="false">
-        <Preference
-            android:inputType="textNoSuggestions"
-            android:key="tabFilterRegex"
-            android:title="@string/pref_title_filter_regex"
-            app:iconSpaceReserved="false" />
-    </PreferenceCategory>
-
 </PreferenceScreen>