Auto complete home servers

app/src/main/java/io/heckel/ntfy/ui/AddFragment.kt

@@ -6,25 +6,31 @@ import android.content.Context
 import android.os.Bundle
 import android.text.Editable
 import android.text.TextWatcher
+import android.util.Log
 import android.view.View
+import android.widget.ArrayAdapter
+import android.widget.AutoCompleteTextView
 import android.widget.Button
 import android.widget.CheckBox
 import androidx.fragment.app.DialogFragment
 import androidx.lifecycle.lifecycleScope
 import com.google.android.material.textfield.TextInputEditText
+import com.google.android.material.textfield.TextInputLayout
+import io.heckel.ntfy.BuildConfig
 import io.heckel.ntfy.R
 import io.heckel.ntfy.data.Database
 import io.heckel.ntfy.data.Repository
-import io.heckel.ntfy.BuildConfig
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
+
 class AddFragment : DialogFragment() {
     private lateinit var repository: Repository
     private lateinit var subscribeListener: SubscribeListener
 
     private lateinit var topicNameText: TextInputEditText
-    private lateinit var baseUrlText: TextInputEditText
+    private lateinit var baseUrlLayout: TextInputLayout
+    private lateinit var baseUrlText: AutoCompleteTextView
     private lateinit var useAnotherServerCheckbox: CheckBox
     private lateinit var useAnotherServerDescription: View
     private lateinit var instantDeliveryBox: View
@@ -32,6 +38,8 @@ class AddFragment : DialogFragment() {
     private lateinit var instantDeliveryDescription: View
     private lateinit var subscribeButton: Button
 
+    private lateinit var baseUrls: List<String> // List of base URLs already used, excluding app_base_url
+
     interface SubscribeListener {
         fun onSubscribe(topic: String, baseUrl: String, instant: Boolean)
     }
@@ -53,14 +61,73 @@ class AddFragment : DialogFragment() {
 
         // Build root view
         val view = requireActivity().layoutInflater.inflate(R.layout.fragment_add_dialog, null)
-        topicNameText = view.findViewById(R.id.add_dialog_topic_text) as TextInputEditText
-        baseUrlText = view.findViewById(R.id.add_dialog_base_url_text) as TextInputEditText
+        topicNameText = view.findViewById(R.id.add_dialog_topic_text)
+        baseUrlLayout = view.findViewById(R.id.add_dialog_base_url_layout)
+        baseUrlText = view.findViewById(R.id.add_dialog_base_url_text)
         instantDeliveryBox = view.findViewById(R.id.add_dialog_instant_delivery_box)
-        instantDeliveryCheckbox = view.findViewById(R.id.add_dialog_instant_delivery_checkbox) as CheckBox
+        instantDeliveryCheckbox = view.findViewById(R.id.add_dialog_instant_delivery_checkbox)
         instantDeliveryDescription = view.findViewById(R.id.add_dialog_instant_delivery_description)
-        useAnotherServerCheckbox = view.findViewById(R.id.add_dialog_use_another_server_checkbox) as CheckBox
+        useAnotherServerCheckbox = view.findViewById(R.id.add_dialog_use_another_server_checkbox)
         useAnotherServerDescription = view.findViewById(R.id.add_dialog_use_another_server_description)
 
+        // Base URL dropdown behavior; Oh my, why is this so complicated?!
+        val toggleEndIcon = {
+            if (baseUrlText.text.isNotEmpty()) {
+                baseUrlLayout.setEndIconDrawable(R.drawable.ic_cancel_gray_24dp)
+            } else if (baseUrls.isEmpty()) {
+                baseUrlLayout.setEndIconDrawable(0)
+            } else {
+                baseUrlLayout.setEndIconDrawable(R.drawable.ic_drop_down_gray_24dp)
+            }
+        }
+        baseUrlLayout.setEndIconOnClickListener {
+            if (baseUrlText.text.isNotEmpty()) {
+                baseUrlText.text.clear()
+                if (baseUrls.isEmpty()) {
+                    baseUrlLayout.setEndIconDrawable(0)
+                } else {
+                    baseUrlLayout.setEndIconDrawable(R.drawable.ic_drop_down_gray_24dp)
+                }
+            } else if (baseUrlText.text.isEmpty() && baseUrls.isNotEmpty()) {
+                baseUrlLayout.setEndIconDrawable(R.drawable.ic_drop_up_gray_24dp)
+                baseUrlText.showDropDown()
+            }
+        }
+        baseUrlText.setOnDismissListener { toggleEndIcon() }
+        baseUrlText.addTextChangedListener(object : TextWatcher {
+            override fun afterTextChanged(s: Editable?) {
+                toggleEndIcon()
+            }
+            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+                // Nothing
+            }
+            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
+                // Nothing
+            }
+        })
+
+        // Fill autocomplete for base URL
+        lifecycleScope.launch(Dispatchers.IO) {
+            // Sort existing base URLs by most frequently used
+            val appBaseUrl = getString(R.string.app_base_url)
+            baseUrls = repository.getSubscriptions()
+                .groupBy { it.baseUrl }
+                .mapValues { it.value.size }
+                .toList()
+                .sortedBy { (_, size) -> size }
+                .reversed()
+                .map { (baseUrl, _) -> baseUrl }
+                .filterNot { it == appBaseUrl }
+            val adapter = ArrayAdapter(requireActivity(), R.layout.fragment_add_dialog_dropdown_item, baseUrls)
+            requireActivity().runOnUiThread {
+                baseUrlText.threshold = 1
+                baseUrlText.setAdapter(adapter)
+                if (baseUrls.isNotEmpty()) {
+                    baseUrlText.setText(baseUrls.first())
+                }
+            }
+        }
+
         // Show/hide based on flavor
         instantDeliveryBox.visibility = if (BuildConfig.FIREBASE_AVAILABLE) View.VISIBLE else View.GONE
 
@@ -109,12 +176,12 @@ class AddFragment : DialogFragment() {
             useAnotherServerCheckbox.setOnCheckedChangeListener { _, isChecked ->
                 if (isChecked) {
                     useAnotherServerDescription.visibility = View.VISIBLE
-                    baseUrlText.visibility = View.VISIBLE
+                    baseUrlLayout.visibility = View.VISIBLE
                     instantDeliveryBox.visibility = View.GONE
                     instantDeliveryDescription.visibility = View.GONE
                 } else {
                     useAnotherServerDescription.visibility = View.GONE
-                    baseUrlText.visibility = View.GONE
+                    baseUrlLayout.visibility = View.GONE
                     instantDeliveryBox.visibility = if (BuildConfig.FIREBASE_AVAILABLE) View.VISIBLE else View.GONE
                     if (instantDeliveryCheckbox.isChecked) instantDeliveryDescription.visibility = View.VISIBLE
                     else instantDeliveryDescription.visibility = View.GONE

app/src/main/res/drawable/ic_cancel_gray_24dp.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ 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.
+-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0"
+        android:width="24dp"
+        tools:ignore="NewApi">
+    <path
+            android:fillColor="#888888"
+            android:pathData="M12 2C6.47 2 2 6.47 2 12s4.47 10 10 10 10-4.47 10-10S17.53 2 12 2zm5 13.59L15.59 17 12 13.41 8.41 17 7 15.59 10.59 12 7 8.41 8.41 7 12 10.59 15.59 7 17 8.41 13.41 12 17 15.59z"/>
+</vector>

app/src/main/res/drawable/ic_drop_down_gray_24dp.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0"
+        android:width="24dp"
+        tools:ignore="NewApi">
+    <path
+            android:fillColor="#888888"
+            android:pathData="M7 10l5 5 5-5z"/>
+</vector>

app/src/main/res/drawable/ic_drop_up_gray_24dp.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ 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.
+-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0"
+        android:width="24dp"
+        tools:ignore="NewApi">
+    <path
+            android:fillColor="#888888"
+            android:pathData="M7 14l5-5 5 5z"/>
+</vector>

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-              xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
+              xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"
+              android:layout_width="match_parent"
               android:layout_height="match_parent"
               android:orientation="vertical"
               android:paddingLeft="16dp"
@@ -37,12 +38,37 @@
             android:layout_height="wrap_content" android:id="@+id/add_dialog_use_another_server_description"
             android:paddingStart="4dp" android:paddingTop="0dp" android:layout_marginTop="-5dp"
             android:visibility="gone"/>
-    <com.google.android.material.textfield.TextInputEditText
-            android:id="@+id/add_dialog_base_url_text"
+    <com.google.android.material.textfield.TextInputLayout
+            style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox.Dense.ExposedDropdownMenu"
+            android:id="@+id/add_dialog_base_url_layout"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" android:visibility="gone"
-            android:hint="@string/app_base_url" android:inputType="textUri" android:maxLines="1"
-            android:layout_marginTop="-2dp" android:layout_marginBottom="5dp"/>
+            android:layout_height="wrap_content"
+            android:layout_margin="0dp"
+            android:background="@android:color/transparent"
+            android:padding="0dp"
+            android:visibility="gone"
+            app:endIconMode="custom"
+            app:hintEnabled="false"
+            app:boxBackgroundColor="@android:color/transparent">
+        <AutoCompleteTextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:id="@+id/add_dialog_base_url_text"
+                android:hint="@string/app_base_url"
+                android:maxLines="1"
+                android:layout_marginTop="-2dp"
+                android:layout_marginBottom="5dp"
+                android:visibility="visible"
+                android:inputType="textNoSuggestions"
+                android:textAppearance="?android:attr/textAppearanceMedium"
+                android:paddingStart="2dp"
+                android:paddingEnd="2dp"
+                android:paddingTop="10dp"
+                android:paddingBottom="0dp"
+                android:layout_marginStart="2dp"
+                android:layout_marginEnd="2dp"/>
+    </com.google.android.material.textfield.TextInputLayout>
+
     <LinearLayout
             android:orientation="horizontal"
             android:layout_width="match_parent"

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+          android:id="@android:id/text1"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:textAppearance="?android:attr/textAppearanceMedium"
+          android:textColor="?android:attr/textColorAlertDialogListItem"
+          android:gravity="center_vertical"
+          android:paddingStart="7dp"
+          android:paddingEnd="7dp"
+          android:paddingTop="7dp"
+          android:paddingBottom="7dp"
+          android:ellipsize="marquee"
+/>

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

@@ -60,8 +60,8 @@
     <string name="add_dialog_topic_name_hint">Topic name, e.g. phils_alerts</string>
     <string name="add_dialog_use_another_server">Use another server</string>
     <string name="add_dialog_use_another_server_description">
-        You can subscribe to topics from your own server. Due to platform limitations, this option requires a foreground
-        service and consumes more power, but also delivers notifications faster (even in doze mode).
+        You can subscribe to topics from your own server. This option requires a foreground service and
+        consumes more power, but also delivers notifications faster (even in doze mode).
     </string>
     <string name="add_dialog_instant_delivery">Instant delivery in doze mode</string>
     <string name="add_dialog_instant_delivery_description">