Password protection

app/src/main/AndroidManifest.xml

@@ -69,8 +69,12 @@
 				<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
 			</intent-filter>
 		</activity>
-		<activity android:name=".ui.search.global.GlobalSearchActivity"
+		<activity
+			android:name=".ui.search.global.GlobalSearchActivity"
 			android:label="@string/search" />
+		<activity
+			android:name=".ui.utils.protect.ProtectActivity"
+			android:windowSoftInputMode="adjustResize" />
 
 		<service
 			android:name=".ui.download.DownloadService"

app/src/main/java/org/koitharu/kotatsu/core/exceptions/WrongPasswordException.kt

@@ -0,0 +1,3 @@
+package org.koitharu.kotatsu.core.exceptions
+
+class WrongPasswordException : SecurityException()

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -92,7 +92,13 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 		setOf(TRACK_FAVOURITES, TRACK_HISTORY)
 	)
 
-	private var sourcesOrderStr by NullableStringPreferenceDelegate(resources.getString(R.string.key_sources_order))
+	var appPassword by NullableStringPreferenceDelegate(
+		resources.getString(R.string.key_app_password)
+	)
+
+	private var sourcesOrderStr by NullableStringPreferenceDelegate(
+		resources.getString(R.string.key_sources_order)
+	)
 
 	var sourcesOrder: List<Int>
 		get() = sourcesOrderStr?.split('|')?.mapNotNull(String::toIntOrNull).orEmpty()

app/src/main/java/org/koitharu/kotatsu/domain/history/OnHistoryChangeListener.kt

@@ -1,6 +1,6 @@
 package org.koitharu.kotatsu.domain.history
 
-interface OnHistoryChangeListener {
+fun interface OnHistoryChangeListener {
 
 	fun onHistoryChanged()
 }

app/src/main/java/org/koitharu/kotatsu/ui/common/dialog/StorageSelectDialog.kt

@@ -78,7 +78,7 @@ class StorageSelectDialog private constructor(private val delegate: AlertDialog)
 
 	}
 
-	interface OnStorageSelectListener {
+	fun interface OnStorageSelectListener {
 
 		fun onStorageSelected(file: File)
 	}

app/src/main/java/org/koitharu/kotatsu/ui/common/dialog/TextInputDialog.kt

@@ -61,18 +61,29 @@ class TextInputDialog private constructor(private val delegate: AlertDialog) :
 			return this
 		}
 
-		fun setPositiveButton(@StringRes textId: Int, listener: (DialogInterface, String) -> Unit): Builder {
+		fun setPositiveButton(
+			@StringRes textId: Int,
+			listener: (DialogInterface, String) -> Unit
+		): Builder {
 			delegate.setPositiveButton(textId) { dialog, _ ->
 				listener(dialog, view.inputEdit.text?.toString().orEmpty())
 			}
 			return this
 		}
 
-		fun setNegativeButton(@StringRes textId: Int, listener: DialogInterface.OnClickListener? = null): Builder {
+		fun setNegativeButton(
+			@StringRes textId: Int,
+			listener: DialogInterface.OnClickListener? = null
+		): Builder {
 			delegate.setNegativeButton(textId, listener)
 			return this
 		}
 
+		fun setOnCancelListener(listener: DialogInterface.OnCancelListener): Builder {
+			delegate.setOnCancelListener(listener)
+			return this
+		}
+
 		fun create() =
 			TextInputDialog(delegate.create())
 

app/src/main/java/org/koitharu/kotatsu/ui/common/widgets/CheckableImageView.kt

@@ -54,7 +54,7 @@ class CheckableImageView @JvmOverloads constructor(
 		return state
 	}
 
-	interface OnCheckedChangeListener {
+	fun interface OnCheckedChangeListener {
 
 		fun onCheckedChanged(view: CheckableImageView, isChecked: Boolean)
 	}

app/src/main/java/org/koitharu/kotatsu/ui/list/MainActivity.kt

@@ -35,6 +35,7 @@ import org.koitharu.kotatsu.ui.search.SearchHelper
 import org.koitharu.kotatsu.ui.settings.AppUpdateChecker
 import org.koitharu.kotatsu.ui.settings.SettingsActivity
 import org.koitharu.kotatsu.ui.tracker.TrackWorker
+import org.koitharu.kotatsu.ui.utils.protect.AppProtectHelper
 import org.koitharu.kotatsu.utils.ext.getDisplayMessage
 import org.koitharu.kotatsu.utils.ext.resolveDp
 import java.io.Closeable
@@ -71,6 +72,9 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 		} ?: run {
 			openDefaultSection()
 		}
+		if (AppProtectHelper.check(this)) {
+			return
+		}
 		TrackWorker.setup(applicationContext)
 		AppUpdateChecker(this).invoke()
 	}
@@ -78,6 +82,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 	override fun onDestroy() {
 		closeable?.close()
 		settings.unsubscribe(this)
+		AppProtectHelper.lock()
 		super.onDestroy()
 	}
 

app/src/main/java/org/koitharu/kotatsu/ui/list/filter/OnFilterChangedListener.kt

@@ -2,7 +2,7 @@ package org.koitharu.kotatsu.ui.list.filter
 
 import org.koitharu.kotatsu.core.model.MangaFilter
 
-interface OnFilterChangedListener {
+fun interface OnFilterChangedListener {
 
 	fun onFilterChanged(filter: MangaFilter)
 }

app/src/main/java/org/koitharu/kotatsu/ui/reader/ChaptersDialog.kt

@@ -55,7 +55,7 @@ class ChaptersDialog : AlertDialogFragment(R.layout.dialog_chapters),
 		}
 	}
 
-	interface OnChapterChangeListener {
+	fun interface OnChapterChangeListener {
 
 		fun onChapterChanged(chapter: MangaChapter)
 	}

app/src/main/java/org/koitharu/kotatsu/ui/reader/thumbnails/OnPageSelectListener.kt

@@ -2,7 +2,7 @@ package org.koitharu.kotatsu.ui.reader.thumbnails
 
 import org.koitharu.kotatsu.core.model.MangaPage
 
-interface OnPageSelectListener {
+fun interface OnPageSelectListener {
 
-    fun onPageSelected(page: MangaPage)
+	fun onPageSelected(page: MangaPage)
 }

app/src/main/java/org/koitharu/kotatsu/ui/settings/MainSettingsFragment.kt

@@ -1,26 +1,28 @@
 package org.koitharu.kotatsu.ui.settings
 
+import android.content.DialogInterface
 import android.content.Intent
 import android.content.SharedPreferences
 import android.os.Build
 import android.os.Bundle
 import android.provider.Settings
+import android.text.InputType
 import android.view.View
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.collection.arrayMapOf
-import androidx.preference.MultiSelectListPreference
-import androidx.preference.Preference
-import androidx.preference.PreferenceScreen
-import androidx.preference.SeekBarPreference
+import androidx.preference.*
+import com.google.android.material.snackbar.Snackbar
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.prefs.ListMode
 import org.koitharu.kotatsu.ui.common.BasePreferenceFragment
 import org.koitharu.kotatsu.ui.common.dialog.StorageSelectDialog
+import org.koitharu.kotatsu.ui.common.dialog.TextInputDialog
 import org.koitharu.kotatsu.ui.list.ListModeSelectDialog
 import org.koitharu.kotatsu.ui.settings.utils.MultiSummaryProvider
 import org.koitharu.kotatsu.ui.tracker.TrackWorker
 import org.koitharu.kotatsu.utils.ext.getStorageName
+import org.koitharu.kotatsu.utils.ext.md5
 import java.io.File
 
 
@@ -50,6 +52,8 @@ class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 			summary = settings.getStorageDir(context)?.getStorageName(context)
 				?: getString(R.string.not_available)
 		}
+		findPreference<SwitchPreference>(R.string.key_protect_app)?.isChecked =
+			!settings.appPassword.isNullOrEmpty()
 	}
 
 	override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String?) {
@@ -114,6 +118,14 @@ class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 					.show()
 				true
 			}
+			getString(R.string.key_protect_app) -> {
+				if ((preference as? SwitchPreference ?: return false).isChecked) {
+					enableAppProtection(preference)
+				} else {
+					settings.appPassword = null
+				}
+				true
+			}
 			else -> super.onPreferenceTreeClick(preference)
 		}
 	}
@@ -122,6 +134,56 @@ class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 		settings.setStorageDir(context ?: return, file)
 	}
 
+	private fun enableAppProtection(preference: SwitchPreference) {
+		val ctx = preference.context ?: return
+		val cancelListener =
+			object : DialogInterface.OnCancelListener, DialogInterface.OnClickListener {
+
+				override fun onCancel(dialog: DialogInterface?) {
+					settings.appPassword = null
+					preference.isChecked = false
+					preference.isEnabled = true
+				}
+
+				override fun onClick(dialog: DialogInterface?, which: Int) = onCancel(dialog)
+			}
+		preference.isEnabled = false
+		TextInputDialog.Builder(ctx)
+			.setInputType(InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_VARIATION_PASSWORD)
+			.setHint(R.string.enter_password)
+			.setNegativeButton(android.R.string.cancel, cancelListener)
+			.setOnCancelListener(cancelListener)
+			.setPositiveButton(android.R.string.ok) { d, password ->
+				if (password.isBlank()) {
+					cancelListener.onCancel(d)
+					return@setPositiveButton
+				}
+				TextInputDialog.Builder(ctx)
+					.setInputType(InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_VARIATION_PASSWORD)
+					.setHint(R.string.repeat_password)
+					.setNegativeButton(android.R.string.cancel, cancelListener)
+					.setOnCancelListener(cancelListener)
+					.setPositiveButton(android.R.string.ok) { d2, password2 ->
+						if (password == password2) {
+							settings.appPassword = password.md5()
+							preference.isChecked = true
+							preference.isEnabled = true
+						} else {
+							cancelListener.onCancel(d2)
+							Snackbar.make(
+								listView,
+								R.string.passwords_mismatch,
+								Snackbar.LENGTH_SHORT
+							).show()
+						}
+					}.setTitle(preference.title)
+					.create()
+					.show()
+			}.setTitle(preference.title)
+			.create()
+			.show()
+	}
+
 	private companion object {
 
 		val LIST_MODES = arrayMapOf(

app/src/main/java/org/koitharu/kotatsu/ui/utils/protect/AppProtectHelper.kt

@@ -0,0 +1,38 @@
+package org.koitharu.kotatsu.ui.utils.protect
+
+import android.app.Activity
+import android.content.Intent
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.ui.list.MainActivity
+
+object AppProtectHelper : KoinComponent {
+
+	val settings by inject<AppSettings>()
+	private var isUnlocked = settings.appPassword.isNullOrEmpty()
+
+	fun unlock(activity: Activity) {
+		isUnlocked = true
+		with(activity) {
+			startActivity(Intent(this, MainActivity::class.java))
+			finishAfterTransition()
+		}
+	}
+
+	fun lock() {
+		isUnlocked = settings.appPassword.isNullOrEmpty()
+	}
+
+	fun check(activity: Activity): Boolean {
+		return if (!isUnlocked) {
+			with(activity) {
+				startActivity(ProtectActivity.newIntent(this))
+				finishAfterTransition()
+			}
+			true
+		} else {
+			false
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/utils/protect/ProtectActivity.kt

@@ -0,0 +1,80 @@
+package org.koitharu.kotatsu.ui.utils.protect
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.KeyEvent
+import android.view.Menu
+import android.view.MenuItem
+import android.view.inputmethod.EditorInfo
+import android.widget.TextView
+import kotlinx.android.synthetic.main.activity_protect.*
+import moxy.ktx.moxyPresenter
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.ui.common.BaseActivity
+import org.koitharu.kotatsu.utils.ext.getDisplayMessage
+
+class ProtectActivity : BaseActivity(), ProtectView, TextView.OnEditorActionListener, TextWatcher {
+
+	private val presenter by moxyPresenter(factory = ::ProtectPresenter)
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_protect)
+		edit_password.setOnEditorActionListener(this)
+		edit_password.addTextChangedListener(this)
+		supportActionBar?.run {
+			setDisplayHomeAsUpEnabled(true)
+			setHomeAsUpIndicator(R.drawable.ic_cross)
+		}
+	}
+
+	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+		menuInflater.inflate(R.menu.opt_protect, menu)
+		return super.onCreateOptionsMenu(menu)
+	}
+
+	override fun onOptionsItemSelected(item: MenuItem) = when (item.itemId) {
+		R.id.action_done -> {
+			presenter.tryUnlock(edit_password.text?.toString().orEmpty())
+			true
+		}
+		else -> super.onOptionsItemSelected(item)
+	}
+
+	override fun onEditorAction(v: TextView?, actionId: Int, event: KeyEvent?): Boolean {
+		return if (actionId == EditorInfo.IME_ACTION_DONE) {
+			presenter.tryUnlock(edit_password.text?.toString().orEmpty())
+			true
+		} else {
+			false
+		}
+	}
+
+	override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
+
+	override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) = Unit
+
+	override fun afterTextChanged(s: Editable?) {
+		layout_password.error = null
+	}
+
+	override fun onUnlockSuccess() {
+		AppProtectHelper.unlock(this)
+	}
+
+	override fun onError(e: Throwable) {
+		layout_password.error = e.getDisplayMessage(resources)
+	}
+
+	override fun onLoadingStateChanged(isLoading: Boolean) {
+		layout_password.isEnabled = !isLoading
+	}
+
+	companion object {
+
+		fun newIntent(context: Context) = Intent(context, ProtectActivity::class.java)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/utils/protect/ProtectPresenter.kt

@@ -0,0 +1,31 @@
+package org.koitharu.kotatsu.ui.utils.protect
+
+import kotlinx.coroutines.delay
+import org.koin.core.component.inject
+import org.koitharu.kotatsu.core.exceptions.WrongPasswordException
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.ui.common.BasePresenter
+import org.koitharu.kotatsu.utils.ext.md5
+
+class ProtectPresenter : BasePresenter<ProtectView>() {
+
+	private val settings by inject<AppSettings>()
+
+	fun tryUnlock(password: String) {
+		launchLoadingJob {
+			val passwordHash = password.md5()
+			val appPasswordHash = settings.appPassword
+			if (passwordHash == appPasswordHash) {
+				viewState.onUnlockSuccess()
+			} else {
+				delay(PASSWORD_COMPARE_DELAY)
+				throw WrongPasswordException()
+			}
+		}
+	}
+
+	private companion object {
+
+		const val PASSWORD_COMPARE_DELAY = 1_000L
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/utils/protect/ProtectView.kt

@@ -0,0 +1,10 @@
+package org.koitharu.kotatsu.ui.utils.protect
+
+import moxy.viewstate.strategy.alias.SingleState
+import org.koitharu.kotatsu.ui.common.BaseMvpView
+
+interface ProtectView : BaseMvpView {
+
+	@SingleState
+	fun onUnlockSuccess()
+}

app/src/main/java/org/koitharu/kotatsu/utils/ext/CommonExt.kt

@@ -7,6 +7,7 @@ import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.EmptyHistoryException
 import org.koitharu.kotatsu.core.exceptions.UnsupportedFileException
+import org.koitharu.kotatsu.core.exceptions.WrongPasswordException
 import java.net.SocketTimeoutException
 
 inline fun <T, R> T.safe(action: T.() -> R?) = try {
@@ -39,6 +40,7 @@ fun Throwable.getDisplayMessage(resources: Resources) = when (this) {
 	is UnsupportedFileException -> resources.getString(R.string.text_file_not_supported)
 	is EmptyHistoryException -> resources.getString(R.string.history_is_empty)
 	is SocketTimeoutException -> resources.getString(R.string.network_error)
+	is WrongPasswordException -> resources.getString(R.string.wrong_password)
 	else -> message ?: resources.getString(R.string.error_occurred)
 }
 

app/src/main/java/org/koitharu/kotatsu/utils/ext/StringExt.kt

@@ -1,7 +1,9 @@
 package org.koitharu.kotatsu.utils.ext
 
 import android.net.Uri
+import java.math.BigInteger
 import java.net.URLEncoder
+import java.security.MessageDigest
 import java.util.*
 
 fun String.longHashCode(): Long {
@@ -100,4 +102,11 @@ fun ByteArray.byte2HexFormatted(): String? {
 		}
 	}
 	return str.toString()
+}
+
+fun String.md5(): String {
+	val md = MessageDigest.getInstance("MD5")
+	return BigInteger(1, md.digest(toByteArray()))
+		.toString(16)
+		.padStart(32, '0')
 }

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

@@ -0,0 +1,47 @@
+<?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"
+	android:layout_height="match_parent"
+	android:orientation="vertical">
+
+	<com.google.android.material.appbar.AppBarLayout
+		android:id="@+id/appbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?colorPrimary"
+		android:theme="@style/AppToolbarTheme">
+
+		<com.google.android.material.appbar.MaterialToolbar
+			android:id="@id/toolbar"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			app:layout_scrollFlags="scroll|enterAlways"
+			app:popupTheme="@style/AppPopupTheme" />
+
+	</com.google.android.material.appbar.AppBarLayout>
+
+	<com.google.android.material.textfield.TextInputLayout
+		android:id="@+id/layout_password"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_gravity="center"
+		android:layout_margin="20dp"
+		app:boxBackgroundColor="@android:color/transparent"
+		app:boxBackgroundMode="filled"
+		app:endIconMode="password_toggle"
+		app:errorEnabled="true"
+		app:errorTextColor="@color/error">
+
+		<com.google.android.material.textfield.TextInputEditText
+			android:id="@+id/edit_password"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:hint="@string/enter_password"
+			android:imeOptions="actionDone"
+			android:inputType="textPassword" />
+
+	</com.google.android.material.textfield.TextInputLayout>
+
+</LinearLayout>

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

@@ -21,7 +21,6 @@
 			android:layout_width="match_parent"
 			android:layout_height="wrap_content"
 			android:imeOptions="actionDone"
-			android:maxLines="1"
 			android:singleLine="true"
 			tools:text="@tools:sample/lorem[2]" />
 

app/src/main/res/menu/opt_protect.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto">
+
+	<item
+		android:id="@+id/action_done"
+		android:icon="@drawable/ic_done"
+		android:orderInCategory="0"
+		android:title="@string/done"
+		app:showAsAction="ifRoom|withText" />
+</menu>

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

@@ -147,4 +147,10 @@
 	<string name="feed_will_update_soon">Обновление скоро начнётся</string>
 	<string name="track_sources">Проверять обновления манги</string>
 	<string name="dont_check">Не проверять</string>
+	<string name="enter_password">Введите пароль</string>
+	<string name="wrong_password">Неверный пароль</string>
+	<string name="protect_application">Защитить приложение</string>
+	<string name="protect_application_summary">Запрашивать пароль при запуске приложения</string>
+	<string name="repeat_password">Повторите пароль</string>
+	<string name="passwords_mismatch">Пароли не совпадают</string>
 </resources>

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

@@ -23,6 +23,8 @@
 	<string name="key_notifications_vibrate">notifications_vibrate</string>
 	<string name="key_notifications_light">notifications_light</string>
 	<string name="key_reader_animation">reader_animation</string>
+	<string name="key_app_password">app_password</string>
+	<string name="key_protect_app">protect_app</string>
 
 	<string name="key_parser_domain">domain</string>
 	<string name="key_parser_ssl">ssl</string>

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

@@ -148,4 +148,10 @@
 	<string name="feed_will_update_soon">Feed update will start soon</string>
 	<string name="track_sources">Check updates for manga</string>
 	<string name="dont_check">Don`t check</string>
+	<string name="enter_password">Enter password</string>
+	<string name="wrong_password">Wrong password</string>
+	<string name="protect_application">Protect application</string>
+	<string name="protect_application_summary">Ask for password on application start</string>
+	<string name="repeat_password">Repeat password</string>
+	<string name="passwords_mismatch">Passwords do not match</string>
 </resources>

app/src/main/res/xml/pref_main.xml

@@ -48,6 +48,13 @@
 		android:title="@string/history_and_cache"
 		app:iconSpaceReserved="false" />
 
+	<SwitchPreference
+		android:key="@string/key_protect_app"
+		android:persistent="false"
+		android:summary="@string/protect_application_summary"
+		android:title="@string/protect_application"
+		app:iconSpaceReserved="false" />
+
 	<MultiSelectListPreference
 		android:defaultValue="@array/values_reader_switchers_default"
 		android:entries="@array/reader_switchers"
@@ -57,7 +64,7 @@
 		app:allowDividerAbove="true"
 		app:iconSpaceReserved="false" />
 
-	<SwitchPreferenceCompat
+	<SwitchPreference
 		android:defaultValue="false"
 		android:key="@string/key_reader_animation"
 		android:title="@string/pages_animation"