289 lines
11 KiB
Kotlin
289 lines
11 KiB
Kotlin
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.components.login
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import android.content.Context
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import android.content.Intent
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import android.content.SharedPreferences
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import android.os.Bundle
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import android.text.method.LinkMovementMethod
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import android.util.Log
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import android.view.View
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import android.widget.TextView
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import androidx.appcompat.app.AlertDialog
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import androidx.core.net.toUri
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import androidx.lifecycle.lifecycleScope
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import com.bumptech.glide.Glide
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import com.keylesspalace.tusky.BaseActivity
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import com.keylesspalace.tusky.BuildConfig
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import com.keylesspalace.tusky.MainActivity
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import com.keylesspalace.tusky.R
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import com.keylesspalace.tusky.databinding.ActivityLoginBinding
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import com.keylesspalace.tusky.di.Injectable
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import com.keylesspalace.tusky.entity.AppCredentials
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import com.keylesspalace.tusky.network.MastodonApi
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import com.keylesspalace.tusky.util.getNonNullString
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import com.keylesspalace.tusky.util.viewBinding
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import kotlinx.coroutines.launch
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import okhttp3.HttpUrl
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import javax.inject.Inject
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/** Main login page, the first thing that users see. Has prompt for instance and login button. */
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class LoginActivity : BaseActivity(), Injectable {
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@Inject
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lateinit var mastodonApi: MastodonApi
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private val binding by viewBinding(ActivityLoginBinding::inflate)
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private lateinit var preferences: SharedPreferences
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private val oauthRedirectUri: String
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get() {
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val scheme = getString(R.string.oauth_scheme)
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val host = BuildConfig.APPLICATION_ID
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return "$scheme://$host/"
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}
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private val doWebViewAuth = registerForActivityResult(OauthLogin()) { result ->
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when (result) {
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is LoginResult.Ok -> lifecycleScope.launch {
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fetchOauthToken(result.code)
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}
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is LoginResult.Err -> {
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// Authorization failed. Put the error response where the user can read it and they
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// can try again.
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setLoading(false)
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binding.domainTextInputLayout.error = getString(R.string.error_authorization_denied)
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Log.e(
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TAG,
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"%s %s".format(
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getString(R.string.error_authorization_denied),
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result.errorMessage
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)
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)
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}
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is LoginResult.Cancel -> {
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setLoading(false)
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}
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}
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(binding.root)
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if (savedInstanceState == null &&
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BuildConfig.CUSTOM_INSTANCE.isNotBlank() &&
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!isAdditionalLogin()
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) {
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binding.domainEditText.setText(BuildConfig.CUSTOM_INSTANCE)
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binding.domainEditText.setSelection(BuildConfig.CUSTOM_INSTANCE.length)
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}
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if (BuildConfig.CUSTOM_LOGO_URL.isNotBlank()) {
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Glide.with(binding.loginLogo)
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.load(BuildConfig.CUSTOM_LOGO_URL)
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.placeholder(null)
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.into(binding.loginLogo)
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}
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preferences = getSharedPreferences(
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getString(R.string.preferences_file_key), Context.MODE_PRIVATE
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)
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binding.loginButton.setOnClickListener { onButtonClick() }
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binding.whatsAnInstanceTextView.setOnClickListener {
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val dialog = AlertDialog.Builder(this)
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.setMessage(R.string.dialog_whats_an_instance)
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.setPositiveButton(R.string.action_close, null)
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.show()
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val textView = dialog.findViewById<TextView>(android.R.id.message)
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textView?.movementMethod = LinkMovementMethod.getInstance()
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}
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if (isAdditionalLogin()) {
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setSupportActionBar(binding.toolbar)
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supportActionBar?.setDisplayHomeAsUpEnabled(true)
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supportActionBar?.setDisplayShowTitleEnabled(false)
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} else {
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binding.toolbar.visibility = View.GONE
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}
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}
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override fun requiresLogin(): Boolean {
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return false
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}
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override fun finish() {
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super.finish()
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if (isAdditionalLogin()) {
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overridePendingTransition(R.anim.slide_from_left, R.anim.slide_to_right)
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}
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}
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/**
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* Obtain the oauth client credentials for this app. This is only necessary the first time the
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* app is run on a given server instance. So, after the first authentication, they are
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* saved in SharedPreferences and every subsequent run they are simply fetched from there.
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*/
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private fun onButtonClick() {
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binding.loginButton.isEnabled = false
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binding.domainTextInputLayout.error = null
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val domain = canonicalizeDomain(binding.domainEditText.text.toString())
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try {
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HttpUrl.Builder().host(domain).scheme("https").build()
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} catch (e: IllegalArgumentException) {
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setLoading(false)
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binding.domainTextInputLayout.error = getString(R.string.error_invalid_domain)
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return
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}
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setLoading(true)
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lifecycleScope.launch {
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val credentials: AppCredentials = try {
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mastodonApi.authenticateApp(
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domain, getString(R.string.app_name), oauthRedirectUri,
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OAUTH_SCOPES, getString(R.string.tusky_website)
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)
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} catch (e: Exception) {
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binding.loginButton.isEnabled = true
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binding.domainTextInputLayout.error =
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getString(R.string.error_failed_app_registration)
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setLoading(false)
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Log.e(TAG, Log.getStackTraceString(e))
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return@launch
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}
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// Before we open browser page we save the data.
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// Even if we don't open other apps user may go to password manager or somewhere else
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// and we will need to pick up the process where we left off.
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// Alternatively we could pass it all as part of the intent and receive it back
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// but it is a bit of a workaround.
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preferences.edit()
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.putString(DOMAIN, domain)
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.putString(CLIENT_ID, credentials.clientId)
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.putString(CLIENT_SECRET, credentials.clientSecret)
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.apply()
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redirectUserToAuthorizeAndLogin(domain, credentials.clientId)
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}
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}
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private fun redirectUserToAuthorizeAndLogin(domain: String, clientId: String) {
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// To authorize this app and log in it's necessary to redirect to the domain given,
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// login there, and the server will redirect back to the app with its response.
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val url = HttpUrl.Builder()
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.scheme("https")
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.host(domain)
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.addPathSegments(MastodonApi.ENDPOINT_AUTHORIZE)
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.addQueryParameter("client_id", clientId)
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.addQueryParameter("redirect_uri", oauthRedirectUri)
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.addQueryParameter("response_type", "code")
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.addQueryParameter("scope", OAUTH_SCOPES)
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.build()
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doWebViewAuth.launch(LoginData(url.toString().toUri(), oauthRedirectUri.toUri()))
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}
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override fun onStart() {
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super.onStart()
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// first show or user cancelled login
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setLoading(false)
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}
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private suspend fun fetchOauthToken(code: String) {
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/* restore variables from SharedPreferences */
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val domain = preferences.getNonNullString(DOMAIN, "")
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val clientId = preferences.getNonNullString(CLIENT_ID, "")
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val clientSecret = preferences.getNonNullString(CLIENT_SECRET, "")
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setLoading(true)
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val accessToken = try {
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mastodonApi.fetchOAuthToken(
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domain, clientId, clientSecret, oauthRedirectUri, code,
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"authorization_code"
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)
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} catch (e: Exception) {
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setLoading(false)
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binding.domainTextInputLayout.error =
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getString(R.string.error_retrieving_oauth_token)
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Log.e(
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TAG,
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"%s %s".format(getString(R.string.error_retrieving_oauth_token), e.message),
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)
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return
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}
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accountManager.addAccount(accessToken.accessToken, domain)
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val intent = Intent(this, MainActivity::class.java)
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intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
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startActivity(intent)
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finish()
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overridePendingTransition(R.anim.explode, R.anim.explode)
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}
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private fun setLoading(loadingState: Boolean) {
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if (loadingState) {
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binding.loginLoadingLayout.visibility = View.VISIBLE
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binding.loginInputLayout.visibility = View.GONE
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} else {
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binding.loginLoadingLayout.visibility = View.GONE
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binding.loginInputLayout.visibility = View.VISIBLE
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binding.loginButton.isEnabled = true
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}
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}
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private fun isAdditionalLogin(): Boolean {
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return intent.getBooleanExtra(LOGIN_MODE, false)
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}
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companion object {
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private const val TAG = "LoginActivity" // logging tag
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private const val OAUTH_SCOPES = "read write follow"
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private const val LOGIN_MODE = "LOGIN_MODE"
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private const val DOMAIN = "domain"
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private const val CLIENT_ID = "clientId"
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private const val CLIENT_SECRET = "clientSecret"
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@JvmStatic
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fun getIntent(context: Context, mode: Boolean): Intent {
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val loginIntent = Intent(context, LoginActivity::class.java)
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loginIntent.putExtra(LOGIN_MODE, mode)
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return loginIntent
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}
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/** Make sure the user-entered text is just a fully-qualified domain name. */
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private fun canonicalizeDomain(domain: String): String {
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// Strip any schemes out.
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var s = domain.replaceFirst("http://", "")
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s = s.replaceFirst("https://", "")
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// If a username was included (e.g. username@example.com), just take what's after the '@'.
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val at = s.lastIndexOf('@')
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if (at != -1) {
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s = s.substring(at + 1)
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}
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return s.trim { it <= ' ' }
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}
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}
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}
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