Add github login support.

app/src/main/AndroidManifest.xml

@@ -51,7 +51,7 @@
             android:theme="@style/AppTheme" />
 
         <activity
-            android:name=".webview.gitlab.ui.GitlabWebViewActivity"
+            android:name=".webview.oauth.ui.OauthWebViewActivity"
             android:windowSoftInputMode="adjustResize|stateAlwaysHidden"
             android:theme="@style/AppTheme" />
 

app/src/main/java/chat/rocket/android/authentication/login/presentation/LoginPresenter.kt

@@ -108,6 +108,8 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
         launchUI(strategy) {
             try {
                 val services = client.settingsOauth().services
+                val state = "{\"loginStyle\":\"popup\",\"credentialToken\":\"${generateRandomString(40)}\",\"isCordova\":true}".encodeToBase64()
+
                 if (services.isNotEmpty()) {
                     var totalSocialAccountsEnabled = 0
 
@@ -118,7 +120,6 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
                     if (settings.isGithubAuthenticationEnabled()) {
                         val clientId = getOauthClientId(services, SERVICE_NAME_GITHUB)
                         if (clientId != null) {
-                            val state = generateRandomString(5)
                             view.setupGithubButtonListener(UrlHelper.getGithubOauthUrl(clientId, state), state)
                             view.enableLoginByGithub()
                             totalSocialAccountsEnabled++
@@ -143,8 +144,6 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
                     if (settings.isGitlabAuthenticationEnabled()) {
                         val clientId = getOauthClientId(services, SERVICE_NAME_GILAB)
                         if (clientId != null) {
-                            // TODO: Improve this code.
-                            val state = "{\"loginStyle\":\"popup\",\"credentialToken\":\"${generateRandomString(40)}\",\"isCordova\":true}".encodeToBase64()
                             view.setupGitlabButtonListener(UrlHelper.getGitlabOauthUrl(clientId, server!!, state), state)
                             view.enableLoginByGitlab()
                             totalSocialAccountsEnabled++

app/src/main/java/chat/rocket/android/authentication/login/ui/LoginFragment.kt

@@ -21,9 +21,9 @@ import chat.rocket.android.helper.TextHelper
 import chat.rocket.android.util.extensions.*
 import chat.rocket.android.webview.cas.ui.INTENT_CAS_TOKEN
 import chat.rocket.android.webview.cas.ui.casWebViewIntent
-import chat.rocket.android.webview.gitlab.ui.INTENT_OAUTH_CREDENTIAL_SECRET
-import chat.rocket.android.webview.gitlab.ui.INTENT_OAUTH_CREDENTIAL_TOKEN
-import chat.rocket.android.webview.gitlab.ui.gitlabWebViewIntent
+import chat.rocket.android.webview.oauth.ui.INTENT_OAUTH_CREDENTIAL_SECRET
+import chat.rocket.android.webview.oauth.ui.INTENT_OAUTH_CREDENTIAL_TOKEN
+import chat.rocket.android.webview.oauth.ui.oauthWebViewIntent
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_log_in.*
 import javax.inject.Inject
@@ -210,9 +210,8 @@ class LoginFragment : Fragment(), LoginView {
 
     override fun setupGithubButtonListener(githubUrl: String, state: String) {
         button_github.setOnClickListener {
-            // TODO
-//            startActivityForResult(context?.githubWebViewIntent(url, state), REQUEST_CODE_FOR_OAUTH)
-//            activity?.overridePendingTransition(R.anim.slide_up, R.anim.hold)
+            startActivityForResult(context?.oauthWebViewIntent(githubUrl, state), REQUEST_CODE_FOR_OAUTH)
+            activity?.overridePendingTransition(R.anim.slide_up, R.anim.hold)
         }
     }
 
@@ -238,7 +237,7 @@ class LoginFragment : Fragment(), LoginView {
 
     override fun setupGitlabButtonListener(gitlabUrl: String, state: String) {
         button_gitlab.setOnClickListener {
-            startActivityForResult(context?.gitlabWebViewIntent(gitlabUrl, state), REQUEST_CODE_FOR_OAUTH)
+            startActivityForResult(context?.oauthWebViewIntent(gitlabUrl, state), REQUEST_CODE_FOR_OAUTH)
             activity?.overridePendingTransition(R.anim.slide_up, R.anim.hold)
         }
     }

app/src/main/java/chat/rocket/android/webview/gitlab/ui/GitlabWebViewActivity.kt → app/src/main/java/chat/rocket/android/webview/oauth/ui/OauthWebViewActivity.kt

-package chat.rocket.android.webview.gitlab.ui
+package chat.rocket.android.webview.oauth.ui
 
 import android.annotation.SuppressLint
 import android.app.Activity
@@ -16,8 +16,8 @@ import kotlinx.android.synthetic.main.activity_web_view.*
 import kotlinx.android.synthetic.main.app_bar.*
 import org.json.JSONObject
 
-fun Context.gitlabWebViewIntent(webPageUrl: String, state: String): Intent {
-    return Intent(this, GitlabWebViewActivity::class.java).apply {
+fun Context.oauthWebViewIntent(webPageUrl: String, state: String): Intent {
+    return Intent(this, OauthWebViewActivity::class.java).apply {
         putExtra(INTENT_WEB_PAGE_URL, webPageUrl)
         putExtra(INTENT_STATE, state)
     }
@@ -31,7 +31,7 @@ const val INTENT_OAUTH_CREDENTIAL_TOKEN = "credential_token"
 const val INTENT_OAUTH_CREDENTIAL_SECRET = "credential_secret"
 
 // Shows a WebView to the user authenticate with your Gitlab credentials.
-class GitlabWebViewActivity : AppCompatActivity() {
+class OauthWebViewActivity : AppCompatActivity() {
     private lateinit var webPageUrl: String
     private lateinit var state: String