Adds API_Gitlab_URL setting.

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

@@ -187,7 +187,21 @@ class LoginPresenter @Inject constructor(
                     if (settings.isGitlabAuthenticationEnabled()) {
                         val clientId = getOauthClientId(services, SERVICE_NAME_GILAB)
                         if (clientId != null) {
-                            view.setupGitlabButtonListener(OauthHelper.getGitlabOauthUrl(clientId, currentServer, state), state)
+                            val gitlabOauthUrl = if (settings.gitlabUrl() != null) {
+                                OauthHelper.getGitlabOauthUrl(
+                                    host = settings.gitlabUrl(),
+                                    clientId = clientId,
+                                    serverUrl = currentServer,
+                                    state = state
+                                )
+                            } else {
+                                OauthHelper.getGitlabOauthUrl(
+                                    clientId = clientId,
+                                    serverUrl = currentServer,
+                                    state = state
+                                )
+                            }
+                            view.setupGitlabButtonListener(gitlabOauthUrl, state)
                             view.enableLoginByGitlab()
                             totalSocialAccountsEnabled++
                         }

app/src/main/java/chat/rocket/android/helper/OauthHelper.kt

@@ -54,13 +54,20 @@ object OauthHelper {
     /**
      * Returns the Gitlab Oauth URL.
      *
+     * @param host The Gitlab host.
      * @param clientId The Gitlab client ID.
      * @param serverUrl The server URL.
      * @param state An unguessable random string used to protect against forgery attacks.
      * @return The Gitlab Oauth URL.
      */
-    fun getGitlabOauthUrl(clientId: String, serverUrl: String, state: String): String {
-        return  "https://gitlab.com/oauth/authorize" +
+    fun getGitlabOauthUrl(
+        host: String? = "https://gitlab.com",
+        clientId: String,
+        serverUrl: String,
+        state: String
+    ): String {
+        return host +
+                "/oauth/authorize" +
                 "?client_id=$clientId" +
                 "&redirect_uri=${serverUrl.removeTrailingSlash()}/_oauth/gitlab?close" +
                 "&state=$state" +

app/src/main/java/chat/rocket/android/server/domain/RefreshSettingsInteractor.kt

@@ -8,15 +8,17 @@ import kotlinx.coroutines.experimental.async
 import kotlinx.coroutines.experimental.withContext
 import javax.inject.Inject
 
-class RefreshSettingsInteractor @Inject constructor(private val factory: RocketChatClientFactory,
-                                                    private val repository: SettingsRepository) {
+class RefreshSettingsInteractor @Inject constructor(
+    private val factory: RocketChatClientFactory,
+    private val repository: SettingsRepository
+) {
 
     private var settingsFilter = arrayOf(
         LDAP_ENABLE, CAS_ENABLE, CAS_LOGIN_URL,
 
         ACCOUNT_REGISTRATION, ACCOUNT_LOGIN_FORM, ACCOUNT_PASSWORD_RESET, ACCOUNT_CUSTOM_FIELDS,
         ACCOUNT_GOOGLE, ACCOUNT_FACEBOOK, ACCOUNT_GITHUB, ACCOUNT_LINKEDIN, ACCOUNT_METEOR,
-        ACCOUNT_TWITTER, ACCOUNT_WORDPRESS, ACCOUNT_GITLAB,
+        ACCOUNT_TWITTER, ACCOUNT_WORDPRESS, ACCOUNT_GITLAB, ACCOUNT_GITLAB_URL,
 
         SITE_URL, SITE_NAME, FAVICON_512, FAVICON_196, USE_REALNAME, ALLOW_ROOM_NAME_SPECIAL_CHARS,
         FAVORITE_ROOMS, UPLOAD_STORAGE_TYPE, UPLOAD_MAX_FILE_SIZE, UPLOAD_WHITELIST_MIMETYPES,

app/src/main/java/chat/rocket/android/server/domain/SettingsRepository.kt

@@ -26,6 +26,7 @@ const val ACCOUNT_METEOR = "Accounts_OAuth_Meteor"
 const val ACCOUNT_TWITTER = "Accounts_OAuth_Twitter"
 const val ACCOUNT_WORDPRESS = "Accounts_OAuth_Wordpress"
 const val ACCOUNT_GITLAB = "Accounts_OAuth_Gitlab"
+const val ACCOUNT_GITLAB_URL = "API_Gitlab_URL"
 
 const val SITE_URL = "Site_Url"
 const val SITE_NAME = "Site_Name"
@@ -68,6 +69,7 @@ fun PublicSettings.isLinkedinAuthenticationEnabled(): Boolean = this[ACCOUNT_LIN
 fun PublicSettings.isMeteorAuthenticationEnabled(): Boolean = this[ACCOUNT_METEOR]?.value == true
 fun PublicSettings.isTwitterAuthenticationEnabled(): Boolean = this[ACCOUNT_TWITTER]?.value == true
 fun PublicSettings.isGitlabAuthenticationEnabled(): Boolean = this[ACCOUNT_GITLAB]?.value == true
+fun PublicSettings.gitlabUrl(): String? = this[ACCOUNT_GITLAB_URL]?.value as String?
 fun PublicSettings.isWordpressAuthenticationEnabled(): Boolean = this[ACCOUNT_WORDPRESS]?.value == true
 
 fun PublicSettings.useRealName(): Boolean = this[USE_REALNAME]?.value == true