rick roll instead of logging in on selected domains

app/src/main/java/com/keylesspalace/tusky/LoginActivity.kt

@@ -33,6 +33,7 @@ import com.keylesspalace.tusky.di.Injectable
 import com.keylesspalace.tusky.entity.AccessToken
 import com.keylesspalace.tusky.entity.AppCredentials
 import com.keylesspalace.tusky.network.MastodonApi
+import com.keylesspalace.tusky.util.RickRoll
 import com.keylesspalace.tusky.util.ThemeUtils
 import kotlinx.android.synthetic.main.activity_login.*
 import okhttp3.HttpUrl
@@ -138,6 +139,11 @@ class LoginActivity : BaseActivity(), Injectable {
             return
         }
 
+        if (RickRoll.shouldRickRoll(this, domain)) {
+            RickRoll.rickRoll(this)
+            return
+        }
+
         val callback = object : Callback<AppCredentials> {
             override fun onResponse(call: Call<AppCredentials>,
                                     response: Response<AppCredentials>) {

app/src/main/java/com/keylesspalace/tusky/util/RickRoll.kt

@@ -0,0 +1,20 @@
+package com.keylesspalace.tusky.util
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import com.keylesspalace.tusky.R
+
+object RickRoll {
+    fun shouldRickRoll(context: Context, domain: String) =
+            context.resources.getStringArray(R.array.rick_roll_domains).contains(domain)
+
+    fun rickRoll(context: Context) {
+        val uri = Uri.parse(context.getString(R.string.rick_roll_url))
+        val intent = Intent(Intent.ACTION_VIEW, uri).apply {
+            addCategory(Intent.CATEGORY_BROWSABLE)
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+        context.startActivity(intent)
+    }
+}

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

@@ -105,4 +105,9 @@
         %1$s; %2$s; %3$s, %13$s %4$s, %5$s; %6$s, %7$s, %8$s, %9$s; %10$s, %11$s, %12$s
     </string>
 
+    <string-array name="rick_roll_domains" translatable="false">
+        <item>gab.com</item>
+    </string-array>
+
+    <string name="rick_roll_url">https://www.youtube.com/watch?v=dQw4w9WgXcQ</string>
 </resources>