Exclude existing group members from the add members screen

src/org/thoughtcrime/securesms/loki/activities/CreateClosedGroupActivity.kt

@@ -66,7 +66,7 @@ class CreateClosedGroupActivity : PassphraseRequiredActionBarActivity(), LoaderM
 
     // region Updating
     override fun onCreateLoader(id: Int, bundle: Bundle?): Loader<List<String>> {
-        return SelectContactsLoader(this)
+        return SelectContactsLoader(this, setOf())
     }
 
     override fun onLoadFinished(loader: Loader<List<String>>, members: List<String>) {

src/org/thoughtcrime/securesms/loki/activities/EditClosedGroupActivity.kt

@@ -180,6 +180,7 @@ class EditClosedGroupActivity : PassphraseRequiredActionBarActivity() {
 
     private fun onAddMembersClick() {
         val intent = Intent(this@EditClosedGroupActivity, SelectContactsActivity::class.java)
+        intent.putExtra(SelectContactsActivity.Companion.usersToExcludeKey, members.toTypedArray())
         startActivityForResult(intent, Companion.addUsersRequestCode)
     }
 

src/org/thoughtcrime/securesms/loki/activities/SelectContactsActivity.kt

@@ -18,12 +18,14 @@ import org.thoughtcrime.securesms.mms.GlideApp
 class SelectContactsActivity : PassphraseRequiredActionBarActivity(), LoaderManager.LoaderCallbacks<List<String>> {
     private var members = listOf<String>()
         set(value) { field = value; selectContactsAdapter.members = value }
+    private lateinit var usersToExclude: Set<String>
 
     private val selectContactsAdapter by lazy {
         SelectContactsAdapter(this, GlideApp.with(this))
     }
 
     companion object {
+        val usersToExcludeKey = "usersToExcludeKey"
         val selectedContactsKey = "selectedContactsKey"
     }
 
@@ -34,6 +36,8 @@ class SelectContactsActivity : PassphraseRequiredActionBarActivity(), LoaderMana
         setContentView(R.layout.activity_select_contacts)
         supportActionBar!!.title = resources.getString(R.string.activity_select_contacts_title)
 
+        usersToExclude = intent.getStringArrayExtra(Companion.usersToExcludeKey)?.toSet() ?: setOf()
+
         recyclerView.adapter = selectContactsAdapter
         recyclerView.layoutManager = LinearLayoutManager(this)
 
@@ -48,7 +52,7 @@ class SelectContactsActivity : PassphraseRequiredActionBarActivity(), LoaderMana
 
     // region Updating
     override fun onCreateLoader(id: Int, bundle: Bundle?): Loader<List<String>> {
-        return SelectContactsLoader(this)
+        return SelectContactsLoader(this, usersToExclude)
     }
 
     override fun onLoadFinished(loader: Loader<List<String>>, members: List<String>) {

src/org/thoughtcrime/securesms/loki/activities/SelectContactsLoader.kt

@@ -4,12 +4,12 @@ import android.content.Context
 import org.thoughtcrime.securesms.loki.utilities.ContactUtilities
 import org.thoughtcrime.securesms.util.AsyncLoader
 
-class SelectContactsLoader(context: Context) : AsyncLoader<List<String>>(context) {
+class SelectContactsLoader(context: Context, val usersToExclude: Set<String>) : AsyncLoader<List<String>>(context) {
 
     override fun loadInBackground(): List<String> {
         val contacts = ContactUtilities.getAllContacts(context)
         return contacts.filter { contact ->
-            !contact.recipient.isGroupRecipient && !contact.isOurDevice && !contact.isSlave
+            !contact.recipient.isGroupRecipient && !contact.isOurDevice && !contact.isSlave && !usersToExclude.contains(contact.recipient.address.toPhoneString())
         }.map {
             it.recipient.address.toPhoneString()
         }