Send MMS attachments separately

If the message contains text, it is sent with the last attachment.

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -1228,8 +1228,9 @@ class ThreadActivity : SimpleActivity() {
             sendMessageCompat(text, addresses, subscriptionId, attachments)
             ensureBackgroundThread {
                 val messageIds = messages.map { it.id }
-                val message = getMessages(threadId, getImageResolutions = true, limit = 1).firstOrNull { it.id !in messageIds }
+                val messages = getMessages(threadId, getImageResolutions = true, limit = maxOf(1, attachments.size))
-                if (message != null) {
+                    .filter { it.id !in messageIds }
+                for (message in messages) {
                     insertOrUpdateMessage(message)
                 }
             }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/messaging/Messaging.kt

@@ -40,7 +40,16 @@ fun Context.sendMessageCompat(text: String, addresses: List<String>, subId: Int?
 
     val isMms = attachments.isNotEmpty() || isLongMmsMessage(text, settings) || addresses.size > 1 && settings.group
     if (isMms) {
-        messagingUtils.sendMmsMessage(text, addresses, attachments, settings)
+        // we send all MMS attachments separately to reduces the chances of hitting provider MMS limit.
+        if (attachments.size > 1) {
+            for (i in 0 until attachments.lastIndex - 1) {
+                val attachment = attachments[i]
+                messagingUtils.sendMmsMessage("", addresses, listOf(attachment), settings)
+            }
+        }
+
+        val lastAttachment = attachments[attachments.lastIndex]
+        messagingUtils.sendMmsMessage(text, addresses, listOf(lastAttachment), settings)
     } else {
         try {
             messagingUtils.sendSmsMessage(text, addresses.toSet(), settings.subscriptionId, settings.deliveryReports)