Added additional types for txt or xml and moved import logic to Importer

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

@@ -28,6 +28,7 @@ import kotlin.system.exitProcess
 class SettingsActivity : SimpleActivity() {
     private var blockedNumbersAtPause = -1
     private val messagesFileType = "application/json"
+    private val messageImportFileType = "application/json, application/xml, text/plain"
 
     override fun onCreate(savedInstanceState: Bundle?) {
         isMaterialActivity = true
@@ -83,7 +84,13 @@ class SettingsActivity : SimpleActivity() {
     private val getContent = registerForActivityResult(ActivityResultContracts.GetContent()) { uri ->
         if (uri != null) {
             toast(R.string.importing)
-            importMessages(uri)
+            MessagesImporter(this).importMessages(uri) { deserializedList ->
+                if (deserializedList.isEmpty()) {
+                    toast(R.string.no_entries_for_importing)
+                } else {
+                    ImportMessagesDialog(this, deserializedList)
+                }
+            }
         }
     }
 
@@ -104,7 +111,7 @@ class SettingsActivity : SimpleActivity() {
 
     private fun setupMessagesImport() {
         settings_import_messages_holder.setOnClickListener {
-            getContent.launch(messagesFileType)
+            getContent.launch(messageImportFileType)
         }
     }
 
@@ -131,27 +138,6 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
-    private fun importMessages(uri: Uri) {
-        try {
-            val jsonString = contentResolver.openInputStream(uri)!!.use { inputStream ->
-                inputStream.bufferedReader().readText()
-            }
-
-            val deserializedList = Json.decodeFromString<List<MessagesBackup>>(jsonString)
-            if (deserializedList.isEmpty()) {
-                toast(R.string.no_entries_for_importing)
-                return
-            }
-            ImportMessagesDialog(this, deserializedList)
-        } catch (e: SerializationException) {
-            toast(R.string.invalid_file_format)
-        } catch (e: IllegalArgumentException) {
-            toast(R.string.invalid_file_format)
-        } catch (e: Exception) {
-            showErrorToast(e)
-        }
-    }
-
     override fun onPause() {
         super.onPause()
         blockedNumbersAtPause = getBlockedNumbers().hashCode()

app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ImportMessagesDialog.kt

@@ -48,7 +48,7 @@ class ImportMessagesDialog(
                         config.importSms = view.import_sms_checkbox.isChecked
                         config.importMms = view.import_mms_checkbox.isChecked
                         ensureBackgroundThread {
-                            MessagesImporter(activity).importMessages(messages) {
+                            MessagesImporter(activity).restoreMessages(messages) {
                                 handleParseResult(it)
                                 alertDialog.dismiss()
                             }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/MessagesImporter.kt

@@ -1,20 +1,68 @@
 package com.simplemobiletools.smsmessenger.helpers
 
-import android.content.Context
+import android.net.Uri
+import android.util.Xml
 import com.simplemobiletools.commons.extensions.showErrorToast
+import com.simplemobiletools.commons.extensions.toast
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.activities.SimpleActivity
+import com.simplemobiletools.smsmessenger.dialogs.ImportMessagesDialog
 import com.simplemobiletools.smsmessenger.extensions.config
 import com.simplemobiletools.smsmessenger.models.*
+import kotlinx.serialization.SerializationException
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.json.Json
+import org.xmlpull.v1.XmlPullParser
+import java.io.InputStream
 
 
-class MessagesImporter(private val context: Context) {
+class MessagesImporter(private val activity: SimpleActivity) {
 
-    private val messageWriter = MessagesWriter(context)
-    private val config = context.config
+    private val messageWriter = MessagesWriter(activity)
+    private val config = activity.config
     private var messagesImported = 0
     private var messagesFailed = 0
 
-    fun importMessages(messagesBackup: List<MessagesBackup>, callback: (result: ImportResult) -> Unit) {
+    fun importMessages(uri: Uri) {
+        try {
+            val fileType = activity.contentResolver.getType(uri).orEmpty()
+
+            val isXml = isXmlMimeType(fileType) || (uri.path?.endsWith("txt") == true && isFileXml(uri))
+
+            if (isXml) {
+                getInputStreamFromUri(uri)!!.importXml()
+            } else {
+                importJson(uri)
+            }
+
+        } catch (e: Exception) {
+            activity.showErrorToast(e)
+        }
+    }
+
+    private fun importJson(uri: Uri) {
+        try {
+            val jsonString = activity.contentResolver.openInputStream(uri)!!.use { inputStream ->
+                inputStream.bufferedReader().readText()
+            }
+
+            val deserializedList = Json.decodeFromString<List<MessagesBackup>>(jsonString)
+            if (deserializedList.isEmpty()) {
+                activity.toast(R.string.no_entries_for_importing)
+                return
+            }
+            ImportMessagesDialog(activity, deserializedList)
+        } catch (e: SerializationException) {
+            activity.toast(R.string.invalid_file_format)
+        } catch (e: IllegalArgumentException) {
+            activity.toast(R.string.invalid_file_format)
+        } catch (e: Exception) {
+            activity.showErrorToast(e)
+        }
+    }
+
+    fun restoreMessages(messagesBackup: List<MessagesBackup>, callback: (ImportResult) -> Unit) {
         ensureBackgroundThread {
             try {
                 messagesBackup.forEach { message ->
@@ -23,17 +71,16 @@ class MessagesImporter(private val context: Context) {
                             messageWriter.writeSmsMessage(message as SmsBackup)
                         } else if (message.backupType == BackupType.MMS && config.importMms) {
                             messageWriter.writeMmsMessage(message as MmsBackup)
-                        }
-                        else return@forEach
+                        } else return@forEach
                         messagesImported++
                     } catch (e: Exception) {
-                        context.showErrorToast(e)
+                        activity.showErrorToast(e)
                         messagesFailed++
                     }
                 }
                 refreshMessages()
             } catch (e: Exception) {
-                context.showErrorToast(e)
+                activity.showErrorToast(e)
             }
 
             callback.invoke(
@@ -46,4 +93,96 @@ class MessagesImporter(private val context: Context) {
             )
         }
     }
+
+    private fun InputStream.importXml() {
+        bufferedReader().use { reader ->
+            val xmlParser = Xml.newPullParser().apply {
+                setInput(reader)
+            }
+
+            xmlParser.nextTag()
+            xmlParser.require(XmlPullParser.START_TAG, null, "smses")
+
+            var depth = 1
+            while (depth != 0) {
+                when (xmlParser.next()) {
+                    XmlPullParser.END_TAG -> depth--
+                    XmlPullParser.START_TAG -> depth++
+                }
+
+                if (xmlParser.eventType != XmlPullParser.START_TAG) {
+                    continue
+                }
+
+                try {
+                    if (xmlParser.name == "sms") {
+                        if (config.importSms) {
+                            val message = xmlParser.readSms()
+                            messageWriter.writeSmsMessage(message)
+                            messagesImported++
+                        } else {
+                            xmlParser.skip()
+                        }
+                    } else {
+                        xmlParser.skip()
+                    }
+                } catch (e: Exception) {
+                    activity.showErrorToast(e)
+                    messagesFailed++
+                }
+            }
+            refreshMessages()
+        }
+        // TODO: Add result to xml import
+    }
+
+    private fun XmlPullParser.readSms(): SmsBackup {
+        require(XmlPullParser.START_TAG, null, "sms")
+
+        return SmsBackup(
+            subscriptionId = 0,
+            address = getAttributeValue(null, "address"),
+            body = getAttributeValue(null, "body"),
+            date = getAttributeValue(null, "date").toLong(),
+            dateSent = getAttributeValue(null, "date").toLong(),
+            locked = getAttributeValue(null, "locked").toInt(),
+            protocol = getAttributeValue(null, "protocol"),
+            read = getAttributeValue(null, "read").toInt(),
+            status = getAttributeValue(null, "status").toInt(),
+            type = getAttributeValue(null, "type").toInt(),
+            serviceCenter = getAttributeValue(null, "service_center")
+        )
+    }
+
+    private fun XmlPullParser.skip() {
+        if (eventType != XmlPullParser.START_TAG) {
+            throw IllegalStateException()
+        }
+        var depth = 1
+        while (depth != 0) {
+            when (next()) {
+                XmlPullParser.END_TAG -> depth--
+                XmlPullParser.START_TAG -> depth++
+            }
+        }
+    }
+
+    private fun getInputStreamFromUri(uri: Uri): InputStream? {
+        return try {
+            activity.contentResolver.openInputStream(uri)
+        } catch (e: Exception) {
+            null
+        }
+    }
+
+    private fun isFileXml(uri: Uri): Boolean {
+        val inputStream = getInputStreamFromUri(uri)
+        return inputStream?.bufferedReader()?.use { reader ->
+            reader.readLine()?.startsWith("<?xml") ?: false
+        } ?: false
+    }
+
+    private fun isXmlMimeType(mimeType: String): Boolean {
+        return mimeType.equals("application/xml", ignoreCase = true)
+    }
 }