Fix initial file encryption displaying

fixes #831

libdino/src/service/file_manager.vala

@@ -313,6 +313,15 @@ public class FileManager : StreamInteractionModule, Object {
         file_transfer.size = (int)file_meta.size;
         file_transfer.info = info;
 
+        var encryption = file_provider.get_encryption(file_transfer, receive_data, file_meta);
+        if (encryption != Encryption.NONE) file_transfer.encryption = encryption;
+
+        foreach (FileDecryptor decryptor in file_decryptors) {
+            if (decryptor.can_decrypt_file(conversation, file_transfer, receive_data)) {
+                file_transfer.encryption = decryptor.get_encryption();
+            }
+        }
+
         file_transfer.persist(db);
 
         if (is_sender_trustworthy(file_transfer, conversation)) {
@@ -389,6 +398,7 @@ public class HttpFileReceiveData : FileReceiveData {
 public interface FileProvider : Object {
     public signal void file_incoming(string info, Jid from, DateTime time, DateTime local_time, Conversation conversation, FileReceiveData receive_data, FileMeta file_meta);
 
+    public abstract Encryption get_encryption(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta);
     public abstract FileMeta get_file_meta(FileTransfer file_transfer) throws FileReceiveError;
     public abstract FileReceiveData? get_file_receive_data(FileTransfer file_transfer);
 
@@ -419,6 +429,7 @@ public interface FileEncryptor : Object {
 }
 
 public interface FileDecryptor : Object {
+    public abstract Encryption get_encryption();
     public abstract FileReceiveData prepare_get_meta_info(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data);
     public abstract FileMeta prepare_download_file(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta);
     public abstract bool can_decrypt_file(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data);

libdino/src/service/jingle_file_transfers.vala

@@ -11,7 +11,7 @@ public interface JingleFileEncryptionHelper : Object {
     public abstract async bool can_encrypt(Conversation conversation, FileTransfer file_transfer, Jid? full_jid = null);
     public abstract string? get_precondition_name(Conversation conversation, FileTransfer file_transfer);
     public abstract Object? get_precondition_options(Conversation conversation, FileTransfer file_transfer);
-    public abstract FileMeta complete_meta(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta, Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer);
+    public abstract Encryption get_encryption(Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer);
 }
 
 public class JingleFileEncryptionHelperTransferOnly : JingleFileEncryptionHelper, Object  {
@@ -27,8 +27,8 @@ public class JingleFileEncryptionHelperTransferOnly : JingleFileEncryptionHelper
     public Object? get_precondition_options(Conversation conversation, FileTransfer file_transfer) {
         return null;
     }
-    public FileMeta complete_meta(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta, Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer) {
+    public Encryption get_encryption(Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer) {
-        return file_meta;
+        return Encryption.NONE;
     }
 }
 
@@ -79,15 +79,19 @@ public class JingleFileProvider : FileProvider, Object {
     }
 
     public async FileMeta get_meta_info(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) throws FileReceiveError {
+        return file_meta;
+    }
+
+    public Encryption get_encryption(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) {
         Xmpp.Xep.JingleFileTransfer.FileTransfer? jingle_file_transfer = file_transfers[file_transfer.info];
         if (jingle_file_transfer == null) {
             throw new FileReceiveError.DOWNLOAD_FAILED("Transfer data not available anymore");
         }
-        FileMeta meta = file_meta;
         foreach (JingleFileEncryptionHelper helper in JingleFileHelperRegistry.instance.encryption_helpers.values) {
-            meta = helper.complete_meta(file_transfer, receive_data, meta, jingle_file_transfer);
+            var encryption = helper.get_encryption(jingle_file_transfer);
+            if (encryption != Encryption.NONE) return encryption;
         }
-        return meta;
+        return Encryption.NONE;
     }
 
     public async InputStream download(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) throws FileReceiveError {
@@ -97,9 +101,6 @@ public class JingleFileProvider : FileProvider, Object {
         if (jingle_file_transfer == null) {
             throw new FileReceiveError.DOWNLOAD_FAILED("Transfer data not available anymore");
         }
-        foreach (JingleFileEncryptionHelper helper in JingleFileHelperRegistry.instance.encryption_helpers.values) {
-            helper.complete_meta(file_transfer, receive_data, file_meta, jingle_file_transfer);
-        }
         try {
             jingle_file_transfer.accept(stream);
         } catch (IOError e) {

plugins/http-files/src/file_provider.vala

@@ -92,6 +92,10 @@ public class FileProvider : Dino.FileProvider, Object {
         return file_meta;
     }
 
+    public Encryption get_encryption(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) {
+        return Encryption.NONE;
+    }
+
     public async InputStream download(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) throws FileReceiveError {
         HttpFileReceiveData? http_receive_data = receive_data as HttpFileReceiveData;
         if (http_receive_data == null) assert(false);

plugins/omemo/src/file_transfer/file_decryptor.vala

@@ -13,6 +13,10 @@ public class OmemoFileDecryptor : FileDecryptor, Object {
 
     private Regex url_regex = /^aesgcm:\/\/(.*)#(([A-Fa-f0-9]{2}){48}|([A-Fa-f0-9]{2}){44})$/;
 
+    public Encryption get_encryption() {
+        return Encryption.OMEMO;
+    }
+
     public FileReceiveData prepare_get_meta_info(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data) {
         HttpFileReceiveData? http_receive_data = receive_data as HttpFileReceiveData;
         if (http_receive_data == null) assert(false);

plugins/omemo/src/jingle/jingle_helper.vala

@@ -42,12 +42,12 @@ public class EncryptionHelper : JingleFileEncryptionHelper, Object {
         return new Xep.Jet.Options(Omemo.NS_URI, AES_128_GCM_URI);
     }
 
-    public FileMeta complete_meta(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta, Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer) {
+    public Encryption get_encryption(Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer) {
         Xep.Jet.SecurityParameters? security = jingle_transfer.security as Xep.Jet.SecurityParameters;
         if (security != null && security.encoding.get_type_uri() == Omemo.NS_URI) {
-            file_transfer.encryption = Encryption.OMEMO;
+            return Encryption.OMEMO;
         }
-        return file_meta;
+        return Encryption.NONE;
     }
 }
 }

plugins/openpgp/src/file_transfer/file_decryptor.vala

@@ -4,6 +4,10 @@ namespace Dino.Plugins.OpenPgp {
 
 public class PgpFileDecryptor : FileDecryptor, Object {
 
+    public Encryption get_encryption() {
+        return Encryption.PGP;
+    }
+
     public FileReceiveData prepare_get_meta_info(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data) {
         return receive_data;
     }