feat(db): add file hash to file history

Not currently used, but there are plans to display if a transfered file
has been modified, which the file hash will be needed for. Adding file
hash at the same time as file history also saves a db schema update.

src/core/corefile.cpp

@@ -438,6 +438,7 @@ void CoreFile::onFileDataCallback(Tox* tox, uint32_t friendId, uint32_t fileId,
             return;
         }
         file->bytesSent += length;
+        file->hashGenerator->addData((const char*)data.get(), length);
     }
 
     if (!tox_file_send_chunk(tox, friendId, fileId, pos, data.get(), nread, nullptr)) {
@@ -492,6 +493,7 @@ void CoreFile::onFileRecvChunkCallback(Tox* tox, uint32_t friendId, uint32_t fil
     else
         file->file->write((char*)data, length);
     file->bytesSent += length;
+    file->hashGenerator->addData((const char*)data, length);
 
     if (file->fileKind != TOX_FILE_KIND_AVATAR)
         emit static_cast<Core*>(core)->fileTransferInfo(*file);

src/core/toxfile.h

@@ -3,6 +3,7 @@
 
 #include <QString>
 #include <memory>
+#include <QCryptographicHash>
 
 class QFile;
 class QTimer;
@@ -51,6 +52,7 @@ struct ToxFile
     FileDirection direction;
     QByteArray avatarData;
     QByteArray resumeFileId;
+    std::shared_ptr<QCryptographicHash> hashGenerator = std::make_shared<QCryptographicHash>(QCryptographicHash::Sha256);
 };
 
 #endif // CORESTRUCTS_H

src/persistence/history.cpp

@@ -90,6 +90,7 @@ History::History(std::shared_ptr<RawDatabase> db)
         "file_restart_id BLOB NOT NULL,"
         "file_name BLOB NOT NULL, "
         "file_path BLOB NOT NULL,"
+        "file_hash BLOB NOT NULL,"
         "file_size INTEGER NOT NULL,"
         "direction INTEGER NOT NULL,"
         "file_state INTEGER NOT NULL);"
@@ -279,13 +280,13 @@ void History::onFileInsertionReady(FileDbInsertionData data)
     auto fileId = data.fileId;
     queries +=
         RawDatabase::Query(QStringLiteral("INSERT INTO file_transfers (chat_id, file_restart_id, "
-                                          "file_path, file_name, file_size, direction, file_state) "
+                                          "file_path, file_name, file_hash, file_size, direction, file_state) "
-                                          "VALUES (%1, ?, ?, ?, %2, %3, %4);")
+                                          "VALUES (%1, ?, ?, ?, ?, %2, %3, %4);")
                                .arg(peerId)
                                .arg(data.size)
                                .arg(static_cast<int>(data.direction))
                                .arg(ToxFile::CANCELED),
-                           {data.fileId.toUtf8(), data.filePath.toUtf8(), data.fileName},
+                           {data.fileId.toUtf8(), data.filePath.toUtf8(), data.fileName, QByteArray()},
                            [weakThis, fileId](int64_t id) {
                                auto pThis = weakThis.lock();
                                if (pThis) {
@@ -306,7 +307,7 @@ void History::onFileInserted(int64_t dbId, QString fileId)
 {
     auto& fileInfo = fileInfos[fileId];
     if (fileInfo.finished) {
-        db->execLater(generateFileFinished(dbId, fileInfo.success, fileInfo.filePath));
+        db->execLater(generateFileFinished(dbId, fileInfo.success, fileInfo.filePath, fileInfo.fileHash));
         fileInfos.remove(fileId);
     } else {
         fileInfo.finished = false;
@@ -314,16 +315,16 @@ void History::onFileInserted(int64_t dbId, QString fileId)
     }
 }
 
-RawDatabase::Query History::generateFileFinished(int64_t id, bool success, const QString& filePath)
+RawDatabase::Query History::generateFileFinished(int64_t id, bool success, const QString& filePath, const QByteArray& fileHash)
 {
     auto file_state = success ? ToxFile::FINISHED : ToxFile::CANCELED;
     if (filePath.length()) {
         return RawDatabase::Query(QStringLiteral("UPDATE file_transfers "
-                                                 "SET file_state = %1, file_path = ? "
+                                                 "SET file_state = %1, file_path = ?, file_hash = ?"
                                                  "WHERE id = %2")
                                       .arg(file_state)
                                       .arg(id),
-                                  {filePath.toUtf8()});
+                                  {filePath.toUtf8(), fileHash});
     } else {
         return RawDatabase::Query(QStringLiteral("UPDATE file_transfers "
                                                  "SET finished = %1 "
@@ -405,15 +406,16 @@ void History::addNewMessage(const QString& friendPk, const QString& message, con
                                             insertIdCallback));
 }
 
-void History::setFileFinished(const QString& fileId, bool success, const QString& filePath)
+void History::setFileFinished(const QString& fileId, bool success, const QString& filePath, const QByteArray& fileHash)
 {
     auto& fileInfo = fileInfos[fileId];
     if (fileInfo.fileId == -1) {
         fileInfo.finished = true;
         fileInfo.success = success;
         fileInfo.filePath = filePath;
+        fileInfo.fileHash = fileHash;
     } else {
-        db->execLater(generateFileFinished(fileInfo.fileId, success, filePath));
+        db->execLater(generateFileFinished(fileInfo.fileId, success, filePath, fileHash));
     }
 
     fileInfos.remove(fileId);

src/persistence/history.h

@@ -167,7 +167,7 @@ public:
                            const QByteArray& fileName, const QString& filePath, int64_t size,
                            const QString& sender, const QDateTime& time, QString const& dispName);
 
-    void setFileFinished(const QString& fileId, bool success, const QString& filePath);
+    void setFileFinished(const QString& fileId, bool success, const QString& filePath, const QByteArray& fileHash);
 
     QList<HistMessage> getChatHistoryFromDate(const QString& friendPk, const QDateTime& from,
                                               const QDateTime& to);
@@ -198,7 +198,7 @@ private:
                                       const QDateTime& to, int numMessages);
 
     static RawDatabase::Query generateFileFinished(int64_t fileId, bool success,
-                                                   const QString& filePath);
+                                                   const QString& filePath, const QByteArray& fileHash);
     void dbSchemaUpgrade();
 
     std::shared_ptr<RawDatabase> db;
@@ -210,6 +210,7 @@ private:
         bool finished = false;
         bool success = false;
         QString filePath;
+        QByteArray fileHash;
         int64_t fileId = -1;
     };
 

src/widget/form/chatform.cpp

@@ -329,19 +329,19 @@ void ChatForm::startFileSend(ToxFile file)
 
 void ChatForm::onFileTransferFinished(ToxFile file)
 {
-    history->setFileFinished(file.resumeFileId, true, file.filePath);
+    history->setFileFinished(file.resumeFileId, true, file.filePath, file.hashGenerator->result());
 }
 
 void ChatForm::onFileTransferBrokenUnbroken(ToxFile file, bool broken)
 {
     if (broken) {
-        history->setFileFinished(file.resumeFileId, false, file.filePath);
+        history->setFileFinished(file.resumeFileId, false, file.filePath, file.hashGenerator->result());
     }
 }
 
 void ChatForm::onFileTransferCancelled(ToxFile file)
 {
-    history->setFileFinished(file.resumeFileId, false, file.filePath);
+    history->setFileFinished(file.resumeFileId, false, file.filePath, file.hashGenerator->result());
 }
 
 void ChatForm::onFileRecvRequest(ToxFile file)