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dbhub: Redownload database if local copy has been deleted

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See issue #1111.
This commit is contained in:
Martin Kleusberg
2017-09-01 09:57:44 +02:00
parent 0160fb7462
commit 516ff44789
1 changed files with 26 additions and 2 deletions
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28
src/RemoteDatabase.cpp
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@@ -616,8 +616,32 @@ QString RemoteDatabase::localExists(const QUrl& url, QString identity)
// is newer, or the local commit id is newer.
if(local_commit_id == url_commit_id)
{
// Both commit ids are the same. That's the perfect match, so just return the path to the local file
return Settings::getValue("remote", "clonedirectory").toString() + "/" + local_file;
// Both commit ids are the same. That's the perfect match, so we can build the full path to where the file should be
QString full_path = Settings::getValue("remote", "clonedirectory").toString() + "/" + local_file;
// Check if the database still exists. If so return its path, if not return an empty string to redownload it
if(QFile::exists(full_path))
{
return full_path;
} else {
// Remove the apparently invalid entry from the local clones database to avoid future lookups and confusions. The file column
// should be unique for the entire table because the files are all in the same directory and their names need to be unique because
// of this.
QString sql = QString("DELETE FROM local WHERE file=?");
sqlite3_stmt* stmt;
if(sqlite3_prepare_v2(m_dbLocal, sql.toUtf8(), -1, &stmt, 0) != SQLITE_OK)
return QString();
if(sqlite3_bind_text(stmt, 1, local_file.toUtf8(), local_file.toUtf8().length(), SQLITE_TRANSIENT))
{
sqlite3_finalize(stmt);
return QString();
}
sqlite3_step(stmt);
sqlite3_finalize(stmt);
// Return empty string to indicate a redownload request
return QString();
}
} else {
// In all the other cases just treat the remote database as a completely new database for now.