private RewriteResult EnableAndResetForQuery(MySqlQueryWriter writer, ITerminalNode node)
{
_isEnabledForQuery = true;
_whereClauseOpened = false;
_whereClauseClosed = false;
_whereClauseHasHangingBracket = false;
return(RewriteResult.NoChanges);
}
private RewriteResult RewriteBacktickQuotedIdentifier(MySqlQueryWriter writer, ITerminalNode node)
{
if (string.Equals(node.GetText(), _backtickQuotedIdentifier, System.StringComparison.OrdinalIgnoreCase))
{
writer.WriteSymbol(_backtickQuotedReplacement);
return(RewriteResult.ReplacedSymbol);
}
return(RewriteResult.NoChanges);
}
private RewriteResult WhereClauseBegin(MySqlQueryWriter writer, ITerminalNode node)
{
if (!_isEnabledForQuery)
{
return(RewriteResult.NoChanges);
}
OpenWhereClause(writer, isWhereClauseToken: true);
return(RewriteResult.ReplacedSymbol);
}
private RewriteResult WhereClauseTerminator(MySqlQueryWriter writer, ITerminalNode node)
{
if (!_isEnabledForQuery)
{
return(RewriteResult.NoChanges);
}
OpenWhereClause(writer, isWhereClauseToken: false);
CloseWhereClause(writer);
return(RewriteResult.NoChanges);
}
private void CloseWhereClause(MySqlQueryWriter writer)
{
if (!_whereClauseOpened || _whereClauseClosed)
{
return;
}
_whereClauseClosed = true;
if (_whereClauseHasHangingBracket)
{
writer.WriteSymbol(")");
}
}
private void OpenWhereClause(MySqlQueryWriter writer, bool isWhereClauseToken)
{
if (_whereClauseOpened)
{
return;
}
_whereClauseOpened = true;
_whereClauseHasHangingBracket = isWhereClauseToken;
if (isWhereClauseToken)
{
writer.WriteSymbol($"WHERE {Condition} AND (");
}
else
{
writer.WriteSymbol($"WHERE {Condition} ");
}
}
private RewriteResult Disable(MySqlQueryWriter writer, ITerminalNode node)
{
_isEnabledForQuery = false;
return(RewriteResult.NoChanges);
}
public MySqlQueryVisitor(MySqlQueryWriter writer)
{
_writer = writer ?? throw new ArgumentNullException(nameof(writer));
}
