/// <summary>
/// Add two number values. If any side are string, concat left+right as string
/// </summary>
public static BsonValue ADD(BsonValue left, BsonValue right)
{
// if both sides are string, concat
if (left.IsString && right.IsString)
{
return(left.AsString + right.AsString);
}
// if any sides are string, concat casting both to string
else if (left.IsString || right.IsString)
{
return(BsonExpressionMethods.STRING(left).AsString + BsonExpressionMethods.STRING(right).AsString);
}
// if any side are DateTime and another is number, add days in date
else if (left.IsDateTime && right.IsNumber)
{
return(left.AsDateTime.AddDays(right.AsDouble));
}
else if (left.IsNumber && right.IsDateTime)
{
return(right.AsDateTime.AddDays(left.AsDouble));
}
// if both sides are number, add as math
else if (left.IsNumber && right.IsNumber)
{
return(left + right);
}
return(BsonValue.Null);
}
/// <summary>
/// Create multi documents based on key-value pairs on parameters. DOCUMENT('_id', 1)
/// </summary>
public static BsonValue DOCUMENT_INIT(string[] keys, BsonValue[] values)
{
ENSURE(keys.Length == values.Length, "both keys/value must contains same length");
// test for special JsonEx data types (date, numberLong, ...)
if (keys.Length == 1 && keys[0][0] == '$' && values[0].IsString)
{
switch (keys[0])
{
case "$binary": return(BsonExpressionMethods.BINARY(values[0]));
case "$oid": return(BsonExpressionMethods.OBJECTID(values[0]));
case "$guid": return(BsonExpressionMethods.GUID(values[0]));
case "$date": return(BsonExpressionMethods.DATE(Collation.Binary, values[0]));
case "$numberLong": return(BsonExpressionMethods.LONG(values[0]));
case "$numberDecimal": return(BsonExpressionMethods.DECIMAL(Collation.Binary, values[0]));
case "$minValue": return(BsonExpressionMethods.MINVALUE());
case "$maxValue": return(BsonExpressionMethods.MAXVALUE());
}
}
var doc = new BsonDocument();
for (var i = 0; i < keys.Length; i++)
{
doc[keys[i]] = values[i];
}
return(doc);
}
