function handleVersionAttribute()

in packages/dynamodb-data-mapper/src/DataMapper.ts [1241:1269]

• 28 lines of code
• 2 McCabe index (conditional complexity)

function handleVersionAttribute(
    attributeName: string,
    inputMember: any,
): {condition: ConditionExpression, value: MathematicalExpression|AttributeValue} {
    let condition: ConditionExpression;
    let value: any;
    if (inputMember === undefined) {
        condition = new FunctionExpression(
            'attribute_not_exists',
            new AttributePath([
                {type: 'AttributeName', name: attributeName} as PathElement
            ])
        );
        value = new AttributeValue({N: "0"});
    } else {
        condition = {
            type: 'Equals',
            subject: attributeName,
            object: inputMember,
        };
        value = new MathematicalExpression(
            new AttributePath(attributeName),
            '+',
            1
        );
    }

    return {condition, value};
}