metadata.ts

// Create TypeScript property with given name and value, primitive literal values only.
const createPrimitiveProperty = (name: string, value: any) => ts.createPropertyAssignment(name, ts.createLiteral(defined(value)));

// Turn metadata object into TypeScript ObjectLiteralExpression.
const createMetadataObjectLiteral = (metadata: Metadata): ts.ObjectLiteralExpression => {
    return ts.createObjectLiteral([
        createPrimitiveProperty('uuid', metadata.uuid),
        createPrimitiveProperty('part', metadata.part),
        createPrimitiveProperty('observable', metadata.observable),
        createPrimitiveProperty('identifier', metadata.identifier),
        createPrimitiveProperty('pipe', metadata.pipe),
        createPrimitiveProperty('fn', metadata.fn),
        createPrimitiveProperty('file', metadata.file),
        createPrimitiveProperty('line', metadata.line),
        createPrimitiveProperty('pos', metadata.pos)
    ]);
};