Function getDecoratorTargets

scripts/transpile.ts:126–166

The name of the decorated class if it's a block on the form ... ... = __decorate([registerGObjectClass, ...], NameOfDecoratedClass); ...

(node: BaseNode)

...
*/
function getDecoratorTargets(node: BaseNode): string[] | null {
    if (isBlockStatement(node) || isProgram(node)) {
        let targets = [];
        for (let child of node.body) {
            if (!isExpressionStatement(child)) continue;
            if (!isAssignmentExpression(child.expression)) continue;
            let rhs = child.expression.right;

            // Essentially go from expressions on the form `a = b = c = d` to `a = d`
            while (isAssignmentExpression(rhs)) rhs = rhs.right;

            if (!isSimpleCallExpression(rhs)) continue;
            if (!isIdentifier(rhs.callee)) continue;

            if (rhs.callee.name != '__decorate') continue;

            let args = rhs.arguments;
            if (args.length != 2) continue;

            let decoratorFunctions = args[0];
            if (!isArrayExpression(decoratorFunctions)) continue;

            const gObjectDecorator = decoratorFunctions.elements.find(
                (item) => {
                    return (
                        isIdentifier(item) &&
                        item.name == 'registerGObjectClass'
                    );
                }
            );
            if (gObjectDecorator === undefined) continue;

            let targetClass = args[1];
            if (!isIdentifier(targetClass)) continue;

            targets.push(targetClass.name);
        }
        return targets;
    }
    return null;
}

/// Converts imports on the form
/// import * from 'source'