/**
 @module ember
*/
/**
  A Glimmer2 AST transformation that replaces all instances of

  ```handlebars
 <button {{action 'foo'}}>
 <button onblur={{action 'foo'}}>
 <button onblur={{action (action 'foo') 'bar'}}>
  ```

  with

  ```handlebars
 <button {{action this 'foo'}}>
 <button onblur={{action this 'foo'}}>
 <button onblur={{action this (action this 'foo') 'bar'}}>
  ```

  @private
  @class TransformActionSyntax
*/
export default function transformActionSyntax({ syntax }) {
    let { builders: b } = syntax;
    return {
        name: 'transform-action-syntax',
        visitor: {
            ElementModifierStatement(node) {
                if (isAction(node)) {
                    insertThisAsFirstParam(node, b);
                }
            },
            MustacheStatement(node) {
                if (isAction(node)) {
                    insertThisAsFirstParam(node, b);
                }
            },
            SubExpression(node) {
                if (isAction(node)) {
                    insertThisAsFirstParam(node, b);
                }
            },
        },
    };
}
function isAction(node) {
    return node.path.original === 'action';
}
function insertThisAsFirstParam(node, builders) {
    node.params.unshift(builders.path('this'));
}