"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _core = require("@babel/core");
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const buildClassDecorator = _core.template.statement(`
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DECORATOR(CLASS_REF = INNER) || CLASS_REF;
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`);
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const buildClassPrototype = (0, _core.template)(`
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CLASS_REF.prototype;
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`);
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const buildGetDescriptor = (0, _core.template)(`
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Object.getOwnPropertyDescriptor(TARGET, PROPERTY);
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`);
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const buildGetObjectInitializer = (0, _core.template)(`
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(TEMP = Object.getOwnPropertyDescriptor(TARGET, PROPERTY), (TEMP = TEMP ? TEMP.value : undefined), {
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enumerable: true,
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configurable: true,
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writable: true,
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initializer: function(){
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return TEMP;
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}
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})
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`);
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const WARNING_CALLS = new WeakSet();
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function applyEnsureOrdering(path) {
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const decorators = (path.isClass() ? [path, ...path.get("body.body")] : path.get("properties")).reduce((acc, prop) => acc.concat(prop.node.decorators || []), []);
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const identDecorators = decorators.filter(decorator => !_core.types.isIdentifier(decorator.expression));
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if (identDecorators.length === 0) return;
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return _core.types.sequenceExpression(identDecorators.map(decorator => {
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const expression = decorator.expression;
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const id = decorator.expression = path.scope.generateDeclaredUidIdentifier("dec");
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return _core.types.assignmentExpression("=", id, expression);
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}).concat([path.node]));
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}
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function applyClassDecorators(classPath) {
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if (!hasClassDecorators(classPath.node)) return;
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const decorators = classPath.node.decorators || [];
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classPath.node.decorators = null;
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const name = classPath.scope.generateDeclaredUidIdentifier("class");
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return decorators.map(dec => dec.expression).reverse().reduce(function (acc, decorator) {
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return buildClassDecorator({
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CLASS_REF: _core.types.cloneNode(name),
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DECORATOR: _core.types.cloneNode(decorator),
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INNER: acc
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}).expression;
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}, classPath.node);
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}
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function hasClassDecorators(classNode) {
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return !!(classNode.decorators && classNode.decorators.length);
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}
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function applyMethodDecorators(path, state) {
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if (!hasMethodDecorators(path.node.body.body)) return;
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return applyTargetDecorators(path, state, path.node.body.body);
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}
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function hasMethodDecorators(body) {
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return body.some(node => {
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var _node$decorators;
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return (_node$decorators = node.decorators) == null ? void 0 : _node$decorators.length;
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});
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}
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function applyObjectDecorators(path, state) {
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if (!hasMethodDecorators(path.node.properties)) return;
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return applyTargetDecorators(path, state, path.node.properties.filter(prop => prop.type !== "SpreadElement"));
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}
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function applyTargetDecorators(path, state, decoratedProps) {
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const name = path.scope.generateDeclaredUidIdentifier(path.isClass() ? "class" : "obj");
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const exprs = decoratedProps.reduce(function (acc, node) {
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let decorators = [];
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if (node.decorators != null) {
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decorators = node.decorators;
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node.decorators = null;
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}
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if (decorators.length === 0) return acc;
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if (node.computed) {
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throw path.buildCodeFrameError("Computed method/property decorators are not yet supported.");
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}
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const property = _core.types.isLiteral(node.key) ? node.key : _core.types.stringLiteral(node.key.name);
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const target = path.isClass() && !node.static ? buildClassPrototype({
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CLASS_REF: name
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}).expression : name;
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if (_core.types.isClassProperty(node, {
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static: false
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})) {
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const descriptor = path.scope.generateDeclaredUidIdentifier("descriptor");
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const initializer = node.value ? _core.types.functionExpression(null, [], _core.types.blockStatement([_core.types.returnStatement(node.value)])) : _core.types.nullLiteral();
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node.value = _core.types.callExpression(state.addHelper("initializerWarningHelper"), [descriptor, _core.types.thisExpression()]);
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WARNING_CALLS.add(node.value);
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acc.push(_core.types.assignmentExpression("=", _core.types.cloneNode(descriptor), _core.types.callExpression(state.addHelper("applyDecoratedDescriptor"), [_core.types.cloneNode(target), _core.types.cloneNode(property), _core.types.arrayExpression(decorators.map(dec => _core.types.cloneNode(dec.expression))), _core.types.objectExpression([_core.types.objectProperty(_core.types.identifier("configurable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("enumerable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("writable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("initializer"), initializer)])])));
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} else {
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acc.push(_core.types.callExpression(state.addHelper("applyDecoratedDescriptor"), [_core.types.cloneNode(target), _core.types.cloneNode(property), _core.types.arrayExpression(decorators.map(dec => _core.types.cloneNode(dec.expression))), _core.types.isObjectProperty(node) || _core.types.isClassProperty(node, {
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static: true
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}) ? buildGetObjectInitializer({
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TEMP: path.scope.generateDeclaredUidIdentifier("init"),
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TARGET: _core.types.cloneNode(target),
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PROPERTY: _core.types.cloneNode(property)
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}).expression : buildGetDescriptor({
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TARGET: _core.types.cloneNode(target),
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PROPERTY: _core.types.cloneNode(property)
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}).expression, _core.types.cloneNode(target)]));
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}
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return acc;
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}, []);
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return _core.types.sequenceExpression([_core.types.assignmentExpression("=", _core.types.cloneNode(name), path.node), _core.types.sequenceExpression(exprs), _core.types.cloneNode(name)]);
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}
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function decoratedClassToExpression({
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node,
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scope
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}) {
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if (!hasClassDecorators(node) && !hasMethodDecorators(node.body.body)) {
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return;
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}
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const ref = node.id ? _core.types.cloneNode(node.id) : scope.generateUidIdentifier("class");
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return _core.types.variableDeclaration("let", [_core.types.variableDeclarator(ref, _core.types.toExpression(node))]);
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}
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const visitor = {
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ExportDefaultDeclaration(path) {
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const decl = path.get("declaration");
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if (!decl.isClassDeclaration()) return;
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const replacement = decoratedClassToExpression(decl);
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if (replacement) {
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const [varDeclPath] = path.replaceWithMultiple([replacement, _core.types.exportNamedDeclaration(null, [_core.types.exportSpecifier(_core.types.cloneNode(replacement.declarations[0].id), _core.types.identifier("default"))])]);
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if (!decl.node.id) {
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path.scope.registerDeclaration(varDeclPath);
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}
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}
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},
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ClassDeclaration(path) {
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const replacement = decoratedClassToExpression(path);
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if (replacement) {
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const [newPath] = path.replaceWith(replacement);
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const decl = newPath.get("declarations.0");
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const id = decl.node.id;
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const binding = path.scope.getOwnBinding(id.name);
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binding.identifier = id;
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binding.path = decl;
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}
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},
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ClassExpression(path, state) {
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const decoratedClass = applyEnsureOrdering(path) || applyClassDecorators(path) || applyMethodDecorators(path, state);
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if (decoratedClass) path.replaceWith(decoratedClass);
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},
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ObjectExpression(path, state) {
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const decoratedObject = applyEnsureOrdering(path) || applyObjectDecorators(path, state);
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if (decoratedObject) path.replaceWith(decoratedObject);
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},
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AssignmentExpression(path, state) {
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if (!WARNING_CALLS.has(path.node.right)) return;
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path.replaceWith(_core.types.callExpression(state.addHelper("initializerDefineProperty"), [_core.types.cloneNode(path.get("left.object").node), _core.types.stringLiteral(path.get("left.property").node.name || path.get("left.property").node.value), _core.types.cloneNode(path.get("right.arguments")[0].node), _core.types.cloneNode(path.get("right.arguments")[1].node)]));
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},
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CallExpression(path, state) {
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if (path.node.arguments.length !== 3) return;
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if (!WARNING_CALLS.has(path.node.arguments[2])) return;
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if (path.node.callee.name !== state.addHelper("defineProperty").name) {
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return;
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}
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path.replaceWith(_core.types.callExpression(state.addHelper("initializerDefineProperty"), [_core.types.cloneNode(path.get("arguments")[0].node), _core.types.cloneNode(path.get("arguments")[1].node), _core.types.cloneNode(path.get("arguments.2.arguments")[0].node), _core.types.cloneNode(path.get("arguments.2.arguments")[1].node)]));
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}
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};
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var _default = visitor;
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exports.default = _default;
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//# sourceMappingURL=transformer-legacy.js.map
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