"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.hasOwnDecorators = hasOwnDecorators;
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exports.hasDecorators = hasDecorators;
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exports.buildDecoratedClass = buildDecoratedClass;
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var _core = require("@babel/core");
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var _helperReplaceSupers = require("@babel/helper-replace-supers");
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var _helperFunctionName = require("@babel/helper-function-name");
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function hasOwnDecorators(node) {
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return !!(node.decorators && node.decorators.length);
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}
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function hasDecorators(node) {
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return hasOwnDecorators(node) || node.body.body.some(hasOwnDecorators);
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}
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function prop(key, value) {
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if (!value) return null;
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return _core.types.objectProperty(_core.types.identifier(key), value);
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}
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function method(key, body) {
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return _core.types.objectMethod("method", _core.types.identifier(key), [], _core.types.blockStatement(body));
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}
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function takeDecorators(node) {
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let result;
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if (node.decorators && node.decorators.length > 0) {
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result = _core.types.arrayExpression(node.decorators.map(decorator => decorator.expression));
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}
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node.decorators = undefined;
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return result;
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}
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function getKey(node) {
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if (node.computed) {
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return node.key;
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} else if (_core.types.isIdentifier(node.key)) {
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return _core.types.stringLiteral(node.key.name);
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} else {
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return _core.types.stringLiteral(String(node.key.value));
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}
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}
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function extractElementDescriptor(classRef, superRef, path) {
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const {
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node,
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scope
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} = path;
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const isMethod = path.isClassMethod();
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if (path.isPrivate()) {
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throw path.buildCodeFrameError(`Private ${isMethod ? "methods" : "fields"} in decorated classes are not supported yet.`);
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}
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new _helperReplaceSupers.default({
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methodPath: path,
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objectRef: classRef,
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superRef,
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file: this,
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refToPreserve: classRef
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}).replace();
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const properties = [prop("kind", _core.types.stringLiteral(_core.types.isClassMethod(node) ? node.kind : "field")), prop("decorators", takeDecorators(node)), prop("static", node.static && _core.types.booleanLiteral(true)), prop("key", getKey(node))].filter(Boolean);
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if (_core.types.isClassMethod(node)) {
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const id = node.computed ? null : node.key;
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_core.types.toExpression(node);
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properties.push(prop("value", (0, _helperFunctionName.default)({
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node,
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id,
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scope
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}) || node));
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} else if (_core.types.isClassProperty(node) && node.value) {
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properties.push(method("value", _core.template.statements.ast`return ${node.value}`));
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} else {
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properties.push(prop("value", scope.buildUndefinedNode()));
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}
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path.remove();
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return _core.types.objectExpression(properties);
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}
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function addDecorateHelper(file) {
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try {
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return file.addHelper("decorate");
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} catch (err) {
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if (err.code === "BABEL_HELPER_UNKNOWN") {
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err.message += "\n '@babel/plugin-transform-decorators' in non-legacy mode" + " requires '@babel/core' version ^7.0.2 and you appear to be using" + " an older version.";
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}
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throw err;
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}
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}
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function buildDecoratedClass(ref, path, elements, file) {
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const {
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node,
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scope
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} = path;
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const initializeId = scope.generateUidIdentifier("initialize");
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const isDeclaration = node.id && path.isDeclaration();
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const isStrict = path.isInStrictMode();
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const {
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superClass
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} = node;
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node.type = "ClassDeclaration";
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if (!node.id) node.id = _core.types.cloneNode(ref);
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let superId;
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if (superClass) {
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superId = scope.generateUidIdentifierBasedOnNode(node.superClass, "super");
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node.superClass = superId;
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}
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const classDecorators = takeDecorators(node);
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const definitions = _core.types.arrayExpression(elements.filter(element => !element.node.abstract).map(extractElementDescriptor.bind(file, node.id, superId)));
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const wrapperCall = _core.template.expression.ast`
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${addDecorateHelper(file)}(
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${classDecorators || _core.types.nullLiteral()},
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function (${initializeId}, ${superClass ? _core.types.cloneNode(superId) : null}) {
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${node}
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return { F: ${_core.types.cloneNode(node.id)}, d: ${definitions} };
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},
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${superClass}
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)
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`;
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if (!isStrict) {
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wrapperCall.arguments[1].body.directives.push(_core.types.directive(_core.types.directiveLiteral("use strict")));
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}
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let replacement = wrapperCall;
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let classPathDesc = "arguments.1.body.body.0";
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if (isDeclaration) {
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replacement = _core.template.statement.ast`let ${ref} = ${wrapperCall}`;
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classPathDesc = "declarations.0.init." + classPathDesc;
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}
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return {
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instanceNodes: [_core.template.statement.ast`${_core.types.cloneNode(initializeId)}(this)`],
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wrapClass(path) {
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path.replaceWith(replacement);
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return path.get(classPathDesc);
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}
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};
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}
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