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