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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.extractComputedKeys = extractComputedKeys;
exports.injectInitialization = injectInitialization;
exports.memoiseComputedKey = memoiseComputedKey;
var _core = require("@babel/core");
var _traverse = require("@babel/traverse");
const findBareSupers = _traverse.visitors.environmentVisitor({
Super(path) {
const {
node,
parentPath
} = path;
if (parentPath.isCallExpression({
callee: node
})) {
this.push(parentPath);
}
}
});
const referenceVisitor = {
"TSTypeAnnotation|TypeAnnotation"(path) {
path.skip();
},
ReferencedIdentifier(path, {
scope
}) {
if (scope.hasOwnBinding(path.node.name)) {
scope.rename(path.node.name);
path.skip();
}
}
};
function handleClassTDZ(path, state) {
if (state.classBinding && state.classBinding === path.scope.getBinding(path.node.name)) {
const classNameTDZError = state.file.addHelper("classNameTDZError");
const throwNode = _core.types.callExpression(classNameTDZError, [_core.types.stringLiteral(path.node.name)]);
path.replaceWith(_core.types.sequenceExpression([throwNode, path.node]));
path.skip();
}
}
const classFieldDefinitionEvaluationTDZVisitor = {
ReferencedIdentifier: handleClassTDZ,
"TSTypeAnnotation|TypeAnnotation"(path) {
path.skip();
}
};
function injectInitialization(path, constructor, nodes, renamer, lastReturnsThis) {
if (!nodes.length) return;
const isDerived = !!path.node.superClass;
if (!constructor) {
const newConstructor = _core.types.classMethod("constructor", _core.types.identifier("constructor"), [], _core.types.blockStatement([]));
if (isDerived) {
newConstructor.params = [_core.types.restElement(_core.types.identifier("args"))];
newConstructor.body.body.push(_core.template.statement.ast`super(...args)`);
}
[constructor] = path.get("body").unshiftContainer("body", newConstructor);
}
if (renamer) {
renamer(referenceVisitor, {
scope: constructor.scope
});
}
if (isDerived) {
const bareSupers = [];
constructor.traverse(findBareSupers, bareSupers);
let isFirst = true;
for (const bareSuper of bareSupers) {
if (isFirst) {
isFirst = false;
} else {
nodes = nodes.map(n => _core.types.cloneNode(n));
}
if (!bareSuper.parentPath.isExpressionStatement()) {
const allNodes = [bareSuper.node, ...nodes.map(n => _core.types.toExpression(n))];
if (!lastReturnsThis) allNodes.push(_core.types.thisExpression());
bareSuper.replaceWith(_core.types.sequenceExpression(allNodes));
} else {
bareSuper.insertAfter(nodes);
}
}
} else {
constructor.get("body").unshiftContainer("body", nodes);
}
}
function memoiseComputedKey(keyNode, scope, hint) {
const isUidReference = _core.types.isIdentifier(keyNode) && scope.hasUid(keyNode.name);
if (isUidReference) {
return;
}
const isMemoiseAssignment = _core.types.isAssignmentExpression(keyNode, {
operator: "="
}) && _core.types.isIdentifier(keyNode.left) && scope.hasUid(keyNode.left.name);
if (isMemoiseAssignment) {
return _core.types.cloneNode(keyNode);
} else {
const ident = _core.types.identifier(hint);
scope.push({
id: ident,
kind: "let"
});
return _core.types.assignmentExpression("=", _core.types.cloneNode(ident), keyNode);
}
}
function extractComputedKeys(path, computedPaths, file) {
const {
scope
} = path;
const declarations = [];
const state = {
classBinding: path.node.id && scope.getBinding(path.node.id.name),
file
};
for (const computedPath of computedPaths) {
const computedKey = computedPath.get("key");
if (computedKey.isReferencedIdentifier()) {
handleClassTDZ(computedKey, state);
} else {
computedKey.traverse(classFieldDefinitionEvaluationTDZVisitor, state);
}
const computedNode = computedPath.node;
if (!computedKey.isConstantExpression()) {
const assignment = memoiseComputedKey(computedKey.node, scope, scope.generateUidBasedOnNode(computedKey.node));
if (assignment) {
declarations.push(_core.types.expressionStatement(assignment));
computedNode.key = _core.types.cloneNode(assignment.left);
}
}
}
return declarations;
}
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