@babel/helper-define-map/lib/index.js

Helper function to define a map

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.hasComputed = hasComputed;
exports.push = push;
exports.toClassObject = toClassObject;
exports.toComputedObjectFromClass = toComputedObjectFromClass;
exports.toDefineObject = toDefineObject;

var _helperFunctionName = require("@babel/helper-function-name");

var _t = require("@babel/types");

const {
  arrayExpression,
  booleanLiteral,
  functionExpression,
  identifier,
  inheritsComments,
  isClassMethod,
  isFunctionExpression,
  isObjectMethod,
  isObjectProperty,
  isProperty,
  isStringLiteral,
  objectExpression,
  objectProperty,
  removeComments,
  toComputedKey,
  toKeyAlias
} = _t;

function toKind(node) {
  if (isClassMethod(node) || isObjectMethod(node)) {
    if (node.kind === "get" || node.kind === "set") {
      return node.kind;
    }
  }

  return "value";
}

const has = Function.prototype.call.bind(Object.prototype.hasOwnProperty);

function push(mutatorMap, node, kind, file, scope) {
  const alias = toKeyAlias(node);
  let map = {};
  if (has(mutatorMap, alias)) map = mutatorMap[alias];
  mutatorMap[alias] = map;
  map._inherits = map._inherits || [];

  map._inherits.push(node);

  map._key = node.key;

  if (node.computed) {
    map._computed = true;
  }

  if (node.decorators) {
    const decorators = map.decorators = map.decorators || arrayExpression([]);
    decorators.elements.push(...node.decorators.map(dec => dec.expression).reverse());
  }

  if (map.value || map.initializer) {
    throw file.buildCodeFrameError(node, "Key conflict with sibling node");
  }

  let key, value;

  if (isObjectProperty(node) || isObjectMethod(node) || isClassMethod(node)) {
    key = toComputedKey(node, node.key);
  }

  if (isProperty(node)) {
    value = node.value;
  } else if (isObjectMethod(node) || isClassMethod(node)) {
    value = functionExpression(null, node.params, node.body, node.generator, node.async);
    value.returnType = node.returnType;
  }

  const inheritedKind = toKind(node);

  if (!kind || inheritedKind !== "value") {
    kind = inheritedKind;
  }

  if (scope && isStringLiteral(key) && (kind === "value" || kind === "initializer") && isFunctionExpression(value)) {
    value = (0, _helperFunctionName.default)({
      id: key,
      node: value,
      scope
    });
  }

  if (value) {
    inheritsComments(value, node);
    map[kind] = value;
  }

  return map;
}

function hasComputed(mutatorMap) {
  for (const key of Object.keys(mutatorMap)) {
    if (mutatorMap[key]._computed) {
      return true;
    }
  }

  return false;
}

function toComputedObjectFromClass(obj) {
  const objExpr = arrayExpression([]);

  for (let i = 0; i < obj.properties.length; i++) {
    const prop = obj.properties[i];
    const val = prop.value;
    val.properties.unshift(objectProperty(identifier("key"), toComputedKey(prop)));
    objExpr.elements.push(val);
  }

  return objExpr;
}

function toClassObject(mutatorMap) {
  const objExpr = objectExpression([]);
  Object.keys(mutatorMap).forEach(function (mutatorMapKey) {
    const map = mutatorMap[mutatorMapKey];
    const mapNode = objectExpression([]);
    const propNode = objectProperty(map._key, mapNode, map._computed);
    Object.keys(map).forEach(function (key) {
      const node = map[key];
      if (key[0] === "_") return;
      const prop = objectProperty(identifier(key), node);
      inheritsComments(prop, node);
      removeComments(node);
      mapNode.properties.push(prop);
    });
    objExpr.properties.push(propNode);
  });
  return objExpr;
}

function toDefineObject(mutatorMap) {
  Object.keys(mutatorMap).forEach(function (key) {
    const map = mutatorMap[key];
    if (map.value) map.writable = booleanLiteral(true);
    map.configurable = booleanLiteral(true);
    map.enumerable = booleanLiteral(true);
  });
  return toClassObject(mutatorMap);
}