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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const constants = require("../constants");
/**
* Initial state definition
*/
function getInitialState() {
return new Map();
}
/**
* Maintain a cache of received grip responses from the backend.
*/
function grips(state = getInitialState(), action) {
// This reducer supports only one action, fetching actor properties
// from the backend so, bail out if we are dealing with any other
// action.
if (action.type != constants.FETCH_PROPERTIES) {
return state;
}
switch (action.status) {
case "start":
return onRequestProperties(state, action);
case "end":
return onReceiveProperties(state, action);
}
return state;
}
/**
* Handle requestProperties action
*/
function onRequestProperties(state, action) {
return state;
}
/**
* Handle receiveProperties action
*/
function onReceiveProperties(cache, action) {
let response = action.response;
let from = response.from;
let className = action.grip.class;
// Properly deal with getters.
mergeProperties(response);
// Compute list of requested children.
let previewProps = response.preview ? response.preview.ownProperties : null;
let ownProps = response.ownProperties || previewProps || [];
let props = Object.keys(ownProps).map(key => {
// Array indexes as a special case. We convert any keys that are string
// representations of integers to integers.
if (className === "Array" && isInteger(key)) {
key = parseInt(key, 10);
}
return new Property(key, ownProps[key], key);
});
props.sort(sortName);
// Return new state/map.
let newCache = new Map(cache);
newCache.set(from, props);
return newCache;
}
// Helpers
function mergeProperties(response) {
let { ownProperties } = response;
// 'safeGetterValues' is new and isn't necessary defined on old grips.
let safeGetterValues = response.safeGetterValues || {};
// Merge the safe getter values into one object such that we can use it
// in variablesView.
for (let name of Object.keys(safeGetterValues)) {
if (name in ownProperties) {
let { getterValue, getterPrototypeLevel } = safeGetterValues[name];
ownProperties[name].getterValue = getterValue;
ownProperties[name].getterPrototypeLevel = getterPrototypeLevel;
} else {
ownProperties[name] = safeGetterValues[name];
}
}
}
function sortName(a, b) {
// Display non-enumerable properties at the end.
if (!a.value.enumerable && b.value.enumerable) {
return 1;
}
if (a.value.enumerable && !b.value.enumerable) {
return -1;
}
return a.name > b.name ? 1 : -1;
}
function isInteger(n) {
// We use parseInt(n, 10) == n to disregard scientific notation e.g. "3e24"
return isFinite(n) && parseInt(n, 10) == n;
}
function Property(name, value, key) {
this.name = name;
this.value = value;
this.key = key;
}
// Exports from this module
exports.grips = grips;
exports.Property = Property;
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