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/* 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 { createSelector } = require("devtools/client/shared/vendor/reselect");
/**
* Gets the total number of bytes representing the cumulated content size of
* a set of requests. Returns 0 for an empty set.
*
* @param {array} items - an array of request items
* @return {number} total bytes of requests
*/
function getContentSizeOfRequests(items) {
if (!items.length) {
return 0;
}
let result = 0;
items.forEach((item) => {
let size = item.attachment.contentSize;
result += (typeof size == "number") ? size : 0;
});
return result;
}
function getTransferredSizeOfRequests(items) {
if (!items.length) {
return 0;
}
let result = 0;
items.forEach((item) => {
let size = item.attachment.transferredSize;
result += (typeof size == "number") ? size : 0;
});
return result;
}
/**
* Gets the total milliseconds for all requests. Returns null for an
* empty set.
*
* @param {array} items - an array of request items
* @return {object} total milliseconds for all requests
*/
function getMillisOfRequests(items) {
if (!items.length) {
return null;
}
const oldest = items.reduce((prev, curr) =>
prev.attachment.startedMillis < curr.attachment.startedMillis ?
prev : curr);
const newest = items.reduce((prev, curr) =>
prev.attachment.startedMillis > curr.attachment.startedMillis ?
prev : curr);
return newest.attachment.endedMillis - oldest.attachment.startedMillis;
}
const getDisplayedRequestsSummary = createSelector(
(state) => state.requests.items,
(requests) => ({
count: requests.length,
contentSize: getContentSizeOfRequests(requests),
transferredSize: getTransferredSizeOfRequests(requests),
millis: getMillisOfRequests(requests),
})
);
module.exports = {
getDisplayedRequestsSummary,
};
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