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// Copyright Epic Games, Inc. All Rights Reserved.
"use strict";
import { Fetcher } from "../util/fetcher.js"
////////////////////////////////////////////////////////////////////////////////
export class Message
{
static None = 0; //
static Init = 1; // project_id, oplog
static Map = 2; // start, end, page_size, stride
static MapPage = 3; // page
static MapDone = 4; //
static create(msg, ...args) { return [msg, ...args]; }
}
////////////////////////////////////////////////////////////////////////////////
async function map_id_to_key(project_id, oplog, start, end, page_size, stride)
{
if (start >= end)
return postMessage(Message.create(Message.MapDone));
const uri = "/prj/" + project_id + "/oplog/" + oplog + "/entries";
const fetch_page = async function(index) {
const cbo = new Fetcher()
.resource(uri)
.param("start", index)
.param("count", page_size)
.param("fieldfilter", "packagedata,key")
.cbo()
const entry_count = Math.min(page_size, -(index - end));
return [await cbo, entry_count];
};
var fetch = fetch_page(start);
while (fetch !== undefined)
{
performance.mark("fetch");
const [cbo, entry_count] = await fetch;
start += stride;
fetch = (start < end) ? fetch_page(start) : undefined;
var entries = (await cbo).as_object().find("entries");
if (entries == undefined)
break;
entries = entries.as_array();
if (entries.num() == 0)
break;
performance.mark("build");
var count = 0;
var result = new Array(entry_count);
for (var entry of entries)
{
if (!entry.is_object())
continue
entry = entry.as_object();
var key = undefined;
var pkg_data = undefined;
for (const field of entry)
{
if (field.is_named("key")) key = field;
else if (field.is_named("packagedata")) pkg_data = field;
}
if (key == undefined || pkg_data == undefined)
continue;
var id = 0n;
for (var item of pkg_data.as_array())
{
var pkg_id = item.as_object().find("id");
if (pkg_id == undefined)
continue;
pkg_id = pkg_id.as_value().subarray(0, 8);
for (var i = 7; i >= 0; --i)
{
id <<= 8n;
id |= BigInt(pkg_id[i]);
}
break;
}
if (id == 0)
continue;
result[count] = [id, key.as_value()];
count++;
}
if (count == 0)
continue;
if (count != result.length)
result = result.slice(0, count);
performance.mark("sort");
result.sort(function(l, r) { return Number(l[0] - r[0]); });
const msg = Message.create(Message.MapPage, result);
postMessage(msg);
}
postMessage(Message.create(Message.MapDone));
}
////////////////////////////////////////////////////////////////////////////////
function worker_scope()
{
var project_id;
var oplog;
return (evt) => {
const [msg_id, ...params] = evt.data;
switch (msg_id)
{
case Message.Init:
[project_id, oplog] = params;
break;
case Message.Map:
var [start, end, page_size, stride] = params;
map_id_to_key(project_id, oplog, start, end, page_size, stride);
break;
}
}
}
////////////////////////////////////////////////////////////////////////////////
if (typeof DedicatedWorkerGlobalScope != "undefined" && self instanceof DedicatedWorkerGlobalScope)
{
onmessage = worker_scope();
}
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