pw-js-world
Version:
An optional package for PW-JS-Api, aims to serve world purposes.
100 lines • 8.15 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.uint8ArrayEquals = uint8ArrayEquals;
exports.map = map;
exports.find = find;
exports.findIndex = findIndex;
exports.createBlockPacket = createBlockPacket;
exports.createBlockPackets = createBlockPackets;
const tslib_1 = require("tslib");
const Block_js_1 = tslib_1.__importDefault(require("../Block.js"));
function uint8ArrayEquals(a, b) {
if (a === b) {
return true;
}
if (a.byteLength !== b.byteLength) {
return false;
}
for (let i = 0; i < a.byteLength; i++) {
if (a[i] !== b[i]) {
return false;
}
}
return true;
}
function map(arr, cb) {
const res = [];
if (!Array.isArray(arr))
arr = Array.from(arr.values());
for (let i = 0, len = arr.length; i < len; i++) {
res[i] = cb(arr[i], i, arr);
// if (pred(arr[i], i, arr)) res.push(arr[i]);
}
return res;
}
function find(arr, pred) {
if (!Array.isArray(arr))
arr = Array.from(arr.values());
for (let i = 0, len = arr.length; i < len; i++) {
if (pred(arr[i], i, arr))
return arr[i];
}
return undefined;
}
function findIndex(arr, pred) {
if (!Array.isArray(arr))
arr = Array.from(arr.values());
for (let i = 0, len = arr.length; i < len; i++) {
if (pred(arr[i], i, arr))
return i;
}
return -1;
}
function createBlockPacket(blockId, layer, pos, ...args) {
if (blockId instanceof Block_js_1.default) {
args = blockId.args;
blockId = blockId.bId;
}
else if (typeof blockId !== "number") {
blockId = Block_js_1.default.getIdByName(blockId);
}
if (blockId === undefined)
throw Error("Unknown block ID");
if (layer === undefined || layer < 0 || layer > 2)
throw Error("Unknown layer type");
if (!Array.isArray(pos))
pos = [pos];
return {
isFillOperation: false,
blockId,
layer,
positions: pos,
extraFields: Block_js_1.default.serializeArgs(blockId, args, { endian: "big", writeId: false, readTypeByte: true })
};
}
/**
* Creates sendable packets from given blocks. Attempts to minimise packet count, so it's preferable
* to use it over creating packets with createBlockPacket multiple times.
*/
function createBlockPackets(blocks) {
// Exact max packet position size is unknown, but it was noticed, it works correctly with this size
const MAX_WORLD_BLOCK_PLACED_PACKET_POSITION_SIZE = 200;
const list = [];
for (let i = 0, len = blocks.length; i < len; i++) {
const block = blocks[i];
const packet = createBlockPacket(block.block, block.layer, block.pos);
const existingPacket = find(list, pack => pack.blockId === block.block.bId &&
pack.layer === block.layer &&
pack.positions.length < MAX_WORLD_BLOCK_PLACED_PACKET_POSITION_SIZE &&
uint8ArrayEquals(pack.extraFields, packet.extraFields));
if (existingPacket) {
if (findIndex(existingPacket.positions, pos => block.pos.x === pos.x && block.pos.y === pos.y) === -1) {
existingPacket.positions.push(block.pos);
}
}
else
list.push(packet);
}
return list;
}
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