forked from ppfun/pixelplanet
47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
/* @flow */
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//this script just copies chunks from one redis to another with a different key as needed
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import redis from 'redis';
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import bluebird from 'bluebird';
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bluebird.promisifyAll(redis.RedisClient.prototype);
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bluebird.promisifyAll(redis.Multi.prototype);
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//ATTENTION Make suer to set the rdis URLs right!!!
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const url = "redis://localhost:6379";
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const redis = redis.createClient(url, { return_buffers: true });
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const CANVAS_SIZE = 256 * 256;
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const TILE_SIZE = 256;
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const CHUNKS_XY = CANVAS_SIZE / TILE_SIZE;
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async function moveProtection() {
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for (let x = 0; x < CHUNKS_XY; x++) {
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for (let y = 0; y < CHUNKS_XY; y++) {
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const key = `ch:0:${x}:${y}`;
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const chunk = await redis.getAsync(key);
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if (chunk) {
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const buffer = new Uint8Array(chunk);
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let changed = false;
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for (let u = 0; u < buffer.length; ++u) {
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const bit = buffer[u];
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if (bit & 0x20) {
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// move protected bit from 0x20 to 0x80
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buffer[u] = (bit & 0x1F) | 0x80;
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changed = true;
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}
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}
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if (changed) {
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const setNXArgs = [key, Buffer.from(buffer.buffer).toString('binary')]
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await redis.sendCommandAsync('SETNX', setNXArgs);
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console.log("Changed Chunk ", key);
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}
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}
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}
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}
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}
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moveProtection();
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