memcache-client
Version:
NodeJS memcached client
59 lines • 2.3 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
/* eslint-disable no-bitwise,no-magic-numbers,max-params,no-unused-vars,max-statements,no-var */
/* eslint max-len:[2,120] */
const assert_1 = tslib_1.__importDefault(require("assert"));
const value_flags_1 = require("./value-flags");
class ValuePacker {
constructor(compressor) {
this.compressor = compressor;
}
pack(value, compress) {
const valueType = typeof value;
const isBuffer = Buffer.isBuffer(value);
var flag = 0;
if (isBuffer) {
flag = value_flags_1.ValueFlags.TYPE_BINARY;
}
else if (valueType === "number") {
flag = value_flags_1.ValueFlags.TYPE_NUMERIC;
value = JSON.stringify(value);
}
else if (valueType === "object") {
flag = value_flags_1.ValueFlags.TYPE_JSON;
value = JSON.stringify(value);
}
if (compress && value.length >= 100) {
(0, assert_1.default)(this.compressor !== undefined, "No compressor available to compress value");
flag |= value_flags_1.ValueFlags.COMPRESS;
if (!isBuffer) {
value = Buffer.from(value);
}
value = this.compressor.compressSync({ input: value });
}
return { flag, data: value };
}
unpack(packed) {
const flag = packed.flag;
const compress = (flag & value_flags_1.ValueFlags.COMPRESS) === value_flags_1.ValueFlags.COMPRESS;
var data = packed.data;
if (compress) {
(0, assert_1.default)(this.compressor !== undefined, "No compressor available to decompress data");
data = this.compressor.decompressSync({ input: data });
}
const type = flag & value_flags_1.ValueFlags.TYPE_ALL;
if (type === value_flags_1.ValueFlags.TYPE_NUMERIC) {
data = +data.toString();
}
else if (type === value_flags_1.ValueFlags.TYPE_JSON) {
data = JSON.parse(data);
}
else if (type !== value_flags_1.ValueFlags.TYPE_BINARY) {
data = data.toString();
}
return data;
}
}
exports.default = ValuePacker;
//# sourceMappingURL=value-packer.js.map