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| import {
isNode,
} from '../isNode';
import {
isUUIDVersion,
} from '../TypeGuards/isUUIDVersion';
import {
IUUID,
} from './IUUID';
import {
IUUIDComponentValues,
} from './IUUIDComponentValues';
import {
IUUIDOptions,
} from './UUIDOptions/IUUIDOptions';
import {
makeVersionFourOrNilUUIDValues,
} from './makeVersionFourOrNilUUIDValues';
import {
makeVersionOneUUIDValues,
} from './makeVersionOneUUIDValues';
import {
makeVersionThreeOrFiveUUIDValues,
} from './makeVersionThreeOrFiveUUIDValues';
import {
mergeUUIDOptions,
} from './UUIDOptions/mergeUUIDOptions';
import {
strings,
} from '../strings';
import {
uintArrayAsHex,
} from '../uintArrayAsHex';
import {
uintArrayAsBigNumber,
} from '../uintArrayAsBigNumber';
import {
UUIDOptions,
} from './UUIDOptions/UUIDOptions';
import {
UUIDVersions,
} from '../Enums/UUIDVersions';
import {
writeNewResults,
} from '../writeNewResults';
/* The formal Augmented Backus-Naur Form grammar for UUIDs is as follows,
* courtesy RFC-4112:
* The formal definition of the UUID string representation is
* provided by the following ABNF:
*
* UUID = time-low "-" time-mid "-"
* time-high-and-version "-"
* clock-seq-high-and-reserved
* clock-seq-low "-" node
* time-low = 4hexOctet/8hexDigit
* time-mid = 2hexOctet/4hexDigit
* time-high-and-version = 2hexOctet/4hexDigit
* clock-seq-high-and-reserved = hexOctet/2hexDigit
* clock-seq-low = hexOctet/2hexDigit
* node = 6hexOctet/12hexDigit
* hexOctet = hexDigit hexDigit
* hexDigit =
* "0" / "1" / "2" / "3" / "4" / "5" / "6" / "7" / "8" / "9" /
* "a" / "b" / "c" / "d" / "e" / "f" /
* "A" / "B" / "C" / "D" / "E" / "F"
*/
export class UUID implements IUUID {
constructor(argOptions?: Partial<IUUIDOptions>) {
const base = new UUIDOptions();
const options = argOptions ? mergeUUIDOptions(base, argOptions) : base;
let version = options.version.toString();
if (!isUUIDVersion(version)) {
throw new Error(strings.UUID_VERSION_INVALID);
}
if (!isNode() && version === UUIDVersions.One) {
throw new Error(strings.VERSION_1_IN_BROWSER);
}
this.__version = version;
const {
clockSequence,
nodeIdentifier,
shouldWrite,
timestamp,
}: IUUIDComponentValues & { shouldWrite?: boolean, } = (() => {
if (version === UUIDVersions.One) {
return makeVersionOneUUIDValues(options);
} else if (version === UUIDVersions.Three ||
version === UUIDVersions.Five)
{
return makeVersionThreeOrFiveUUIDValues(options);
} else {
/* Version four or nil. */
return makeVersionFourOrNilUUIDValues(options);
}
})();
this.__clockSequence = clockSequence;
this.__nodeIdentifier = nodeIdentifier;
this.__timestamp = timestamp;
if (shouldWrite) {
writeNewResults(this);
}
}
/* istanbul ignore next */
get id() {
return this.toString();
}
/* Parsed into 4 bits. */
private __version: UUIDVersions;
get version(): UUIDVersions {
return this.__version;
}
/* 60 bits */
private __timestamp: Uint8Array;
get timestamp(): Uint8Array {
return this.__timestamp;
}
/* 4 bytes */
get timeLow(): Uint8Array {
return this.timestamp.slice(4, 8);
}
/* 2 bytes */
get timeMid(): Uint8Array {
return this.timestamp.slice(2, 4);
}
/* 12 bits */
get timeHigh(): Uint8Array {
return this.timestamp.slice(0, 2);
}
/* 14 bits */
private __clockSequence: Uint8Array;
get clockSequence(): Uint8Array {
return this.__clockSequence;
}
/* 1 byte */
get clockSequenceLow(): Uint8Array {
return this.clockSequence.slice(1);
}
/* 1 byte */
get clockSequenceHigh(): Uint8Array {
return this.clockSequence.slice(0, 1);
}
/* 4 bits. */
/* istanbul ignore next */
get reserved(): Uint8Array {
return new Uint8Array([ 2, ]);
}
/* 1 byte. */
get clockSequenceHighAndReserved(): Uint8Array {
const clockHigh = uintArrayAsBigNumber(this.clockSequenceHigh).toString(2);
/* istanbul ignore next */
const reserved = this.version === UUIDVersions.Nil ?
'0' :
uintArrayAsBigNumber(this.reserved).toString(2);
const byte = clockHigh.padStart(6, '0') + reserved.padStart(2, '0');
return new Uint8Array([ parseInt(byte, 2), ]);
}
/* 6 bytes */
private __nodeIdentifier: Uint8Array;
get nodeIdentifier(): Uint8Array {
return this.__nodeIdentifier;
}
/* text: e.g. '103314af-205e-0080-002b-7cd2a900a098' */
static parse(text: string): IUUID {
const split = text.split('-');
if (split.length !== 5) {
throw new Error(strings.UUID_STRING_INVALID);
}
const timeLow = split[0];
const timeMid = split[1];
const timeHighAndVersion = split[2];
const timeHigh = timeHighAndVersion.slice(0, 3);
const version = timeHighAndVersion[0];
const timestampHex = timeHigh + timeMid + timeLow;
const timestampArr = [];
for (let ii = 0; ii < 16; ii += 2) {
timestampArr.push(parseInt(timestampHex.slice(ii, ii + 2), 16));
}
const timestamp = new Uint8Array(timestampArr);
const clockSequenceHighAndReservedAndLow = split[3];
const clockSequenceHighAndReservedHex =
clockSequenceHighAndReservedAndLow.slice(0, 2);
const clockSequenceHighHex =
parseInt(
parseInt(clockSequenceHighAndReservedHex, 16).toString(2).slice(2),
2
).toString(16);
const clockSequenceLowHex =
clockSequenceHighAndReservedAndLow.slice(2, 4);
const clockSequenceHex = clockSequenceLowHex + clockSequenceHighHex;
const clockSequenceArr = [];
for (let ii = 0; ii < 7; ii += 2) {
clockSequenceArr.push(parseInt(clockSequenceHex.slice(ii, ii + 2), 16));
}
const clockSequence = new Uint8Array(clockSequenceArr);
const nodeIdentifierHex = split[4];
const nodeIdentifierArr = [];
for (let ii = 0; ii < 12; ii += 2) {
nodeIdentifierArr.push(parseInt(nodeIdentifierHex.slice(ii, ii + 2), 16));
}
const nodeIdentifier = new Uint8Array(nodeIdentifierArr);
const obj = {
__version: version,
get version() {
return obj.__version;
},
__timestamp: timestamp,
get timestamp() {
return obj.__timestamp;
},
__clockSequence: clockSequence,
get clockSequence() {
return obj.__clockSequence;
},
__nodeIdentifier: nodeIdentifier,
get nodeIdentifier() {
return obj.__nodeIdentifier;
},
};
return Object.assign({}, this.prototype, obj);
}
toString(): string {
const format = (value: Uint8Array, toPad: number) => (
uintArrayAsHex(value)
/* Pad any missing most-significant-digits. */
.padStart(toPad, '0')
);
return (
format(this.timeLow, 8) +
'-' +
format(this.timeMid, 4) +
'-' +
`${this.version}${format(this.timeHigh, 3)}` +
'-' +
`${format(this.clockSequenceHighAndReserved, 2)}${format(this.clockSequenceLow, 2)}` +
'-' +
format(this.nodeIdentifier, 12)
);
}
}
export default UUID;
|