snowflakify
Version:
The most complete Snowflake ID generator in TypeScript
37 lines (36 loc) • 951 B
JavaScript
import FragmentBase from '../FragmentBase.js';
/**
* SequenceFragment class for sequence (increment/counter) IDs.
* @public
*/
export default class SequenceFragment extends FragmentBase {
getValue() {
this.value = (this.value + BigInt(1)) & this.maxValue;
return this.value;
}
destructure(snowflake) {
const bits = BigInt(snowflake) & this.bitMask;
return {
identifier: this.identifier,
value: Number(bits >> this.bitShift),
};
}
/**
* Returns a boolean indicating whether the sequence will reset on the next call.
*
* @returns `true` if the sequence will reset when the next getValue() is called.
* Otherwise, returns `false`.
* @internal
*/
willReset() {
return ((this.value + BigInt(1)) & this.maxValue) === BigInt(0);
}
/**
* Resets the sequence to 0
* @internal
*/
resetSequence() {
this.value = BigInt(0);
}
}
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