44 lines
1013 B
TypeScript
44 lines
1013 B
TypeScript
import { serviceDb, type ServiceDoc } from "./dbs";
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export class ServiceSeqTracker {
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/**
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* @param _id
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* @constructor
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*/
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static async Init(_id: string) {
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const serviceDoc = await serviceDb.get(_id).catch((error) => {
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if (error.name === "not_found") {
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return {
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_id,
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lastSeq: "0",
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};
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}
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throw error; // Re-throw other errors
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});
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return new ServiceSeqTracker(serviceDoc);
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}
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private constructor(private serviceDoc: ServiceDoc) {}
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get lastSeq() {
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return this.serviceDoc.lastSeq;
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}
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checkNextSeq(seq: number | string) {
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if (!this.serviceDoc) {
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}
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const next = parseInt(seq as string, 10);
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const current = parseInt(this.serviceDoc.lastSeq as string, 10);
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if (next < current) {
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throw new Error(
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`Sequence number is too old: ${seq} (${next} < ${current})`,
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);
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}
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}
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saveSeq(seq: number | string) {
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this.serviceDoc.lastSeq = seq;
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return serviceDb.put(this.serviceDoc);
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}
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}
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