39 lines
963 B
TypeScript
39 lines
963 B
TypeScript
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import { serviceDb, type ServiceDoc } from "./dbs";
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const SERVICE_DOC_ID = "_local/service:message-delivery-method-web-push";
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export class ServiceSeqTracker {
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private serviceDoc: ServiceDoc;
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async getSince() {
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this.serviceDoc = await serviceDb.get(SERVICE_DOC_ID).catch((error) => {
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if (error.name === "not_found") {
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return {
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_id: SERVICE_DOC_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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this.serviceDoc.lastSeq = 0;
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return this.serviceDoc.lastSeq;
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}
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checkNextSeq(seq: number | string) {
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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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