52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
import { integrateRemoteStructs } from '../MessageHandler/integrateRemoteStructs.js'
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import { writeStructs } from '../MessageHandler/syncStep1.js'
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import { writeDeleteSet, readDeleteSet } from '../MessageHandler/deleteSet.js'
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export const PERSIST_UPDATE = 0
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/**
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* Write an update to an encoder.
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*
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* @param {Yjs} y A Yjs instance
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* @param {BinaryEncoder} updateEncoder I.e. transaction.encodedStructs
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*/
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export function encodeUpdate (y, updateEncoder, encoder) {
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encoder.writeVarUint(PERSIST_UPDATE)
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encoder.writeBinaryEncoder(updateEncoder)
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}
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export const PERSIST_STRUCTS_DS = 1
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/**
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* Write the current Yjs data model to an encoder.
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*
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* @param {Yjs} y A Yjs instance
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* @param {BinaryEncoder} encoder An encoder to write to
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*/
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export function encodeStructsDS (y, encoder) {
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encoder.writeVarUint(PERSIST_STRUCTS_DS)
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writeStructs(y, encoder, new Map())
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writeDeleteSet(y, encoder)
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}
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/**
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* Feed the Yjs instance with the persisted state
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* @param {Yjs} y A Yjs instance.
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* @param {BinaryDecoder} decoder A Decoder instance that holds the file content.
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*/
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export function decodePersisted (y, decoder) {
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y.transact(() => {
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while (decoder.hasContent()) {
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const contentType = decoder.readVarUint()
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switch (contentType) {
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case PERSIST_UPDATE:
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integrateRemoteStructs(decoder, y)
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break
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case PERSIST_STRUCTS_DS:
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integrateRemoteStructs(decoder, y)
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readDeleteSet(y, decoder)
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break
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}
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}
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}, true)
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}
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