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refactor: extract out getStructsToWrite

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Jens Claes 2022-09-23 09:54:36 +02:00
parent a69ecb0287
commit 9ff1f1c5af
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1 changed files with 17 additions and 5 deletions
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22
src/utils/encoding.js
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@ -46,6 +46,18 @@ import * as binary from 'lib0/binary'
import * as map from 'lib0/map'
import * as math from 'lib0/math'
/**
* @param {Array<GC|Item>} structs All structs by `client`
* @param {number} minClock write structs starting with `ID(client,minClock)`
*
* @function
*/
const getStructsToWrite = (structs, minClock) => {
minClock = math.max(minClock, structs[0].id.clock) // make sure the first id exists
const startNewStructs = findIndexSS(structs, minClock)
return structs.slice(startNewStructs)
}
/**
* @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
* @param {Array<GC|Item>} structs All structs by `client`
@ -57,16 +69,16 @@ import * as math from 'lib0/math'
const writeStructs = (encoder, structs, client, clock) => {
// write first id
clock = math.max(clock, structs[0].id.clock) // make sure the first id exists
const startNewStructs = findIndexSS(structs, clock)
const newStructs = getStructsToWrite(structs, clock, maxClock)
// write # encoded structs
encoding.writeVarUint(encoder.restEncoder, structs.length - startNewStructs)
encoding.writeVarUint(encoder.restEncoder, newStructs.length)
encoder.writeClient(client)
encoding.writeVarUint(encoder.restEncoder, clock)
const firstStruct = structs[startNewStructs]
const firstStruct = newStructs[0]
// write first struct with an offset
firstStruct.write(encoder, clock - firstStruct.id.clock)
for (let i = startNewStructs + 1; i < structs.length; i++) {
structs[i].write(encoder, 0)
for (let i = 1; i < newStructs.length; i++) {
newStructs[i].write(encoder, 0)
}
}