Function writeClientsStructs

src/utils/encoding.js:115–138

(encoder, store, _sm)

 * @function
 */
export const writeClientsStructs = (encoder, store, _sm) => {
  // we filter all valid _sm entries into sm
  const sm = new Map()
  _sm.forEach((clock, client) => {
    // only write if new structs are available
    if (getState(store, client) > clock) {
      sm.set(client, clock)
    }
  })
  getStateVector(store).forEach((_clock, client) => {
    if (!_sm.has(client)) {
      sm.set(client, 0)
    }
  })
  // write # states that were updated
  encoding.writeVarUint(encoder.restEncoder, sm.size)
  // Write items with higher client ids first
  // This heavily improves the conflict algorithm.
  array.from(sm.entries()).sort((a, b) => b[0] - a[0]).forEach(([client, clock]) => {
    const structs = /** @type {Array<GC|Item>} */ (store.clients.get(client))
    const lastStruct = structs[structs.length - 1]
    writeStructs(encoder, structs, client, [new IdRange(clock, lastStruct.id.clock + lastStruct.length - clock)])
  })
}

/**
 * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder