cocos-nodejs-io-game/apps/client/assets/Scripts/Utils/index.ts

import { SpriteFrame } from "cc"
import { ApiMsgEnum, InputTypeEnum, strdecode } from "../Common"

const INDEX_REG = /\((\d+)\)/

const getNumberWithinString = (str: string) => parseInt(str.match(INDEX_REG)?.[1] || '0')

export const sortSpriteFrame = (spriteFrame: Array<SpriteFrame>) =>
  spriteFrame.sort((a, b) => getNumberWithinString(a.name) - getNumberWithinString(b.name))

export const rad2Angle = (rad: number) => rad / Math.PI * 180

export const binaryDecode = (buffer: ArrayBuffer) => {
  let index = 0
  const view = new DataView(buffer)
  const type = view.getUint8(index++)

  if (type === ApiMsgEnum.MsgClientSync) {
    const inputType = view.getUint8(index++)
    if (inputType === InputTypeEnum.ActorMove) {
      const id = view.getUint8(index++)
      const directionX = view.getFloat32(index)
      index += 4
      const directionY = view.getFloat32(index)
      index += 4
      const dt = view.getFloat32(index)
      index += 4
      const msg = {
        name: ApiMsgEnum.MsgClientSync,
        data: {
          type: InputTypeEnum.ActorMove,
          id,
          direction: {
            x: directionX,
            y: directionY,
          },
          dt
        }
      }

      return msg
    } else if (inputType === InputTypeEnum.WeaponShoot) {
      const id = view.getUint8(index++)
      const positionX = view.getFloat32(index)
      index += 4
      const positionY = view.getFloat32(index)
      index += 4
      const directionX = view.getFloat32(index)
      index += 4
      const directionY = view.getFloat32(index)
      index += 4
      const msg = {
        name: ApiMsgEnum.MsgClientSync,
        data: {
          type: InputTypeEnum.WeaponShoot,
          id,
          position: {
            x: positionX,
            y: positionY,
          },
          direction: {
            x: directionX,
            y: directionY,
          },
        }
      }

      return msg
    } else {
      const dt = view.getFloat32(index)
      index += 4
      const msg = {
        name: ApiMsgEnum.MsgClientSync,
        data: {
          type: InputTypeEnum.TimePast,
          dt,
        }
      }
      return msg
    }
  } else {
    return {
      name: type,
      data: JSON.parse(strdecode(new Uint8Array(buffer.slice(1))))
    }
  }
}