binary encode

apps/client/assets/Scripts/Utils/index.ts

@@ -1,4 +1,5 @@
 import { SpriteFrame } from "cc"
+import { ApiMsgEnum, InputTypeEnum, strdecode } from "../Common"
 
 const INDEX_REG = /\((\d+)\)/
 
@@ -9,4 +10,78 @@ export const sortSpriteFrame = (spriteFrame: Array<SpriteFrame>) =>
 
 export const rad2Angle = (rad: number) => rad / Math.PI * 180
 
-export const toFixed = (num: number, digit: number = 4): number => Math.floor(num * 10 ** digit) / 10 ** digit
+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))))
+    }
+  }
+}