blackmagic-atem-nodered/commands/transitionMix.js

Provides control of a BlackMagic ATEM

const commandList = require("./commandList.js");

module.exports = {
  object: function() { return {
    get: "TMxP",
    set: "CTMx",
    cmd: "transitionMix",
    data: {},
    close() {
      this.data = {};
    },
    initializeData(data, flag, commands) {
      var command = {"payload":{"data":{}}};
      this.processData(data, flag, command, commands);
    },
    processData(data, flag, command, commands) {
      this.data[data[0]] = {
        "rate": data[1]
      }
  
      command.payload.data = this.data;
      command.payload.cmd = this.cmd;
      
      return flag==commandList.flags.sync;
    },
    sendData(command, commands) {
      var error = null;
      var msg = {
        "direction": "node",
        "name": this.set,
        "command": {
          "payload": {
            "cmd": this.cmd,
            "data": "The data was not filled"
          }
        }
      }
  
      if(command.payload.data == undefined || command.payload.data == null) {
        msg.direction = "node";
        msg.command.payload.data = this.data;
      }
      else {
        var me = parseInt(command.payload.data.ME);
        var rate = parseInt(command.payload.data.rate);
        if(me == undefined || me == null || Number.isNaN(me)) {
          error="The ME was not stated this is expected to be the ME number starting at 0";
        }
        if(rate == undefined || rate == null || Number.isNaN(rate)) {
          error="The rate was not stated this is a expected to be a number between 1-250 (frames)";
        }
        if(rate < 1 || rate > 250){
          error="The rate needs to be between 1 and 250 (frames) you sent " + command.payload.data.rate;
        }
  
        if(error === null) {
          //Process packet
          var packet = Buffer.alloc(4).fill(0);
          packet[0] = command.payload.data.ME;
          packet[1] = command.payload.data.rate;
          msg.direction = "server";
          msg.command.packet = packet;
        }
        else {
          //We had an error
          var msg = {
            "direction": "node",
            "command": {
              "payload": {
                "cmd": this.cmd,
                "data": error
              }
            }
          }
        }
      }
      return msg;
    },
    //What todo once we are connected
    afterInit(commands) {
      return {
        "cmd": this.cmd,
        "data": this.data
      }
    }    
  }}
}