BerserkItemMacro.js

const lastArg = args[args.length - 1]
let act = await fromUuid(lastArg.actorUuid)
let calmData = {
  "changes": [{ "key": "macro.itemMacro", "mode": 0, "value": 0, "priority": 20 }],
  "origin": lastArg.origin,
  "icon": "systems/dnd5e/icons/skills/red_02.jpg",
  "label": "Berserker Calm",
  "transfer": true,
  "flags": {
    "dae": {
      "stackable": "none",
      "macroRepeat": "none",
      "specialDuration": [
        "isDamaged"
      ],
      "transfer": true
    }
  }
}
let rageData = {
  "changes": [{ "key": "macro.itemMacro", "mode": 0, "value": 0, "priority": 20 }],
  "label": "Berserker Rage",
  "origin": lastArg.origin,
    "flags": {
      "core": {
        "statusId": "berserk"
      }
    },
    "icon": "systems/dnd5e/icons/skills/red_01.jpg"
}

if (args[0] === "off") {
  let item = await fromUuid(lastArg.origin)
  if (!item.data.data.equipped) {
    await act.createEmbeddedDocuments("ActiveEffect", [lastArg.efData])
  } else if (lastArg.efData.label === "Berserker Calm") {
    let roll = await act.rollAbilitySave("wis")
    if (roll.total < 15) {
      await act.createEmbeddedDocuments("ActiveEffect", [rageData])
    } else {
      await act.createEmbeddedDocuments("ActiveEffect", [calmData])
    }
  } else {
    await act.createEmbeddedDocuments("ActiveEffect", [calmData])
  }
}