// Metro module 581 (f582).
const Emitter = function Emitter(a0) {
  if (a0) {
    const prototype = Emitter.prototype;
    for (const key in prototype) {
      a0[key] = Emitter.prototype[key];
    }
    return a0;
  }
};
if (module !== void 0) {
  module.exports = Emitter;
}
const { prototype: prototype4, prototype } = Emitter;
const addEventListener2 = function(a0, a1) {
  this._callbacks = this._callbacks || {};
  const _callbacks = this._callbacks;
  const r6 = "$" + a0;
  const r8 = this._callbacks["$" + a0] || [];
  _callbacks[r6] = r8;
  r8.push(a1);
  return this;
};
prototype.addEventListener = addEventListener2;
prototype4.on = addEventListener2;
Emitter.prototype.once = function(a0, a1) {
  const on2 = function on() {
    this.off(a0, on2);
    a1.apply(this, arguments);
  };
  on2.fn = a1;
  this.on(a0, on2);
  return this;
};
const { prototype: prototype5, prototype: prototype6, prototype: prototype2, prototype: prototype3 } = Emitter;
const removeEventListener = function(a0, a1) {
  this._callbacks = this._callbacks || {};
  if (arguments.length == 0) {
    this._callbacks = {};
    return this;
  }
  const r16 = this._callbacks["$" + a0];
  if (r16) {
    if (arguments.length == 1) {
      delete this._callbacks["$" + a0];
      return this;
    }
    const r5 = 0 < r16.length;
    let r0 = 0;
    if (r5) {
      while (true) {
        const r19 = r16[r0];
        const r1 = r0;
        if (r19 !== a1 && r19.fn !== a1) {
          r0 = r1 + 1;
          if (r0 < r16.length) {
            continue;
          }
          break;
        }
        r16.splice(r1, 1);
        break;
      }
    }
    if (r16.length === 0) {
      delete this._callbacks["$" + a0];
    }
    return this;
  }
  return this;
};
prototype3.removeEventListener = removeEventListener;
prototype2.removeAllListeners = removeEventListener;
prototype6.removeListener = removeEventListener;
prototype5.off = removeEventListener;
Emitter.prototype.emit = function(a0) {
  this._callbacks = this._callbacks || {};
  const array = new Array(arguments.length - 1);
  const r21 = this._callbacks["$" + a0];
  const r3 = 1 < arguments.length;
  let r0 = 1;
  if (r3) {
    do {
      array[r0 - 1] = arguments[r0];
      r0 = r0 + 1;
    } while (r0 < arguments.length);
  }
  if (r21) {
    let r28 = 0;
    const r29 = r21.slice(0);
    const length = r29.length;
    if (0 < length) {
      do {
        r29[r28].apply(this, array);
        r28 = r28 + 1;
      } while (r28 < length);
    }
  }
  return this;
};
Emitter.prototype.listeners = function(a0) {
  this._callbacks = this._callbacks || {};
  return this._callbacks["$" + a0] || [];
};
Emitter.prototype.hasListeners = function(a0) {
  return !!this.listeners(a0).length;
};