respond-framework/dist/createModule/reducers/stack.js

create as fast you think

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _kinds = require("../kinds.js");
const stack = function (state = {
  entries: [],
  index: -1
}, e, {
  respond
}) {
  if (e.kind !== _kinds.navigation) return state;
  if (e.meta.parallel) return state;
  const {
    entries,
    index: i
  } = state;
  if (respond.isEqualNavigations(e, entries[i])) {// current event repeated
  } else if (respond.isEqualNavigations(e, entries[i - 1])) {
    // back
    state.index = Math.max(i - 1, 0);
  } else if (respond.isEqualNavigations(e, entries[i + 1])) {
    // next
    state.index = i + 1;
  } else {
    entries.splice(i + 1, entries.length, e); // push -- delete stale tail like browser history.push
    state.index = entries.length - 1;
  }
  return state;
};
var _default = exports.default = stack;