angarg12 / nucleogenesis

'use strict';

angular

  .module('game')

  .service('savegame', ['$state',

    'state',

    'data',

    function ($state, state, data) {

      this.initSave = function () {

        state.player = {};

        this.versionControl();

        state.init();

        $state.go('matter');

      };

      this.save = function () {

        localStorage.setItem('player', JSON.stringify(state.player));

      };

      this.load = function () {

        try {

          let storedPlayer = localStorage.getItem('player');

          if (!storedPlayer) {

            this.initSave();

          } else {

            state.player = JSON.parse(storedPlayer);

            this.versionControl();

          }

        } catch (err) {

          alert('Error loading savegame, reset forced.');

          this.initSave();

        }

      };

      this.versionControl = function () {

        // delete saves older than this version

        if (state.player.version && versionCompare(state.player.version, '2.1.0') < 0) {

          state.player = {};

        }

        // we merge the properties of the player with the start player to

        // avoid undefined errors with new properties

        state.player = angular.merge({}, data.start_player, state.player);

        // append an id if it doesn't exist

        if (!state.player.id) {

          state.player.id = Math.random().toString().substring(3);

        }

        // old saves may have outdated reactions, which crash the game

        for(let react in state.player.reactions){

          if(typeof data.reactions[react] === 'undefined'){

            delete state.player.reactions[react];

          }

        }

        // old saves may have outdated resources, which crash the game

        for(let resource in state.player.resources){

          if(typeof data.resources[resource] === 'undefined'){

            delete state.player.resources[resource];

          }

        }

      };

    }

  ]);