angarg12 / nucleogenesis

    function() {

      this.visible = function(items, func, currentElement, sortFunc, player) {

        let visibles = [];

        for (let i in items) {

          // if it is an array, we need to extract the item from the index

          let item = Array.isArray(items) ? items[i] : i;

          if (func(item, currentElement, player)) {

            visibles.push(item);

          }

        }

        if(sortFunc){

          visibles.sort(sortFunc);

        }

        return visibles;

      };

      this.isUpgradeVisible = function(name, slot, upgrade, player) {

        if (upgrade.tiers) {

          for (let tier of upgrade.tiers) {

            if (slot.generators[tier] === 0) {

              return false;

            }

          }

        }

        return meetDependencies(slot.upgrades, upgrade.deps) &&

          meetDependencies(player.exotic_upgrades[slot.element], upgrade.exotic_deps) &&

          meetDependencies(player.dark_upgrades, upgrade.dark_deps);

      };

      function meetDependencies(upgrades, dependencies) {

        if(!dependencies){

          return true;

        }

        for (let dep of dependencies) {

          if (!upgrades[dep]) {

            return false;

          }

        }

        return true;

      }

    }

  ]);