Revert "remove common/script/src"

This reverts commit 7c5572608f.

common/script/src/content/eggs/quest.js

@@ -0,0 +1,65 @@
+import {generateEggs} from '../helpers';
+
+const QUEST_EGGS = [
+  'Gryphon',
+  'Hedgehog',
+  'Deer',
+  'Egg',
+  'Rat',
+  'Octopus',
+  'Seahorse',
+  'Parrot',
+  'Rooster',
+  'Spider',
+  'Owl',
+  'Penguin',
+  'TRex',
+  'Rock',
+  'Bunny',
+  'Slime',
+  'Sheep',
+  'Cuttlefish',
+  'Whale',
+  'Cheetah',
+  'Horse',
+  'Frog'
+];
+
+let eggDefaults = {
+  type: 'quest',
+  canBuy: (key) => {
+    return _generateQuestAchievementRequirement(key);
+  },
+};
+
+let eggs = generateEggs(QUEST_EGGS, eggDefaults);
+
+// Exceptions to normal defaults
+eggs.TRex.canBuy = (user) => {
+  let achievements = user.achievements.quests;
+
+  if (achievements) {
+    return achievements.trex > 0 ||
+      achievements.trex_undead > 0;
+  }
+}
+
+eggs.Deer.canBuy = _generateQuestAchievementRequirement('ghost_stag');
+eggs.Seahorse.canBuy = _generateQuestAchievementRequirement('dilatory_derby');
+eggs.Parrot.canBuy = _generateQuestAchievementRequirement('harpy');
+eggs.Cuttlefish.canBuy = _generateQuestAchievementRequirement('kraken');
+
+eggs.Egg.canBuy = () => { return false; }
+
+function _generateQuestAchievementRequirement(name) {
+  return (user) => {
+    let achievements = user.achievements.quests;
+    let questKey = name.toLowerCase();
+
+    if (achievements) {
+      return achievements[questKey] > 0;
+    }
+  };
+}
+
+export default eggs;