Added method to transfer character ownership

app/imports/api/creature/creatures/methods/transferCreatureOwnership.js

@@ -0,0 +1,55 @@
+import SimpleSchema from 'simpl-schema';
+import { ValidatedMethod } from 'meteor/mdg:validated-method';
+import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
+import Creatures from '/imports/api/creature/creatures/Creatures.js';
+import { assertOwnership } from '/imports/api/creature/creatures/creaturePermissions.js';
+import { getUserTier } from '/imports/api/users/patreon/tiers.js';
+
+const transferCreatureOwnership = new ValidatedMethod({
+
+  name: 'creatures.methods.transferOwnership',
+
+  validate: new SimpleSchema({
+    creatureId: {
+      type: String,
+      regEx: SimpleSchema.RegEx.Id,
+    },
+    userId: {
+      type: String,
+      regEx: SimpleSchema.RegEx.Id,
+    },
+  }).validator(),
+
+  mixins: [RateLimiterMixin],
+  rateLimit: {
+    numRequests: 5,
+    timeInterval: 5000,
+  },
+
+  run({creatureId, userId}) {
+    assertOwnership(creatureId, this.userId);
+
+    let tier = getUserTier(userId);
+    let currentCharacterCount = Creatures.find({
+      owner: userId,
+    }, {
+      fields: {_id: 1},
+    }).count();
+
+    if (
+      tier.characterSlots !== -1 &&
+      currentCharacterCount >= tier.characterSlots
+    ){
+      throw new Meteor.Error('Creatures.methods.transferOwnership.denied',
+      'The new owner is already at their character limit')
+    }
+
+    Creatures.update(creatureId, {
+      $set: {owner: userId},
+    });
+
+		return creatureId;
+  },
+});
+
+export default transferCreatureOwnership;