Replaced default height and weight fields with fields taking units argument.

src/web/plugins/actors.js

@@ -0,0 +1,48 @@
+'use strict';
+
+const { makeExtendSchemaPlugin, gql } = require('graphile-utils');
+const moment = require('moment');
+const { cmToFeetInches, kgToLbs } = require('../../utils/convert');
+
+const schemaExtender = makeExtendSchemaPlugin(_build => ({
+    typeDefs: gql`
+        enum Units {
+            METRIC
+            IMPERIAL
+        }
+
+      extend type Actor {
+        age: Int @requires(columns: ["birthdate"])
+        height(units:Units): String @requires(columns: ["height"])
+        weight(units:Units): String @requires(columns: ["weight"])
+      }
+    `,
+    resolvers: {
+        Actor: {
+            age(parent, _args, _context, _info) {
+                if (!parent.birthdate) return null;
+
+                return moment().diff(parent.birthdate, 'years');
+            },
+            height(parent, args, _context, _info) {
+                if (!parent.height) return null;
+
+                if (args.units === 'IMPERIAL') {
+                    const { feet, inches } = cmToFeetInches(parent.height);
+                    return `${feet}' ${inches}"`;
+                }
+
+                return parent.height.toString();
+            },
+            weight(parent, args, _context, _info) {
+                if (!parent.weight) return null;
+
+                return args.units === 'IMPERIAL'
+                    ? kgToLbs(parent.weight).toString()
+                    : parent.weight.toString();
+            },
+        },
+    },
+}));
+
+module.exports = [schemaExtender];

src/web/plugins/plugins.js

@@ -0,0 +1,7 @@
+'use strict';
+
+const ActorPlugins = require('./actors');
+
+module.exports = {
+    ActorPlugins,
+};

src/web/server.js

@@ -10,6 +10,8 @@ const bodyParser = require('body-parser');
 const ConnectionFilterPlugin = require('postgraphile-plugin-connection-filter');
 const PgSimplifyInflectorPlugin = require('@graphile-contrib/pg-simplify-inflector');
 
+const { ActorPlugins } = require('./plugins/plugins');
+
 const {
     fetchReleases,
     fetchReleaseById,
@@ -47,7 +49,10 @@ function initServer() {
             graphileBuildOptions: {
                 pgOmitListSuffix: true,
             },
-            appendPlugins: [PgSimplifyInflectorPlugin, ConnectionFilterPlugin],
+            appendPlugins: [
+                PgSimplifyInflectorPlugin, ConnectionFilterPlugin,
+                ...ActorPlugins,
+            ],
         },
     ));