implements pattern for graphql

src/graphql/init.js

@@ -0,0 +1,43 @@
+const graphQLHTTP = require('express-graphql');
+const { GraphQLObjectType, GraphQLString, GraphQLSchema } = require('graphql');
+
+const queryType = {
+  name: 'Query',
+  fields: {},
+};
+
+function init() {
+  const userType = new GraphQLObjectType({
+    name: 'User',
+    fields: {
+      id: { type: GraphQLString },
+      email: { type: GraphQLString },
+    },
+  });
+
+  queryType.fields.user = {
+    type: userType,
+    args: {
+      id: { type: GraphQLString },
+    },
+    resolve: (_, { id }) => {
+      return {
+        id,
+        email: 'test',
+      };
+    },
+  };
+
+  const query = new GraphQLObjectType(queryType);
+  const schema = new GraphQLSchema({ query });
+
+  return graphQLHTTP({
+    schema,
+    graphiql: true,
+    context: ({ req }) => ({
+      user: req.user,
+    }),
+  });
+}
+
+module.exports = init;