feat: Load GraphQL modules and return an executable schema!

Author: nprail

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.eslintrc.json

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+{
+    "extends": "standard"
+}

.gitignore

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.travis.yml

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+language: node_js
+node_js:
+  - "node"
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+    - ~/.npm
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LICENSE

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+MIT License
+
+Copyright (c) 2019 eventOne, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# GraphQL Module Loader
+
+## Usage
+
+```javascript
+const { moduleLoader } = require('gql-module-loader')
+const { ApolloServer } = require('apollo-server-express')
+
+const Root = {
+  schema: {
+    typeDefs: gql``,
+    resolvers: {}
+  }
+}
+const Auth = {
+  schema: {
+    typeDefs: gql``,
+    resolvers: {}
+  }
+}
+
+const { schema, rawSchema } = moduleLoader([Root, Auth])
+
+const server = new ApolloServer({
+  schema
+})
+```

lib/index.js

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+const { makeExecutableSchema } = require('graphql-tools')
+
+/**
+ * Loads GraphQL modules
+ * @exports moduleLoader
+ * @param {Array} modules Modules to import
+ *
+ * @module gql-module-loader
+ * @returns {object} Loaded GraphQL schema
+ *
+ * @example
+ * const { moduleLoader } = require('gql-module-loader')
+ * const { schema, rawSchema } = moduleLoader([Root, Auth])
+ */
+const moduleLoader = modules => {
+  const typeDefs = []
+  let resolvers = {}
+  for (const mod of modules) {
+    // import GraphQL schemas
+    if (mod.schema) {
+      // merge type defs
+      if (mod.schema.typeDefs.constructor === Array) {
+        typeDefs.push(...mod.schema.typeDefs)
+      } else {
+        typeDefs.push(mod.schema.typeDefs)
+      }
+
+      // merge resolvers
+      resolvers = { ...resolvers, ...mod.schema.resolvers }
+    }
+  }
+
+  const rawSchema = {
+    typeDefs,
+    resolvers
+  }
+  const schema = makeExecutableSchema(rawSchema)
+
+  return { schema, rawSchema }
+}
+
+module.exports = { moduleLoader }