refactor: migrate codebase on typescript

BREAKING CHANGE: removed flowtype definitions; min supported nodejs version is 8

.eslintignore

@@ -1,3 +1,2 @@
-flow-typed
 lib
-mjs
+.eslintrc.js

.eslintrc.js

@@ -0,0 +1,54 @@
+const path = require('path');
+
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint', 'prettier'],
+  extends: [
+    'plugin:@typescript-eslint/recommended',
+    'prettier/@typescript-eslint',
+    'plugin:prettier/recommended',
+  ],
+  parserOptions: {
+    sourceType: 'module',
+    useJSXTextNode: true,
+    project: [
+      path.resolve(__dirname, 'tsconfig.json'),
+      path.resolve(__dirname, 'examples/tsconfig.json'),
+    ],
+  },
+  rules: {
+    'no-underscore-dangle': 0,
+    'arrow-body-style': 0,
+    'no-unused-expressions': 0,
+    'no-plusplus': 0,
+    'no-console': 0,
+    'func-names': 0,
+    'comma-dangle': [
+      'error',
+      {
+        arrays: 'always-multiline',
+        objects: 'always-multiline',
+        imports: 'always-multiline',
+        exports: 'always-multiline',
+        functions: 'ignore',
+      },
+    ],
+    'no-prototype-builtins': 0,
+    'prefer-destructuring': 0,
+    'no-else-return': 0,
+    'lines-between-class-members': ['error', 'always', { exceptAfterSingleLine: true }],
+    '@typescript-eslint/explicit-member-accessibility': 0,
+    '@typescript-eslint/no-explicit-any': 0,
+    '@typescript-eslint/no-inferrable-types': 0,
+    '@typescript-eslint/explicit-function-return-type': 0,
+    '@typescript-eslint/no-use-before-define': 0,
+    '@typescript-eslint/no-empty-function': 0,
+    '@typescript-eslint/camelcase': 0,
+    '@typescript-eslint/ban-ts-comment': 0,
+    '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+  },
+  env: {
+    jasmine: true,
+    jest: true,
+  },
+};

.travis.yml

@@ -9,6 +9,7 @@ notifications:
 node_js:
   - "10"
   - "12"
+  - "14"
 script:
   - yarn run test
   - yarn run build

examples/partialApi/index.js → examples/fullApi/index.ts

@@ -1,6 +1,3 @@
-/* @flow */
-/* eslint-disable no-console */
-
 import express from 'express';
 import graphqlHTTP from 'express-graphql';
 import schema from './schema';
@@ -10,14 +7,14 @@ const expressPort = process.env.port || process.env.PORT || 4000;
 const server = express();
 server.use(
   '/',
-  (graphqlHTTP({
-    schema: (schema: any),
+  graphqlHTTP({
+    schema,
     graphiql: true,
-    formatError: error => ({
+    customFormatErrorFn: (error) => ({
       message: error.message,
-      stack: error.stack.split('\n'),
+      stack: error?.stack?.split('\n'),
     }),
-  }): any)
+  })
 );
 
 server.listen(expressPort, () => {

examples/fullApi/schema.js → examples/fullApi/schema.ts

@@ -1,5 +1,3 @@
-/* @flow */
-
 import { GraphQLSchema, GraphQLObjectType } from 'graphql';
 import awsSDK from 'aws-sdk';
 import { AwsApiParser } from '../../src'; // from 'graphql-compose-aws';

examples/introspection/generate.js → examples/introspection/generate.ts

@@ -1,5 +1,3 @@
-/* @flow */
-
 import fs from 'fs';
 import path from 'path';
 import { printSchema } from 'graphql';

examples/fullApi/index.js → examples/partialApi/index.ts

@@ -1,6 +1,3 @@
-/* @flow */
-/* eslint-disable no-console */
-
 import express from 'express';
 import graphqlHTTP from 'express-graphql';
 import schema from './schema';
@@ -10,14 +7,14 @@ const expressPort = process.env.port || process.env.PORT || 4000;
 const server = express();
 server.use(
   '/',
-  (graphqlHTTP({
-    schema: (schema: any),
+  graphqlHTTP({
+    schema,
     graphiql: true,
-    formatError: error => ({
+    customFormatErrorFn: (error) => ({
       message: error.message,
-      stack: error.stack.split('\n'),
+      stack: error?.stack?.split('\n'),
     }),
-  }): any)
+  })
 );
 
 server.listen(expressPort, () => {

examples/partialApi/schema.js → examples/partialApi/schema.ts

@@ -1,5 +1,3 @@
-/* @flow */
-
 import { GraphQLSchema, GraphQLObjectType } from 'graphql';
 import awsSDK from 'aws-sdk';
 import { AwsApiParser } from '../../src'; // from 'graphql-compose-aws';

examples/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    "target": "es2016",
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true,
+    "removeComments": true,
+    "resolveJsonModule": true,
+    "strict": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["es2017", "esnext.asynciterable"],
+    "types": ["node", "jest"],
+    "baseUrl": ".",
+    "paths": {
+      "*" : ["types/*"]
+    },
+    "rootDir": "../",
+  },
+  "include": ["./**/*"],
+  "exclude": [
+    "node_modules"
+  ]
+}