From b03f7413cc4740b05333ef49dfcf3e9a12fd5c44 Mon Sep 17 00:00:00 2001
From: Kacper Wiszczuk <kacperwiszczuk@gmail.com>
Date: Fri, 17 May 2019 22:32:54 +0200
Subject: [PATCH] chore: migrate `tools` to TypeScript (#296)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Migrate tools package to Typescript

* Prebuild ts

* Improve yarn build-clean

* Remove unnecessary statements

* Fix linting

* Fix eslint

* Update packages/tools/src/isPackagerRunning.ts

Co-Authored-By: Michał Pierzchała <thymikee@gmail.com>

* adjust package.json

* add vscode helper settings

* remove dead node-fetch references
---
 .eslintrc.js                                  |   4 +-
 .gitignore                                    |   1 +
 .vscode/extensions.json                       |  10 +
 .vscode/settings.json                         |  24 +++
 babel.config.js                               |  11 +-
 jest.config.js                                |   2 +-
 package.json                                  |  15 +-
 packages/cli/package.json                     |   1 -
 packages/platform-android/package.json        |   1 -
 packages/tools/package.json                   |   8 +-
 .../src/__mocks__/{logger.js => logger.ts}    |   1 -
 ...yType-test.js => groupFilesByType.test.ts} |   2 -
 packages/tools/src/{errors.js => errors.ts}   |   3 +-
 ...rTerminal.js => getDefaultUserTerminal.ts} |   2 +-
 ...roupFilesByType.js => groupFilesByType.ts} |  13 +-
 packages/tools/src/{index.js => index.ts}     |   3 -
 ...ackagerRunning.js => isPackagerRunning.ts} |  19 +-
 packages/tools/src/{logger.js => logger.ts}   |   3 -
 packages/tools/tsconfig.json                  |   7 +
 scripts/build.js                              |  31 ++-
 scripts/buildTs.js                            |  47 +++++
 scripts/helpers.js                            |  27 +++
 tsconfig.json                                 |  25 +++
 yarn.lock                                     | 177 +++++++++++++++++-
 24 files changed, 367 insertions(+), 70 deletions(-)
 create mode 100644 .vscode/extensions.json
 create mode 100644 .vscode/settings.json
 rename packages/tools/src/__mocks__/{logger.js => logger.ts} (96%)
 rename packages/tools/src/__tests__/{groupFilesByType-test.js => groupFilesByType.test.ts} (92%)
 rename packages/tools/src/{errors.js => errors.ts} (93%)
 rename packages/tools/src/{getDefaultUserTerminal.js => getDefaultUserTerminal.ts} (63%)
 rename packages/tools/src/{groupFilesByType.js => groupFilesByType.ts} (69%)
 rename packages/tools/src/{index.js => index.ts} (94%)
 rename packages/tools/src/{isPackagerRunning.js => isPackagerRunning.ts} (72%)
 rename packages/tools/src/{logger.js => logger.ts} (98%)
 create mode 100644 packages/tools/tsconfig.json
 create mode 100644 scripts/buildTs.js
 create mode 100644 tsconfig.json

diff --git a/.eslintrc.js b/.eslintrc.js
index 602287973..494825ac6 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -7,7 +7,7 @@ module.exports = {
     'prettier/prettier': [2, 'fb'],
   },
   // @todo: remove once we cover whole codebase with types
-  plugins: ['eslint-plugin-import'],
+  plugins: ['import'],
   settings: {
     react: {
       version: 'latest',
@@ -16,6 +16,8 @@ module.exports = {
       alias: {
         map: [['types', './types/index.js']],
       },
+      // Use <rootDir>/tsconfig.json for typescript resolution
+      typescript: {},
     },
   },
   overrides: [
diff --git a/.gitignore b/.gitignore
index a0031dbb3..71440e6ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ package-lock.json
 build/
 .eslintcache
 !packages/cli/src/commands/init/__fixtures__/editTemplate/node_modules
+*.tsbuildinfo
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 000000000..961c02482
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,10 @@
+{
+  // See http://go.microsoft.com/fwlink/?LinkId=827846
+  // for the documentation about the extensions.json format
+  "recommendations": [
+    "dbaeumer.vscode-eslint",
+    "redhat.vscode-yaml",
+    "flowtype.flow-for-vscode",
+    "esbenp.prettier-vscode"
+  ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..029ba7597
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,24 @@
+{
+  "editor.rulers": [80],
+  "files.exclude": {
+    "**/.git": true,
+    "**/node_modules": true,
+    "**/build": true
+  },
+  "editor.formatOnSave": true,
+  "flow.useNPMPackagedFlow": true,
+  "javascript.validate.enable": false,
+  "prettier.eslintIntegration": true,
+  "eslint.validate": [
+    "javascript",
+    "javascriptreact",
+    {
+      "language": "typescript",
+      "autoFix": true
+    },
+    {
+      "language": "typescriptreact",
+      "autoFix": true
+    }
+  ]
+}
diff --git a/babel.config.js b/babel.config.js
index bf19c198a..f7a77eb48 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,5 +1,15 @@
 module.exports = {
   babelrcRoots: ['packages/*'],
+  overrides: [
+    {
+      presets: ['@babel/preset-flow'],
+      test: '**/*.js',
+    },
+    {
+      presets: ['@babel/preset-typescript'],
+      test: '**/*.ts',
+    },
+  ],
   presets: [
     [
       require.resolve('@babel/preset-env'),
@@ -8,7 +18,6 @@ module.exports = {
         useBuiltIns: 'entry',
       },
     ],
-    require.resolve('@babel/preset-flow'),
   ],
   plugins: [
     require.resolve('@babel/plugin-transform-strict-mode'),
diff --git a/jest.config.js b/jest.config.js
index eb479491c..e98503396 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -12,7 +12,7 @@ module.exports = {
       ...common,
       displayName: 'unit',
       setupFiles: ['<rootDir>/jest/setupUnitTests.js'],
-      testMatch: ['<rootDir>/**/__tests__/*{.,-}test.js'],
+      testMatch: ['<rootDir>/**/__tests__/*{.,-}test.[jt]s'],
     },
   ],
 };
diff --git a/package.json b/package.json
index 4993f4365..b698bf2c2 100644
--- a/package.json
+++ b/package.json
@@ -4,14 +4,16 @@
     "packages/*"
   ],
   "scripts": {
+    "prebuild": "yarn build:ts",
     "build": "node ./scripts/build.js",
-    "build-clean": "rm -rf ./packages/*/build",
+    "build:ts": "node ./scripts/buildTs.js",
+    "build-clean": "rm -rf ./packages/*/build ./packages/*/tsconfig.tsbuildinfo",
     "watch": "node ./scripts/watch.js",
     "test": "jest",
     "test:ci:unit": "jest packages --ci --coverage",
     "test:ci:e2e": "jest e2e --ci -i",
+    "lint": "eslint --ext .js,.ts . --cache --report-unused-disable-directives",
     "test:ci:cocoapods": "ruby packages/platform-ios/native_modules.rb",
-    "lint": "eslint . --cache --report-unused-disable-directives",
     "flow-check": "flow check",
     "postinstall": "yarn build",
     "publish": "yarn build-clean && yarn build && lerna publish"
@@ -22,12 +24,16 @@
     "@babel/plugin-transform-strict-mode": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-flow": "^7.0.0",
-    "@react-native-community/eslint-config": "^0.0.3",
+    "@babel/preset-typescript": "^7.3.3",
+    "@react-native-community/eslint-config": "^0.0.5",
+    "@types/jest": "^24.0.11",
+    "@types/node": "^11.13.0",
     "babel-jest": "^24.6.0",
     "babel-plugin-module-resolver": "^3.2.0",
     "chalk": "^2.4.2",
     "eslint": "^5.10.0",
     "eslint-import-resolver-alias": "^1.1.2",
+    "eslint-import-resolver-typescript": "^1.1.1",
     "eslint-plugin-import": "^2.17.0",
     "execa": "^1.0.0",
     "flow-bin": "^0.97.0",
@@ -38,6 +44,7 @@
     "metro-memory-fs": "^0.53.1",
     "micromatch": "^3.1.10",
     "mkdirp": "^0.5.1",
-    "string-length": "^2.0.0"
+    "string-length": "^2.0.0",
+    "typescript": "^3.4.5"
   }
 }
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 258cdb597..21c27e401 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -49,7 +49,6 @@
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",
     "morgan": "^1.9.0",
-    "node-fetch": "^2.2.0",
     "node-notifier": "^5.2.1",
     "open": "^6.2.0",
     "ora": "^3.4.0",
diff --git a/packages/platform-android/package.json b/packages/platform-android/package.json
index 06b977ff5..038c318c2 100644
--- a/packages/platform-android/package.json
+++ b/packages/platform-android/package.json
@@ -5,7 +5,6 @@
   "dependencies": {
     "@react-native-community/cli-tools": "^2.0.0-alpha.20",
     "logkitty": "^0.4.0",
-    "node-fetch": "^2.2.0",
     "slash": "^2.0.0",
     "xmldoc": "^0.4.0"
   },
diff --git a/packages/tools/package.json b/packages/tools/package.json
index 8bf2aace3..df57dd382 100644
--- a/packages/tools/package.json
+++ b/packages/tools/package.json
@@ -5,7 +5,13 @@
   "dependencies": {
     "chalk": "^1.1.1",
     "lodash": "^4.17.5",
-    "mime": "^1.3.4"
+    "mime": "^2.4.1",
+    "node-fetch": "^2.5.0"
+  },
+  "devDependencies": {
+    "@types/lodash": "^4.14.123",
+    "@types/mime": "^2.0.1",
+    "@types/node-fetch": "^2.3.3"
   },
   "files": [
     "build"
diff --git a/packages/tools/src/__mocks__/logger.js b/packages/tools/src/__mocks__/logger.ts
similarity index 96%
rename from packages/tools/src/__mocks__/logger.js
rename to packages/tools/src/__mocks__/logger.ts
index 33dbe25a2..8cc725657 100644
--- a/packages/tools/src/__mocks__/logger.js
+++ b/packages/tools/src/__mocks__/logger.ts
@@ -4,7 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
  */
 
 module.exports.out = () => jest.fn();
diff --git a/packages/tools/src/__tests__/groupFilesByType-test.js b/packages/tools/src/__tests__/groupFilesByType.test.ts
similarity index 92%
rename from packages/tools/src/__tests__/groupFilesByType-test.js
rename to packages/tools/src/__tests__/groupFilesByType.test.ts
index 17f02ed59..e15a985cc 100644
--- a/packages/tools/src/__tests__/groupFilesByType-test.js
+++ b/packages/tools/src/__tests__/groupFilesByType.test.ts
@@ -4,8 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
- * @emails oncall+javascript_foundation
  */
 
 import groupFilesByType from '../groupFilesByType';
diff --git a/packages/tools/src/errors.js b/packages/tools/src/errors.ts
similarity index 93%
rename from packages/tools/src/errors.js
rename to packages/tools/src/errors.ts
index 6cb5de299..5c59f26b3 100644
--- a/packages/tools/src/errors.js
+++ b/packages/tools/src/errors.ts
@@ -16,7 +16,8 @@ export class CLIError extends Error {
       this.stack =
         typeof originError === 'string'
           ? originError
-          : originError.stack
+          : originError.stack ||
+            ''
               .split('\n')
               .slice(0, 2)
               .join('\n');
diff --git a/packages/tools/src/getDefaultUserTerminal.js b/packages/tools/src/getDefaultUserTerminal.ts
similarity index 63%
rename from packages/tools/src/getDefaultUserTerminal.js
rename to packages/tools/src/getDefaultUserTerminal.ts
index 48550b61b..a5bf91914 100644
--- a/packages/tools/src/getDefaultUserTerminal.js
+++ b/packages/tools/src/getDefaultUserTerminal.ts
@@ -1,4 +1,4 @@
-const getDefaultUserTerminal = (): ?string =>
+const getDefaultUserTerminal = (): string | undefined =>
   process.env.REACT_TERMINAL || process.env.TERM_PROGRAM;
 
 export default getDefaultUserTerminal;
diff --git a/packages/tools/src/groupFilesByType.js b/packages/tools/src/groupFilesByType.ts
similarity index 69%
rename from packages/tools/src/groupFilesByType.js
rename to packages/tools/src/groupFilesByType.ts
index cc9a723e8..c42215252 100644
--- a/packages/tools/src/groupFilesByType.js
+++ b/packages/tools/src/groupFilesByType.ts
@@ -4,22 +4,11 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
  */
 
 import {groupBy} from 'lodash';
 import mime from 'mime';
 
-/**
- * Since there are no officially registered MIME types
- * for ttf/otf yet http://www.iana.org/assignments/media-types/media-types.xhtml,
- * we define two non-standard ones for the sake of parsing
- */
-mime.define({
-  'font/opentype': ['otf'],
-  'font/truetype': ['ttf'],
-});
-
 /**
  * Given an array of files, it groups it by it's type.
  * Type of the file is inferred from it's mimetype based on the extension
@@ -32,5 +21,5 @@ mime.define({
  * the returned object will be: {font: ['fonts/a.ttf'], image: ['images/b.jpg']}
  */
 export default function groupFilesByType(assets: Array<string>) {
-  return groupBy(assets, type => mime.lookup(type).split('/')[0]);
+  return groupBy(assets, type => (mime.getType(type) || '').split('/')[0]);
 }
diff --git a/packages/tools/src/index.js b/packages/tools/src/index.ts
similarity index 94%
rename from packages/tools/src/index.js
rename to packages/tools/src/index.ts
index 08c20616d..d99e20bf0 100644
--- a/packages/tools/src/index.js
+++ b/packages/tools/src/index.ts
@@ -1,6 +1,3 @@
-/**
- * @flow
- */
 export {default as logger} from './logger';
 export {default as groupFilesByType} from './groupFilesByType';
 export {default as isPackagerRunning} from './isPackagerRunning';
diff --git a/packages/tools/src/isPackagerRunning.js b/packages/tools/src/isPackagerRunning.ts
similarity index 72%
rename from packages/tools/src/isPackagerRunning.js
rename to packages/tools/src/isPackagerRunning.ts
index 393fdf817..ff9273346 100644
--- a/packages/tools/src/isPackagerRunning.js
+++ b/packages/tools/src/isPackagerRunning.ts
@@ -16,18 +16,17 @@ import fetch from 'node-fetch';
  *   - `not_running`: the packager nor any process is running on the expected port.
  *   - `unrecognized`: one other process is running on the port we expect the packager to be running.
  */
-function isPackagerRunning(
+async function isPackagerRunning(
   packagerPort: string = process.env.RCT_METRO_PORT || '8081',
 ): Promise<'running' | 'not_running' | 'unrecognized'> {
-  return fetch(`http://localhost:${packagerPort}/status`).then(
-    res =>
-      res
-        .text()
-        .then(body =>
-          body === 'packager-status:running' ? 'running' : 'unrecognized',
-        ),
-    () => 'not_running',
-  );
+  try {
+    const result = await fetch(`http://localhost:${packagerPort}/status`);
+    const body = await result.text();
+
+    return body === 'packager-status:running' ? 'running' : 'unrecognized';
+  } catch (_error) {
+    return 'not_running';
+  }
 }
 
 export default isPackagerRunning;
diff --git a/packages/tools/src/logger.js b/packages/tools/src/logger.ts
similarity index 98%
rename from packages/tools/src/logger.js
rename to packages/tools/src/logger.ts
index 8bb9cbddd..77cc37138 100644
--- a/packages/tools/src/logger.js
+++ b/packages/tools/src/logger.ts
@@ -1,6 +1,3 @@
-/**
- * @flow
- */
 import chalk from 'chalk';
 
 const SEPARATOR = ', ';
diff --git a/packages/tools/tsconfig.json b/packages/tools/tsconfig.json
new file mode 100644
index 000000000..7bb06bce6
--- /dev/null
+++ b/packages/tools/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "build"
+  }
+}
diff --git a/scripts/build.js b/scripts/build.js
index cceda31af..b0c10568d 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -25,31 +25,21 @@ const mkdirp = require('mkdirp');
 const babel = require('@babel/core');
 const chalk = require('chalk');
 const micromatch = require('micromatch');
-const stringLength = require('string-length');
-const {PACKAGES_DIR, getPackages} = require('./helpers');
+const {
+  PACKAGES_DIR,
+  getPackages,
+  OK,
+  adjustToTerminalWidth,
+} = require('./helpers');
 
-const OK = chalk.reset.inverse.bold.green(' DONE ');
 const SRC_DIR = 'src';
 const BUILD_DIR = 'build';
 const JS_FILES_PATTERN = '**/*.js';
+const TS_FILE_PATTERN = '**/*.ts';
 const IGNORE_PATTERN = '**/__{tests,mocks,fixtures}__/**';
 
 const transformOptions = require('../babel.config.js');
 
-const adjustToTerminalWidth = str => {
-  const columns = process.stdout.columns || 80;
-  const WIDTH = columns - stringLength(OK) + 1;
-  const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
-  let lastString = strs[strs.length - 1];
-  if (lastString.length < WIDTH) {
-    lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
-  }
-  return strs
-    .slice(0, -1)
-    .concat(lastString)
-    .join('\n');
-};
-
 function getPackageName(file) {
   return path.relative(PACKAGES_DIR, file).split(path.sep)[0];
 }
@@ -59,7 +49,7 @@ function getBuildPath(file, buildFolder) {
   const pkgSrcPath = path.resolve(PACKAGES_DIR, pkgName, SRC_DIR);
   const pkgBuildPath = path.resolve(PACKAGES_DIR, pkgName, buildFolder);
   const relativeToSrcPath = path.relative(pkgSrcPath, file);
-  return path.resolve(pkgBuildPath, relativeToSrcPath);
+  return path.resolve(pkgBuildPath, relativeToSrcPath).replace(/\.ts$/, '.js');
 }
 
 function buildNodePackage(p) {
@@ -89,7 +79,10 @@ function buildFile(file, silent) {
 
   mkdirp.sync(path.dirname(destPath), '777');
 
-  if (!micromatch.isMatch(file, JS_FILES_PATTERN)) {
+  if (
+    !micromatch.isMatch(file, JS_FILES_PATTERN) &&
+    !micromatch.isMatch(file, TS_FILE_PATTERN)
+  ) {
     fs.createReadStream(file).pipe(fs.createWriteStream(destPath));
     silent ||
       process.stdout.write(
diff --git a/scripts/buildTs.js b/scripts/buildTs.js
new file mode 100644
index 000000000..5ab6c6c8f
--- /dev/null
+++ b/scripts/buildTs.js
@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const chalk = require('chalk');
+const execa = require('execa');
+const {getPackages, adjustToTerminalWidth, OK} = require('./helpers');
+
+const packages = getPackages();
+
+const packagesWithTs = packages.filter(p =>
+  fs.existsSync(path.resolve(p, 'tsconfig.json')),
+);
+
+const args = [
+  path.resolve(
+    require.resolve('typescript/package.json'),
+    '..',
+    require('typescript/package.json').bin.tsc,
+  ),
+  '-b',
+  ...packagesWithTs,
+  ...process.argv.slice(2),
+];
+
+console.log(chalk.inverse('Building TypeScript definition files'));
+process.stdout.write(adjustToTerminalWidth('Building\n'));
+
+try {
+  execa.sync('node', args, {stdio: 'inherit'});
+  process.stdout.write(`${OK}\n`);
+} catch (e) {
+  process.stdout.write('\n');
+  console.error(
+    chalk.inverse.red('Unable to build TypeScript definition files'),
+  );
+  console.error(e.stack);
+  process.exitCode = 1;
+}
diff --git a/scripts/helpers.js b/scripts/helpers.js
index 3dfdf7f3c..97c108ba1 100644
--- a/scripts/helpers.js
+++ b/scripts/helpers.js
@@ -1,8 +1,19 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const fs = require('fs');
 const path = require('path');
+const chalk = require('chalk');
+const stringLength = require('string-length');
 
 const PACKAGES_DIR = path.resolve(__dirname, '../packages');
 
+const OK = chalk.reset.inverse.bold.green(' DONE ');
+
 function getPackages() {
   return fs
     .readdirSync(PACKAGES_DIR)
@@ -10,7 +21,23 @@ function getPackages() {
     .filter(f => fs.lstatSync(path.resolve(f)).isDirectory());
 }
 
+function adjustToTerminalWidth(str) {
+  const columns = process.stdout.columns || 80;
+  const WIDTH = columns - stringLength(OK) + 1;
+  const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
+  let lastString = strs[strs.length - 1];
+  if (lastString.length < WIDTH) {
+    lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
+  }
+  return strs
+    .slice(0, -1)
+    .concat(lastString)
+    .join('\n');
+}
+
 module.exports = {
   getPackages,
   PACKAGES_DIR,
+  adjustToTerminalWidth,
+  OK,
 };
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 000000000..bc0c60880
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "target": "es2017",
+    "module": "commonjs",
+    "lib": ["es2017"],
+    "declaration": true,
+    "declarationMap": true,
+    "composite": true,
+    "emitDeclarationOnly": true,
+
+    "strict": true,
+
+    /* Additional Checks */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+
+    /* Module Resolution Options */
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "resolveJsonModule": true
+  },
+  "exclude": ["**/__tests__/**/*", "**/build/**/*"]
+}
diff --git a/yarn.lock b/yarn.lock
index 42ac30ffd..a72c5c0fb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -430,6 +430,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-syntax-typescript@^7.2.0":
+  version "7.3.3"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-typescript/-/plugin-syntax-typescript-7.3.3.tgz#a7cc3f66119a9f7ebe2de5383cce193473d65991"
+  integrity sha512-dGwbSMA1YhVS8+31CnPR7LB4pcbrzcV99wQzby4uAfrkZPYZlQ7ImwdpzLqi6Z6IL02b8IAL379CaMwo0x5Lag==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+
 "@babel/plugin-transform-arrow-functions@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-arrow-functions/-/plugin-transform-arrow-functions-7.0.0.tgz#a6c14875848c68a3b4b3163a486535ef25c7e749"
@@ -831,6 +838,14 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-typescript" "^7.0.0"
 
+"@babel/plugin-transform-typescript@^7.3.2":
+  version "7.4.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typescript/-/plugin-transform-typescript-7.4.0.tgz#0389ec53a34e80f99f708c4ca311181449a68eb1"
+  integrity sha512-U7/+zKnRZg04ggM/Bm+xmu2B/PrwyDQTT/V89FXWYWNMxBDwSx56u6jtk9SEbfLFbZaEI72L+5LPvQjeZgFCrQ==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-syntax-typescript" "^7.2.0"
+
 "@babel/plugin-transform-unicode-regex@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.0.0.tgz#c6780e5b1863a76fe792d90eded9fcd5b51d68fc"
@@ -902,6 +917,14 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-transform-flow-strip-types" "^7.0.0"
 
+"@babel/preset-typescript@^7.3.3":
+  version "7.3.3"
+  resolved "https://registry.yarnpkg.com/@babel/preset-typescript/-/preset-typescript-7.3.3.tgz#88669911053fa16b2b276ea2ede2ca603b3f307a"
+  integrity sha512-mzMVuIP4lqtn4du2ynEfdO0+RYcslwrZiJHXu4MGaC1ctJiW2fyaeDrtjJGs7R/KebZ1sgowcIoWf4uRpEfKEg==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-transform-typescript" "^7.3.2"
+
 "@babel/register@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.0.0.tgz#fa634bae1bfa429f60615b754fc1f1d745edd827"
@@ -1863,11 +1886,13 @@
     universal-user-agent "^2.0.0"
     url-template "^2.0.8"
 
-"@react-native-community/eslint-config@^0.0.3":
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/@react-native-community/eslint-config/-/eslint-config-0.0.3.tgz#bf9be8434caa18f85b570cf4e28366f2a7f1ea91"
-  integrity sha512-YmCiqoiqgSW8YpWYWLwG4WYwVIwvkhfH97COxbin71CuCr5muZPlmhHOFwo2gIQzUvt1ewFb1shtUi1X8TAVhA==
+"@react-native-community/eslint-config@^0.0.5":
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/@react-native-community/eslint-config/-/eslint-config-0.0.5.tgz#584f6493258202a57efc22e7be66966e43832795"
+  integrity sha512-jwO2tnKaTPTLX5XYXMHGEnFdf543SU7jz98/OF5mDH3b7lP+BOaCD+jVfqqHoDRkcqyPlYiR1CgwVGWpi0vMWg==
   dependencies:
+    "@typescript-eslint/eslint-plugin" "^1.5.0"
+    "@typescript-eslint/parser" "^1.5.0"
     babel-eslint "10.0.1"
     eslint-plugin-eslint-comments "^3.1.1"
     eslint-plugin-flowtype "2.50.3"
@@ -1916,6 +1941,50 @@
   resolved "https://registry.yarnpkg.com/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.0.tgz#1eb8c033e98cf4e1a4cedcaf8bcafe8cb7591e85"
   integrity sha512-eAtOAFZefEnfJiRFQBGw1eYqa5GTLCZ1y86N0XSI/D6EB+E8z6VPV/UL7Gi5UEclFqoQk+6NRqEDsfmDLXn8sg==
 
+"@types/jest-diff@*":
+  version "20.0.1"
+  resolved "https://registry.yarnpkg.com/@types/jest-diff/-/jest-diff-20.0.1.tgz#35cc15b9c4f30a18ef21852e255fdb02f6d59b89"
+  integrity sha512-yALhelO3i0hqZwhjtcr6dYyaLoCHbAMshwtj6cGxTvHZAKXHsYGdff6E8EPw3xLKY0ELUTQ69Q1rQiJENnccMA==
+
+"@types/jest@^24.0.11":
+  version "24.0.11"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-24.0.11.tgz#1f099bea332c228ea6505a88159bfa86a5858340"
+  integrity sha512-2kLuPC5FDnWIDvaJBzsGTBQaBbnDweznicvK7UGYzlIJP4RJR2a4A/ByLUXEyEgag6jz8eHdlWExGDtH3EYUXQ==
+  dependencies:
+    "@types/jest-diff" "*"
+
+"@types/json5@^0.0.29":
+  version "0.0.29"
+  resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
+  integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
+
+"@types/lodash@^4.14.123":
+  version "4.14.123"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.123.tgz#39be5d211478c8dd3bdae98ee75bb7efe4abfe4d"
+  integrity sha512-pQvPkc4Nltyx7G1Ww45OjVqUsJP4UsZm+GWJpigXgkikZqJgRm4c48g027o6tdgubWHwFRF15iFd+Y4Pmqv6+Q==
+
+"@types/mime@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
+  integrity sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==
+
+"@types/node-fetch@^2.3.3":
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.3.3.tgz#eb9c2a0ce8e9424ebe0c0cbe6f1e8ea7576c1310"
+  integrity sha512-MIplfRxrDTsIbOLGyFqNWTmxho5Fs710Kul35tEcaqkx9He86mGbSCDvILL0LCMfmm+oJ8tDg51crE9+pJGgiQ==
+  dependencies:
+    "@types/node" "*"
+
+"@types/node@*":
+  version "12.0.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.0.tgz#d11813b9c0ff8aaca29f04cbc12817f4c7d656e5"
+  integrity sha512-Jrb/x3HT4PTJp6a4avhmJCDEVrPdqLfl3e8GGMbpkGGdwAV5UGlIs4vVEfsHHfylZVOKZWpOqmqFH8CbfOZ6kg==
+
+"@types/node@^11.13.0":
+  version "11.13.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-11.13.0.tgz#b0df8d6ef9b5001b2be3a94d909ce3c29a80f9e1"
+  integrity sha512-rx29MMkRdVmzunmiA4lzBYJNnXsW/PhG4kMBy2ATsYaDjGGR75dCFEVVROKpNwlVdcUX3xxlghKQOeDPBJobng==
+
 "@types/stack-utils@^1.0.1":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@types/stack-utils/-/stack-utils-1.0.1.tgz#0a851d3bd96498fa25c33ab7278ed3bd65f06c3e"
@@ -1926,6 +1995,33 @@
   resolved "https://registry.yarnpkg.com/@types/yargs/-/yargs-12.0.12.tgz#45dd1d0638e8c8f153e87d296907659296873916"
   integrity sha512-SOhuU4wNBxhhTHxYaiG5NY4HBhDIDnJF60GU+2LqHAdKKer86//e4yg69aENCtQ04n0ovz+tq2YPME5t5yp4pw==
 
+"@typescript-eslint/eslint-plugin@^1.5.0":
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-1.6.0.tgz#a5ff3128c692393fb16efa403ec7c8a5593dab0f"
+  integrity sha512-U224c29E2lo861TQZs6GSmyC0OYeRNg6bE9UVIiFBxN2MlA0nq2dCrgIVyyRbC05UOcrgf2Wk/CF2gGOPQKUSQ==
+  dependencies:
+    "@typescript-eslint/parser" "1.6.0"
+    "@typescript-eslint/typescript-estree" "1.6.0"
+    requireindex "^1.2.0"
+    tsutils "^3.7.0"
+
+"@typescript-eslint/parser@1.6.0", "@typescript-eslint/parser@^1.5.0":
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-1.6.0.tgz#f01189c8b90848e3b8e45a6cdad27870529d1804"
+  integrity sha512-VB9xmSbfafI+/kI4gUK3PfrkGmrJQfh0N4EScT1gZXSZyUxpsBirPL99EWZg9MmPG0pzq/gMtgkk7/rAHj4aQw==
+  dependencies:
+    "@typescript-eslint/typescript-estree" "1.6.0"
+    eslint-scope "^4.0.0"
+    eslint-visitor-keys "^1.0.0"
+
+"@typescript-eslint/typescript-estree@1.6.0":
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-1.6.0.tgz#6cf43a07fee08b8eb52e4513b428c8cdc9751ef0"
+  integrity sha512-A4CanUwfaG4oXobD5y7EXbsOHjCwn8tj1RDd820etpPAjH+Icjc2K9e/DQM1Hac5zH2BSy+u6bjvvF2wwREvYA==
+  dependencies:
+    lodash.unescape "4.0.1"
+    semver "5.5.0"
+
 JSONStream@^1.0.4, JSONStream@^1.3.4:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/JSONStream/-/JSONStream-1.3.5.tgz#3208c1f08d3a4d99261ab64f92302bc15e111ca0"
@@ -3250,6 +3346,11 @@ deepmerge@3.2.0, deepmerge@^3.2.0:
   resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-3.2.0.tgz#58ef463a57c08d376547f8869fdc5bcee957f44e"
   integrity sha512-6+LuZGU7QCNUnAJyX8cIrlzoEgggTM6B7mm+znKOX4t5ltluT9KLjN6g61ECMS0LTsLW7yDpNoxhix5FZcrIow==
 
+deepmerge@^2.0.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-2.2.1.tgz#5d3ff22a01c00f645405a2fbc17d0778a1801170"
+  integrity sha512-R9hc1Xa/NOBi9WRVUWg19rl1UB7Tt4kuPd+thNJgFZoxXsTz7ncaPaeIm+40oSGuP33DfMb4sZt1QIGiJzC4EA==
+
 default-require-extensions@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/default-require-extensions/-/default-require-extensions-2.0.0.tgz#f5f8fbb18a7d6d50b21f641f649ebb522cfe24f7"
@@ -3564,6 +3665,15 @@ eslint-import-resolver-node@^0.3.2:
     debug "^2.6.9"
     resolve "^1.5.0"
 
+eslint-import-resolver-typescript@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-import-resolver-typescript/-/eslint-import-resolver-typescript-1.1.1.tgz#e6d42172b95144ef16610fe104ef38340edea591"
+  integrity sha512-jqSfumQ+H5y3FUJ6NjRkbOQSUOlbBucGTN3ELymOtcDBbPjVdm/luvJuCfCaIXGh8sEF26ma1qVdtDgl9ndhUg==
+  dependencies:
+    debug "^4.0.1"
+    resolve "^1.4.0"
+    tsconfig-paths "^3.6.0"
+
 eslint-module-utils@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/eslint-module-utils/-/eslint-module-utils-2.3.0.tgz#546178dab5e046c8b562bbb50705e2456d7bda49"
@@ -5628,6 +5738,13 @@ json5@^0.5.0, json5@^0.5.1:
   version "0.5.1"
   resolved "http://registry.npmjs.org/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
+json5@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-1.0.1.tgz#779fb0018604fa854eacbf6252180d83543e3dbe"
+  integrity sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==
+  dependencies:
+    minimist "^1.2.0"
+
 json5@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.0.tgz#e7a0c62c48285c628d20a10b85c89bb807c32850"
@@ -5886,6 +6003,11 @@ lodash.throttle@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/lodash.throttle/-/lodash.throttle-4.1.1.tgz#c23e91b710242ac70c37f1e1cda9274cc39bf2f4"
 
+lodash.unescape@4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/lodash.unescape/-/lodash.unescape-4.0.1.tgz#bf2249886ce514cda112fae9218cdc065211fc9c"
+  integrity sha1-vyJJiGzlFM2hEvrpIYzcBlIR/Jw=
+
 lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
@@ -6351,9 +6473,10 @@ mime@1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.4.1.tgz#121f9ebc49e3766f311a76e1fa1c8003c4b03aa6"
 
-mime@^1.3.4:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+mime@^2.4.1:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.1.tgz#19eb7357bebbda37df585b14038347721558c715"
+  integrity sha512-VRUfmQO0rCd3hKwBymAn3kxYzBHr3I/wdVMywgG3HhXOwrCQgN84ZagpdTm2tZ4TNtwsSmyJWYO88mb5XvzGqQ==
 
 mimic-fn@^1.0.0:
   version "1.2.0"
@@ -6574,6 +6697,11 @@ node-fetch@^2.2.0:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.2.1.tgz#1fe551e0ded6c45b3b3b937d0fb46f76df718d1e"
 
+node-fetch@^2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.5.0.tgz#8028c49fc1191bba56a07adc6e2a954644a48501"
+  integrity sha512-YuZKluhWGJwCcUu4RlZstdAxr8bFfOVHakc1mplwHkk8J+tqM1Y5yraYvIUpeX8aY7+crCwiELJq7Vl0o0LWXw==
+
 node-gyp@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/node-gyp/-/node-gyp-4.0.0.tgz#972654af4e5dd0cd2a19081b4b46fe0442ba6f45"
@@ -7819,6 +7947,11 @@ require-uncached@^1.0.3:
     caller-path "^0.1.0"
     resolve-from "^1.0.0"
 
+requireindex@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/requireindex/-/requireindex-1.2.0.tgz#3463cdb22ee151902635aa6c9535d4de9c2ef1ef"
+  integrity sha512-L9jEkOi3ASd9PYit2cwRfyppc9NoABujTP8/5gFcbERmo5jUoAKovIC3fsF17pkTnGsrByysqX+Kxd2OTNI1ww==
+
 reselect@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/reselect/-/reselect-3.0.1.tgz#efdaa98ea7451324d092b2b2163a6a1d7a9a2147"
@@ -8016,6 +8149,11 @@ sax@~1.1.1:
   version "5.6.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.6.0.tgz#7e74256fbaa49c75aa7c7a205cc22799cac80004"
 
+semver@5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
+  integrity sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==
+
 semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
@@ -8718,10 +8856,28 @@ trim-right@^1.0.1:
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
   integrity sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=
 
-tslib@^1.9.0:
+tsconfig-paths@^3.6.0:
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/tsconfig-paths/-/tsconfig-paths-3.8.0.tgz#4e34202d5b41958f269cf56b01ed95b853d59f72"
+  integrity sha512-zZEYFo4sjORK8W58ENkRn9s+HmQFkkwydDG7My5s/fnfr2YYCaiyXe/HBUcIgU8epEKOXwiahOO+KZYjiXlWyQ==
+  dependencies:
+    "@types/json5" "^0.0.29"
+    deepmerge "^2.0.1"
+    json5 "^1.0.1"
+    minimist "^1.2.0"
+    strip-bom "^3.0.0"
+
+tslib@^1.8.1, tslib@^1.9.0:
   version "1.9.3"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
 
+tsutils@^3.7.0:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.10.0.tgz#6f1c95c94606e098592b0dff06590cf9659227d6"
+  integrity sha512-q20XSMq7jutbGB8luhKKsQldRKWvyBO2BGqni3p4yq8Ys9bEP/xQw3KepKmMRt9gJ4lvQSScrihJrcKdKoSU7Q==
+  dependencies:
+    tslib "^1.8.1"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"
@@ -8745,6 +8901,11 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
+typescript@^3.4.5:
+  version "3.4.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.5.tgz#2d2618d10bb566572b8d7aad5180d84257d70a99"
+  integrity sha512-YycBxUb49UUhdNMU5aJ7z5Ej2XGmaIBL0x34vZ82fn3hGvD+bgrMrVDpatgz2f7YxUMJxMkbWxJZeAvDxVe7Vw==
+
 ua-parser-js@^0.7.18:
   version "0.7.19"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.19.tgz#94151be4c0a7fb1d001af7022fdaca4642659e4b"