Initial commit.

packages/portal/.editorconfig

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+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[package.json]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

packages/portal/.eslintrc

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+{
+    'parser': 'babel-eslint',
+    'rules': {
+        'linebreak-style': [2, 'unix'],
+        'semi': [2, 'always'],
+        'no-console': 0,
+        'no-mixed-spaces-and-tabs': 2,
+        'indent': [2, 4],
+        'quotes': [2, 'single'],
+        'quote-props': [2, 'consistent-as-needed'],
+        'no-underscore-dangle': 0,
+        'arrow-body-style': 0,
+    },
+    'env': {
+        'es6': false,
+        'browser': true
+    },
+    'presets': [
+        'es2015'
+    ],
+    'plugins': [
+    ],
+    'whitelist': [
+    ]
+}

packages/portal/.gitattributes

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+* text=auto

packages/portal/.gitignore

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+node_modules
+dist

packages/portal/LICENSE.md

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+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
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packages/portal/README.md

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+# [Portal](https://gitlab.com/explorigin/portal)
+
+Portal is an tool to expose an API between Javascript contexts. For example, WebWorkers and the DOM
+thread can expose methods to each other.
+
+## Credit
+
+Created by [Timothy Farrell](https://github.com/explorigin)

packages/portal/package.json

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+{
+	"name": "worker-portal",
+	"version": "0.6.0",
+	"description": "Expose an API to a Web Worker",
+	"main": "src/index.js",
+	"jsnext:main": "src/index.js",
+	"files": ["dist", "src"],
+	"scripts": {
+		"lint": "eslint src",
+		"clean": "rimraf dist",
+		"build:umd": "NODE_ENV=production rollup -c",
+		"build:umd:min":
+			"npm run build:umd && uglifyjs -m --screw-ie8 -c -o dist/worker-portal.min.js dist/worker-portal.js",
+		"build:umd:gzip":
+			"npm run build:umd:min && gzip -c9 dist/worker-portal.min.js > dist/worker-portal.min.js.gz",
+		"build": "npm run build:umd:gzip && ls -l dist/",
+		"prepublish": "npm run clean && npm run build"
+	},
+	"repository": {
+		"type": "git",
+		"url": "https://gitlab.com/explorigin/worker-portal.git"
+	},
+	"keywords": ["javascript", "worker", "webworker", "promise"],
+	"author": "Timothy Farrell <tim@thecookiejar.me> (https://github.com/explorigin)",
+	"license": "Apache 2.0",
+	"bugs": {
+		"url": "https://gitlab.com/explorigin/worker-portal/issues"
+	},
+	"homepage": "https://gitlab.com/explorigin/worker-portal",
+	"devDependencies": {
+		"babel-eslint": "^7.1.1",
+		"babel-preset-es2015-rollup": "^3.0.0",
+		"eslint": "3.2.0",
+		"eslint-plugin-flow-vars": "0.5.0",
+		"eslint-plugin-flowtype": "2.4.0",
+		"rimraf": "2.5.2",
+		"rollup-plugin-babel": "^2.7.1",
+		"rollup-plugin-json": "2.0.1",
+		"uglifyjs": "2.4.10"
+	}
+}

packages/portal/rollup.config.js

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+import json from 'rollup-plugin-json';
+import babel from 'rollup-plugin-babel';
+
+const babelConfig = {
+	env: {
+		es6: true,
+		browser: true
+	},
+	plugins: [],
+	presets: ['es2015-rollup']
+};
+
+export default {
+	entry: 'src/index.js',
+	format: 'umd',
+	moduleName: 'WorkerPortal',
+	plugins: [json(), babel(babelConfig)],
+	dest: 'dist/worker-portal.js'
+};

packages/portal/src/index.js

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+// Copyright (c) 2016 Timothy Farrell
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+export function isWorker() {
+	try {
+		return self !== window;
+	} catch (e) {
+		return true;
+	}
+}
+
+function tryJSON(type, destination, id, data) {
+	const packet = [type, destination, id, data];
+	try {
+		return JSON.stringify(packet);
+	} catch (e) {
+		return packet;
+	}
+}
+
+export function WorkerPortal(context, worker, serialize) {
+	const responseMap = new Map();
+	const _worker = worker || self;
+	const contextIndex = Object.keys(context);
+	const _serialize = serialize
+		? (type, destination, id, params) => serialize(type, destination, id, params, tryJSON)
+		: tryJSON;
+	let callCount = 0;
+
+	function post(type, id, destination, params) {
+		_worker.postMessage(_serialize(type, destination, id, params));
+	}
+
+	_worker.onmessage = function dispatcher(evt) {
+		let data;
+		try {
+			data = JSON.parse(evt.data);
+		} catch (e) {
+			data = evt.data;
+		}
+		const [type, destination, id, params] = data;
+
+		function _resolve(value) {
+			post(1, id, 0, value);
+		}
+		function _reject(e) {
+			post(1, id, 1, { message: e.message, name: e.name, stack: e.stack });
+		}
+
+		// If we have received an RPC response, satisfy the promise.
+		if (type) {
+			if (responseMap.has(id)) {
+				const responses = responseMap.get(id);
+				responseMap.delete(id);
+				responses[destination](params);
+			}
+			return;
+		}
+
+		// If we have received an RPC call, execute and respond.
+		let thennable;
+		try {
+			thennable = context[contextIndex[destination]].apply(null, params);
+		} catch (e) {
+			_reject(e);
+		}
+		if (thennable && typeof thennable.then === 'function') {
+			thennable.then(_resolve).catch(_reject);
+		} else {
+			_resolve(thennable);
+		}
+	};
+	function injectionPointFactory(fnId, fnName, callbackFactory) {
+		return () =>
+			new Promise((resolve, reject) => {
+				const id = callCount;
+				callCount += 1;
+				responseMap.set(id, [callbackFactory ? callbackFactory(resolve) : resolve, reject]);
+				post(0, id, fnId, Array.from(arguments));
+			});
+	}
+
+	function resolveExternalInterfaceFactory(resolve) {
+		return linkedFunctionNames => {
+			const externalInterface = {};
+			linkedFunctionNames.forEach((fnName, index) => {
+				externalInterface[fnName] = injectionPointFactory(index, fnName);
+			});
+			resolve(externalInterface);
+			return contextIndex;
+		};
+	}
+
+	return isWorker()
+		? new Promise(resolve => {
+				contextIndex.splice(0, 0, '__init');
+				context.__init = resolveExternalInterfaceFactory(resolve);
+		  })
+		: injectionPointFactory(0, '___init___', resolveExternalInterfaceFactory)(contextIndex);
+}