Offline Caching service worker

.editorconfig

@@ -1,6 +1,8 @@
-# For more information about the properties used in this file,
+# For more information about the properties used in
-# please see the EditorConfig documentation:
+# this file, please see the EditorConfig documentation:
-# http://editorconfig.org
+# http://editorconfig.org/
+
+root = true
 
 [*]
 charset = utf-8
@@ -10,8 +12,15 @@ indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[{*.yml,package.json,*.scss,*.js}]
+[*.md]
-indent_size = 2
+trim_trailing_whitespace = false
 
-# The indent size used in the package.json file cannot be changed:
+[*.yml]
+indent_size = 2
+indent_style = space
+
+[{.travis.yml,package.json}]
+# The indent size used in the `package.json` file cannot be changed
 # https://github.com/npm/npm/pull/3180#issuecomment-16336516
+indent_size = 2
+indent_style = space

.eslintignore

@@ -0,0 +1 @@
+/client/src/thirdparty

.eslintrc

@@ -0,0 +1,262 @@
+{
+  // http://eslint.org/docs/rules/
+  "extends": "eslint:recommended",
+
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  },
+  
+  "env": {
+    "browser": true,     // browser global variables.
+    "node": true,        // Node.js global variables and Node.js-specific rules.
+    "amd": true,         // defines require() and define() as global variables as per the amd spec.
+    "mocha": false,       // adds all of the Mocha testing global variables.
+    "jasmine": false,     // adds all of the Jasmine testing global variables for version 1.3 and 2.0.
+    "phantomjs": false,   // phantomjs global variables.
+    "jquery": true,      // jquery global variables.
+    "prototypejs": false, // prototypejs global variables.
+    "shelljs": false,     // shelljs global variables.
+    "es6": true
+  },
+
+  "globals": {
+    // e.g. "angular": true
+  },
+
+  "plugins": [
+    "react",
+    "import",
+    "jquery"
+  ],
+
+  "parser": "babel-eslint",
+
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true,
+      "experimentalObjectRestSpread": true
+    }
+  },
+
+  "rules": {
+    ////////// Possible Errors //////////
+
+    "no-comma-dangle": 0,         // disallow trailing commas in object literals
+    "no-cond-assign": 0,          // disallow assignment in conditional expressions
+    "no-console": 0,              // disallow use of console (off by default in the node environment)
+    "no-constant-condition": 0,   // disallow use of constant expressions in conditions
+    "no-control-regex": 0,        // disallow control characters in regular expressions
+    "no-debugger": 0,             // disallow use of debugger
+    "no-dupe-keys": 0,            // disallow duplicate keys when creating object literals
+    "no-empty": 0,                // disallow empty statements
+    "no-empty-class": 0,          // disallow the use of empty character classes in regular expressions
+    "no-ex-assign": 0,            // disallow assigning to the exception in a catch block
+    "no-extra-boolean-cast": 0,   // disallow double-negation boolean casts in a boolean context
+    "no-extra-parens": 0,         // disallow unnecessary parentheses (off by default)
+    "no-extra-semi": 0,           // disallow unnecessary semicolons
+    "no-func-assign": 0,          // disallow overwriting functions written as function declarations
+    "no-inner-declarations": 0,   // disallow function or variable declarations in nested blocks
+    "no-invalid-regexp": 0,       // disallow invalid regular expression strings in the RegExp constructor
+    "no-irregular-whitespace": 0, // disallow irregular whitespace outside of strings and comments
+    "no-negated-in-lhs": 0,       // disallow negation of the left operand of an in expression
+    "no-obj-calls": 0,            // disallow the use of object properties of the global object (Math and JSON) as functions
+    "no-regex-spaces": 0,         // disallow multiple spaces in a regular expression literal
+    "no-reserved-keys": 0,        // disallow reserved words being used as object literal keys (off by default)
+    "no-sparse-arrays": 0,        // disallow sparse arrays
+    "no-unreachable": 0,          // disallow unreachable statements after a return, throw, continue, or break statement
+    "use-isnan": 0,               // disallow comparisons with the value NaN
+    "valid-jsdoc": 0,             // Ensure JSDoc comments are valid (off by default)
+    "valid-typeof": 0,            // Ensure that the results of typeof are compared against a valid string
+
+
+    ////////// Best Practices //////////
+
+    "block-scoped-var": 0,      // treat var statements as if they were block scoped (off by default)
+    "complexity": 0,            // specify the maximum cyclomatic complexity allowed in a program (off by default)
+    "consistent-return": 0,     // require return statements to either always or never specify values
+    "curly": 0,                 // specify curly brace conventions for all control statements
+    "default-case": 0,          // require default case in switch statements (off by default)
+    "dot-notation": 0,          // encourages use of dot notation whenever possible
+    "eqeqeq": 0,                // require the use of === and !==
+    "guard-for-in": 0,          // make sure for-in loops have an if statement (off by default)
+    "no-alert": 0,              // disallow the use of alert, confirm, and prompt
+    "no-caller": 0,             // disallow use of arguments.caller or arguments.callee
+    "no-div-regex": 0,          // disallow division operators explicitly at beginning of regular expression (off by default)
+    "no-else-return": 0,        // disallow else after a return in an if (off by default)
+    "no-empty-label": 0,        // disallow use of labels for anything other then loops and switches
+    "no-eq-null": 0,            // disallow comparisons to null without a type-checking operator (off by default)
+    "no-eval": 0,               // disallow use of eval()
+    "no-extend-native": 0,      // disallow adding to native types
+    "no-extra-bind": 0,         // disallow unnecessary function binding
+    "no-fallthrough": 0,        // disallow fallthrough of case statements
+    "no-floating-decimal": 0,   // disallow the use of leading or trailing decimal points in numeric literals (off by default)
+    "no-implied-eval": 0,       // disallow use of eval()-like methods
+    "no-iterator": 0,           // disallow usage of __iterator__ property
+    "no-labels": 0,             // disallow use of labeled statements
+    "no-lone-blocks": 0,        // disallow unnecessary nested blocks
+    "no-loop-func": 0,          // disallow creation of functions within loops
+    "no-multi-spaces": 0,       // disallow use of multiple spaces
+    "no-multi-str": 0,          // disallow use of multiline strings
+    "no-native-reassign": 0,    // disallow reassignments of native objects
+    "no-new": 0,                // disallow use of new operator when not part of the assignment or comparison
+    "no-new-func": 0,           // disallow use of new operator for Function object
+    "no-new-wrappers": 0,       // disallows creating new instances of String, Number, and Boolean
+    "no-octal": 0,              // disallow use of octal literals
+    "no-octal-escape": 0,       // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
+    "no-process-env": 0,        // disallow use of process.env (off by default)
+    "no-proto": 0,              // disallow usage of __proto__ property
+    "no-redeclare": 0,          // disallow declaring the same variable more then once
+    "no-return-assign": 0,      // disallow use of assignment in return statement
+    "no-script-url": 0,         // disallow use of javascript: urls.
+    "no-self-compare": 0,       // disallow comparisons where both sides are exactly the same (off by default)
+    "no-sequences": 0,          // disallow use of comma operator
+    "no-unused-expressions": 0, // disallow usage of expressions in statement position
+    "no-void": 0,               // disallow use of void operator (off by default)
+    "no-warning-comments": 0,   // disallow usage of configurable warning terms in comments, e.g. TODO or FIXME (off by default)
+    "no-with": 0,               // disallow use of the with statement
+    "radix": 0,                 // require use of the second argument for parseInt() (off by default)
+    "vars-on-top": 0,           // requires to declare all vars on top of their containing scope (off by default)
+    "wrap-iife": 0,             // require immediate function invocation to be wrapped in parentheses (off by default)
+    "yoda": 0,                  // require or disallow Yoda conditions
+
+
+    ////////// Strict Mode //////////
+
+    "global-strict": 0,   // (deprecated) require or disallow the "use strict" pragma in the global scope (off by default in the node environment)
+    "no-extra-strict": 0, // (deprecated) disallow unnecessary use of "use strict"; when already in strict mode
+    "strict": 0,          // controls location of Use Strict Directives
+
+
+    ////////// Variables //////////
+
+    "no-catch-shadow": 0,             // disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
+    "no-delete-var": 0,               // disallow deletion of variables
+    "no-label-var": 0,                // disallow labels that share a name with a variable
+    "no-shadow": 0,                   // disallow declaration of variables already declared in the outer scope
+    "no-shadow-restricted-names": 0,  // disallow shadowing of names such as arguments
+    "no-undef": 0,                    // disallow use of undeclared variables unless mentioned in a /*global */ block
+    "no-undef-init": 0,               // disallow use of undefined when initializing variables
+    "no-undefined": 0,                // disallow use of undefined variable (off by default)
+    "no-unused-vars": 0,              // disallow declaration of variables that are not used in the code
+    "no-use-before-define": 0,        // disallow use of variables before they are defined
+
+
+    ////////// Node.js //////////
+
+    "handle-callback-err": 0,   // enforces error handling in callbacks (off by default) (on by default in the node environment)
+    "no-mixed-requires": 0,     // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
+    "no-new-require": 0,        // disallow use of new operator with the require function (off by default) (on by default in the node environment)
+    "no-path-concat": 0,        // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
+    "no-process-exit": 0,       // disallow process.exit() (on by default in the node environment)
+    "no-restricted-modules": 0, // restrict usage of specified node modules (off by default)
+    "no-sync": 0,               // disallow use of synchronous methods (off by default)
+
+
+    ////////// Stylistic Issues //////////
+
+    "brace-style": 0,               // enforce one true brace style (off by default)
+    "camelcase": 0,                 // require camel case names
+    "comma-spacing": 0,             // enforce spacing before and after comma
+    "comma-style": 0,               // enforce one true comma style (off by default)
+    "consistent-this": 0,           // enforces consistent naming when capturing the current execution context (off by default)
+    "eol-last": 0,                  // enforce newline at the end of file, with no multiple empty lines
+    "func-names": 0,                // require function expressions to have a name (off by default)
+    "func-style": 0,                // enforces use of function declarations or expressions (off by default)
+    "key-spacing": 0,               // enforces spacing between keys and values in object literal properties
+    "max-nested-callbacks": 0,      // specify the maximum depth callbacks can be nested (off by default)
+    "new-cap": 0,                   // require a capital letter for constructors
+    "new-parens": 0,                // disallow the omission of parentheses when invoking a constructor with no arguments
+    "no-array-constructor": 0,      // disallow use of the Array constructor
+    "no-inline-comments": 0,        // disallow comments inline after code (off by default)
+    "no-lonely-if": 0,              // disallow if as the only statement in an else block (off by default)
+    "no-mixed-spaces-and-tabs": 0,  // disallow mixed spaces and tabs for indentation
+    "no-multiple-empty-lines": 0,   // disallow multiple empty lines (off by default)
+    "no-nested-ternary": 0,         // disallow nested ternary expressions (off by default)
+    "no-new-object": 0,             // disallow use of the Object constructor
+    "no-space-before-semi": 0,      // disallow space before semicolon
+    "no-spaced-func": 0,            // disallow space between function identifier and application
+    "no-ternary": 0,                // disallow the use of ternary operators (off by default)
+    "no-trailing-spaces": 0,        // disallow trailing whitespace at the end of lines
+    "no-underscore-dangle": 0,      // disallow dangling underscores in identifiers
+    "no-wrap-func": 0,              // disallow wrapping of non-IIFE statements in parens
+    "one-var": 0,                   // allow just one var statement per function (off by default)
+    "operator-assignment": 0,       // require assignment operator shorthand where possible or prohibit it entirely (off by default)
+    "padded-blocks": 0,             // enforce padding within blocks (off by default)
+    "quote-props": 0,               // require quotes around object literal property names (off by default)
+    "quotes": 0,                    // specify whether double or single quotes should be used
+    "semi": 0,                      // require or disallow use of semicolons instead of ASI
+    "sort-vars": 0,                 // sort variables within the same declaration block (off by default)
+    "space-after-function-name": 0, // require a space after function names (off by default)
+    "space-after-keywords": 0,      // require a space after certain keywords (off by default)
+    "space-before-blocks": 0,       // require or disallow space before blocks (off by default)
+    "space-in-brackets": 0,         // require or disallow spaces inside brackets (off by default)
+    "space-in-parens": 0,           // require or disallow spaces inside parentheses (off by default)
+    "space-infix-ops": 0,           // require spaces around operators
+    "space-return-throw-case": 0,   // require a space after return, throw, and case
+    "space-unary-ops": 0,           // Require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
+    "spaced-line-comment": 0,       // require or disallow a space immediately following the // in a line comment (off by default)
+    "wrap-regex": 0,                // require regex literals to be wrapped in parentheses (off by default)
+
+
+    ////////// ECMAScript 6 //////////
+
+    "no-var": 0,          // require let or const instead of var (off by default)
+    "generator-star": 0,  // enforce the position of the * in generator functions (off by default)
+
+
+    ////////// Legacy //////////
+
+    "max-depth": 0,       // specify the maximum depth that blocks can be nested (off by default)
+    "max-len": 0,         // specify the maximum length of a line in your program (off by default)
+    "max-params": 0,      // limits the number of parameters that can be used in the function declaration. (off by default)
+    "max-statements": 0,  // specify the maximum number of statement allowed in a function (off by default)
+    "no-bitwise": 0,      // disallow use of bitwise operators (off by default)
+    "no-plusplus": 0,      // disallow use of unary operators, ++ and -- (off by default)
+
+    //////// Extra //////////
+    "array-bracket-spacing": ["error", "never"],
+    "array-callback-return": "error",
+    "arrow-parens": ["error", "always"],
+    "arrow-spacing": ["error", { "before": true, "after": true }],
+    "comma-dangle": ["error", "always-multiline"],
+    "indent": ["error", 2, { "SwitchCase": 1 }],
+    "no-case-declarations": "error",
+    "no-confusing-arrow": "error",
+    "no-duplicate-imports": "error",
+    "no-param-reassign": "error",
+    "no-useless-escape": "error",
+    "object-curly-spacing": ["error", "always"],
+    "object-shorthand": ["error", "properties"],
+    "prefer-arrow-callback": "error",
+    "prefer-const": "error",
+    "prefer-template": "error",
+    "react/jsx-closing-bracket-location": "error",
+    "react/jsx-curly-spacing": ["error", "never", {"allowMultiline": true}],
+    "react/jsx-filename-extension": ["error", { "extensions": [".react.js", ".js", ".jsx"] }],
+    "react/jsx-no-duplicate-props": "error",
+    "react/jsx-no-bind": ["error", { "ignoreRefs": true, "allowArrowFunctions": true, "allowBind": false }],
+    "react/jsx-no-undef": "error",
+    "react/jsx-pascal-case": "error",
+    "react/jsx-tag-spacing": ["error", {"closingSlash": "never", "beforeSelfClosing": "always", "afterOpening": "never"}],
+    "react/jsx-uses-react": "error",
+    "react/jsx-uses-vars": "error",
+    "react/no-danger": "error",
+    "react/no-deprecated": "error",
+    "react/no-did-mount-set-state": "error",
+    "react/no-did-update-set-state": "error",
+    "react/no-direct-mutation-state": "error",
+    "react/no-is-mounted": "error",
+    "react/no-multi-comp": "error",
+    "react/prefer-es6-class": "error",
+    "react/prop-types": "error",
+    "react/require-render-return": "error",
+    "react/self-closing-comp": "error",
+    "react/sort-comp": "error",
+    "import/no-mutable-exports": "error",
+    "import/imports-first": "warn"
+  }
+}

.gitignore

@@ -1,3 +1,3 @@
-/node_modules/
+/node_modules
-/**/*.js.map
+/yarn.lock
-/**/*.css.map
+yarn-error\.log

.npmrc

@@ -0,0 +1 @@
+registry=https://npm.pkg.github.com/a2nt

README.md

@@ -10,7 +10,7 @@ composer require a2nt/silverstripe-progressivewebapp
 
 ## Usage
 - Install the module, run dev/build and fill in the settings in the siteconfig
-- Add js to register the service worker
+- Add js to register the service worker (example can be found at client/src/app.js)
 ```
 if ('serviceWorker' in navigator) {
     var baseHref = (document.getElementsByTagName('base')[0] || {}).href;

_config/config.yml

@@ -5,4 +5,8 @@ Name: progressivewebapp
 SilverStripe\Control\Director:
   rules:
     'manifest.json': 'A2nt\ProgressiveWebApp\Controllers\ManifestController'
-    'service-worker.js': 'A2nt\ProgressiveWebApp\Controllers\ServiceWorkerController'
+    'sw.js/$Action': 'A2nt\ProgressiveWebApp\Controllers\ServiceWorkerController'
+
+SilverStripe\CMS\Model\SiteTree:
+  extensions:
+    - A2nt\ProgressiveWebApp\Extensions\SiteTree

client/dist/app.js

@@ -0,0 +1,105 @@
+/******/ (function(modules) { // webpackBootstrap
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+/******/
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+/******/
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId]) {
+/******/ 			return installedModules[moduleId].exports;
+/******/ 		}
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			i: moduleId,
+/******/ 			l: false,
+/******/ 			exports: {}
+/******/ 		};
+/******/
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ 		// Flag the module as loaded
+/******/ 		module.l = true;
+/******/
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+/******/
+/******/
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+/******/
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+/******/
+/******/ 	// define getter function for harmony exports
+/******/ 	__webpack_require__.d = function(exports, name, getter) {
+/******/ 		if(!__webpack_require__.o(exports, name)) {
+/******/ 			Object.defineProperty(exports, name, { enumerable: true, get: getter });
+/******/ 		}
+/******/ 	};
+/******/
+/******/ 	// define __esModule on exports
+/******/ 	__webpack_require__.r = function(exports) {
+/******/ 		if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
+/******/ 			Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
+/******/ 		}
+/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
+/******/ 	};
+/******/
+/******/ 	// create a fake namespace object
+/******/ 	// mode & 1: value is a module id, require it
+/******/ 	// mode & 2: merge all properties of value into the ns
+/******/ 	// mode & 4: return value when already ns object
+/******/ 	// mode & 8|1: behave like require
+/******/ 	__webpack_require__.t = function(value, mode) {
+/******/ 		if(mode & 1) value = __webpack_require__(value);
+/******/ 		if(mode & 8) return value;
+/******/ 		if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
+/******/ 		var ns = Object.create(null);
+/******/ 		__webpack_require__.r(ns);
+/******/ 		Object.defineProperty(ns, 'default', { enumerable: true, value: value });
+/******/ 		if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
+/******/ 		return ns;
+/******/ 	};
+/******/
+/******/ 	// getDefaultExport function for compatibility with non-harmony modules
+/******/ 	__webpack_require__.n = function(module) {
+/******/ 		var getter = module && module.__esModule ?
+/******/ 			function getDefault() { return module['default']; } :
+/******/ 			function getModuleExports() { return module; };
+/******/ 		__webpack_require__.d(getter, 'a', getter);
+/******/ 		return getter;
+/******/ 	};
+/******/
+/******/ 	// Object.prototype.hasOwnProperty.call
+/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
+/******/
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = "/mnt/data/srv/dist/web/nysca/vendor/a2nt/silverstripe-progressivewebapp/client/dist";
+/******/
+/******/
+/******/ 	// Load entry module and return exports
+/******/ 	return __webpack_require__(__webpack_require__.s = "./client/src/app.js");
+/******/ })
+/************************************************************************/
+/******/ ({
+
+/***/ "./client/src/app.js":
+/***/ (function(module, exports) {
+
+if ('serviceWorker' in navigator) {
+  var baseHref = (document.getElementsByTagName('base')[0] || {}).href;
+
+  if (baseHref) {
+    navigator.serviceWorker.register("".concat(baseHref, "sw.js")).then(function () {
+      console.log('Service Worker Registered');
+    });
+  }
+}
+
+/***/ })
+
+/******/ });
+//# sourceMappingURL=app.js.map

client/dist/app.js.map

@@ -0,0 +1 @@
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client/dist/sw.js

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+/******/ (function(modules) { // webpackBootstrap
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+/******/
+/******/ 	// The require function
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+/******/
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId]) {
+/******/ 			return installedModules[moduleId].exports;
+/******/ 		}
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			i: moduleId,
+/******/ 			l: false,
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+/******/
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ 		// Flag the module as loaded
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+/******/ 	}
+/******/
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+/******/ ({
+
+/***/ "./client/src/sw.js":
+/***/ (function(module, exports, __webpack_require__) {
+
+// caches polyfill because it is not added to native yet!
+var caches = __webpack_require__("./client/src/thirdparty/serviceworker-caches.js");
+
+if (typeof self.CACHE_NAME !== 'string') {
+  throw new Error('Cache Name cannot be empty');
+}
+
+self.addEventListener('fetch', function (event) {
+  // Clone the request for fetch and cache
+  // A request is a stream and can be consumed only once.
+  var fetchRequest = event.request.clone(),
+      cacheRequest = event.request.clone(); // Respond with content from fetch or cache
+
+  event.respondWith( // Try fetch
+  fetch(fetchRequest) // when fetch is successful, we update the cache
+  .then(function (response) {
+    // A response is a stream and can be consumed only once.
+    // Because we want the browser to consume the response,
+    // as well as cache to consume the response, we need to
+    // clone it so we have 2 streams
+    var responseToCache = response.clone(); // and update the cache
+
+    caches.open(self.CACHE_NAME).then(function (cache) {
+      // Clone the request again to use it
+      // as the key for our cache
+      var cacheSaveRequest = event.request.clone();
+      cache.put(cacheSaveRequest, responseToCache);
+    }); // Return the response stream to be consumed by browser
+
+    return response;
+  }) // when fetch times out or fails
+  .catch(function (err) {
+    // Return the promise which
+    // resolves on a match in cache for the current request
+    // or rejects if no matches are found
+    return caches.match(cacheRequest);
+  }));
+}); // Now we need to clean up resources in the previous versions
+// of Service Worker scripts
+
+self.addEventListener('activate', function (event) {
+  // Destroy the cache
+  event.waitUntil(caches.delete(self.CACHE_NAME));
+});
+
+/***/ }),
+
+/***/ "./client/src/thirdparty/serviceworker-caches.js":
+/***/ (function(module, exports) {
+
+if (!Cache.prototype.add) {
+  Cache.prototype.add = function add(request) {
+    return this.addAll([request]);
+  };
+}
+
+if (!Cache.prototype.addAll) {
+  Cache.prototype.addAll = function addAll(requests) {
+    var cache = this; // Since DOMExceptions are not constructable:
+
+    function NetworkError(message) {
+      this.name = 'NetworkError';
+      this.code = 19;
+      this.message = message;
+    }
+
+    NetworkError.prototype = Object.create(Error.prototype);
+    return Promise.resolve().then(function () {
+      if (arguments.length < 1) throw new TypeError(); // Simulate sequence<(Request or USVString)> binding:
+
+      var sequence = [];
+      requests = requests.map(function (request) {
+        if (request instanceof Request) {
+          return request;
+        } else {
+          return String(request); // may throw TypeError
+        }
+      });
+      return Promise.all(requests.map(function (request) {
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        var scheme = new URL(request.url).protocol;
+
+        if (scheme !== 'http:' && scheme !== 'https:') {
+          throw new NetworkError('Invalid scheme');
+        }
+
+        return fetch(request.clone());
+      }));
+    }).then(function (responses) {
+      // TODO: check that requests don't overwrite one another
+      // (don't think this is possible to polyfill due to opaque responses)
+      return Promise.all(responses.map(function (response, i) {
+        return cache.put(requests[i], response);
+      }));
+    }).then(function () {
+      return undefined;
+    });
+  };
+}
+
+if (!CacheStorage.prototype.match) {
+  // This is probably vulnerable to race conditions (removing caches etc)
+  CacheStorage.prototype.match = function match(request, opts) {
+    var caches = this;
+    return this.keys().then(function (cacheNames) {
+      var match;
+      return cacheNames.reduce(function (chain, cacheName) {
+        return chain.then(function () {
+          return match || caches.open(cacheName).then(function (cache) {
+            return cache.match(request, opts);
+          }).then(function (response) {
+            match = response;
+            return match;
+          });
+        });
+      }, Promise.resolve());
+    });
+  };
+}
+
+module.exports = self.caches;
+
+/***/ })
+
+/******/ });
+//# sourceMappingURL=sw.js.map

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module and return exports\n \treturn __webpack_require__(__webpack_require__.s = \"./client/src/sw.js\");\n","// caches polyfill because it is not added to native yet!\nvar caches = require('./thirdparty/serviceworker-caches');\n\nif (typeof self.CACHE_NAME !== 'string') {\n  throw new Error('Cache Name cannot be empty');\n}\n\nself.addEventListener('fetch', (event) => {\n  // Clone the request for fetch and cache\n  // A request is a stream and can be consumed only once.\n  var fetchRequest = event.request.clone(),\n    cacheRequest = event.request.clone();\n\n  // Respond with content from fetch or cache\n  event.respondWith(\n    // Try fetch\n    fetch(fetchRequest)\n      // when fetch is successful, we update the cache\n      .then((response) => {\n        // A response is a stream and can be consumed only once.\n        // Because we want the browser to consume the response,\n        // as well as cache to consume the response, we need to\n        // clone it so we have 2 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=== 'string') {\n              request = new Request(request);\n            }\n\n            var scheme = new URL(request.url).protocol;\n\n            if (scheme !== 'http:' && scheme !== 'https:') {\n              throw new NetworkError('Invalid scheme');\n            }\n\n            return fetch(request.clone());\n          }),\n        );\n      })\n      .then((responses) => {\n        // TODO: check that requests don't overwrite one another\n        // (don't think this is possible to polyfill due to opaque responses)\n        return Promise.all(\n          responses.map((response, i) => {\n            return cache.put(requests[i], response);\n          }),\n        );\n      })\n      .then(() => {\n        return undefined;\n      });\n  };\n}\n\nif (!CacheStorage.prototype.match) {\n  // This is probably vulnerable to race conditions (removing caches etc)\n  CacheStorage.prototype.match = function match(request, opts) {\n    var caches = this;\n\n    return this.keys().then((cacheNames) => {\n      var match;\n\n      return cacheNames.reduce((chain, cacheName) => {\n        return chain.then(() => {\n          return (\n            match ||\n            caches\n              .open(cacheName)\n              .then((cache) => {\n                return cache.match(request, opts);\n              })\n              .then((response) => {\n                match = response;\n                return match;\n              })\n          );\n        });\n      }, Promise.resolve());\n    });\n  };\n}\n\nmodule.exports = self.caches;\n"],"sourceRoot":""}

client/src/app.js

@@ -0,0 +1,8 @@
+if ('serviceWorker' in navigator) {
+  var baseHref = (document.getElementsByTagName('base')[0] || {}).href;
+  if (baseHref) {
+    navigator.serviceWorker.register(`${baseHref}sw.js`).then(() => {
+      console.log('Service Worker Registered');
+    });
+  }
+}

client/src/sw.js

@@ -0,0 +1,53 @@
+// caches polyfill because it is not added to native yet!
+var caches = require('./thirdparty/serviceworker-caches');
+
+if (typeof self.CACHE_NAME !== 'string') {
+  throw new Error('Cache Name cannot be empty');
+}
+
+self.addEventListener('fetch', (event) => {
+  // Clone the request for fetch and cache
+  // A request is a stream and can be consumed only once.
+  var fetchRequest = event.request.clone(),
+    cacheRequest = event.request.clone();
+
+  // Respond with content from fetch or cache
+  event.respondWith(
+    // Try fetch
+    fetch(fetchRequest)
+      // when fetch is successful, we update the cache
+      .then((response) => {
+        // A response is a stream and can be consumed only once.
+        // Because we want the browser to consume the response,
+        // as well as cache to consume the response, we need to
+        // clone it so we have 2 streams
+        var responseToCache = response.clone();
+
+        // and update the cache
+        caches.open(self.CACHE_NAME).then((cache) => {
+          // Clone the request again to use it
+          // as the key for our cache
+          var cacheSaveRequest = event.request.clone();
+          cache.put(cacheSaveRequest, responseToCache);
+        });
+
+        // Return the response stream to be consumed by browser
+        return response;
+      })
+
+      // when fetch times out or fails
+      .catch((err) => {
+        // Return the promise which
+        // resolves on a match in cache for the current request
+        // or rejects if no matches are found
+        return caches.match(cacheRequest);
+      }),
+  );
+});
+
+// Now we need to clean up resources in the previous versions
+// of Service Worker scripts
+self.addEventListener('activate', (event) => {
+  // Destroy the cache
+  event.waitUntil(caches.delete(self.CACHE_NAME));
+});

client/src/thirdparty/google-analytics-offline.js

@@ -0,0 +1,259 @@
+/*
+ Copyright 2014 Google Inc. All Rights Reserved.
+ 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.
+*/
+
+// While overkill for this specific sample in which there is only one cache,
+// this is one best practice that can be followed in general to keep track of
+// multiple caches used by a given service worker, and keep them all versioned.
+// It maps a shorthand identifier for a cache to a specific, versioned cache name.
+
+// Note that since global state is discarded in between service worker restarts, these
+// variables will be reinitialized each time the service worker handles an event, and you
+// should not attempt to change their values inside an event handler. (Treat them as constants.)
+
+// If at any point you want to force pages that use this service worker to start using a fresh
+// cache, then increment the CACHE_VERSION value. It will kick off the service worker update
+// flow and the old cache(s) will be purged as part of the activate event handler when the
+// updated service worker is activated.
+var CACHE_VERSION = 1;
+var CURRENT_CACHES = {
+  'offline-analytics': `offline-analytics-v${  CACHE_VERSION}`,
+};
+
+var idbDatabase;
+var IDB_VERSION = 1;
+var STOP_RETRYING_AFTER = 86400000; // One day, in milliseconds.
+var STORE_NAME = 'urls';
+
+// This is basic boilerplate for interacting with IndexedDB. Adapted from
+// https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB
+function openDatabaseAndReplayRequests() {
+  var indexedDBOpenRequest = indexedDB.open('offline-analytics', IDB_VERSION);
+
+  // This top-level error handler will be invoked any time there's an IndexedDB-related error.
+  indexedDBOpenRequest.onerror = function(error) {
+    console.error('IndexedDB error:', error);
+  };
+
+  // This should only execute if there's a need to create a new database for the given IDB_VERSION.
+  indexedDBOpenRequest.onupgradeneeded = function() {
+    this.result.createObjectStore(STORE_NAME, { keyPath: 'url' });
+  };
+
+  // This will execute each time the database is opened.
+  indexedDBOpenRequest.onsuccess = function() {
+    idbDatabase = this.result;
+    replayAnalyticsRequests();
+  };
+}
+
+// Helper method to get the object store that we care about.
+function getObjectStore(storeName, mode) {
+  return idbDatabase.transaction(storeName, mode).objectStore(storeName);
+}
+
+function replayAnalyticsRequests() {
+  var savedRequests = [];
+
+  getObjectStore(STORE_NAME).openCursor().onsuccess = function(event) {
+    // See https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB#Using_a_cursor
+    var cursor = event.target.result;
+
+    if (cursor) {
+      // Keep moving the cursor forward and collecting saved requests.
+      savedRequests.push(cursor.value);
+      cursor.continue();
+    } else {
+      // At this point, we have all the saved requests.
+      console.log(
+        'About to replay %d saved Google Analytics requests...',
+        savedRequests.length,
+      );
+
+      savedRequests.forEach((savedRequest) => {
+        var queueTime = Date.now() - savedRequest.timestamp;
+        if (queueTime > STOP_RETRYING_AFTER) {
+          getObjectStore(STORE_NAME, 'readwrite').delete(savedRequest.url);
+          console.log(
+            ' Request has been queued for %d milliseconds. ' +
+              'No longer attempting to replay.',
+            queueTime,
+          );
+        } else {
+          // The qt= URL parameter specifies the time delta in between right now, and when the
+          // /collect request was initially intended to be sent. See
+          // https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#qt
+          var requestUrl = `${savedRequest.url  }&qt=${  queueTime}`;
+
+          console.log(' Replaying', requestUrl);
+
+          fetch(requestUrl)
+            .then((response) => {
+              if (response.status < 400) {
+                // If sending the /collect request was successful, then remove it from the IndexedDB.
+                getObjectStore(STORE_NAME, 'readwrite').delete(
+                  savedRequest.url,
+                );
+                console.log(' Replaying succeeded.');
+              } else {
+                // This will be triggered if, e.g., Google Analytics returns a HTTP 50x response.
+                // The request will be replayed the next time the service worker starts up.
+                console.error(' Replaying failed:', response);
+              }
+            })
+            .catch((error) => {
+              // This will be triggered if the network is still down. The request will be replayed again
+              // the next time the service worker starts up.
+              console.error(' Replaying failed:', error);
+            });
+        }
+      });
+    }
+  };
+}
+
+// Open the IndexedDB and check for requests to replay each time the service worker starts up.
+// Since the service worker is terminated fairly frequently, it should start up again for most
+// page navigations. It also might start up if it's used in a background sync or a push
+// notification context.
+openDatabaseAndReplayRequests();
+
+self.addEventListener('activate', (event) => {
+  // Delete all caches that aren't named in CURRENT_CACHES.
+  // While there is only one cache in this example, the same logic will handle the case where
+  // there are multiple versioned caches.
+  var expectedCacheNames = Object.keys(CURRENT_CACHES).map((key) => {
+    return CURRENT_CACHES[key];
+  });
+
+  event.waitUntil(
+    // `caches` refers to the global CacheStorage object, and is defined at
+    // http://slightlyoff.github.io/ServiceWorker/spec/service_worker/#self-caches
+    caches.keys().then((cacheNames) => {
+      return Promise.all(
+        cacheNames.map((cacheName) => {
+          if (expectedCacheNames.indexOf(cacheName) === -1) {
+            // If this cache name isn't present in the array of "expected" cache names, then delete it.
+            console.log('Deleting out of date cache:', cacheName);
+            return caches.delete(cacheName);
+          }
+        }),
+      );
+    }),
+  );
+});
+
+// This sample illustrates an aggressive approach to caching, in which every valid response is
+// cached and every request is first checked against the cache.
+// This may not be an appropriate approach if your web application makes requests for
+// arbitrary URLs as part of its normal operation (e.g. a RSS client or a news aggregator),
+// as the cache could end up containing large responses that might not end up ever being accessed.
+// Other approaches, like selectively caching based on response headers or only caching
+// responses served from a specific domain, might be more appropriate for those use cases.
+self.addEventListener('fetch', (event) => {
+  console.log('Handling fetch event for', event.request.url);
+
+  event.respondWith(
+    caches.open(CURRENT_CACHES['offline-analytics']).then((cache) => {
+      return cache
+        .match(event.request)
+        .then((response) => {
+          if (response) {
+            // If there is an entry in the cache for event.request, then response will be defined
+            // and we can just return it.
+            console.log(' Found response in cache:', response);
+
+            return response;
+          }
+
+          // Otherwise, if there is no entry in the cache for event.request, response will be
+          // undefined, and we need to fetch() the resource.
+          console.log(
+            ' No response for %s found in cache. ' +
+              'About to fetch from network...',
+            event.request.url,
+          );
+
+          // We call .clone() on the request since we might use it in the call to cache.put() later on.
+          // Both fetch() and cache.put() "consume" the request, so we need to make a copy.
+          // (see https://fetch.spec.whatwg.org/#dom-request-clone)
+          return fetch(event.request.clone())
+            .then((response) => {
+              console.log(
+                '  Response for %s from network is: %O',
+                event.request.url,
+                response,
+              );
+
+              // Optional: add in extra conditions here, e.g. response.type == 'basic' to only cache
+              // responses from the same domain. See https://fetch.spec.whatwg.org/#concept-response-type
+              if (response.status < 400) {
+                // This avoids caching responses that we know are errors (i.e. HTTP status code of 4xx or 5xx).
+                // One limitation is that, for non-CORS requests, we get back a filtered opaque response
+                // (https://fetch.spec.whatwg.org/#concept-filtered-response-opaque) which will always have a
+                // .status of 0, regardless of whether the underlying HTTP call was successful. Since we're
+                // blindly caching those opaque responses, we run the risk of caching a transient error response.
+                //
+                // We need to call .clone() on the response object to save a copy of it to the cache.
+                // (https://fetch.spec.whatwg.org/#dom-request-clone)
+                cache.put(event.request, response.clone());
+              } else if (response.status >= 500) {
+                // If this is a Google Analytics ping then we want to retry it if a HTTP 5xx response
+                // was returned, just like we'd retry it if the network was down.
+                checkForAnalyticsRequest(event.request.url);
+              }
+
+              // Return the original response object, which will be used to fulfill the resource request.
+              return response;
+            })
+            .catch((error) => {
+              // The catch() will be triggered for network failures. Let's see if it was a request for
+              // a Google Analytics ping, and save it to be retried if it was.
+              checkForAnalyticsRequest(event.request.url);
+
+              throw error;
+            });
+        })
+        .catch((error) => {
+          // This catch() will handle exceptions that arise from the match() or fetch() operations.
+          // Note that a HTTP error response (e.g. 404) will NOT trigger an exception.
+          // It will return a normal response object that has the appropriate error code set.
+          throw error;
+        });
+    }),
+  );
+});
+
+function checkForAnalyticsRequest(requestUrl) {
+  // Construct a URL object (https://developer.mozilla.org/en-US/docs/Web/API/URL.URL)
+  // to make it easier to check the various components without dealing with string parsing.
+  var url = new URL(requestUrl);
+
+  if (
+    (url.hostname === 'www.google-analytics.com' ||
+      url.hostname === 'ssl.google-analytics.com') &&
+    url.pathname === '/collect'
+  ) {
+    console.log(
+      '  Storing Google Analytics request in IndexedDB ' +
+        'to be replayed later.',
+    );
+    saveAnalyticsRequest(requestUrl);
+  }
+}
+
+function saveAnalyticsRequest(requestUrl) {
+  getObjectStore(STORE_NAME, 'readwrite').add({
+    url: requestUrl,
+    timestamp: Date.now(),
+  });
+}

client/src/thirdparty/serviceworker-caches.js

@@ -0,0 +1,93 @@
+if (!Cache.prototype.add) {
+  Cache.prototype.add = function add(request) {
+    return this.addAll([request]);
+  };
+}
+
+if (!Cache.prototype.addAll) {
+  Cache.prototype.addAll = function addAll(requests) {
+    var cache = this;
+
+    // Since DOMExceptions are not constructable:
+    function NetworkError(message) {
+      this.name = 'NetworkError';
+      this.code = 19;
+      this.message = message;
+    }
+    NetworkError.prototype = Object.create(Error.prototype);
+
+    return Promise.resolve()
+      .then(function() {
+        if (arguments.length < 1) throw new TypeError();
+
+        // Simulate sequence<(Request or USVString)> binding:
+        var sequence = [];
+
+        requests = requests.map((request) => {
+          if (request instanceof Request) {
+            return request;
+          } else {
+            return String(request); // may throw TypeError
+          }
+        });
+
+        return Promise.all(
+          requests.map((request) => {
+            if (typeof request === 'string') {
+              request = new Request(request);
+            }
+
+            var scheme = new URL(request.url).protocol;
+
+            if (scheme !== 'http:' && scheme !== 'https:') {
+              throw new NetworkError('Invalid scheme');
+            }
+
+            return fetch(request.clone());
+          }),
+        );
+      })
+      .then((responses) => {
+        // TODO: check that requests don't overwrite one another
+        // (don't think this is possible to polyfill due to opaque responses)
+        return Promise.all(
+          responses.map((response, i) => {
+            return cache.put(requests[i], response);
+          }),
+        );
+      })
+      .then(() => {
+        return undefined;
+      });
+  };
+}
+
+if (!CacheStorage.prototype.match) {
+  // This is probably vulnerable to race conditions (removing caches etc)
+  CacheStorage.prototype.match = function match(request, opts) {
+    var caches = this;
+
+    return this.keys().then((cacheNames) => {
+      var match;
+
+      return cacheNames.reduce((chain, cacheName) => {
+        return chain.then(() => {
+          return (
+            match ||
+            caches
+              .open(cacheName)
+              .then((cache) => {
+                return cache.match(request, opts);
+              })
+              .then((response) => {
+                match = response;
+                return match;
+              })
+          );
+        });
+      }, Promise.resolve());
+    });
+  };
+}
+
+module.exports = self.caches;

package-lock.json

@@ -0,0 +1,6598 @@
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+  "version": "1.8.7",
+  "lockfileVersion": 1,
+  "requires": true,
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+      "dev": true,
+      "requires": {
+        "@babel/highlight": "7.0.0-beta.44"
+      }
+    },
+    "@babel/generator": {
+      "version": "7.0.0-beta.44",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.0.0-beta.44.tgz",
+      "integrity": "sha512-5xVb7hlhjGcdkKpMXgicAVgx8syK5VJz193k0i/0sLP6DzE6lRrU1K3B/rFefgdo9LPGMAOOOAWW4jycj07ShQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "7.0.0-beta.44",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.2.0",
+        "source-map": "^0.5.0",
+        "trim-right": "^1.0.1"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.0.0-beta.44",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.44.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/helper-get-function-arity": "7.0.0-beta.44",
+        "@babel/template": "7.0.0-beta.44",
+        "@babel/types": "7.0.0-beta.44"
+      }
+    },
+    "@babel/helper-get-function-arity": {
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+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "path-exists": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
+          "dev": true
+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    },
+    "yarn": {
+      "version": "1.22.4",
+      "resolved": "https://registry.npmjs.org/yarn/-/yarn-1.22.4.tgz",
+      "integrity": "sha512-oYM7hi/lIWm9bCoDMEWgffW8aiNZXCWeZ1/tGy0DWrN6vmzjCXIKu2Y21o8DYVBUtiktwKcNoxyGl/2iKLUNGA=="
+    }
+  }
+}

package.json

@@ -0,0 +1,96 @@
+{
+  "name": "@a2nt/silverstripe-progressivewebapp",
+  "version": "1.8.7",
+  "author": "Tony Air <tony@twma.pro>",
+  "license": "MIT",
+  "description": "SilverStripe Service Worker",
+  "private": false,
+  "main": "client/src/app.js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/a2nt/webpack-bootstrap-ui-kit"
+  },
+  "engines": {
+    "yarn": ">= 1.0.0"
+  },
+  "scripts": {
+    "start": "cross-env NODE_ENV=development webpack-dev-server --https -d --config webpack.config.js",
+    "dash": "cross-env NODE_ENV=development webpack-dashboard -- webpack-dev-server --config webpack.config.js",
+    "build": "cross-env NODE_ENV=production webpack -p --config webpack.config.js --progress",
+    "lint:check": "eslint ./client/src --config .eslintrc",
+    "lint:fix": "eslint ./client/src --config .eslintrc --fix",
+    "lint:js": "eslint ./client/src --config .eslintrc",
+    "prebuild": "yarn lint:fix && rimraf ./client/dist",
+    "prepare": "yarn lint:fix && yarn build",
+    "prunecaches": "rimraf ./node_modules/.cache/",
+    "postinstall": "npm run prunecaches",
+    "postuninstall": "npm run prunecaches"
+  },
+  "dependencies": {
+    "yarn": "^1.22.4"
+  },
+  "devDependencies": {
+    "babel-loader": "*",
+    "@babel/preset-env": "*",
+    "babel-eslint": "^8.2.6",
+    "rimraf": "^2.6.3",
+    "terser-webpack-plugin": "^2.3.5",
+    "url-loader": "^0.6.2",
+    "webpack": "^4.42.0",
+    "webpack-cli": "^3.3.11",
+    "webpack-dev-server": "^3.10.3",
+    "webpack-manifest-plugin": "^1.3.2",
+    "webpack-merge": "^4.1.1",
+    "hard-source-webpack-plugin": "^0.13.1"
+  },
+  "publishConfig": {
+    "registry": "https://npm.pkg.github.com/"
+  },
+  "browserslist": [
+    "defaults",
+    "ie>=11"
+  ],
+  "stylelint": {
+    "rules": {
+      "block-no-empty": null,
+      "color-no-invalid-hex": true,
+      "comment-empty-line-before": [
+        "always",
+        {
+          "ignore": [
+            "stylelint-commands",
+            "after-comment"
+          ]
+        }
+      ],
+      "declaration-colon-space-after": "always",
+      "indentation": [
+        4,
+        {
+          "except": [
+            "value"
+          ]
+        }
+      ],
+      "max-empty-lines": 2,
+      "rule-empty-line-before": [
+        "always",
+        {
+          "except": [
+            "first-nested"
+          ],
+          "ignore": [
+            "after-comment"
+          ]
+        }
+      ],
+      "unit-whitelist": [
+        "em",
+        "rem",
+        "%",
+        "s",
+        "px"
+      ]
+    }
+  }
+}

src/Controllers/ManifestController.php

@@ -3,10 +3,15 @@
 namespace A2nt\ProgressiveWebApp\Controllers;
 
 use SilverStripe\Control\Controller;
+use SilverStripe\Control\Director;
 use SilverStripe\SiteConfig\SiteConfig;
+use Site\Pages\HomePage;
 
-class ManifestController extends Controller {
+class ManifestController extends Controller
+{
 
+    private static $gcm_sender_id;
+    private static $background = '#000000';
     /**
      * @var array
      */
@@ -19,13 +24,99 @@ class ManifestController extends Controller {
      *
      * @return mixed
      */
-    public function index($url) {
+    public function index($url)
+    {
+        $cfg = $this->config();
+        $cfg_site = SiteConfig::current_site_config();
 
-        $config = SiteConfig::current_site_config();
+        $baseURL = Director::absoluteBaseURL();
+        $icons_path = self::join_links($baseURL, RESOURCES_DIR, 'app', 'client', 'dist', 'icons');
 
-        $manifestContent = [];
+        $title = $cfg_site->getField('Title');
-        $this->getResponse()->addHeader('Content-Type', 'application/manifest+json; charset="utf-8"');
+        $desc = $cfg_site->getField('Description');
-        return json_encode($manifestContent);
+        $desc = $desc ?: $title;
+
+        $manifestContent = [
+            'lang' => 'en',
+            'dir' => 'ltr',
+            'url' => $baseURL,
+            'name' => $title,
+            'short_name' => $title,
+            'description' => $desc,
+            'start_url' => '/',
+            'scope' => '/',
+            'permissions' => [
+                'gcm',
+            ],
+            'display' => 'fullscreen',
+            'background_color' => $cfg->get('background'),
+            'theme_color' => $cfg->get('background'),
+            'orientation' => 'portrait-primary',
+            'serviceworker' => [
+                'src' => 'sw.js',
+                'scope' => '/',
+                'use_cache' => true,
+            ],
+            'icons' => [
+                [
+                    'src' => self::join_links($icons_path, 'favicon-16x16.png'),
+                    'sizes' => '16x16',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'favicon-32x32.png'),
+                    'sizes' => '32x32',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'android-chrome-48x48.png'),
+                    'sizes' => '48x48',
+                    'type' => 'image/png',
+                ],[
+                    'src' => self::join_links($icons_path, 'android-chrome-72x72.png'),
+                    'sizes' => '72x72',
+                    'type' => 'image/png',
+                ], [
+                    'src' => self::join_links($icons_path, 'android-chrome-96x96.png'),
+                    'sizes' => '96x96',
+                    'type' => 'image/png',
+                ], [
+                    'src' => self::join_links($icons_path, 'android-chrome-144x144.png'),
+                    'sizes' => '144x144',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'android-chrome-192x192.png'),
+                    'sizes' => '192x192',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'android-chrome-256x256.png'),
+                    'sizes' => '256x256',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'android-chrome-384x384.png'),
+                    'sizes' => '384x384',
+                    'type' => 'image/png',
+                ],
+                [
+                    'src' => self::join_links($icons_path, 'android-chrome-384x384.png'),
+                    'sizes' => '512x512',
+                    'type' => 'image/png',
+                ],
+            ]
+        ];
+
+
+        $gcm_sender_id = $cfg->get('gcm_sender_id');
+        if($gcm_sender_id) {
+            $manifestContent['gcm_sender_id'] = $gcm_sender_id;
+            $manifestContent['gcm_user_visible_only'] = true;
         }
 
+        $this->getResponse()->addHeader('Content-Type', 'application/manifest+json; charset="utf-8"');
+
+        return json_encode($manifestContent);
+    }
 }

src/Controllers/ServiceWorkerController.php

@@ -15,30 +15,56 @@ class ServiceWorkerController extends Controller {
      * @var array
      */
     private static $allowed_actions = [
-        'index'
+        'index',
     ];
 
     /**
      * @config
      */
     private static $debug_mode = false;
+    private static $version = '1';
 
     /**
      * Default controller action for the service-worker.js file
      *
      * @return mixed
      */
-    public function index($url) {
+    public function index($req) {
-        $this->getResponse()->addHeader('Content-Type', 'application/javascript; charset="utf-8"');
+        $resp = $this->getResponse();
-        return $this->renderWith('ServiceWorker');
+        $script = file_get_contents(self::getScriptPath());
+
+        if($req->param('Action') === 'cachequeue') {
+            return json_encode([
+                'urls' => [
+                    self::join_links(self::BaseUrl(),'app','client','dist','app.js')
+                ]
+            ]);
+        }
+
+        $resp->addHeader('Content-Type', 'application/javascript; charset="utf-8"');
+        return $this->customise([
+            'Script' => $script,
+        ])->renderWith('ServiceWorker');
+    }
+
+    private static function getScriptPath()
+    {
+        return join(DIRECTORY_SEPARATOR, [
+            __DIR__,
+            '..',
+            '..',
+            'client',
+            'dist',
+            'sw.js',
+        ]);
     }
 
     /**
      * Base URL
      * @return varchar
      */
-    public function BaseUrl() {
+    public static function BaseUrl() {
-        return Director::baseURL();
+        return Director::absoluteBaseURL();
     }
 
     /**
@@ -52,6 +78,10 @@ class ServiceWorkerController extends Controller {
         return $this->config()->get('debug_mode');
     }
 
+    public function Version() {
+        return $this->config()->get('version').filemtime(self::getScriptPath());
+    }
+
     /**
      * A list with file to cache in the install event
      * @return ArrayList

src/Extensions/SiteTree.php

@@ -0,0 +1,25 @@
+<?php
+
+
+namespace A2nt\ProgressiveWebApp\Extensions;
+
+
+use SilverStripe\Forms\CheckboxField;
+use SilverStripe\Forms\FieldList;
+use SilverStripe\ORM\DataExtension;
+
+class SiteTree extends DataExtension
+{
+    private static $db = [
+        'AvailableOffline' => 'Boolean(1)',
+    ];
+
+    public function updateCMSFields(FieldList $fields)
+    {
+        parent::updateCMSFields($fields);
+
+        $fields->addFieldsToTab('Root.Settings', [
+           CheckboxField::create('AvailableOffline', 'Make page available offline'),
+        ]);
+    }
+}

templates/ServiceWorker.ss

@@ -1,127 +1,10 @@
-<%--<script>//Ugly fix for code highlights--%>
+'use strict';
-    var version = 'v1::';
+var version = '{$Version}',
-    var debug = <% if $DebugMode %>true<% else %>false<% end_if %>;
+    appDomain = '{$BaseUrl}',
+    lang = 'en',
+    debug = <% if $DebugMode %>true<% else %>false<% end_if %>,
+    isPushEnabled = true,
+    offline = false,
+    CACHE_NAME = 'sw' + version;
+$Script.RAW;
 
-    /**
-     * Console.log proxy for quick enabling/disabling
-     */
-    function log(msg){
-        if(debug){
-            console.log(msg);
-        }
-    }
-
-    /**
-     * Service worker installation
-     */
-    self.addEventListener('install', function (event) {
-        log('Service worker: install start');
-        event.waitUntil(caches.open(version + 'fundamentals').then(function (cache) {
-            //Install all required pages/assets
-            return cache.addAll([
-                '$BaseUrl'<% if $CacheOnInstall %>,<% end_if %>
-                <% if $CacheOnInstall %>
-                    <% loop $CacheOnInstall %>
-                        '$Path'<% if not $Last %>,<% end_if %>
-                    <% end_loop %>
-                <% end_if %>
-            ]);
-        }).then(function () {
-            log('Service worker: install completed');
-        }).catch(function(){
-            log('Service worker: install failed');
-        }));
-    });
-
-    /**
-     * Service worker activation
-     */
-    self.addEventListener('activate', function (event) {
-        log('Service worker: activate start');
-        event.waitUntil(caches.keys().then(function (keys) {
-            //Remove old cache entries
-            return Promise.all(keys.filter(function (key) {
-                return !key.startsWith(version);
-            }).map(function (key) {
-                return caches.delete(key);
-            }));
-        }).then(function () {
-            log('Service worker: activate completed');
-        }));
-    });
-
-    /**
-     * Fetch handler
-     */
-    self.addEventListener('fetch', function (event) {
-        //We are only interested in get requests
-        if (event.request.method !== 'GET') {
-            return;
-        }
-                                   
-        //Parse the url
-        var requestURL = new URL(event.request.url);
-                                   
-        //Skip admin url's
-        if(requestURL.pathname.indexOf('admin') >= 0 || requestURL.pathname.indexOf('Security') >= 0 || requestURL.pathname.indexOf('dev') >= 0){
-            log('Service worker: skip admin ' + event.request.url);
-            return;
-        }
-        
-        //Test for images
-        if (/\.(jpg|jpeg|png|gif|webp)$/.test(requestURL.pathname)) {
-            log('Service worker: skip image ' + event.request.url);
-            //For now we skip images but change this later to maybe some caching and/or an offline fallback
-            return;
-        }
-        
-        //Check for our own urls
-        if (requestURL.origin == location.origin) {
-            //All our own urls are following this route:
-            //-If there is cache serve from cache but also update the cache from the network
-            //-If there is no cache then get from the network and put in the cache
-            //-If both fail fallback to a generic offline message
-            event.respondWith(caches.match(event.request).then(function (cached) {
-                var networked = fetch(event.request).then(fetchedFromNetwork, unableToResolve).catch(unableToResolve);
-                log('Service worker: fetch event ' + (cached ? '(cached)' : '(network)') + ' - ' + event.request.url);
-                return cached || networked;
-                
-                /**
-                * Fetched from network handler
-                */
-               function fetchedFromNetwork(response) {
-                   var cacheCopy = response.clone();
-                   log('Service worker fetch from network - ' + event.request.url);
-                   caches.open(version + 'pages').then(function add(cache) {
-                       cache.put(event.request, cacheCopy);
-                   }).then(function () {
-                       log('Service worker: fetch response stored in cache - ' + event.request.url);
-                   });
-                   return response;
-               }
-
-               /**
-                * No internet and no cache handler
-                */
-               function unableToResolve(error) {
-                   log('Service worker: fetch request failed in both cache and network ' + error);
-                   return new Response('<h1>Service Unavailable</h1>', {
-                       status: 503,
-                       statusText: 'Service Unavailable',
-                       headers: new Headers({
-                           'Content-Type': 'text/html'
-                       })
-                   });
-               }
-                
-            }));
-            return;
-        }
-        
-        //All others, nothing special here
-        log('Service worker: other url - ' + event.request.url);
-        event.respondWith(caches.match(event.request).then(function(response) {
-            return response || fetch(event.request);
-        }));
-    });
-    //<%--Ugly fix for code highlights</script>--%>

webpack.config.js

@@ -0,0 +1,123 @@
+const SOURCEDIR = './src';
+const COMPRESS = false;
+
+const webpack = require('webpack');
+const path = require('path');
+const filesystem = require('fs');
+
+const HardSourceWebpackPlugin = require('hard-source-webpack-plugin');
+const TerserPlugin = require('terser-webpack-plugin');
+
+const plugins = [
+  new webpack.DefinePlugin({
+    'process.env': {
+      NODE_ENV: JSON.stringify('production'),
+    },
+  }),
+  new HardSourceWebpackPlugin(),
+  new webpack.LoaderOptionsPlugin({
+    minimize: COMPRESS,
+    debug: false,
+  }),
+];
+
+const dirPath = path.resolve(__dirname, 'client/src/');
+const includes = {
+  app: path.join(dirPath, 'app.js'),
+  sw: path.join(dirPath, 'sw.js'),
+};
+
+module.exports = {
+  entry: includes,
+  output: {
+    path: path.resolve(__dirname, 'client', 'dist'),
+    filename: path.join('[name].js'),
+    publicPath: path.resolve(__dirname, 'client', 'dist'),
+  },
+  devtool: COMPRESS ? '' : 'source-map',
+  externals: {},
+  optimization: {
+    namedModules: true,
+    splitChunks: {
+      name: 'vendor',
+      minChunks: 2,
+    },
+    noEmitOnErrors: true,
+    concatenateModules: true,
+    minimizer: COMPRESS
+      ? [
+          new TerserPlugin({
+            terserOptions: {
+              parse: {
+                ecma: 8,
+              },
+              compress: {
+                ecma: 5,
+                warnings: false,
+                comparisons: false,
+              },
+              mangle: {
+                safari10: true,
+              },
+              output: {
+                ecma: 5,
+                comments: false,
+                ascii_only: true,
+              },
+            },
+            parallel: true,
+            cache: true,
+          }),
+        ]
+      : [],
+  },
+  module: {
+    rules: [
+      {
+        test: /\.jsx?$/,
+        use: {
+          loader: 'babel-loader',
+          options: {
+            presets: ['@babel/preset-env'],
+            cacheDirectory: true,
+            cacheCompression: false,
+          },
+        },
+      },
+      {
+        test: /\.worker\.js$/,
+        use: {
+          loader: 'worker-loader',
+        },
+      },
+    ],
+  },
+  resolve: {
+    modules: [
+      path.resolve(__dirname, 'src'),
+      path.resolve(__dirname, 'node_modules'),
+    ],
+  },
+  plugins: plugins,
+
+  devServer: {
+    host: '127.0.0.1',
+    port: 8001,
+    historyApiFallback: true,
+    hot: false,
+    clientLogLevel: 'info',
+    contentBase: [
+      path.resolve(__dirname, 'client/src'),
+      path.resolve(__dirname, 'node_modules'),
+      path.resolve(__dirname, 'client/dist'),
+    ],
+    //watchContentBase: true,
+    overlay: {
+      warnings: true,
+      errors: true,
+    },
+    headers: {
+      'Access-Control-Allow-Origin': '*',
+    },
+  },
+};