forked from tools/doomsday
475 lines
15 KiB
HTML
475 lines
15 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="author" content="Felix W. Dekker" />
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<meta name="application-name" content="Converter" />
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<meta name="description" content="Converts numbers to and from various bases." />
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<meta name="theme-color" content="#0033cc" />
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<title>Doomsday | FWDekker</title>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300italic,700,700italic"
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crossorigin="anonymous" />
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css"
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integrity="sha256-l85OmPOjvil/SOvVt3HnSSjzF1TUMyT9eV0c2BzEGzU=" crossorigin="anonymous" />
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/milligram/1.3.0/milligram.min.css"
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integrity="sha256-Ro/wP8uUi8LR71kwIdilf78atpu8bTEwrK5ZotZo+Zc=" crossorigin="anonymous" />
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<link rel="stylesheet" href="https://static.fwdekker.com/css/milligram-common.css" crossorigin="anonymous" />
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<style>
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:root {
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--error-color: red;
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--success-color: green;
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}
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.row .column.quiz-button-column {
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display: flex;
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align-items: flex-end;
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}
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.row .column.quiz-button-column .quiz-button {
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margin-bottom: 15px;
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}
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.success-message {
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color: var(--success-color);
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}
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.error-message {
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color: var(--error-color);
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}
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.success-box {
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background-color: var(--success-color);
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border-color: var(--success-color);
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}
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.error-box {
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background-color: var(--error-color);
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border-color: var(--error-color);
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}
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input[data-entered=true]:valid {
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border-color: var(--success-color);
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color: var(--success-color);
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}
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input[data-entered=true]:invalid {
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border-color: var(--error-color);
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color: var(--error-color);
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}
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</style>
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</head>
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<body>
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<main class="wrapper">
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<!-- Header -->
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<header class="header">
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<section class="container">
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<h1>Doomsday</h1>
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<blockquote>
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<p><em>
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Test your mastery of <a href="https://en.wikipedia.org/wiki/Doomsday_rule">Conway's Doomsday</a>
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rule.
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</em></p>
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</blockquote>
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</section>
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</header>
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<!-- Input -->
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<section class="container">
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<form>
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<div class="row">
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<div class="column column-90">
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<label for="century-input" id="century-title-label">Century</label>
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<input type="text" id="century-input" autocomplete="off" autofocus />
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</div>
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<div class="column column-10 quiz-button-column">
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<button type="button" class="quiz-button" id="century-submit">Check</button>
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</div>
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</div>
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<div class="row">
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<div class="column column-90">
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<label for="year-input" id="year-title-label">Year</label>
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<input type="text" id="year-input" autocomplete="off" />
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</div>
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<div class="column column-10 quiz-button-column">
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<button type="button" class="quiz-button" id="year-submit">Check</button>
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</div>
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</div>
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<div class="row">
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<div class="column column-90">
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<label for="day-input" id="day-title-label">Day</label>
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<input type="text" id="day-input" autocomplete="off" />
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</div>
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<div class="column column-10 quiz-button-column">
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<button type="button" class="quiz-button" id="day-submit">Check</button>
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</div>
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</div>
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<div class="row">​</div>
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<div class="row">
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<div class="column">
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<button type="button" id="reset-button">Reset</button>
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</div>
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</div>
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</form>
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</section>
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<!-- Footer -->
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<footer class="footer">
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<section class="container">
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Made by <a href="https://fwdekker.com/">Felix W. Dekker</a>.
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Licensed under the
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<a href="https://git.fwdekker.com/FWDekker/doomsday/src/branch/master/LICENSE">MIT License</a>.
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Source code available on <a href="https://git.fwdekker.com/FWDekker/doomsday/">git</a>.
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</section>
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</footer>
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</main>
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<!-- Scripts -->
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<script src="https://static.fwdekker.com/js/common.js" crossorigin="anonymous"></script>
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<script>
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/**
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* Returns a number between `min` (inclusive) and `max` (inclusive).
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*
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* @param min the lower bound of permissible values
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* @param max the upper bound of permissible values
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*/
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function generateRandom(min, max) {
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return Math.floor(Math.random() * (max - min + 1) + min);
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}
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/**
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* An input that can be validated.
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*
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* In particular, the century, year, and day inputs of the Doomsday test.
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*/
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class ValidatableInput {
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/**
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* Constructs a new validatable input and registers event listeners.
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*
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* @param input the input that is validatable
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* @param titleLabel the label with the `labelFor` property for the input given as the first parameter
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* @param button the submission button that activates validation
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*/
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constructor(input, titleLabel, button) {
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this.input = input;
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this.titleLabel = titleLabel;
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this.button = button;
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this.button.addEventListener("click", () => this.onSubmit());
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this.input.addEventListener("keydown", event => {
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if (event.key !== "Enter")
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return;
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this.onSubmit();
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event.preventDefault();
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});
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}
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/**
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* Handles the user submitting the input.
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*/
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onSubmit() {
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this.input.dataset["entered"] = "true";
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if (this.isValid(this.input.value)) {
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this.showSuccess();
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this.onValidInput();
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} else {
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this.showError();
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this.selectInput();
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this.onInvalidInput();
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}
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}
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/**
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* Returns `true` if and only if the input is valid.
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*
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* This method **must** be implemented by subclasses.
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*
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* @param value the value of the input to validate
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*/
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isValid(value) {
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throw new Error("Implement this method.");
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}
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/**
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* Runs when the user submits a valid input.
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*
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* This method **must** be implemented by subclasses.
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*/
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onValidInput() {
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throw new Error("Implement this method.");
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}
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/**
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* Runs when a user submits an invalid input.
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*
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* This method **must** be implemented by subclasses.
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*/
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onInvalidInput() {
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throw new Error("Implement this method.");
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}
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/**
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* Resets the input, title, and error message to their initial state, and removes the value from the input.
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*/
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reset() {
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this.input.value = "";
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this.input.dataset["entered"] = "false";
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this.showSuccess();
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this.updateTitle();
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this.titleLabel.classList.remove("success-message");
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this.button.classList.remove("success-box");
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}
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/**
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* Marks the input as invalid.
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*/
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showError() {
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this.input.setCustomValidity("Incorrect");
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this.titleLabel.classList.remove("success-message");
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this.titleLabel.classList.add("error-message");
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this.button.classList.remove("success-box");
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this.button.classList.add("error-box");
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}
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/**
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* Marks the input as valid.
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*/
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showSuccess() {
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this.input.setCustomValidity("");
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this.titleLabel.classList.remove("error-message");
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this.titleLabel.classList.add("success-message");
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this.button.classList.remove("error-box");
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this.button.classList.add("success-box");
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}
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/**
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* Updates the title label's contents.
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*
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* Does nothing by default. Implement this method to make it do something.
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*/
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updateTitle() {
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// Do nothing
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}
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/**
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* Focuses the input element.
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*/
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selectInput() {
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this.input.select();
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}
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}
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/**
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* A wrapper around the good ol' `Date` class that provides a bunch of useful Doomsday-specific methods.
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*/
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class DoomsdayDate {
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/**
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* Wraps a `DoomsdayDate` around the given `Date`.
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*
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* @param date the `Date` to be wrapped
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*/
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constructor(date) {
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this.date = date;
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}
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/**
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* Returns the number of this `DoomsdayDate`'s century.
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*/
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getCentury() {
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return Math.floor(this.date.getFullYear() / 100);
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}
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/**
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* Returns the day of the week of the anchor of this `DoomsdayDate`'s century as a string.
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*/
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getCenturyAnchorString() {
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const centuryAnchorNumber = (5 * (this.getCentury() % 4)) % 7 + 2;
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return DoomsdayDate.dayNumberToString(centuryAnchorNumber);
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};
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/**
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* Returns the day of the week of the anchor day of this `DoomsdayDate`'s year as a string.
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*/
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getYearAnchorString() {
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const anchorDate = new Date(this.date);
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anchorDate.setMonth(3); // April
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anchorDate.setDate(4); // 4th
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return DoomsdayDate.dayNumberToString(anchorDate.getDay());
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};
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/**
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* Returns the day of the week of this `DoomsdayDate` as a string.
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*/
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getWeekdayString() {
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return DoomsdayDate.dayNumberToString(this.date.getDay());
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};
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/**
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* Returns the name of the day given its 0-based index, where 0 is `Sunday`.
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*
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* @param dayNumber the number of the day, as returned by `Date`'s `#getDay` function.
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*/
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static dayNumberToString(dayNumber) {
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switch (dayNumber % 7) {
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case 0:
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return "Sunday";
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case 1:
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return "Monday";
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case 2:
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return "Tuesday";
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case 3:
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return "Wednesday";
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case 4:
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return "Thursday";
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case 5:
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return "Friday";
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case 6:
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return "Saturday";
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}
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};
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/**
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* Returns the day of the week corresponding to the given string.
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*
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* This is a convenience method for interpreting (incomplete) user inputs.
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*
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* @param dayString the day of the week to expand
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*/
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static expandDayString(dayString) {
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dayString = dayString.toLowerCase();
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if (dayString.startsWith("m"))
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return "Monday";
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else if (dayString.startsWith("tu"))
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return "Tuesday";
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else if (dayString.startsWith("w"))
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return "Wednesday";
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else if (dayString.startsWith("th"))
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return "Thursday";
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else if (dayString.startsWith("f"))
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return "Friday";
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else if (dayString.startsWith("sa"))
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return "Saturday";
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else if (dayString.startsWith("su"))
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return "Sunday";
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else
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return undefined;
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}
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/**
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* Returns a random date in the range `0001-01-01` (inclusive) to `9999-12-31` (inclusive), wrapped inside a
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* `DoomsdayDate` object.
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*/
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static random() {
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// TODO Give custom dates to this method
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const minDate = new Date("0001-01-01").getTime() / 86400000;
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const maxDate = new Date("9999-12-31").getTime() / 86400000;
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return new DoomsdayDate(new Date(generateRandom(minDate, maxDate) * 86400000));
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}
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}
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doAfterLoad(() => {
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let quizDate;
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const centuryInput = new class extends ValidatableInput {
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isValid(value) {
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return DoomsdayDate.expandDayString(value) === quizDate.getCenturyAnchorString();
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}
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onValidInput() {
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this.input.value = DoomsdayDate.expandDayString(this.input.value);
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yearInput.selectInput();
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}
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onInvalidInput() {
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// Do nothing
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}
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updateTitle() {
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this.titleLabel.innerText = `Anchor day of century starting in ${quizDate.getCentury() * 100}?`;
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}
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}($("#century-input"), $("#century-title-label"), $("#century-submit"));
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const yearInput = new class extends ValidatableInput {
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isValid(value) {
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return DoomsdayDate.expandDayString(value) === quizDate.getYearAnchorString();
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}
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onValidInput() {
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this.input.value = DoomsdayDate.expandDayString(this.input.value);
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dayInput.selectInput();
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}
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onInvalidInput() {
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// Do nothing
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}
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updateTitle() {
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this.titleLabel.innerText = `Doomsday of year ${quizDate.date.getFullYear()}?`;
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}
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}($("#year-input"), $("#year-title-label"), $("#year-submit"));
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const dayInput = new class extends ValidatableInput {
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isValid(value) {
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return DoomsdayDate.expandDayString(value) === quizDate.getWeekdayString();
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}
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onValidInput() {
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this.input.value = DoomsdayDate.expandDayString(this.input.value);
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resetButton.focus();
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}
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onInvalidInput() {
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// Do nothing
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}
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updateTitle() {
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this.titleLabel.innerText = `Weekday of ${quizDate.date.toISOString().substr(0, 10)}?`;
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}
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}($("#day-input"), $("#day-title-label"), $("#day-submit"));
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const resetButton = $("#reset-button");
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resetButton.addEventListener("click", () => reloadQuiz());
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/**
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* Generates a new date for the quiz and resets the inputs to reflect this.
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*/
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function reloadQuiz() {
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quizDate = DoomsdayDate.random();
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centuryInput.reset();
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yearInput.reset();
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dayInput.reset();
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centuryInput.selectInput();
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}
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// Let the fun begin
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reloadQuiz();
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});
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</script>
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</body>
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</html>
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