Tilføj danskHEADmain

1 files changed, 87 insertions, 31 deletions

diff --git a/src/main.ts b/src/main.ts
index 7961a6f..e419e46 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,5 +1,7 @@
 import './style.css';
-import { defaults, experiments, format, type Experiment, type Parameters } from './experiments';
+import { defaults, experiments, formatDisplay, type Experiment, type Parameters } from './experiments';
+import { getLanguage, languageOptions, setLanguage, t, type Chrome, type Language } from './i18n';
+import { presentLesson } from './i18n/present';
 import { createLab } from './scene/lab';
 import { answerUrl, getTestLesson, testLessons } from './test4';
 import { renderEquation, renderNotation, renderProse } from './math';
@@ -8,8 +10,8 @@ const app = document.querySelector<HTMLDivElement>('#app')!;
 app.innerHTML = `
   <header class="app-header">
     <a class="brand" href="#test-work" aria-label="Field Lab home">E<span>/</span>LAB</a>
-    <div class="header-title"><h1>Electrotechnique & Electrophysics</h1><p>Explore the invisible. Understand the physical.</p></div>
-    <nav class="collections" aria-label="Learning collection"><a href="#test-work" id="test-collection">Test 4 in 3D</a><a href="#field" id="lab-collection">All experiments</a></nav>
+    <div class="header-title"><h1 id="app-title">Electrotechnique & Electrophysics</h1><p>Explore the invisible. Understand the physical.</p></div>
+    <nav class="collections" aria-label="Learning collection"><a href="#test-work" id="test-collection">Test 4 in 3D</a><a href="#field" id="lab-collection">All experiments</a><label class="language-picker"><span id="language-label">Language</span><select id="language" aria-label="Language">${languageOptions.map(option => `<option value="${option.id}">${option.label}</option>`).join('')}</select></label></nav>
   </header>
   <section class="test-overview" id="test-overview"><div><p class="eyebrow">FROM EQUATIONS TO INTUITION</p><h2>Electric energy, made visible.</h2><p>Explore the six questions from Test 4. Change the scene, make a prediction, then follow the derivation.</p></div><div class="test-score"><strong>4A <span>100p</span></strong><strong>4B <span>100p</span></strong><span>6 questions · 3D study guide</span></div></section>
   <nav class="subjects" aria-label="Electrophysics subjects"><div role="tablist" aria-label="Lessons"></div></nav>
@@ -29,7 +31,7 @@ app.innerHTML = `
         <div class="scene-footer"><p id="scene-note"></p><p class="hint">Drag to orbit · Scroll to zoom · Right-drag to pan · Arrow keys to pan when focused</p></div>
       </section>
       <section id="observation-panel" class="observation" aria-label="Connect the scene to the answer"><span class="eyebrow">NOTICE WHAT CHANGES</span><p id="observation" aria-live="polite"></p></section>
-      <section class="learning-panel" aria-label="Learn the physics">
+      <section id="learning-panel" class="learning-panel" aria-label="Learn the physics">
         <div><p class="eyebrow">THE PHYSICS</p><div id="equations" class="equations"></div><p id="explanation"></p><a id="source" target="_blank" rel="noopener noreferrer"></a></div>
         <div class="challenge"><p class="eyebrow">TRY THIS</p><p id="challenge"></p><details><summary>Model & visual scales</summary><p id="limits"></p></details></div>
       </section>
@@ -46,12 +48,54 @@ const lab = createLab(document.querySelector('#viewport')!);
 const allLessons: Experiment[] = [...testLessons, ...experiments];
 const settings = new Map(allLessons.map(experiment => [experiment.id, defaults(experiment)]));
 const byId = (id: string) => document.getElementById(id)!;
+function applyLanguage() {
+  document.documentElement.lang = getLanguage();
+  document.title = t('documentTitle');
+  document.querySelector('meta[name="description"]')?.setAttribute('content', t('metaDescription'));
+  (byId('language') as HTMLSelectElement).value = getLanguage();
+  byId('language').setAttribute('aria-label', t('language'));
+  byId('language-label').textContent = t('language');
+  type CopyKey = { [K in keyof Chrome]: Chrome[K] extends string ? K : never }[keyof Chrome];
+  const set = (id: string, key: CopyKey) => { byId(id).textContent = t(key); };
+  set('test-collection', 'test'); set('lab-collection', 'experiments');
+  set('reset', 'reset'); set('camera-reset', 'camera');
+  set('app-title', 'title');
+  byId('pause').textContent = paused ? t('resume') : t('pause');
+  byId('reveal-prediction').textContent = byId('prediction-answer').hidden ? t('reveal') : t('hide');
+  document.querySelector('.brand')!.setAttribute('aria-label', t('home'));
+  document.querySelector('.header-title p')!.textContent = t('subtitle');
+  document.querySelector('.collections')!.setAttribute('aria-label', t('collection'));
+  document.querySelector('.test-overview .eyebrow')!.textContent = t('overview');
+  document.querySelector('.test-overview h2')!.textContent = t('overviewTitle');
+  document.querySelector('.test-overview > div > p:not(.eyebrow)')!.textContent = t('overviewText');
+  document.querySelector('.test-score > span')!.textContent = t('score');
+  document.querySelector('.subjects')!.setAttribute('aria-label', t('subjects'));
+  document.querySelector('[role="tablist"]')!.setAttribute('aria-label', t('lessons'));
+  byId('test-question').setAttribute('aria-label', t('original'));
+  byId('parameters').setAttribute('aria-label', t('parameters'));
+  byId('measurements').setAttribute('aria-label', t('measurements'));
+  byId('viewport').setAttribute('aria-label', t('viewport'));
+  byId('test-study').setAttribute('aria-label', t('study'));
+  document.querySelector('.scene-toolbar .view-tag')!.textContent = t('view');
+  document.querySelector('.scene-footer .hint')!.textContent = t('hint');
+  document.querySelector('#observation-panel .eyebrow')!.textContent = t('notice');
+  byId('observation-panel').setAttribute('aria-label', t('connect'));
+  document.querySelector('.learning-panel > div:first-child .eyebrow')!.textContent = t('physics');
+  byId('learning-panel').setAttribute('aria-label', t('learn'));
+  document.querySelector('.challenge .eyebrow')!.textContent = t('try');
+  document.querySelector('.challenge summary')!.textContent = t('scales');
+  document.querySelector('.solution-heading .eyebrow')!.textContent = t('build');
+  document.querySelector('.solution-heading h3')!.textContent = t('reasoning');
+  document.querySelector('.solution-heading a')!.textContent = t('originalAnswers');
+  document.querySelector('.prediction .eyebrow')!.textContent = t('predict');
+  document.querySelector('.lesson-pagination')!.setAttribute('aria-label', t('navigation'));
+}
 let active: Experiment = testLessons[0];
 let collection = '';
 const subjects = document.querySelector<HTMLElement>('[role="tablist"]')!;
 let paused = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
 function updatePause() {
-  byId('pause').textContent = paused ? 'Resume animation' : 'Pause animation';
+  byId('pause').textContent = paused ? t('resume') : t('pause');
   byId('pause').setAttribute('aria-pressed', String(paused));
   lab.setPaused(paused);
 }
@@ -62,27 +106,31 @@ function update() {
   const p = parameters();
   for (const control of active.controls) {
     if (control.kind !== 'range') continue;
-    byId(`output-${control.id}`).textContent = `${format(Number(p[control.id]), 3)}${control.unit ? ` ${control.unit}` : ''}`;
+    byId(`output-${control.id}`).textContent = `${formatDisplay(Number(p[control.id]), 3)}${control.unit ? ` ${control.unit}` : ''}`;
   }
   if (active.id === 'semiconductor') {
     (byId('parameter-concentration') as HTMLInputElement).disabled = p.doping === 'intrinsic';
   }
   if (active.id === 'test-central') (byId('parameter-rb') as HTMLInputElement).disabled = p.destination === 'infinity';
   const testLesson = getTestLesson(active);
-  if (testLesson) renderProse(byId('observation'), testLesson.observe(p));
-  byId('measurements').innerHTML = active.measure(p).map(m => `<div class="measurement"><span>${m.label}</span><div><strong aria-label="${m.label}">${m.value}</strong><small>${m.unit}</small></div></div>`).join('');
+  if (testLesson) renderProse(byId('observation'), presentLesson(testLesson).observe(p));
+  byId('measurements').innerHTML = presentLesson(active).measure(p).map(m => `<div class="measurement"><span>${m.label}</span><div><strong aria-label="${m.label}">${m.value}</strong><small>${m.unit}</small></div></div>`).join('');
   byId('measurements').querySelectorAll<HTMLElement>('.measurement > span').forEach(label => renderNotation(label, label.textContent!));
   lab.update(active.id, p);
 }
+let renderedLanguage = '';
 function show(experiment: Experiment) {
   active = experiment;
+  const view = presentLesson(experiment);
   const testLesson = getTestLesson(experiment);
+  const testView = testLesson ? presentLesson(testLesson) : undefined;
   const lessons: Experiment[] = testLesson ? testLessons : experiments;
   const index = lessons.indexOf(experiment);
   const nextCollection = testLesson ? 'test' : 'lab';
-  if (collection !== nextCollection) {
+  if (collection !== nextCollection || renderedLanguage !== getLanguage()) {
     collection = nextCollection;
-    subjects.innerHTML = lessons.map((e, i) => `<button type="button" role="tab" id="tab-${e.id}" aria-controls="lesson" aria-selected="false" tabindex="-1" data-experiment="${e.id}"><span>${String(i + 1).padStart(2, '0')}</span>${e.shortTitle}${getTestLesson(e) ? `<small>${getTestLesson(e)!.points}p</small>` : ''}</button>`).join('');
+    renderedLanguage = getLanguage();
+    subjects.innerHTML = lessons.map((e, i) => `<button type="button" role="tab" id="tab-${e.id}" aria-controls="lesson" aria-selected="false" tabindex="-1" data-experiment="${e.id}"><span>${String(i + 1).padStart(2, '0')}</span>${presentLesson(e).shortTitle}${getTestLesson(e) ? `<small>${getTestLesson(e)!.points}p</small>` : ''}</button>`).join('');
   }
   for (const [id, selected] of [['test-collection', Boolean(testLesson)], ['lab-collection', !testLesson]] as const) {
     if (selected) byId(id).setAttribute('aria-current', 'page');
@@ -92,15 +140,15 @@ function show(experiment: Experiment) {
   byId('test-question').hidden = !testLesson;
   byId('test-study').hidden = !testLesson;
   byId('observation-panel').hidden = !testLesson;
-  byId('lesson-number').textContent = testLesson ? `TEST ${testLesson.section} · QUESTION ${index + 1} · ${testLesson.points} POINTS` : `EXPERIMENT ${String(index + 1).padStart(2, '0')} / 08`;
-  if (testLesson) {
-    byId('test-question').replaceChildren(...testLesson.questions.map((text, i) => {
+  byId('lesson-number').textContent = testView ? t('questionKicker')(testView.section, index + 1, testView.points) : t('experimentKicker')(index + 1, lessons.length);
+  if (testView) {
+    byId('test-question').replaceChildren(...testView.questions.map((text, i) => {
       const paragraph = document.createElement('p');
       renderProse(paragraph, text);
       if (i === 0) paragraph.className = 'question-lead';
       return paragraph;
     }));
-    byId('solution').replaceChildren(...testLesson.answers.map(part => {
+    byId('solution').replaceChildren(...testView.answers.map(part => {
       const details = document.createElement('details');
       const summary = document.createElement('summary');
       renderNotation(summary, part.title);
@@ -115,36 +163,36 @@ function show(experiment: Experiment) {
       details.append(summary, steps);
       return details;
     }));
-    renderProse(byId('prediction-question'), testLesson.prediction);
-    renderProse(byId('prediction-answer'), testLesson.predictionAnswer);
+    renderProse(byId('prediction-question'), testView.prediction);
+    renderProse(byId('prediction-answer'), testView.predictionAnswer);
     byId('prediction-answer').hidden = true;
-    byId('reveal-prediction').textContent = 'Reveal explanation';
+    byId('reveal-prediction').textContent = t('reveal');
     byId('reveal-prediction').setAttribute('aria-expanded', 'false');
     const previous = byId('previous-question') as HTMLAnchorElement;
     const next = byId('next-question') as HTMLAnchorElement;
     previous.hidden = index === 0;
     next.hidden = index === testLessons.length - 1;
-    previous.textContent = '← Previous question';
-    next.textContent = 'Next question →';
+    previous.textContent = t('previous');
+    next.textContent = t('next');
     if (index > 0) previous.href = `#${testLessons[index - 1].id}`;
     if (index < testLessons.length - 1) next.href = `#${testLessons[index + 1].id}`;
     byId('question-progress').textContent = `${index + 1} / 6`;
   }
-  byId('lesson-title').textContent = experiment.title;
-  renderProse(byId('description'), experiment.description);
-  renderProse(byId('scene-note'), experiment.sceneNote);
-  renderProse(byId('explanation'), experiment.explanation);
-  renderProse(byId('challenge'), experiment.challenge);
-  renderProse(byId('limits'), experiment.limits);
-  byId('equations').replaceChildren(...experiment.equations.map(equation => {
+  byId('lesson-title').textContent = view.title;
+  renderProse(byId('description'), view.description);
+  renderProse(byId('scene-note'), view.sceneNote);
+  renderProse(byId('explanation'), view.explanation);
+  renderProse(byId('challenge'), view.challenge);
+  renderProse(byId('limits'), view.limits);
+  byId('equations').replaceChildren(...view.equations.map(equation => {
     const div = document.createElement('p');
     renderEquation(div, equation);
     return div;
   }));
   const source = byId('source') as HTMLAnchorElement;
-  source.textContent = `${experiment.source.title} ↗`;
-  source.href = experiment.source.url;
-  byId('legend').innerHTML = experiment.legend.map(([colour, text]) => `<span><i style="background:${colour}"></i>${text}</span>`).join('');
+  source.textContent = `${view.source.title} ↗`;
+  source.href = view.source.url;
+  byId('legend').innerHTML = view.legend.map(([colour, text]) => `<span><i style="background:${colour}"></i>${text}</span>`).join('');
   byId('lesson').setAttribute('aria-labelledby', `tab-${experiment.id}`);
   document.querySelectorAll<HTMLButtonElement>('[role="tab"]').forEach(tab => {
     const selected = tab.dataset.experiment === experiment.id;
@@ -152,7 +200,7 @@ function show(experiment: Experiment) {
     tab.tabIndex = selected ? 0 : -1;
   });
   const p = parameters();
-  byId('parameters').innerHTML = experiment.controls.map(control => {
+  byId('parameters').innerHTML = view.controls.map(control => {
     const id = `parameter-${control.id}`;
     if (control.kind === 'select') return `<div class="parameter"><label for="${id}">${control.label}</label><select id="${id}" name="${control.id}">${control.options.map(option => `<option value="${option.value}" ${option.value === p[control.id] ? 'selected' : ''}>${option.label}</option>`).join('')}</select></div>`;
     return `<div class="parameter"><div class="parameter-label"><label for="${id}">${control.label}</label><output for="${id}" id="output-${control.id}"></output></div><input id="${id}" name="${control.id}" type="range" min="${control.min}" max="${control.max}" step="${control.step}" value="${p[control.id]}" /></div>`;
@@ -184,6 +232,14 @@ const onHashChange = () => {
 };
 window.addEventListener('hashchange', onHashChange);
 fromHash();
+applyLanguage();
+byId('language').addEventListener('change', event => {
+  const next = (event.target as HTMLSelectElement).value;
+  if (next !== 'en' && next !== 'da') return;
+  setLanguage(next as Language);
+  applyLanguage();
+  show(active);
+});
 byId('parameters').addEventListener('input', event => {
   const input = event.target as HTMLInputElement | HTMLSelectElement;
   if (!input.name) return;
@@ -203,7 +259,7 @@ byId('reveal-prediction').addEventListener('click', () => {
   const reveal = byId('prediction-answer').hidden;
   byId('prediction-answer').hidden = !reveal;
   byId('reveal-prediction').setAttribute('aria-expanded', String(reveal));
-  byId('reveal-prediction').textContent = reveal ? 'Hide explanation' : 'Reveal explanation';
+  byId('reveal-prediction').textContent = reveal ? t('hide') : t('reveal');
 });
 subjects.addEventListener('click', event => {
   const tab = (event.target as HTMLElement).closest<HTMLButtonElement>('[data-experiment]');