feat: implement English Style Converter
- SvelteKit project scaffolded with TypeScript - Type definitions for Style, StyleCategory, ConversionRequest, ConversionResponse, LLMConfig - Style definitions with 6 categories and 25 sub-styles - Intensity mapping (1-5) with prompt modifier placeholders - LLM client using OpenAI-compatible API (Ollama default) - POST /api/convert endpoint with input validation - Animated loading modal with per-letter animations - Main page UI with category/style selectors, intensity slider - Copy to clipboard, collapsible prompt display - Vitest tests for styles, LLM prompt building, and API validation - Environment configuration for LLM settings
This commit is contained in:
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<svg xmlns="http://www.w3.org/2000/svg" width="107" height="128" viewBox="0 0 107 128"><title>svelte-logo</title><path d="M94.157 22.819c-10.4-14.885-30.94-19.297-45.792-9.835L22.282 29.608A29.92 29.92 0 0 0 8.764 49.65a31.5 31.5 0 0 0 3.108 20.231 30 30 0 0 0-4.477 11.183 31.9 31.9 0 0 0 5.448 24.116c10.402 14.887 30.942 19.297 45.791 9.835l26.083-16.624A29.92 29.92 0 0 0 98.235 78.35a31.53 31.53 0 0 0-3.105-20.232 30 30 0 0 0 4.474-11.182 31.88 31.88 0 0 0-5.447-24.116" style="fill:#ff3e00"/><path d="M45.817 106.582a20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.503 18 18 0 0 1 .624-2.435l.49-1.498 1.337.981a33.6 33.6 0 0 0 10.203 5.098l.97.294-.09.968a5.85 5.85 0 0 0 1.052 3.878 6.24 6.24 0 0 0 6.695 2.485 5.8 5.8 0 0 0 1.603-.704L69.27 76.28a5.43 5.43 0 0 0 2.45-3.631 5.8 5.8 0 0 0-.987-4.371 6.24 6.24 0 0 0-6.698-2.487 5.7 5.7 0 0 0-1.6.704l-9.953 6.345a19 19 0 0 1-5.296 2.326 20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.502 17.99 17.99 0 0 1 8.13-12.052l26.081-16.623a19 19 0 0 1 5.3-2.329 20.72 20.72 0 0 1 22.237 8.243 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-.624 2.435l-.49 1.498-1.337-.98a33.6 33.6 0 0 0-10.203-5.1l-.97-.294.09-.968a5.86 5.86 0 0 0-1.052-3.878 6.24 6.24 0 0 0-6.696-2.485 5.8 5.8 0 0 0-1.602.704L37.73 51.72a5.42 5.42 0 0 0-2.449 3.63 5.79 5.79 0 0 0 .986 4.372 6.24 6.24 0 0 0 6.698 2.486 5.8 5.8 0 0 0 1.602-.704l9.952-6.342a19 19 0 0 1 5.295-2.328 20.72 20.72 0 0 1 22.237 8.242 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-8.13 12.053l-26.081 16.622a19 19 0 0 1-5.3 2.328" style="fill:#fff"/></svg>
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Before Width: | Height: | Size: 1.5 KiB |
256
src/lib/components/LoadingModal.svelte
Normal file
256
src/lib/components/LoadingModal.svelte
Normal file
@@ -0,0 +1,256 @@
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<script lang="ts">
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const loadingWords = [
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'Bamboozling',
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'Razzmatazzing',
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'Transmogrifying',
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'Alakazamming',
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'Prestidigitating',
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'Metamorphosizing',
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'Enchanting',
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'Voodooing',
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'Witchcrafting',
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'Sorcerizing',
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'Spellcasting',
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'Hocus-pocusing',
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'Incantating',
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'Conjurating',
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'Charmweaving'
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];
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const colors = [
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'coral',
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'teal',
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'violet',
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'amber',
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'emerald',
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'rose',
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'skyblue',
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'fuchsia',
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'orange',
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'indigo'
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];
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const colorValues: Record<string, string> = {
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coral: '#FF6B6B',
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teal: '#2EC4B6',
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violet: '#9B5DE5',
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amber: '#F5B041',
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emerald: '#2ECC71',
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rose: '#E74C6F',
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skyblue: '#5DADE2',
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fuchsia: '#D63384',
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orange: '#F39C12',
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indigo: '#5B2C6F'
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};
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const animationStyles = [
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'slide-up',
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'bounce-in',
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'drop-in',
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'scale-up',
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'fade-rotate',
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'spring-left'
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];
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let currentWordIndex = $state(0);
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let currentColor = $state(colors[0]);
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let currentAnimation = $state('slide-up');
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let letters = $state<string[]>([]);
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$effect(() => {
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const interval = setInterval(() => {
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currentWordIndex = Math.floor(Math.random() * loadingWords.length);
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currentColor = colors[Math.floor(Math.random() * colors.length)];
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currentAnimation = animationStyles[Math.floor(Math.random() * animationStyles.length)];
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letters = loadingWords[currentWordIndex].split('');
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}, 2000);
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// Initialize immediately
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currentWordIndex = Math.floor(Math.random() * loadingWords.length);
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currentColor = colors[Math.floor(Math.random() * colors.length)];
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currentAnimation = animationStyles[Math.floor(Math.random() * animationStyles.length)];
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letters = loadingWords[currentWordIndex].split('');
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return () => clearInterval(interval);
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});
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</script>
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<div class="modal-overlay" role="dialog" aria-label="Loading">
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<div class="modal-content">
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<div class="loading-letters" style="color: {colorValues[currentColor]}">
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{#each letters as letter, i}
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<span
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class="letter {currentAnimation}"
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style="--delay: {i * 60}ms; --color: {colorValues[currentColor]}"
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>
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{letter}
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</span>
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{/each}
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</div>
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<p class="loading-subtitle">Transforming your text...</p>
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</div>
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</div>
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<style>
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.modal-overlay {
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position: fixed;
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inset: 0;
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background: rgba(255, 255, 255, 0.85);
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backdrop-filter: blur(8px);
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display: flex;
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align-items: center;
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justify-content: center;
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z-index: 1000;
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animation: fade-in 0.2s ease-out;
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}
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.modal-content {
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text-align: center;
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padding: 3rem;
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}
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.loading-letters {
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font-size: clamp(2rem, 5vw, 3.5rem);
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font-weight: 700;
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letter-spacing: 0.05em;
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min-height: 4rem;
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display: flex;
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justify-content: center;
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flex-wrap: wrap;
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}
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.letter {
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display: inline-block;
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opacity: 0;
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animation-fill-mode: forwards;
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animation-duration: 0.4s;
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animation-delay: var(--delay);
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}
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/* Slide up */
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.slide-up {
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animation-name: slide-up;
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}
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@keyframes slide-up {
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from {
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opacity: 0;
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transform: translateY(30px);
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}
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to {
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opacity: 1;
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transform: translateY(0);
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}
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}
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/* Bounce in */
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.bounce-in {
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animation-name: bounce-in;
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}
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@keyframes bounce-in {
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0% {
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opacity: 0;
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transform: translateY(-40px);
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}
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60% {
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opacity: 1;
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transform: translateY(8px);
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}
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100% {
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opacity: 1;
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transform: translateY(0);
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}
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}
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|
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/* Drop in */
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.drop-in {
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animation-name: drop-in;
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}
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@keyframes drop-in {
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0% {
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opacity: 0;
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transform: translateY(-60px);
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}
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70% {
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opacity: 1;
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transform: translateY(4px);
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}
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85% {
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transform: translateY(-2px);
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}
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100% {
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opacity: 1;
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transform: translateY(0);
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}
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}
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/* Scale up */
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.scale-up {
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animation-name: scale-up;
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}
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@keyframes scale-up {
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from {
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opacity: 0;
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transform: scale(0.3);
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}
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to {
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opacity: 1;
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transform: scale(1);
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}
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}
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/* Fade rotate */
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.fade-rotate {
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animation-name: fade-rotate;
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}
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@keyframes fade-rotate {
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from {
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opacity: 0;
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transform: rotate(-15deg) scale(0.5);
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}
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to {
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opacity: 1;
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transform: rotate(0deg) scale(1);
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}
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}
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/* Spring from left */
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.spring-left {
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animation-name: spring-left;
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}
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@keyframes spring-left {
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0% {
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opacity: 0;
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transform: translateX(-40px);
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}
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70% {
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opacity: 1;
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transform: translateX(5px);
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}
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100% {
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opacity: 1;
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transform: translateX(0);
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}
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}
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.loading-subtitle {
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margin-top: 1rem;
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color: #6b7280;
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font-size: 1rem;
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font-weight: 400;
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}
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@keyframes fade-in {
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from {
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opacity: 0;
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}
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to {
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opacity: 1;
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}
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}
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</style>
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34
src/lib/llm.test.ts
Normal file
34
src/lib/llm.test.ts
Normal file
@@ -0,0 +1,34 @@
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import { describe, it, expect } from 'vitest';
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import { buildSystemPrompt, buildUserMessage } from '$lib/llm';
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describe('buildSystemPrompt', () => {
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it('fills in {style} placeholder from intensity instruction', () => {
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const result = buildSystemPrompt(
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'Rewrite in a sarcastic, snarky tone with biting wit',
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'rewrite strongly in a {style} style'
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);
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expect(result).toContain('rewrite strongly in a Rewrite in a sarcastic, snarky tone with biting wit style');
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expect(result).not.toContain('{style}');
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});
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it('includes the style modifier on its own line', () => {
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const result = buildSystemPrompt('some modifier', 'lightly hint at a {style} tone');
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expect(result).toContain('some modifier');
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});
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it('includes the core instruction text', () => {
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const result = buildSystemPrompt('test', 'rewrite with a {style} tone');
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expect(result).toContain('You are an expert English style converter');
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expect(result).toContain('Output ONLY the converted text');
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});
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});
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describe('buildUserMessage', () => {
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it('returns the text as-is', () => {
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expect(buildUserMessage('Hello world')).toBe('Hello world');
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});
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it('preserves whitespace', () => {
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expect(buildUserMessage(' spaced ')).toBe(' spaced ');
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});
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});
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77
src/lib/llm.ts
Normal file
77
src/lib/llm.ts
Normal file
@@ -0,0 +1,77 @@
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import { env } from '$env/dynamic/private';
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import type { LLMConfig } from './types';
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const DEFAULT_CONFIG: LLMConfig = {
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baseUrl: 'http://localhost:11434/v1',
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apiKey: 'ollama',
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model: 'llama3'
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};
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function getConfig(): LLMConfig {
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return {
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baseUrl: env.OPENAI_BASE_URL || DEFAULT_CONFIG.baseUrl,
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apiKey: env.OPENAI_API_KEY || DEFAULT_CONFIG.apiKey,
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model: env.OPENAI_MODEL || DEFAULT_CONFIG.model
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};
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}
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export interface ConvertResult {
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converted: string;
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systemPrompt: string;
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userMessage: string;
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}
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export function buildSystemPrompt(styleModifier: string, intensityInstruction: string): string {
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const intensityFilled = intensityInstruction.replace('{style}', styleModifier);
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return `You are an expert English style converter.
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${intensityFilled}.
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${styleModifier}
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Preserve the core meaning but fully transform the voice and tone.
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Output ONLY the converted text — no explanations, no labels, no quotes.`;
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}
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export function buildUserMessage(text: string): string {
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return text;
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}
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export async function convertText(
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text: string,
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styleModifier: string,
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intensityInstruction: string,
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overrides?: Partial<LLMConfig>
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): Promise<ConvertResult> {
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const merged: LLMConfig = { ...DEFAULT_CONFIG, ...getConfig(), ...overrides };
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const systemPrompt = buildSystemPrompt(styleModifier, intensityInstruction);
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const userMessage = buildUserMessage(text);
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const response = await fetch(`${merged.baseUrl}/chat/completions`, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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Authorization: `Bearer ${merged.apiKey}`
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},
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body: JSON.stringify({
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model: merged.model,
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messages: [
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{ role: 'system', content: systemPrompt },
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{ role: 'user', content: userMessage }
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],
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temperature: 0.8
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})
|
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});
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|
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if (!response.ok) {
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const errorText = await response.text().catch(() => 'Unknown error');
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throw new Error(`LLM request failed (${response.status}): ${errorText}`);
|
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}
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const data = await response.json();
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const converted = data.choices?.[0]?.message?.content?.trim();
|
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|
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if (!converted) {
|
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throw new Error('LLM returned empty response');
|
||||
}
|
||||
|
||||
return { converted, systemPrompt, userMessage };
|
||||
}
|
||||
112
src/lib/styles.test.ts
Normal file
112
src/lib/styles.test.ts
Normal file
@@ -0,0 +1,112 @@
|
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import { describe, it, expect } from 'vitest';
|
||||
import {
|
||||
styles,
|
||||
categories,
|
||||
intensityMap,
|
||||
getStylesByCategory,
|
||||
getStyleById,
|
||||
getCategoryById,
|
||||
getIntensityConfig
|
||||
} from '$lib/styles';
|
||||
|
||||
describe('styles', () => {
|
||||
it('all styles have valid ids', () => {
|
||||
for (const style of styles) {
|
||||
expect(style.id).toBeTruthy();
|
||||
expect(typeof style.id).toBe('string');
|
||||
}
|
||||
});
|
||||
|
||||
it('all styles have valid promptModifiers', () => {
|
||||
for (const style of styles) {
|
||||
expect(style.promptModifier).toBeTruthy();
|
||||
expect(typeof style.promptModifier).toBe('string');
|
||||
expect(style.promptModifier.length).toBeGreaterThan(5);
|
||||
}
|
||||
});
|
||||
|
||||
it('all styles reference existing categories', () => {
|
||||
const categoryIds = new Set(categories.map((c) => c.id));
|
||||
for (const style of styles) {
|
||||
expect(categoryIds.has(style.categoryId)).toBe(true);
|
||||
}
|
||||
});
|
||||
|
||||
it('all style ids are unique', () => {
|
||||
const ids = styles.map((s) => s.id);
|
||||
const uniqueIds = new Set(ids);
|
||||
expect(ids.length).toBe(uniqueIds.size);
|
||||
});
|
||||
});
|
||||
|
||||
describe('getStylesByCategory', () => {
|
||||
it('returns styles for a known category', () => {
|
||||
const result = getStylesByCategory('general');
|
||||
expect(result.length).toBeGreaterThan(0);
|
||||
for (const style of result) {
|
||||
expect(style.categoryId).toBe('general');
|
||||
}
|
||||
});
|
||||
|
||||
it('returns empty array for unknown category', () => {
|
||||
const result = getStylesByCategory('nonexistent');
|
||||
expect(result).toEqual([]);
|
||||
});
|
||||
|
||||
it('general category has 6 styles', () => {
|
||||
const result = getStylesByCategory('general');
|
||||
expect(result.length).toBe(6);
|
||||
});
|
||||
});
|
||||
|
||||
describe('getStyleById', () => {
|
||||
it('returns a style for a valid id', () => {
|
||||
const result = getStyleById('sarcastic');
|
||||
expect(result).toBeDefined();
|
||||
expect(result!.id).toBe('sarcastic');
|
||||
});
|
||||
|
||||
it('returns undefined for unknown id', () => {
|
||||
const result = getStyleById('nonexistent');
|
||||
expect(result).toBeUndefined();
|
||||
});
|
||||
});
|
||||
|
||||
describe('getCategoryById', () => {
|
||||
it('returns a category for a valid id', () => {
|
||||
const result = getCategoryById('general');
|
||||
expect(result).toBeDefined();
|
||||
expect(result!.id).toBe('general');
|
||||
});
|
||||
|
||||
it('returns undefined for unknown id', () => {
|
||||
const result = getCategoryById('nonexistent');
|
||||
expect(result).toBeUndefined();
|
||||
});
|
||||
});
|
||||
|
||||
describe('getIntensityConfig', () => {
|
||||
it('returns config for valid intensity levels 1-5', () => {
|
||||
for (let i = 1; i <= 5; i++) {
|
||||
const config = getIntensityConfig(i);
|
||||
expect(config).toBeDefined();
|
||||
expect(config!.label).toBeTruthy();
|
||||
expect(config!.instruction).toContain('{style}');
|
||||
}
|
||||
});
|
||||
|
||||
it('returns undefined for intensity 0', () => {
|
||||
expect(getIntensityConfig(0)).toBeUndefined();
|
||||
});
|
||||
|
||||
it('returns undefined for intensity 6', () => {
|
||||
expect(getIntensityConfig(6)).toBeUndefined();
|
||||
});
|
||||
|
||||
it('all intensity instructions contain {style} placeholder', () => {
|
||||
for (let i = 1; i <= 5; i++) {
|
||||
const config = getIntensityConfig(i);
|
||||
expect(config!.instruction).toContain('{style}');
|
||||
}
|
||||
});
|
||||
});
|
||||
@@ -40,7 +40,7 @@ export const styles: Style[] = [
|
||||
{ id: 'gen-z', label: 'Gen Z Slang', categoryId: 'fun', promptModifier: 'Rewrite in Gen Z slang with no cap, fr, and modern internet vernacular' },
|
||||
|
||||
// Game of Thrones
|
||||
{ id: 'got-kings-landing', label: "King's Landing", categoryId: 'got', promptModifier: 'Rewrite as a scheming noble from King'\''s Landing would speak' },
|
||||
{ id: 'got-kings-landing', label: "King's Landing", categoryId: 'got', promptModifier: 'Rewrite as a scheming noble from Kings Landing would speak' },
|
||||
{ id: 'got-wildlings', label: 'Wildlings', categoryId: 'got', promptModifier: 'Rewrite in the rough, free-spirited manner of the Free Folk wildlings' },
|
||||
{ id: 'got-winterfell', label: 'Winterfell', categoryId: 'got', promptModifier: 'Rewrite with the honor-bound stoicism of a Stark from Winterfell' },
|
||||
|
||||
|
||||
Reference in New Issue
Block a user