SvelteKit-based WebUI (#14839)

tools/server/webui/src/stories/ChatMessage.stories.svelte

@@ -0,0 +1,146 @@
+<script module lang="ts">
+	import { defineMeta } from '@storybook/addon-svelte-csf';
+	import ChatMessage from '$lib/components/app/chat/ChatMessages/ChatMessage.svelte';
+
+	const { Story } = defineMeta({
+		title: 'Components/ChatScreen/ChatMessage',
+		component: ChatMessage,
+		parameters: {
+			layout: 'centered'
+		}
+	});
+
+	// Mock messages for different scenarios
+	const userMessage: DatabaseMessage = {
+		id: '1',
+		convId: 'conv-1',
+		type: 'message',
+		timestamp: Date.now() - 1000 * 60 * 5,
+		role: 'user',
+		content: 'What is the meaning of life, the universe, and everything?',
+		parent: '',
+		thinking: '',
+		children: []
+	};
+
+	const assistantMessage: DatabaseMessage = {
+		id: '2',
+		convId: 'conv-1',
+		type: 'message',
+		timestamp: Date.now() - 1000 * 60 * 3,
+		role: 'assistant',
+		content:
+			'The answer to the ultimate question of life, the universe, and everything is **42**.\n\nThis comes from Douglas Adams\' "The Hitchhiker\'s Guide to the Galaxy," where a supercomputer named Deep Thought calculated this answer over 7.5 million years. However, the question itself was never properly formulated, which is why the answer seems meaningless without context.',
+		parent: '1',
+		thinking: '',
+		children: []
+	};
+
+	let processingMessage = $state({
+		id: '4',
+		convId: 'conv-1',
+		type: 'message',
+		timestamp: 0, // No timestamp = processing
+		role: 'assistant',
+		content: '',
+		parent: '1',
+		thinking: '',
+		children: []
+	});
+
+	let streamingMessage = $state({
+		id: '5',
+		convId: 'conv-1',
+		type: 'message',
+		timestamp: 0, // No timestamp = streaming
+		role: 'assistant',
+		content: '',
+		parent: '1',
+		thinking: '',
+		children: []
+	});
+</script>
+
+<Story
+	name="User"
+	args={{
+		message: userMessage
+	}}
+/>
+
+<Story
+	name="Assistant"
+	args={{
+		class: 'max-w-[56rem] w-[calc(100vw-2rem)]',
+		message: assistantMessage
+	}}
+/>
+
+<Story
+	name="WithThinkingBlock"
+	args={{
+		message: streamingMessage
+	}}
+	asChild
+	play={async () => {
+		// Phase 1: Stream reasoning content in chunks
+		let reasoningText =
+			'I need to think about this carefully. Let me break down the problem:\n\n1. The user is asking for help with something complex\n2. I should provide a thorough and helpful response\n3. I need to consider multiple approaches\n4. The best solution would be to explain step by step\n\nThis approach will ensure clarity and understanding.';
+
+		let reasoningChunk = 'I';
+		let i = 0;
+		while (i < reasoningText.length) {
+			const chunkSize = Math.floor(Math.random() * 5) + 3; // Random 3-7 characters
+			const chunk = reasoningText.slice(i, i + chunkSize);
+			reasoningChunk += chunk;
+
+			// Update the reactive state directly
+			streamingMessage.thinking = reasoningChunk;
+
+			i += chunkSize;
+			await new Promise((resolve) => setTimeout(resolve, 50));
+		}
+
+		const regularText =
+			"Based on my analysis, here's the solution:\n\n**Step 1:** First, we need to understand the requirements clearly.\n\n**Step 2:** Then we can implement the solution systematically.\n\n**Step 3:** Finally, we test and validate the results.\n\nThis approach ensures we cover all aspects of the problem effectively.";
+
+		let contentChunk = '';
+		i = 0;
+
+		while (i < regularText.length) {
+			const chunkSize = Math.floor(Math.random() * 5) + 3; // Random 3-7 characters
+			const chunk = regularText.slice(i, i + chunkSize);
+			contentChunk += chunk;
+
+			// Update the reactive state directly
+			streamingMessage.content = contentChunk;
+
+			i += chunkSize;
+			await new Promise((resolve) => setTimeout(resolve, 50));
+		}
+
+		streamingMessage.timestamp = Date.now();
+	}}
+>
+	<div class="w-[56rem]">
+		<ChatMessage message={streamingMessage} />
+	</div>
+</Story>
+
+<Story
+	name="Processing"
+	args={{
+		message: processingMessage
+	}}
+	play={async () => {
+		// Import the chat store to simulate loading state
+		const { chatStore } = await import('$lib/stores/chat.svelte');
+		
+		// Set loading state to true to trigger the processing UI
+		chatStore.isLoading = true;
+		
+		// Simulate the processing state hook behavior
+		// This will show the "Generating..." text and parameter details
+		await new Promise(resolve => setTimeout(resolve, 100));
+	}}
+/>