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<script lang="ts">
import { goto, replaceState } from '$app/navigation';
import { page } from '$app/state';
import { afterNavigate } from '$app/navigation';
import { ChatScreen, DialogModelNotAvailable } from '$lib/components/app';
import { chatStore, isLoading } from '$lib/stores/chat.svelte';
import {
conversationsStore,
activeConversation,
activeMessages
} from '$lib/stores/conversations.svelte';
import { modelsStore, modelOptions, selectedModelId } from '$lib/stores/models.svelte';
let chatId = $derived(page.params.id);
let currentChatId: string | undefined = undefined;
// URL parameters for prompt and model selection
let qParam = $derived(page.url.searchParams.get('q'));
let modelParam = $derived(page.url.searchParams.get('model'));
// Dialog state for model not available error
let showModelNotAvailable = $state(false);
let requestedModelName = $state('');
let availableModelNames = $derived(modelOptions().map((m) => m.model));
// Track if URL params have been processed for this chat
let urlParamsProcessed = $state(false);
/**
* Clear URL params after message is sent to prevent re-sending on refresh
*/
function clearUrlParams() {
const url = new URL(page.url);
url.searchParams.delete('q');
url.searchParams.delete('model');
replaceState(url.toString(), {});
}
async function handleUrlParams() {
// Ensure models are loaded first
await modelsStore.fetch();
// Handle model parameter - select model if provided
if (modelParam) {
const model = modelsStore.findModelByName(modelParam);
if (model) {
try {
await modelsStore.selectModelById(model.id);
} catch (error) {
console.error('Failed to select model:', error);
requestedModelName = modelParam;
showModelNotAvailable = true;
return;
}
} else {
// Model not found - show error dialog
requestedModelName = modelParam;
showModelNotAvailable = true;
return;
}
}
// Handle ?q= parameter - send message in current conversation
if (qParam !== null) {
await chatStore.sendMessage(qParam);
// Clear URL params after message is sent
clearUrlParams();
} else if (modelParam) {
// Clear params even if no message was sent (just model selection)
clearUrlParams();
}
urlParamsProcessed = true;
}
async function selectModelFromLastAssistantResponse() {
const messages = activeMessages();
if (messages.length === 0) return;
let lastMessageWithModel: DatabaseMessage | undefined;
for (let i = messages.length - 1; i >= 0; i--) {
if (messages[i].model) {
lastMessageWithModel = messages[i];
break;
}
}
if (!lastMessageWithModel) return;
const currentModelId = selectedModelId();
const currentModelName = modelOptions().find((m) => m.id === currentModelId)?.model;
if (currentModelName === lastMessageWithModel.model) {
return;
}
const matchingModel = modelOptions().find(
(option) => option.model === lastMessageWithModel.model
);
if (matchingModel) {
try {
await modelsStore.selectModelById(matchingModel.id);
console.log(`Automatically loaded model: ${lastMessageWithModel.model} from last message`);
} catch (error) {
console.warn('Failed to automatically select model from last message:', error);
}
}
}
afterNavigate(() => {
setTimeout(() => {
selectModelFromLastAssistantResponse();
}, 100);
});
$effect(() => {
if (chatId && chatId !== currentChatId) {
currentChatId = chatId;
urlParamsProcessed = false; // Reset for new chat
// Skip loading if this conversation is already active (e.g., just created)
if (activeConversation()?.id === chatId) {
// Still handle URL params even if conversation is active
if ((qParam !== null || modelParam !== null) && !urlParamsProcessed) {
handleUrlParams();
}
return;
}
(async () => {
const success = await conversationsStore.loadConversation(chatId);
if (success) {
chatStore.syncLoadingStateForChat(chatId);
// Handle URL params after conversation is loaded
if ((qParam !== null || modelParam !== null) && !urlParamsProcessed) {
await handleUrlParams();
}
} else {
await goto('#/');
}
})();
}
});
$effect(() => {
if (typeof window !== 'undefined') {
const handleBeforeUnload = () => {
if (isLoading()) {
console.log('Page unload detected while streaming - aborting stream');
chatStore.stopGeneration();
}
};
window.addEventListener('beforeunload', handleBeforeUnload);
return () => {
window.removeEventListener('beforeunload', handleBeforeUnload);
};
}
});
</script>
<svelte:head>
<title>{activeConversation()?.name || 'Chat'} - llama.cpp</title>
</svelte:head>
<ChatScreen />
<DialogModelNotAvailable
bind:open={showModelNotAvailable}
modelName={requestedModelName}
availableModels={availableModelNames}
/>
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