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<script lang="ts">
import { Button } from '$lib/components/ui/button';
import * as Alert from '$lib/components/ui/alert';
import { SyntaxHighlightedCode } from '$lib/components/app';
import { FileText, Image, Music, FileIcon, Eye, Info } from '@lucide/svelte';
import {
isTextFile,
isImageFile,
isPdfFile,
isAudioFile,
getLanguageFromFilename
} from '$lib/utils';
import { convertPDFToImage } from '$lib/utils/browser-only';
import { modelsStore } from '$lib/stores/models.svelte';
interface Props {
// Either an uploaded file or a stored attachment
uploadedFile?: ChatUploadedFile;
attachment?: DatabaseMessageExtra;
// For uploaded files
preview?: string;
name?: string;
textContent?: string;
// For checking vision modality
activeModelId?: string;
}
let { uploadedFile, attachment, preview, name, textContent, activeModelId }: Props = $props();
let hasVisionModality = $derived(
activeModelId ? modelsStore.modelSupportsVision(activeModelId) : false
);
let displayName = $derived(uploadedFile?.name || attachment?.name || name || 'Unknown File');
// Determine file type from uploaded file or attachment
let isAudio = $derived(isAudioFile(attachment, uploadedFile));
let isImage = $derived(isImageFile(attachment, uploadedFile));
let isPdf = $derived(isPdfFile(attachment, uploadedFile));
let isText = $derived(isTextFile(attachment, uploadedFile));
let displayPreview = $derived(
uploadedFile?.preview ||
(isImage && attachment && 'base64Url' in attachment ? attachment.base64Url : preview)
);
let displayTextContent = $derived(
uploadedFile?.textContent ||
(attachment && 'content' in attachment ? attachment.content : textContent)
);
let language = $derived(getLanguageFromFilename(displayName));
let IconComponent = $derived(() => {
if (isImage) return Image;
if (isText || isPdf) return FileText;
if (isAudio) return Music;
return FileIcon;
});
let pdfViewMode = $state<'text' | 'pages'>('pages');
let pdfImages = $state<string[]>([]);
let pdfImagesLoading = $state(false);
let pdfImagesError = $state<string | null>(null);
async function loadPdfImages() {
if (!isPdf || pdfImages.length > 0 || pdfImagesLoading) return;
pdfImagesLoading = true;
pdfImagesError = null;
try {
let file: File | null = null;
if (uploadedFile?.file) {
file = uploadedFile.file;
} else if (isPdf && attachment) {
// Check if we have pre-processed images
if (
'images' in attachment &&
attachment.images &&
Array.isArray(attachment.images) &&
attachment.images.length > 0
) {
pdfImages = attachment.images;
return;
}
// Convert base64 back to File for processing
if ('base64Data' in attachment && attachment.base64Data) {
const base64Data = attachment.base64Data;
const byteCharacters = atob(base64Data);
const byteNumbers = new Array(byteCharacters.length);
for (let i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
file = new File([byteArray], displayName, { type: 'application/pdf' });
}
}
if (file) {
pdfImages = await convertPDFToImage(file);
} else {
throw new Error('No PDF file available for conversion');
}
} catch (error) {
pdfImagesError = error instanceof Error ? error.message : 'Failed to load PDF images';
} finally {
pdfImagesLoading = false;
}
}
export function reset() {
pdfImages = [];
pdfImagesLoading = false;
pdfImagesError = null;
pdfViewMode = 'pages';
}
$effect(() => {
if (isPdf && pdfViewMode === 'pages') {
loadPdfImages();
}
});
</script>
<div class="space-y-4">
<div class="flex items-center justify-end gap-6">
{#if isPdf}
<div class="flex items-center gap-2">
<Button
variant={pdfViewMode === 'text' ? 'default' : 'outline'}
size="sm"
onclick={() => (pdfViewMode = 'text')}
disabled={pdfImagesLoading}
>
<FileText class="mr-1 h-4 w-4" />
Text
</Button>
<Button
variant={pdfViewMode === 'pages' ? 'default' : 'outline'}
size="sm"
onclick={() => {
pdfViewMode = 'pages';
loadPdfImages();
}}
disabled={pdfImagesLoading}
>
{#if pdfImagesLoading}
<div
class="mr-1 h-4 w-4 animate-spin rounded-full border-2 border-current border-t-transparent"
></div>
{:else}
<Eye class="mr-1 h-4 w-4" />
{/if}
Pages
</Button>
</div>
{/if}
</div>
<div class="flex-1 overflow-auto">
{#if isImage && displayPreview}
<div class="flex items-center justify-center">
<img
src={displayPreview}
alt={displayName}
class="max-h-full rounded-lg object-contain shadow-lg"
/>
</div>
{:else if isPdf && pdfViewMode === 'pages'}
{#if !hasVisionModality && activeModelId}
<Alert.Root class="mb-4">
<Info class="h-4 w-4" />
<Alert.Title>Preview only</Alert.Title>
<Alert.Description>
<span class="inline-flex">
The selected model does not support vision. Only the extracted
<!-- svelte-ignore a11y_click_events_have_key_events -->
<!-- svelte-ignore a11y_no_static_element_interactions -->
<span class="mx-1 cursor-pointer underline" onclick={() => (pdfViewMode = 'text')}>
text
</span>
will be sent to the model.
</span>
</Alert.Description>
</Alert.Root>
{/if}
{#if pdfImagesLoading}
<div class="flex items-center justify-center p-8">
<div class="text-center">
<div
class="mx-auto mb-4 h-8 w-8 animate-spin rounded-full border-4 border-primary border-t-transparent"
></div>
<p class="text-muted-foreground">Converting PDF to images...</p>
</div>
</div>
{:else if pdfImagesError}
<div class="flex items-center justify-center p-8">
<div class="text-center">
<FileText class="mx-auto mb-4 h-16 w-16 text-muted-foreground" />
<p class="mb-4 text-muted-foreground">Failed to load PDF images</p>
<p class="text-sm text-muted-foreground">{pdfImagesError}</p>
<Button class="mt-4" onclick={() => (pdfViewMode = 'text')}>View as Text</Button>
</div>
</div>
{:else if pdfImages.length > 0}
<div class="max-h-[70vh] space-y-4 overflow-auto">
{#each pdfImages as image, index (image)}
<div class="text-center">
<p class="mb-2 text-sm text-muted-foreground">Page {index + 1}</p>
<img
src={image}
alt="PDF Page {index + 1}"
class="mx-auto max-w-full rounded-lg shadow-lg"
/>
</div>
{/each}
</div>
{:else}
<div class="flex items-center justify-center p-8">
<div class="text-center">
<FileText class="mx-auto mb-4 h-16 w-16 text-muted-foreground" />
<p class="mb-4 text-muted-foreground">No PDF pages available</p>
</div>
</div>
{/if}
{:else if (isText || (isPdf && pdfViewMode === 'text')) && displayTextContent}
<SyntaxHighlightedCode code={displayTextContent} {language} maxWidth="calc(69rem - 2rem)" />
{:else if isAudio}
<div class="flex items-center justify-center p-8">
<div class="w-full max-w-md text-center">
<Music class="mx-auto mb-4 h-16 w-16 text-muted-foreground" />
{#if uploadedFile?.preview}
<audio controls class="mb-4 w-full" src={uploadedFile.preview}>
Your browser does not support the audio element.
</audio>
{:else if isAudio && attachment && 'mimeType' in attachment && 'base64Data' in attachment}
<audio
controls
class="mb-4 w-full"
src={`data:${attachment.mimeType};base64,${attachment.base64Data}`}
>
Your browser does not support the audio element.
</audio>
{:else}
<p class="mb-4 text-muted-foreground">Audio preview not available</p>
{/if}
<p class="text-sm text-muted-foreground">
{displayName}
</p>
</div>
</div>
{:else}
<div class="flex items-center justify-center p-8">
<div class="text-center">
{#if IconComponent}
<IconComponent class="mx-auto mb-4 h-16 w-16 text-muted-foreground" />
{/if}
<p class="mb-4 text-muted-foreground">Preview not available for this file type</p>
</div>
</div>
{/if}
</div>
</div>
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