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import { FileTypeCategory } from '$lib/enums';
import { getFileTypeCategory, getFileTypeCategoryByExtension, isImageFile } from '$lib/utils';
export interface AttachmentDisplayItemsOptions {
uploadedFiles?: ChatUploadedFile[];
attachments?: DatabaseMessageExtra[];
}
/**
* Gets the file type category from an uploaded file, checking both MIME type and extension
*/
function getUploadedFileCategory(file: ChatUploadedFile): FileTypeCategory | null {
const categoryByMime = getFileTypeCategory(file.type);
if (categoryByMime) {
return categoryByMime;
}
return getFileTypeCategoryByExtension(file.name);
}
/**
* Creates a unified list of display items from uploaded files and stored attachments.
* Items are returned in reverse order (newest first).
*/
export function getAttachmentDisplayItems(
options: AttachmentDisplayItemsOptions
): ChatAttachmentDisplayItem[] {
const { uploadedFiles = [], attachments = [] } = options;
const items: ChatAttachmentDisplayItem[] = [];
// Add uploaded files (ChatForm)
for (const file of uploadedFiles) {
items.push({
id: file.id,
name: file.name,
size: file.size,
preview: file.preview,
isImage: getUploadedFileCategory(file) === FileTypeCategory.IMAGE,
uploadedFile: file,
textContent: file.textContent
});
}
// Add stored attachments (ChatMessage)
for (const [index, attachment] of attachments.entries()) {
const isImage = isImageFile(attachment);
items.push({
id: `attachment-${index}`,
name: attachment.name,
preview: isImage && 'base64Url' in attachment ? attachment.base64Url : undefined,
isImage,
attachment,
attachmentIndex: index,
textContent: 'content' in attachment ? attachment.content : undefined
});
}
return items.reverse();
}
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