Optimize the file storage structure of the knowledge base (#386)

packages/common/tools/file.ts

@@ -0,0 +1,23 @@
+import { strIsLink } from './str';
+
+export const fileImgs = [
+  { suffix: 'pdf', src: '/imgs/files/pdf.svg' },
+  { suffix: 'csv', src: '/imgs/files/csv.svg' },
+  { suffix: '(doc|docs)', src: '/imgs/files/doc.svg' },
+  { suffix: 'txt', src: '/imgs/files/txt.svg' },
+  { suffix: 'md', src: '/imgs/files/markdown.svg' },
+  { suffix: '.', src: '/imgs/files/file.svg' }
+];
+
+export function getFileIcon(name = '') {
+  return fileImgs.find((item) => new RegExp(item.suffix, 'gi').test(name))?.src;
+}
+export function getSpecialFileIcon(name = '') {
+  if (name === 'manual') {
+    return '/imgs/files/manual.svg';
+  } else if (name === 'mark') {
+    return '/imgs/files/mark.svg';
+  } else if (strIsLink(name)) {
+    return '/imgs/files/link.svg';
+  }
+}

packages/common/tools/str.ts

@@ -0,0 +1,5 @@
+export function strIsLink(str?: string) {
+  if (!str) return false;
+  if (/^((http|https)?:\/\/|www\.|\/)[^\s/$.?#].[^\s]*$/i.test(str)) return true;
+  return false;
+}