initial version

src/lib/files.ts

@@ -0,0 +1,67 @@
+import fs from 'fs'
+import path from 'path'
+import type { DirectoryListing, FileEntry, MediaType } from '@/types'
+
+const HIDDEN_FILES = /^\./
+
+const VIDEO_EXTENSIONS = new Set(['.mp4', '.mov', '.mkv', '.avi', '.webm', '.m4v'])
+const IMAGE_EXTENSIONS = new Set(['.jpg', '.jpeg', '.png', '.gif', '.webp', '.bmp', '.tiff', '.tif'])
+
+function getMediaType(filename: string): MediaType {
+  const ext = path.extname(filename).toLowerCase()
+  if (VIDEO_EXTENSIONS.has(ext)) return 'video'
+  if (IMAGE_EXTENSIONS.has(ext)) return 'image'
+  return 'other'
+}
+
+function fileApiUrl(libraryId: string, relativePath: string): string {
+  return `/api/file?libraryId=${encodeURIComponent(libraryId)}&path=${encodeURIComponent(relativePath)}`
+}
+
+export function scanDirectory(
+  libraryRoot: string,
+  libraryId: string,
+  subpath: string
+): DirectoryListing {
+  const absPath = subpath
+    ? path.resolve(libraryRoot, subpath)
+    : libraryRoot
+
+  let dirents: fs.Dirent[]
+  try {
+    dirents = fs.readdirSync(absPath, { withFileTypes: true })
+  } catch {
+    return { path: subpath, entries: [] }
+  }
+
+  const entries: FileEntry[] = dirents
+    .filter((d) => !HIDDEN_FILES.test(d.name))
+    .map((d): FileEntry => {
+      if (d.isDirectory()) {
+        return {
+          name: d.name,
+          type: 'directory',
+          mediaType: null,
+          url: null,
+        }
+      }
+
+      const relPath = subpath ? path.join(subpath, d.name) : d.name
+      const mediaType = getMediaType(d.name)
+
+      return {
+        name: d.name,
+        type: 'file',
+        mediaType,
+        url: fileApiUrl(libraryId, relPath),
+      }
+    })
+
+  // Sort: directories first, then files; each group sorted alphabetically
+  entries.sort((a, b) => {
+    if (a.type !== b.type) return a.type === 'directory' ? -1 : 1
+    return a.name.localeCompare(b.name)
+  })
+
+  return { path: subpath, entries }
+}