rm unused sharp code

packages/pds/src/image/index.ts

@@ -1,2 +1,80 @@
-export * from './sharp'
-export type { Options, ImageInfo } from './util'
+import { Readable } from 'stream'
+import { pipeline } from 'stream/promises'
+import sharp from 'sharp'
+import { errHasMsg } from '@atproto/common'
+
+export async function maybeGetInfo(
+  stream: Readable,
+): Promise<ImageInfo | null> {
+  let metadata: sharp.Metadata
+  try {
+    const processor = sharp()
+    const [result] = await Promise.all([
+      processor.metadata(),
+      pipeline(stream, processor), // Handles error propagation
+    ])
+    metadata = result
+  } catch (err) {
+    if (errHasMsg(err, 'Input buffer contains unsupported image format')) {
+      return null
+    }
+    throw err
+  }
+  const { size, height, width, format } = metadata
+  if (
+    size === undefined ||
+    height === undefined ||
+    width === undefined ||
+    format === undefined
+  ) {
+    return null
+  }
+
+  return {
+    height,
+    width,
+    size,
+    mime: formatsToMimes[format] ?? ('unknown' as const),
+  }
+}
+
+export async function getInfo(stream: Readable): Promise<ImageInfo> {
+  const maybeInfo = await maybeGetInfo(stream)
+  if (!maybeInfo) {
+    throw new Error('could not obtain all image metadata')
+  }
+  return maybeInfo
+}
+
+export type Options = Dimensions & {
+  format: 'jpeg' | 'png'
+  // When 'cover' (default), scale to fill given dimensions, cropping if necessary.
+  // When 'inside', scale to fit within given dimensions.
+  fit?: 'cover' | 'inside'
+  // When false (default), do not scale up.
+  // When true, scale up to hit dimensions given in options.
+  // Otherwise, scale up to hit specified min dimensions.
+  min?: Dimensions | boolean
+  // A number 1-100
+  quality?: number
+}
+
+export type ImageInfo = Dimensions & {
+  size: number
+  mime: `image/${string}` | 'unknown'
+}
+
+export type Dimensions = { height: number; width: number }
+
+export const formatsToMimes: {
+  [s in keyof sharp.FormatEnum]?: `image/${string}`
+} = {
+  jpg: 'image/jpeg',
+  jpeg: 'image/jpeg',
+  png: 'image/png',
+  gif: 'image/gif',
+  svg: 'image/svg+xml',
+  tif: 'image/tiff',
+  tiff: 'image/tiff',
+  webp: 'image/webp',
+}