refactor: rename shared package to core (#24309)

packages/shared/src/util/encode.ts

@@ -1,51 +0,0 @@
-export function base64Encode(value: string) {
-  const bytes = new TextEncoder().encode(value)
-  const binary = Array.from(bytes, (b) => String.fromCharCode(b)).join("")
-  return btoa(binary).replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "")
-}
-
-export function base64Decode(value: string) {
-  const binary = atob(value.replace(/-/g, "+").replace(/_/g, "/"))
-  const bytes = Uint8Array.from(binary, (c) => c.charCodeAt(0))
-  return new TextDecoder().decode(bytes)
-}
-
-export async function hash(content: string, algorithm = "SHA-256"): Promise<string> {
-  const encoder = new TextEncoder()
-  const data = encoder.encode(content)
-  const hashBuffer = await crypto.subtle.digest(algorithm, data)
-  const hashArray = Array.from(new Uint8Array(hashBuffer))
-  const hashHex = hashArray.map((b) => b.toString(16).padStart(2, "0")).join("")
-  return hashHex
-}
-
-export function checksum(content: string): string | undefined {
-  if (!content) return undefined
-  let hash = 0x811c9dc5
-  for (let i = 0; i < content.length; i++) {
-    hash ^= content.charCodeAt(i)
-    hash = Math.imul(hash, 0x01000193)
-  }
-  return (hash >>> 0).toString(36)
-}
-
-export function sampledChecksum(content: string, limit = 500_000): string | undefined {
-  if (!content) return undefined
-  if (content.length <= limit) return checksum(content)
-
-  const size = 4096
-  const points = [
-    0,
-    Math.floor(content.length * 0.25),
-    Math.floor(content.length * 0.5),
-    Math.floor(content.length * 0.75),
-    content.length - size,
-  ]
-  const hashes = points
-    .map((point) => {
-      const start = Math.max(0, Math.min(content.length - size, point - Math.floor(size / 2)))
-      return checksum(content.slice(start, start + size)) ?? ""
-    })
-    .join(":")
-  return `${content.length}:${hashes}`
-}