bskyPermaLink.user.js

// ==UserScript==
// @name         Bsky Permalink
// @namespace    https://tampermonkey.net/
// @version      2025-05-09
// @description  Permalinks bsky profiles
// @author       Tarrgon
// @match        https://bsky.app/profile/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bsky.app
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

let cache

function addToCache(handle, did) {
  let exists = cache.find(e => e.did == did)
  if (exists) return

  if (cache.length == 500) {
    cache.shift()
  }

  cache.push({ handle, did })

  GM.setValue("cache", JSON.stringify(cache))
}

function getFromCache(handle) {
  return cache.find(e => e.handle == handle)?.did
}

async function getDid(handle) {
  if (handle.startsWith("did:plc:")) return handle
  let cached = getFromCache(handle)

  if (cached) return cached

  let res = await fetch(`https://public.api.bsky.app/xrpc/app.bsky.actor.getProfile?actor=${handle}`)

  let data = await res.json()

  if (data) {
    addToCache(handle, data.did)
    return data.did
  }

  return null
}

async function updateUrl() {
  let prevUrl = window.location.href
  let handle = prevUrl.split("/")[4]
  let did = await getDid(handle)

  if (did) {
    let url = prevUrl.split("/")
    url[4] = did
    window.history.replaceState({}, "", url.join("/"))
  }
}

function observeUrlChange() {
  let oldHref = document.location.href
  const body = document.querySelector("body")
  const observer = new MutationObserver(async () => {
    if (oldHref !== document.location.href) {
      oldHref = document.location.href
      await updateUrl()
    }
  })

  observer.observe(body, { childList: true, subtree: true })
}

(async function () {
  'use strict'

  cache = JSON.parse((await GM.getValue("cache")) || "[]")

  await updateUrl()

  observeUrlChange()
})()