notion-rewrite.ts

#!/usr/bin/env -S deno run --allow-read --allow-write

import * as flags from "https://deno.land/std@0.160.0/flags/mod.ts";
import * as fs from "https://deno.land/std@0.160.0/fs/mod.ts";

function hash_decomp(p: string) {
  const i = p.search(/ [a-f0-9]{32}/);
  if (i === -1) {
    return [p, null];
  }
  return [`${p.slice(0, i)}${p.slice(i + 33)}`, p.slice(i + 1, i + 33)];
}

async function hash_collect(p0: string, p1: string): Set<string> {
  let s = new Set();
  const [_, h] = hash_decomp(p1);
  if (h) {
    s.add(h);
  }
  const p = `${p0}/${p1}`;
  const { isDirectory } = await Deno.stat(p);
  if (isDirectory) {
    for await (const { name } of Deno.readDir(p)) {
      s = new Set([...s, ...(await hash_collect(p, name))]);
    }
  }
  return s;
}

function should_rewrite(p: string) {
  for (const ext of ["csv", "md"]) {
    if (p.endsWith(`.${ext}`)) {
      return true;
    }
  }
  return false;
}

async function hash_rewrite(s: Set<string>, p0: string, p1: string) {
  const [p2, h] = hash_decomp(p1);
  let p = `${p0}/${p1}`;
  if (h) {
    if (!s.has(h)) {
      throw new Error(`hash_rewrite ${p}: non-existent hash ${h}`);
    }
    await Deno.rename(p, `${p0}/${p2}`);
    p = `${p0}/${p2}`;
  }
  console.log(p);
  const { isDirectory } = await Deno.stat(p);
  if (isDirectory) {
    for await (const { name } of Deno.readDir(p)) {
      await hash_rewrite(s, p, name);
    }
    return;
  }
  if (should_rewrite(p)) {
    let str = await Deno.readTextFile(p);
    for(const s0 of s) {
      str = str.replaceAll(`%20${s0}`,"");
    }
    await Deno.writeTextFile(p, str);
  }
}

const hashes = await hash_collect("/", "/workspace/deno-playground/tmp.Nx2ow27kGt");
await hash_rewrite(hashes, "/", "/workspace/deno-playground/tmp.Nx2ow27kGt");