booru-implications-helper.user.js

// ==UserScript==
// @name        Booru Implications Helper
// @namespace   Booru Scripts
// @match       https://derpibooru.org/*
// @match       https://trixiebooru.org/*
// @match       https://furbooru.org/*
// @match       https://tantabus.ai/*
// @grant       none
// @version     1.0.1
// @author      mdashlw
// @description 3/29/2025
// @updateURL   https://gist.github.com/mdashlw/a6c66e7681f6502b9118af8e2dcbd85b/raw/booru-implications-helper.user.js
// @downloadURL https://gist.github.com/mdashlw/a6c66e7681f6502b9118af8e2dcbd85b/raw/booru-implications-helper.user.js
// ==/UserScript==

const target = document
  .getElementById("tag_implied_tag_list")
  ?.parentElement?.querySelector(".js-taginput-fancy");

if (!target) {
  return;
}

const output = target.insertAdjacentElement(
  "afterend",
  document.createElement("div"),
);

function refresh() {
  const tagNames = [...target.querySelectorAll("[data-tag-name]")].map(
    (e) => e.dataset.tagName,
  );

  if (!tagNames.length) {
    output.textContent = "";
    return;
  }

  output.textContent = "Loading...";

  fetch(
    `/api/v1/json/search/tags?q=${encodeURIComponent(tagNames.join(" || "))}`,
  )
    .then((resp) => {
      if (!resp.ok) {
        throw new Error(`API response: ${resp.status} ${resp.statusText}`);
      }

      return resp;
    })
    .then((resp) => resp.json())
    .then(({ tags }) => {
      const missing = Array.from(
        new Set(
          tags
            .flatMap((t) => t.implied_tags)
            .filter((t) => !tags.some((tt) => tt.slug === t)),
        ),
      );

      if (missing.length) {
        output.textContent = `Missing: ${missing.join(", ")}`;
      } else {
        output.textContent = "All ok";
      }
    })
    .catch((error) => {
      console.error(error);
      output.textContent = `Error: ${error}`;
    });
}

refresh();
new MutationObserver(() => {
  refresh();
}).observe(target, { childList: true });