Derpibooru - Extra Buttons

Adds multiple buttons to one-click-apply common search/filter options

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Derpibooru - Extra Buttons
// @namespace   Selbi
// @version     3.0.1
// @include     /https?\:\/\/(www\.)?derpiboo(\.ru|ru\.org)\/(tags|search).+/
// @grant       none
// @description Adds multiple buttons to one-click-apply common search/filter options
// ==/UserScript==

(function() {

  // Score Button
  const TARGET_SCORE = "score";
  const TARGET_DESCENDING = "desc";
  let sortButtonIcon = document.createElement("i");
  sortButtonIcon.classList = "fas fa-sort-amount-down";
  Object.assign(sortButtonIcon.style, {
    width: "28px",
    textAlign: "center"
  });
  let sortButton = document.createElement("a");
  sortButton.classList = "header__search__button";
  sortButton.title = "Sort by descending score";
  sortButton.appendChild(sortButtonIcon);
  document.querySelector(".header__search").appendChild(sortButton);
  sortButton.onclick = function() {
    let sortDropdown = document.querySelector("#searchform_sf");
    sortDropdown.selectedIndex = findOptionIndex(sortDropdown, TARGET_SCORE);
    let orderDropdown = document.querySelector("#searchform_sd");
    orderDropdown.selectedIndex = findOptionIndex(orderDropdown, TARGET_DESCENDING);
    document.querySelector(".field > button:first-child").click();
  };

  function findOptionIndex(elem, value) {
    let options = elem.getElementsByTagName("option");
    let index = 0;
    for (o of options) {
      if (o.value == value) {
        return index;
      }
      index++;
    }
    return -1;
  }

  // Safe Button
  var queryBox = document.querySelector("#q");
  const RATINGS = ["-safe", "safe", "suggestive", "questionable", "explicit"];
  let safeButtonIcon = document.createElement("i");
  safeButtonIcon.classList = "fas fa-horse";
  Object.assign(safeButtonIcon.style, {
    width: "28px",
    textAlign: "center"
  });
  let safeButton = document.createElement("a");
  safeButton.classList = "header__search__button";
  safeButton.title = "Go to the next rating";
  safeButton.appendChild(safeButtonIcon);
  sortButton.after(safeButton);
  safeButton.onclick = function() {
    let query = queryBox.value;
    let previousRating = -1;
    for (i = 0; i < RATINGS.length; i++) {
      if (query.includes(RATINGS[i])) {
        previousRating = i;
        break;
      }
    }
    let nextRating = previousRating + 1;
    if (previousRating < 0) {
      // Entry point to "safe" when no rating is set
      query += ", " + RATINGS[nextRating];
    } else if (nextRating >= RATINGS.length) {
      // When we wrap around, remove the rating
      let previousRatingText = RATINGS[previousRating];
      query = query.replace(previousRatingText, "");
    } else {
      // Proceed to the next one
      let previousRatingText = RATINGS[previousRating];
      let nextRatingText = RATINGS[nextRating];
      query = query.replace(previousRatingText, nextRatingText);
    }
    startSearch(query);
  };

  // No-Animation Button
  let noAniButtonIcon = document.createElement("i");
  noAniButtonIcon.classList = "fas fa-video-slash";
  Object.assign(noAniButtonIcon.style, {
    width: "28px",
    textAlign: "center"
  });
  let noAniButton = document.createElement("a");
  noAniButton.classList = "header__search__button";
  noAniButton.title = "Toggle all animated content";
  noAniButton.appendChild(noAniButtonIcon);
  safeButton.after(noAniButton);
  noAniButton.onclick = function() {
    let query = queryBox.value;
    if (query.includes("-animated")) {
      // Remove it
      query = query.replace("-animated", "");
    } else {
      query += ", -animated";
    }
    startSearch(query);
  };

  function startSearch(query) {
    let normalizedQuery = query.replace(/\s+/g, " ").replace(/(^\s*,\s*|\s*,\s*$)/g, "").replace(/\s*,\s*,\s*/g, ", ");
    if (!normalizedQuery) {
      normalizedQuery = RATINGS[0];
    }
    queryBox.value = normalizedQuery;
    document.querySelector("button.header__search__button").click();
  }
})();