AO3: [Wrangling] Mark Illegal Characters in Canonicals

Warns about any canonical tag that includes characters which should, per guidelines, be avoided. Checks on new tag, edit tag, search results, wrangle bins, and tag landing pages

// ==UserScript==
// @name         AO3: [Wrangling] Mark Illegal Characters in Canonicals
// @namespace    https://gf.qytechs.cn/en/users/906106-escctrl
// @version      3.0
// @description  Warns about any canonical tag that includes characters which should, per guidelines, be avoided. Checks on new tag, edit tag, search results, wrangle bins, and tag landing pages
// @author       escctrl
// @match        *://*.archiveofourown.org/tags/*
// @license      MIT
// @grant        none
// ==/UserScript==

/* eslint-disable no-multi-spaces */
'use strict';

// utility to reduce verboseness
const q = (s, n=document) => n.querySelector(s);
const qa = (s, n=document) => n.querySelectorAll(s);
const ins = (n, l, html) => n.insertAdjacentHTML(l, html);

// stop on retry later or styled Error pages
if ( (q('#main') === null) || (q('#main.system.errors') !== null) ) return;

ins(q("head"), 'beforeend', `<style tyle="text/css">
    .illegalChars svg { width: 1em; height: 1em; display: inline-block; vertical-align: -0.15em; }
    .illegalCharsInline { display: inline-block; padding: 0 !important; margin: 0.1em 0.1em 0.1em 0.5em !important; }
    .illegalCharsInline p { padding: 0.1em 0.3em; fontWeight: normal; }
</style>`);

// on every page the way to find the tags to check is slightly different
let main = q('#main');
if (main.classList.contains('tags-wrangle')) checkBinTags();
else if (main.classList.contains('tags-edit') || main.classList.contains('tags-update')) checkEditTag(); // .tags-update after a Save failed
else if (main.classList.contains('tags-show')) checkTag();
else if (main.classList.contains('tags-search')) checkSearchResults();
else if (main.classList.contains('tags-new')) checkAsYouType();
 
// *************** GENERAL FUNCTIONS ***************

// a holistic function to check what's not allowed
// running as separate matches because regex alternation can't flag multiple issues on same letter
function hasIllegalChars(string, is_fandom, refNode, befNode = null, inline = false) {
    let testing = { // includes the regex to check (r) and the error message to log (l)
        letter:     { r: /[^\p{Script=Latin}0-9 \-().&/'"|:!#_]/ }, // non-latin (including accented) characters and special chars (with a few exceptions)
        multiap:    { r: /'{2,}/, l: "two ' instead of \"" },       // two apostrophes '' used instead of a quote "
        slash1:     { r: / \//,   l: "space before /" },            // a slash with spaces before or after
        slash2:     { r: /\/ /,   l: "space after /" },
        amp1:       { r: /[^ ]&/, l: "no space before &" },         // an apersand without spaces before and after
        amp2:       { r: /&[^ ]/, l: "no space after &" },
        bracket1:   { r: / \)/,   l: "space before )" },            // opening parenthesis with spaces after, and closing with spaces before
        bracket2:   { r: /\( /,   l: "space after (" },
        multispace: { r: / {2,}/, l: "multiple spaces" },           // multiple spaces after each other
        spbegin:    { r: /^ /,    l: "space at beginning" },        // space at the beginning or end of the string
        spend:      { r: / $/,    l: "space at end" }
    }
    if (is_fandom) { //in fandoms we allow letters, numbers and tone/accent marks of ANY script (not just Latin) and more special characters
        testing.letter.r = /[^\p{L}\p{M}\p{N} \-().&/'"|:!#?_]/;    // any script letters, accent marks, numbers, and more special chars
        delete testing.slash1; delete testing.slash2;
        delete testing.amp1; delete testing.amp2;
    }

    let issues = [];
    for (const [key, value] of Object.entries(testing)) {
        let found = string.match(new RegExp(value.r, "gui")); // add flags, run checks
        if (found === null) continue; // skip if nothing's illegal

        for (let match of found) { // build the list of readable issues
            if (key === "letter") {
                if (match === "\t") match = "tab";
                issues.push(match);
            }
            else issues.push(value.l);
        }
    }
    if (string.split("(").length < string.split(")").length) issues.push("missing a ("); // should have the same number of ( and )
    if (string.split("(").length > string.split(")").length) issues.push("missing a )");

    if (issues.length !== 0) insertHeadsUp(issues, refNode, befNode, inline); // write out whatever issues there are
}
 
// print a box to explain the problem
function insertHeadsUp(illegalChars, refNode, befNode, inline) {

    // setting up the div to contain the heads-up to the user
    const warningNode = document.createElement("div");
    warningNode.classList.add("notice", "illegalChars");
    if (inline) warningNode.classList.add("illegalCharsInline");

    // SVGs from Heroicons https://heroicons.com (MIT license Copyright (c) Tailwind Labs, Inc. https://github.com/tailwindlabs/heroicons/blob/master/LICENSE)
    let icon = `<svg viewBox="0 0 24 24" fill="currentColor"><title>Questionable characters found, please check</title><path fill-rule="evenodd" d="M2.25 12c0-5.385 4.365-9.75 9.75-9.75s9.75 4.365 9.75 9.75-4.365 9.75-9.75 9.75S2.25 17.385 2.25 12Zm11.378-3.917c-.89-.777-2.366-.777-3.255 0a.75.75 0 0 1-.988-1.129c1.454-1.272 3.776-1.272 5.23 0 1.513 1.324 1.513 3.518 0 4.842a3.75 3.75 0 0 1-.837.552c-.676.328-1.028.774-1.028 1.152v.75a.75.75 0 0 1-1.5 0v-.75c0-1.279 1.06-2.107 1.875-2.502.182-.088.351-.199.503-.331.83-.727.83-1.857 0-2.584ZM12 18a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Z" clip-rule="evenodd" /></svg>`;
    warningNode.innerHTML = `<p>${icon} ${illegalChars.join(", ")}</p>`;
 
    // if that already exists, we're gonna replace it rather than add more divs
    if (refNode.querySelector(".illegalChars")) refNode.replaceChild(warningNode, refNode.querySelector(".illegalChars"));
    else refNode.insertBefore(warningNode, befNode);
}

// remove the explain box again
function removeHeadsUp(refNode) {
    if (refNode.querySelector(".illegalChars")) refNode.removeChild(refNode.querySelector(".illegalChars"));
}

// *************** PAGE HANDLING FUNCTIONS ***************

// New tag page
function checkAsYouType() {
    // debounce, deferred helper functions: Mulan @ https://stackoverflow.com/a/68228099
    function debounce (task, ms) { let t = { promise: null, cancel: _ => void 0 }; return async (...args) => { try { t.cancel(); t = deferred(ms); await t.promise; await task(...args); } catch (_) { } } }
    function deferred (ms) { let cancel, promise = new Promise((resolve, reject) => { cancel = reject; setTimeout(resolve, ms) }); return { promise, cancel } }

    // actual checks for illegal characters and tag length
    function checkInput() {
        var checkNode = q("#tag_name");
        removeHeadsUp(checkNode.parentNode); // reset
        if (checkNode.value === "") return;

        // which tag type are you trying to create? fandom or anything else?
        const isFandom = q('#tag_type_fandom').checked;
        hasIllegalChars(checkNode.value, isFandom, checkNode.parentNode);

        // length counter
        let label = q('dt label[for="tag_name"]');
        label.innerText = "Name (" + checkNode.value.length +")";

        // extra special handling: tag length>150 error
        const refNode = checkNode.parentNode;
        if (checkNode.value.length > 150) {
            const errorNode = document.createElement("div");
            errorNode.id = "tooLong";
            errorNode.classList.add("error");
            errorNode.innerHTML = "<p>Sorry, you'll need to trim this down. You're at "+ checkNode.value.length +" characters!</p>";

            // if that already exists, we're gonna replace it rather than add more divs
            if (refNode.querySelector("#tooLong")) refNode.replaceChild(errorNode, refNode.querySelector("#tooLong"));
            else refNode.insertBefore(errorNode, null);
        }
        else if (refNode.querySelector("#tooLong")) refNode.removeChild(refNode.querySelector("#tooLong"));
    }

    // add the same event listener to all checkbox elements - checkInput is executed immediately (no debounce necessary)
    [ q('#tag_type_fandom'), q('#tag_type_character'), q('#tag_type_relationship'), q('#tag_type_freeform') ].forEach((el) => el.addEventListener("input", checkInput));
    // debounced listener while typing
    q('#tag_name').addEventListener("input", debounce(checkInput, 500));

    // on page load, trigger event once. browser remembers previous form selections/input upon page refresh and box would otherwise not appear until another change is made
    q("#tag_name").dispatchEvent(new Event("input"));
}

// Landing page
function checkTag() {
    // only if the viewed tags is canonical
    var tagDescr = q(".tag>p").innerText;
    if (tagDescr.indexOf("It's a canonical tag") < 0) return true;

    // first the viewed tag itself
    var checkNode = q(".tag .header h2.heading");
    var tagType = tagDescr.match(/This tag belongs to the (.+) Category/i);
    tagType = tagType[1];
    hasIllegalChars(checkNode.innerText, (tagType === "Fandom"), checkNode.parentNode.parentNode, checkNode.parentNode.parentNode.children[1]);

    // then the meta and subtags (if any)
    checkNode = qa("div.meta.listbox a.tag, div.sub.listbox a.tag");
    checkNode.forEach((n) => hasIllegalChars(n.innerText, (tagType === "Fandom"), n.parentNode, n.parentNode.children[1], true));
    // it would be really cool if we could check Parent Tags as well, but we can't tell which of those are fandoms vs. anything else
}

// Wrangle Bin Page
// sadly we can't tell here at all if we're ever looking at fandoms
function checkBinTags() {
    // this needs a different approach to the logic:
    // don't check show=mergers at all, too repetitive
    var searchParams = new URLSearchParams(window.location.search);
    if (searchParams.get('show') == "mergers") return true;

    // create a key -> value pair Map of the table columns, so we know which column to check
    var tableIndexes = new Map();
    qa("#wrangulator table thead th").forEach((th, ix) => tableIndexes.set(th.innerText, ix));

    // now we can loop through the list of tags
    var checkNode;
    var checkRows = qa("#wrangulator table tbody tr");
    checkRows.forEach((r) => {
        // if there's a column "Canonical" and the cell says "Yes" then we check the tag itself
        if (tableIndexes.has("Canonical") && r.cells[tableIndexes.get("Canonical")].innerText == "Yes") {
            checkNode = q("label", r.cells[0]);
            hasIllegalChars(checkNode.innerText, (searchParams.get('show') === "fandoms"), checkNode.parentNode);
        }

        // if there's a column "Synonym", we check the content of that cell (there'll only be one tag)
        if (tableIndexes.has("Synonym") && r.cells[tableIndexes.get("Synonym")].innerText.trim() !== "") {
            checkNode = q("a", r.cells[tableIndexes.get("Synonym")]);
            hasIllegalChars(checkNode.innerText, (searchParams.get('show') === "fandoms"), checkNode.parentNode);
        }

        // if there's a column "Characters", we check the content of that cell (there might be multiple tags)
        if (tableIndexes.has("Characters") && r.cells[tableIndexes.get("Characters")].innerText.trim() !== "") {
            checkNode = qa("a", r.cells[tableIndexes.get("Characters")]);
            checkNode.forEach((n) => hasIllegalChars(n.innerText, false, n.parentNode));
        }

        // if there's a column "Metatag", we check the content of that cell (there might be multiple tags)
        if (tableIndexes.has("Metatag") && r.cells[tableIndexes.get("Metatag")].innerText.trim() !== "") {
            checkNode = qa("a", r.cells[tableIndexes.get("Metatag")]);
            checkNode.forEach((n) => hasIllegalChars(n.innerText, (searchParams.get('show') === "fandoms"), n.parentNode));
        }
    });
}

// Tag Search
function checkSearchResults() {
    // with search results table userscript enabled
    var checkNodes = qa("table#resulttable .resulttag.canonical a, table#resulttable .resultName.canonical a");
    checkNodes.forEach((n) => hasIllegalChars(n.innerText, (q('.resulttype, .resultType', n.parentNode.parentNode).title.startsWith("Fandom")), n.parentNode, null, true));

    // with plain search results page
    checkNodes = qa("ol.tag li span.canonical a.tag");
    checkNodes.forEach((n) => hasIllegalChars(n.innerText, (n.parentNode.firstChild.textContent.trim() == "Fandom:"), n.parentNode.parentNode, null, true));
}

// Edit Tag Page
function checkEditTag() {
    const tagCanonical = q('#tag_canonical');
    const tagName = q("#tag_name");
    const tagType = q('#tag_sortable_name') !== null ? "Fandom" : ""; // only fandom tags have the name-for-sorting field

    // initial check only if the tag is already canonical
    if (tagCanonical.checked) hasIllegalChars(tagName.value, (tagType === "Fandom"), tagName.parentNode);

    // if the tag's canonical status is changed
    tagCanonical.addEventListener("input", (event) => {
        removeHeadsUp(tagName.parentNode);
        if (event.target.checked) hasIllegalChars(tagName.value, (tagType === "Fandom"), tagName.parentNode);
    });

    // if this is a synonym, check the canonical tag it's synned to
    const synonym = q('ul.autocomplete .added.tag', tagName.parentNode.parentNode);
    if (synonym !== null) hasIllegalChars(synonym.firstChild.textContent.trim(), (tagType === "Fandom"), synonym.parentNode.parentNode, synonym.parentNode.parentNode.children[1]);

    // if this is canonical, check its sub- and metatags
    const metasubs = qa('#parent_MetaTag_associations_to_remove_checkboxes ul li a, #child_SubTag_associations_to_remove_checkboxes ul li a');
    if (metasubs !== null) metasubs.forEach((n) => hasIllegalChars(n.innerText, (tagType === "Fandom"), n.parentNode));

    // if this is any other type of tag that's in a fandom, check the fandom tag
    const fandoms = qa('#parent_Fandom_associations_to_remove_checkboxes ul li a');
    if (fandoms !== null) fandoms.forEach((n) => hasIllegalChars(n.innerText, true, n.parentNode));

    // if this is a relationship, check the tagged characters
    const chars = qa('#parent_Character_associations_to_remove_checkboxes ul li a');
    if (chars !== null) chars.forEach((n) => hasIllegalChars(n.innerText, false, n.parentNode));
}

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