There are no navigation buttons for some video pages of tutorial series. This script adds missing buttons like Next or Previous.
当前为
// ==UserScript==
// @name Ctrl+Paint: Add missing Next and Previous buttons
// @namespace https://github.com/T1mL3arn
// @description There are no navigation buttons for some video pages of tutorial series. This script adds missing buttons like Next or Previous.
// @author T1mL3arn
// @version 1.0
// @icon https://static1.squarespace.com/static/50a3c190e4b0d12fc9231429/t/50f87f8ce4b0b3f0a2deeb1d/1537054440579/
// @match https://www.ctrlpaint.com/*
// @run-at document-end
// @noframes
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_deleteValue
// @grant GM_listValues
// @license GPLv3
// @homepageURL https://github.com/t1ml3arn-userscript-js/Ctrl-Paint-Add-missing-Next-and-Previous-buttons
// @supportURL https://github.com/t1ml3arn-userscript-js/Ctrl-Paint-Add-missing-Next-and-Previous-buttons/issues
// ==/UserScript==
(function () {
// lib section
let log = console.log;
let err = console.error;
function findHeader(elt){
let prev = elt;
while(prev = prev.previousSibling)
if(prev.tagName == 'H3')
return prev;
return null;
}
function mapsListItemsToNames(list){
let items = list.querySelectorAll('li > a');
let result = [];
items.forEach((item)=>result.push(item.textContent));
return result;
}
function mapListItemsToLinks(list){
let items = list.querySelectorAll('li > a');
let result = [];
items.forEach((item)=>result.push(item.href));
return result;
}
function readSeriesFrom(document){
let lists = document.querySelectorAll('ol, ul');
let results = [];
lists.forEach((list)=>{
// skip empty lists
if(list.children.length == 0)
return;
let header = findHeader(list);
if(header){
let links = mapListItemsToLinks(list);
if(links.length > 0){
let names = mapsListItemsToNames(list);
// just to be sure
if(names.length != links.length){
throw `Count of links isn\'t equal to count of names\nProblem in ${header.textContent}`;
}
results.push({
name: header.textContent,
videoNames: names,
videoLinks: links,
headerElt: header
});
}
}
});
if(results.length == 0)
throw 'There are no tutorial series at all!';
return results;
}
function findTutorialSeriesDataForCurrentPage() {
let path = window.location.pathname;
let videoIndex;
let index = TUTORIAL_SERIES.findIndex((seriesData)=>{
videoIndex = seriesData.videoLinks.findIndex((link)=>path != "/" && link.indexOf(path) != -1)
return videoIndex != -1;
});
if(index == -1)
return null;
let seriesData = TUTORIAL_SERIES[index];
seriesData.currentVideoIndex = videoIndex;
return seriesData;
}
function addButtons(seriesData) {
function getButtonHtml(href, label, name) {
return `<div class="button-block sqs-block-button" data-block-type="53" style="${btnCss}">
<div class="sqs-block-content">
<div class="sqs-block-button-container--center" data-alignment="center" data-button-size="small">
<a href="${href}" class="sqs-block-button-element--small sqs-block-button-element" data-initialized="true">
${label}
${name ?
`<br>
<span style="${videoNameCss}">${name}</span>` : ''
}
</a>
</div>
</div>
</div>`
}
function arrayToCss(acc, val, ind){
return ind%2 == 0 ? `${acc}${val}: ` : `${acc}${val} !important; `;
}
let btnCss = ["flex", "0 1 auto", "align-self", "auto", "margin", "10px"].reduce(arrayToCss, '');
let videoNameCss = "font-size, 11px, text-transform, none, color, #DDD".split(", ").reduce(arrayToCss);
let btnContCss = [
"display", "flex",
"flex-direction", "row",
"flex-wrap", "wrap",
"justify-content", "space-around",
"align-content", "center",
"align-items", "center",
"padding", "15px",
].reduce(arrayToCss, '');
let buttonsWrapper = document.createElement('div');
buttonsWrapper.setAttribute('style', btnContCss);
let videoBlock = document.querySelector('.sqs-block.embed-block.sqs-block-embed');
if(videoBlock == null)
throw 'There is no video block';
videoBlock.insertAdjacentElement('afterend', buttonsWrapper);
let names = seriesData.videoNames;
let links = seriesData.videoLinks;
let index = seriesData.currentVideoIndex;
let nextHtml = index+1 < names.length ? getButtonHtml(links[index+1], 'NEXT', names[index+1]) : '';
let prevHtml = index-1 > -1 ? getButtonHtml(links[index-1], 'PREVIOUS', names[index-1]) : '';
buttonsWrapper.insertAdjacentHTML('beforeend', prevHtml);
buttonsWrapper.insertAdjacentHTML('beforeend', nextHtml);
}
function patchSeriesData(seriesDataList) {
try {
let data = seriesDataList.find((seriesData) => seriesData.name.indexOf('Painting With Color') != -1);
let index = data.videoNames.indexOf('Color Constructor Pt.2 Exercises');
data.videoLinks[index] = 'https://www.ctrlpaint.com/videos/color-constructor-pt2-exercises';
} catch (e) {
err('Patch-1 error', e);
}
// remove the first series cause it has next/prev buttons
index = seriesDataList.findIndex((seriesData) => seriesData.name.indexOf('Digital Painting 101') != -1);
if(index != -1)
seriesDataList.splice(index, 1);
else
throw 'Patch-2 error';
return seriesDataList;
}
let SCRIPT_HANDLER;
let GM = {};
let TUTORIAL_SERIES;
const TUTORIAL_SERIES_KEY = 'tutorial_series_key';
try {
log(`
[ ${GM_info.script.name} ] inited
Script handler is ${GM_info.scriptHandler}
`);
SCRIPT_HANDLER = GM_info.scriptHandler;
GM.info = GM_info;
GM.getValue = function (key, default_) {
if(SCRIPT_HANDLER=='Violentmonkey')
return Promise.resolve(GM_getValue(key, default_));
else
return GM_getValue(key, default_);
};
GM.setValue = function (key, value) {
if(SCRIPT_HANDLER=='Violentmonkey')
return Promise.resolve(GM_setValue(key, value));
else
return GM_setValue(key, value);
};
GM.deleteValue = function (key) {
if(SCRIPT_HANDLER=='Violentmonkey'){
GM_deleteValue(key);
return Promise.resolve();
} else {
return GM_deleteValue(key);
}
};
GM.listValues = function () {
if(SCRIPT_HANDLER=='Violentmonkey')
return Promise.resolve(GM_listValues());
else
return GM_listValues();
};
} catch (e) {
log('ctrlpaint+ inited partialy. Something went wrong.');
}
// structure sample
let series ={
name: 'First Steps', /* Name of chapter */
videoNames: ['welcome', 'tut01'], /* Names of all videos in this chapter */
videoLinks: ['#', '#'], /* Links to each video in this chapter */
currentVideoIndex: -1 /* Uses to find previous or next video in this chapter */
};
(async ()=>{
TUTORIAL_SERIES = await GM.getValue(TUTORIAL_SERIES_KEY, null);
if(TUTORIAL_SERIES == null){
// FIRST TIME!
let libPageEreg = /\/library\//i;
if(libPageEreg.test(window.location.pathname)){
// library page, collect the series!
TUTORIAL_SERIES = readSeriesFrom(document);
TUTORIAL_SERIES = patchSeriesData(TUTORIAL_SERIES);
await GM.setValue(TUTORIAL_SERIES_KEY, TUTORIAL_SERIES);
} else {
// not a library page, need to fetch that page first
let response = await fetch('https://www.ctrlpaint.com/library/');
if(!response.ok) throw 'Cannot fetch library page at https://www.ctrlpaint.com/library/';
let pageText = await response.text();
let libraryDocument = new DOMParser().parseFromString(pageText, 'text/html');
TUTORIAL_SERIES = readSeriesFrom(libraryDocument);
TUTORIAL_SERIES = patchSeriesData(TUTORIAL_SERIES);
await GM.setValue(TUTORIAL_SERIES_KEY, TUTORIAL_SERIES);
}
}
// check if current page is a VIDEO page
let seriesData = findTutorialSeriesDataForCurrentPage();
if(seriesData != null){
addButtons(seriesData);
}
})();
})();