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derpi_only_show_upvotes

25/06/2023 Replaces images' score with only upvotes, instead of the usual combined upvotes+downvotes. Also hides downvotes. Fetches the scores via individual API calls to https://derpibooru.org/api/v1/json/images/imageNumber

נכון ליום 25-06-2023. ראה הגרסה האחרונה.

// ==UserScript==
// @name       derpi_only_show_upvotes
// @namespace   Violentmonkey Scripts
// @match       https://derpibooru.org/*
// @grant       none
// @version     1.0
// @license MIT
// @author      Saphkey
// @description 25/06/2023 Replaces images' score with only upvotes, instead of the usual combined upvotes+downvotes. Also hides downvotes. Fetches the scores via individual API calls to https://derpibooru.org/api/v1/json/images/imageNumber
// ==/UserScript==


(function() {
	function gatherImageIds() {
		let images = document.getElementsByClassName('score');
		let imageIds = [];
		for (let i = 0; i < images.length; i++) {
			imageIds.push(images[i].getAttribute('data-image-id'));
		}
		return imageIds;
	}

	function hideScores(){
		let scoreEls = document.getElementsByClassName('score');
		for (let i = 0; i < scoreEls.length; i++) {
			scoreEls[i].innerHTML = '?';
		}
	}

	function hideDownvotes() {
		let downvoteEls = document.getElementsByClassName('downvotes');
		for (let i = 0; i < downvoteEls.length; i++) {
			downvoteEls[i].innerHTML = '?';
		}
	}

	async function getUpvotesThenCallDisplayUpvotes(imageIds, maxParalelRequests) {
		let requestQ = [];
		let imageUpvotesObj = {};

		async function processRequest(res) {try{
			res = await res.json();
			imageUpvotesObj[res.image.id] = res.image.upvotes;
			console.log(`imageID: ${res.image.id} upvotes: ${res.image.upvotes}`)

			//if (Object.keys(imageUpvotesObj).length === imageIds.length){
			//	displayAllUpvotes(imageUpvotesObj);
			//}
			displaySingleUpvote(res.image.upvotes, res.image.id);
		}catch(err){
			console.log(err);
		}}

		for (let i = 0; i < imageIds.length; i++) {

			if (requestQ.length >= maxParalelRequests) {

				let nextRequest = requestQ.shift()

				await nextRequest.then((response) => {
					processRequest(response);
				})

			}

			requestQ.push(fetch(`https://derpibooru.org/api/v1/json/images/${imageIds[i]}`))
		}

		let nextRequest = requestQ[0];
		while(nextRequest = requestQ.shift()) {

			await nextRequest.then((response) => {
				processRequest(response);
			})
		}
	}


	function displayAllUpvotes(upvotesObj) {
		let scoreEls = document.getElementsByClassName('score');

		for (let i = 0; i < scoreEls.length; i++) {
			let scoreEl = scoreEls[i];
			let imageId = scoreEl.getAttribute('data-image-id');
			let upvotes = upvotesObj[imageId];
			if (upvotes !== undefined) {
				scoreEl.innerText = upvotes;
			}
			else {
				scoreEl.innerText = '?';
			}
		}
	}


	function displaySingleUpvote(upvotes, imageId) {
		let scoreEls = document.getElementsByClassName('score');

		for (let i = 0; i < scoreEls.length; i++) {
			let scoreEl = scoreEls.item(i);

			if (scoreEl.getAttribute(`data-image-id`) == imageId){
				scoreEl.innerHTML = upvotes;
			}
		}
	}


	window.onload = async function() {
		hideScores();
		hideDownvotes();

		let imageIds = gatherImageIds();
		await getUpvotesThenCallDisplayUpvotes(imageIds, 8);
	}
})();