mirror of
https://github.com/iv-org/invidious.git
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2b2d67fcfa
Co-authored-by: syeopite <70992037+syeopite@users.noreply.github.com>
80 lines
3.1 KiB
JavaScript
80 lines
3.1 KiB
JavaScript
'use strict';
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const CURRENT_CONTINUATION = (new URL(document.location)).searchParams.get("continuation");
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const CONT_CACHE_KEY = `continuation_cache_${encodeURIComponent(window.location.pathname)}`;
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function get_data(){
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return JSON.parse(sessionStorage.getItem(CONT_CACHE_KEY)) || [];
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}
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function save_data(){
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const prev_data = get_data();
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prev_data.push(CURRENT_CONTINUATION);
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sessionStorage.setItem(CONT_CACHE_KEY, JSON.stringify(prev_data));
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}
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function button_press(){
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let prev_data = get_data();
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if (!prev_data.length) return null;
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// Sanity check. Nowhere should the current continuation token exist in the cache
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// but it can happen when using the browser's back feature. As such we'd need to travel
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// back to the point where the current continuation token first appears in order to
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// account for the rewind.
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const conflict_at = prev_data.indexOf(CURRENT_CONTINUATION);
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if (conflict_at != -1) {
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prev_data.length = conflict_at;
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}
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const prev_ctoken = prev_data.pop();
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// On the first page, the stored continuation token is null.
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if (prev_ctoken === null) {
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sessionStorage.removeItem(CONT_CACHE_KEY);
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let url = window.location.href.split('?')[0];
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let params = window.location.href.split('?')[1];
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let url_params = new URLSearchParams(params);
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url_params.delete('continuation');
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window.location.href = `${url}?${url_params.toString()}`;
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return;
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}
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sessionStorage.setItem(CONT_CACHE_KEY, JSON.stringify(prev_data));
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let url = window.location.href.split('?')[0];
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let params = window.location.href.split('?')[1];
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let url_params = new URLSearchParams(params);
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url_params.set("continuation", prev_ctoken);
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window.location.href = `${url}?${url_params.toString()}`;
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};
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addEventListener('DOMContentLoaded', function(){
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const pagination_data = JSON.parse(document.getElementById('pagination-data').textContent);
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const next_page_containers = document.getElementsByClassName("page-next-container");
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for (let container of next_page_containers){
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const next_page_button = container.getElementsByClassName("pure-button")
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// exists?
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if (next_page_button.length > 0){
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next_page_button[0].addEventListener("click", save_data);
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}
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}
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// Only add previous page buttons when not on the first page
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if (CURRENT_CONTINUATION) {
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const prev_page_containers = document.getElementsByClassName("page-prev-container")
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for (let container of prev_page_containers) {
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if (pagination_data.is_rtl) {
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container.innerHTML = `<button class="pure-button pure-button-secondary">${pagination_data.prev_page} <i class="icon ion-ios-arrow-forward"></i></button>`
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} else {
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container.innerHTML = `<button class="pure-button pure-button-secondary"><i class="icon ion-ios-arrow-back"></i> ${pagination_data.prev_page}</button>`
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}
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container.getElementsByClassName("pure-button")[0].addEventListener("click", button_press);
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}
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}
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});
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