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Don't rely on waiting for pedagogy history
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@ -74,6 +74,7 @@ const initialUrlParams = new URLSearchParams(window.location.search);
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* @enum {number}
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*/
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const History = {
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NONE: 0,
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PUSH: 1,
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REPLACE: 2,
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};
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@ -82,9 +83,12 @@ const History = {
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* @param {string} key
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* @param {string | string[] | null} value
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* @param {History} action
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* @param {URL | null} url
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*/
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function update_query_string(key, value, action = History.REPLACE) {
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const url = new URL(window.location.href);
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function update_query_string(key, value, action = History.REPLACE, url = null) {
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if (!url){
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url = new URL(window.location.href);
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}
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if (!value) {
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// If the value is null, undefined or empty => delete it
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url.searchParams.delete(key)
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@ -96,8 +100,10 @@ function update_query_string(key, value, action = History.REPLACE) {
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}
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if (action === History.PUSH) {
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history.pushState(null, document.title, url.toString());
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history.pushState(null, "", url.toString());
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} else if (action === History.REPLACE) {
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history.replaceState(null, document.title, url.toString());
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history.replaceState(null, "", url.toString());
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}
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return url;
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}
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@ -128,6 +128,27 @@
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#}
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const page_default = 1;
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const page_size_default = 100;
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function debouncePromise (fn, ms = 0) {
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let timeoutId;
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const pending = [];
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return (...args) =>
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new Promise((res, rej) => {
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clearTimeout(timeoutId);
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timeoutId = setTimeout(() => {
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const currentPending = [...pending];
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pending.length = 0;
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Promise.resolve(fn.apply(this, args)).then(
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data => {
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currentPending.forEach(({ resolve }) => resolve(data));
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},
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error => {
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currentPending.forEach(({ reject }) => reject(error));
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}
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);
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}, ms);
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pending.push({ resolve: res, reject: rej });
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});
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};
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document.addEventListener("alpine:init", () => {
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Alpine.data("uv_search", () => ({
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uvs: [],
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@ -138,8 +159,11 @@
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department: [],
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credit_type: [],
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semester: [],
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to_change: [],
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pushstate: History.PUSH,
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update: undefined,
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async initialize_args() {
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let url = new URLSearchParams(window.location.search);
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this.pushstate = History.REPLACE;
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@ -155,19 +179,28 @@
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this.semester = url.has("semester") ?
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url.get("semester").split("_AND_") : [];
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{# Wait for all watch callbacks to be called #}
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await (new Promise(resolve => setTimeout(resolve, 100)));
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await this.update()
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this.pushstate = History.PUSH;
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},
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async init() {
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await this.initialize_args();
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this.update = debouncePromise(async () => {
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await Promise.all(this.to_change).then(async (data) => {
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{# Create the whole url before changing everything all at once #}
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let first = data.shift();
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let url = update_query_string(first[0], first[1], History.NONE);
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data.forEach((data) => {
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url = update_query_string(data[0], data[1], History.NONE, url);
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})
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update_query_string(first[0], first[1], this.pushstate, url);
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await this.fetch_data(); {# reload data on form change #}
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this.to_change = [];
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})
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}, 50);
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let search_params = ["search", "department", "credit_type", "semester"];
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let pagination_params = ["page", "page_size"];
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this.fetch_data(); {# load initial data #}
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search_params.forEach((param) => {
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this.$watch(param, async (value) => {
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if (this.pushstate != History.PUSH){
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@ -181,16 +214,20 @@
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});
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search_params.concat(pagination_params).forEach((param) => {
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this.$watch(param, async (value) => {
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console.log(param + " " + value)
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update_query_string(param, value, this.pushstate);
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await this.fetch_data(); {# reload data on form change #}
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this.to_change.push(new Promise((resolve) => {
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resolve([param, value]);
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})
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);
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this.update();
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});
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});
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window.addEventListener("popstate", () => {
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this.initialize_args();
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window.addEventListener("popstate", async (event) => {
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await this.initialize_args();
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});
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await this.initialize_args();
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},
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async fetch_data() {
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this.loading = true;
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const url = "{{ url("api:fetch_uvs") }}" + window.location.search;
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