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/**
* Count pageviews form GA or local cache file.
*
* Dependences:
* - jQuery
* - countUp.js <https://github.com/inorganik/countUp.js>
*
* v2.0
* https://github.com/cotes2020/jekyll-theme-chirpy
* © 2018-2019 Cotes Chung
* MIT License
*/
var getInitStatus = (function () {
var hasInit = false;
return () => {
let ret = hasInit;
if (!hasInit) {
hasInit = true;
}
return ret;
};
}());
var PvCache = (function () {
const KEY_PV = "pv";
const KEY_CREATION = "pv_created_date";
const KEY_PV_SRC = "pv_source";
var Source = {
ORIGIN: "origin",
PROXY: "proxy"
};
function get(key) {
return localStorage.getItem(key);
}
function set(key, val) {
localStorage.setItem(key, val);
}
return {
getData() {
return JSON.parse(localStorage.getItem(KEY_PV) );
},
saveOriginCache(pv) {
set(KEY_PV, pv);
set(KEY_PV_SRC, Source.ORIGIN );
set(KEY_CREATION, new Date().toJSON() );
},
saveProxyCache(pv) {
set(KEY_PV, pv);
set(KEY_PV_SRC, Source.PROXY );
set(KEY_CREATION, new Date().toJSON() );
},
isFromOrigin() {
return get(KEY_PV_SRC) === Source.ORIGIN;
},
isFromProxy() {
return get(KEY_PV_SRC) === Source.PROXY;
},
isExpired() {
if (PvCache.isFromOrigin() ) {
let date = new Date(get(KEY_CREATION));
date.setDate(date.getDate() + 1); /* update origin records every day */
return Date.now() >= date.getTime();
} else if (PvCache.isFromProxy() ) {
let date = new Date(get(KEY_CREATION) );
date.setHours(date.getHours() + 1); /* update proxy records per hour */
return Date.now() >= date.getTime();
}
return false;
},
getAllPagevies() {
return PvCache.getData().totalsForAllResults["ga:pageviews"];
},
newerThan(pv) {
return PvCache.getAllPagevies() > pv.totalsForAllResults["ga:pageviews"];
},
inspectKeys() {
if (localStorage.getItem(KEY_PV) === null
|| localStorage.getItem(KEY_PV_SRC) === null
|| localStorage.getItem(KEY_CREATION) === null) {
localStorage.clear();
}
}
};
}()); /* PvCache */
function countUp(min, max, destId) {
if (min < max) {
var numAnim = new CountUp(destId, min, max);
if (!numAnim.error) {
numAnim.start();
} else {
console.error(numAnim.error);
}
}
}
function countPV(path, rows) {
var count = 0;
if (typeof rows !== "undefined" ) {
for (var i = 0; i < rows.length; ++i) {
var gaPath = rows[parseInt(i, 10)][0];
if (gaPath === path) { /* path format see: site.permalink */
count += parseInt(rows[parseInt(i, 10)][1], 10);
break;
}
}
}
return count;
}
function tacklePV(rows, path, elem, hasInit) {
var count = countPV(path, rows);
count = (count === 0 ? 1 : count);
if (!hasInit) {
elem.text(new Intl.NumberFormat().format(count));
} else {
var initCount = parseInt(elem.text().replace(/,/g, ""), 10);
if (count > initCount) {
countUp(initCount, count, elem.attr("id"));
}
}
}
function displayPageviews(data) {
if (typeof data === "undefined") {
return;
}
var hasInit = getInitStatus();
var rows = data.rows; /* could be undefined */
if ($("#post-list").length > 0) { /* the Home page */
$(".post-preview").each(function() {
var path = $(this).children("div").children("h1").children("a").attr("href");
tacklePV(rows, path, $(this).find(".pageviews"), hasInit);
});
} else if ($(".post").length > 0) { /* the post */
var path = window.location.pathname;
tacklePV(rows, path, $("#pv"), hasInit);
}
}
function fetchProxyPageviews() {
$.ajax({
type: "GET",
url: proxyEndpoint, /* see: /assets/js/_pv-config.js */
dataType: "jsonp",
jsonpCallback: "displayPageviews",
success: (data, textStatus, jqXHR) => {
PvCache.saveProxyCache(JSON.stringify(data));
},
error: (jqXHR, textStatus, errorThrown) => {
console.log("Failed to load pageviews from proxy server: " + errorThrown);
}
});
}
function fetchPageviews(fetchOrigin = true, filterOrigin = false) {
/* pvCacheEnabled › see: /assets/js/_pv-config.js */
if (pvCacheEnabled && fetchOrigin) {
fetch("/assets/js/data/pageviews.json")
.then((response) => response.json())
.then((data) => {
if (filterOrigin) {
if (PvCache.newerThan(data)) {
return;
}
}
displayPageviews(data);
PvCache.saveOriginCache(JSON.stringify(data));
})
.then(() => fetchProxyPageviews());
} else {
fetchProxyPageviews();
}
}
$(function() {
if ($(".pageviews").length > 0) {
PvCache.inspectKeys();
let cache = PvCache.getData();
if (cache) {
displayPageviews(cache);
if (PvCache.isExpired()) {
fetchPageviews(true, PvCache.isFromProxy());
} else {
if (PvCache.isFromOrigin()) {
fetchPageviews(false);
}
}
} else {
fetchPageviews();
}
}
});