refactor(core): remove GA page views report (#1071)

- Google Analytics superProxy has been archived and is no longer maintained.
- Google Analytics UA end of life.

See also: https://support.google.com/analytics/answer/11583528?hl=en

_javascript/modules/components/pageviews.js

@@ -1,248 +0,0 @@
-/**
- * Count page views form GA or local cache file.
- *
- * Dependencies:
- *   - jQuery
- *   - countUp.js <https://github.com/inorganik/countUp.js>
- */
-
-const getInitStatus = (function () {
-  let hasInit = false;
-  return () => {
-    let ret = hasInit;
-    if (!hasInit) {
-      hasInit = true;
-    }
-    return ret;
-  };
-})();
-
-const PvOpts = (function () {
-  function getContent(selector) {
-    return $(selector).attr('content');
-  }
-
-  function hasContent(selector) {
-    let content = getContent(selector);
-    return typeof content !== 'undefined' && content !== false;
-  }
-
-  return {
-    getProxyMeta() {
-      return getContent('meta[name=pv-proxy-endpoint]');
-    },
-    getLocalMeta() {
-      return getContent('meta[name=pv-cache-path]');
-    },
-    hasProxyMeta() {
-      return hasContent('meta[name=pv-proxy-endpoint]');
-    },
-    hasLocalMeta() {
-      return hasContent('meta[name=pv-cache-path]');
-    }
-  };
-})();
-
-const PvStorage = (function () {
-  const Keys = {
-    KEY_PV: 'pv',
-    KEY_PV_SRC: 'pv_src',
-    KEY_CREATION: 'pv_created_date'
-  };
-
-  const Source = {
-    LOCAL: 'same-origin',
-    PROXY: 'cors'
-  };
-
-  function get(key) {
-    return localStorage.getItem(key);
-  }
-
-  function set(key, val) {
-    localStorage.setItem(key, val);
-  }
-
-  function saveCache(pv, src) {
-    set(Keys.KEY_PV, pv);
-    set(Keys.KEY_PV_SRC, src);
-    set(Keys.KEY_CREATION, new Date().toJSON());
-  }
-
-  return {
-    keysCount() {
-      return Object.keys(Keys).length;
-    },
-    hasCache() {
-      return localStorage.getItem(Keys.KEY_PV) !== null;
-    },
-    getCache() {
-      return JSON.parse(localStorage.getItem(Keys.KEY_PV));
-    },
-    saveLocalCache(pv) {
-      saveCache(pv, Source.LOCAL);
-    },
-    saveProxyCache(pv) {
-      saveCache(pv, Source.PROXY);
-    },
-    isExpired() {
-      let date = new Date(get(Keys.KEY_CREATION));
-      date.setHours(date.getHours() + 1); // per hour
-      return Date.now() >= date.getTime();
-    },
-    isFromLocal() {
-      return get(Keys.KEY_PV_SRC) === Source.LOCAL;
-    },
-    isFromProxy() {
-      return get(Keys.KEY_PV_SRC) === Source.PROXY;
-    },
-    newerThan(pv) {
-      return (
-        PvStorage.getCache().totalsForAllResults['ga:pageviews'] >
-        pv.totalsForAllResults['ga:pageviews']
-      );
-    },
-    inspectKeys() {
-      if (localStorage.length !== PvStorage.keysCount()) {
-        localStorage.clear();
-        return;
-      }
-
-      for (let i = 0; i < localStorage.length; i++) {
-        const key = localStorage.key(i);
-        switch (key) {
-          case Keys.KEY_PV:
-          case Keys.KEY_PV_SRC:
-          case Keys.KEY_CREATION:
-            break;
-          default:
-            localStorage.clear();
-            return;
-        }
-      }
-    }
-  };
-})(); /* PvStorage */
-
-function countUp(min, max, destId) {
-  if (min < max) {
-    let numAnim = new CountUp(destId, min, max);
-    if (!numAnim.error) {
-      numAnim.start();
-    } else {
-      console.error(numAnim.error);
-    }
-  }
-}
-
-function countPV(path, rows) {
-  let count = 0;
-
-  if (typeof rows !== 'undefined') {
-    for (let i = 0; i < rows.length; ++i) {
-      const 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) {
-  let count = countPV(path, rows);
-  count = count === 0 ? 1 : count;
-
-  if (!hasInit) {
-    elem.text(new Intl.NumberFormat().format(count));
-  } else {
-    const initCount = parseInt(elem.text().replace(/,/g, ''), 10);
-    if (count > initCount) {
-      countUp(initCount, count, elem.attr('id'));
-    }
-  }
-}
-
-function displayPageviews(data) {
-  if (typeof data === 'undefined') {
-    return;
-  }
-
-  let hasInit = getInitStatus();
-  const rows = data.rows; /* could be undefined */
-
-  if ($('.post').length > 0) {
-    /* the post */
-    const path = window.location.pathname;
-    tacklePV(rows, path, $('#pv'), hasInit);
-  }
-}
-
-function fetchProxyPageviews() {
-  if (PvOpts.hasProxyMeta()) {
-    $.ajax({
-      type: 'GET',
-      url: PvOpts.getProxyMeta(),
-      dataType: 'jsonp',
-      success: (data) => {
-        displayPageviews(data);
-        PvStorage.saveProxyCache(JSON.stringify(data));
-      },
-      error: (jqXHR, textStatus, errorThrown) => {
-        console.log(
-          'Failed to load pageviews from proxy server: ' + errorThrown
-        );
-      }
-    });
-  }
-}
-
-function fetchLocalPageviews(hasCache = false) {
-  return fetch(PvOpts.getLocalMeta())
-    .then((response) => response.json())
-    .then((data) => {
-      if (hasCache) {
-        // The cache from the proxy will sometimes be more recent than the local one
-        if (PvStorage.isFromProxy() && PvStorage.newerThan(data)) {
-          return;
-        }
-      }
-      displayPageviews(data);
-      PvStorage.saveLocalCache(JSON.stringify(data));
-    });
-}
-
-export function initPageviews() {
-  if ($('.pageviews').length <= 0) {
-    return;
-  }
-
-  PvStorage.inspectKeys();
-
-  if (PvStorage.hasCache()) {
-    displayPageviews(PvStorage.getCache());
-
-    if (PvStorage.isExpired()) {
-      if (PvOpts.hasLocalMeta()) {
-        fetchLocalPageviews(true).then(fetchProxyPageviews);
-      } else {
-        fetchProxyPageviews();
-      }
-    } else {
-      if (PvStorage.isFromLocal()) {
-        fetchProxyPageviews();
-      }
-    }
-  } else {
-    // no cached
-
-    if (PvOpts.hasLocalMeta()) {
-      fetchLocalPageviews().then(fetchProxyPageviews);
-    } else {
-      fetchProxyPageviews();
-    }
-  }
-}

_javascript/modules/plugins.js

@@ -3,5 +3,4 @@ export { initClipboard } from './components/clipboard';
 export { imgLazy } from './components/img-lazyload';
 export { imgPopup } from './components/img-popup';
 export { initLocaleDatetime } from './components/locale-datetime';
-export { initPageviews } from './components/pageviews';
 export { toc } from './components/toc';

_javascript/post.js

@@ -4,7 +4,6 @@ import {
   imgPopup,
   initLocaleDatetime,
   initClipboard,
-  initPageviews,
   toc
 } from './modules/plugins';
 
@@ -16,4 +15,3 @@ imgPopup();
 initLocaleDatetime();
 initClipboard();
 toc();
-initPageviews();