refactor: Make some error handing

layout/_layout.pug

@@ -26,7 +26,7 @@ html(lang=config.language)
             if page.comments
               include ./_partials/widgets/comments.pug
 
-          if theme.sidebar.enable
+          if theme.sidebar && theme.sidebar.enable
             aside#sidebar.sidebar
               div.sidebar-inner
                 include ./_partials/sidebar/sidebar.pug
@@ -39,7 +39,7 @@ html(lang=config.language)
 
       include ./_partials/widgets/loading-bar.pug
 
-      if theme.back2top.enable
+      if theme.back2top && theme.back2top.enable
         include ./_partials/widgets/back2top.pug
     include ./_partials/search/index.pug
 

layout/_partials/config.pug

 -
   var algolia = "undefined";
   var env = process.env;
-  if (theme.algolia_search.enable) {
+  if (theme.algolia_search && theme.algolia_search.enable) {
     algolia = JSON.stringify({
       appId: env.ALGOLIA_APP_ID || config.algolia.appId || config.algolia.applicationID,
       apiKey: env.ALGOLIA_API_KEY || config.algolia.apiKey,
@@ -23,25 +23,27 @@
   }
 
   var sidebar = "undefined";
-  if (theme.sidebar.enable) {
+  if (theme.sidebar && theme.sidebar.enable) {
     sidebar = JSON.stringify({
       offsetTop: theme.sidebar.offsetTop,
-      renderTocDepth: theme.toc.max_depth
+      tocMaxDepth: theme.toc.max_depth
     });
   }
 
   var back2top = "undefined";
-  if (theme.back2top.enable) {
+  if (theme.back2top && theme.back2top.enable) {
     back2top = JSON.stringify({
-      enable: theme.back2top.enable,
-      animation: theme.back2top.icon.animation
+      enable: theme.back2top.enable
     });
   }
 
   var header = "undefined";
   if (theme.header) {
+    var isScrollDownIcon =
+      (theme.header.scroll_down_icon && theme.header.scroll_down_icon.enable) || false;
+
     header = JSON.stringify({
-      scrollDownIcon: theme.header.scroll_down_icon.enable,
+      scrollDownIcon: isScrollDownIcon,
     });
   }
 
@@ -53,40 +55,60 @@
   }
 
   var gallery_waterfall = "undefined";
-  if (theme.gallery_waterfall.enable) {
+  if (theme.gallery_waterfall && theme.gallery_waterfall.enable) {
     gallery_waterfall = JSON.stringify(theme.gallery_waterfall);
   }
 
   var lazyload = "undefined";
-  if (theme.lazyload.enable) {
+  if (theme.lazyload && theme.lazyload.enable) {
     lazyload = JSON.stringify(theme.lazyload);
   }
 
   var zoom_image = "undefined";
-  if (theme.zoom_image.enable) {
+  if (theme.zoom_image && theme.zoom_image.enable) {
     zoom_image = JSON.stringify(theme.zoom_image);
   }
 
   var pjax_config = "undefined";
-  if (theme.pjax.enable) {
+  if (theme.pjax && theme.pjax.enable) {
     pjax_config = JSON.stringify({
       scrollTo2screen: theme.pjax.scrollTo2screen
     });
   }
 
   var external_link = "undefined";
-  if (theme.external_link.icon.enable) {
-    external_link = JSON.stringify({
-      icon: {
-        enable: theme.external_link.icon.enable,
-        name: theme.external_link.icon.name
+  if (theme.external_link) {
+    var iconConfig = {};
+    var iconEnable = false;
+    var iconName = '';
+
+    if (theme.external_link.icon) {
+      iconEnable = theme.external_link.icon.enable;
+
+      if (iconEnable) {
+        iconName = theme.external_link.icon.name;
       }
+
+      iconConfig = { enable: iconEnable, name: iconName }
+    }
+
+    external_link = JSON.stringify({
+      icon: iconConfig
     });
   }
 
-  var shortcuts = JSON.stringify({
-    switch_post: theme.shortcuts.switch_post.enable
-  });
+  var shortcuts = "undefined";
+  if (theme.shortcuts) {
+    isSwitchPost = false;
+
+    if (theme.shortcuts.switch_post && theme.shortcuts.switch_post.enable) {
+      isSwitchPost = true;
+    }
+
+    shortcuts = JSON.stringify({
+      switch_post: isSwitchPost
+    });
+  }
 
   var prompt = JSON.stringify({
     copy_success: __("prompt.copy.success"),

layout/_partials/head/head.pug

@@ -78,13 +78,13 @@ if theme.fancybox
   - if (theme.cdn.fancybox_css) fancybox_css = theme.cdn.fancybox_css
   link(rel="stylesheet" href=fancybox_css type="text/css")
 
-if page.comments || theme.pjax.enable
+if page.comments || (theme.pjax && theme.pjax.enable)
   if theme.gitalk && theme.gitalk.enable
     - var gitalk_css = "https://cdn.jsdelivr.net/npm/gitalk@latest/dist/gitalk.min.css"
     - if (theme.cdn.gitalk_css) gitalk_css = theme.cdn.gitalk_css
     link(rel="stylesheet" href=gitalk_css type="text/css")
 
-if theme.algolia_search.enable
+if theme.algolia_search && theme.algolia_search.enable
   - var instantsearch_css = "https://cdn.jsdelivr.net/npm/instantsearch.js@2.1.1/dist/instantsearch.min.css"
   - if (theme.cdn.instantsearch_css) instantsearch_css = theme.cdn.instantsearch_css
   link(rel="stylesheet" href=instantsearch_css type="text/css")

layout/_partials/header/header.pug

@@ -8,7 +8,7 @@ nav.header-nav
     div.header-nav-menu
       +menuItem(theme.menu)
 
-    if theme.algolia_search.enable || theme.local_search.enable
+    if (theme.algolia_search && theme.algolia_search.enable) || (theme.local_search && theme.local_search.enable)
       div.header-nav-search
         if !theme.menu_settings.text_only
           i(class=`${fa_prefix} fa-search`)
@@ -27,6 +27,6 @@ div.header-info(style=`${
     div.header-info-title= config.title
     div.header-info-subtitle= config.subtitle
 
-  if theme.header.scroll_down_icon && theme.header.scroll_down_icon.enable
+  if theme.header && theme.header.scroll_down_icon && theme.header.scroll_down_icon.enable
     div.header-info-scrolldown
       i.fa.fa-angle-down.header-info-scrolldown__icon

layout/_partials/search/index.pug

-if theme.algolia_search.enable
+if theme.algolia_search && theme.algolia_search.enable
   include ./algolia.pug
-else if theme.local_search.enable
+else if theme.local_search && theme.local_search.enable
   include ./localsearch.pug

layout/_third-party/comments/index.pug

-if page.comments || theme.pjax.enable
+if page.comments || (theme.pjax && theme.pjax.enable)
   if theme.disqus && theme.disqus.enable
     include ./disqus.pug
   else if theme.valine && theme.valine.enable

layout/_third-party/pjax.pug

@@ -53,7 +53,7 @@ script.
     document.addEventListener('pjax:send', function () {
       $('.header-nav-menu').removeClass('show');
 
-      if (CONFIG.pjax.scrollTo2screen) {
+      if (CONFIG.pjax && CONFIG.pjax.scrollTo2screen) {
         $('html').velocity('scroll', {
           duration: 500,
           offset: $('#header').height(),
@@ -95,9 +95,9 @@ script.
         $(this).parent().append($(this).remove());
       });
 
-      Stun.utils.pjaxReloadBoot();
-      Stun.utils.pjaxReloadScroll();
-      Stun.utils.pjaxReloadHeader();
-      Stun.utils.pjaxReloadSidebar();
+      Stun.utils.pjaxReloadBoot && Stun.utils.pjaxReloadBoot();
+      Stun.utils.pjaxReloadScroll && Stun.utils.pjaxReloadScroll();
+      Stun.utils.pjaxReloadHeader && Stun.utils.pjaxReloadHeader();
+      Stun.utils.pjaxReloadSidebar && Stun.utils.pjaxReloadSidebar();
     }, false);
   }, false);

layout/_third-party/search/algolia.pug

@@ -41,7 +41,7 @@ script.
 
     var algolia = CONFIG.algolia;
 
-    if (!(algolia.appId && algolia.apiKey && algolia.indexName)) {
+    if (!algolia && !(algolia.appId && algolia.apiKey && algolia.indexName)) {
       return console.error('Algolia setting is invalid.');
     }
 

layout/_third-party/search/index.pug

-if theme.algolia_search.enable
+if theme.algolia_search && theme.algolia_search.enable
   include ./algolia.pug
-else if theme.local_search.enable
+else if theme.local_search && theme.local_search.enable
   include ./localsearch.pug

scripts/filters/external-link.js

@@ -4,7 +4,7 @@
 
 hexo.extend.filter.register('after_post_render', function(data) {
   var theme = hexo.theme.config;
-  if (!theme.external_link.icon.enable) return;
+  if (!(theme.external_link && theme.external_link.icon && theme.external_link.icon.enable)) return;
 
   var url = require('url');
   var cheerio;

scripts/filters/lazyload.js

@@ -4,7 +4,7 @@
 
 hexo.extend.filter.register('after_post_render', function(data) {
   var theme = hexo.theme.config;
-  if (!theme.lazyload.enable) return;
+  if (!(theme.lazyload && theme.lazyload.enable)) return;
 
   var cheerio;
 

scripts/filters/shake-file.js

@@ -7,7 +7,7 @@ hexo.extend.filter.register('after_generate', () => {
 
   if (!theme.shake_file) return;
 
-  if (!theme.sidebar.enable) {
+  if (!(theme.sidebar && theme.sidebar.enable)) {
     hexo.route.remove('js/sidebar.js');
   }
 });

source/css/_variables/index.styl

@@ -29,7 +29,7 @@ $md-width = 992px - 0.02px
 $lg-width = 1200px - 0.02px
 
 // Width
-$sidebar-width        = convert(hexo-config('sidebar.width') || '280px')
+$sidebar-width          = convert(hexo-config('sidebar.width') || '280px')
 $content-aside-gap      = 20px
 $content-width          = $sm-width
 $main-sidebar-gap       = 30px

source/js/header.js

@@ -167,7 +167,7 @@ $(document).ready(function () {
   });
 
   Stun.utils.pjaxReloadHeader = function () {
-    if (CONFIG.header.scrollDownIcon) {
+    if (CONFIG.header && CONFIG.header.scrollDownIcon) {
       $('.header-info-scrolldown').on('click', function () {
         $('#container').velocity('scroll', {
           offset: $('#header').height()

source/js/scroll.js

@@ -42,6 +42,9 @@ $(document).ready(function () {
     prevScrollTop = scrollTop;
   }
 
+  // Initializaiton
+  headerNavScroll();
+
   function scrollHeadingToTop (anchor) {
     $(anchor)
       .velocity('stop')
@@ -51,6 +54,7 @@ $(document).ready(function () {
       });
   }
 
+  var isBack2topEnable = CONFIG.back2top && CONFIG.back2top.enable;
   var isBack2topShow = false;
 
   // Back the page to top.
@@ -71,19 +75,22 @@ $(document).ready(function () {
     }
   }
 
-  // Initialization
-  headerNavScroll();
-  back2top();
+  if (isBack2topEnable) {
+    // Initializaiton
+    back2top();
+
+    $('#back2top').on('click', function () {
+      $('body').velocity('stop').velocity('scroll');
+    });
+  }
 
-  $(window).on('DOMContentLoaded', back2top);
   $(window).on('scroll', Stun.utils.throttle(function () {
     headerNavScroll();
-    back2top();
-  }, 100));
 
-  $('#back2top').on('click', function () {
-    $('body').velocity('stop').velocity('scroll');
-  });
+    if (isBack2topEnable) {
+      back2top();
+    }
+  }, 100));
 
   Stun.utils.pjaxReloadScroll = function () {
     // Click the heading.

source/js/sidebar.js

 $(document).ready(function () {
-  var tocDepth = CONFIG.sidebar.renderTocDepth;
+  var tocDepth = (CONFIG.sidebar && CONFIG.sidebar.tocMaxDepth) || 4;
   // Optimize selector by theme config.
   var HEADING_SELECTOR = 'h1,h2,h3,h4,h5,h6,'.slice(0, tocDepth * 3).slice(0, -1);
 
@@ -97,7 +97,11 @@ $(document).ready(function () {
   }
 
   // Distance from sidebar to top.
-  var SIDEBAR_STICKY_TOP = parseInt(CONFIG.sidebar.offsetTop);
+  var sidebarToTop = 0;
+
+  if (CONFIG.sidebar && CONFIG.sidebar.offsetTop) {
+    sidebarToTop = parseInt(CONFIG.sidebar.offsetTop);
+  }
 
   // Sticky the sidebar when it arrived the top.
   function sidebarSticky () {
@@ -105,7 +109,7 @@ $(document).ready(function () {
     var targetY =
       document.getElementById('main').getBoundingClientRect().top;
 
-    if (targetY < SIDEBAR_STICKY_TOP) {
+    if (targetY < sidebarToTop) {
       $sidebar.addClass('sticky');
     } else {
       $sidebar.removeClass('sticky');

source/js/stun-boot.js

 $(document).ready(function () {
   Stun.utils.showThemeInConsole();
-  CONFIG.shortcuts.switch_post && Stun.utils.registerHotkeyToSwitchPost();
+
+  if (CONFIG.shortcuts && CONFIG.shortcuts.switch_post) {
+    Stun.utils.registerHotkeyToSwitchPost();
+  }
 
   // Not reload this, because it's changeless.
   if (CONFIG.external_link) {
@@ -16,9 +19,9 @@ $(document).ready(function () {
     CONFIG.gallery_waterfall && this.showImageToWaterfall();
 
     if (CONFIG.external_link) {
-      var WRAPPER = '.archive, .post-header-title';
+      var CONTAINER = '.archive, .post-header-title';
 
-      this.addIconToExternalLink(WRAPPER);
+      this.addIconToExternalLink(CONTAINER);
     }
 
     if (CONFIG.fancybox) {

source/js/utils.js

@@ -261,7 +261,7 @@ Stun.utils = Stun.$u = {
       $('.stun-message').remove();
     }
 
-    var faPrefix = CONFIG.fontawesome.prefix;
+    var faPrefix = (CONFIG.fontawesome && CONFIG.fontawesome.prefix) || 'fa';
     var $alert = $(
       '<div class="stun-message">' +
         '<div class="stun-alert stun-alert-' + status + '">' +
@@ -398,7 +398,7 @@ Stun.utils = Stun.$u = {
       return;
     }
 
-    var faPrefix = CONFIG.fontawesome.prefix;
+    var faPrefix = (CONFIG.fontawesome && CONFIG.fontawesome.prefix) || 'fa';
     var $wrapper = $('<span class="external-link"></span>');
     var $icon = $(
       '<i class="' + faPrefix + ' fa-' +
@@ -539,7 +539,7 @@ Stun.utils = Stun.$u = {
       }
     });
 
-    var faPrefix = CONFIG.fontawesome.prefix;
+    var faPrefix = (CONFIG.fontawesome && CONFIG.fontawesome.prefix) || 'fa';
     var $copyIcon = $(
       '<div class="copy-button" data-popover=' +
         CONFIG.prompt.copy_button +