release: 2.0.0

.eslintignore

@@ -0,0 +1,2 @@
+coverage/
+tmp/

.eslintrc

@@ -0,0 +1,3 @@
+{
+    "extends": "hexo"
+}

.gitignore

@@ -0,0 +1,6 @@
+
+.DS_Store
+node_modules/
+package-lock.json
+tmp/
+*.log

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -0,0 +1,12 @@
+sudo: false
+language: node_js
+node_js:
+  - "8"
+  - "10"
+  - "node" # latest stable Node.js release
+
+cache: npm
+
+script:
+  - npm install
+  - npm run eslint

README.md

@@ -1,2 +1,34 @@
 # hexo-filter-nofollow
+
+[![npm version](https://badge.fury.io/js/hexo-filter-nofollow.svg)](https://www.npmjs.com/package/hexo-filter-nofollow)
+[![npm license](https://img.shields.io/npm/l/hexo-filter-nofollow)](./LICENSE)
+[![travis status](https://api.travis-ci.com/hexojs/hexo-filter-nofollow.svg?branch=master)](https://travis-ci.com/hexojs/hexo-filter-nofollow)
+![npm download](https://img.shields.io/npm/dt/hexo-filter-nofollow)
+
 Add nofollow attribute to all external links automatically.
+
+`hexo-filter-nofollow` add `rel="external nofollow noreferrer"` to all external links for security, privacy and SEO. [Read more](https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types).
+
+## Installations
+
+```bash
+$ npm i hexo-filter-nofollow --save
+```
+
+## Options
+
+```yaml
+nofollow:
+  enable: true
+  field: site
+  exclude:
+    - 'exclude1.com'
+    - 'exclude2.com'
+```
+
+- **enable** - Enable the plugin. Default value is `false`.
+- **field** - The scope you want the plugin to proceed, can be 'site' or 'post'. Default value is `site`.
+  - 'post' - Only add nofollow attribute to external links in your post content
+  - 'site' - Add nofollow attribute to external links of whole sites
+- **exclude** - Exclude hostname. Specify subdomain when applicable, including `www`.
+  - 'exclude1.com' does not apply to `www.exclude1.com` nor `en.exclude1.com`.

index.js

@@ -0,0 +1,15 @@
+/* global hexo */
+
+'use strict';
+
+if (hexo.config.nofollow && hexo.config.nofollow.enable) {
+  const config = hexo.config.nofollow;
+
+  if (!config.field) config.field = 'site';
+
+  if (config.field === 'post') {
+    hexo.extend.filter.register('after_post_render', require('./lib/filter'));
+  } else {
+    hexo.extend.filter.register('after_render:html', require('./lib/filter'));
+  }
+}

lib/filter.js

@@ -0,0 +1,55 @@
+'use strict';
+
+const { parse } = require('url');
+
+function isExternal(url, config) {
+  let exclude = config.nofollow.exclude;
+  const data = parse(url);
+  const host = data.hostname;
+  const sitehost = parse(config.url).hostname || config.url;
+
+  if (!data.protocol || !sitehost) return false;
+
+  if (exclude && !Array.isArray(exclude)) exclude = [exclude];
+
+  if (exclude && exclude.length) {
+    for (const i of exclude) {
+      if (sitehost === i) return false;
+    }
+  }
+
+  if (host !== sitehost) return true;
+
+  return false;
+}
+
+module.exports = function(data) {
+  const hexo = this;
+  const config = hexo.config;
+
+  const filterExternal = (data) => {
+    const noFollow = 'external nofollow noreferrer';
+
+    return data.replace(/<a.*?(href=['"](.*?)['"]).*?>/gi, (str, hrefStr, href) => {
+      if (!isExternal(href, hexo.config)) return str;
+
+      if (/rel=/gi.test(str)) {
+        return str.replace(/rel="(.*?)"/gi, (relStr, rel) => {
+          // Avoid duplicate attribute
+          if (!/(external|nofollow|noreferrer)/gi.test(rel)) relStr = relStr.replace(rel, `${rel} ${noFollow}`);
+          return relStr;
+        });
+      }
+
+      return str.replace(hrefStr, `${hrefStr} rel="${noFollow}"`);
+    });
+  };
+
+  if (config.nofollow.field === 'post') {
+    data.content = filterExternal(data.content);
+  } else {
+    data = filterExternal(data);
+  }
+
+  return data;
+};

package.json

@@ -0,0 +1,38 @@
+{
+  "name": "hexo-filter-nofollow",
+  "version": "2.0.0",
+  "description": "Add nofollow attribute to all external links automatically",
+  "main": "index.js",
+  "directories": {
+    "lib": "./lib"
+  },
+  "files": [
+    "lib/",
+    "index.js"
+  ],
+  "engines": {
+    "node": ">= 8.6.0"
+  },
+  "scripts": {
+    "eslint": "eslint .",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": "hexojs/hexo-filter-nofollow",
+  "keywords": [
+    "hexo",
+    "seo",
+    "hexo-plugin",
+    "hexo-filter",
+    "nofollow"
+  ],
+  "author": "SukkaW <isukkaw@gmail.com> (https://skk.moe)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/hexojs/hexo-filter-nofollow/issues"
+  },
+  "homepage": "https://github.com/hexojs/hexo-filter-nofollow#readme",
+  "devDependencies": {
+    "eslint": "^6.2.2",
+    "eslint-config-hexo": "^3.0.0"
+  }
+}