Merge pull request #147 from mediocre/amazon-affiliate-links

initial commit

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.57.0] - 2024-12-04
+### Added
+- Added support for amazon.com affiliate links
+
 ## [2.56.0] - 2024-11-26
 ### Added
 - Added support for <video> tag rendering for .mp4 and .webm links

lib/index.js

@@ -706,6 +706,7 @@ exports.render = function(markdown, options, callback) {
             md.linkify.tlds('horse', true);
             md.linkify.tlds('deals', true);
 
+            md.use(require('./plugins/amazon'));
             md.use(require('./plugins/anchors'), { suffix: options.id });
             md.use(require('./plugins/appleMusic'));
             md.use(require('./plugins/audio'));
@@ -786,6 +787,26 @@ exports.render = function(markdown, options, callback) {
             }, function() {
                 callback();
             });
+        },
+        // https://github.com/markdown-it/markdown-it/issues/1031
+        function _urlEncodeFix(callback) {
+            const aElements = exports.html.getElementsByTagName(html, 'a');
+
+            if (!aElements?.length) {
+                return callback();
+            }
+
+            aElements.forEach(aElement => {
+                const href = exports.html.getAttributeValue(aElement, 'href');
+
+                if (!href?.includes('&')) {
+                    return;
+                }
+
+                html = html.replaceAll(`href="${href}"`, `href="${href.replaceAll('&', '&')}"`);
+            });
+
+            return callback();
         }
     ], function(err) {
         if (err) {

lib/plugins/amazon.js

@@ -0,0 +1,29 @@
+const regExp = /https?:\/\/(?:[a-z0-9-]+\.)?amazon\.com(?:\/[^\s]*)?(?=\s|$)/i;
+
+module.exports = function(md) {
+    const defaultRender = md.renderer.rules.link_open || function(tokens, idx, options, env, self) {
+        return self.renderToken(tokens, idx, options);
+    };
+
+    md.renderer.rules.link_open = function(tokens, idx, options, env, self) {
+        const openToken = tokens[idx];
+        const hrefIndex = openToken.attrIndex('href');
+
+        // Ensure we have an "href" attribute
+        if (hrefIndex !== -1) {
+            const href = openToken.attrs[hrefIndex][1];
+
+            // Ensure we have an "href" attribute value that matches the Amazon URL pattern
+            if (href && regExp.test(href)) {
+                const url = new URL(href);
+
+                if (!url.searchParams.has('tag')) {
+                    url.searchParams.set('tag', 'mehdown-20');
+                    openToken.attrs[hrefIndex][1] = url.toString();
+                }
+            }
+        }
+
+        return defaultRender(tokens, idx, options, env, self);
+    };
+};

package.json

@@ -1,6 +1,6 @@
 {
     "dependencies": {
-        "async": "~3.2.0",
+        "async": "~3.2.6",
         "emoji-toolkit": "~6.6.0",
         "flip": "~1.0.0",
         "lolspeak": "~1.4.0",
@@ -10,7 +10,7 @@
         "natural": "~5.2.4",
         "probe-image-size": "~7.2.0",
         "rel-to-abs": "~0.1.0",
-        "request": "~2.88.0",
+        "request": "~2.88.2",
         "roll": "~1.3.1",
         "shell-quote": "~1.8.0",
         "slug": "~9.0.0",
@@ -33,5 +33,5 @@
         "coveralls": "nyc npm test && nyc report --reporter=text-lcov | coveralls",
         "test": "mocha --reporter spec test/*"
     },
-    "version": "2.56.0"
+    "version": "2.57.0"
 }

test/index.js

@@ -971,7 +971,7 @@ describe('links', function() {
     // https://github.com/mediocre/mehdown/issues/39
     it('URLs that happen to have Emoji shortnames should be linked correctly', function(done) {
         mehdown.render('http://www.ebay.com/itm/GOgroove-BlueSYNC-OR3-Portable-Wireless-Bluetooth-Speaker-Splatter-Edition-/351328294837?var=&hash=item51cccc57b5:m:mLzVeDaMfRlxsCqFiutY-aw', function(err, html) {
-            assert.strictEqual(html, '<p><a href="http://www.ebay.com/itm/GOgroove-BlueSYNC-OR3-Portable-Wireless-Bluetooth-Speaker-Splatter-Edition-/351328294837?var=&amp;hash=item51cccc57b5:m:mLzVeDaMfRlxsCqFiutY-aw">http://www.ebay.com/itm/GOgroove-BlueSYNC-OR3-Portable-Wireless-Bluetooth-Speaker-Splatter-Edition-/351328294837?var=&amp;hash=item51cccc57b5:m:mLzVeDaMfRlxsCqFiutY-aw</a></p>');
+            assert.strictEqual(html, '<p><a href="http://www.ebay.com/itm/GOgroove-BlueSYNC-OR3-Portable-Wireless-Bluetooth-Speaker-Splatter-Edition-/351328294837?var=&hash=item51cccc57b5:m:mLzVeDaMfRlxsCqFiutY-aw">http://www.ebay.com/itm/GOgroove-BlueSYNC-OR3-Portable-Wireless-Bluetooth-Speaker-Splatter-Edition-/351328294837?var=&amp;hash=item51cccc57b5:m:mLzVeDaMfRlxsCqFiutY-aw</a></p>');
             done();
         });
     });

test/plugins/amazon.js

@@ -0,0 +1,69 @@
+const assert = require('assert');
+
+const mehdown = require('../../lib');
+
+describe('amazon', function() {
+    it('https://www.amazon.com/dp/B0D3VQ6MH5', function(done) {
+        mehdown.render('https://www.amazon.com/dp/B0D3VQ6MH5', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?tag=mehdown-20">https://www.amazon.com/dp/B0D3VQ6MH5</a></p>');
+            done();
+        });
+    });
+
+    it('https://www.amazon.com/dp/B0D3VQ6MH5?th=1', function(done) {
+        mehdown.render('https://www.amazon.com/dp/B0D3VQ6MH5?th=1', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?th=1&tag=mehdown-20">https://www.amazon.com/dp/B0D3VQ6MH5?th=1</a></p>');
+            done();
+        });
+    });
+
+    it('https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar', function(done) {
+        mehdown.render('https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar&tag=mehdown-20">https://www.amazon.com/dp/B0D3VQ6MH5?th=1&amp;foo=bar</a></p>');
+            done();
+        });
+    });
+
+    it('https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace', function(done) {
+        mehdown.render('https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace">https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace</a></p>');
+            done();
+        });
+    });
+
+    it('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5)', function(done) {
+        mehdown.render('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5)', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?tag=mehdown-20">amazon link</a></p>');
+            done();
+        });
+    });
+
+    it('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?th=1)', function(done) {
+        mehdown.render('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?th=1)', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?th=1&tag=mehdown-20">amazon link</a></p>');
+            done();
+        });
+    });
+
+    it('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar)', function(done) {
+        mehdown.render('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar)', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?th=1&foo=bar&tag=mehdown-20">amazon link</a></p>');
+            done();
+        });
+    });
+
+    it('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace)', function(done) {
+        mehdown.render('[amazon link](https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace)', function(err, html) {
+            assert.ifError(err);
+            assert.strictEqual(html, '<p><a href="https://www.amazon.com/dp/B0D3VQ6MH5?tag=donotreplace">amazon link</a></p>');
+            done();
+        });
+    });
+});

test/plugins/youtube.js

@@ -54,7 +54,7 @@ describe('youtube', function() {
 
     it('[text](http://www.youtube.com/watch?v=kU9MuM4lP18&start=10&end=20)', function(done) {
         mehdown.render('[text](http://www.youtube.com/watch?v=kU9MuM4lP18&start=10&end=20)', function(err, html) {
-            assert.equal(html, '<p><a href="http://www.youtube.com/watch?v=kU9MuM4lP18&amp;start=10&amp;end=20">text</a></p>');
+            assert.equal(html, '<p><a href="http://www.youtube.com/watch?v=kU9MuM4lP18&start=10&end=20">text</a></p>');
             done();
         });
     });