Validate URLs before converting text to a link (#66)

Author: ipc103

src/paste-markdown-link.ts

@@ -33,7 +33,7 @@ function onPaste(event: ClipboardEvent) {
   event.stopPropagation()
   event.preventDefault()
 
-  insertText(field, linkify(selectedText, text))
+  insertText(field, linkify(selectedText, text.trim()))
 }
 
 function hasPlainText(transfer: DataTransfer): boolean {
@@ -55,7 +55,15 @@ function linkify(selectedText: string, text: string): string {
   return `[${selectedText}](${text})`
 }
 
-const URL_REGEX = /https?:\/\/(www\.)?[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\/?\s*?$/i
 function isURL(url: string): boolean {
-  return URL_REGEX.test(url)
+  try {
+    //eslint-disable-next-line no-restricted-syntax
+    const parsedURL = new URL(url)
+    return removeTrailingSlash(parsedURL.href).trim() === removeTrailingSlash(url).trim()
+  } catch {
+    return false
+  }
+}
+function removeTrailingSlash(url: string) {
+  return url.endsWith('/') ? url.slice(0, url.length - 1) : url
 }

test/test.js

@@ -51,6 +51,57 @@ describe('paste-markdown', function () {
       assert.equal(textarea.value, 'The examples can be found [here](https://www.github.com/).')
     })
 
+    it('creates a markdown link for longer urls', function () {
+      // eslint-disable-next-line i18n-text/no-en
+      textarea.value = 'The examples can be found here.'
+      textarea.setSelectionRange(26, 30)
+      paste(textarea, {'text/plain': 'https://www.github.com/path_to/something-different/too'})
+      assert.equal(
+        textarea.value,
+        'The examples can be found [here](https://www.github.com/path_to/something-different/too).'
+      )
+    })
+
+    it('creates a markdown link with query string', function () {
+      // eslint-disable-next-line i18n-text/no-en
+      textarea.value = 'The examples can be found here.'
+      textarea.setSelectionRange(26, 30)
+      paste(textarea, {'text/plain': 'https://www.github.com/path/to/something?query=true'})
+      assert.equal(
+        textarea.value,
+        'The examples can be found [here](https://www.github.com/path/to/something?query=true).'
+      )
+    })
+
+    it('creates a markdown link with hash params', function () {
+      // eslint-disable-next-line i18n-text/no-en
+      textarea.value = 'The examples can be found here.'
+      textarea.setSelectionRange(26, 30)
+      paste(textarea, {'text/plain': 'https://www.github.com/path/to/something#section'})
+      assert.equal(
+        textarea.value,
+        'The examples can be found [here](https://www.github.com/path/to/something#section).'
+      )
+    })
+
+    it('creates a link for http urls', function () {
+      // eslint-disable-next-line i18n-text/no-en
+      textarea.value = 'Look over here please'
+      textarea.setSelectionRange(10, 14)
+      const url = 'http://someotherdomain.org/another/thing'
+      paste(textarea, {'text/plain': url})
+      assert.equal(textarea.value, `Look over [here](${url}) please`)
+    })
+
+    it('creates a link when copied content includes spaces and a newline', () => {
+      // eslint-disable-next-line i18n-text/no-en
+      textarea.value = 'Look over here please'
+      textarea.setSelectionRange(10, 14)
+      const url = 'http://someotherdomain.org/another/thing            \n'
+      paste(textarea, {'text/plain': url})
+      assert.equal(textarea.value, `Look over [here](${url.trim()}) please`)
+    })
+
     it("doesn't paste a markdown URL when pasting over a selected URL", function () {
       // eslint-disable-next-line i18n-text/no-en
       textarea.value = 'The examples can be found here: https://docs.github.com'