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POReplace URLs (with links) BUT within text that already has some links defined
 

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  1. POReplace URLs (with links) BUT within text that already has some links defined
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    <p>I reviewed the answers to the basic question in this link: <a href="https://stackoverflow.com/questions/37684/how-to-replace-plain-urls-with-links/7138764#7138764">How to replace plain URLs with links?</a> and have decided to use the code from what <a href="https://stackoverflow.com/users/725349/christian-koch">Christian Koch</a> suggested, but it only partially covers what I need to do. I am hoping someone here can help me out.</p> <p>The code Christian Koch supplied works great with one exception - When I have text that already contains links and just plain text, those links are getting a double 'a' tag, therefore causing html problems that make the text not appear right in the browser.</p> <p>For instance the code works fine for this:</p> <pre><code> www.yahoo.com is a website just like http://www.google.com </code></pre> <p>I see the yahoo and google text now appear as links and both have a link wrapper around them just as I would expect:</p> <pre><code> &lt;a href="http://www.yahoo.com"&gt;www.yahoo.com&lt;/a&gt; is a website just like &lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt; </code></pre> <p>Now take this text (contains basic text and a link already defined):</p> <pre><code> www.yahoo.com is a website just like &lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt; </code></pre> <p>When using the code supplied, the yahoo link is correct, but the google link now has a double tag:</p> <pre><code> &lt;a href="http://www.yahoo.com"&gt;www.yahoo.com&lt;/a&gt; is a website just like &lt;a href="&lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt;" target="_blank"&gt;&lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt;&lt;/a&gt; </code></pre> <p><strong>Can someone please help me get the pattern correct so that when the text already contains a link, the pattern ignores it, but still replaces the other text without a tag. I only want the pattern to do the replacing if and only if the text is not already contained in a link tag.</strong></p> <p>Here is the code i am using from the other post:</p> <pre><code> doLinks: function(originalText) { // http://, https://, ftp:// var urlPattern = /\b(?:https?|ftp):\/\/[a-z0-9-+&amp;@#\/%?=~_|!:,.;]*[a-z0-9-+&amp;@#\/%=~_|]/gim; // www. sans http:// or https:// var pseudoUrlPattern = /(^|[^\/])(www\.[\S]+(\b|$))/gim; // Email addresses *** here I've changed the expression *** var emailAddressPattern = /(([a-zA-Z0-9_\-\.]+)@[a-zA-Z_]+?(?:\.[a-zA-Z]{2,6}))+/gim; return originalText .replace(urlPattern, '&lt;a target="_blank" href="$&amp;"&gt;$&amp;&lt;/a&gt;') .replace(pseudoUrlPattern, '$1&lt;a target="_blank" href="http://$2"&gt;$2&lt;/a&gt;') .replace(emailAddressPattern, '&lt;a target="_blank" href="mailto:$1"&gt;$1&lt;/a&gt;'); } </code></pre>
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