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This plugin is primarily targeted at being used with Mephisto but should be useful with other Rails based CMS or blogging plattforms, too.
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PLEASE NOTE I've imported this repository to GitHub because I still receive
requests related to it. I do not intend to further maintain it actively. If
you are interested in working on the code I will happily give you full access
to the repository, just drop me a note ( or send me
a GitHub message). I also might help you out with advise or pointers but I
sadly can not invest tons of time into it.

# Google Analytics Plugin (blue egg edition)

This plugin is primarily targeted at being used with Mephisto but should be
useful with other Rails based CMS or blogging plattforms, too.

# Installation and configuration

Install the plugin like this:

  script/plugin install git://

Once the plugin is installed you have to specify your Google Analytics ID in 
vendor/plugins/google_analytics/init.rb: = 'UA-12345-67'

If you want to enable the plugin in development mode, you can do this with:

  GoogleAnalytics.environments << 'development'

# Usage

Once installed and configured the integration with Google Analytics should
already work.

It will unconditionally use the href attribute of every link (that doesn't
already have any onclick attribute) for the urchinTracker onclick hook:

  <a href="/path/to/article" onclick="urchinTracker('/path/to/article')">My article</a>

# Liquid filter and content filter

You might want to fine-tune or group some of your links, though. To help you
with this the plugin provides a couple of tools:

First there's a filter for both your Liquid templates and the dynamic content
that you publish (e.g. your blog posts). Both have the same interface and
functionality but look a little different.

The Liquid filter looks like this:

  {{ "<a href="path/to/article">My article</a>" | google_analytics }} or:
  {{ article | link_to_article | google_analytics }}

And the Content filter (technically speaking: the FilteredColumn macro) looks
like this:

  <filter:google_analytics><a href="path/to/article">My article</a></filter:google_analytics>

In their most basic form (like above) these filters just use the href
attribute and add it to the urchinTracker call.

But you can provide a token to the filter to change the parameter that's
handed to the urchinTracker.

For example, imagine you'd want to track your downloads under a common
"download" namespace:

  {{ "<a href="path/to/">Download</a>" | google_analytics : "downloads/$1" }}

or for your dynamic content:

  <filter:google_analytics token="downloads/$1"><a href="path/to/">My article</a></filter:google_analytics>

This will change the output like this:

  <a href="/path/to/" onclick="urchinTracker('download/path/to/')">My article</a>

# Global regular expression mapping

The filters described above are quite powerful but, of course, they require
that you use the for every link individually. Maybe you want a more generic
solution that spares you the hassle of adding the filter again and again in
your blog posts.

To accomplish this there's another, even more powerful feature that allows you
to specify a global mapping that defines regular expressions and tokens.

The regular expressions will be applied to the href attributes of your links
and if they match, the token will be used to modify the value of the href
attribute accordingly before it's passed to the urchinTracker.

Imagine that you want to track all your outgoing links under a common
namespace "external". Assuming that all of your internal links don't use
absolute URLs (i.e. don't start with "http"), you could use the following map.
The place where you would define this is the init.rb file of the
GoogleAnalytics plugin.

  GoogleAnalytics.map_regexps = { /^http.*$/ => 'external/$1' }    

This would result in links like the following for all URLs that start with

  <a href="" onclick="urchinTracker('extern/')">Somewhere else</a>

Note that the regular expression matches the whole URL. This is important in
this case because the $1 references the first match returned by the regular

Accordingly you can use further matches in your token. This way you can do
some quite powerful modifications on your URLs when you know how to craft a
regular expression in the correct way.

Imagine that you want to track all your document downloads under the namespace
"documents", but you also want to group them further by their file type. You
could do that with a regular expression mapping like this:

  GoogleAnalytics.map_regexps = { /[^.\/]*\.(doc|pdf|txt)$/ => 'documents/$2/$1' }

Again, the first match of the regular expression is the whole URL, so it will
be inserted for $1. But additionally the regular expression also matches the
file extension which will therefor be inserted for $2.

Thus, you'd get a link like this:

  <a href="/path/to/document.pdf" onclick="urchinTracker('documents/pdf//path/to/document.pdf')">Read this!</a>

# Javascript parsing

If you do not want Google Analytics onclick attributes to be present in the
static HTML but instead have them added through javascript dynamically you can
set the following option to true.

Note that this is currently limited in that the map_regexps feature described
below won't be used.

  GoogleAnalytics.use_javascript_links = true

# Credits

The plugin was initially based on Graeme Mathieson's Google Analytics Plugin
( but has evolved greatly
from that by now. Some of the config options etc. remain the same.

Special thanks go to Eran Ben Sabat ( who asked me to build
this plugin, thoroughly tested every single move I made, contributed code and
provided tons of feedback, ideas and deliberate discussion.

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