This plugin now only works with Twig PatternEngine. You can use old 0.x versions of the plugin for Mustache PatternEngine.

To install and use the plugin run:

composer require aleksip/plugin-data-transform

Pattern Lab core only supports global data files and a pattern-specific data file for the main pattern. This plugin adds pattern-specific data file support for included patterns.

Currently the plugin provides four transform functions for the data read by Pattern Lab. The examples provided are in JSON but Pattern Lab supports YAML too!

If a value contains the name of a pattern in shorthand partials syntax, the plugin will replace the value with the rendered pattern:

{ "key": "atoms-form-element-label.html" }

Advanced syntax with support for passing variables and disabling access to the default data:

{ "key": { "include()": { "pattern": "atoms-form-element-label.html", "with": { "title": "Textfield label" }, "only": true } } }

In both examples the value of key will replaced with the rendered pattern.

{ "key": { "join()": [ "molecules-comment.html", "<div class=\"indented\">", "molecules-comment.html", "</div>", "molecules-comment.html" ] } }

The value of key will be replaced with the joined strings. Note that in the example molecules-comment.html is the name of a pattern in shorthand partials syntax. These will be replaced with the rendered pattern before the join.

{ "key": { "Attribute()": { "id": ["edit-submit"], "type": ["submit"], "value": ["Submit"], "class": ["button", "button-primary"] } } }

The value of key will be replaced with an Attribute object.

{ "key": { "Url()": { "url": "http://example.com", "options": { "attributes": { "Attribute()": { "class": ["link"] } } } } } }

The value of key will be replaced with an Url object. Note that in the example attributes will be replaced with an Attribute object before the Url object is created.

Please note that global data from the _data directory is considered to be pattern-specific data and will overwrite data inherited from a parent pattern. If you want to override data of an included pattern you can use the with keyword.

Most features provided by this plugin are used in Shila Drupal theme.