Initial commit

README.md

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 # d12-moodle-shortcodes
 A filter that adds WordPress-like shortcodes to Moodle
+
+## What this filter does
+This filter allows you to use a shortcode, such as `[wi]` to dynamically add content to Moodle blocks and activities.
+
+## How to install this filter
+1. Upload the entire directory to the `moodle/filter` directory.
+1. Make sure the plugin directory and enclosed files have the same permissions as other filters. (Use their permission scheme as a reference.)
+1. Go to Site Administration >> Notifications and upgrade your database.
+1. Go to Site Administration >> Plugins >> Filters >> Manage Filters and activate the plugin.
+
+## How to use this filter
+This filter is preset to use `[wi]` to add `<div class="wi">`, and `[/wi]` to add `</div>`.
+
+You will need to go to the custom CSS area of your theme and define a style for `.wi` css class.
+
+## How to adapt this filter
+This filter uses the php function `str_replace` to replace the shortcode with your desired text. The basic formula is
+
+    str_replace (
+        'text to replace',
+        'text to replace it with',
+        $string_to_replace_text_in
+        )
+
+Both `text to replace` and `text to replace it with` will accept arrays, so you can define a lot of shortcodes in a single function. I have not yet tested performance when adding many shortcodes.

filter.php

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+<?php
+
+class filter_d12shortcodes extends moodle_text_filter {
+    public function filter($text, array $options = array()) {
+        return str_replace(
+			array('[wi]', '[/wi]'),
+			array('<div class="wi">', '</div>'),
+			$text
+			);
+	}
+}

lang/en/filter_d12shortcodes.php

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+<?php
+ 
+$string['filtername'] = 'd12 Shortcodes';

version.php

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+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Version details
+ *
+ * @package    filter
+ * @subpackage censor
+ * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$plugin->version   = 2016051500;        // The current plugin version (Date: YYYYMMDDXX)
+$plugin->requires  = 2016050500;        // Requires this Moodle version
+$plugin->component = 'filter_d12shortcodes';   // Full name of the plugin (used for diagnostics)