Bug #18, add [theme] shortcode plugin, for LD case-study [iet:7844079]

theme-shortcode.php

@@ -0,0 +1,40 @@
+<?php namespace IET_OU\WP_Generic_Plugins;
+
+/**
+ * Plugin Name: Theme shortcode
+ * Plugin URI:
+ * Description: Shortcode to insert images from a theme, via shortcode - ` [theme alt=".." src="example/image.png"] `
+ * Author:      Nick Freear
+ * Author URI:  https://github.com/nfreear
+ * Version:     1.0-alpha
+ *
+ * @copyright   © 2017 The Open University (UK).
+ * @author      Nick Freear, 24 January 2017.
+ */
+
+// http://wordpress.stackexchange.com/questions/66026/how-do-i-reference-the-theme-path-in-pages-for-images
+
+class Theme_Shortcode_Plugin {
+
+	const SHORTCODE = 'theme';
+	const PATH = '/wp-content/themes/tttt-guide/images';
+	const TPL_IMAGE = '<img class="theme-sc x" src="%s/images/%s" alt="%s" />';
+
+	public function __construct() {
+		add_shortcode( self::SHORTCODE, [ &$this, 'shortcode' ] );
+	}
+
+	public function shortcode( $attrs = [], $content = null ) {
+		$inp = (object) shortcode_atts( [
+				'src' => null,
+				'alt' => null,
+		], $attrs );
+
+		$theme_uri = is_child_theme()
+				? get_stylesheet_directory_uri()
+				: get_template_directory_uri();
+
+		return sprintf( self::TPL_IMAGE, $theme_uri, $inp->src, $inp->alt );
+	}
+}
+$plugin = new Theme_Shortcode_Plugin();