Initial

README.md

-# muraselon-currency-shortcode
+#Muraselon Currency ShortCode
+* Description: Injects a small javascript snippet by way of shortcode [muraseloncurrency]
 

js/editor-muraseloncurrency-button.js

+(function() {
+    tinymce.PluginManager.add('muraseloncurrency_shortcode_button', function( editor, url ) {
+        editor.addButton( 'muraseloncurrency_shortcode_button', {
+            text: '[MUSCUR]',
+            icon: false,
+            onclick: function() {
+                editor.insertContent('[muraseloncurrency]');
+            }
+        });
+    });
+})();

muraselon-currency-shortcode.php

+<?php
+/*
+ * Plugin Name: Muraselon Currency ShortCode
+ * Description: Injects a small javascript snippet by way of shortcode [muraseloncurrency]
+ * Version: 1.0
+ * Author: Danny Froberg <[email protected]>
+ * Author URI: https://www.froberg.org
+ * GitLab Plugin URL: https://gitlab.froberg.org/plugins/muraselon-currency-shortcode.git
+*/
+add_action('admin_head', 'daf_add_shortcode_muraseloncurrency_button');
+
+function daf_add_shortcode_muraseloncurrency_button() {
+	global $typenow;
+	if ( !current_user_can('edit_posts') && !current_user_can('edit_pages') ) {
+		return;
+	}
+	if( ! in_array( $typenow, array( 'post', 'page' ) ) )
+		return;
+	if ( get_user_option('rich_editing') == 'true') {
+		add_filter('mce_external_plugins', 'daf_muraseloncurrency_add_tinymce_plugin');
+		add_filter('mce_buttons', 'daf_muraseloncurrency_register_tinymce_plugin');
+	}
+}
+
+function daf_muraseloncurrency_add_tinymce_plugin($plugin_array) {
+	$plugin_array['muraseloncurrency_shortcode_button'] = plugin_dir_url( __FILE__ ) . '/js/editor-muraseloncurrency-button.js';
+	return $plugin_array;
+}
+
+function daf_muraseloncurrency_register_tinymce_plugin($buttons) {
+	array_push($buttons, "muraseloncurrency_shortcode_button");
+	return $buttons;
+}
+
+function daf_muraselon_currency(){
+		return <<<ENDOFSNIPPET
+<script type="text/javascript" src="https://sp-today.com/spwidget.php?city=damas&fields=USD%2CEUR%2CTRY"></script>
+ENDOFSNIPPET;
+}
+add_shortcode('muraseloncurrency', 'daf_muraselon_currency');