A sample WordPress plugin - for evaluation of code refactoring

ig-sample-plugin.php

<?php
/*
Plugin Name: iG: Sample Plugin
Plugin URI: http://igeek.info/
Description: This is a sample plugin for code evaluation only
Version: 1.0
Author: Amit Gupta
License: GPL v2
*/


add_action( 'init', 'initialize_plugin' );

function initialize_plugin() {
	//check if plugin's first run
	if ( get_option( 'ig-sample-plugin', false ) == false ) {
		//yes, install options
		add_option( 'ig-sample-plugin', 1 );
	}

	add_action( 'wp_head', 'enqueue_stuff' );
	add_filter( 'the_content', 'filter_post' );
	add_filter( 'wp_footer', 'add_footer' );
}

//queue up JS & CSS to load on front-end
function enqueue_stuff() {
	//load stylesheet
	wp_enqueue_style( 'ig-sample-css', plugins_url( 'css/sample-styles.css', __FILE__ ) );
	//load script
	wp_enqueue_script( 'ig-sample-css', plugins_url( 'js/sample-script.js', __FILE__ ), array( 'jquery' ) );
}

//filter only posts and inject our code
function filter_post( $content ) {
	//iG::filter_post() is loaded outside this plugin & is available 
	//globally on the current site, so assume its availability
	$content = iG::filter_post( $content )->get();

	return $content;
}

//add markup in footer
function add_footer() {
	//iG::sample_generator() is loaded outside this plugin & is available 
	//globally on the current site, so assume its availability
?>
	<div class="sample-footer">
		<div class="logo"><img src="<?php echo iG::sample_generator()->get_image(); ?>"></div>
		<div class="copy"><?php echo iG::sample_generator()->get_footer(); ?></div>
	</div>
<?php
}


//EOF