<?php
/*
Plugin Name: Append extensions on Pages
Plugin URI: http://www.skmukhiya.com.np
Description: Appends different types of extensions like .html, .php, .asp, .jsp, .asp, .aspx on the wordpress pages when used with permalink
Version: 1.1.1
Author: dr.code.skm
Author URI: https://www.odesk.com/users/~0182e0779315e50896
Tags: append .html on pages, .html on permalink, add .html on pages, add .php on pages, add .aspx on pages, add .cfm on page, add .jsp on pages
*/



// initiating hooks and plugins
	register_activation_hook(__FILE__, 'aeop_active');

//initiating plugin deactivation hooks
	register_deactivation_hook(__FILE__, 'aeop_deactive');


//Adding settings link
	function aeop_settings_link( $links ) {
		$links[] = '<a href="'.admin_url( 'admin.php?page=aeop_settings' ).'">Settings</a>';
		return $links;
	}
	add_filter( "plugin_action_links_".plugin_basename( __FILE__ ), 'aeop_settings_link' );


add_action('admin_menu', 'aeop_settings_menu');
//adding a dummy page
function aeop_settings_menu() {
    add_submenu_page(
          'options-general.php'
        , 'Append Extension settings'
        , 'Append Extension settings'
        , 'manage_options'
        , 'aeop_settings'
        , 'aeop_display_settings'
    );
    register_setting( 'aeop_settings_group', 'aeop_fburl' );
    register_setting( 'aeop_settings_group', 'aeop_allow_directly' );
}





function aeop_display_settings() {
?>
<div class="clear"></div>
<div id="welcome-panel" class="welcome-panel">
	<div class="welcome-panel-content">
	<h3>Appending Extension Settings Page!</h3>
	<p class="about-description">Add suitable Extensions to your WordPress page</p>
	<div class="welcome-panel-column-container">
		<div class="welcome-panel-column" style="width:50%;">
			<h4>Get Started</h4>
			<form method="post" action="options.php">
		    <?php settings_fields( 'aeop_settings_group' ); ?>
		    <?php do_settings_sections( 'aeop_settings_group' ); ?>
		    <table class="form-table">
		        <tr valign="top">
		        <th scope="row">Enter the extension you want to append?</th>
		        <td><input type="text" name="aeop_fburl" value="<?php echo get_option('aeop_fburl'); ?>" /></td>
		        </tr>
				<tr><i>You can enter valid extensions such as .html, .htm, .jsp, .php, .asp, .cfm and .aspx only</i></tr>
		        <tr valign="top">
		        <th scope="row">Still allow people to access urls without extension?</th>
		        <td> No: <input type="radio" name="aeop_allow_directly" value="0" <?php  checked(get_option('aeop_allow_directly'),0);?>  /> &nbsp; Yes <input type="radio" name="aeop_allow_directly" value="1" <?php checked(get_option('aeop_allow_directly'),1);?>  /></td>
		        </tr>
				<tr><i>you can allow or forbid</i></tr>
		    </table>

		    <?php
		    $other_attributes = array( 'id' => 'aeop-submit-button' );
			submit_button( 'Save Settings', 'primary', 'wpdocs-save-settings', true, $other_attributes );
		    ?>
		    <p>Save your permalink setting everytime you update extension.</p>
			</form>
		</div>

	<div class="welcome-panel-column welcome-panel-last">
		<h4>More Actions</h4>
		<ul>
			<li><div class="welcome-icon welcome-widgets-menus">Found this plugin Useful <a href="http://www.skmukhiya.com.np/donation-page/">Buy me a beer</a></div></li>
			<li><a href="mailto:[email protected]" class="welcome-icon welcome-comments">Contact Author For more support</a></li>
			<li><a href="http://www.skmukhiya.com.np/append-extensions-to-pages/" class="welcome-icon welcome-learn-more">Learn more about getting started</a></li>
		</ul>
	</div>
	</div>
	</div>
</div>
<?php }




	function validateExtension($extension){
		$extension = get_option('aeop_fburl');
		return ( in_array( $extension, array('.cfm','.html','.htm','.asp','.aspx','.jsp','.php')) ?  $extension :  "");
	}



/**
 * aeop function to initiate the global settings permalink initiations
 * @param null
 * @return string
**/
	function aeop_html_page_permalink($flush=false) {
		if (is_admin()) return;

		global $wp_rewrite;
		$ext=validateExtension(get_option('aeop_fburl')) ;

		//check, if people are allowed to enter some pages without the ending:
		$allowed_without_extension= get_option('aeop_allow_directly');
		if(stripos($_SERVER['REQUEST_URI'], $ext)=== false && $allowed_without_extension) {
			//do nothing, because they are allowed to view what they want
		}
		elseif ( !strpos($wp_rewrite->get_page_permastruct(),$ext )){
			$wp_rewrite->page_structure .= $ext;
		}
		if($flush) { $wp_rewrite->flush_rules(); }
	}
	add_action('init', 'aeop_html_page_permalink', -1);


/**
 * aeop function to check page slash
 * @param string, string
 * @return string
**/
	function aeop_no_page_slash($string, $type){
	   global $wp_rewrite;
		if ($wp_rewrite->using_permalinks() && $wp_rewrite->use_trailing_slashes==true && $type == 'page'){
			return untrailingslashit($string);
	  }else{
	   return $string;
	  }
	}

	add_filter('user_trailingslashit', 'aeop_no_page_slash',66,2);



/**
 * aeop function to activate the plugin
 * @param null
 * @return void
**/
	function aeop_active() {
		add_option('aeop_fburl', '.html');
		add_option('aeop_allow_directly', 1);
		aeop_html_page_permalink(true);
	}

/**
 * aeop function to deactivate the plugin
 * @param null
 * @return void
**/
	function aeop_deactive() {
		global $wp_rewrite;
		$wp_rewrite->page_structure = str_replace(validateExtension(get_option('aeop_fburl')),"",$wp_rewrite->page_structure);
		$wp_rewrite->flush_rules();
	}
?>