<?php
/*
Plugin Name: Extra shortcodes
Plugin URI: http://web-profile.com.ua/wordpress/plugins/extra-shortcodes/
Description: [bloginfo show="name"], [site_title], [site_desc], [date format="l jS \\of F Y h:i:s A" timestamp="+2 years +3 months -20 days -10 hours +30 minutes"], [time], [year plus="2"], [month minus="3"], [month_name], [day], [weekday]
Version: 1.3
Author: webvitaly
Author Email: webvitaly(at)gmail(dot)com
Author URI: http://web-profile.com.ua/wordpress/
*/

if ( !function_exists('bloginfo_shortcode') ) {
	function bloginfo_shortcode( $atts ) {
		extract(shortcode_atts(array(
			'show' => 'name'
		), $atts));
		return get_bloginfo($show);
	}
	add_shortcode('bloginfo', 'bloginfo_shortcode');
}

if ( !function_exists('site_title_shortcode') ) {
	function site_title_shortcode( $atts ) {
		return get_bloginfo('name');
	}
	add_shortcode( 'site_title', 'site_title_shortcode' );
	add_shortcode( 'sitetitle', 'site_title_shortcode' ); // just in case
	//add_shortcode( 'site-title', 'site_title_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('site_desc_shortcode') ) {
	function site_desc_shortcode( $atts ) {
		return get_bloginfo('description');
	}
	add_shortcode( 'site_desc', 'site_desc_shortcode' );
	add_shortcode( 'sitedesc', 'site_desc_shortcode' ); // just in case
	add_shortcode( 'site_description', 'site_desc_shortcode' ); // just in case
	add_shortcode( 'sitedescription', 'site_desc_shortcode' ); // just in case
	//add_shortcode( 'site-desc', 'site_desc_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('site_url_shortcode') ) {
	function site_url_shortcode( $atts ) {
		return get_bloginfo('url');
	}
	add_shortcode( 'site_url', 'site_url_shortcode' );
	add_shortcode( 'siteurl', 'site_url_shortcode' ); // just in case
	//add_shortcode( 'site-url', 'site_url_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('wp_version_shortcode') ) {
	function wp_version_shortcode( $atts ) {
		return get_bloginfo('version');
	}
	add_shortcode( 'wp_version', 'wp_version_shortcode' );
	add_shortcode( 'wpversion', 'wp_version_shortcode' ); // just in case
	//add_shortcode( 'wp-version', 'wp_version_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('date_shortcode') ) {
	function date_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'format' => 'l jS \of F Y',
			'timestamp' => 'now'
		), $atts ) );
		return date( $format, strtotime( $timestamp ) );
	}
	add_shortcode( 'date', 'date_shortcode' );
}

if ( !function_exists('time_shortcode') ) {
	function time_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'format' => 'h:i:s A',
			'timestamp' => 'now'
		), $atts ) );
		return date( $format, strtotime( $timestamp ) );
	}
	add_shortcode( 'time', 'time_shortcode' );
}

if ( !function_exists('year_shortcode') ) {
	function year_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$year = date( 'Y', strtotime( '+'.intval($plus).' years' ) );
		}elseif( !empty( $minus ) ){
			$year = date( 'Y', strtotime( '-'.intval($minus).' years' ) );
		}else{
			$year = date( 'Y', strtotime( $timestamp ) );
		}
		return $year;
	}
	add_shortcode( 'year', 'year_shortcode' );
}

if ( !function_exists('month_shortcode') ) {
	function month_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$month = date( 'm', strtotime( '+'.intval($plus).' months' ) );
		}elseif( !empty( $minus ) ){
			$month = date( 'm', strtotime( '-'.intval($minus).' months' ) );
		}else{
			$month = date( 'm', strtotime( $timestamp ) );
		}
		return $month;
	}
	add_shortcode( 'month', 'month_shortcode' );
}

if ( !function_exists('month_name_shortcode') ) {
	function month_name_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$month_name = date( 'F', strtotime( '+'.intval($plus).' months' ) );
		}elseif( !empty( $minus ) ){
			$month_name = date( 'F', strtotime( '-'.intval($minus).' months' ) );
		}else{
			$month_name = date( 'F', strtotime( $timestamp ) );
		}
		return $month_name;
	}
	add_shortcode( 'month_name', 'month_name_shortcode' );
	add_shortcode( 'monthname', 'month_name_shortcode' ); // just in case
	//add_shortcode( 'month-name', 'month_name_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('day_shortcode') ) {
	function day_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$day = date( 'd', strtotime( '+'.intval($plus).' days' ) );
		}elseif( !empty( $minus ) ){
			$day = date( 'd', strtotime( '-'.intval($minus).' days' ) );
		}else{
			$day = date( 'd', strtotime( $timestamp ) );
		}
		return $day;
	}
	add_shortcode( 'day', 'day_shortcode' );
}

if ( !function_exists('weekday_shortcode') ) {
	function weekday_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$weekday = date( 'l', strtotime( '+'.intval($plus).' days' ) );
		}elseif( !empty( $minus ) ){
			$weekday = date( 'l', strtotime( '-'.intval($minus).' days' ) );
		}else{
			$weekday = date( 'l', strtotime( $timestamp ) );
		}
		return $weekday;
	}
	add_shortcode( 'weekday', 'weekday_shortcode' );
	add_shortcode( 'week_day', 'weekday_shortcode' ); // just in case
	//add_shortcode( 'week-day', 'weekday_shortcode' ); // not good (Shortcode names should be all lowercase and use all letters, but numbers and underscores (not dashes!) should work fine too.)
}

if ( !function_exists('hours_shortcode') ) {
	function hours_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$hours = date( 'H', strtotime( '+'.intval($plus).' hours' ) );
		}elseif( !empty( $minus ) ){
			$hours = date( 'H', strtotime( '-'.intval($minus).' hours' ) );
		}else{
			$hours = date( 'H', strtotime( $timestamp ) );
		}
		return $hours;
	}
	add_shortcode( 'hours', 'hours_shortcode' );
	add_shortcode( 'hour', 'hours_shortcode' ); // just in case
}

if ( !function_exists('minutes_shortcode') ) {
	function minutes_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$minutes = date( 'i', strtotime( '+'.intval($plus).' minutes' ) );
		}elseif( !empty( $minus ) ){
			$minutes = date( 'i', strtotime( '-'.intval($minus).' minutes' ) );
		}else{
			$minutes = date( 'i', strtotime( $timestamp ) );
		}
		return $minutes;
	}
	add_shortcode( 'minutes', 'minutes_shortcode' );
	add_shortcode( 'minute', 'minutes_shortcode' ); // just in case
}

if ( !function_exists('seconds_shortcode') ) {
	function seconds_shortcode( $atts ) {
		extract( shortcode_atts( array(
			'plus' => 0,
			'minus' => 0,
			'timestamp' => 'now'
		), $atts ) );
		if( !empty( $plus ) ){
			$seconds = date( 's', strtotime( '+'.intval($plus).' seconds' ) );
		}elseif( !empty( $minus ) ){
			$seconds = date( 's', strtotime( '-'.intval($minus).' seconds' ) );
		}else{
			$seconds = date( 's', strtotime( $timestamp ) );
		}
		return $seconds;
	}
	add_shortcode( 'seconds', 'seconds_shortcode' );
	add_shortcode( 'second', 'seconds_shortcode' ); // just in case
}