From 09c9ebb7c77e5dd0405bdf8b5f3453cb3017c253 Mon Sep 17 00:00:00 2001
From: infinitnet <co@infinitnet.io>
Date: Fri, 17 Nov 2023 12:50:44 +0100
Subject: [PATCH] v1.1 release: new features and refactoring

---
 README.md                     |  6 +++
 wordpress-date-shortcodes.php | 88 ++++++++++++++++++-----------------
 2 files changed, 51 insertions(+), 43 deletions(-)

diff --git a/README.md b/README.md
index fa535f0..c052822 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,17 @@ WordPress plugin that adds shortcodes for current, published, and last modified
 ## Purpose
 The main purpose of this plugin is to dynamically add dates to post titles. The shortcodes also work in meta descriptions (Rank Math, Yoast, SEOPress) and post content.
 
+You can use the `adjust` parameter for `[currentday]` to display the date for tomorrow, yesterday, the day after tomorrow, etc. This can be useful to make discounts always expire "tomorrow", for example: "Hurry up! This discount expires on `[currentmonth] [currentday adjust="+1"]`!"
+
 ## Available Shortcodes
+- **[currentday]** - current day
+- **[currentday adjust="+1"]** - tomorrow (both `+` and `-` are supported)
 - **[currentmonth]** - current month
 - **[currentyear]** - current year
+- **[publishedday]** - day the post/page was published
 - **[publishedmonth]** - month the post/page was published
 - **[publishedyear]** - year the post/page was published
+- **[modifiedday]** - day the post/page was last modified
 - **[modifiedmonth]** - month the post/page was last modified
 - **[modifiedyear]** - year the post/page was last modified
 
diff --git a/wordpress-date-shortcodes.php b/wordpress-date-shortcodes.php
index 762bf2b..36e7c0b 100644
--- a/wordpress-date-shortcodes.php
+++ b/wordpress-date-shortcodes.php
@@ -6,60 +6,62 @@
  * Author URI: https://infinitnet.io/
  * Plugin URI: https://github.com/infinitnet/wordpress-date-shortcodes
  * Update URI: https://github.com/infinitnet/wordpress-date-shortcodes
- * Version: 1.0
+ * Version: 1.1
  * License: GPLv3
  * Text Domain: wordpress-date-shortcodes
  */
 
-// Shortcode functions for current year and current month
-if ( ! function_exists( 'infinitnet_current_year_shortcode' ) ) {
-    function infinitnet_current_year_shortcode() {
-        return date_i18n( 'Y' );
-    }
-    add_shortcode( 'currentyear', 'infinitnet_current_year_shortcode' );
-}
+// Main function
+if ( ! function_exists( 'infinitnet_date_shortcode' ) ) {
+    function infinitnet_date_shortcode( $type, $format, $adjustment = 0, $post_date = '' ) {
+        switch ( $type ) {
+            case 'current':
+                $date = date_i18n($format, strtotime("$adjustment days"));
+                break;
+            case 'published':
+                $date = get_the_date($format, get_the_ID());
+                break;
+            case 'modified':
+                $date = get_the_modified_date($format, get_the_ID());
+                break;
+            default:
+                $date = '';
+        }
 
-if ( ! function_exists( 'infinitnet_current_month_shortcode' ) ) {
-    function infinitnet_current_month_shortcode() {
-        return date_i18n( 'F' );
-    }
-    add_shortcode( 'currentmonth', 'infinitnet_current_month_shortcode' );
-}
+        if ($type !== 'current' && $adjustment !== 0) {
+            $date = date_i18n($format, strtotime("$post_date $adjustment days"));
+        }
 
-// Shortcode to display the published year
-if ( ! function_exists( 'infinitnet_published_year_shortcode' ) ) {
-    function infinitnet_published_year_shortcode() {
-        global $post;
-        return get_the_date('Y', $post->ID);
+        return $date;
     }
-    add_shortcode( 'publishedyear', 'infinitnet_published_year_shortcode' );
 }
 
-// Shortcode to display the published month
-if ( ! function_exists( 'infinitnet_published_month_shortcode' ) ) {
-    function infinitnet_published_month_shortcode() {
-        global $post;
-        return get_the_date('F', $post->ID);
-    }
-    add_shortcode( 'publishedmonth', 'infinitnet_published_month_shortcode' );
-}
+// Year shortcodes
+add_shortcode( 'currentyear', function() { return infinitnet_date_shortcode('current', 'Y'); });
+add_shortcode( 'publishedyear', function() { return infinitnet_date_shortcode('published', 'Y'); });
+add_shortcode( 'modifiedyear', function() { return infinitnet_date_shortcode('modified', 'Y'); });
 
-if ( ! function_exists( 'infinitnet_modified_year_shortcode' ) ) {
-    function infinitnet_modified_year_shortcode() {
-        global $post;
-        return get_the_modified_date('Y', $post->ID);
-    }
-    add_shortcode( 'modifiedyear', 'infinitnet_modified_year_shortcode' );
-}
+// Month shortcodes
+add_shortcode( 'currentmonth', function() { return infinitnet_date_shortcode('current', 'F'); });
+add_shortcode( 'publishedmonth', function() { return infinitnet_date_shortcode('published', 'F'); });
+add_shortcode( 'modifiedmonth', function() { return infinitnet_date_shortcode('modified', 'F'); });
 
-// Shortcode to display the last modified month
-if ( ! function_exists( 'infinitnet_modified_month_shortcode' ) ) {
-    function infinitnet_modified_month_shortcode() {
-        global $post;
-        return get_the_modified_date('F', $post->ID);
-    }
-    add_shortcode( 'modifiedmonth', 'infinitnet_modified_month_shortcode' );
-}
+// Day shortcodes
+add_shortcode( 'currentday', function($atts) {
+    $atts = shortcode_atts( array('adjust' => 0), $atts, 'currentday' );
+    $day_format = preg_match('/[jS]/', get_option('date_format'), $day_only_format) ? $day_only_format[0] : 'j';
+    return infinitnet_date_shortcode('current', $day_format, intval($atts['adjust']));
+});
+add_shortcode( 'publishedday', function($atts) {
+    $atts = shortcode_atts( array('adjust' => 0), $atts, 'publishedday' );
+    $day_format = preg_match('/[jS]/', get_option('date_format'), $day_only_format) ? $day_only_format[0] : 'j';
+    return infinitnet_date_shortcode('published', $day_format, intval($atts['adjust']), get_the_date('Y-m-d'));
+});
+add_shortcode( 'modifiedday', function($atts) {
+    $atts = shortcode_atts( array('adjust' => 0), $atts, 'modifiedday' );
+    $day_format = preg_match('/[jS]/', get_option('date_format'), $day_only_format) ? $day_only_format[0] : 'j';
+    return infinitnet_date_shortcode('modified', $day_format, intval($atts['adjust']), get_the_modified_date('Y-m-d'));
+});
 
 // Unified function to process meta content with shortcodes
 function infinitnet_process_meta_content( $content ) {