From 5adf97494df558a3ae0d38f73bbbd6022bf9a518 Mon Sep 17 00:00:00 2001
From: Kumi <git@kumi.email>
Date: Thu, 20 Jun 2024 20:53:04 +0200
Subject: [PATCH] feat: add Letters to the Editor post type

Introduced a new custom post type "Letters to the Editor" with corresponding archive and single templates. Enhanced post type functionality includes support for featured images, authors, excerpts, and comments. Added pagination and a meta box for article authors to improve user interaction and content management.
---
 archive-letter.php | 44 ++++++++++++++++++++++++++++++++++
 functions.php      | 60 ++++++++++++++++++++++++++++++++++++++++++++++
 single-letter.php  | 27 +++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 archive-letter.php
 create mode 100644 single-letter.php

diff --git a/archive-letter.php b/archive-letter.php
new file mode 100644
index 0000000..e4a9b8a
--- /dev/null
+++ b/archive-letter.php
@@ -0,0 +1,44 @@
+<?php get_header(); ?>
+
+<!-- Archive Content -->
+<section class="container my-5">
+    <h1 class="display-4 text-center">Letters to the Editor</h1>
+    <div class="row">
+        <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
+                <div class="col-md-4">
+                    <div class="card mb-4 shadow-sm">
+                        <?php if (has_post_thumbnail()) : ?>
+                            <img src="<?php the_post_thumbnail_url(); ?>" class="card-img-top" alt="<?php the_title(); ?>">
+                        <?php endif; ?>
+                        <div class="card-body">
+                            <h5 class="card-title"><?php the_title(); ?></h5>
+                            <p class="card-text"> <?php
+                                                    $authors = get_post_meta(get_the_ID(), 'article_authors', true);
+                                                    if (!empty($authors)) {
+                                                        echo implode(', ', array_map('esc_html', $authors));
+                                                    } else {
+                                                        the_author();
+                                                    }
+                                                    ?> | <?php the_date(); ?></p>
+                            <p class="card-text"><?php the_excerpt(); ?></p>
+                            <a href="<?php the_permalink(); ?>" class="btn btn-outline-primary">Read More</a>
+                        </div>
+                    </div>
+                </div>
+            <?php endwhile;
+        else : ?>
+            <p><?php _e('Sorry, no letters found.', 'duck-behavior-journal'); ?></p>
+        <?php endif; ?>
+    </div>
+    <div class="row">
+        <div class="col-md-12">
+            <?php
+            echo paginate_links(array(
+                'total' => $wp_query->max_num_pages,
+            ));
+            ?>
+        </div>
+    </div>
+</section>
+
+<?php get_footer(); ?>
\ No newline at end of file
diff --git a/functions.php b/functions.php
index e10c7a4..0939a85 100644
--- a/functions.php
+++ b/functions.php
@@ -409,3 +409,63 @@ function redirect_doi_to_article($query)
 }
 
 add_action('parse_query', 'redirect_doi_to_article');
+
+function create_letter_post_type() {
+    $labels = array(
+        'name'                  => _x('Letters to the Editor', 'Post type general name', 'duck-behavior-journal'),
+        'singular_name'         => _x('Letter to the Editor', 'Post type singular name', 'duck-behavior-journal'),
+        'menu_name'             => _x('Letters to the Editor', 'Admin Menu text', 'duck-behavior-journal'),
+        'name_admin_bar'        => _x('Letter to the Editor', 'Add New on Toolbar', 'duck-behavior-journal'),
+        'add_new'               => __('Add New', 'duck-behavior-journal'),
+        'add_new_item'          => __('Add New Letter', 'duck-behavior-journal'),
+        'new_item'              => __('New Letter', 'duck-behavior-journal'),
+        'edit_item'             => __('Edit Letter', 'duck-behavior-journal'),
+        'view_item'             => __('View Letter', 'duck-behavior-journal'),
+        'all_items'             => __('All Letters', 'duck-behavior-journal'),
+        'search_items'          => __('Search Letters', 'duck-behavior-journal'),
+        'parent_item_colon'     => __('Parent Letters:', 'duck-behavior-journal'),
+        'not_found'             => __('No letters found.', 'duck-behavior-journal'),
+        'not_found_in_trash'    => __('No letters found in Trash.', 'duck-behavior-journal'),
+        'featured_image'        => _x('Featured Image', 'Overrides the “Featured Image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
+        'set_featured_image'    => _x('Set featured image', 'Overrides the “Set featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
+        'remove_featured_image' => _x('Remove featured image', 'Overrides the “Remove featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
+        'use_featured_image'    => _x('Use as featured image', 'Overrides the “Use as featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
+        'archives'              => _x('Letter archives', 'The post type archive label used in nav menus. Default “Post Archives”. Added in 4.4', 'duck-behavior-journal'),
+        'insert_into_item'      => _x('Insert into letter', 'Overrides the “Insert into post”/”Insert into page” phrase (used when inserting media into a post). Added in 4.4', 'duck-behavior-journal'),
+        'uploaded_to_this_item' => _x('Uploaded to this letter', 'Overrides the “Uploaded to this post”/”Uploaded to this page” phrase (used when viewing media attached to a post). Added in 4.4', 'duck-behavior-journal'),
+        'filter_items_list'     => _x('Filter letters list', 'Screen reader text for the filter links heading on the post type listing screen. Default “Filter posts list”/”Filter pages list”. Added in 4.4', 'duck-behavior-journal'),
+        'items_list_navigation' => _x('Letters list navigation', 'Screen reader text for the pagination heading on the post type listing screen. Default “Posts list navigation”/”Pages list navigation”. Added in 4.4', 'duck-behavior-journal'),
+        'items_list'            => _x('Letters list', 'Screen reader text for the items list heading on the post type listing screen. Default “Posts list”/”Pages list”. Added in 4.4', 'duck-behavior-journal'),
+    );
+
+    $args = array(
+        'labels'             => $labels,
+        'public'             => true,
+        'publicly_queryable' => true,
+        'show_ui'            => true,
+        'show_in_menu'       => true,
+        'query_var'          => true,
+        'rewrite'            => array('slug' => 'letter'),
+        'capability_type'    => 'post',
+        'has_archive'        => true,
+        'hierarchical'       => false,
+        'menu_position'      => null,
+        'supports'           => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments'),
+    );
+
+    register_post_type('letter', $args);
+}
+add_action('init', 'create_letter_post_type');
+
+function add_article_meta_boxes() {
+    add_meta_box(
+        'article_authors',
+        __('Authors', 'duck-behavior-journal'),
+        'render_article_authors_meta_box',
+        array('letter'),
+        'side',
+        'default'
+    );
+}
+
+add_action('add_meta_boxes', 'add_letter_meta_boxes');
diff --git a/single-letter.php b/single-letter.php
new file mode 100644
index 0000000..13c22c6
--- /dev/null
+++ b/single-letter.php
@@ -0,0 +1,27 @@
+<?php get_header(); ?>
+
+<!-- Letter Content -->
+<section class="container my-5">
+    <div class="row">
+        <div class="col-lg-8 mx-auto">
+            <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
+                    <h1 class="display-4"><?php the_title(); ?></h1>
+                    <?php
+                    $authors = get_post_meta(get_the_ID(), 'article_authors', true);
+                    if (!empty($authors)) {
+                        echo implode(', ', array_map('esc_html', $authors));
+                    } else {
+                        the_author();
+                    }
+                    ?> | <?php the_date(); ?>
+                    <?php if (has_post_thumbnail()) : ?>
+                        <img src="<?php the_post_thumbnail_url(); ?>" class="img-fluid mb-4" alt="<?php the_title(); ?>">
+                    <?php endif; ?>
+                    <?php the_content(); ?>
+            <?php endwhile;
+            endif; ?>
+        </div>
+    </div>
+</section>
+
+<?php get_footer(); ?>
\ No newline at end of file