Add wp-nostr-widget/nostr-widget.php

Initial commit, not yet tested.

wp-nostr-widget/nostr-widget.php

@@ -0,0 +1,111 @@
+<?php
+/*
+Plugin Name: Nostr Widget
+Description: Display Nostr posts from a configurable public key and relay(s).
+Version: 0.2
+Author: martien.io
+*/
+
+class Nostr_Widget extends WP_Widget {
+    function __construct() {
+        parent::__construct(
+            'nostr_widget',
+            __('Nostr Widget', 'nostr_widget_domain'),
+            array('description' => __('Shows Nostr posts from a public key and relay(s).', 'nostr_widget_domain'))
+        );
+    }
+
+    public function widget($args, $instance) {
+        $pubkey = !empty($instance['pubkey']) ? $instance['pubkey'] : '';
+        $relays = $this->get_relays_from_instance($instance);
+
+        echo $args['before_widget'];
+        if (!empty($pubkey) && !empty($relays[0])) {
+            echo $args['before_title'] . 'Nostr Posts' . $args['after_title'];
+            $this->display_nostr_posts($pubkey, $relays);
+        } else {
+            echo 'Please configure at least a public key and one relay.';
+        }
+        echo $args['after_widget'];
+    }
+
+    public function form($instance) {
+        $pubkey = !empty($instance['pubkey']) ? $instance['pubkey'] : '';
+        $relays = $this->get_relays_from_instance($instance);
+
+        ?>
+        <p>
+            <label for="<?php echo $this->get_field_id('pubkey'); ?>"><?php _e('Nostr Public Key:'); ?></label>
+            <input class="widefat" id="<?php echo $this->get_field_id('pubkey'); ?>" name="<?php echo $this->get_field_name('pubkey'); ?>" type="text" value="<?php echo esc_attr($pubkey); ?>" />
+        </p>
+        <p>
+            <strong>Relay URLs (at least one, max five):</strong>
+            <?php for ($i = 0; $i < 5; $i++): ?>
+                <input class="widefat" id="<?php echo $this->get_field_id('relay' . $i); ?>"
+                    name="<?php echo $this->get_field_name('relay' . $i); ?>" type="text"
+                    value="<?php echo esc_attr($relays[$i]); ?>" placeholder="Relay URL #<?php echo $i + 1; ?>" /><br/>
+            <?php endfor; ?>
+            <small>Example: <code>https://nostr.band/api/v0/search</code> (for nostr.band)</small>
+        </p>
+        <?php
+    }
+
+    public function update($new_instance, $old_instance) {
+        $instance = array();
+        $instance['pubkey'] = (!empty($new_instance['pubkey'])) ? strip_tags($new_instance['pubkey']) : '';
+        for ($i = 0; $i < 5; $i++) {
+            $key = 'relay' . $i;
+            $instance[$key] = (!empty($new_instance[$key])) ? esc_url_raw($new_instance[$key]) : '';
+        }
+        return $instance;
+    }
+
+    private function get_relays_from_instance($instance) {
+        $relays = [];
+        for ($i = 0; $i < 5; $i++) {
+            $relays[] = !empty($instance['relay' . $i]) ? $instance['relay' . $i] : '';
+        }
+        return $relays;
+    }
+
+    private function display_nostr_posts($pubkey, $relays) {
+        $posts_found = false;
+        foreach ($relays as $relay) {
+            if (empty($relay)) continue;
+
+            // nostr.band/Mutiny API compatible
+            if (strpos($relay, 'nostr.band') !== false || strpos($relay, 'mutinywallet') !== false) {
+                $url = trailingslashit($relay) . '?author=' . $pubkey . '&limit=5&type=text_note';
+            } else {
+                // Fallback for custom APIs, may need more customization!
+                $url = $relay . '?author=' . $pubkey . '&limit=5';
+            }
+
+            $response = wp_remote_get($url, ['timeout' => 8]);
+            if (is_wp_error($response)) continue;
+
+            $body = wp_remote_retrieve_body($response);
+            $data = json_decode($body, true);
+
+            if (!empty($data['events'])) {
+                $posts_found = true;
+                echo '<ul class="nostr-posts">';
+                foreach ($data['events'] as $event) {
+                    $content = esc_html($event['content']);
+                    $date = date('Y-m-d H:i', $event['created_at']);
+                    echo "<li><div class='nostr-date'>$date</div><div class='nostr-content'>$content</div></li>";
+                }
+                echo '</ul>';
+                break; // Stop after first relay with results
+            }
+        }
+        if (!$posts_found) {
+            echo 'No posts found on any configured relay.';
+        }
+    }
+}
+
+function register_nostr_widget() {
+    register_widget('Nostr_Widget');
+}
+add_action('widgets_init', 'register_nostr_widget');