Add terms from hashtags

inc/local-taxonomies.php

@@ -3,10 +3,12 @@ namespace WP_SYN;
 
 class LOCAL_TAXONOMIES{
     var $cpt_syn_tag;
+    var $tags_to_terms;
 
     function __construct(){
         add_action('wpsyn_after_register_post_type', array(&$this, 'register_ct'));
         add_action('wpsyn_after_init', array(&$this, 'add_hooks'));
+        add_action('wpsyn_save_post_after', array($this, 'add_terms'), 11, 2);
     }
 
     public function register_ct($post_type){
@@ -19,6 +21,27 @@ class LOCAL_TAXONOMIES{
 
     }
 
+    public function tags(){
+        if(!$this->tags_to_terms){
+            $this->tags_to_terms = array();
+            global $wpdb;
+            $query = "SELECT
+                m.`meta_value` as hashtag,
+                m.`term_id`,
+                t.`taxonomy`
+            FROM
+                {$wpdb->prefix}termmeta m
+                JOIN {$wpdb->prefix}term_taxonomy t ON m.`term_id`=t.`term_id`
+            WHERE
+                `meta_key`='syn_hashtag'";
+            $tag_result = $wpdb->get_results($query);
+            foreach($tag_result as $tag){
+                $this->tags_to_terms[strtolower($tag->hashtag)] = $tag;
+            }
+        }
+        return $this->tags_to_terms;
+    }
+
     public function add_hooks($LOCAL){
         $taxonomies = get_taxonomies(array(
             'object_type'=>array($LOCAL->cpt_syn_post),
@@ -60,4 +83,24 @@ class LOCAL_TAXONOMIES{
         <?php
     }
 
+    public function add_terms($post_id, $post){
+        $tags = $this->tags();
+        if(empty($tags)){
+            return;
+        }
+
+        // Get hashtags in post content
+        preg_match_all('/(^|[ \.\,\;\:\s])#([\w0-9\/\._]*)/u', $post->content, $match_tags);
+
+        if($match_tags && isset($match_tags[2]) && is_array($match_tags[2]) && count($match_tags[2])){
+            foreach($match_tags[2] as $hashtag){
+                $hastag = strtolower($hashtag);
+                if(isset($tags[$hashtag])){
+                    $tag = $tags[$hashtag];
+                    wp_set_post_terms( $post_id, array($tag->term_id), $tag->taxonomy );
+                }
+            }
+        }
+    }
+
 }