filter to replace collection link. pre_get_posts for term archives

src/classes/entities/class-tainacan-taxonomy.php

@@ -36,7 +36,14 @@ class Taxonomy extends Entity {
      * @var string
      */
     protected $repository = 'Taxonomies';
-
+	
+	/**
+	 * Prefix used to create the db_identifier
+	 *
+	 * @var string
+	 */
+	static $db_identifier_prefix = 'tnc_tax_';
+	
 	public function  __toString(){
 		return 'Hello, my name is '. $this->get_name();
 	}
@@ -138,7 +145,7 @@ class Taxonomy extends Entity {
 	 * @return bool|string
 	 */
 	function get_db_identifier() {
-        return $this->get_id() ? 'tnc_tax_' . $this->get_id() : false;
+        return $this->get_id() ? self::$db_identifier_prefix . $this->get_id() : false;
     }
 
     // Setters

src/classes/repositories/class-tainacan-repository.php

@@ -341,12 +341,12 @@ abstract class Repository {
 	 *
 	 * @return array[]
 	 */
-	public static function get_collections_db_identifier() {
+	public static function get_collections_db_identifiers() {
 		$Tainacan_Collections = \Tainacan\Repositories\Collections::get_instance();
 		$collections = $Tainacan_Collections->fetch( [], 'OBJECT' );
 		$cpts        = [];
 		foreach ( $collections as $col ) {
-			$cpts[ $col->get_db_identifier() ] = $col;
+			$cpts[] = $col->get_db_identifier();
 		}
 
 		return $cpts;
@@ -387,8 +387,8 @@ abstract class Repository {
 
 		// Is it a collection Item?
 		if ( $prefix == Entities\Collection::$db_identifier_prefix ) {
-			$cpts = self::get_collections_db_identifier();
-			if ( array_key_exists( $post_type, $cpts ) ) {
+			$cpts = self::get_collections_db_identifiers();
+			if ( in_array( $post_type, $cpts ) ) {
 				return $entity = new \Tainacan\Entities\Item( $post );
 			} else {
 				throw new \Exception( 'Collection object not found for this post' );

src/theme-helper/class-tainacan-theme-helper.php

@@ -21,6 +21,14 @@ class Theme_Helper {
 		add_filter( 'the_content', [&$this, 'the_content_filter'] );
 		
 		
+		/**
+		 * Replace collection single template with the respective post type archive
+		 * TODO: if collections is not set to use a cover page
+		 */
+		add_filter('post_type_link', array(&$this, 'permalink_filter'), 10, 3);
+		
+		
+		add_action('pre_get_posts', array(&$this, 'tax_archive_pre_get_posts'));
 
 	}
 	
@@ -30,6 +38,15 @@ class Theme_Helper {
 		return $prefix == Entities\Collection::$db_identifier_prefix;
 	}
 	
+	public function is_taxonomy_a_tainacan_tax($tax_slug) {
+		$prefix = substr( $tax_slug, 0, strlen( Entities\Taxonomy::$db_identifier_prefix ) );
+		return $prefix == Entities\Taxonomy::$db_identifier_prefix;
+	}
+	
+	public function is_term_a_tainacan_term( \WP_Term $term ) {
+		return $this->is_taxonomy_a_tainacan_tax($term->taxonomy);
+	}
+	
 	public function the_content_filter($content) {
 		global $post;
 		
@@ -55,6 +72,49 @@ class Theme_Helper {
 		
 	}
 	
+	/**
+     * Filters the permalink for posts to:
+     *
+     * * Replace Collectino single permalink with the link to the post type archive for items of that collection
+     * 
+     * @return string new permalink
+     */
+    function permalink_filter($permalink, $post, $leavename) {
+        
+        $collection_post_type = \Tainacan\Entities\Collection::get_post_type();
+        
+        if (!is_admin() && $post->post_type == $collection_post_type) {
+            
+            $collection = new \Tainacan\Entities\Collection($post);
+            $items_post_type = $collection->get_db_identifier();
+            
+            $post_type_object = get_post_type_object($items_post_type);
+            
+            if (isset($post_type_object->rewrite) && is_array($post_type_object->rewrite) && isset($post_type_object->rewrite['slug']))
+                return site_url($post_type_object->rewrite['slug']);
+                
+        }
+        
+        return $permalink;
+        
+    }
+	
+	function tax_archive_pre_get_posts($wp_query) {
+		
+		if (!is_tax() || !$wp_query->is_main_query())
+			return $wp_query;
+		
+		$term = get_queried_object();
+		
+		if ($this->is_term_a_tainacan_term($term)) {
+			// TODO: Why post_type = any does not work?
+			$wp_query->set( 'post_type', \Tainacan\Repositories\Repository::get_collections_db_identifiers() );
+		}
+		
+		return $wp_query;
+		
+	}
+	
 	
 
 }