added suport for search in plugin rather than in theme

includes/custom-field-ajuts-filter.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * Makes a filter for the custom post type ajut and its custom fields
+ */
+
+// define the filter fields
+// array of filters (field key => field name)
+$GLOBALS['my_query_filters'] = array(
+  'fundtarget' => 'os_fund_target',
+  'fundsource' => 'os_fund_source',
+  'fundfield' => 'os_fund_field'
+);
+$GLOBALS['my_query_filters_dates'] = array(
+  'fundapplybegin' => 'os_fund_apply_begin',
+  'fundapplyend' => 'os_fund_apply_end'
+  //'fundcall' => 'os_fund_call',
+);
+
+// action
+add_action('pre_get_posts', 'my_pre_get_posts',10,1);
+
+function my_pre_get_posts( $query ) {
+    
+    // bail early if is in admin
+    if( is_admin() ) { return; }
+    
+    // bail early if not main query or plugin $the_query_ajut
+    // - allows custom code / plugins to continue working
+    if( !$query->is_main_query() ) return;
+
+
+
+    // loop over filters
+    foreach( $GLOBALS['my_query_filters'] as $key => $fieldname)
+    {
+      // continue if not found in url
+      if( empty($_GET[ $fieldname ]) ) { continue; }
+
+      // get original meta query
+      $meta_query = [];
+      $meta_query[] = $query->get('meta_query');
+      $meta_query[] = array('relation'  => 'OR');
+
+      // get the values for this filter
+      // eg: http://domain.tdl/ajut/?os_fund_target=autonoma,entitat-publica
+      $filtervalues= explode(',', $_GET[ $fieldname ]);
+
+      // loop retreived values from checkboxes and filter them with REGEXP
+      // http://domain.tdl/ajut/?os_fund_target=autonoma&os_fund_field=circi
+      // http://domain.tdl/ajut/?os_fund_target=autonoma,entitat-publica&os_fund_field=dansa
+      foreach( $filtervalues as $filteredvalue )
+      {
+        // they are array based fields
+        // https://barn2.com/blog/querying-posts-by-custom-field-acf/#array-based-fields
+        $strippedvalue = sprintf( '^%1$s$|s:%2$u:"%1$s";', $filteredvalue, strlen( $filteredvalue ) );
+
+        // add our meta query to the original meta queries
+        $meta_query[] = array(
+            array(
+                'key'     =>  $fieldname,
+                'value'   =>  $strippedvalue,
+                'compare' =>  'REGEXP',
+            ),
+        );
+      }
+    // update the meta query arguments
+    $query->set('meta_query', $meta_query);
+    }
+
+    //always return
+    return;
+}

includes/custom-post-type-ajuts.php

@@ -40,7 +40,7 @@
  		'not_ajut_in_trash'  => __( 'No hem trovat cap ajut a la brosa', 'text_domain' )
  	);
  	$rewrite = array(
-		'slug'                => 'ajut'
+		'slug'                => 'ajuts'
  	);
 	// https://wordpress.stackexchange.com/questions/108338/capabilities-and-custom-post-types#108375
 	// https://developer.wordpress.org/reference/functions/register_post_type/#capability_type
@@ -59,11 +59,12 @@
  		'label'               => __( 'ofisuport-ajut', 'text_domain' ),
  		'description'         => __( 'Ajuts', 'text_domain' ),
  		'labels'              => $labels,
-    'supports'            => array( 'title', 'editor', 'thumbnail', 'trackbacks', 'revisions', 'custom-fields', 'page-attributes' ),
+    //'supports'            => array( 'title', 'editor', 'thumbnail', 'trackbacks', 'revisions', 'custom-fields', 'page-attributes' ),
-    'taxonomies'          => array(
+    'supports'            => array( 'title', 'editor', 'trackbacks', 'revisions', 'custom-fields', 'page-attributes' ),
-      'ofisuport-ajut-category',
+   // 'taxonomies'          => array(
-      'ofisuport-ajut-tag'
+   //   'ofisuport-ajut-category',
-    ),
+   //   'ofisuport-ajut-tag'
+   // ),
  		'hierarchical'        => true,
  		'public'              => true,
  		'show_ui'             => true,
@@ -80,7 +81,7 @@
  		'capability_type'     => 'post',
     'rewrite'             => $rewrite,
 		//'capabilities' 				=> $capabilities,
-		'map_meta_cap' 				=> true //neded to apply the new capabilities.
+		//'map_meta_cap' 				=> true //neded to apply the new capabilities.
  	);
  	register_post_type( 'ofisuport-ajut', $args );
  }

ofisuport-wp-plugin.php

@@ -59,11 +59,13 @@ include( OFISUPORT_WPPLUGIN_PATH . 'includes/plugin-init-textdomain.php');
 
 include( OFISUPORT_WPPLUGIN_PATH . 'includes/enable-svg.php');
 
-//if ( is_admin() ) {
+if ( is_admin() ) {
-  include( OFISUPORT_WPPLUGIN_PATH . 'includes/stylesheet-admin.php');
+include( OFISUPORT_WPPLUGIN_PATH . 'includes/stylesheet-admin.php');
 //} else {
-  include( OFISUPORT_WPPLUGIN_PATH . 'includes/stylesheet-public.php');
+//include( OFISUPORT_WPPLUGIN_PATH . 'includes/stylesheet-public.php');
-//}
+}
 
 include( OFISUPORT_WPPLUGIN_PATH . 'includes/custom-post-type-ajuts.php');
 
+include( OFISUPORT_WPPLUGIN_PATH . 'includes/custom-field-ajuts-filter.php');
+