Merge branch 'isemptyfilter' into 'master'

Add an 'Is Empty' filter

See merge request !23

Civi/DataProcessor/DataFlow/SqlDataFlow/SimpleWhereClause.php

@@ -27,6 +27,11 @@ class SimpleWhereClause implements WhereClauseInterface {
         case '!=':
           $operator = 'NOT IN';
           break;
+
+        case 'IS NULL':
+          $operator = 'IS NULL';
+          break;
+
       }
     }
 
@@ -34,6 +39,12 @@ class SimpleWhereClause implements WhereClauseInterface {
     $this->table_alias = $table_alias;
     $this->field = $field;
     $this->operator = $operator;
+
+    if ($operator == 'IS NULL') {
+      $this->value = NULL;
+      return;
+    }
+
     if (is_array($value)) {
       $esacpedValues = array();
       foreach($value as $val) {
@@ -61,6 +72,7 @@ class SimpleWhereClause implements WhereClauseInterface {
         case 'Memo':
           $this->value = "'" . \CRM_Utils_Type::escape($value, $valueType) . "'";
           break;
+
         default:
           $this->value = \CRM_Utils_Type::escape($value, $valueType);
           break;

Civi/DataProcessor/FilterHandler/AbstractFilterHandler.php

@@ -319,6 +319,18 @@ abstract class AbstractFilterHandler {
             $isFilterSet = TRUE;
           }
           break;
+
+        case 'null':
+          if (empty($submittedValues[$filterName . '_value'])) {
+            $filterParams = [
+              'op' => 'IS NULL',
+              'value' => '',
+            ];
+            $this->setFilter($filterParams);
+            $isFilterSet = TRUE;
+          }
+          break;
+
       }
     }
     if ($this->isRequired() && !$isFilterSet) {
@@ -483,6 +495,7 @@ abstract class AbstractFilterHandler {
       return array(
         'IN' => E::ts('Is one of'),
         'NOT IN' => E::ts('Is not one of'),
+        'null' => E::ts('Is empty'),
       );
     }
     $types = \CRM_Utils_Type::getValidTypes();
@@ -503,6 +516,7 @@ abstract class AbstractFilterHandler {
           '<' => E::ts('Is less than'),
           '>' => E::ts('Is greater than'),
           '!=' => E::ts('Is not equal to'),
+          'null' => E::ts('Is empty'),
         );
         break;
     }
@@ -513,6 +527,7 @@ abstract class AbstractFilterHandler {
       'sw' => E::ts('Starts with'),
       'ew' => E::ts('Ends with'),
       'nhas' => E::ts('Does not contain'),
+      'null' => E::ts('Is empty'),
     );
   }
 

Civi/DataProcessor/FilterHandler/ContactFilter.php

@@ -162,6 +162,7 @@ class ContactFilter extends AbstractFieldFilterHandler {
     return array(
       'IN' => E::ts('Is one of'),
       'NOT IN' => E::ts('Is not one of'),
+      'null' => E::ts('Is empty'),
     );
   }