src/shared/lib/helpers/createFilter/createFilter.svelte.ts

@@ -37,41 +37,43 @@ export function createFilter<TValue extends string>(initialState: FilterModel<TV
         })),
     );
 
+    // Helper to find a property by ID
+    const findProp = (id: string) => properties.find(p => p.id === id);
+
     return {
         get properties() {
             return properties;
         },
-
         get selectedProperties() {
             return properties.filter(p => p.selected);
         },
-
         get selectedCount() {
-            return this.selectedProperties.length;
+            return properties.filter(p => p.selected)?.length;
         },
 
-        // 3. Methods mutate the reactive state directly
         toggleProperty(id: string) {
-            const prop = properties.find(p => p.id === id);
-            if (prop) prop.selected = !prop.selected;
+            const property = findProp(id);
+            if (property) {
+                property.selected = !property.selected;
+            }
         },
-
         selectProperty(id: string) {
-            const prop = properties.find(p => p.id === id);
-            if (prop) prop.selected = true;
+            const property = findProp(id);
+            if (property) {
+                property.selected = true;
+            }
         },
-
         deselectProperty(id: string) {
-            const prop = properties.find(p => p.id === id);
-            if (prop) prop.selected = false;
+            const property = findProp(id);
+            if (property) {
+                property.selected = false;
+            }
         },
-
         selectAll() {
-            properties.forEach(p => p.selected = true);
+            properties.forEach(property => property.selected = true);
         },
-
         deselectAll() {
-            properties.forEach(p => p.selected = false);
+            properties.forEach(property => property.selected = false);
         },
     };
 }