implementado el soft-delete

src/main/java/com/imprimelibros/erp/datatables/DataTablesService.java

@@ -1,72 +0,0 @@
-package com.imprimelibros.erp.datatables;
-
-import org.springframework.data.domain.*;
-import org.springframework.data.jpa.domain.Specification;
-import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class DataTablesService {
-
-    public static <T> DataTablesResponse<T> handle(
-            DataTablesRequest dt,
-            JpaSpecificationExecutor<T> repo,
-            long totalCount, // count sin filtros (cacheable)
-            List<String> searchableFields,
-            Class<T> entityClass) {
-        // Spec (filtros)
-        Specification<T> spec = DataTablesSpecification.build(dt, searchableFields);
-
-        // Sort
-        Sort sort = Sort.unsorted();
-        if (!dt.order.isEmpty() && !dt.columns.isEmpty()) {
-            List<Sort.Order> orders = new ArrayList<>();
-            for (var o : dt.order) {
-                var col = dt.columns.get(o.column);
-                String field = col != null ? col.name : null;
-
-                // Acepta solo columnas válidas: no vacías, marcadas como orderable y en la
-                // whitelist "searchable"
-                if (field == null || field.isBlank())
-                    continue;
-                if (!col.orderable)
-                    continue;
-                if (!searchableFields.contains(field))
-                    continue;
-
-                orders.add(new Sort.Order(
-                        "desc".equalsIgnoreCase(o.dir) ? Sort.Direction.DESC : Sort.Direction.ASC,
-                        field));
-            }
-            if (!orders.isEmpty()) {
-                sort = Sort.by(orders);
-            } else {
-                // Fallback: primera columna de dt.columns que sea orderable y esté en la
-                // whitelist
-                for (var c : dt.columns) {
-                    if (c != null && c.orderable && c.name != null && !c.name.isBlank()
-                            && searchableFields.contains(c.name)) {
-                        sort = Sort.by(c.name);
-                        break;
-                    }
-                }
-                // Si no hay ninguna válida, sort se queda UNSORTED
-            }
-        }
-
-        // Page
-        int page = dt.length > 0 ? dt.start / dt.length : 0;
-        Pageable pageable = dt.length > 0 ? PageRequest.of(page, dt.length, sort) : Pageable.unpaged();
-
-        // Query
-        Page<T> result = repo.findAll(spec, pageable);
-        long filtered = result.getTotalElements();
-
-        return new DataTablesResponse<>(
-                dt.draw,
-                totalCount,
-                filtered,
-                result.getContent());
-    }
-}