added logic for sub-category filter

Signed-off-by: pransh62390 <[email protected]>

models/meshmodel/registry/v1beta1/sub_category_filter.go

@@ -0,0 +1,90 @@
+package v1beta1
+
+import (
+	"github.com/layer5io/meshkit/database"
+	"github.com/layer5io/meshkit/models/meshmodel/entity"
+	"github.com/layer5io/meshkit/models/meshmodel/registry"
+	"github.com/meshery/schemas/models/v1beta1/subCategory"
+	"gorm.io/gorm/clause"
+)
+
+type SubCategoryFilter struct {
+	Id      string
+	Name    string
+	OrderOn string
+	Greedy  bool
+	Sort    string //asc or desc. Default behavior is asc
+	Limit   int    //If 0 or  unspecified then all records are returned and limit is not used
+	Offset  int
+}
+
+// Create the filter from map[string]interface{}
+func (cf *SubCategoryFilter) Create(m map[string]interface{}) {
+	if m == nil {
+		return
+	}
+	cf.Name = m["name"].(string)
+}
+
+func (cf *SubCategoryFilter) GetById(db *database.Handler) (entity.Entity, error) {
+	c := &subCategory.SubCategoryDefinition{}
+	err := db.First(c, "id = ?", cf.Id).Error
+	if err != nil {
+		return nil, registry.ErrGetById(err, cf.Id)
+	}
+	return c, err
+}
+
+func (cf *SubCategoryFilter) Get(db *database.Handler) ([]entity.Entity, int64, int, error) {
+	var scatdb []subCategory.SubCategoryDefinition
+	var scat []entity.Entity
+	finder := db.Model(&scatdb).Debug()
+
+	// total count before pagination
+	var count int64
+
+	if cf.Name != "" {
+		if cf.Greedy {
+			finder = finder.Where("name LIKE ?", "%"+cf.Name+"%")
+		} else {
+			finder = finder.Where("name = ?", cf.Name)
+		}
+	}
+	if cf.Id != "" {
+		finder = finder.Where("id = ?", cf.Id)
+	}
+	if cf.OrderOn != "" {
+		if cf.Sort == "desc" {
+			finder = finder.Order(clause.OrderByColumn{Column: clause.Column{Name: cf.OrderOn}, Desc: true})
+		} else {
+			finder = finder.Order(cf.OrderOn)
+		}
+	}
+
+	finder.Count(&count)
+
+	if cf.Limit != 0 {
+		finder = finder.Limit(cf.Limit)
+	}
+	if cf.Offset != 0 {
+		finder = finder.Offset(cf.Offset)
+	}
+
+	if count == 0 {
+		finder.Count(&count)
+	}
+
+	err := finder.Find(&scatdb).Error
+	if err != nil {
+		return scat, count, int(count), nil
+	}
+
+	for _, c := range scatdb {
+		// resolve for loop scope
+		_c := c
+
+		scat = append(scat, &_c)
+	}
+	// duplicate sub_category ?
+	return scat, count, int(count), nil
+}