Initial cloud-services repo - gateway service + pkg modules

pkg/db/queries/helper.go

@@ -0,0 +1,39 @@
+package queries
+
+import (
+	"fmt"
+	"net/http"
+
+	"fiskerinc.com/modules/validator"
+
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+)
+
+type PageQueryOptions struct {
+	Order  string   `json:"order" validate:"max=512,sqlorder"` // Order only allows one field to be ordered, allows ASC and DESC as well. Leave empty to not apply order
+	Limit  int      `json:"limit" validate:"gte=0,lte=100"`
+	Offset int      `json:"offset" validate:"gte=0"`
+	Ignore []string `json:"ignore" validate:"dive"`
+}
+
+var PageQueryOptionsLimitMaximum = 100
+
+func (p *PageQueryOptions) String() string {
+	return fmt.Sprintf("PageQueryOptions<%s %d %d>", p.Order, p.Limit, p.Offset)
+}
+
+// ParsePageQuery parses PageQueryOptions from http request
+func ParsePageQuery(r *http.Request) (*PageQueryOptions, error) {
+	decoder := schema.NewDecoder()
+	options := PageQueryOptions{}
+
+	decoder.SetAliasTag("json")
+	decoder.Decode(&options, r.URL.Query())
+	err := validator.ValidateStruct(options)
+	if err == nil && options.Limit == 0 {
+		options.Limit = PageQueryOptionsLimitMaximum
+	}
+
+	return &options, errors.WithStack(err)
+}