frostfs-sdk-go/container/attribute.go
Alex Vanin e89a0d88d2 [#168] container: Remove pointer tricks from setAttribute
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
2022-03-15 16:59:59 +03:00

139 lines
2.9 KiB
Go

package container
import (
"github.com/nspcc-dev/neofs-api-go/v2/container"
)
type (
Attribute container.Attribute
Attributes []Attribute
)
// NewAttribute creates and initializes blank Attribute.
//
// Defaults:
// - key: "";
// - value: "".
func NewAttribute() *Attribute {
return NewAttributeFromV2(new(container.Attribute))
}
func (a *Attribute) SetKey(v string) {
(*container.Attribute)(a).SetKey(v)
}
func (a *Attribute) SetValue(v string) {
(*container.Attribute)(a).SetValue(v)
}
func (a *Attribute) Key() string {
return (*container.Attribute)(a).GetKey()
}
func (a *Attribute) Value() string {
return (*container.Attribute)(a).GetValue()
}
// NewAttributeFromV2 wraps protocol dependent version of
// Attribute message.
//
// Nil container.Attribute converts to nil.
func NewAttributeFromV2(v *container.Attribute) *Attribute {
return (*Attribute)(v)
}
// ToV2 converts Attribute to v2 Attribute message.
//
// Nil Attribute converts to nil.
func (a *Attribute) ToV2() *container.Attribute {
return (*container.Attribute)(a)
}
func NewAttributesFromV2(v []container.Attribute) Attributes {
if v == nil {
return nil
}
attrs := make(Attributes, len(v))
for i := range v {
attrs[i] = *NewAttributeFromV2(&v[i])
}
return attrs
}
func (a Attributes) ToV2() []container.Attribute {
if a == nil {
return nil
}
attrs := make([]container.Attribute, len(a))
for i := range a {
attrs[i] = *a[i].ToV2()
}
return attrs
}
// sets value of the attribute by key.
func setAttribute(c *Container, key, value string) {
attrs := c.Attributes()
found := false
for i := range attrs {
if attrs[i].Key() == key {
attrs[i].SetValue(value)
found = true
break
}
}
if !found {
index := len(attrs)
attrs = append(attrs, Attribute{})
attrs[index].SetKey(key)
attrs[index].SetValue(value)
}
c.SetAttributes(attrs)
}
// iterates over container attributes. Stops at f's true return.
//
// Handler must not be nil.
func iterateAttributes(c *Container, f func(*Attribute) bool) {
attrs := c.Attributes()
for i := range attrs {
if f(&attrs[i]) {
return
}
}
}
// SetNativeNameWithZone sets container native name and its zone.
//
// Use SetNativeName to set default zone.
func SetNativeNameWithZone(c *Container, name, zone string) {
setAttribute(c, container.SysAttributeName, name)
setAttribute(c, container.SysAttributeZone, zone)
}
// SetNativeName sets container native name with default zone (container).
func SetNativeName(c *Container, name string) {
SetNativeNameWithZone(c, name, container.SysAttributeZoneDefault)
}
// GetNativeNameWithZone returns container native name and its zone.
func GetNativeNameWithZone(c *Container) (name string, zone string) {
iterateAttributes(c, func(a *Attribute) bool {
if key := a.Key(); key == container.SysAttributeName {
name = a.Value()
} else if key == container.SysAttributeZone {
zone = a.Value()
}
return name != "" && zone != ""
})
return
}