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entity_id.go
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entity_id.go
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package models
import (
"fmt"
"strings"
)
type EntityIDType string
const (
UsernameType EntityIDType = "@"
ChatAliasType EntityIDType = "#"
ChatIDType EntityIDType = "!"
ThirdPIDType EntityIDType = "%"
OtherType EntityIDType = "&"
)
type EntityID struct {
Type EntityIDType
LocalPart string
ServerPart string
Attr string
OnlyServerPart bool
}
func NewEntityIDFromString(entityID string) (*EntityID, error) {
eid := &EntityID{}
typ := string(entityID[0])
withAttr := false
localAndServerPart := strings.Split(entityID, "@")
if localAndServerPart[0] == "" {
localAndServerPart = localAndServerPart[1:]
}
if len(localAndServerPart) == 1 {
eid.ServerPart = localAndServerPart[0]
eid.OnlyServerPart = true
return eid, nil
}
switch EntityIDType(typ) {
case UsernameType:
fallthrough
case ChatAliasType:
fallthrough
case ChatIDType:
{
eid.Type = EntityIDType(typ)
}
case ThirdPIDType:
fallthrough
case OtherType:
{
eid.Type = EntityIDType(typ)
withAttr = true
}
default:
return nil, fmt.Errorf("invalid entity id type: %s", typ)
}
if !withAttr {
eid.LocalPart = localAndServerPart[0]
eid.ServerPart = localAndServerPart[1]
} else {
attrAndLocal := strings.Split(localAndServerPart[0], ":")
attr := attrAndLocal[0][1:]
eid.Attr = attr
eid.LocalPart = attrAndLocal[1]
eid.ServerPart = localAndServerPart[len(localAndServerPart)-1]
}
return eid, nil
}
func NewEntityID(typ, localPart, serverPart string) (*EntityID, error) {
eid := &EntityID{}
switch EntityIDType(typ) {
case UsernameType:
fallthrough
case ChatAliasType:
fallthrough
case ChatIDType:
{
eid.Type = EntityIDType(typ)
}
default:
return nil, fmt.Errorf("invalid entity id type: %s", typ)
}
eid.LocalPart = localPart
eid.ServerPart = serverPart
return eid, nil
}
func NewEntityIDWithAttr(typ, attr, localPart, serverPart string) (*EntityID, error) {
eid := &EntityID{}
switch EntityIDType(typ) {
case OtherType:
fallthrough
case ThirdPIDType:
{
eid.Type = EntityIDType(typ)
}
default:
return nil, fmt.Errorf("invalid entity id type: %s", typ)
}
eid.Attr = attr
eid.LocalPart = localPart
eid.ServerPart = serverPart
return eid, nil
}
func (eID *EntityID) String() string {
if eID.Attr != "" {
return fmt.Sprintf("%s%s:%s@%s", eID.Type, eID.Attr, eID.LocalPart, eID.ServerPart)
}
return fmt.Sprintf("%s%s@%s", eID.Type, eID.LocalPart, eID.ServerPart)
}