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package hotline
import (
"cmp"
"encoding/binary"
"github.com/stretchr/testify/mock"
"slices"
"sync"
"sync/atomic"
)
type ClientID [2]byte
type ClientManager interface {
List() []*ClientConn // Returns list of sorted clients
Get(id ClientID) *ClientConn
Add(cc *ClientConn)
Delete(id ClientID)
}
type MockClientMgr struct {
mock.Mock
}
func (m *MockClientMgr) List() []*ClientConn {
args := m.Called()
return args.Get(0).([]*ClientConn)
}
func (m *MockClientMgr) Get(id ClientID) *ClientConn {
args := m.Called(id)
return args.Get(0).(*ClientConn)
}
func (m *MockClientMgr) Add(cc *ClientConn) {
m.Called(cc)
}
func (m *MockClientMgr) Delete(id ClientID) {
m.Called(id)
}
type MemClientMgr struct {
clients map[ClientID]*ClientConn
mu sync.Mutex
nextClientID atomic.Uint32
}
func NewMemClientMgr() *MemClientMgr {
return &MemClientMgr{
clients: make(map[ClientID]*ClientConn),
}
}
// List returns slice of sorted clients.
func (cm *MemClientMgr) List() []*ClientConn {
cm.mu.Lock()
defer cm.mu.Unlock()
var clients []*ClientConn
for _, client := range cm.clients {
clients = append(clients, client)
}
slices.SortFunc(clients, func(a, b *ClientConn) int {
return cmp.Compare(
binary.BigEndian.Uint16(a.ID[:]),
binary.BigEndian.Uint16(b.ID[:]),
)
})
return clients
}
func (cm *MemClientMgr) Get(id ClientID) *ClientConn {
cm.mu.Lock()
defer cm.mu.Unlock()
return cm.clients[id]
}
func (cm *MemClientMgr) Add(cc *ClientConn) {
cm.mu.Lock()
defer cm.mu.Unlock()
cm.nextClientID.Add(1)
binary.BigEndian.PutUint16(cc.ID[:], uint16(cm.nextClientID.Load()))
cm.clients[cc.ID] = cc
}
func (cm *MemClientMgr) Delete(id ClientID) {
cm.mu.Lock()
defer cm.mu.Unlock()
delete(cm.clients, id)
}
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