add last seen field to client (fixes #400)

api/application_test.go

@@ -91,8 +91,9 @@ func (s *ApplicationSuite) Test_ensureApplicationHasCorrectJsonRepresentation()
 		Description: "mydesc",
 		Image:       "asd",
 		Internal:    true,
+		LastUsed:    nil,
 	}
-	test.JSONEquals(s.T(), actual, `{"id":1,"token":"Aasdasfgeeg","name":"myapp","description":"mydesc", "image": "asd", "internal":true, "defaultPriority":0}`)
+	test.JSONEquals(s.T(), actual, `{"id":1,"token":"Aasdasfgeeg","name":"myapp","description":"mydesc", "image": "asd", "internal":true, "defaultPriority":0, "lastUsed":null}`)
 }
 
 func (s *ApplicationSuite) Test_CreateApplication_expectBadRequestOnEmptyName() {

api/client_test.go

@@ -58,7 +58,7 @@ func (s *ClientSuite) AfterTest(suiteName, testName string) {
 
 func (s *ClientSuite) Test_ensureClientHasCorrectJsonRepresentation() {
 	actual := &model.Client{ID: 1, UserID: 2, Token: "Casdasfgeeg", Name: "myclient"}
-	test.JSONEquals(s.T(), actual, `{"id":1,"token":"Casdasfgeeg","name":"myclient"}`)
+	test.JSONEquals(s.T(), actual, `{"id":1,"token":"Casdasfgeeg","name":"myclient","lastUsed":null}`)
 }
 
 func (s *ClientSuite) Test_CreateClient_mapAllParameters() {

api/stream/stream.go

@@ -37,6 +37,19 @@ func New(pingPeriod, pongTimeout time.Duration, allowedWebSocketOrigins []string
 	}
 }
 
+// CollectConnectedClientTokens returns all tokens of the connected clients.
+func (a *API) CollectConnectedClientTokens() []string {
+	a.lock.RLock()
+	defer a.lock.RUnlock()
+	var clients []string
+	for _, cs := range a.clients {
+		for _, c := range cs {
+			clients = append(clients, c.token)
+		}
+	}
+	return uniq(clients)
+}
+
 // NotifyDeletedUser closes existing connections for the given user.
 func (a *API) NotifyDeletedUser(userID uint) error {
 	a.lock.Lock()
@@ -155,6 +168,18 @@ func (a *API) Close() {
 	}
 }
 
+func uniq[T comparable](s []T) []T {
+	m := make(map[T]struct{})
+	for _, v := range s {
+		m[v] = struct{}{}
+	}
+	var r []T
+	for k := range m {
+		r = append(r, k)
+	}
+	return r
+}
+
 func isAllowedOrigin(r *http.Request, allowedOrigins []*regexp.Regexp) bool {
 	origin := r.Header.Get("origin")
 	if origin == "" {

api/stream/stream_test.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/http/httptest"
+	"sort"
 	"strings"
 	"testing"
 	"time"
@@ -56,8 +57,8 @@ func TestWriteMessageFails(t *testing.T) {
 	wsURL := wsURL(server.URL)
 	user := testClient(t, wsURL)
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, 1)
+
 	clients := clients(api, 1)
 	assert.NotEmpty(t, clients)
 
@@ -86,13 +87,13 @@ func TestWritePingFails(t *testing.T) {
 	user := testClient(t, wsURL)
 	defer user.conn.Close()
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, 1)
+
 	clients := clients(api, 1)
 
 	assert.NotEmpty(t, clients)
 
-	time.Sleep(api.pingPeriod) // waiting for ping
+	time.Sleep(api.pingPeriod + (50 * time.Millisecond)) // waiting for ping
 
 	api.Notify(1, &model.MessageExternal{Message: "HI"})
 	user.expectNoMessage()
@@ -147,8 +148,8 @@ func TestCloseClientOnNotReading(t *testing.T) {
 	assert.Nil(t, err)
 	defer ws.Close()
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, 1)
+
 	assert.NotEmpty(t, clients(api, 1))
 
 	time.Sleep(api.pingPeriod + api.pongTimeout)
@@ -167,8 +168,9 @@ func TestMessageDirectlyAfterConnect(t *testing.T) {
 
 	user := testClient(t, wsURL)
 	defer user.conn.Close()
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+
+	waitForConnectedClients(api, 1)
+
 	api.Notify(1, &model.MessageExternal{Message: "msg"})
 	user.expectMessage(&model.MessageExternal{Message: "msg"})
 }
@@ -184,8 +186,9 @@ func TestDeleteClientShouldCloseConnection(t *testing.T) {
 
 	user := testClient(t, wsURL)
 	defer user.conn.Close()
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+
+	waitForConnectedClients(api, 1)
+
 	api.Notify(1, &model.MessageExternal{Message: "msg"})
 	user.expectMessage(&model.MessageExternal{Message: "msg"})
 
@@ -230,8 +233,7 @@ func TestDeleteMultipleClients(t *testing.T) {
 	defer userThreeAndroid.conn.Close()
 	userThree := []*testingClient{userThreeAndroid}
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, len(userOne)+len(userTwo)+len(userThree))
 
 	api.Notify(1, &model.MessageExternal{ID: 4, Message: "there"})
 	expectMessage(&model.MessageExternal{ID: 4, Message: "there"}, userOne...)
@@ -294,8 +296,7 @@ func TestDeleteUser(t *testing.T) {
 	defer userThreeAndroid.conn.Close()
 	userThree := []*testingClient{userThreeAndroid}
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, len(userOne)+len(userTwo)+len(userThree))
 
 	api.Notify(1, &model.MessageExternal{ID: 4, Message: "there"})
 	expectMessage(&model.MessageExternal{ID: 4, Message: "there"}, userOne...)
@@ -322,6 +323,43 @@ func TestDeleteUser(t *testing.T) {
 	api.Close()
 }
 
+func TestCollectConnectedClientTokens(t *testing.T) {
+	mode.Set(mode.TestDev)
+
+	defer leaktest.Check(t)()
+	userIDs := []uint{1, 1, 1, 2, 2}
+	tokens := []string{"1-1", "1-2", "1-2", "2-1", "2-2"}
+	i := 0
+	server, api := bootTestServer(func(context *gin.Context) {
+		auth.RegisterAuthentication(context, nil, userIDs[i], tokens[i])
+		i++
+	})
+	defer server.Close()
+
+	wsURL := wsURL(server.URL)
+	userOneConnOne := testClient(t, wsURL)
+	defer userOneConnOne.conn.Close()
+	userOneConnTwo := testClient(t, wsURL)
+	defer userOneConnTwo.conn.Close()
+	userOneConnThree := testClient(t, wsURL)
+	defer userOneConnThree.conn.Close()
+	waitForConnectedClients(api, 3)
+
+	ret := api.CollectConnectedClientTokens()
+	sort.Strings(ret)
+	assert.Equal(t, []string{"1-1", "1-2"}, ret)
+
+	userTwoConnOne := testClient(t, wsURL)
+	defer userTwoConnOne.conn.Close()
+	userTwoConnTwo := testClient(t, wsURL)
+	defer userTwoConnTwo.conn.Close()
+	waitForConnectedClients(api, 5)
+
+	ret = api.CollectConnectedClientTokens()
+	sort.Strings(ret)
+	assert.Equal(t, []string{"1-1", "1-2", "2-1", "2-2"}, ret)
+}
+
 func TestMultipleClients(t *testing.T) {
 	mode.Set(mode.TestDev)
 
@@ -354,8 +392,7 @@ func TestMultipleClients(t *testing.T) {
 	defer userThreeAndroid.conn.Close()
 	userThree := []*testingClient{userThreeAndroid}
 
-	// the server may take some time to register the client
-	time.Sleep(100 * time.Millisecond)
+	waitForConnectedClients(api, len(userOne)+len(userTwo)+len(userThree))
 
 	// there should not be messages at the beginning
 	expectNoMessage(userOne...)
@@ -474,6 +511,17 @@ func clients(api *API, user uint) []*client {
 	return api.clients[user]
 }
 
+func countClients(a *API) int {
+	a.lock.RLock()
+	defer a.lock.RUnlock()
+
+	var i int
+	for _, clients := range a.clients {
+		i += len(clients)
+	}
+	return i
+}
+
 func testClient(t *testing.T, url string) *testingClient {
 	client := createClient(t, url)
 	startReading(client)
@@ -560,3 +608,13 @@ func staticUserID() gin.HandlerFunc {
 		auth.RegisterAuthentication(context, nil, 1, "customtoken")
 	}
 }
+
+func waitForConnectedClients(api *API, count int) {
+	for i := 0; i < 10; i++ {
+		if countClients(api) == count {
+			// ok
+			return
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+}

auth/authentication.go

@@ -3,6 +3,7 @@
 import (
 	"errors"
 	"strings"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/gotify/server/v2/auth/password"
@@ -20,6 +21,8 @@
 	GetPluginConfByToken(token string) (*model.PluginConf, error)
 	GetUserByName(name string) (*model.User, error)
 	GetUserByID(id uint) (*model.User, error)
+	UpdateClientTokensLastUsed(tokens []string, t *time.Time) error
+	UpdateApplicationTokenLastUsed(token string, t *time.Time) error
 }
 
 // Auth is the provider for authentication middleware.
@@ -56,10 +59,16 @@
 		if user != nil {
 			return true, true, user.ID, nil
 		}
-		if token, err := a.DB.GetClientByToken(tokenID); err != nil {
+		if client, err := a.DB.GetClientByToken(tokenID); err != nil {
 			return false, false, 0, err
-		} else if token != nil {
-			return true, true, token.UserID, nil
+		} else if client != nil {
+			now := time.Now()
+			if client.LastUsed == nil || client.LastUsed.Add(5*time.Minute).Before(now) {
+				if err := a.DB.UpdateClientTokensLastUsed([]string{tokenID}, &now); err != nil {
+					return false, false, 0, err
+				}
+			}
+			return true, true, client.UserID, nil
 		}
 		return false, false, 0, nil
 	})
@@ -71,10 +80,16 @@
 		if user != nil {
 			return true, false, 0, nil
 		}
-		if token, err := a.DB.GetApplicationByToken(tokenID); err != nil {
+		if app, err := a.DB.GetApplicationByToken(tokenID); err != nil {
 			return false, false, 0, err
-		} else if token != nil {
-			return true, true, token.UserID, nil
+		} else if app != nil {
+			now := time.Now()
+			if app.LastUsed == nil || app.LastUsed.Add(5*time.Minute).Before(now) {
+				if err := a.DB.UpdateApplicationTokenLastUsed(tokenID, &now); err != nil {
+					return false, false, 0, err
+				}
+			}
+			return true, true, app.UserID, nil
 		}
 		return false, false, 0, nil
 	})

database/application.go

@@ -1,6 +1,8 @@
 package database
 
 import (
+	"time"
+
 	"github.com/gotify/server/v2/model"
 	"github.com/jinzhu/gorm"
 )
@@ -56,3 +58,8 @@ func (d *GormDatabase) GetApplicationsByUser(userID uint) ([]*model.Application,
 func (d *GormDatabase) UpdateApplication(app *model.Application) error {
 	return d.DB.Save(app).Error
 }
+
+// UpdateApplicationTokenLastUsed updates the last used time of the application token.
+func (d *GormDatabase) UpdateApplicationTokenLastUsed(token string, t *time.Time) error {
+	return d.DB.Model(&model.Application{}).Where("token = ?", token).Update("last_used", t).Error
+}

database/application_test.go

@@ -1,6 +1,8 @@
 package database
 
 import (
+	"time"
+
 	"github.com/gotify/server/v2/model"
 	"github.com/stretchr/testify/assert"
 )
@@ -40,6 +42,14 @@ func (s *DatabaseSuite) TestApplication() {
 		assert.Equal(s.T(), app, newApp)
 	}
 
+	lastUsed := time.Now().Add(-time.Hour)
+	s.db.UpdateApplicationTokenLastUsed(app.Token, &lastUsed)
+	newApp, err = s.db.GetApplicationByID(app.ID)
+	if assert.NoError(s.T(), err) {
+		assert.Equal(s.T(), lastUsed.Unix(), newApp.LastUsed.Unix())
+	}
+	app.LastUsed = &lastUsed
+
 	newApp.Image = "asdasd"
 	assert.NoError(s.T(), s.db.UpdateApplication(newApp))
 

database/client.go

@@ -1,6 +1,8 @@
 package database
 
 import (
+	"time"
+
 	"github.com/gotify/server/v2/model"
 	"github.com/jinzhu/gorm"
 )
@@ -55,3 +57,8 @@ func (d *GormDatabase) DeleteClientByID(id uint) error {
 func (d *GormDatabase) UpdateClient(client *model.Client) error {
 	return d.DB.Save(client).Error
 }
+
+// UpdateClientTokensLastUsed updates the last used timestamp of clients.
+func (d *GormDatabase) UpdateClientTokensLastUsed(tokens []string, t *time.Time) error {
+	return d.DB.Model(&model.Client{}).Where("token IN (?)", tokens).Update("last_used", t).Error
+}

database/client_test.go

@@ -1,6 +1,8 @@
 package database
 
 import (
+	"time"
+
 	"github.com/gotify/server/v2/model"
 	"github.com/stretchr/testify/assert"
 )
@@ -44,6 +46,13 @@ func (s *DatabaseSuite) TestClient() {
 		assert.Equal(s.T(), updateClient, updatedClient)
 	}
 
+	lastUsed := time.Now().Add(-time.Hour)
+	s.db.UpdateClientTokensLastUsed([]string{client.Token}, &lastUsed)
+	newClient, err = s.db.GetClientByID(client.ID)
+	if assert.NoError(s.T(), err) {
+		assert.Equal(s.T(), lastUsed.Unix(), newClient.LastUsed.Unix())
+	}
+
 	s.db.DeleteClientByID(client.ID)
 
 	if clients, err := s.db.GetClientsByUser(user.ID); assert.NoError(s.T(), err) {