PLT-7810 Track if an APIv3 endpoint was used in the last day (#7744)

* Track if an APIv3 endpoint was used in the last day

* Make it atomic

api/context.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	l4g "github.com/alecthomas/log4go"
@@ -216,6 +217,10 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		c.CheckTeamId()
 	}
 
+	if h.isApi {
+		atomic.StoreInt32(model.UsedApiV3, 1)
+	}
+
 	if c.Err == nil {
 		h.handleFunc(c, w, r)
 	}

app/diagnostics.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"os"
 	"runtime"
+	"sync/atomic"
 
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/utils"
@@ -171,7 +172,10 @@ func (a *App) trackActivity() {
 		"public_channels_deleted":   deletedPublicChannelCount,
 		"private_channels_deleted":  deletedPrivateChannelCount,
 		"posts":                     postsCount,
+		"used_apiv3":                atomic.LoadInt32(model.UsedApiV3) == 1,
 	})
+
+	atomic.StoreInt32(model.UsedApiV3, 0)
 }
 
 func (a *App) trackConfig() {

model/client.go

@@ -18,6 +18,8 @@ import (
 	l4g "github.com/alecthomas/log4go"
 )
 
+var UsedApiV3 *int32 = new(int32)
+
 const (
 	HEADER_REQUEST_ID         = "X-Request-ID"
 	HEADER_VERSION_ID         = "X-Version-ID"