Auth Proxy: replace ini setting ldap_sync_ttl with sync_ttl (#20191)

* Renamed ttl config in code to be more consistent with behaviour
* Introduced new setting `sync_ttl` in .ini file
* Keeping the old setting `ldap_sync_ttl` in the .ini file as fallback and compatibility.

pkg/setting/setting.go

@@ -147,7 +147,7 @@ var (
 	AuthProxyHeaderName     string
 	AuthProxyHeaderProperty string
 	AuthProxyAutoSignUp     bool
-	AuthProxyLDAPSyncTtl    int
+	AuthProxySyncTtl        int
 	AuthProxyWhitelist      string
 	AuthProxyHeaders        map[string]string
 
@@ -854,7 +854,17 @@ func (cfg *Cfg) Load(args *CommandLineArgs) error {
 		return err
 	}
 	AuthProxyAutoSignUp = authProxy.Key("auto_sign_up").MustBool(true)
-	AuthProxyLDAPSyncTtl = authProxy.Key("ldap_sync_ttl").MustInt()
+
+	ldapSyncVal := authProxy.Key("ldap_sync_ttl").MustInt()
+	syncVal := authProxy.Key("sync_ttl").MustInt()
+
+	if ldapSyncVal != 60 {
+		AuthProxySyncTtl = ldapSyncVal
+		cfg.Logger.Warn("[Deprecated] the configuration setting 'ldap_sync_ttl' is deprecated, please use 'sync_ttl' instead")
+	} else {
+		AuthProxySyncTtl = syncVal
+	}
+
 	AuthProxyWhitelist, err = valueAsString(authProxy, "whitelist", "")
 	if err != nil {
 		return err

pkg/setting/setting_test.go

@@ -227,6 +227,50 @@ func TestLoadingSettings(t *testing.T) {
 
 			So(cfg.RendererCallbackUrl, ShouldEqual, "http://myserver/renderer/")
 		})
+
+		Convey("Only sync_ttl should return the value sync_ttl", func() {
+			cfg := NewCfg()
+			err := cfg.Load(&CommandLineArgs{
+				HomePath: "../../",
+				Args:     []string{"cfg:auth.proxy.sync_ttl=2"},
+			})
+			So(err, ShouldBeNil)
+
+			So(AuthProxySyncTtl, ShouldEqual, 2)
+		})
+
+		Convey("Only ldap_sync_ttl should return the value ldap_sync_ttl", func() {
+			cfg := NewCfg()
+			err := cfg.Load(&CommandLineArgs{
+				HomePath: "../../",
+				Args:     []string{"cfg:auth.proxy.ldap_sync_ttl=5"},
+			})
+			So(err, ShouldBeNil)
+
+			So(AuthProxySyncTtl, ShouldEqual, 5)
+		})
+
+		Convey("ldap_sync should override ldap_sync_ttl that is default value", func() {
+			cfg := NewCfg()
+			err := cfg.Load(&CommandLineArgs{
+				HomePath: "../../",
+				Args:     []string{"cfg:auth.proxy.sync_ttl=5"},
+			})
+			So(err, ShouldBeNil)
+
+			So(AuthProxySyncTtl, ShouldEqual, 5)
+		})
+
+		Convey("ldap_sync should not override ldap_sync_ttl that is different from default value", func() {
+			cfg := NewCfg()
+			err := cfg.Load(&CommandLineArgs{
+				HomePath: "../../",
+				Args:     []string{"cfg:auth.proxy.ldap_sync_ttl=12", "cfg:auth.proxy.sync_ttl=5"},
+			})
+			So(err, ShouldBeNil)
+
+			So(AuthProxySyncTtl, ShouldEqual, 12)
+		})
 	})
 
 	Convey("Test reading string values from .ini file", t, func() {