More app code migration (#5170)

* Migrate admin functions into app package

* More user function refactoring

* Move post functions into app package

app/ldap.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package app
+
+import (
+	"net/http"
+
+	l4g "github.com/alecthomas/log4go"
+	"github.com/mattermost/platform/einterfaces"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
+)
+
+func SyncLdap() {
+	go func() {
+		if utils.IsLicensed && *utils.License.Features.LDAP && *utils.Cfg.LdapSettings.Enable {
+			if ldapI := einterfaces.GetLdapInterface(); ldapI != nil {
+				ldapI.SyncNow()
+			} else {
+				l4g.Error("%v", model.NewLocAppError("ldapSyncNow", "ent.ldap.disabled.app_error", nil, "").Error())
+			}
+		}
+	}()
+}
+
+func TestLdap() *model.AppError {
+	if ldapI := einterfaces.GetLdapInterface(); ldapI != nil && utils.IsLicensed && *utils.License.Features.LDAP && *utils.Cfg.LdapSettings.Enable {
+		if err := ldapI.RunTest(); err != nil {
+			err.StatusCode = 500
+			return err
+		}
+	} else {
+		err := model.NewLocAppError("ldapTest", "ent.ldap.disabled.app_error", nil, "")
+		err.StatusCode = http.StatusNotImplemented
+		return err
+	}
+
+	return nil
+}