Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/usage.go

@@ -0,0 +1,58 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package app
+
+import (
+	"net/http"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils"
+)
+
+// GetPostsUsage returns the total posts count rounded down to the most
+// significant digit
+func (a *App) GetPostsUsage() (int64, *model.AppError) {
+	count, err := a.Srv().Store().Post().AnalyticsPostCount(&model.PostCountOptions{ExcludeDeleted: true, UsersPostsOnly: true, AllowFromCache: true})
+	if err != nil {
+		return 0, model.NewAppError("GetPostsUsage", "app.post.analytics_posts_count.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	return utils.RoundOffToZeroesResolution(float64(count), 3), nil
+}
+
+// GetStorageUsage returns the sum of files' sizes stored on this instance
+func (a *App) GetStorageUsage() (int64, *model.AppError) {
+	usage, err := a.Srv().Store().FileInfo().GetStorageUsage(true, false)
+	if err != nil {
+		return 0, model.NewAppError("GetStorageUsage", "app.usage.get_storage_usage.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+	return usage, nil
+}
+
+func (a *App) GetTeamsUsage() (*model.TeamsUsage, *model.AppError) {
+	usage := &model.TeamsUsage{}
+	includeDeleted := false
+	teamCount, err := a.Srv().Store().Team().AnalyticsTeamCount(&model.TeamSearch{IncludeDeleted: &includeDeleted})
+	if err != nil {
+		return nil, model.NewAppError("GetTeamsUsage", "app.post.analytics_teams_count.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	usage.Active = teamCount
+
+	allTeams, appErr := a.GetAllTeams()
+	if appErr != nil {
+		return nil, appErr
+	}
+
+	cloudArchivedTeamCount := 0
+
+	for _, team := range allTeams {
+		if team.DeleteAt > 0 && team.CloudLimitsArchived {
+			cloudArchivedTeamCount += 1
+		}
+	}
+
+	usage.CloudArchived = int64(cloudArchivedTeamCount)
+	return usage, nil
+}