[MM-43649] - Ability for end users to notify admin to upgrade workspace (#20338)

* [MM-43649] - Ability for end users to notify admin to upgrade workspace

* add test case

* move code to app layer

* feedback impl

* feedback impl-1

* feedback impl

* simplify logic

* fix typo and lint

* fix app layers

* Use a single critical section for users notified admin (#20488)

* Use a single critical section for users notifying admin

* change persistence mechanism

* add more tests

* change bot message

* fix translations

* update logic to notify once within cooloff period

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Nathaniel Allred <neallred@protonmail.com>

model/cloud.go

@@ -3,7 +3,11 @@
 
 package model
 
-import "strings"
+import (
+	"os"
+	"strconv"
+	"strings"
+)
 
 const (
 	EventTypeFailedPayment                = "failed-payment"
@@ -37,6 +41,9 @@ const (
 	SubscriptionFamilyOnPrem = SubscriptionFamily("on-prem")
 )
 
+const defaultCloudNotifyAdminCoolOffDays = 30
+const CloudNotifyAdminInfo = "cloud_notify_admin_info"
+
 // Product model represents a product on the cloud system.
 type Product struct {
 	ID                string             `json:"id"`
@@ -228,3 +235,23 @@ type ProductLimits struct {
 	Messages     *MessagesLimits     `json:"messages,omitempty"`
 	Teams        *TeamsLimits        `json:"teams,omitempty"`
 }
+
+type NotifyAdminToUpgradeRequest struct {
+	CurrentTeamId string `json:"current_team_id"`
+}
+
+type AdminNotificationUserInfo struct {
+	LastUserIDToNotify        string
+	LastNotificationTimestamp int64
+}
+
+func CanNotify(lastNotificationTimestamp int64) bool {
+	coolOffPeriodDaysEnv := os.Getenv("MM_CLOUD_NOTIFY_ADMIN_COOL_OFF_DAYS")
+	coolOffPeriodDays, parseError := strconv.ParseFloat(coolOffPeriodDaysEnv, 64)
+	if parseError != nil {
+		coolOffPeriodDays = defaultCloudNotifyAdminCoolOffDays
+	}
+	daysToMillis := coolOffPeriodDays * 24 * 60 * 60 * 1000
+	timeDiff := GetMillis() - lastNotificationTimestamp
+	return timeDiff >= int64(daysToMillis)
+}