@startuml
skinparam style strictuml
participant ":Folder\nController" as FC
participant ":Évalue\nTon\nSavoir" as ETS
participant ":Map<string, User>" as MUS
participant "user:User" as U
participant "f:Folder" as F
participant "FolderService" as FS
participant "UserRepository" as UR
participant "FolderRepository" as FR
database "Database" as DB

-> FC: addFolder(folderName: string,\nuserId: string)
FC -> ETS : user = getUser(userId: string)
note right: by Expert
ETS -> MUS : user = find(userId)
note right: id to object
FC -> ETS : f = createFolder(folderName: string,\nuser: User)
create F
ETS -->> F : <<create>>
note right: by Creator (ETS\naggregates Folder)
ETS -> U : addFolder(f)
note right: by Expert

ETS -> FS: addFolderToUser(user, f)
FS -> FR: save(f)
FR -> DB: insertOne(f)
DB --> FR: insertedId
FR --> FS: save result

FS -> UR: update(user)
UR -> DB: updateOne({ _id: user._id }, { $set: { folders: user.folders } })
DB --> UR: update result
UR --> FS: update result

FS --> ETS: success
ETS --> FC: success
@enduml