First use_case proto

Documents/proto/messaging_extension/use_case_messagerie.uml

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+@startuml
+
+left to right direction
+
+:Student: as s
+:Teacher: as t
+
+
+package "Messagerie"{
+
+(Answer topics) as at
+(Ask appointement) as aa
+(Create Discution) as cd
+(Create Forum) as cf
+(Manage appointement) as ma
+
+s -- at
+s -- aa
+s -- cd
+
+t -- cd
+t -- cf
+t -- ma
+
+(Export to calendar) as etc
+
+aa <-- etc : << extend >>
+ma <-- etc : << extend >>
+
+(Post topics) as pt
+cf <-- pt : << include >>
+pt <|-- (Post poll)
+cd <-- (Send messages) : << include >>
+
+ma <-- (Propose new appointment) : << exlude>> \n [refuse]
+
+}
+
+@enduml