conversations

type Service interface {
	// Internal
	ListConversations() ([]core.Conversation, error)

	// conversation member only access
	LeaveConversation(userCtx, conversationID, newAdmin int) error
	ListUsersOfConversation(userCtx int, conversationID int) ([]core.UserInConversation, error)

	// Admin only access
	InviteUser(userCtx, recipient, conversationID int) error
	RevokeInvitation(userCtx, userID, conversationID int) error
	RemoveUserFromConversation(userCtx, userID, conversationID int) error
	DeleteConversation(userCtx, conversationID int) error
	SetAdminStatus(userCtx, newAdmin, conversationID int, status bool) error
	EditConversation(userCtx int, conversation core.Conversation) (core.Conversation, error)

	// Restricted access
	ListConversationsForUser(userCtx int) ([]core.Conversation, error)
	ListInvitations(userCtx int) ([]core.Invitation, error)
	DenieInvitation(userCtx, conversationID int) error
	JoinConversation(userCtx, conversationID int) (int, error)
	CreateConversation(userCtx int, title, repoURL string, initialMembers []int) (core.Conversation, error)
}