// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package db

// VDeck is the metadata for a set of slides.
type VDeck struct {
    Title string
    Thumbnail []byte
}

// VSlide contains the image content for the slide.
type VSlide struct {
    // A low-res version of the image.
    Thumbnail []byte
    // A high-res version of the image.
    // TODO(spetrovic): The type of this field should really be a BlobRef, but we can't reference
    // non-VDLROOT vdl types from Java just yet.
    ImageRef string
}

// VNote contains private-to-the-user notes for a specific slide.
type VNote struct {
    Text string
}

// VPresentation represents a live display of a Deck.
type VPresentation struct {
    // Owner is responsible for advertising the presentation and has full
    // control of it.
    Owner VPerson
    // Driver represents who has control of the presentation.  Usually, it is
    // the presenter, but the presenter can give control to an audience member
    // by changing this field.
    Driver VPerson
}

// VPerson represents either an audience member or the presenter.
type VPerson struct{
    Blessing string
    // The person's full name.
    Name string
}

// VCurrentSlide contains state for the live presentation.  It is separate from the
// VPresentation so that the presenter can temporarily delegate control of the
// VCurrentSlide without giving up control of the entire presentation.
type VCurrentSlide struct {
    // The number of the slide that the presenter is talking about.
    SlideNum int32
    // In the future, we could add markup/doodles here.  That markup would be transient
    // if stored here.  Maybe better to put it in a separate row...
}

// VQuestion represents a member of the audience asking a question of the presenter.
// TODO(kash): Add support for the user to type in their question.  Right now, they
// need to ask their question verbally.
type VQuestion struct {
    // The person who asked the question.
    Questioner VPerson
    // Time when the question was asked in milliseconds since the epoch.
    Time int64
    // Track whether this question has been answered.
    Answered bool
}

// VSession represents UI state that most apps would consider to be ephemeral.
// By storing it in Syncbase, we can resume a session on another device.
// It also simplifies the Android implementation because we don't have to store
// all of this state in a Bundle for each Activity/Fragment.
type VSession struct {
    DeckId string
    PresentationId string
    // When the user is not driving the presentation, he can go forward/back in
    // the deck on his own.  A value of -1 means the user is following the
    // driver of the presentation.
    LocalSlide int32
    // The time that this session was last used in milliseconds since the epoch.
    // This field allows us to find the most recently used session and prompt
    // the user to resume it.
    LastTouched int64
}