private async Task ReplyImageCarouselAsync(string replyToken, string blobDirectoryName)
{
var columns = BlobStorage.ListBlobUri(blobDirectoryName)
.Select(uri =>
new ImageCarouselColumn(uri.ToString(),
new MessageTemplateAction(uri.Segments.Last(), $"I selected image {uri.Segments.Last()}!"))).ToList();
if (columns.Count == 0)
{
await MessagingClient.ReplyMessageAsync(replyToken, "Upload image for \"Carousel Message\".");
return;
}
var template = new ImageCarouselTemplate(columns);
await MessagingClient.ReplyMessageAsync(replyToken, new[] { new TemplateMessage("imageCarousel", template) });
}
private async Task UploadImageAsync(string replyToken, string messageId, string blobDirectoryName)
{
var imageStream = await MessagingClient.GetContentStreamAsync(messageId);
var image = Image.FromStream(imageStream);
var imageCount = BlobStorage.ListBlobUri(blobDirectoryName).Count();
if (imageCount == 5)
{
await BlobStorage.DeleteDirectoryAsync(blobDirectoryName);
imageCount = 0;
}
await BlobStorage.UploadImageAsync(image, blobDirectoryName, (imageCount + 1) + ".jpeg");
await MessagingClient.ReplyMessageAsync(replyToken, $"Image uploaded ({imageCount + 1}).");
}
protected override async Task OnMessageAsync(MessageEvent ev)
{
var msg = ev.Message as TextEventMessage;
if (msg == null)
{
return;
}
switch (msg.Text)
{
case "Rectangle-Cover":
await ReplyCarouselTemplateMessageAsync(ev.ReplyToken, ImageAspectRatioType.Rectangle, ImageSizeType.Cover);
break;
case "Square-Contain":
await ReplyCarouselTemplateMessageAsync(ev.ReplyToken, ImageAspectRatioType.Square, ImageSizeType.Contain);
break;
case "Square-Cover":
await ReplyCarouselTemplateMessageAsync(ev.ReplyToken, ImageAspectRatioType.Square, ImageSizeType.Cover);
break;
case "Rectangle-Contein":
default:
await ReplyCarouselTemplateMessageAsync(ev.ReplyToken, ImageAspectRatioType.Rectangle, ImageSizeType.Contain);
break;
}
async Task ReplyCarouselTemplateMessageAsync(string replyToken, ImageAspectRatioType imageAspectRatio, ImageSizeType imageSize)
{
var imageUri = BlobStorage.ListBlobUri(blobDirectoryName).FirstOrDefault(uri => uri.ToString().EndsWith(imageName));
if (imageUri == null)
{
imageUri = await BlobStorage.UploadImageAsync(Properties.Resources.sample_image, blobDirectoryName, imageName);
}
var defaultAction = new MessageTemplateAction("Default-Action", "Default-Action");
var templateMessage = new TemplateMessage("CarouselTemplate",
new CarouselTemplate(new[]
{
new CarouselColumn(
imageAspectRatio + "-" + imageSize,
imageUri.ToString(),
"Test of thumbnail image settings",
new [] { new MessageTemplateAction("Rectangle-Contain", "Rectangle-Contain") },
"#FF0000",
defaultAction),
new CarouselColumn(
imageAspectRatio + "-" + imageSize,
imageUri.ToString(),
"Test of thumbnail image settings",
new [] { new MessageTemplateAction("Rectangle-Cover", "Rectangle-Cover") },
"#00FF00",
defaultAction),
new CarouselColumn(
imageAspectRatio + "-" + imageSize,
imageUri.ToString(),
"Test of thumbnail image settings",
new [] { new MessageTemplateAction("Square-Contain", "Square-Contain") },
"#0000FF",
defaultAction),
new CarouselColumn(
imageAspectRatio + "-" + imageSize,
imageUri.ToString(),
"Test of thumbnail image settings",
new [] { new MessageTemplateAction("Square-Cover", "Square-Cover") },
"#FF00FF",
defaultAction)
},
imageAspectRatio,
imageSize));
await MessagingClient.ReplyMessageAsync(replyToken, new[] { templateMessage });
}
}
