private async Task EchoImageAsync(string replyToken, string messageId, string blobDirectoryName)
{
var imageName = messageId + ".jpeg";
var previewImageName = messageId + "_preview.jpeg";
var imageStream = await MessagingClient.GetContentStreamAsync(messageId);
var image = Image.FromStream(imageStream);
var previewImage = image.GetThumbnailImage((int)(image.Width * 0.25), (int)(image.Height * 0.25), () => false, IntPtr.Zero);
var blobImagePath = await BlobStorage.UploadImageAsync(image, blobDirectoryName, imageName);
var blobPreviewPath = await BlobStorage.UploadImageAsync(previewImage, blobDirectoryName, previewImageName);
await MessagingClient.ReplyMessageAsync(replyToken, new[] { new ImageMessage(blobImagePath.ToString(), blobPreviewPath.ToString()) });
}
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}).");
}
private async Task ReplyImagemapAsync(string replyToken, string messageId, string blobDirectoryName)
{
var imageStream = await MessagingClient.GetContentStreamAsync(messageId);
var image = Image.FromStream(imageStream);
using (var g = Graphics.FromImage(image))
{
g.DrawLine(Pens.Red, image.Width / 2, 0, image.Width / 2, image.Height);
g.DrawLine(Pens.Red, 0, image.Height / 2, image.Width, image.Height / 2);
}
var uri = await UploadImageAsync(1040);
await UploadImageAsync(700);
await UploadImageAsync(460);
await UploadImageAsync(300);
await UploadImageAsync(240);
var imageSize = new ImagemapSize(1024, (int)(1040 * (double)image.Height / image.Width));
var areaWidth = imageSize.Width / 2;
var areaHeight = imageSize.Height / 2;
var imagemapMessage = new ImagemapMessage(uri.ToString().Replace("/1040", ""),
"Sample Imagemap",
imageSize,
new IImagemapAction[] {
new MessageImagemapAction(new ImagemapArea(0, 0, areaWidth, areaHeight), "Area Top-Left"),
new MessageImagemapAction(new ImagemapArea(areaWidth, 0, areaWidth, areaHeight), "Area Top-Right"),
new MessageImagemapAction(new ImagemapArea(0, areaHeight, areaWidth, areaHeight), "Area Bottom-Left"),
new MessageImagemapAction(new ImagemapArea(areaWidth, areaHeight, areaWidth, areaHeight), "Area Bottom-Right"),
});
await MessagingClient.ReplyMessageAsync(replyToken, new[] { imagemapMessage });
async Task <Uri> UploadImageAsync(int baseSize)
{
var img = image.GetThumbnailImage(baseSize, image.Height * baseSize / image.Width, () => false, IntPtr.Zero);
return(await BlobStorage.UploadImageAsync(img, blobDirectoryName + "/" + messageId, baseSize.ToString()));
}
}
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 });
}
}
