public async Task <(byte[] data, string mimeType)> Render(ImageModel model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
var config = await _configService.GetConfig();
var template = await _configService.GetTemplate(model.ImageId);
var imagePath = _configService.GetImagePath(template);
var fontPath = _configService.GetFontPath(template, config);
var font = new FontCollection().Install(fontPath).CreateFont(10, FontStyle.Regular);
var boxes = model.Boxes.Prepend(template.Watermark ?? config.TemplateDefaults.Watermark).ToList();
var encoder = GetEncoder(template, config);
var mimeType = GetMimeType(template, config);
using (var image = Image.Load(imagePath))
{
DrawTextBoxes(image, font, boxes);
using (var stream = new MemoryStream())
{
image.Save(stream, encoder);
return(stream.ToArray(), mimeType);
}
}
}
public async Task <SlackMessage> RenderPreview(MemeMessage message)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
var template = await _configService.GetTemplate(message.TemplateId, message.UserId);
var templates = await _configService.GetTemplatesForUser(message.UserId);
return(new SlackMessage
{
ResponseType = SlackMessageResponseTypes.Ephemeral,
Text = GetText(message),
Attachments = new[]
{
new SlackMessageAttachment
{
ImageUrl = message.ImageUrl,
Fallback = message.Message,
},
new SlackMessageAttachment
{
Title = "This is a preview of your meme",
Text = "_hint: use a semicolon to separate lines of text_",
Fallback = "Here you would choose to confirm posting your meme",
CallbackId = $"{Constants.CallbackIds.Meme}:{message.Guid}",
Color = "#3AA3E3",
MrkdwnIn = new[] { "text" },
Actions = new ISlackMessageAction []
{
new SlackMessageButton
{
Name = Constants.ActionNames.Cancel,
Text = "Cancel",
},
new SlackMessageSelect
{
Name = Constants.ActionNames.Switch,
Text = "Image",
SelectedOptions = new[]
{
new SlackMessageOption
{
Text = template.Name,
Value = template.Id,
}
},
OptionGroups = new[]
{
new SlackMessageOptionGroup
{
Text = "Change Image",
Options = templates.Select(t => new SlackMessageOption
{
Text = t.Name,
Description = t == template ? "(selected)" : null,
Value = t.Id,
}).ToList()
},
}
},
new SlackMessageButton
{
Name = Constants.ActionNames.Switch,
Text = "Next",
Style = SlackMessageButtonStyles.Default,
Value = templates.GetItemAfter(template).Id,
},
new SlackMessageButton
{
Name = Constants.ActionNames.Edit,
Text = "Edit",
Style = SlackMessageButtonStyles.Default,
},
new SlackMessageButton
{
Name = Constants.ActionNames.Submit,
Text = "Post",
Style = SlackMessageButtonStyles.Primary
},
}
}
}
});
}