/// <summary>
/// Builds a url to a contentful image using the specified properties.
/// </summary>
/// <returns>The url.</returns>
public async Task <string> BuildUrl()
{
if (Asset != null)
{
Url = Asset.File?.Url;
if (string.IsNullOrEmpty(Url))
{
AssetId = Asset.SystemProperties?.Id;
}
}
if (string.IsNullOrEmpty(Url))
{
var asset = await _client.GetAssetAsync(AssetId, "");
Url = asset.File.Url;
}
var queryBuilder = new ImageUrlBuilder();
if (Width > 0)
{
queryBuilder.SetWidth(Width);
}
if (Height > 0)
{
queryBuilder.SetHeight(Height);
}
if (JpgQuality.HasValue)
{
queryBuilder.SetJpgQuality(JpgQuality.Value);
}
if (CornerRadius.HasValue)
{
queryBuilder.SetCornerRadius(CornerRadius.Value);
}
if (!string.IsNullOrEmpty(BackgroundColor))
{
queryBuilder.SetBackgroundColor(BackgroundColor);
}
queryBuilder.SetFocusArea(FocusArea);
queryBuilder.SetResizingBehaviour(ResizeBehaviour);
queryBuilder.SetFormat(Format);
if (ProgressiveJpg)
{
queryBuilder.UseProgressiveJpg();
}
return($"{Url}{queryBuilder.Build()}");
}
/// <summary>
/// Executes the taghelper.
/// </summary>
/// <param name="context"></param>
/// <param name="output"></param>
/// <returns></returns>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
if (string.IsNullOrEmpty(Url))
{
var asset = await _client.GetAssetAsync(AssetId, "");
Url = asset.File.Url;
}
var queryBuilder = new ImageUrlBuilder();
if (Width > 0)
{
queryBuilder.SetWidth(Width);
}
if (Height > 0)
{
queryBuilder.SetHeight(Height);
}
if (JpgQuality.HasValue)
{
queryBuilder.SetJpgQuality(JpgQuality.Value);
}
if (CornerRadius.HasValue)
{
queryBuilder.SetCornerRadius(CornerRadius.Value);
}
if (!string.IsNullOrEmpty(BackgroundColor))
{
queryBuilder.SetBackgroundColor(BackgroundColor);
}
queryBuilder.SetFocusArea(FocusArea);
queryBuilder.SetResizingBehaviour(ResizeBehaviour);
queryBuilder.SetFormat(Format);
if (ProgressiveJpg)
{
queryBuilder.UseProgressiveJpg();
}
output.TagName = "img";
output.Attributes.Add("src", Url + queryBuilder.Build());
}
/// <summary>
/// Executes the taghelper.
/// </summary>
/// <param name="context"></param>
/// <param name="output"></param>
/// <returns></returns>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
if (string.IsNullOrEmpty(AssetId))
{
return;
}
var queryBuilder = QueryBuilder <Asset> .New;
if (!string.IsNullOrEmpty(Locale))
{
queryBuilder = queryBuilder.LocaleIs(Locale);
}
var asset = await _client.GetAssetAsync(AssetId, queryBuilder);
output.Attributes.RemoveAll("asset-id");
output.Attributes.RemoveAll("locale");
output.Attributes.SetAttribute("href", asset.File.Url);
}
