/// <summary>
/// Open a given lottie file
/// </summary>
/// <param name="fileStream"></param>
/// <returns></returns>
public static async Task <DotLottie> OpenAsync(Stream fileStream)
{
var dotLottie = new DotLottie();
var archive = new ZipArchive(fileStream, ZipArchiveMode.Read, true);
var manifestEntry = archive.GetEntry(Consts.Manifest);
var animationEntries = archive.Entries.Where(x => x.FullName.StartsWith(Consts.Animations));
var imageEntries = archive.Entries.Where(x => x.FullName.StartsWith(Consts.Images));
if (manifestEntry != null)
{
using (var stream = manifestEntry.Open())
{
var manifest = await JsonSerializer.DeserializeAsync <Manifest>(stream, Options.JsonSerializerOptions);
dotLottie.Manifest = manifest;
}
}
//todo: asyncify
ExtractAnimations(dotLottie, animationEntries);
ExtractImages(dotLottie, imageEntries);
return(dotLottie);
}
/// <summary>
/// Open a given lottie file
/// </summary>
/// <param name="fileStream"></param>
/// <returns></returns>
public static DotLottie Open(Stream fileStream)
{
var dotLottie = new DotLottie();
var archive = new ZipArchive(fileStream, ZipArchiveMode.Read, true);
var manifestEntry = archive.GetEntry(Consts.Manifest);
var animationEntries = archive.Entries.Where(x => x.FullName.StartsWith(Consts.Animations));
var imageEntries = archive.Entries.Where(x => x.FullName.StartsWith(Consts.Images));
if (manifestEntry != null)
{
using (var stream = manifestEntry.Open())
using (StreamReader streamReader = new StreamReader(stream))
{
var json = streamReader.ReadToEnd();
var manifest = JsonSerializer.Deserialize <Manifest>(json, Options.JsonSerializerOptions);
dotLottie.Manifest = manifest;
}
}
ExtractAnimations(dotLottie, animationEntries);
ExtractImages(dotLottie, imageEntries);
return(dotLottie);
}
//todo: expose this as a helper method or override for simplicity
public static KeyValuePair <string, string> FirstAnimation(this DotLottie dotLottie)
{
var animationStream = dotLottie.Animations.First();
var animationText = Encoding.UTF8.GetString(animationStream.Value.ToArray());
return(new KeyValuePair <string, string>(animationStream.Key, animationText));
}
public static List <string> Validate(this DotLottie dotLottie)
{
var errors = new List <string>();
//todo: Check
return(errors);
}
private static void ExtractImages(DotLottie dotLottie, IEnumerable <ZipArchiveEntry> imageEntries)
{
foreach (var imageEntry in imageEntries)
{
using (var stream = imageEntry.Open())
{
var ms = new MemoryStream();
stream.CopyTo(ms);
ms.Position = 0;
dotLottie.Images.Add(imageEntry.Name, ms);
}
}
}
private static void ExtractAnimations(DotLottie dotLottie, IEnumerable <ZipArchiveEntry> animationEntries)
{
foreach (var animationEntry in animationEntries)
{
using (var stream = animationEntry.Open())
{
var ms = new MemoryStream();
//todo: just use the stream, don't clone it.
stream.CopyTo(ms);
ms.Position = 0;
dotLottie.Animations.Add(animationEntry.Name, ms);
}
}
}