void ListChildrensItemsAndAssets(IStacParent catalog, Uri baseUri, string prefix = "", int limit = 2)
{
// Get children first (sub catalogs and collections)
foreach (var childLink in catalog.GetChildrenLinks().Concat(catalog.GetItemLinks()))
{
Uri childUri = childLink.Uri;
if (!childUri.IsAbsoluteUri)
{
childUri = new Uri(baseUri, childUri.ToString());
}
IStacObject child = StacConvert.Deserialize <IStacObject>(httpClient.GetStringAsync(childUri).GetAwaiter().GetResult());
Console.Out.WriteLine(prefix + child.Id + ": " + child.Title);
if (child is StacCatalog || child is StacCollection)
{
ListChildrensItemsAndAssets(child as IStacParent, childUri, prefix + " ");
}
if (child is StacItem)
{
foreach (var asset in (child as StacItem).Assets)
{
Console.Out.WriteLine(prefix + asset.Key + ": *[" + asset.Value.MediaType + "] " + asset.Value.Uri);
}
}
}
}
/// <summary>
/// Initialize a new asset from an existing one
/// </summary>
/// <param name="source">asset source to be copied</param>
/// <param name="stacObject">new parent stac object</param>
public StacAsset(StacAsset source, IStacObject stacObject)
{
if (!(stacObject == null || stacObject is StacItem || stacObject is StacCollection))
{
throw new InvalidOperationException("An asset cannot be defined in " + stacObject.GetType().Name);
}
if (source == null)
{
throw new ArgumentNullException("source");
}
base_uri = source.base_uri;
href = source.href;
if (source.Roles != null)
{
Roles = new SortedSet <string>(source.Roles);
}
else
{
Roles = new SortedSet <string>();
}
title = source.title;
type = source.type;
description = source.description;
if (source.properties != null)
{
properties = new Dictionary <string, object>(source.properties);
}
parentStacObject = stacObject;
}
public SchemaBasedStacExtension(Uri jsonSchema,
IStacObject stacObject) : base(jsonSchema.ToString(),
stacObject)
{
Preconditions.CheckNotNull <Uri>(jsonSchema, "jsonSchema");
JsonSchema = jsonSchema;
this.stacObject = stacObject;
}
public ViewStacExtension(IStacObject stacObject) : base(JsonSchemaUrl, stacObject)
{
itemFields = new Dictionary <string, Type>();
itemFields.Add(OffNadirField, typeof(double));
itemFields.Add(IncidenceAngleField, typeof(double));
itemFields.Add(AzimuthField, typeof(double));
itemFields.Add(SunAzimuthField, typeof(double));
itemFields.Add(SunElevationField, typeof(double));
}
public SchemaBasedStacExtension(Uri schemaUri,
StacSchemaResolver stacSchemaResolver,
IStacObject stacObject) : base(schemaUri.ToString(),
stacObject)
{
Preconditions.CheckNotNull <Uri>(schemaUri, "schemaUri");
this.stacObject = stacObject;
JsonSchema = schemaUri;
}
public static string Serialize(IStacObject stacObject, JsonSerializerSettings serializerSettings = null)
{
if (serializerSettings == null)
{
serializerSettings = defaultJsonSerializerSettings;
}
serializerSettings.DateTimeZoneHandling = DateTimeZoneHandling.Utc;
return(JsonConvert.SerializeObject(stacObject, serializerSettings));
}
/// <summary>
/// Initialize a new asset with a Uri
/// </summary>
/// <param name="stacObject">parent stac object</param>
/// <param name="uri">uri to the asset</param>
public StacAsset(IStacObject stacObject, Uri uri) : this()
{
if (!(stacObject == null || stacObject is StacItem || stacObject is StacCollection))
{
throw new InvalidOperationException("An asset cannot be defined in " + stacObject.GetType().Name);
}
parentStacObject = stacObject;
Uri = uri;
}
protected StacNode(IStacObject stacObject, Uri uri = null, ICredentials credentials = null)
{
if (stacObject == null)
{
throw new ArgumentNullException("stacObject");
}
this.stacObject = stacObject;
this.credentials = credentials;
this.uri = uri == null ? new Uri(Id + ".json", UriKind.Relative) : uri;
}
public static SchemaBasedStacExtension Create(string shortcut,
StacSchemaResolver stacSchemaResolver,
IStacObject stacObject)
{
if (StacSchemaResolver.CoreTypes.Contains(shortcut))
{
throw new Exceptions.InvalidStacSchemaException(shortcut + "is not an extension");
}
Uri schema = new Uri($"https://stac-extensions.github.io/{shortcut}/v1.0.0/schema.json");
return(new SchemaBasedStacExtension(schema, stacObject));
}
internal StacObjectLink(IStacObject stacObject, Uri uri)
{
this.stacObject = stacObject;
if (stacObject is StacItem)
{
this.RelationshipType = "item";
}
if (stacObject is StacCatalog || stacObject is StacCollection)
{
this.RelationshipType = "child";
}
Uri = uri;
}
public static async Task <IDictionary <Uri, StacItem> > GetItemsAsync(this IStacObject stacObject, Uri baseUri, StacRouter stacRouter)
{
Dictionary <Uri, StacItem> items = new Dictionary <Uri, StacItem>();
foreach (var itemLink in stacObject.Links.Where(l => !string.IsNullOrEmpty(l.RelationshipType) && l.RelationshipType == "item"))
{
Uri linkUri = itemLink.Uri;
if (!linkUri.IsAbsoluteUri && baseUri.IsAbsoluteUri)
{
linkUri = new Uri(baseUri, itemLink.Uri);
}
items.Add(linkUri, await itemLink.CreateStacObject(baseUri, stacRouter.Credentials) as StacItem);
}
return(items);
}
public static async Task <IDictionary <Uri, IStacCatalog> > GetChildrenAsync(this IStacObject stacObject, Uri baseUri, StacRouter stacRouter)
{
Dictionary <Uri, IStacCatalog> children = new Dictionary <Uri, IStacCatalog>();
foreach (var childLink in stacObject.Links.Where(l => !string.IsNullOrEmpty(l.RelationshipType) && l.RelationshipType == "child"))
{
Uri linkUri = childLink.Uri;
if (!linkUri.IsAbsoluteUri && baseUri.IsAbsoluteUri)
{
linkUri = new Uri(baseUri, childLink.Uri);
}
children.Add(linkUri, await childLink.CreateStacObject(baseUri, stacRouter.Credentials) as IStacCatalog);
}
return(children);
}
public static IDictionary <Uri, IStacCatalog> GetChildren(this IStacObject stacObject, Uri baseUri, StacRouter stacRouter)
{
return(GetChildrenAsync(stacObject, baseUri, stacRouter).GetAwaiter().GetResult());
}
public static void SetProperty(this IStacObject stacObject, string key, object value)
{
stacObject.Properties.SetProperty(key, value);
}
/// <summary>
/// Create a metadata asset
/// </summary>
/// <param name="stacObject">parent stac object</param>
/// <param name="uri">Uri to the metadata</param>
/// <param name="mediaType">media type of the metadata</param>
/// <param name="title">title of the metadata (if any)</param>
/// <returns>A new Asset describing the metadata</returns>
public static StacAsset CreateMetadataAsset(IStacObject stacObject, Uri uri, ContentType mediaType, string title = null)
{
return(new StacAsset(stacObject, uri, new string[] { "metadata" }, title, mediaType));
}
internal VersionStacExtension(IStacObject stacObject) : base(JsonSchemaUrl, stacObject)
{
itemFields = new Dictionary<string, Type>();
itemFields.Add(VersionField, typeof(string));
itemFields.Add(DeprecatedField, typeof(bool));
}
/// <summary>
/// Create a new Virtual Asset from assets defined in an existing stac item
/// </summary>
/// <param name="stacItem">Stac Item to reference the assets from</param>
/// <param name="assetsKey">keys of the assets to be referenced</param>
/// <param name="newStacObject">new stac object container of the virtuals assets. If not specified, the stacItem is used</param>
/// <returns></returns>
public static VirtualAsset Create(StacItem stacItem, IList <string> assetsKey, IStacObject newStacObject = null)
{
IStacObject parentObject = newStacObject == null ? stacItem : newStacObject;
return(new VirtualAsset(parentObject, stacItem.Assets.Select(asset => new Uri(asset.Value.Uri, "#" + asset.Key)).ToList()));
}
/// <summary>
/// Initialize a new asset
/// </summary>
/// <param name="stacObject">parent stac object</param>
/// <param name="uri">uri to the asset</param>
/// <param name="roles">roles of the asset</param>
/// <param name="title">title of the asset</param>
/// <param name="mediaType">media-type of the asset</param>
public StacAsset(IStacObject stacObject, Uri uri, IEnumerable <string> roles, string title, ContentType mediaType) : this(stacObject, uri)
{
Roles = roles == null ? new SortedSet <string>() : new SortedSet <string>(roles.ToList());
Title = title;
MediaType = mediaType;
}
/// <summary>
/// Initialize a new Virtual Asset for a STAC object with an array of items
/// </summary>
/// <returns></returns>
public VirtualAsset(IStacObject stacObject, IList <Uri> uris) : base(stacObject, null)
{
Uris = uris;
}
/// <summary>
/// Create a thumbnail asset
/// </summary>
/// <param name="stacObject">parent stac object</param>
/// <param name="uri">Uri to the thumbnail</param>
/// <param name="mediaType">media type of the thumbnail</param>
/// <param name="title">title of the thumbnail (if any)</param>
/// <returns>A new Asset describing the thumbnail</returns>
public static StacAsset CreateThumbnailAsset(IStacObject stacObject, Uri uri, ContentType mediaType, string title = null)
{
return(new StacAsset(stacObject, uri, new string[] { "thumbnail" }, title, mediaType));
}
public static IDictionary <Uri, StacItem> GetItems(this IStacObject stacObject, Uri baseUri, StacRouter stacRouter)
{
return(GetItemsAsync(stacObject, baseUri, stacRouter).GetAwaiter().GetResult());
}
/// <summary>
/// Create an overview asset
/// </summary>
/// <param name="stacObject">parent stac object</param>
/// <param name="uri">Uri to the overview</param>
/// <param name="mediaType">media type of the overview</param>
/// <param name="title">title of the overview (if any)</param>
/// <returns>A new Asset describing the overview</returns>
public static StacAsset CreateOverviewAsset(IStacObject stacObject, Uri uri, ContentType mediaType, string title = null)
{
return(new StacAsset(stacObject, uri, new string[] { "overview" }, title, mediaType));
}
public static StacLink CreateObjectLink(IStacObject stacObject, Uri uri)
{
return(new StacObjectLink(stacObject, uri));
}
internal VirtualAssetsStacExtension(IStacObject stacObject) : base(JsonSchemaUrl, stacObject)
{
itemFields = new Dictionary <string, Type>();
itemFields.Add(VirtualAssetsField, typeof(VirtualAsset));
}
