/// <summary>
/// Create a patch to update an old instance to this state
/// </summary>
/// <param name="old">Old object state</param>
/// <returns>Differences between this and other or null if they are equal</returns>
internal object MakePatch(ModelObject old)
{
// Need a valid other instance
if (old == null)
{
throw new ArgumentNullException(nameof(old));
}
// Check the types
Type myType = GetType(), otherType = GetType();
if (myType != otherType)
{
// Types differ. Serialize every property of the other instance
return(old);
}
// Look for differences
Dictionary <string, object> diffs = null;
foreach (KeyValuePair <string, PropertyInfo> jsonProperty in JsonProperties)
{
object oldValue = jsonProperty.Value.GetValue(old), newValue = jsonProperty.Value.GetValue(this);
if (oldValue == null || newValue == null || oldValue.GetType() != newValue.GetType())
{
if (oldValue != newValue)
{
if (diffs == null)
{
diffs = new Dictionary <string, object>();
}
diffs.Add(jsonProperty.Key, newValue);
}
}
else if (jsonProperty.Value.PropertyType.IsSubclassOf(typeof(ModelObject)))
{
object diff = ((ModelObject)newValue).MakePatch((ModelObject)oldValue);
if (diff != null)
{
if (diffs == null)
{
diffs = new Dictionary <string, object>();
}
diffs.Add(jsonProperty.Key, diff);
}
}
else if (ModelCollection.GetItemType(jsonProperty.Value.PropertyType, out Type itemType))
{
object listDiff = ModelCollectionHelper.FindDiffs((IList)oldValue, (IList)newValue, itemType);
if (listDiff != null)
{
if (diffs == null)
{
diffs = new Dictionary <string, object>();
}
diffs.Add(jsonProperty.Key, listDiff);
}
}
else if (!newValue.Equals(oldValue))
{
if (diffs == null)
{
diffs = new Dictionary <string, object>();
}
diffs.Add(jsonProperty.Key, newValue);
}
}
return(diffs);
}
/// <summary>
/// Create a UTF8-encoded JSON patch to bring an old instance to this state
/// </summary>
/// <param name="old">Old object state</param>
/// <returns>JSON patch</returns>
public byte[] MakeUtf8Patch(ModelObject old)
{
object diffs = MakePatch(old);
return(JsonSerializer.SerializeToUtf8Bytes(diffs, Utility.JsonHelper.DefaultJsonOptions));
}
/// <summary>
/// Create a string-encoded JSON patch to bring an old instance to this state
/// </summary>
/// <param name="old">Old object state</param>
/// <returns>JSON patch</returns>
public string MakeStringPatch(ModelObject old)
{
object diffs = MakePatch(old);
return(JsonSerializer.Serialize(diffs, Utility.JsonHelper.DefaultJsonOptions));
}
/// <summary>
/// Update this instance from a given JSON element
/// </summary>
/// <param name="jsonElement">Element to update this intance from</param>
/// <param name="ignoreSbcProperties">Whether SBC properties are ignored</param>
/// <returns>Updated instance</returns>
/// <exception cref="JsonException">Failed to deserialize data</exception>
internal virtual ModelObject UpdateFromJson(JsonElement jsonElement, bool ignoreSbcProperties)
{
foreach (JsonProperty jsonProperty in jsonElement.EnumerateObject())
{
if (JsonProperties.TryGetValue(jsonProperty.Name, out PropertyInfo property))
{
if (ignoreSbcProperties && Attribute.IsDefined(property, typeof(LinuxPropertyAttribute)))
{
// Skip this field if it must not be updated
continue;
}
if (property.PropertyType.IsSubclassOf(typeof(ModelObject)))
{
ModelObject modelObject = (ModelObject)property.GetValue(this);
if (jsonProperty.Value.ValueKind == JsonValueKind.Null)
{
if (modelObject != null)
{
if (property.SetMethod != null)
{
property.SetValue(this, null);
}
#if VERIFY_OBJECT_MODEL
else
{
Console.WriteLine("[warn] Tried to set unsettable property {0} to null", jsonProperty.Name);
}
#endif
}
}
else if (modelObject == null)
{
modelObject = (ModelObject)Activator.CreateInstance(property.PropertyType);
modelObject = modelObject.UpdateFromJson(jsonProperty.Value, ignoreSbcProperties);
if (property.SetMethod != null)
{
property.SetValue(this, modelObject);
}
#if VERIFY_OBJECT_MODEL
else
{
Console.WriteLine("[warn] Tried to assign unsettable property {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
}
#endif
}
else
{
ModelObject updatedInstance = modelObject.UpdateFromJson(jsonProperty.Value, ignoreSbcProperties);
if (updatedInstance != modelObject)
{
if (property.SetMethod != null)
{
property.SetValue(this, updatedInstance);
}
#if VERIFY_OBJECT_MODEL
else
{
Console.WriteLine("[warn] Tried to assign unsettable property {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
}
#endif
}
}
}
else if (ModelCollection.GetItemType(property.PropertyType, out Type itemType))
{
IList modelCollection = (IList)property.GetValue(this);
if (ModelGrowingCollection.TypeMatches(property.PropertyType))
{
ModelGrowingCollectionHelper.UpdateFromJson(modelCollection, itemType, jsonProperty.Value, ignoreSbcProperties);
}
else
{
ModelCollectionHelper.UpdateFromJson(modelCollection, itemType, jsonProperty.Value, ignoreSbcProperties);
}
}
else if (property.PropertyType == typeof(bool) && jsonProperty.Value.ValueKind == JsonValueKind.Number)
{
try
{
if (property.SetMethod != null)
{
property.SetValue(this, Convert.ToBoolean(jsonProperty.Value.GetInt32()));
#if VERIFY_OBJECT_MODEL
Console.WriteLine("[warn] Updating bool value from number {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
#endif
}
#if VERIFY_OBJECT_MODEL
else
{
Console.WriteLine("[warn] Tried to assign unsettable property {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
}
#endif
}
catch (FormatException e)
{
throw new JsonException($"Failed to deserialize property [{GetType().Name}].{property.Name} (type bool) from JSON {jsonProperty.Value.GetRawText()}", e);
}
}
else
{
try
{
object newValue = JsonSerializer.Deserialize(jsonProperty.Value.GetRawText(), property.PropertyType);
if (property.SetMethod != null)
{
property.SetValue(this, newValue);
}
#if VERIFY_OBJECT_MODEL
else
{
Console.WriteLine("[warn] Tried to assign unsettable property {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
}
#endif
}
catch (JsonException e)
{
throw new JsonException($"Failed to deserialize property [{GetType().Name}].{property.Name} (type {property.PropertyType.Name}) from JSON {jsonProperty.Value.GetRawText()}", e);
}
}
}
#if VERIFY_OBJECT_MODEL
else if (jsonProperty.Name != "seqs")
{
Console.WriteLine("[warn] Missing property: {0} = {1}", jsonProperty.Name, jsonProperty.Value.GetRawText());
}
#endif
}
return(this);
}
