Media processing script

This is an example of a Media processing script to be executed every time an asset is processed by the respective worker. It extracts the metadata properties from the context and adds them to the asset.

Script

RequestResponse

using System.Linq;

var masterFileRelation = await Context.File.GetRelationAsync<IChildToManyParentsRelation>("MasterFile");

if (!masterFileRelation.Parents.Any() || !masterFileRelation.Parents.Contains(Context.Asset.Id.Value))
{
  return;
}

string ToCsvValue(object source)
{
  var str = source.ToString();
  if (str.Contains(","))
  {
    return "\"" + str + "\"";
  }
  return str;
}

var headers = string.Join(", ", Context.MetadataProperties.Keys.Select(ToCsvValue));
var values = string.Join(", ", Context.MetadataProperties.Values.Select(ToCsvValue));

var metadataProp = await Context.Asset.GetPropertyAsync<ICultureInsensitiveProperty>("Metadata");
metadataProp.SetValue(headers + "\n" + values);

await MClient.Entities.SaveAsync(Context.Asset);

Script explanation

First, the script includes the libraries to be used in the script.

RequestResponse

using System.Linq;

Then, it gets the MasterFile relation of the asset.

RequestResponse

var masterFileRelation = await Context.File.GetRelationAsync<IChildToManyParentsRelation>("MasterFile");

After that, it checks if the current file is the master file. Only this metadata is to be copied if this is the case.

RequestResponse

if (!masterFileRelation.Parents.Any() || !masterFileRelation.Parents.Contains(Context.Asset.Id.Value))
{
  return;
}

Next, it creates a method that checks whether the property already has commas and escapes them with quotation marks.

RequestResponse

string ToCsvValue(object source)
{
  var str = source.ToString();
  if (str.Contains(","))
  {
    return "\"" + str + "\"";
  }
  return str;
}

The script then converts the metadata headers to csv.

RequestResponse

var headers = string.Join(", ", Context.MetadataProperties.Keys.Select(ToCsvValue));

It also converts the metadata values to csv.

RequestResponse

var values = string.Join(", ", Context.MetadataProperties.Values.Select(ToCsvValue));

The script gets the metadata property field of the asset.

RequestResponse

var metadataProp = await Context.Asset.GetPropertyAsync<ICultureInsensitiveProperty>("Metadata");

Afterwards, it stores the metadata on the asset.

RequestResponse

metadataProp.SetValue(headers + "\n" + values);

At the end, the script saves the asset.

RequestResponse

await MClient.Entities.SaveAsync(Context.Asset);

Setup

Create a string property called Metadata on the M.Asset definition, setting the content type to Multiple lines.
Create, publish, and enable a metadata processing script.

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