✨ Flatten results of VRL scripts

[linkdd]

Decision Record

In FlowG, a log record is a flat map of string -> string. But a VRL script can return more complex/nested values.

In order to properly serialize the result of a VRL script to the format FlowG expects:

• Bytes, Regex, Timestamp, Integer, Float and Boolean are translated to UTF-8 strings
• Null is translated to an empty string
• Object and Array are flattened

For example, the following script:

.foo = 42
.bar.baz = [1, 2, 3, "a"]
.

Would return the following object (given an empty record as input):

{
  "foo": 42,
  "bar": {
    "baz": [1, 2, 3, "a"]
  }
}

Once flattened and with every value serialized to a string:

{
  "foo": "42",
  "bar.baz.0": "1",
  "bar.baz.1": "2",
  "bar.baz.2": "3",
  "bar.baz.3": "a"
}

Changes

• ✨ Flatten the result of a VRL script
• ✅ Add test cases for VRL scripts

License Agreement

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• I accept that this contribution will be released under the terms of the MIT License