ai.starlake.schema.model.TransformInput.scala Maven / Gradle / Ivy

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package ai.starlake.schema.model

import ai.starlake.utils.TransformEngine
import com.fasterxml.jackson.core.JsonParser
import com.fasterxml.jackson.databind.annotation.{JsonDeserialize, JsonSerialize}
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer
import com.fasterxml.jackson.databind.{DeserializationContext, JsonDeserializer}

/** How (the attribute should be transformed at ingestion time ?
  *
  * @param value
  *   algorithm to use : NONE, HIDE, MD5, SHA1, SHA256, SHA512, AES
  */
@JsonSerialize(using = classOf[ToStringSerializer])
@JsonDeserialize(using = classOf[TransformInputDeserializer])
sealed case class TransformInput(value: String, sql: Boolean) {
  override def toString: String = if (sql) s"SQL:$value" else value

  def crypt(
    s: String,
    colMap: Map[String, Option[String]],
    transformAlgo: TransformEngine,
    transformParams: List[String]
  ): String = {
    // val ((privacyAlgo, privacyParams), _) = allPrivacyLevels(value)
    transformAlgo.crypt(s, colMap, transformParams)
  }
}

object TransformInput {

  val None: TransformInput = TransformInput("NONE", false)
}

class TransformInputDeserializer extends JsonDeserializer[TransformInput] {

  override def getNullValue(ctxt: DeserializationContext): TransformInput = TransformInput.None

  override def deserialize(jp: JsonParser, ctx: DeserializationContext): TransformInput = {
    val value = jp.readValueAs[String](classOf[String]).toUpperCase()
    val isSQL =
      if (value.startsWith("SQL:")) {
        true
      } else {
        // the value contains space before the '(' and is not a function
        val parIndex = value.indexOf('(')
        if (parIndex > 0)
          value.substring(0, parIndex).trim.contains(' ')
        else
          value.trim.contains(' ')
      }
    val finalValue = if (isSQL) value.substring("SQL:".length) else value
    TransformInput(
      finalValue,
      isSQL
    )
  }
}