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quill-cassandra

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package io.getquill

import io.getquill.Udt
import io.getquill.context.cassandra.UdtMetaDslMacro

import scala.language.experimental.macros

/**
 * Creates udt meta to override udt name / keyspace and rename columns
 *
 * @param path    - either `udt_name` or `keyspace.udt_name`
 * @param columns - columns to rename
 * @return udt meta
 */
inline def udtMeta[T <: Udt](inline path: String, inline columns: (T => (Any, String))*): UdtMeta[T] = ${UdtMetaDslMacro[T]('path, 'columns)}

trait UdtMeta[T <: Udt] {
  def keyspace: Option[String]
  def name: String
  def alias(col: String): Option[String]
}

object UdtMeta {
  import scala.quoted.*
  def build[T <: Udt: Type](using Quotes): Expr[UdtMeta[T]] = {
    import quotes.reflect.*
    if (TypeRepr.of[T] =:= TypeRepr.of[Udt])
      // TODO quill.trace.types 'summoning' level should enable this
      //println("Cannot derive schema for the base Udt (print the stack trace too)")
      '{ ??? }
    else
      Expr.summon[UdtMeta[T]] match {
        // if there is an implicit meta
        case Some(meta) => meta
        // def apply[T <: Udt: Type](path: Expr[String], columns: Expr[Seq[T => (Any, String)]])(using Quotes): Expr[UdtMeta[T]] = {
        case None =>
          val typeName = TypeRepr.of[T].widen.typeSymbol.name
          // TODO quill.trace.types 'summoning' level should enable this
          //println(s"Dsl not found. Making one with the type name: ${typeName}")
          UdtMetaDslMacro[T](Expr(typeName), Expr.ofList(Seq()))
      }
  }
} // end UdtMeta