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modules/client/shared/src/main/scala/com/azavea/stac4s/api/client/utils/ClientCodecs.scala
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| package com.azavea.stac4s.api.client.utils | ||
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| import com.azavea.stac4s.types.TemporalExtent | ||
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| import cats.syntax.apply._ | ||
| import cats.syntax.either._ | ||
| import io.circe.{Decoder, Encoder} | ||
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| import java.time.Instant | ||
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| trait ClientCodecs { | ||
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| // TemporalExtent STAC API compatible serialization | ||
| // Ported from https://github.com/azavea/franklin/ | ||
| private def stringToInstant(s: String): Either[Throwable, Instant] = | ||
| Either.catchNonFatal(Instant.parse(s)) | ||
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| private def temporalExtentToString(te: TemporalExtent): String = | ||
| te.value match { | ||
| case Some(start) :: Some(end) :: _ if start != end => s"${start.toString}/${end.toString}" | ||
| case Some(start) :: Some(end) :: _ if start == end => s"${start.toString}" | ||
| case Some(start) :: None :: _ => s"${start.toString}/.." | ||
| case None :: Some(end) :: _ => s"../${end.toString}" | ||
| } | ||
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| private def temporalExtentFromString(str: String): Either[String, TemporalExtent] = { | ||
| str.split("/").toList match { | ||
| case ".." :: endString :: _ => | ||
| val parsedEnd = stringToInstant(endString) | ||
| parsedEnd match { | ||
| case Left(_) => s"Could not decode instant: $str".asLeft | ||
| case Right(end: Instant) => TemporalExtent(None, end).asRight | ||
| } | ||
| case startString :: ".." :: _ => | ||
| val parsedStart = stringToInstant(startString) | ||
| parsedStart match { | ||
| case Left(_) => s"Could not decode instant: $str".asLeft | ||
| case Right(start: Instant) => TemporalExtent(start, None).asRight | ||
| } | ||
| case startString :: endString :: _ => | ||
| val parsedStart = stringToInstant(startString) | ||
| val parsedEnd = stringToInstant(endString) | ||
| (parsedStart, parsedEnd).tupled match { | ||
| case Left(_) => s"Could not decode instant: $str".asLeft | ||
| case Right((start: Instant, end: Instant)) => TemporalExtent(start, end).asRight | ||
| } | ||
| case _ => | ||
| Either.catchNonFatal(Instant.parse(str)) match { | ||
| case Left(_) => s"Could not decode instant: $str".asLeft | ||
| case Right(t: Instant) => TemporalExtent(t, t).asRight | ||
| } | ||
| } | ||
| } | ||
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| implicit lazy val encoderTemporalExtent: Encoder[TemporalExtent] = | ||
| Encoder.encodeString.contramap[TemporalExtent](temporalExtentToString) | ||
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| implicit lazy val decoderTemporalExtent: Decoder[TemporalExtent] = | ||
| Decoder.decodeString.emap(temporalExtentFromString) | ||
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| } |