geotrellis.server.ogc.wcs.WcsModel.scala Maven / Gradle / Ivy

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GeoTrellis Server is a set of components designed to simplify viewing, processing, and serving raster data from arbitrary sources with an emphasis on doing so in a functional style.

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/*
 * Copyright 2020 Azavea
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package geotrellis.server.ogc.wcs

import geotrellis.server.ogc._
import geotrellis.server.ogc.params.ParamMap
import geotrellis.server.ogc.utils._
import com.azavea.maml.ast.Expression
import cats.Functor
import cats.syntax.functor._
import geotrellis.store.query.RepositoryM
import geotrellis.proj4.CRS

/**
 * This class holds all the information necessary to construct a response to a WCS request
 */
case class WcsModel[F[_]: Functor](
  serviceMetadata: ows.ServiceMetadata,
  sources: RepositoryM[F, List, OgcSource],
  supportedProjections: List[CRS],
  extendedParametersBinding: Option[ParamMap => Option[Expression => Expression]] = None
) {
  def getLayers(p: GetCoverageWcsParams): F[List[OgcLayer]] = {
    val filteredSources = sources.find(p.toQuery)
    filteredSources.map {
      _.map {
        case rs: RasterOgcSource => rs.toLayer(p.crs, None, p.temporalSequence)
        case mas: MapAlgebraSource =>
          val (name, title, algebra, resampleMethod, overviewStrategy) = (mas.name, mas.title, mas.algebra, mas.resampleMethod, mas.overviewStrategy)
          val simpleLayers = mas.sources.map { case (key, rs) =>
            key -> SimpleOgcLayer(name, title, p.crs, rs, None, resampleMethod, overviewStrategy)
          }
          val extendedParameters = extendedParametersBinding.flatMap(_.apply(p.params))
          MapAlgebraOgcLayer(
            name,
            title,
            p.crs,
            simpleLayers,
            algebra.bindExtendedParameters(extendedParameters),
            None,
            resampleMethod,
            overviewStrategy,
            mas.targetCellType
          )
      }
    }
  }
}