wrm.libsass.Lookup Maven / Gradle / Ivy

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Libsass plugin for maven

There is a newer version: 0.3.1

package wrm.libsass;

import io.bit3.jsass.importer.Import;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Optional;
import java.util.Scanner;

@FunctionalInterface
interface Lookup {

  Optional run();

  class Result {

    private final String absoluteUri;
    private final URL url;

    private Result(String absoluteUri, URL url) {
      this.absoluteUri = absoluteUri;
      this.url = url;
    }

    static Result of(String absoluteUri, URL url) {
      return new Result(absoluteUri, url);
    }

    static Result of(File file) {
      try {
        String absoluteUri = file.getPath();
        URL url = file.toURI().toURL();
        return new Result(absoluteUri, url);
      } catch (MalformedURLException e) {
        throw new RuntimeException(e);
      }
    }

    Import buildImport(String importUri) {
      try {
        String contents = read(url);
        return new Import(importUri, absoluteUri, contents);
      } catch (URISyntaxException e) {
        throw new RuntimeException(e);
      }
    }

    private static String read(URL url) {
      try (Scanner scanner = new Scanner(url.openStream(), StandardCharsets.UTF_8.name())) {
        return scanner.useDelimiter("\\A").next();
      } catch (IOException e) {
        throw new RuntimeException("Cannot read the url: " + url, e);
      }
    }
  }
}