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/*
* SPDX-FileCopyrightText: 2024 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.library;
import org.eclipse.emf.common.util.URI;
import org.eclipse.xtext.naming.QualifiedName;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
public final class PathLibrary implements RefineryLibrary {
@Override
public Optional<URI> resolveQualifiedName(QualifiedName qualifiedName, List<Path> libraryPaths) {
if (libraryPaths.isEmpty()) {
return Optional.empty();
}
if (qualifiedName.getSegmentCount() == 0) {
return Optional.empty();
}
var relativePath = qualifiedNameToRelativePath(qualifiedName);
for (var library : libraryPaths) {
var absoluteResolvedPath = library.resolve(relativePath).toAbsolutePath().normalize();
if (absoluteResolvedPath.startsWith(library) && Files.exists(absoluteResolvedPath)) {
var uri = URI.createFileURI(absoluteResolvedPath.toString());
return Optional.of(uri);
}
}
return Optional.empty();
}
private static Path qualifiedNameToRelativePath(QualifiedName qualifiedName) {
int segmentCount = qualifiedName.getSegmentCount();
String first = null;
var rest = new String[segmentCount - 1];
for (var i = 0; i < segmentCount; i++) {
var segment = qualifiedName.getSegment(i);
if (i == segmentCount - 1) {
segment = segment + RefineryLibrary.FILE_NAME_SUFFIX;
}
if (i == 0) {
first = segment;
} else {
rest[i - 1] = segment;
}
}
if (first == null) {
throw new AssertionError("Expected qualified name to have non-null segments");
}
return Path.of(first, rest);
}
@Override
public Optional<QualifiedName> getQualifiedName(URI uri, List<Path> libraryPaths) {
if (libraryPaths.isEmpty()) {
return Optional.empty();
}
if (!uri.isFile() || !uri.hasAbsolutePath()) {
return Optional.empty();
}
var path = Path.of(uri.toFileString());
for (var library : libraryPaths) {
if (path.startsWith(library)) {
return getRelativeQualifiedName(library, path);
}
}
return Optional.empty();
}
private static Optional<QualifiedName> getRelativeQualifiedName(Path library, Path path) {
var relativePath = path.relativize(library);
var segments = new ArrayList<String>();
for (Path value : relativePath) {
segments.add(value.toString());
}
int lastIndex = segments.size() - 1;
var lastSegment = segments.get(lastIndex);
if (!lastSegment.endsWith(FILE_NAME_SUFFIX)) {
return Optional.empty();
}
lastSegment = lastSegment.substring(0, lastSegment.length() - RefineryLibrary.FILE_NAME_SUFFIX.length());
segments.set(lastIndex, lastSegment);
return Optional.of(QualifiedName.create(segments));
}
}
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