nl.knaw.huygens.alexandria.dropwizard.cli.commands.DiffCommand.java Source code

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Here is the source code for nl.knaw.huygens.alexandria.dropwizard.cli.commands.DiffCommand.java

Source

package nl.knaw.huygens.alexandria.dropwizard.cli.commands;

/*
 * #%L
 * alexandria-markup-server
 * =======
 * Copyright (C) 2015 - 2018 Huygens ING (KNAW)
 * =======
 * 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.
 * #L%
 */

import io.dropwizard.setup.Bootstrap;
import net.sourceforge.argparse4j.inf.Namespace;
import net.sourceforge.argparse4j.inf.Subparser;
import nl.knaw.huc.di.tag.TAGViews;
import nl.knaw.huc.di.tag.tagml.importer.TAGMLImporter;
import nl.knaw.huygens.alexandria.compare.TAGComparison;
import nl.knaw.huygens.alexandria.dropwizard.cli.AlexandriaCommandException;
import nl.knaw.huygens.alexandria.dropwizard.cli.CLIContext;
import nl.knaw.huygens.alexandria.storage.TAGDocument;
import nl.knaw.huygens.alexandria.storage.TAGStore;
import nl.knaw.huygens.alexandria.view.TAGView;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.charset.StandardCharsets;
import java.util.Optional;

public class DiffCommand extends AlexandriaCommand {

    public DiffCommand() {
        super("diff", "Show the changes made to the file.");
    }

    @Override
    public void configure(Subparser subparser) {
        subparser.addArgument("file")//
                .dest(FILE)//
                .type(String.class)//
                .required(true)//
                .help("The file containing the edited view");
    }

    @Override
    public void run(Bootstrap<?> bootstrap, Namespace namespace) {
        checkDirectoryIsInitialized();
        try (TAGStore store = getTAGStore()) {
            store.runInTransaction(() -> {
                CLIContext context = readContext();

                String filename = namespace.getString(FILE);
                Optional<String> documentName = context.getDocumentName(filename);
                if (documentName.isPresent()) {
                    doDiff(store, context, filename, documentName);
                } else {
                    throw new AlexandriaCommandException("No document registered for " + filename);
                }
            });
        }
    }

    private void doDiff(final TAGStore store, final CLIContext context, final String filename,
            final Optional<String> documentName) {
        Long documentId = getIdForExistingDocument(documentName.get());
        TAGDocument original = store.getDocument(documentId);

        String viewName = context.getActiveView();
        TAGView tagView = MAIN_VIEW.equals(viewName) ? TAGViews.getShowAllMarkupView(store)
                : getExistingView(viewName, store, context);

        File editedFile = workFilePath(filename).toFile();
        try {
            String newTAGML = FileUtils.readFileToString(editedFile, StandardCharsets.UTF_8);
            TAGMLImporter importer = new TAGMLImporter(store);
            TAGDocument edited = importer.importTAGML(newTAGML);

            TAGComparison comparison = new TAGComparison(original, tagView, edited);

            if (MAIN_VIEW.equals(viewName)) {
                System.out.printf("diff for %s:%n", filename);
            } else {
                System.out.printf("diff for %s, using view %s:%n", filename, viewName);
            }
            if (comparison.hasDifferences()) {
                System.out.printf("%s%n", String.join(System.lineSeparator(), comparison.getDiffLines()));
            } else {
                System.out.println("no changes");
            }

        } catch (IOException e) {
            e.printStackTrace();
            throw new UncheckedIOException(e);
        }
    }
}