com.netflix.spinnaker.clouddriver.artifacts.helm.IndexParser.java Source code

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Here is the source code for com.netflix.spinnaker.clouddriver.artifacts.helm.IndexParser.java

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/*
 * Copyright 2018 Mirantis, Inc.
 *
 * 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 com.netflix.spinnaker.clouddriver.artifacts.helm;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Data
public class IndexParser {
    private String repository;

    public IndexParser(String repository) {
        this.repository = repository;
    }

    public String indexPath() {
        return repository + "/index.yaml";
    }

    public List<String> findNames(InputStream in) throws IOException {
        IndexConfig indexConfig = buildIndexConfig(in);
        return new ArrayList<>(indexConfig.getEntries().keySet());
    }

    public List<String> findVersions(InputStream in, String name) throws IOException {
        if (name == null || name.isEmpty()) {
            throw new IllegalArgumentException("Artifact name field should not be empty");
        }
        List<EntryConfig> configs = buildEntryConfigsByName(buildIndexConfig(in), name);
        List<String> versions = new ArrayList<>();
        configs.forEach(e -> versions.add(e.getVersion()));
        return versions;
    }

    public List<String> findUrls(InputStream in, String name, String version) throws IOException {
        if (name == null || name.isEmpty()) {
            throw new IllegalArgumentException("Artifact name field should not be empty");
        }
        List<EntryConfig> configs = buildEntryConfigsByName(buildIndexConfig(in), name);
        String validVersion = StringUtils.isBlank(version) ? findLatestVersion(configs) : version;
        return resolveReferenceUrls(findUrlsByVersion(configs, validVersion));

    }

    private List<String> resolveReferenceUrls(List<String> urls) {
        return urls.stream().map(this::resolveReferenceUrl).collect(Collectors.toList());
    }

    private String resolveReferenceUrl(String ref) {
        String resolvedRef = ref;
        String base = repository;
        if (!base.endsWith("/")) {
            base = base.concat("/");
        }
        try {
            URL baseUrl = new URL(base);
            URL resolvedUrl = new URL(baseUrl, ref);
            resolvedRef = resolvedUrl.toExternalForm();
        } catch (MalformedURLException e) {
            log.error("Failed to resolve reference url:" + ref, e);
        }
        return resolvedRef;
    }

    private List<String> findUrlsByVersion(List<EntryConfig> configs, String version) {
        List<String> urls = new ArrayList<>();
        configs.forEach(e -> {
            if (e.getVersion().equals(version)) {
                urls.addAll(e.getUrls());
            }
        });
        if (urls.isEmpty()) {
            throw new IllegalArgumentException("Could not find correct entry with artifact version " + version);
        }
        return urls;
    }

    private String findLatestVersion(List<EntryConfig> configs) {
        return configs.stream().max(Comparator.comparing(EntryConfig::getVersion)).get().getVersion();
    }

    private IndexConfig buildIndexConfig(InputStream in) throws IOException {
        ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
        IndexConfig indexConfig;
        try {
            indexConfig = mapper.readValue(in, IndexConfig.class);
        } catch (IOException e) {
            throw new IOException("Invalid index.yaml file in repository " + repository);
        }
        return indexConfig;
    }

    private List<EntryConfig> buildEntryConfigsByName(IndexConfig indexConfig, String name) {
        List<EntryConfig> configs = indexConfig.getEntries().get(name);
        if (configs == null || configs.isEmpty()) {
            throw new IllegalArgumentException("Could not find correct entry with artifact name " + name);
        }
        return configs;
    }

}

@Data
@JsonIgnoreProperties(ignoreUnknown = true)
class IndexConfig {
    private Map<String, List<EntryConfig>> entries;
}

@Data
@JsonIgnoreProperties(ignoreUnknown = true)
class EntryConfig {
    private String name;
    private String version;
    private List<String> urls;
}