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/*
* This file is part of onkostar-plugin-dnpm
*
* Copyright (C) 2023-2026 the original author or authors.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package dev.dnpm.oshelper.atc.services;
import dev.dnpm.oshelper.atc.AgentCode;
import org.jspecify.annotations.NullMarked;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;
import static java.util.stream.Collectors.groupingBy;
/**
* Common interface for agent code services
*
* @author Paul-Christian Volkmer
* @since 2.0.0
*/
public interface AgentCodeService {
/**
* Filters the provided list of AgentCodes to include only the latest available versions
* for each unique code name and, if required, code.
* If the input list is empty or null, an empty list will be returned.
*
* @param agentCodes A list of {@link AgentCode} objects to be filtered. Each object in the list
* should contain information about the agent's code, name, system, and version.
* @param classifier A function that returns a string value to be used as a key for grouping agent codes.
* @return A list of {@link AgentCode} objects representing the latest available versions of unique agent codes.
* If no valid inputs are provided, an empty list is returned.
*/
@NullMarked
static List<AgentCode> latestAgentCodeVersions(List<AgentCode> agentCodes, Function<AgentCode, String> classifier) {
return latestAvailable(agentCodes, classifier);
}
/**
* Function that extracts the name of an {@link AgentCode} object.
* This function is used as a classifier for grouping agent codes by their name.
*/
Function<AgentCode, String> byCodeOnly = AgentCode::getName;
/**
* Function that extracts the name and code of an {@link AgentCode} object.
* This function is used as a classifier for grouping agent codes by their name and code.
*/
Function<AgentCode, String> byNameAndCode = (agentCode ->
String.format("%s_%s", agentCode.getCode(), agentCode.getName())
);
@NullMarked
private static List<AgentCode> latestAvailable(
List<AgentCode> agentCodes,
Function<AgentCode, String> classifier
) {
return agentCodes.stream()
.collect(groupingBy(classifier)).values().stream()
.map(list ->
list.stream()
.sorted(Comparator.comparing(AgentCode::getCode))
.max((ac1, ac2) -> {
if (null == ac1.getVersion()) {
return -1;
} else if (null == ac2.getVersion()) {
return 1;
}
return ac1.getVersion().compareTo(ac2.getVersion());
})
.orElse(null)
)
.filter(Objects::nonNull)
.distinct()
.collect(Collectors.toList());
}
/**
* Queries source for agents with name and code starting with query string.
* If size is zero, all available results will be returned.
*
* @param query The query string
* @param size Maximal amount of responses
* @return A list with agent codes
*/
List<AgentCode> findAgentCodes(String query, int size);
}
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