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Framework for running JUnit Tests as a Continous Service (QoS)

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package io.split.qos.server.integrations.slack.commandintegration;

import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
import com.ullink.slack.simpleslackapi.events.SlackMessagePosted;
import io.split.qos.server.integrations.slack.SlackCommon;
import io.split.qos.server.modules.QOSServerModule;

import java.util.List;
import java.util.Optional;

@Singleton
public class SlackCommandGetter {

    private final SlackCommon slackCommon;
    private final String serverName;

    @Inject
    public SlackCommandGetter(
            SlackCommon slackCommon,
            @Named(QOSServerModule.QOS_SERVER_NAME) String serverName) {
        this.slackCommon = Preconditions.checkNotNull(slackCommon);
        this.serverName = Preconditions.checkNotNull(serverName);
    }

    public Optional get(SlackMessagePosted message) {
        String commandWithArgs = stripBotId(slackCommon, message);
        List all = Lists.newArrayList(commandWithArgs.split(" "));
        if (all.isEmpty()) {
            return Optional.empty();
        }
        Optional serverNameOptional = Optional.empty();
        if (all.get(0).equalsIgnoreCase(serverName)) {
            serverNameOptional.of(all.remove(0));
        }
        if (all.isEmpty()) {
            return Optional.empty();
        }


        return Optional.of(new SlackCommand(serverNameOptional, all.remove(0), all));
    }

    private String stripBotId(SlackCommon slackCommon, SlackMessagePosted message) {
        return message
                .getMessageContent()
                .trim()
                .replaceFirst(String.format("<@%s>", slackCommon.botId()), "")
                .replaceFirst(":", "")
                .trim();
    }
}