How to implement a new Condition in Bitbucket?

[Michael Smith]

My problem really is not around creating the condition so much as how to assess the Settings in a Repo.  So I want to know if a merge check is Enabled or Disabled, and add a banner if it is Enabled.  You will notice I temporarily added code to see what context I had, and how they looked.

I received the following (I deleted some text):

2019-06-12 10:47:14,734 WARN Item : request Object : org.apache.catalina.connector.RequestFacade@4cc9f5fb
2019-06-12 10:47:14,734 WARN Item : principal Object : InternalNormalUser{id=651, username=jdoe}
2019-06-12 10:47:14,735 WARN Item : repository Object : NG/my-repo[228]
2019-06-12 10:47:14,735 WARN 3 Entries found in context!

So great news, I got a repository Object.  Wait how do I get it settings?  This is where I am stuck.

atlassian-plugin.xml

<web-panel name="My Panel" key="my-banner-panel" location="bitbucket.web.repository.banner" weight="2000">
    <resource name="view" type="static"><![CDATA[<div class="aui-message">
            <p class="title">
                <strong>REPO FROZEN</strong>
            </p>
            <p>An Administrator has currently FROZEN this repository.</p>
        </div>]]>
    </resource>
</web-panel>

IsMergeCheckEnabledCondition.java

public class IsMergeCheckEnabledCondition implements Condition {

    private static final Logger log = LogManager.getLogger("com.atlassian.bitbucket");

    public static final String MERGE_CHECK = "mergeCheck";

    private String mergeCheckName;

    IsMergeCheckEnabledCondition()
    {
        ; //this.repoService = repositoryService;
    }

    @Override
    public void init(Map<String, String> params)
    {
        mergeCheckName = params.get(MERGE_CHECK);
    }

    @Nonnull
    @Override
    public boolean shouldDisplay(Map<String, Object> context)
    {
        int count = 0;
        for (Map.Entry<String, Object> entry : context.entrySet())
        {
            count++;
            log.warn("Item : " + entry.getKey() + " Object : " + entry.getValue());
        }
        log.warn(count + " Entries found in context!");

        return true;
    }
}

[Michael Smith · Accepted solution]

Well I figured everything out, and here is what I ended up with.

atlassian-plugin.xml

<atlassian-plugin key="${atlassian.plugin.key}" name="${project.name}" plugins-version="2">
    <plugin-info>
        <description>${project.description}</description>
        <version>${project.version}</version>
        <vendor name="${project.organization.name}" url="${project.organization.url}" />
        <param name="plugin-icon">images/pluginIcon.png</param>
        <param name="plugin-logo">images/pluginLogo.png</param>
    </plugin-info>

    <web-panel name="Frozen Panel" key="repo-frozen-banner-panel" location="bitbucket.web.repository.banner" weight="2000">
        <condition class="com.myc.bitbucket.freeze.repo.IsMergeCheckEnabledCondition">
            <param name="mergeCheck">${atlassian.plugin.key}:freezeRepo</param>
        </condition>
        <resource name="view" type="static"><![CDATA[<div class="aui-message">
                <p class="title">
                    <strong>REPO FROZEN</strong>
                </p>
                <p>An Administrator has currently FROZEN this repository.</p>
            </div>]]>
        </resource>
    </web-panel>

    <!-- add our i18n resource -->
    <resource type="i18n" name="i18n" location="FreezeRepo"/>
    
    <repository-merge-check key="freezeRepo" class="bean:FreezeRepo" name="Freeze Repo"/>
</atlassian-plugin>

IsMergeCheckEnabledCondition.java

package com.myc.bitbucket.freeze.repo;

import java.util.Map;
import com.atlassian.bitbucket.hook.repository.RepositoryHook;
import com.atlassian.bitbucket.hook.repository.RepositoryHookService;
import com.atlassian.bitbucket.repository.Repository;
import com.atlassian.bitbucket.scope.RepositoryScope;

import com.atlassian.plugin.spring.scanner.annotation.imports.ComponentImport;
import com.atlassian.plugin.web.Condition;

import org.springframework.beans.factory.annotation.Autowired;

import javax.annotation.Nonnull;

public class IsMergeCheckEnabledCondition implements Condition {

    public static final String MERGE_CHECK = "mergeCheck";
    public static final String REPOSITORY = "repository";

    RepositoryHookService repositoryHookService;
    private String mergeCheckName;

    @Autowired
    public IsMergeCheckEnabledCondition(@ComponentImport RepositoryHookService repositoryHookService)
    {
        this.repositoryHookService = repositoryHookService;
    }

    @Override
    public void init(Map<String, String> params)
    {
        mergeCheckName = params.get(MERGE_CHECK);
    }

    @Nonnull
    @Override
    public boolean shouldDisplay(Map<String, Object> context)
    {
        Repository repository = (Repository) context.get(REPOSITORY);
        RepositoryScope repositoryScope = new RepositoryScope(repository);
        RepositoryHook repositoryHook = repositoryHookService.getByKey(repositoryScope, mergeCheckName);

        return repositoryHook.isEnabled();
    }
}

If your interested in Freeze Repo it is rather simplistic, but here you go.

FreezeRepo.java

package com.myc.bitbucket.freeze.repo;

import java.util.Iterator;
import java.util.Set;
import com.atlassian.bitbucket.hook.repository.*;
import com.atlassian.bitbucket.pull.*;
import org.springframework.stereotype.Component;


import javax.annotation.Nonnull;

@Component("FreezeRepo")
public class FreezeRepo implements RepositoryMergeCheck {

    @Nonnull
    @Override
    public RepositoryHookResult preUpdate(@Nonnull PreRepositoryHookContext context, @Nonnull PullRequestMergeHookRequest request)
    {
        return RepositoryHookResult.rejected("Not allowed to merge when the repo is \"FROZEN\"!", "This repository will not allow merging when it is in a \"FROZEN\" state.");
    }
}

Most likely it will be modified later to allow "Privileged" people to merge like the IsAdmin MergeCheck that Atlassian Provides Plugin detail for.