How to make a plugin like the SideBar plugin, but without having the user entering the name and URL of the links

[maxitrompe]

Hello, I am trying to create a plugin on Jenkins that consists in displaying
a link on the left sidebar of every job, which redirects the user to a new
page. 
To start implementing my plugin, I downloaded the 
https://wiki.jenkins-ci.org/display/JENKINS/Sidebar-Link+Plugin SideBar
Plugin , only this plugin displays a link on the side that is defined by the
user in the configuration page of the jobs. 
The class that displays it is the following :

    package hudson.plugins.sidebar_link;

    import hudson.Extension;
    import hudson.model.*;
    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.List;
    import net.sf.json.JSONObject;
    import org.kohsuke.stapler.DataBoundConstructor;
    import org.kohsuke.stapler.StaplerRequest;
    
    
    public class ProjectLinks extends JobProperty<AbstractProject&lt;?,?>>
    {
        private List<ActionClass> links = new ArrayList<ActionClass>();
        
    @DataBoundConstructor
    public ProjectLinks(List<ActionClass> links)
    {
        this.links = links;
    }
    
    public List<ActionClass> getLinks()
    {
        return links;
    }
    
    @Override
    public Collection<? extends Action> getJobActions(AbstractProject<?,?>
job)
    {
        return links;
    }
    
    
    @Extension
    public static class DescriptorImpl extends JobPropertyDescriptor
    {

        @Override
        public String getDisplayName()
        {
            return "Sidebar Links";
        }
        
        @Override
        public ProjectLinks newInstance(StaplerRequest req, JSONObject
formData) throws Descriptor.FormException
        {
            return formData.has("sidebar-links")
                    ? req.bindJSON(ProjectLinks.class,
formData.getJSONObject("sidebar-links"))
                    : null;
            }
        }
    }


The last function implemented here takes parameters entered by the user,
sent via the jelly file coresponding:

    <?jelly escape-by-default='true'?>
    <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler"
xmlns:l="/lib/layout" xmlns:f="/lib/form">
      
      
      <f:repeatable var="link" items="${attrs.links}" name="links"
add="${%Add Link}">
        <table class="sidebar_link">
          <f:entry title="${%Link URL}"
help="/plugin/sidebar-link/help-url.html">
            <f:textbox name="urlName" value="${link.urlName}"/>
          </f:entry>
          <f:entry title="${%Link Text}">
            <f:textbox name="displayName" value="${link.displayName}"/>
          </f:entry>
          <f:entry title="${%Link Icon}"
help="/plugin/sidebar-link/help-icon.html">
            <f:textbox name="iconFileName" value="${link.iconFileName}"/>
          </f:entry>
          <f:entry><f:repeatableDeleteButton/></f:entry>
        </table>
      </f:repeatable>
    </j:jelly>

Does anyone knows how to make the same plugin, but without having the user
entering the name of the link and its URL, which I think also means without
a jelly file. I want the user to have a link on the side of every job
existing, where I can display information about the job in a new page.

I have been looking over the net for the past few days and have found
absolutely nothing.

If I wasn't clear enough, I apologize, I will give specification if needed.

Thank you in advance.



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