ForumTopicEntityProviderImpl.java

package org.sakaiproject.component.app.messageforums.entity;

import java.text.DateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.sakaiproject.api.app.messageforums.DiscussionForum;
import org.sakaiproject.api.app.messageforums.Topic;
import org.sakaiproject.api.app.messageforums.entity.ForumTopicEntityProvider;
import org.sakaiproject.api.app.messageforums.entity.ForumMessageEntityProvider;
import org.sakaiproject.api.app.messageforums.ui.DiscussionForumManager;
import org.sakaiproject.entitybroker.entityprovider.CoreEntityProvider;
import org.sakaiproject.entitybroker.entityprovider.capabilities.AutoRegisterEntityProvider;
import org.sakaiproject.entitybroker.entityprovider.capabilities.PropertyProvideable;

public class ForumTopicEntityProviderImpl implements ForumTopicEntityProvider,
    AutoRegisterEntityProvider, PropertyProvideable {

  private DiscussionForumManager forumManager;

  public String getEntityPrefix() {
    return ENTITY_PREFIX;
  }

  public boolean entityExists(String id) {
    Topic topic = null;
    try {
      topic = forumManager.getTopicById(Long.valueOf(id));
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    return (topic != null);
  }

  public List<String> findEntityRefs(String[] prefixes, String[] name, String[] searchValue,
      boolean exactMatch) {
    List<String> rv = new ArrayList<String>();

    String forumId = null;
    String userId = null;
    String siteId = null;

    if (ENTITY_PREFIX.equals(prefixes[0])) {

      for (int i = 0; i < name.length; i++) {
        if ("context".equalsIgnoreCase(name[i]) || "site".equalsIgnoreCase(name[i]))
          siteId = searchValue[i];
        else if ("user".equalsIgnoreCase(name[i]) || "userId".equalsIgnoreCase(name[i]))
          userId = searchValue[i];
        else if ("parentReference".equalsIgnoreCase(name[i])) {
          String[] parts = searchValue[i].split("/");
          forumId = parts[parts.length - 1];
        }
      }
      String siteRef = siteId;
      if(siteRef != null && !siteRef.startsWith("/site/")){
    	  siteRef = "/site/" + siteRef;
      }

      // TODO: need a way to generate the url with out having siteId in search
      if (forumId != null && userId != null) {
        DiscussionForum forum = forumManager.getForumByIdWithTopics(Long.valueOf(forumId));
        List<Topic> topics = forum.getTopics();
        for (int i = 0; i < topics.size(); i++) {
          // TODO: authz is way too basic, someone more hip to message center please improve...
          //This should also allow people with read access to an item to link to it
          if (forumManager.isInstructor(userId, siteRef)
              || userId.equals(topics.get(i).getCreatedBy()))
            rv.add("/" + ENTITY_PREFIX + "/" + topics.get(i).getId().toString());
        }
      }
      else if (siteId != null && userId != null) {
        List<DiscussionForum> forums = forumManager.getDiscussionForumsByContextId(siteId);
        for (int i = 0; i < forums.size(); i++) {
          List<Topic> topics = forums.get(i).getTopics();
          for (int j = 0; j < topics.size(); j++) {
            // TODO: authz is way too basic, someone more hip to message center please improve...
            //This should also allow people with read access to an item to link to it
            if (forumManager.isInstructor(userId, siteRef)
                || userId.equals(topics.get(j).getCreatedBy()))
              rv.add("/" + ENTITY_PREFIX + "/" + topics.get(j).getId().toString());
          }
        }
      }
    }

    return rv;
  }

  public Map<String, String> getProperties(String reference) {
    Map<String, String> props = new HashMap<String, String>();
    Topic topic =
      forumManager.getTopicById(Long.valueOf(reference.substring(reference.lastIndexOf("/") + 1)));

    props.put("title", topic.getTitle());
    props.put("author", topic.getCreatedBy());
    if (topic.getCreated() != null)
      props.put("date", DateFormat.getInstance().format(topic.getCreated()));
    if (topic.getModified() != null) {
      props.put("modified_by", topic.getModifiedBy());
      props.put("modified_date", DateFormat.getInstance().format(topic.getModified()));
    }
    props.put("short_description", topic.getShortDescription());
    props.put("description", topic.getExtendedDescription());
    if (topic.getModerated() != null)
      props.put("moderated", topic.getModerated().toString());
    props.put("child_provider", ForumMessageEntityProvider.ENTITY_PREFIX);

    return props;
  }

  public String getPropertyValue(String reference, String name) {
    // TODO: don't be so lazy, just get what we need...
    Map<String, String> props = getProperties(reference);
    return props.get(name);
  }

  public void setPropertyValue(String reference, String name, String value) {
    // This does nothing for now... we could all the setting of many published assessment properties
    // here though... if you're feeling jumpy feel free.
  }

  public void setForumManager(DiscussionForumManager forumManager) {
    this.forumManager = forumManager;
  }
}