CommCareUtil.java

/**
 * 
 */
package org.commcare.android.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Vector;

import org.commcare.android.tasks.LogSubmissionTask;
import org.commcare.dalvik.R;
import org.commcare.dalvik.application.CommCareApplication;
import org.javarosa.core.model.instance.ExternalDataInstance;
import org.javarosa.core.model.instance.FormInstance;
import org.javarosa.core.model.instance.TreeReference;
import org.javarosa.core.services.storage.IStorageUtilityIndexed;
import org.javarosa.core.util.ArrayUtilities;
import org.javarosa.model.xform.DataModelSerializer;
import org.javarosa.xpath.expr.XPathExpression;

import android.content.Context;
import android.content.SharedPreferences;
import android.widget.Toast;

/**
 * Basically Copy+Paste code from CCJ2ME that needs to be unified or re-indexed to somewhere more reasonable.
 * 
 * @author ctsims
 *
 */
public class CommCareUtil {

    public static FormInstance loadFixture(String refId, String userId) {
        IStorageUtilityIndexed<FormInstance> userFixtureStorage = CommCareApplication._().getUserStorage("fixture", FormInstance.class);
        IStorageUtilityIndexed<FormInstance> appFixtureStorage = CommCareApplication._().getAppStorage("fixture", FormInstance.class);
        
        Vector<Integer> userFixtures = userFixtureStorage.getIDsForValue(FormInstance.META_ID, refId);
        ///... Nooooot so clean.
        if(userFixtures.size() == 1) {
            //easy case, one fixture, use it
            return (FormInstance)userFixtureStorage.read(userFixtures.elementAt(0).intValue());
            //TODO: Userid check anyway?
        } else if(userFixtures.size() > 1){
            //intersect userid and fixtureid set.
            //TODO: Replace context call here with something from the session, need to stop relying on that coupling
            
            Vector<Integer> relevantUserFixtures = userFixtureStorage.getIDsForValue(FormInstance.META_XMLNS, userId);
            
            if(relevantUserFixtures.size() != 0) {
                Integer userFixture = ArrayUtilities.intersectSingle(userFixtures, relevantUserFixtures);
                if(userFixture != null) {
                    return (FormInstance)userFixtureStorage.read(userFixture.intValue());
                }
            }
        }
        
        //ok, so if we've gotten here there were no fixtures for the user, let's try the app fixtures.
        Vector<Integer> appFixtures = appFixtureStorage.getIDsForValue(FormInstance.META_ID, refId);
        Integer globalFixture = ArrayUtilities.intersectSingle(appFixtureStorage.getIDsForValue(FormInstance.META_XMLNS, ""), appFixtures);
        if(globalFixture != null) {
            return (FormInstance)appFixtureStorage.read(globalFixture.intValue());
        } else {
            //See if we have one manually placed in the suite
            Integer userFixture = ArrayUtilities.intersectSingle(appFixtureStorage.getIDsForValue(FormInstance.META_XMLNS, userId), appFixtures);
            if(userFixture != null) {
                return (FormInstance)appFixtureStorage.read(userFixture.intValue());
            }
            //Otherwise, nothing
            return null;
        }
    }

    /**
     * Used around to count up the degree of specificity for this reference
     * 
     * @param reference
     * @return
     */
    public static int countPreds(TreeReference reference) {
        int preds = 0;
        for(int i =0 ; i < reference.size(); ++i) {
            Vector<XPathExpression> predicates = reference.getPredicate(i);
            if(predicates != null) {
                preds += predicates.size();
            }
        }
        return preds;
    }
    
    public static void printInstance(String instanceRef) {
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataModelSerializer s = new DataModelSerializer(bos, new CommCareInstanceInitializer(null));
            
            s.serialize(new ExternalDataInstance(instanceRef,"instance"), null);
            System.out.println(new String(bos.toByteArray()));
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public static void triggerLogSubmission(Context c) {
        SharedPreferences settings = CommCareApplication._().getCurrentApp().getAppPreferences();
        String url = settings.getString("PostURL", null);
        
        if(url == null) {
            //This is mostly for dev purposes
            Toast.makeText(c, "Couldn't submit logs! Invalid submission URL...", Toast.LENGTH_LONG).show();
        } else {
            LogSubmissionTask reportSubmitter = new LogSubmissionTask(CommCareApplication._(), true, CommCareApplication._().getSession().startDataSubmissionListener(R.string.submission_logs_title), url);
            reportSubmitter.execute();
        }
    }
}