net.peterkuterna.android.apps.devoxxsched.io.RemoteSpeakersHandler.java Source code

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Here is the source code for net.peterkuterna.android.apps.devoxxsched.io.RemoteSpeakersHandler.java

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/*
 * Copyright 2010 Peter Kuterna
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.peterkuterna.android.apps.devoxxsched.io;

import static net.peterkuterna.android.apps.devoxxsched.util.ParserUtils.sanitizeId;

import java.util.ArrayList;
import java.util.HashSet;

import net.peterkuterna.android.apps.devoxxsched.provider.ScheduleContract;
import net.peterkuterna.android.apps.devoxxsched.provider.ScheduleContract.Speakers;
import net.peterkuterna.android.apps.devoxxsched.util.Lists;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;

/**
 * Handle a remote {@link JSONArray} that defines a set of {@link Speakers}
 * entries.
 */
public class RemoteSpeakersHandler extends JSONHandler {

    private static final String TAG = "SpeakersHandler";

    public RemoteSpeakersHandler() {
        super(ScheduleContract.CONTENT_AUTHORITY);
    }

    @Override
    public ArrayList<ContentProviderOperation> parse(ArrayList<JSONArray> entries, ContentResolver resolver)
            throws JSONException {
        final ArrayList<ContentProviderOperation> batch = Lists.newArrayList();
        final HashSet<String> speakerIds = new HashSet<String>();

        int nrEntries = 0;
        for (JSONArray speakers : entries) {
            Log.d(TAG, "Retrieved " + speakers.length() + " speaker entries.");
            nrEntries += speakers.length();

            for (int i = 0; i < speakers.length(); i++) {
                JSONObject speaker = speakers.getJSONObject(i);
                String id = speaker.getString("id");

                final String speakerId = sanitizeId(id);
                final Uri speakerUri = Speakers.buildSpeakerUri(speakerId);
                speakerIds.add(speakerId);

                boolean speakerUpdated = false;
                boolean newSpeaker = false;
                boolean build = false;
                ContentProviderOperation.Builder builder;
                if (isRowExisting(Speakers.buildSpeakerUri(speakerId), SpeakersQuery.PROJECTION, resolver)) {
                    builder = ContentProviderOperation.newUpdate(speakerUri);
                    speakerUpdated = isSpeakerUpdated(speakerUri, speaker, resolver);
                } else {
                    newSpeaker = true;
                    builder = ContentProviderOperation.newInsert(Speakers.CONTENT_URI);
                    builder.withValue(Speakers.SPEAKER_ID, speakerId);
                    build = true;
                }

                if (newSpeaker || speakerUpdated) {
                    builder.withValue(Speakers.FIRST_NAME, speaker.getString("firstName"));
                    builder.withValue(Speakers.LAST_NAME, speaker.getString("lastName"));
                    builder.withValue(Speakers.BIO, speaker.getString("bio"));
                    builder.withValue(Speakers.COMPANY, speaker.getString("company"));
                    builder.withValue(Speakers.IMAGE_URL, speaker.getString("imageURI"));
                    build = true;
                }
                if (build)
                    batch.add(builder.build());
            }
        }

        if (isRemoteSync() && nrEntries > 0) {
            for (String lostId : getLostIds(speakerIds, Speakers.CONTENT_URI, SpeakersQuery.PROJECTION,
                    SpeakersQuery.SPEAKER_ID, resolver)) {
                Uri deleteUri = Speakers.buildSessionsDirUri(lostId);
                batch.add(ContentProviderOperation.newDelete(deleteUri).build());
                deleteUri = Speakers.buildSpeakerUri(lostId);
                batch.add(ContentProviderOperation.newDelete(deleteUri).build());
            }
        }

        return batch;
    }

    private static boolean isSpeakerUpdated(Uri uri, JSONObject speaker, ContentResolver resolver)
            throws JSONException {
        final Cursor cursor = resolver.query(uri, SpeakersQuery.PROJECTION, null, null, null);
        try {
            if (!cursor.moveToFirst())
                return false;

            final String curFirstName = cursor.getString(SpeakersQuery.FIRST_NAME).toLowerCase().trim();
            final String curLastName = cursor.getString(SpeakersQuery.LAST_NAME).toLowerCase().trim();
            final String curBio = cursor.getString(SpeakersQuery.BIO).toLowerCase().trim();
            final String curCompany = cursor.getString(SpeakersQuery.COMPANY).toLowerCase().trim();
            final String newFirstName = speaker.has("firstName")
                    ? speaker.getString("firstName").toLowerCase().trim()
                    : curFirstName;
            final String newLastName = speaker.has("lastName") ? speaker.getString("lastName").toLowerCase().trim()
                    : curLastName;
            final String newBio = speaker.has("bio") ? speaker.getString("bio").toLowerCase().trim() : curBio;
            final String newCompany = speaker.has("company") ? speaker.getString("company").toLowerCase().trim()
                    : curCompany;

            return (!curFirstName.equals(newFirstName) || !curLastName.equals(newLastName) || !curBio.equals(newBio)
                    || !curCompany.equals(newCompany));
        } finally {
            cursor.close();
        }
    }

    private interface SpeakersQuery {
        String[] PROJECTION = { Speakers.SPEAKER_ID, Speakers.FIRST_NAME, Speakers.LAST_NAME, Speakers.BIO,
                Speakers.COMPANY, };

        int SPEAKER_ID = 0;
        int FIRST_NAME = 1;
        int LAST_NAME = 2;
        int BIO = 3;
        int COMPANY = 4;
    }

}