ltt.intership.data.StreamRenderer.java Source code

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Here is the source code for ltt.intership.data.StreamRenderer.java

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/*
 * Copyright 2010 Facebook, Inc.
 *
 * 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 ltt.intership.data;

import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

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

import android.util.Log;

public class StreamRenderer {
    static List<Post> model = new ArrayList<Post>();

    public static void render(JSONObject data) {
        StreamRenderer renderer = new StreamRenderer();
        renderer.doRender(data);
    }

    public static SimpleDateFormat getDateFormat() {
        return new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ssZ");
    }

    private void doRender(JSONObject data) {

        try {
            JSONArray posts = data.getJSONArray("data");

            for (int i = 0; i < posts.length(); i++) {
                renderPost(posts.getJSONObject(i));

            }

        } catch (JSONException e) {
            // TODO Auto-generated catch bloc
            e.printStackTrace();
        }
    }

    private void renderPost(JSONObject post) throws JSONException {
        Post p = new Post();
        renderFrom(post, p);
        renderTo(post, p);
        renderMessage(post, p);
        renderAttachment(post, p);
        renderTimeStamp(post, p);
        renderLikes(post, p);
        renderComments(post, p);
        model.add(p);
    }

    private void renderFrom(JSONObject post, Post p) throws JSONException {
        JSONObject from = post.getJSONObject("from");
        String fromName = from.getString("name");
        String fromId = from.getString("id");
        p.setSrcFrom("src=http://graph.facebook.com/" + fromId + "/picture");
        p.setNameFrom(fromName);

    }

    private void renderTo(JSONObject post, Post p) throws JSONException {
        JSONObject to = post.optJSONObject("to");
        if (to != null) {
            JSONObject toData = to.getJSONArray("data").getJSONObject(0);
            String toName = toData.getString("name");
            String toId = toData.getString("id");
            p.setSrcTo("src=http://graph.facebook.com/" + toId + "/picture");
            p.setNameTo(toName);
        }
    }

    private void renderMessage(JSONObject post, Post p) {
        String message = post.optString("message");
        p.setMessage(message);
    }

    private void renderAttachment(JSONObject post, Post p) {
        String name = post.optString("name");
        String link = post.optString("link");
        String picture = post.optString("picture");
        String source = post.optString("source"); // for videos
        String caption = post.optString("caption");
        String description = post.optString("description");

        String[] fields = new String[] { name, link, picture, source, caption, description };
        boolean hasAttachment = false;
        for (String field : fields) {
            if (field.length() != 0) {
                hasAttachment = true;
                break;
            }
        }

        if (!hasAttachment) {
            return;
        }

        if (link != null) {
            p.setLink(link);
        }
        if (caption != "") {
            p.setCaption(caption);
        }

        if (picture != "") {
            p.setPicture(picture);
        }

        if (description != "") {
            p.setDescription(description);
        }

    }

    private void renderTimeStamp(JSONObject post, Post p) {
        String dateStr = post.optString("created_time");
        SimpleDateFormat formatter = getDateFormat();
        ParsePosition pos = new ParsePosition(0);
        Date date = formatter.parse(dateStr, pos);
        p.setTime(date);
    }

    private void renderLikes(JSONObject post, Post p) throws JSONException {

        JSONObject likes = post.optJSONObject("likes");
        if (likes != null) {
            JSONArray data = likes.optJSONArray("data");

            if (data.length() > 0) {
                String desc = data.length() == 1 ? " person likes this" : " people like this";

                p.setNumberLike(new Integer(data.length()).toString() + desc);
                for (int j = 0; j < data.length(); j++) {
                    JSONObject like = data.getJSONObject(j);
                    renderLike(like, p);
                }
            }

        }

    }

    private void renderLike(JSONObject like, Post p) {

        String authorId = like.optString("id");
        String authorName = like.optString("name");
        String src = "http://graph.facebook.com/" + authorId + "/picture";

        p.setLike(src, authorName);
    }

    private void renderComments(JSONObject post, Post p) throws JSONException {
        JSONObject comments = post.optJSONObject("comments");
        if (comments != null) {
            JSONArray data = comments.optJSONArray("data");

            if (data != null) {
                String desc = data.length() == 1 ? " person comments this" : " people comment this";

                p.setNumberComments(new Integer(data.length()).toString() + desc);
                for (int j = 0; j < data.length(); j++) {

                    JSONObject comment = data.getJSONObject(j);
                    renderComment(comment, p);
                }
            }
        }

    }

    private void renderComment(JSONObject comment, Post p) {
        JSONObject from = comment.optJSONObject("from");

        String src = "";
        String authorName = "";
        String authorId = "";
        if (from == null) {
            Log.w("StreamRenderer", "Comment missing from field: " + comment.toString());
        } else {
            authorId = from.optString("id");
            authorName = from.optString("name");
            src = "http://graph.facebook.com/" + authorId + "/picture";
        }

        String message = comment.optString("message");
        p.setComment(src, authorName, message);
    }

    public static int getLengList() {
        return model.size();
    }

    public static Post getList(int index) {
        return model.get(index);
    }

}