com.intellij.tasks.trello.TrelloUtil.java Source code

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Here is the source code for com.intellij.tasks.trello.TrelloUtil.java

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/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 com.intellij.tasks.trello;

import static com.intellij.tasks.trello.model.TrelloLabel.LabelColor;

import java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;
import java.util.regex.Pattern;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.reflect.TypeToken;
import com.intellij.tasks.trello.model.TrelloBoard;
import com.intellij.tasks.trello.model.TrelloCard;
import com.intellij.tasks.trello.model.TrelloCommentAction;
import com.intellij.tasks.trello.model.TrelloList;

/**
 * @author Mikhail Golubev
 */
public class TrelloUtil {
    public static final Pattern TRELLO_ID_PATTERN = Pattern.compile("[a-z0-9]{24}");
    public static final Gson GSON = buildGson();
    public static final String TRELLO_API_BASE_URL = "https://api.trello.com/1";
    public static final TypeToken<List<TrelloCard>> LIST_OF_CARDS_TYPE = new TypeToken<List<TrelloCard>>() { /* empty */
    };
    public static final TypeToken<List<TrelloBoard>> LIST_OF_BOARDS_TYPE = new TypeToken<List<TrelloBoard>>() { /* empty */
    };
    public static final TypeToken<List<TrelloList>> LIST_OF_LISTS_TYPE = new TypeToken<List<TrelloList>>() { /* empty */
    };
    public static final TypeToken<List<TrelloCommentAction>> LIST_OF_COMMENTS_TYPE = new TypeToken<List<TrelloCommentAction>>() { /* empty */
    };

    private static Gson buildGson() {
        GsonBuilder gson = new GsonBuilder();
        gson.registerTypeAdapter(Date.class, new DateDeserializer());
        gson.registerTypeAdapter(LabelColor.class, new LabelColorDeserializer());
        return gson.create();
    }

    private static class DateDeserializer implements JsonDeserializer<Date> {
        // Trello send UTC dates, so time zone is always Z
        private static final DateFormat ISO8601_DATETIME_FORMAT = new SimpleDateFormat(
                "yyyy-MM-dd'T'hh:mm:ss.SSS'Z'");

        static {
            ISO8601_DATETIME_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
        }

        @Override
        public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                throws JsonParseException {
            String dateString = json.getAsString();
            try {
                return ISO8601_DATETIME_FORMAT.parse(dateString);
            } catch (ParseException e) {
                throw null;
            }
        }
    }

    private static class LabelColorDeserializer implements JsonDeserializer<LabelColor> {
        @Override
        public LabelColor deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                throws JsonParseException {
            final String colorName = json.getAsString().toUpperCase();
            if (colorName.isEmpty()) {
                return LabelColor.NO_COLOR;
            }
            try {
                return LabelColor.valueOf(colorName);
            } catch (IllegalArgumentException e) {
                return LabelColor.NO_COLOR;
            }
        }
    }
}