/*
 * Copyright (C) 2016 Red Hat, 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 io.syndesis.server.credential;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;

import org.springframework.social.oauth1.OAuthToken;

public final class CredentialModule extends SimpleModule {

    private static final long serialVersionUID = 1L;

    @SuppressWarnings("PMD.AssignmentInOperand")
    private static final class OAuthTokenDeserializer extends JsonDeserializer<OAuthToken> {
        @Override
        public OAuthToken deserialize(final JsonParser p, final DeserializationContext ctxt)
            throws IOException, JsonProcessingException {
            final Map<String, String> values = new HashMap<>();
            String fieldName;
            while ((fieldName = p.nextFieldName()) != null) {
                final String nextValue = p.nextTextValue();
                values.put(fieldName, nextValue);
            }

            return new OAuthToken(values.get("value"), values.get("secret"));
        }
    }

    public CredentialModule() {
        addDeserializer(OAuthToken.class, new OAuthTokenDeserializer());
    }
}
