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/*
 * Copyright 2015 Agapsys Tecnologia Ltda-ME.
 *
 * 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.agapsys.http;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.message.BasicNameValuePair;

public abstract class FormUrlEncodedRequest extends EntityRequest {
    // CLASS SCOPE =============================================================
    public static class FormUrlEncodedPost extends FormUrlEncodedRequest {

        public FormUrlEncodedPost(String charset, String uri, Object...uriParams) {
            super(charset, uri, uriParams);
        }

        public FormUrlEncodedPost(String charset) {
            super(charset);
        }

        @Override
        protected HttpRequestBase getCoreRequest(String uri) {
            return new org.apache.http.client.methods.HttpPost(uri);
        }
    }
    
    public static class FormUrlEncodedPut extends FormUrlEncodedRequest {

        public FormUrlEncodedPut(String charset, String uri, Object...uriParams) {
            super(charset, uri, uriParams);
        }

        public FormUrlEncodedPut(String charset) {
            super(charset);
        }

        @Override
        protected HttpRequestBase getCoreRequest(String uri) {
            return new org.apache.http.client.methods.HttpPut(uri);
        }
    }
    
    public static class FormUrlEncodedPatch extends FormUrlEncodedRequest {

        public FormUrlEncodedPatch(String charset, String uri, Object...uriParams) {
            super(charset, uri, uriParams);
        }

        public FormUrlEncodedPatch(String charset) {
            super(charset);
        }

        @Override
        protected HttpRequestBase getCoreRequest(String uri) {
            return new org.apache.http.client.methods.HttpPatch(uri);
        }
    }
    // =========================================================================
    
    // INSTANCE SCOPE ==========================================================
    private final Map params = new LinkedHashMap<>();
    private final String charset;

    public FormUrlEncodedRequest(String charset, String uri, Object...uriParams) {
        super(uri, uriParams);
        if (charset == null || charset.trim().isEmpty())
            throw new IllegalArgumentException("Null/Empty charset");
        
        this.charset = charset;
    }
    
    public FormUrlEncodedRequest(String charset) {
        if (charset == null || charset.trim().isEmpty())
            throw new IllegalArgumentException("Null/Empty charset");
        
        this.charset = charset;
    }
    
    public String getCharset() {
        return charset;
    }
    
    public void addParameter(String name, String value) {
        if (name == null || name.trim().isEmpty())
            throw new IllegalArgumentException("Null/Empty name");
        
        if (value == null)
            value = "";
        
        params.put(name, value);
    }
    
    public String getParameter(String name) {
        return params.get(name);
    }

    @Override
    protected HttpEntity getEntity() {
        List urlParameters = new ArrayList<>();
        
        for (Map.Entry entry : params.entrySet()) {
            urlParameters.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
        }
        
        try {
            return new UrlEncodedFormEntity(urlParameters, charset);
        } catch (UnsupportedEncodingException ex) {
            throw new RuntimeException(ex);
        }
    }
    // =========================================================================
}