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Liferay Dynamic Data Mapping API
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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.dynamic.data.mapping.storage;

import com.liferay.dynamic.data.mapping.model.DDMStructure;
import com.liferay.dynamic.data.mapping.service.DDMStructureLocalServiceUtil;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.HashUtil;
import com.liferay.portal.kernel.util.ListUtil;
import com.liferay.portal.kernel.util.LocaleUtil;
import com.liferay.portal.kernel.util.StringPool;

import java.io.Serializable;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Set;

/**
 * @author Brian Wing Shun Chan
 * @author Marcellus Tavares
 */
public class Field implements Serializable {

	public Field() {
	}

	public Field(
		long ddmStructureId, String name, List values,
		Locale locale) {

		_ddmStructureId = ddmStructureId;
		_name = name;
		_valuesMap.put(locale, values);
	}

	public Field(
		long ddmStructureId, String name,
		Map> valuesMap, Locale defaultLocale) {

		_ddmStructureId = ddmStructureId;
		_name = name;
		_valuesMap = valuesMap;
		_defaultLocale = defaultLocale;
	}

	public Field(long ddmStructureId, String name, Serializable value) {
		_ddmStructureId = ddmStructureId;
		_name = name;

		setValue(value);
	}

	public Field(String name, Serializable value) {
		this(0, name, value);
	}

	public void addValue(Locale locale, Serializable value) {
		List values = _valuesMap.get(locale);

		if (values == null) {
			values = new ArrayList<>();

			_valuesMap.put(locale, values);
		}

		values.add(value);
	}

	public void addValues(Locale locale, List values) {
		for (Serializable value : values) {
			addValue(locale, value);
		}
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}

		if (!(obj instanceof Field)) {
			return false;
		}

		Field field = (Field)obj;

		if ((_ddmStructureId == field._ddmStructureId) &&
			Objects.equals(_name, field._name) &&
			Objects.equals(_valuesMap, field._valuesMap)) {

			return true;
		}

		return false;
	}

	public Set getAvailableLocales() {
		return _valuesMap.keySet();
	}

	public String getDataType() throws PortalException {
		DDMStructure ddmStructure = getDDMStructure();

		return ddmStructure.getFieldDataType(_name);
	}

	public DDMStructure getDDMStructure() {
		return DDMStructureLocalServiceUtil.fetchStructure(_ddmStructureId);
	}

	public long getDDMStructureId() {
		return _ddmStructureId;
	}

	public Locale getDefaultLocale() {
		return _defaultLocale;
	}

	public String getName() {
		return _name;
	}

	public String getRenderedValue(Locale locale) throws PortalException {
		FieldRenderer fieldRenderer = getFieldRenderer();

		return fieldRenderer.render(this, locale);
	}

	public String getRenderedValue(Locale locale, int valueIndex)
		throws PortalException {

		FieldRenderer fieldRenderer = getFieldRenderer();

		return fieldRenderer.render(this, locale, valueIndex);
	}

	public String getType() throws PortalException {
		DDMStructure ddmStructure = getDDMStructure();

		return ddmStructure.getFieldType(_name);
	}

	public Serializable getValue() {
		Locale defaultLocale = getDefaultLocale();

		return getValue(defaultLocale);
	}

	public Serializable getValue(Locale locale) {
		List values = _getValues(locale);

		if (values.isEmpty()) {
			return null;
		}

		try {
			DDMStructure ddmStructure = getDDMStructure();

			if (ddmStructure == null) {
				return values.get(0);
			}

			if (isRepeatable() || (values.size() > 1)) {
				return FieldConstants.getSerializable(getDataType(), values);
			}

			return values.get(0);
		}
		catch (Exception e) {
			_log.error(e);
		}

		return null;
	}

	public Serializable getValue(Locale locale, int index) {
		List values = _getValues(locale);

		if (index >= values.size()) {
			return null;
		}

		return values.get(index);
	}

	public List getValues(Locale locale) {
		return _getValues(locale);
	}

	public Map> getValuesMap() {
		return _valuesMap;
	}

	@Override
	public int hashCode() {
		int hash = HashUtil.hash(0, _ddmStructureId);

		hash = HashUtil.hash(hash, _name);

		return HashUtil.hash(hash, _valuesMap);
	}

	public boolean isPrivate() {
		try {
			if (_name.startsWith(StringPool.UNDERLINE)) {
				return true;
			}

			return false;
		}
		catch (Exception e) {
			return false;
		}
	}

	public boolean isRepeatable() throws PortalException {
		if (isPrivate()) {
			return false;
		}

		DDMStructure ddmStructure = getDDMStructure();

		return ddmStructure.isFieldRepeatable(_name);
	}

	public void setDDMStructureId(long ddmStructureId) {
		_ddmStructureId = ddmStructureId;
	}

	public void setDefaultLocale(Locale defaultLocale) {
		_defaultLocale = defaultLocale;
	}

	public void setName(String name) {
		_name = name;
	}

	public void setValue(Locale locale, Serializable value) {
		List values = null;

		if (value != null) {
			Class clazz = value.getClass();

			if (clazz.isArray()) {
				values = ListUtil.fromArray((Serializable[])value);
			}
		}

		if (values == null) {
			values = new ArrayList<>();

			values.add(value);
		}

		_valuesMap.put(locale, values);
	}

	public void setValue(Serializable value) {
		setValue(LocaleUtil.getSiteDefault(), value);
	}

	public void setValues(Locale locale, List values) {
		_valuesMap.put(locale, values);
	}

	public void setValuesMap(Map> valuesMap) {
		_valuesMap = valuesMap;
	}

	protected FieldRenderer getFieldRenderer() throws PortalException {
		DDMStructure ddmStructure = getDDMStructure();

		String dataType = null;

		if (ddmStructure != null) {
			dataType = getDataType();
		}

		return FieldRendererFactory.getFieldRenderer(dataType);
	}

	private List _getValues(Locale locale) {
		Set availableLocales = getAvailableLocales();

		if (!availableLocales.contains(locale)) {
			locale = getDefaultLocale();
		}

		if (locale == null) {
			locale = LocaleUtil.getSiteDefault();
		}

		List values = _valuesMap.get(locale);

		if (values == null) {
			return Collections.emptyList();
		}

		return values;
	}

	private static final Log _log = LogFactoryUtil.getLog(Field.class);

	private long _ddmStructureId;
	private Locale _defaultLocale;
	private String _name;
	private Map> _valuesMap = new HashMap<>();

}