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A most easily usable Facebook Messenger Platform API
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/*
* Copyright 2017 Chunlei Wang
*
* 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.github.codedrinker.fm.builder;
import com.github.codedrinker.fm.entity.FMReplyMessage;
import com.github.codedrinker.fm.exception.ButtonsOutOfBoundException;
import org.apache.commons.lang3.StringUtils;
import java.util.ArrayList;
public class FMElementBuilder {
private FMReplyMessage.Element element;
public FMElementBuilder() {
this.element = new FMReplyMessage.Element();
}
public static FMElementBuilder defaultBuilder() {
return new FMElementBuilder();
}
public FMElementBuilder withTitle(String title) {
if (StringUtils.length(title) > FMReplyMessage.TITLE_MAX_SIZE) {
title = title.substring(0, 77) + "...";
}
this.element.setTitle(title);
return this;
}
public FMElementBuilder withSubtitle(String subtitle) {
if (StringUtils.length(subtitle) > FMReplyMessage.TITLE_MAX_SIZE) {
subtitle = subtitle.substring(0, 77) + "...";
}
this.element.setSubtitle(subtitle);
return this;
}
public FMElementBuilder withItemUrl(String itemUrl) {
this.element.setItem_url(itemUrl);
return this;
}
public FMElementBuilder withImageUrl(String imageUrl) {
this.element.setImage_url(imageUrl);
return this;
}
public FMElementBuilder withButtons(FMReplyMessage.Button... buttons) {
if (buttons != null && buttons.length > FMReplyMessage.BUTTON_MAX_SIZE) {
throw new ButtonsOutOfBoundException();
}
if (this.element.getButtons() == null) {
this.element.setButtons(new ArrayList());
}
for (FMReplyMessage.Button button : buttons) {
this.element.getButtons().add(button);
}
return this;
}
public FMReplyMessage.Element build() {
return this.element;
}
}