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/*
 * Copyright 2007, BigTribe Corporation. All rights reserved.
 *
 * This software is an unpublished work subject to a confidentiality agreement
 * and protected by copyright and trade secret law.  Unauthorized copying,
 * redistribution or other use of this work is prohibited.  All copies must
 * retain this copyright notice.  Any use or exploitation of this work without
 * authorization could subject the perpetrator to criminal and civil liability.
 * 
 * Redistribution and use in source and binary forms, with or without        
 * modification, are permitted provided that the following conditions        
 * are met:                                                                  
 *                                                                           
 * 1. Redistributions of source code must retain the above copyright         
 *    notice, this list of conditions and the following disclaimer.          
 * 2. Redistributions in binary form must reproduce the above copyright      
 *    notice, this list of conditions and the following disclaimer in the    
 *    documentation and/or other materials provided with the distribution.   
 *
 * The information in this software is subject to change without notice
 * and should not be construed as a commitment by BigTribe Corporation.
 *
 * The above copyright notice does not indicate actual or intended publication
 * of this source code.
 *
 * $Id: bigtribetemplates.xml 5524 2006-04-06 09:40:52 -0700 (Thu, 06 Apr 2006) greening $
 */
package com.google.code.facebookapi;

import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * Utility class to assist in creating a templatized action for publishing to the minifeed/newsfeed, because the API call Facebook decided to add in order to do it is
 * ridiculously complex.
 */
public class TemplatizedAction {

	protected static Log log = LogFactory.getLog( TemplatizedAction.class );

	private String titleTemplate;
	private String bodyTemplate;
	private String bodyGeneral;
	private String targetIds;
	private JSONObject titleParams;
	private JSONObject bodyParams;
	private List> pictures;
	private Long pageActorId;

	public static final String UID_TOKEN = "http://UID/";

	private TemplatizedAction() {
		// empty constructor not allowed, at a minimum the titleTemplate parameter is needed
	}

	/**
	 * Constructor
	 * 
	 * @param titleTemplate
	 *            the title-template to set.
	 */
	public TemplatizedAction( String titleTemplate ) {
		this.setTitleTemplate( titleTemplate );
		this.titleParams = new JSONObject();
		this.bodyParams = new JSONObject();
		this.bodyTemplate = null;
		this.bodyGeneral = null;
		this.targetIds = null;
		this.pictures = new ArrayList>();
		this.pageActorId = null;
	}

	/**
	 * Constructor
	 * 
	 * @param titleTemplate
	 *            the title template to use
	 * @param bodyTemplate
	 *            the body template to use
	 */
	public TemplatizedAction( String titleTemplate, String bodyTemplate ) {
		this( titleTemplate );
		this.setBodyTemplate( bodyTemplate );
		this.bodyGeneral = null;
		this.targetIds = null;
	}

	/**
	 * Constructor
	 * 
	 * @param titleTemplate
	 *            the title template to use
	 * @param bodyTemplate
	 *            the body template to use
	 * @param bodyGeneral
	 *            the non-templatized body content to use
	 */
	public TemplatizedAction( String titleTemplate, String bodyTemplate, String bodyGeneral ) {
		this( titleTemplate, bodyTemplate );
		this.setBodyGeneral( bodyGeneral );
		this.targetIds = null;
	}

	/**
	 * Remove a picture from the list, this can be used to revise the list/free up space for alternate pictures.
	 * 
	 * @param index
	 *            the index to remove from.
	 */
	public void removePicture( int index ) {
		if ( ( this.pictures == null ) || ( index > this.pictures.size() ) ) {
			return;
		}
		this.pictures.remove( index );
	}

	/**
	 * Add a picture to be associated with this feed entry, along with a link to be associated with the picture (clicking on the picture in the feed will go to the
	 * specified link).
*
* Note that only 4 pictures may be present at any given time. Any pictures beyond this are ignored. Use removePicture if you need to change something after 4 * pictures have been added. * * @param imageUid * the id of the image to display. This can be a picture id or a Facebook user-id. * @param linkHref * the URL of the link to go to when the image is clicked. */ public void addPicture( Long imageUid, String linkHref ) { addPicture( Long.toString( imageUid ), linkHref ); } /** * Add a picture to be associated with this feed entry, along with a link to be associated with the picture (clicking on the picture in the feed will go to the * specified link).
*
* Note that only 4 pictures may be present at any given time. Any pictures beyond this are ignored. Use removePicture if you need to change something after 4 * pictures have been added. * * @param imageHref * the URL of the image to display in the feed. * @param linkHref * the URL of the link to go to when the image is clicked. */ public void addPicture( String imageHref, String linkHref ) { if ( linkHref == null ) { this.addPicture( imageHref ); } try { if ( !imageHref.startsWith( "http" ) ) { imageHref = UID_TOKEN + imageHref; } addPicture( new URL( imageHref ), new URL( linkHref ) ); } catch ( Exception ex ) { log.warn( "Could not add entry for picture!", ex ); } } /** * Add a picture to be associated with this feed entry, the picture will not have an associated link. * * Note that only 4 pictures may be present at any given time. Any pictures beyond this are ignored. Use removePicture if you need to change something after 4 * pictures have been added. * * @param imageHref * the URL of the image to display in the feed. */ public void addPicture( String imageHref ) { try { if ( !imageHref.startsWith( "http" ) ) { imageHref = UID_TOKEN + imageHref; } addPicture( new URL( imageHref ), null ); } catch ( Exception ex ) { log.warn( "Could not add entry for picture!", ex ); } } private void addPicture( URL imageUrl, URL linkUrl ) { if ( this.pictures == null ) { this.pictures = new ArrayList>(); } if ( this.pictures.size() < 4 ) { this.pictures.add( new Pair( imageUrl, linkUrl ) ); } } /** * Set the pictures to display all at once, if you feel like building the Collection> on your own. Otherwise use the more convenient addPic() method * instead. * * @param pics * the pictures to set. */ public void setPictures( List> pics ) { if ( ( pics == null ) || ( pics.isEmpty() ) ) { this.pictures = null; return; } if ( pics.size() <= 4 ) { this.pictures = (List>) pics; } if ( pics.size() > 4 ) { int count = 0; for ( IPair pic : pics ) { this.pictures.add( pic ); count++ ; if ( count == 4 ) { break; } } } } /** * Get the list of pictures. * * @return the list of pictures. */ public Collection> getPictures() { if ( ( this.pictures == null ) || ( this.pictures.isEmpty() ) ) { return null; } return this.pictures; } /** * Add a parameter value for the title template. It will be used to replace the corresponding token when the feed entry is rendered. * * @param key * the name of the parameter/token. * @param value * the value to set it to. */ public void addTitleParam( String key, String value ) { addParam( titleParams, key, value ); } /** * Add a parameter value for the body template. It will be used to replace the corresponding token when the feed entry is rendered. * * @param key * the name of the parameter/token. * @param value * the value to set it to. */ public void addBodyParam( String key, String value ) { addParam( bodyParams, key, value ); } private void addParam( JSONObject map, String key, String value ) { if ( ( "actor".equals( key ) ) || ( "target".equals( key ) ) ) { throw new RuntimeException( key + " is a reserved token name, you cannot set it yourself!" ); } try { map.put( key, value ); } catch ( JSONException ex ) { log.warn( "JSONException for key=" + key + ", value=" + value + "!", ex ); } } /** * Get the title params as a JSON-formatted string. * * @return the parameters for the templatized title tokens. */ public String getTitleParams() { return getJsonParams( titleParams ); } /** * Get the body params as a JSON-formatted string. * * @return the parameters for the templatized body tokens. */ public String getBodyParams() { return getJsonParams( bodyParams ); } private String getJsonParams( JSONObject params ) { if ( params.length() == 0 ) { return null; } return params.toString(); } /** * @return the bodyGeneral */ public String getBodyGeneral() { return bodyGeneral; } /** * Set the general body content for this feed entry. This is optional, non-templatized markup, and is distinct from and unrelated to bodyTemplate. A feed entry can * have both at once, either or, or neither. * * @param bodyGeneral * non-templatized markup that will be displayed in this feed entry. When multiple entries are aggregated, only the bodyGeneral from (an arbitrarily * chosen) one of them will appear in the aggregate entry, meaning that any markup specified here must be generic enough that it can make sense in any * context. */ public void setBodyGeneral( String bodyGeneral ) { if ( "".equals( bodyGeneral ) ) { bodyGeneral = null; } this.bodyGeneral = bodyGeneral; } /** * @return the bodyTemplate */ public String getBodyTemplate() { return bodyTemplate; } /** * Set the body template for this feed entry. The body template is optinal. * * @param bodyTemplate * templatized markup that will be used to compute the body section of this feed entry. Unlike titleTemplate, this markup *is not* required to utilize the * "{actor}" token, although you may choose to use any desired tokens in this section if you wish. */ public void setBodyTemplate( String bodyTemplate ) { if ( "".equals( bodyTemplate ) ) { bodyTemplate = null; } this.bodyTemplate = bodyTemplate; } /** * @return the targetIds */ public String getTargetIds() { if ( "".equals( targetIds ) ) { targetIds = null; } return targetIds; } /** * Set the target ids of friends who are associated with this action. This must be specified if you have used the "{target}" token in any of your markup.
*
* This method will clear out any previously added target ids. To append additional target ids to a previous list, use addTargetIds instead. * * @param targetIds * a comma-seperated list of Facebook UID's representing any friends of the current user who are associated with the action being published (so if the * action is "Bob waves to Sally and Susie", Sally and Susie are the targets). */ public void setTargetIds( String targetIds ) { if ( "".equals( targetIds ) ) { targetIds = null; } this.targetIds = targetIds; } /** * Append to the list of friends who are associated with this action.
*
* This method *will not* clear out any previously added target ids. * * @param newIds * a comma-seperated list of Facebook UID's representing any friends of the current user who are associated with the action being published (so if the * action is "Bob waves to Sally and Susie", Sally and Susie are the targets). */ public void addTargetIds( String newIds ) { if ( this.targetIds == null ) { this.targetIds = ""; } if ( !"".equals( this.targetIds ) ) { this.targetIds += ","; } this.targetIds += newIds; } /** * Set the target ids of friends who are associated with this action. This must be specified if you have used the "{target}" token in any of your markup.
*
* This method will clear out any previously added target ids. To append additional target ids to a previous list, use addTargetIds instead. * * @param facebookIds * a list of all the Facebook UID to specify as targets. The elements in the collection may only be of type Integer or type String. */ public void setTargetIds( Collection facebookIds ) { if ( facebookIds.isEmpty() ) { this.targetIds = null; return; } this.targetIds = ""; for ( Object current : facebookIds ) { if ( !"".equals( this.targetIds ) ) { this.targetIds += ","; } this.targetIds += current; } } /** * Append to the set of friends who are associated with this action. This must be specified if you have used the "{target}" token in any of your markup.
*
* This method *will not* clear out any previously added target ids. * * @param facebookIds * a list of all the Facebook UID to specify as targets. The elements in the collection may only be of type Long or type String. */ public void addTargetIds( Collection facebookIds ) { if ( this.targetIds == null ) { this.targetIds = ""; } for ( Object current : facebookIds ) { if ( !"".equals( this.targetIds ) ) { this.targetIds += ","; } this.targetIds += current; } } /** * @return the titleTemplate */ public String getTitleTemplate() { return titleTemplate; } /** * Set the title template for this feed entry. This is a required field, and the template must always contain the "{actor}" token. * * @param titleTemplate * templatized markup to use as the title of this feed entry. It must contain the "{actor}" token. */ public void setTitleTemplate( String titleTemplate ) { if ( titleTemplate == null ) { throw new RuntimeException( "The title-template cannot be null!" ); } if ( !titleTemplate.contains( "{actor}" ) && !titleTemplate.contains( "{*actor*}" ) ) { throw new RuntimeException( titleTemplate + " is an invalid template! The title-template must contain the \"{actor}\" token." ); } this.titleTemplate = titleTemplate; } /** * @return the page actor-id */ public Long getPageActorId() { return pageActorId; } /** * @param pageActorId * the page actor-id to set */ public void setPageActorId( Long pageActorId ) { this.pageActorId = pageActorId; } }