<?php
// Drupal Voting Service
// Written by Travis Tidwell @ www.travistidwell.com

function voting_service_perm() {
   return array('allow remote voting'); 
}

/**
 * Implementation of hook_help().
 */
function voting_service_help($section = 'admin/help#services_voting') {
  switch ($section) {
    case 'admin/settings/modules#description':
      return t('Provides voting methods to services applications. Requires services.module.');
  }
}

/**
 * Implementation of hook_service()
 */
function voting_service_service() {
  return array(
    
    // vote.get
    array(
      '#method'   => 'vote.getVote',
      '#callback' => 'voting_service_get_vote',
      '#access arguments' => array('access content'),
      '#key'      => FALSE,
      '#args'     => array(
        array(
          '#name'         => 'content_type',
          '#type'         => 'string',
          '#description'  => t('The type of content which you are voting for.')),
        array(
          '#name'         => 'content_id',
          '#type'         => 'int',
          '#description'  => t('The ID of the content which you are voting for.')),
        array(
          '#name'         => 'tag',
          '#type'         => 'string',
          '#description'  => t('The category of the vote within the content type.'),
          '#optional'     => TRUE)      
      ),
      '#return'   => 'array',
      '#help'     => t('Returns a vote.')),
      
    array(
      '#method'   => 'vote.getUserVote',
      '#callback' => 'voting_service_get_user_vote',
      '#access arguments' => array('access content'),
      '#key'      => FALSE,
      '#args'     => array(
        array(
          '#name'         => 'content_type',
          '#type'         => 'string',
          '#description'  => t('The type of content which you are voting for.')),
        array(
          '#name'         => 'content_id',
          '#type'         => 'int',
          '#description'  => t('The ID of the content which you are voting for.')),
        array(
          '#name'         => 'tag',
          '#type'         => 'string',
          '#description'  => t('The category of the vote within the content type.'),
          '#optional'     => TRUE)       
      ),
      '#return'   => 'array',
      '#help'     => t('Returns a vote.')),      
      
    // vote.set
    array(
      '#method'   => 'vote.setVote',
      '#callback' => 'voting_service_set_vote',
      '#access arguments' => array('allow remote voting'),
      '#args'     => array(
        array(
          '#name'         => 'content_type',
          '#type'         => 'string',
          '#description'  => t('The type of content which you are voting for.')),
        array(
          '#name'         => 'content_id',
          '#type'         => 'int',
          '#description'  => t('The ID of the content which you are voting for.')),
        array(
          '#name'         => 'vote_value',
          '#type'         => 'int',
          '#description'  => t('The value of the vote.')),
        array(
          '#name'         => 'tag',
          '#type'         => 'string',
          '#description'  => t('The category of the vote within the content type.'),
          '#optional'     => TRUE)                        
      ),
      '#return'   => 'array',         
      '#help'     => t('Submit a new vote.')),
    
    // vote.delete
    array(
      '#method'   => 'vote.deleteVote',
      '#callback' => 'voting_service_delete_vote',
      '#access arguments' => array('allow remote voting'),
      '#args'     => array(
        array(
          '#name'         => 'content_type',
          '#type'         => 'string',
          '#description'  => t('The type of content which you are deleting.')),
        array(
          '#name'         => 'content_id',
          '#type'         => 'int',
          '#description'  => t('The ID of the content which you are deleting.')),
        array(
          '#name'         => 'tag',
          '#type'         => 'string',
          '#description'  => t('The category of the vote within the content type.'),
          '#optional'     => TRUE)
      ),
      '#return'   => 'array',      
      '#help'     => t('Delete a vote.')),
  );
}

function voting_service_get_user_vote($content_type, $content_id, $tag = "vote") {
   global $user;	
	
   if( $user->uid ) {
      $criteria['content_type'] = $content_type;
      $criteria['content_id'] = $content_id;
      $criteria['tag'] = $tag;
      $criteria['value_type'] = 'percent';
      $criteria['uid'] = $user->uid; 
      $votes = votingapi_select_votes($criteria);
   }
            
   if($votes) {
      return $votes[0];   
   }
   else
   {
      return array('type'=> $content_type, 'tag' => $tag, 'value' => 0);
   }      
}

/**
 * Returns a specified node.
 */
function voting_service_get_vote($content_type, $content_id, $tag = "vote") {
   $criteria['content_type'] = $content_type;
   $criteria['content_id'] = $content_id;
   $criteria['tag'] = $tag;
   $criteria['value_type'] = 'percent';
   $criteria['function'] = 'average';
   $votes = votingapi_select_results($criteria);
   
   if($votes) {
      return $votes[0];   
   }
   else
   {
      return array('type'=> $content_type, 'tag' => $tag, 'value' => 0);
   }
}

function voting_service_set_vote($content_type, $content_id, $vote_value, $tag = "vote") {
   $vote['content_type'] = $content_type;
   $vote['content_id'] = $content_id;
   $vote['value'] = $vote_value;
   $vote['tag'] = $tag;
   votingapi_set_votes( $vote ); 
   votingapi_recalculate_results($content_type, $content_id, TRUE);
   return voting_service_get_vote( $content_type, $content_id, $tag );
}

function voting_service_delete_vote($content_type, $content_id, $tag = "vote") {
   global $user;
   $criteria['content_type'] = $content_type;
   $criteria['content_type'] = $content_id;
   $criteria['tag'] = $tag;
   $criteria['uid'] = $user->uid;
   $criteria['value_type'] = 'percent'; 
   $votes = votingapi_select_results($criteria);   
      
   if($votes) {
      votingapi_delete_vote(array('vote_id' => $votes[0]->vote_id));
      votingapi_recalculate_results($content_type, $content_id, TRUE);
   }
   
   return voting_service_get_vote( $content_type, $content_id, $tag );
}