<?php
// $Id: versioncontrol_handler_field_operation_labels.inc,v 1.4 2011-01-28 21:16:59 marvil07 Exp $

/**
 * Views Field handler to show the list of label names this operation is in.
 */
class versioncontrol_handler_field_operation_labels extends views_handler_field {
  public $backends = array();
  public $repos = array();

  /**
   * An array to store operation objects we want its labels to show.
   */
  public $operations = array();

  function construct() {
    parent::construct();
    $this->backends = versioncontrol_get_backends();
  }

  /**
   * Get a repository of the @param $vcs type.
   */
  function getRepository($vcs, $repo_id) {
    if (!isset($this->repos[$repo_id])) {
      $this->repos[$repo_id] = $this->backends[$vcs]->loadEntity('repo', array($repo_id));
    }
    return $this->repos[$repo_id];
  }

  function pre_render($values) {
    parent::pre_render($values);

    // Get all vc_op_ids.
    $vc_op_ids = array();
    $repo_data = array();
    foreach ($values as $result) {
      $vc_op_ids[$result->{$this->aliases['repo_id']}][$result->{$this->field_alias}] = TRUE;
      $repo_data[$result->{$this->aliases['repo_id']}] = $result->{$this->aliases['vcs']};
    }
    $repo_ids = array_keys($repo_data);

    foreach ($repo_ids as $repo_id) {
      $vcs = $repo_data[$repo_id];
      $repository = $this->getRepository($vcs, $repo_id);
      $commit_ids = array_keys($vc_op_ids[$repo_id]);
      if (!empty($commit_ids)) {
        $commits = $repository->loadCommits($commit_ids);
      }
      $this->operations += $commits;
    }
  }

  function render($values) {
    if (!isset($this->operations[$values->{$this->field_alias}])) {
      return '';
    }
    $operation = $this->operations[$values->{$this->field_alias}];
    $label_names = array();
    foreach ($operation->labels as $label) {
      $label_names[] = $label->name;
    }
    return implode(', ', $label_names);
  }

}