<?php
// $Id: views_calc.install,v 1.3 2008/09/16 18:03:08 karens Exp $
/**
 * Implementation of hook_schema().
 */
function views_calc_schema() {
  $schema['views_calc_fields'] = array(
    'fields' => array(
      'cid' => array('type' => 'serial', 'not null' => TRUE, 'disp-width' => '10'),
      'label' => array('type' => 'varchar', 'length' => '255', 'not null' => TRUE, 'default' => ''),
      'format' => array('type' => 'varchar', 'length' => '255', 'not null' => TRUE, 'default' => ''),
      'custom' => array('type' => 'varchar', 'length' => '255', 'not null' => TRUE, 'default' => ''),
      'tablelist' => array('type' => 'text', 'not null' => TRUE),
      'fieldlist' => array('type' => 'text', 'not null' => TRUE),
      'calc' => array('type' => 'text', 'not null' => TRUE),
      ),
    'primary key' => array('cid'),
    'indexes' => array(
      'cid' => array('cid'))
  );
  return $schema;
}

function views_calc_install() {
  drupal_install_schema('views_calc');
}

function views_calc_uninstall() {
  db_query("DROP TABLE {views_calc_fields}");
}

/**
 * Convert the queryname stored in the variable to the fullname
 * so we can access both the fieldname and the tablename from
 * the selections.
 *
 * Change the calc 'AVERAGE' to 'AVG' to match the db function.
 */
function views_calc_update_1() {
  $ret = array();
  include_once(drupal_get_path('module', 'views') .'/views.module');
  include_once(drupal_get_path('module', 'views_calc') .'/views_calc.module');
  $view_calcs = (array) variable_get('views_calc_vid','');
  foreach ($view_calcs as $view_id) {
    if ($view = views_get_view($view_id)) {
      $cols = (array) variable_get('views_calc_'. $view->vid .'_col','');
      $new_cols = array();
      foreach ($cols as $col) {
        foreach ($view->field as $field) {
          if ($field['queryname'] == $col) {
            $new_cols[] = $field['fullname'];
          }
        }
      }
      variable_set('views_calc_'. $view->vid .'_col', $new_cols);
      $rows = (array) variable_get('views_calc_'. $view->vid. '_row','');
      $new_rows = array();
      foreach ($rows as $row) {
        foreach ($view->field as $field) {
          if ($field['queryname'] == $col) {
            $new_rows[] = $field['fullname'];
          }
        }
      }
      variable_set('views_calc_'. $view->vid .'_row', $new_rows);
      $col_calc   = (array) variable_get('views_calc_'.$view->vid.'_col_calc','');
      foreach ($col_calc as $calc) {
        if ($calc == 'AVERAGE') {
          $new_calcs[] = 'AVG';
        }
        else {
          $new_calcs[] = $calc;
        }
      }
      variable_set('views_calc_'. $view->vid .'_col_calc', $new_calcs);
      $row_calc   = (array) variable_get('views_calc_'.$view->vid.'_row_calc','');
      foreach ($row_calc as $calc) {
        if ($calc == 'AVERAGE') {
          $new_calcs[] = 'AVG';
        }
        else {
          $new_calcs[] = $calc;
        }
      }
      variable_set('views_calc_'. $view->vid .'_row_calc', $new_calcs);
    }
  }
  return $ret;
}

/**
 * Create a table to store custom views calculation fields.
 */
function views_calc_update_2() {
  $ret = array();
  global $db_type;

  switch ($db_type) {
    case 'mysql':
    case 'mysqli':
      $ret[] = update_sql("CREATE TABLE if not exists {views_calc_fields} (
        cid int(10) unsigned NOT NULL default '0',
        label varchar(255),
        format varchar(255),
        custom varchar(255),
        tablelist text,
        fieldlist text,
        calc text,
        KEY (cid)
      ) /*!40100 DEFAULT CHARACTER SET utf8 */");
      break;
    case 'postgres':
      $ret[] = update_sql("CREATE TABLE if not exists {views_calc_fields} (
        cid int(10) unsigned NOT NULL default '0',
        label varchar(255),
        format varchar(255),
        custom varchar(255),
        tablelist text,
        fieldlist text,
        calc text,
        KEY (cid)
      ) ");
     break;
  }
  return $ret;
}

/**
 * TODO
 * Use these values to create new default views, then delete them.
 *
function views_calc_update_6000() {
  $view_calcs = (array) variable_get('views_calc_vid','');
  foreach ($view_calcs as $view_id) {
    variable_del('views_calc_'. $view_id .'_col');
    variable_del('views_calc_'. $view_id .'_col_calc');
    variable_del('views_calc_'. $view_id .'_row');
    variable_del('views_calc_'. $view_id .'_row_calc');
  }
  variable_del('views_calc_vid');
  variable_del('views_calc_operators');
  
}
 */