stockapi.module

<?php

/**
 * @file
 *  API for retrieving stock information from Alpha Vantage.
 */
// TODO: Add historical data option.
// TODO: Updates to default stockapi symbols


use Drupal\Core\Link;
use Drupal\Core\Url;
use Drupal\Component\Utility\Unicode;
use Drupal\Component\Render\FormattableMarkup;


module_load_include('inc', 'stockapi');


/**
 * Implements hook_cron().
 */
function stockapi_cron() {
  if (REQUEST_TIME - \Drupal::config('stockapi.settings')->get('stockapi_fetch_last') >= \Drupal::config('stockapi.settings')->get('stockapi_fetch')) {
    if (intval(\Drupal::config('stockapi.settings')->get('stockapi_fetch_first')) < 1) {
      stockapi_fetch_symbols();
    }
    else {

      $symbols = array();
      $result = db_query('SELECT symbol FROM {stockapi} ORDER BY updated');
      if (count($result)) {
    foreach ($result as $data) {
      $symbols[] = $data->symbol;
    }
      }

      $default_symbols = \Drupal::config('stockapi.settings')->get('stockapi_default_symbols');
      if (\Drupal\Component\Utility\Unicode::strlen($default_symbols)) {
        $default_symbols_array = explode(' ', $default_symbols);
        $symbols = array_unique(array_merge($default_symbols_array, $symbols));
      }

      if (count($symbols)) {
    $stocks = stockapi_fetch($symbols);
    foreach ($stocks as $key => $stock) {
      stockapi_save(_stockapi_to_object($stock));
    }
    \Drupal::moduleHandler()->invokeAll('stockapi_post_update', [$stocks]);
    \Drupal::configFactory()->getEditable('stockapi.settings')->set('stockapi_fetch_last', REQUEST_TIME)->save();

    \Drupal::cache()->delete('variables');
  }
}
  }
}

/**
 *  Create the basic StockAPI page.
 */
function stockapi_fetch_symbols() {
  if (intval(\Drupal::config('stockapi.settings')->get('stockapi_fetch_first')) < 1) {
    $symbols = array();
    $default_symbols = \Drupal::config('stockapi.settings')->get('stockapi_default_symbols');
    if (\Drupal\Component\Utility\Unicode::strlen($default_symbols)) {
      $symbols = explode(' ', $default_symbols);
    }
    if (!count($symbols)) {
      $symbols = stockapi_get_default_symbols();
    }
    $stocks = stockapi_fetch($symbols);
    foreach ($stocks as $stock) {
      $stock = _stockapi_to_object($stock);
      stockapi_save($stock);
    }
    \Drupal::moduleHandler()->invokeAll('stockapi_post_update', [$stocks]);
    \Drupal::configFactory()->getEditable('stockapi.settings')->set('stockapi_fetch_first', REQUEST_TIME)->save();
    \Drupal::logger('stockapi')->notice(sprintf("Stock API has successfully loaded all default symbols: %s", strftime('Y-m-d H:i:s', REQUEST_TIME)), []);
  }
}


/**
 * Generate link to full quote for the stock sybol
 *
 * @param string $field
 * @return string
 */
function stockapi_format_symbol($field, $title = '', $exchange = NULL) {
  if (empty($exchange)) {
    $result = db_query("SELECT exchange FROM {stockapi} WHERE symbol = :symbol", array(':symbol' => $field))->fetchField();
    if (empty($result)) {
      $exchange = 'TSE';
    }
    else {
      $exchange = $result;
    }
  }
  switch ($exchange) {
    case 'NYSE':
      $exchange = 'NYSE';
    break;
    case 'TSE':
      $exchange = 'TSE';
    break;
    case 'Toronto Stock Exchange':
      $exchange = 'TSE';
    break;
    case 'New York Stock Exchange':
      $exchange = 'NYSE';
    break;
    case 'NASDAQ':
      $exchange = 'NASDAQ';
    break;
    case '':
      $exchange = 'TSE';
    break;
    case NULL:
      $exchange = 'TSE';
    break;
    default:
      $exchange = 'TSE';
    break;
  }

  $options = ['query' => ['q' => $exchange . ':' . $field], 'attributes' => ['target' => '_blank', 'title' => (Unicode::strlen($title)) ? $title : $field]];
  $url = Url::fromUri('http://finance.google.com/finance', $options);
  $link = Link::fromTextAndUrl(Unicode::strtoupper($field), $url);
  return $link;
}

/**
 * Right-align data in the table cell
 *
 * @param string $field
 * @return string
 */
function stockapi_format_align($field) {
  return new FormattableMarkup('<span align="right">' . $field .'</span>', ['@field' => '$field']);
}

/**
 * Format decimals
 *
 * @param string $field
 * @return double
 */
function stockapi_format_decimals($field) {
  return number_format(doubleval($field), \Drupal::config('stockapi.settings')->get('stockapi_decimals'));
}

/**
 * Style the quote to show whether there's been an upward or downward trend
 * on the stock quote
 *
 * @param string $field
 * @return string
 */
function stockapi_format_change($field) {
  // Add a style for the change field, so we can
  // add color, up tick/down tick, ...etc.
  $style = 'plus';
  if ($field < 0) {
    $style = 'minus';
  }
  return new FormattableMarkup('<span class="' . $style . '">' . $field . '</span>', ['@field' => '$field']);     
}