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<?php
function currency_help($section) {
switch ($section) {
case 'admin/help#currency':
return t('This module provides currency exchange rates.');
}
}
function currency_menu($may_cache) {
$items = array();
if ($may_cache) {
$items[] = array(
'path' => 'admin/settings/currency',
'title' => t('Currency'),
'description' => t('Settings for currency exchange rates.'),
'callback' => 'drupal_get_form',
'callback arguments' => array(
'currency_admin_settings',
),
'access' => user_access('administer site configuration'),
'type' => MENU_NORMAL_ITEM,
);
$items[] = array(
'path' => 'currency',
'title' => t('Currency exchange'),
'access' => user_access('use currency'),
'callback' => 'drupal_get_form',
'callback arguments' => array(
'currency_form',
),
);
}
return $items;
}
function currency_admin_settings() {
$form['currency_default_from'] = array(
'#type' => 'textfield',
'#title' => t('Default Currency From'),
'#default_value' => variable_get('currency_default_from', 'CAD'),
'#size' => 3,
'#maxlength' => 3,
'#description' => t('Three letter symbol for default currency to convert from.'),
);
$form['currency_default_to'] = array(
'#type' => 'textfield',
'#title' => t('Default Currency To'),
'#default_value' => variable_get('currency_default_to', 'USD'),
'#size' => 3,
'#maxlength' => 3,
'#description' => t('Three letter symbol for default currency to convert to.'),
);
$form['currency_description'] = array(
'#type' => 'textarea',
'#title' => t('Currency form text'),
'#default_value' => variable_get('currency_description', t('You can use this form to do currency exchange.')),
'#description' => t('Text to display on the top of the currency form.'),
);
return system_settings_form($form);
}
function currency_perm() {
return array(
'use currency',
);
}
function currency_form($data = array()) {
$amount = $_SESSION['currency_amount'] ? $_SESSION['currency_amount'] : 1;
$from = $_SESSION['currency_from'] ? $_SESSION['currency_from'] : variable_get('currency_default_from', 'CAD');
$to = $_SESSION['currency_to'] ? $_SESSION['currency_to'] : variable_get('currency_default_to', 'USD');
$form['currency_description'] = array(
'#value' => variable_get('currency_description', t('You can use this form to do currency exchange.')),
);
$form['currency_amount'] = array(
'#type' => 'textfield',
'#title' => t('Amount'),
'#default_value' => $amount,
'#size' => 9,
'#maxlength' => 9,
'#description' => t('Amount to convert'),
);
$form['currency_from'] = array(
'#type' => 'select',
'#title' => t('From'),
'#default_value' => $from,
'#options' => currency_api_get_list(),
);
$form['currency_to'] = array(
'#type' => 'select',
'#title' => t('To'),
'#default_value' => $to,
'#options' => currency_api_get_list(),
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Convert'),
);
return $form;
}
function currency_form_validate($form_id, $form_values) {
if (!$form_values['currency_amount']) {
form_set_error('', t('Amount is required.'));
}
if (!is_numeric($form_values['currency_amount'])) {
form_set_error('', t('Invalid Amount. Please enter a valid numeric amount.'));
}
}
function currency_form_submit($form_id, $form_values) {
$from = $form_values['currency_from'];
$to = $form_values['currency_to'];
$amount = $form_values['currency_amount'];
$url = 'http://finance.yahoo.com/q?s=' . $from . $to . '=X';
$ret = currency_api_convert($from, $to, $amount);
if ($ret['status'] == FALSE) {
drupal_set_message(t('currency exchange error: ') . $ret['message']);
}
else {
$result .= '<p>';
$result .= t('@amount @from = @value @to', array(
'@amount' => $amount,
'@from' => currency_api_get_desc($from),
'@value' => $ret['value'],
'@to' => currency_api_get_desc($to),
));
$result .= '</p><p>';
$result .= l(t('Detailed history and chart'), $url);
$result .= '</p>';
}
$_SESSION['currency_amount'] = $amount;
$_SESSION['currency_from'] = $from;
$_SESSION['currency_to'] = $to;
drupal_set_message($result);
}
