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<?php
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//$Id: currency.module,v 1.8 2007/04/08 15:33:35 wafaa Exp $
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// Copyright 2005 Khalid Baheyeldin http://2bits.com
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function currency_help($section) {
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switch ($section) {
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case 'admin/help#currency':
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return t('This module provides currency exchange rates.');
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}
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}
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function currency_menu($may_cache) {
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$items = array();
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if ($may_cache) {
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$items[] = array(
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'path' => 'admin/settings/currency',
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'title' => t('Currency'),
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'description' => t('Settings for currency exchange rates.'),
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'callback' => 'drupal_get_form',
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'callback arguments' => array('currency_admin_settings'),
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'access' => user_access('administer site configuration'),
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'type' => MENU_NORMAL_ITEM, // optional
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);
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$items[] = array(
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'path' => 'currency',
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'title' => t('Currency exchange'),
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'access' => user_access('use currency'),
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'callback' => 'drupal_get_form',
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'callback arguments' => array('currency_form'),
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);
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}
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return $items;
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}
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function currency_admin_settings() {
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$form['currency_default_from'] = array(
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'#type' => 'textfield',
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'#title' => t('Default Currency From'),
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'#default_value' => variable_get('currency_default_from', 'CAD'),
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'#size' => 3,
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'#maxlength' => 3,
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'#description' => t('Three letter symbol for default currency to convert from.'),
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);
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$form['currency_default_to'] = array(
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'#type' => 'textfield',
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'#title' => t('Default Currency To'),
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'#default_value' => variable_get('currency_default_to', 'USD'),
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'#size' => 3,
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'#maxlength' => 3,
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'#description' => t('Three letter symbol for default currency to convert to.'),
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);
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$form['currency_description'] = array(
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'#type' => 'textarea',
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'#title' => t('Description'),
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'#default_value' => variable_get('currency_description', t('This is the currency exchange rate page.')),
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'#cols' => 70,
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'#rows' => 7,
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'#description' => t('This text will be displayed at the top of the currency exchange page'),
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);
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$form['currency_overview_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Navigation link text'),
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'#default_value' => variable_get('currency_overview_title', t('Currency exchange')),
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'#size' => 35,
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'#maxlength' => 255,
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'#description' => t('The text in the navigation link which points to the currency exchange page.'),
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);
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return system_settings_form($form);
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}
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function currency_perm() {
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return array ('use currency');
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}
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function currency_form($data = array()) {
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// Get the saved data from the session, if any
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$amount = $_SESSION['currency_amount'] ? $_SESSION['currency_amount'] : 1;
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$from = $_SESSION['currency_from'] ? $_SESSION['currency_from'] : variable_get('currency_default_from', 'CAD');
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$to = $_SESSION['currency_to'] ? $_SESSION['currency_to'] : variable_get('currency_default_to', 'USD');
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$form['currency_amount'] = array(
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'#type' => 'textfield',
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'#title' => t('Amount'),
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'#default_value' => $amount,
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'#size' => 9,
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'#maxlength' => 9,
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'#description' => t('Amount to convert'),
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);
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$form['currency_from'] = array(
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'#type' => 'select',
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'#title' => t('From'),
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'#default_value' => $from,
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'#options' => currency_api_get_list(),
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);
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$form['currency_to'] = array(
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'#type' => 'select',
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'#title' => t('To'),
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'#default_value' => $to,
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'#options' => currency_api_get_list(),
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);
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$form['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Convert'),
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);
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return $form;
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}
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function currency_form_validate($form_id, $form_values) {
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if (!$form_values['currency_amount']) {
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form_set_error('', t('Amount is required.'));
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}
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if (!is_numeric($form_values['currency_amount'])) {
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form_set_error('', t('Invalid Amount. Please enter a valid numeric amount.'));
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}
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}
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function currency_form_submit($form_id, $form_values) {
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$from = $form_values['currency_from'];
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$to = $form_values['currency_to'];
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$amount = $form_values['currency_amount'];
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$url = 'http://finance.yahoo.com/q?s=' . $from . $to . '=X';
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$ret = currency_api_convert($from, $to, $amount);
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if ($ret['status'] == FALSE) {
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drupal_set_message(t('currency exchange error: ') . $ret['message']);
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}
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else {
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$result .= '<p>';
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$result .= t('@amount @from = @value @to', array(
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'@amount' => $amount,
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'@from' => currency_api_get_desc($from),
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'@value' => $ret['value'],
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'@to' => currency_api_get_desc($to)));
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$result .= '</p><p>';
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$result .= l(t('Detailed history and chart'), $url);
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$result .= '</p>';
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}
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// Save the last used values in the session
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$_SESSION['currency_amount'] = $amount;
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$_SESSION['currency_from'] = $from;
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$_SESSION['currency_to'] = $to;
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drupal_set_message($result);
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}
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