<?php
// $Id$

/**
 * @file
 * Support for configurable user profiles.
 */

/**
 * Flags to define the visibility of a profile field.
 */
define('PROFILE_PRIVATE', 1);
define('PROFILE_PUBLIC', 2);
define('PROFILE_PUBLIC_LISTINGS', 3);

/**
 * Implementation of hook_help().
 */
function profile_help($section) {
  switch ($section) {
    case 'admin/modules#description':
      return t('Supports configurable user profiles.');
    case 'admin/settings/profile':
      return t('<p>Here you can define custom fields that users can fill in in their user profile (such as <em>country</em>, <em>real name</em>, <em>age</em>, ...).</p>');
  }
}

/**
 * Implementation of hook_menu().
 */
function profile_menu($may_cache) {
  global $user;
  $items = array();

  if ($may_cache) {
    $items[] = array('path' => 'profile', 'title' => t('user list'),
      'callback' => 'profile_browse',
      'access' => user_access('access user profiles'),
      'type' => MENU_SUGGESTED_ITEM);
    $items[] = array('path' => 'admin/settings/profile', 'title' => t('profiles'),
      'callback' => 'profile_admin_overview',
      'access' => user_access('administer users'));
    $items[] = array('path' => 'admin/settings/profile/add', 'title' => t('add field'),
      'callback' => 'profile_admin_add',
      'access' => user_access('administer users'),
      'type' => MENU_CALLBACK);
    $items[] = array('path' => 'admin/settings/profile/edit', 'title' => t('edit field'),
      'callback' => 'profile_admin_edit',
      'access' => user_access('administer users'),
      'type' => MENU_CALLBACK);
    $items[] = array('path' => 'admin/settings/profile/delete', 'title' => t('delete field'),
      'callback' => 'profile_admin_delete',
      'access' => user_access('administer users'),
      'type' => MENU_CALLBACK);
  }

  return $items;
}

/**
 * Menu callback; display a list of user information.
 */
function profile_browse() {

  $name = arg(1);
  $value = arg(2);

  $field = db_fetch_object(db_query("SELECT DISTINCT(fid), type, title, page, visibility FROM {profile_fields} WHERE name = '%s'", $name));

  if ($name && $field->fid) {
    // Do not allow browsing of private fields by non-admins
    if (!user_access('administer users') && $field->visibility == PROFILE_PRIVATE) {
       drupal_access_denied();
       return;
    }

    // Compile a list of fields to show
    $fields = array();
    $result = db_query('SELECT name, title, type FROM {profile_fields} WHERE fid != %d AND visibility = %d ORDER BY weight', $field->fid, PROFILE_PUBLIC_LISTINGS);
    while ($record = db_fetch_object($result)) {
      $fields[] = $record;
    }

    // Determine what query to use:
    switch ($field->type) {
      case 'checkbox':
        $query = 'v.value = 1';
        break;
      case 'selection':
        $query = "v.value = '". db_escape_string($value) ."'";
        break;
      case 'list':
        $query = "v.value LIKE '%%". db_escape_string($value) ."%%'";
        break;
      default:
        drupal_not_found();
        return;
    }

    // Extract the affected users:
    $result = pager_query("SELECT u.uid FROM {users} u INNER JOIN {profile_values} v ON u.uid = v.uid WHERE v.fid = %d AND $query ORDER BY u.changed DESC", 20, 0, NULL, $field->fid);

    $output = '<div id="profile">';
    while ($account = db_fetch_object($result)) {
      $output .= theme('profile_profile', user_load(array('uid' => $account->uid)), $fields);
    }
    $output .= theme('pager', NULL, 20);

    if ($field->type == 'selection' || $field->type == 'list') {
      $title = strtr($field->page, array('%value' => theme('placeholder', $value)));
    }
    else {
      $title = $field->page;
    }
    $output .= '</div>';

    drupal_set_title($title);
    print theme('page', $output);
  }
  else if ($name && !$field->id) {
    drupal_not_found();
  }
  else {
    // Compile a list of fields to show
    $fields = array();
    $result = db_query('SELECT name, title, type FROM {profile_fields} WHERE visibility = %d', PROFILE_PUBLIC_LISTINGS);
    while ($record = db_fetch_object($result)) {
      $fields[] = $record;
    }

    // Extract the affected users:
    $result = pager_query("SELECT uid FROM {users} WHERE uid > 0 ORDER BY changed DESC", 20, 0, NULL);

    $output = '<div id="profile">';
    while ($account = db_fetch_object($result)) {
      $output .= theme('profile_profile', user_load(array('uid' => $account->uid)), $fields);
    }
    $output .= '</div>';
    $output .= theme('pager', NULL, 20);

    drupal_set_title(t('user list'));
    print theme('page', $output);
  }
}

function profile_load_profile(&$user) {
  $result = db_query('SELECT f.name, f.type, v.value FROM {profile_fields} f INNER JOIN {profile_values} v ON f.fid = v.fid WHERE uid = %d', $user->uid);
  while ($field = db_fetch_object($result)) {
    if (empty($user->{$field->name})) {
      $user->{$field->name} = _profile_field_serialize($field->type) ? unserialize($field->value) : $field->value;
    }
  }
}

function profile_save_profile(&$edit, &$user, $category) {
  if (($_GET['q'] == 'user/register') ? 1 : 0) {
    $result = db_query('SELECT fid, name, type FROM {profile_fields} WHERE register = 1 ORDER BY category, weight');
  }
  else {
    $result = db_query("SELECT fid, name, type FROM {profile_fields} WHERE LOWER(category) = LOWER('%s')", $category);
    // We use LOWER('%s') instead of PHP's strtolower() to avoid UTF-8 conversion issues.
  }
  while ($field = db_fetch_object($result)) {
    if (_profile_field_serialize($field->type)) {
       $edit[$field->name] = serialize($edit[$field->name]);
    }
    db_query("DELETE FROM {profile_values} WHERE fid = %d AND uid = %d", $field->fid, $user->uid);
    db_query("INSERT INTO {profile_values} (fid, uid, value) VALUES (%d, %d, '%s')", $field->fid, $user->uid, $edit[$field->name]);
    // Mark field as handled (prevents saving to user->data).
    $edit[$field->name] = null;
  }
}

function profile_view_field($user, $field) {
  // Only allow browsing of private fields for admins
  $browse = user_access('administer users') || $field->visibility != PROFILE_PRIVATE;

  if ($value = $user->{$field->name}) {
    switch ($field->type) {
      case 'textfield':
        return check_plain($value);
      case 'textarea':
        return check_output($value);
      case 'selection':
        return $browse ? l($value, "profile/$field->name/$value") : check_plain($value);
      case 'checkbox':
        return $browse ? l($field->title, "profile/$field->name") : check_plain($field->title);
      case 'url':
        return '<a href="'. check_url($value) .'">'. check_plain($value) .'</a>';
      case 'date':
        list($format) = explode(' - ', variable_get('date_format_short', 'm/d/Y - H:i'), 2);
        // Note: we avoid PHP's date() because it does not handle dates before
        // 1970 on Windows. This would make the date field useless for e.g.
        // birthdays.
        $replace = array('d' => sprintf('%02d', $value['day']),
                         'j' => $value['day'],
                         'm' => sprintf('%02d', $value['month']),
                         'M' => _profile_map_month($value['month']),
                         'Y' => $value['year']);
        return strtr($format, $replace);
      case 'list':
        $values = split("[,\n\r]", $value);
        $fields = array();
        foreach ($values as $value) {
          if ($value = trim($value)) {
            $fields[] = $browse ? l($value, "profile/". urlencode($field->name) ."/". urlencode($value)) : check_plain($value);
          }
        }
        return implode(', ', $fields);
    }
  }
}

function profile_view_profile($user) {

  profile_load_profile($user);

  // Show private fields to administrators and people viewing their own account.
  if (user_access('administer users') || $GLOBALS['user']->uid == $user->uid) {
    $result = db_query('SELECT * FROM {profile_fields} ORDER BY category, weight');
  }
  else {
    $result = db_query('SELECT * FROM {profile_fields} WHERE visibility != %d ORDER BY category, weight', PROFILE_PRIVATE);
  }

  while ($field = db_fetch_object($result)) {
    if ($value = profile_view_field($user, $field)) {
      $description = ($field->visibility == PROFILE_PRIVATE) ? t('The content of this field is private and only visible to yourself.') : '';
      $title = ($field->type != 'checkbox') ? check_plain($field->title) : '';
      $fields[$field->category] .= form_item($title, $value, $description);
    }
  }

  return $fields;
}

function _profile_form_explanation($field) {
  $output = $field->explanation;

  if ($field->type == 'list') {
    $output .= ' '. t('Put each item on a separate line or separate them by commas.  No HTML allowed.');
  }

  if ($field->visibility == PROFILE_PRIVATE) {
    $output .= ' '. t('The content of this field is kept private and will not be shown publicly.');
  }

  return $output;
}

function profile_form_profile($edit, $user, $category) {

  if (($_GET['q'] == 'user/register') ? 1 : 0) {
    $result = db_query('SELECT * FROM {profile_fields} WHERE register = 1 ORDER BY category, weight');
  }
  else {
    $result = db_query("SELECT * FROM {profile_fields} WHERE LOWER(category) = LOWER('%s') ORDER BY weight", $category);
    // We use LOWER('%s') instead of PHP's strtolower() to avoid UTF-8 conversion issues.
  }

  $fields = array();
  while ($field = db_fetch_object($result)) {
    $category = $field->category;
    switch ($field->type) {
      case 'textfield':
      case 'url':
        $fields[$category] .= form_textfield(check_plain($field->title), $field->name, $edit[$field->name], 70, 255, _profile_form_explanation($field), NULL, $field->required);
        break;
      case 'textarea':
        $fields[$category] .= form_textarea(check_plain($field->title), $field->name, $edit[$field->name], 70, 5, _profile_form_explanation($field), NULL, $field->required);
        break;
      case 'list':
        $fields[$category] .= form_textarea(check_plain($field->title), $field->name, $edit[$field->name], 70, 5, _profile_form_explanation($field), NULL, $field->required);
        break;
      case 'checkbox':
        $fields[$category] .= form_checkbox(check_plain($field->title), $field->name, 1, $edit[$field->name], _profile_form_explanation($field), NULL, $field->required);
        break;
      case 'selection':
        $options = array('--');
        $lines = split("[,\n\r]", $field->options);
        foreach ($lines as $line) {
          if ($line = trim($line)) {
            $options[$line] = $line;
          }
        }

        $fields[$category] .= form_select(check_plain($field->title), $field->name, $edit[$field->name], $options, _profile_form_explanation($field), 0, 0, $field->required);
        break;
      case 'date':
        $fields[$category] .= _profile_date_field($field, $edit);
        break;
    }
  }

  if ($fields) {
    foreach ($fields as $category => $data) {
      $output[] = array('title' => $category, 'data' => $data);
    }
    return $output;
  }
}

/**
 * Helper function: output a date selector
 */
function _profile_date_field($field, $edit) {
  // Default to current date
  if (!isset($edit[$field->name])) {
    $edit[$field->name] = array('day' => format_date(time(), 'custom', 'j'),
                                'month' => format_date(time(), 'custom', 'n'),
                                'year' => format_date(time(), 'custom', 'Y'));
  }

  // Determine the order of day, month, year in the site's chosen date format.
  $format = variable_get('date_format_short', 'm/d/Y');
  $sort = array();
  $sort['day'] = max(strpos($format, 'd'), strpos($format, 'j'));
  $sort['month'] = max(strpos($format, 'm'), strpos($format, 'M'));
  $sort['year'] = strpos($format, 'Y');
  asort($sort);
  $order = array_keys($sort);

  // Output multi-selector for date
  $output = '<div class="container-inline">';
  foreach ($order as $type) {
    switch ($type) {
      case 'day':
        $options = drupal_map_assoc(range(1, 31));
        break;
      case 'month':
        $options = drupal_map_assoc(range(1, 12), '_profile_map_month');
        break;
      case 'year':
        $options = drupal_map_assoc(range(1900, 2050));
        break;
    }
    $output .= form_select('', $field->name .']['. $type, $edit[$field->name][$type], $options, '', 0, 0);
  }
  $output .= '</div>';

  return form_item(check_plain($field->title), $output, _profile_form_explanation($field), NULL, $field->required);
}

/**
 * Helper function for usage with drupal_map_assoc
 */
function _profile_map_month($month) {
  return format_date(gmmktime(0, 0, 0, $month, 2, 1970), 'custom', 'M', 0);
}

function profile_validate_profile($edit, $category) {

  if (($_GET['q'] == 'user/register') ? 1 : 0) {
    $result = db_query('SELECT * FROM {profile_fields} WHERE register = 1 ORDER BY category, weight');
  }
  else {
    $result = db_query("SELECT * FROM {profile_fields} WHERE LOWER(category) = LOWER('%s') ORDER BY weight", $category);
    // We use LOWER('%s') instead of PHP's strtolower() to avoid UTF-8 conversion issues.
  }

  while ($field = db_fetch_object($result)) {
    if ($edit[$field->name]) {
      if ($field->type == 'url') {
        if (!valid_url($edit[$field->name], true)) {
          form_set_error($field->name, t('The value provided for %field is not a valid URL.', array('%field' => theme('placeholder', $field->title))));
        }
      }
    }
    else if ($field->required && !user_access('administer users')) {
      form_set_error($field->name, t('The field %field is required.', array('%field' => theme('placeholder', $field->title))));
    }
  }

  return $edit;
}

function profile_categories() {
  $result = db_query("SELECT DISTINCT(category) FROM {profile_fields}");
  while ($category = db_fetch_object($result)) {
    $data[] = array('name' => check_plain($category->category), 'title' => $category->category, 'weight' => 3);
  }
  return $data;
}

/**
 * Implementation of hook_user().
 */
function profile_user($type, &$edit, &$user, $category = NULL) {
  switch ($type) {
    case 'load':
      return profile_load_profile($user);
    case 'register':
      return profile_form_profile($edit, $user, $category);
    case 'update':
    case 'insert':
      return profile_save_profile($edit, $user, $category);
    case 'view':
      return profile_view_profile($user);
    case 'form':
      return profile_form_profile($edit, $user, $category);
    case 'validate':
      return profile_validate_profile($edit, $category);
    case 'categories':
      return profile_categories();
  }
}

function profile_validate_form($edit) {

  // Validate the title:

  if (!$edit['title']) {
    form_set_error('title', t('You must enter a title.'));
  }

  // Validate the 'form name':

  if (eregi('[^a-z0-9_-]', $edit['name'])) {
    form_set_error('name', t('The specified form name contains one or more illegal characters.  Spaces or any other special characters expect dash (-) and underscore (_) are not allowed.'));
  }

  if (in_array($edit['name'], user_fields())) {
    form_set_error('name', t('The specified form name is reserved for use by Drupal.'));
  }

  // Validate the category:
  if (!$edit['category']) {
    form_set_error('category', t('You must enter a category.'));
  }
}

/**
 * Menu callback; adds a new field to all user profiles.
 */
function profile_admin_add($type) {
  if ($_POST['op']) {
    $data = $_POST['edit'];

    // Validate the form:
    profile_validate_form($data);

    if (db_result(db_query("SELECT fid FROM {profile_fields} WHERE title = '%s' AND category = '%s'", $data['title'], $data['category']))) {
      form_set_error('title', t('The specified title is already in use.'));
    }

    if (db_result(db_query("SELECT fid FROM {profile_fields} WHERE name = '%s'", $data['name']))) {
      form_set_error('name', t('The specified name is already in use.'));
    }

    if (!form_get_errors()) {
      db_query("INSERT INTO {profile_fields} (title, name, explanation, category, type, weight, required, register, visibility, options, page) VALUES ('%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d, '%s', '%s')", $data['title'], $data['name'], $data['explanation'], $data['category'], $type, $data['weight'], $data['required'], $data['register'], $data['visibility'], $data['options'], $data['page']);

      cache_clear_all();

      drupal_set_message(t('The field has been created.'));
      drupal_goto('admin/settings/profile');
    }
  }
  else {
    $data = array('name' => 'profile_');
  }

  drupal_set_title(t('Add new %type', array('%type' => _profile_field_types($type))));
  print theme('page', _profile_field_form($type, $data));
}

/**
 * Menu callback; displays the profile field editing form.
 */
function profile_admin_edit($fid) {

  if ($_POST['op']) {
    $data = $_POST['edit'];

    // Validate form:
    profile_validate_form($data);

    if (!form_get_errors()) {
      db_query("UPDATE {profile_fields} SET title = '%s', name = '%s', explanation = '%s', category = '%s', weight = %d, required = %d, register = %d, visibility = %d, options = '%s', page = '%s' WHERE fid = %d", $data['title'], $data['name'], $data['explanation'], $data['category'], $data['weight'], $data['required'], $data['register'], $data['visibility'], $data['options'], $data['page'], $fid);

      cache_clear_all();

      drupal_set_message(t('The field has been updated.'));
      drupal_goto('admin/settings/profile');
    }
  }
  else {
    $data = db_fetch_array(db_query('SELECT * FROM {profile_fields} WHERE fid = %d', $fid));
  }

  drupal_set_title(t('Edit %type', array('%type' => $data['type'])));
  print theme('page', _profile_field_form($data['type'], $data));
}

/**
 * Menu callback; deletes a field from all user profiles.
 */
function profile_admin_delete($fid) {
  db_query('DELETE FROM {profile_fields} WHERE fid = %d', $fid);

  cache_clear_all();

  drupal_set_message(t('The field has been deleted.'));
  drupal_goto('admin/settings/profile');
}

function _profile_field_form($type, $edit = array()) {

  $group  = form_textfield(t('Category'), 'category', $edit['category'], 70, 128, t('The category the new field should be part of.  Categories are used to group fields logically.  An example category is "Personal information".'));
  $group .= form_textfield(t('Title'), 'title', $edit['title'], 70, 128, t('The title of the new field.  The title will be shown to the user.  An example title is "Favorite color".'));
  $group .= form_textfield(t('Form name'), 'name', $edit['name'], 70, 128, t('The name of the field.  The form name is not shown to the user but used internally in the HTML code and URLs.
Unless you know what you are doing, it is highly recommended that you prefix the form name with <code>profile_</code> to avoid name clashes with other fields.  Spaces or any other special characters except dash (-) and underscore (_) are not allowed. An example name is "profile_favorite_color" or perhaps just "profile_color".'));
  $group .= form_textarea(t('Explanation'), 'explanation', $edit['explanation'], 70, 3, t('An optional explanation to go with the new field.  The explanation will be shown to the user.'));
  if ($type == 'selection') {
    $group .= form_textarea(t('Selection options'), 'options', $edit['options'], 70, 8, t('A list of all options.  Put each option on a separate line.  Example options are "red", "blue", "green", etc.'));
  }
  $group .= form_weight(t('Weight'), 'weight', $edit['weight'], 5, t('The weights define the order in which the form fields are shown.  Lighter fields "float up" towards the top of the category.'));
  $group .= form_radios(t('Visibility'), 'visibility', $edit['visibility'], array(PROFILE_PRIVATE => t('Private field, content only available to privileged users.'), PROFILE_PUBLIC => t('Public field, content shown on profile page but not used on member list pages.'), PROFILE_PUBLIC_LISTINGS => t('Public field, content shown on profile page and on member list pages.')));
  if ($type == 'selection' || $type == 'list') {
    $group .= form_textfield(t('Page title'), 'page', $edit['page'], 70, 128, t('The title of the page showing all users with the specified field.  The word <code>%value</code> will be substituted with the corresponding value.  An example page title is "People whose favorite color is %value".  Only applicable if the field is configured to be shown on member list pages.'));
  }
  else {
    $group .= form_textfield(t('Page title'), 'page', $edit['page'], 70, 128, t('The title of the page showing all users with the specified field.  Only applicable if the field is configured to be shown on member listings.'));
  }
  $group .= form_checkbox(t('The user must enter a value.'), 'required', 1, $edit['required']);
  $group .= form_checkbox(t('Visible in user registration form.'), 'register', 1, $edit['register']);

  $output  = form_group(t('Field settings'), $group);
  $output .= form_submit(t('Save field'));

  return form($output);
}

/**
 * Menu callback; display a listing of all editable profile fields.
 */
function profile_admin_overview() {

  $result = db_query('SELECT * FROM {profile_fields} ORDER BY category, weight');
  $rows = array();
  while ($field = db_fetch_object($result)) {
    $rows[] = array(check_plain($field->title), $field->name, _profile_field_types($field->type), $field->category, l(t('edit'), "admin/settings/profile/edit/$field->fid"), l(t('delete'), "admin/settings/profile/delete/$field->fid"));
  }
  if (count($rows) == 0) {
    $rows[] = array(array('data' => t('No fields defined.'), 'colspan' => '6'));
  }

  $header = array(t('Title'), t('Name'), t('Type'), t('Category'), array('data' => t('Operations'), 'colspan' => '2'));

  $output  = theme('table', $header, $rows);
  $output .= '<h2>'. t('Add new field') .'</h2>';
  $output .= '<ul>';
  foreach (_profile_field_types() as $key => $value) {
    $output .= '<li>'. l($value, "admin/settings/profile/add/$key") .'</li>';
  }
  $output .= '</ul>';

  print theme('page', $output);
}

function theme_profile_profile($user, $fields = array()) {

  $output  = "<div class=\"profile\">\n";
  $output .= theme('user_picture', $user);
  $output .= ' <div class="name">'. format_name($user) ."</div>\n";

  foreach ($fields as $field) {
    if ($value = profile_view_field($user, $field)) {
      $output .= " <div class=\"field\">$value</div>\n";
    }
  }

  $output .= "</div>\n";

  return $output;
}

function _profile_field_types($type = NULL) {
  $types = array('textfield' => t('single-line textfield'),
                 'textarea' => t('multi-line textfield'),
                 'checkbox' => t('checkbox'),
                 'selection' => t('list selection'),
                 'list' => t('freeform list'),
                 'url' => t('URL'),
                 'date' => t('date'));
  return isset($type) ? $types[$type] : $types;
}

function _profile_field_serialize($type = NULL) {
  return $type == 'date';
}

?>