<?php

/**
 * @file
 * Admin UI to Notify roles for Workflow state transitions.
 */

/**
 * Settings form.
 */
function workflow_notify_settings_form($form, &$form_state, Workflow $workflow) {
  // If we don't have a workflow that goes with this, return to the admin pg.
  if (!is_object($workflow)) {
    drupal_set_message(t('Improper worklow ID provided.'), 'error');
    drupal_goto(WORKFLOW_ADMIN_UI_PATH);
  }

  // @todo: Let's get a better page title.
  drupal_set_title(t('@name Notifications', array('@name' => $workflow->label())));

  // Let's add some breadcrumbs.
 // workflow_admin_ui_breadcrumbs($workflow);

  $form['#tree'] = TRUE;
  $form['#wid'] = $wid = $workflow->getWorkflowId();
  $form['#workflow'] = $workflow;

  $noyes = array(t('No'), t('Yes'));

  // Get all the states for this workflow, except the (creation) state.
  $states = $workflow->getStates();
  $form['#states'] = $states;
  if (!$states) {
    $form['#columns'] = array();
    $form['error'] = array(
      '#type' => 'markup',
      '#value' => t('There are no states defined for this workflow.'),
    );
    return $form;
  }

  // A list of role names keyed by role ID, including the 'author' role.
  $roles = workflow_get_roles('participate in workflow');
  // The module_invoke_all function does not allow passing by reference.
  $args = array('roles' => $roles);
  foreach (module_implements('workflow_notify') as $module) {
    $function = $module . '_workflow_notify';
    // Call the $op='roles' hooks so the list may be modified.
    $function('roles', $args);
  }
  // Get the modified list.
  $roles = $args['roles'];

  // Setting for "from" address.
  $form['from_address'] = array(
    '#title' => t('Set "From" address to'),
    '#type' => 'radios',
    '#options' => array(
      'site' => t('Site email address'),
      'changer' => t('Current user'),
    ),
    '#default_value' => variable_get("workflow_notify_from_address_$wid", 'site'),
    '#attributes' => array('class' => array('container-inline')),
    '#description' => t('Determines whether to use the site address or the address of the person
        causing the state change.'),
  );

  // Get the list of input formats.
  $formats = array();
  foreach (filter_formats() as $fid => $filter) {
    $formats[$fid] = $filter->name;
  }

  $form['filter'] = array(
    '#title' => t('Filter format to use on message'),
    '#type' => 'radios',
    '#options' => $formats,
    '#default_value' => variable_get("workflow_notify_filter_format_$wid", 'filtered_html'),
    '#attributes' => array('class' => array('container-inline')),
    '#description' => t('The message body will be processed using this filter format
        in order to ensure security.'),
  );

  $form['tokens'] = array(
    '#theme' => 'token_tree_link',
    '#token_types' => array('node', 'workflow'),
  );

  // Column names for theme function.
  $columns = array(
    'state' => t('State'),
    'roles' => t('Roles to notify'),
  );

  $args = array('columns' => $columns);
  // The module_invoke_all function does not allow passing by reference.
  foreach (module_implements('workflow_notify') as $module) {
    $function = $module . '_workflow_notify';
    $function('columns', $args);
  }
  $form['#columns'] = $args['columns'];

  // We always want subject and body last.
  $form['#columns']['subject'] = t('Subject');
  $form['#columns']['body'] = t('Body');

  $notify = variable_get('workflow_notify_roles', array());

  foreach ($states as $sid => $state) {
    // Allow modules to insert state operations.
    $state_links = module_invoke_all('workflow_operations', 'state', $workflow, $state);

    $form['states'][$sid] = array(
      'state' => array(
        '#type' => 'markup',
        '#markup' => filter_xss($state->state),
      ),

      'roles' => array(
        '#type' => 'checkboxes',
        '#options' => $roles,
        '#default_value' => (isset($notify[$sid]) ? $notify[$sid] : array()),
        '#attributes' => array('class' => array('state-roles')),
      ),

      'subject' => array(
        '#type' => 'textarea',
        '#rows' => 5,
        '#default_value' => variable_get('workflow_notify_subject_' . $sid,
          '[node:title] is now "[node:field_workflow_state:new-state:label]"'),
        '#attributes' => array('class' => array('subject')),
      ),

      'body' => array(
        '#type' => 'textarea',
        '#rows' => 5,
        '#default_value' => variable_get('workflow_notify_body_' . $sid,
          '<a href="[node:url:absolute]">[node:title]</a> is now "[node:field_workflow_state:new-state:label]".'),
        '#attributes' => array('class' => array('body')),
      ),
    );
  }

  $form['submit'] = array('#type' => 'submit', '#value' => t('Save configuration'));

  return $form;
}

/**
 * Theme the settings form.
 */
function theme_workflow_notify_settings_form($variables) {
  $form = $variables['form'];
  $output = '';
  $table_id = 'workflow-notify-settings';

  $output .= drupal_render($form['from_address']);
  $output .= drupal_render($form['filter']);
  $output .= drupal_render($form['tokens']);

  $table = array(
    'rows' => array(),
    'header' => array(),    // To be filled in.
    'attributes' => array('id' => $table_id, 'style' => 'width: 100%; margin-top: 1em;'),
  );

  $columns = $form['#columns'];
  $colspan = count($columns);

  foreach ($columns as $field => $title) {
    $table['header'][] = $title;
  }

  // Iterate over each element in our $form['states'] array
  foreach (element_children($form['states']) as $id) {
    // We are now ready to add each element of our $form data to the rows
    // array, so that they end up as individual table cells when rendered
    // in the final table.
    $row = array();

    foreach ($columns as $field => $title) {
      $row[] = array(
        'data' => drupal_render($form['states'][$id][$field]),
        'class' => array(drupal_html_class($field)),
      );
    }

    // Put the data row into the table.
    $table['rows'][] = array('data' => $row);
  }

  $output .= theme('table', $table);

  $output .= drupal_render($form['explain']);

  // And then render any remaining form elements (such as our submit button)
  $output .= drupal_render_children($form);

  return $output;
}

function workflow_notify_settings_form_submit($form, &$form_state) {
  $wid = $form['#wid'];
  $workflow = $form['#workflow'];
  $roles = variable_get('workflow_notify_roles', array());

  $form_state['redirect'] = WORKFLOW_ADMIN_UI_PATH;

  variable_set("workflow_notify_from_address_$wid" , $form_state['values']['from_address']);
  variable_set("workflow_notify_filter_format_$wid" , $form_state['values']['filter']);

  foreach ($form_state['values']['states'] as $sid => $values) {
    $selected = array_filter($values['roles']);
    // Are there any roles selected?
    if ($selected) {
      $roles[$sid] = $selected;
    }
    else {
      // No, so make sure this state is gone.
      unset($roles[$sid]);
    }

    variable_set("workflow_notify_subject_$sid", $values['subject']);
    variable_set("workflow_notify_body_$sid", $values['body']);
  }

  variable_set('workflow_notify_roles', $roles);

  drupal_set_message(t('The notification settings have been saved.'));
}