[development] AHAH Questions

[Austin Einter]

Hi All
I am quite new to AHAH, strugling to find how it works. I referred
documentation and poll module.
I want 3 fields in a fieldset, *Company, Start-Date, End-Date*.

I have a button "*Add More Company*", if clicked, it should add a new row
having *Company, Start-Date, End-Date *dynamically.
How many times user clicks, those many rows needs to be added.

To get the above mentioned form, I have put the code as below.
However, on button click, new rows are not adding up.

Please help me to find whats the error with code.

Regards,
Austin

Code
===============================================
<?php
function submitresume_menu() {
 $items = array();
 $items['submitresume/form'] = array(
 'title' => t('Submit Your Resume'),
 'page callback' => 'submitresume_form',
 'access arguments' => array('access content'),
 'description' => t('Submit Your Resume'),
 'type' => MENU_CALLBACK,
 );
 $items['submitresume/form/morecompanies'] = array(
 'page callback' => 'submitresume_add_more_companies',
 'access arguments' => array('access content'),
 'type' => MENU_CALLBACK,
 );
 return $items;
}
function submitresume_form() {
 return drupal_get_form('submitresume_my_form');
}
function submitresume_my_form($form_state) {
 $form = array('#cache' => TRUE,);
 if (isset($form_state['all_companies'])) {
  $all_companies = $form_state['all_companies'];
 }
 else {
  $all_companies = 1;
 }
 //Add a wrapper for the companies and add more button.
 $form['work_history_wrapper'] = array(
  '#title' => t("Work history: Mention all the companies you gave worked so
far"),
  '#type' => 'fieldset',
  '#collapsible' => TRUE,
  '#collapsed' => FALSE,
  '#prefix' => '<div class="clear-block" id="work-history-wrapper">',
  '#suffix' => '</div>',
 );
 //Container for just companies
 $form['work_history_wrapper']['allcompanies'] = array(
  '#prefix' => '<div id="all-companies">',
  '#suffix' => '</div>',
 );
 for ($delta = 0; $delta < $all_companies; $delta++)
 {
  //Need to do: Get the company name, start date and end date, pass it to
submitresume_add_one_company_form, so that it is shown properly
  $form['work_history_wrapper']['allcompanies'][$delta] =
submitresume_add_one_company_form($delta, $company_name, $compsdt,
$compedt);
 }
 $form['work_history_wrapper']['morecompany'] = array(
  '#type' => 'button',
  '#value' => t('Add More Companies'),
  '#weight' => 1,
  '#submit' => array('add_more_companies_submit'), // If no javascript
action.
  '#ahah' => array(
   'path' => 'submitresume/form/morecompanies',
   'wrapper' => 'all-companies',
   'method' => 'replace',
   'effect' => 'fade',
  ),
 );

$form['submit'] = array(
'#type' => 'submit',
'#value' => 'Submit',
);
return $form;
}
function submitresume_add_one_company_form($delta, $company_name, $compsdt,
$compedt) {
 $form = array(
  '#tree' => TRUE,
 );
 $form['companies'] = array(
  '#type' => 'textfield',
  '#title' => t('Company')."-".$delta,
  '#parents' => array('allcompanies', $delta, 'companies'),
  '#size' => 30,
  '#maxlength' => 100,
 );
 $form['startdate'] = array(
  '#type' => 'date',
  '#title' => t('Start Date'),
  '#parents' => array('allcompanies', $delta, 'startdate'),
 );
 $form['enddate'] = array(
  '#type' => 'date',
  '#title' => t('End Date'),
  '#parents' => array('allcompanies', $delta, 'enddate'),
 );
 return $form;
}

function add_more_companies_submit($form, &$form_state) {
 // Set the form to rebuild and run submit handlers.
 node_form_submit_build_node($form, $form_state);
 // Make the changes we want to the form state.
 if ($form_state['values']['morecompany']) {
  $n = $_GET['q'] == 'submitresume/form/morecompanies' ? 1 : 5;
  $form_state['all_companies'] =
count($form_state['values']['allcompanies']) + $n;
 }
}
function  submitresume_add_more_companies() {
 include_once 'modules/node/node.pages.inc';
 $form_state = array('storage' => NULL, 'submitted' => FALSE);
 $form_build_id = $_POST['form_build_id'];
 // Get the form from the cache.
 $form = form_get_cache($form_build_id, $form_state);
 $args = $form['#parameters'];
 $form_id = array_shift($args);
 // We will run some of the submit handlers so we need to disable
redirecting.
 $form['#redirect'] = FALSE;
 // We need to process the form, prepare for that by setting a few internals
 // variables.
 $form['#post'] = $_POST;
 $form['#programmed'] = FALSE;
 $form_state['post'] = $_POST;
 // Build, validate and if possible, submit the form.
 drupal_process_form($form_id, $form, $form_state);
 // This call recreates the form relying solely on the form_state that the
 // drupal_process_form set up.
 $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);
 // Render the new output.
 $choice_form = $form['work_history_wrapper']['allcompanies'];
 unset($choice_form['#prefix'], $choice_form['#suffix']); // Prevent
duplicate wrappers.
 $output = theme('status_messages') . drupal_render($choice_form);
 drupal_json(array('status' => TRUE, 'data' => $output));
}
function submitresume_validate($form, &$form_state) {
}
function submitresume_submit($form, &$form_state) {
drupal_set_message(t('The form has been submitted.'));
}
?>
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