Create Custom Content type Module with User access and content permission

Create Module info file " job_post.info " :

name = Job post
description = Create custom content type.
core = 7.x
package = Cutom content type(Gajendra Sharma)
files[] = job_post.install
files[] = job_post.module

And, Create Module file " job_post.module " :

function job_post_install() { 
  $t = get_t(); // runs in both the installer and runtime

  /* Create and save a new content object */
  $job_post = 'job_post'; // machine name of the content type

  // define the node type
  $job_post_type = array(
    'type' => $job_post,
    'name' => $t('job_post'),// Display name of the content type
    'base' => 'node_content',
    'title_label' => $t('Title'),
    'description' => $t('To add images and captions.'),
    'custom' => TRUE,
  );

  // set other node defaults not declared above
  $content_type = node_type_set_defaults($job_post_type);

  // add the body field
  node_add_body_field($content_type, $t('Body'));

  // save the content type
  node_type_save($content_type);
}


function job_post_node_info(){
    return array(
        'job_post'=>array(
            'name'=> t('Job Post title'),
            'base'=>'job_post',
            'description'=>t('Create custom content type'),
            'has_title'=>TRUE,
            'title_label'=>t('MY Job Post'),
            'help'=>t('Enter the JOb title and description of the company'),
    
        ),
    );

}

function job_post_permission(){

    return array(
        'create new job post'=>array(
            'title'=>t('create new job post'),
            'description'=>t('create new job post'),),
         'edit own job post'=>array(
            'title'=>t('edit own job post'),
            'description'=>t('edit own job post'),),
         'delete own job post'=>array(
            'title'=>t('delete own job post'),
            'description'=> t('delete own job post'),),
          'delete any job post'=>array(
            'title'=>t('delete any job post'),
            'description'=> t('delete any job post'),),
        
        
    );
    
}


function job_post_form($node , $form_state){
// drupal default provide tile and body fields:
    return node_content_form($node,$form_state);
}


function job_post_node_access($op, $node, $account) {
$is_author = $account->uid == $node->uid;
    switch ($op) {
    case 'create':

        if (user_access('create job', $account)) {
        return NODE_ACCESS_ALLOW;
        }
     

   case 'update':
        if (user_access('edit own job', $account) && $is_author ||
        user_access('edit any job', $account)) {
        return NODE_ACCESS_ALLOW;
        }
 case 'delete':

    if (user_access('delete own job', $account) && $is_author ||
    user_access('delete any job', $account)) {
    return NODE_ACCESS_ALLOW;
    }

    

    }

}