<?php 
// $Id: annotate.module,v 1.5 2007/06/22 08:04:34 kermit Exp $ 
/** 
 * @file 
 * Lets users add private annotations to nodes. 
 * Currently only allows 1 annotation per node.
 * Variables are now saved to the variable database.
 * Adds a text field when a node is displayed 
 * so that authenticated users may make notes. 
 */ 

/** 
 * Implementation of hook_menu(). 
 */ 
function annotate_menu($may_cache) { 
  $items = array(); 
  if ($may_cache) { 
    $items[] = array( 
      'path' => 'admin/annotate', 
      'title' => t('Node annotation'), 
      'description' => t('Adjust node annotation options.'), 
      'position' => 'right', 
      'weight' => -5, 
      'callback' => 'system_admin_menu_block_page', 
      'access' => user_access('administer site configuration') 
    ); 
    $items[] = array( 
      'path' => 'admin/annotate/settings',
      'title' => t('Annotation settings'), 
      'description' => t('Change how annotations behave.'), 
      'callback' => 'drupal_get_form', 
      'callback arguments' => array('annotate_admin_settings'), 
      'access' => user_access('administer site configuration') 
    ); 
  } 
  return $items; 
}

/** 
 * Define the settings form. 
 */ 
function annotate_admin_settings() { 
/* original code: */
/*  $form['annotate_nodetypes'] = array( 
    '#type' => 'checkboxes', 
    '#title' => t('Users may annotate these node types'), 
    '#options' => node_get_types('names'), 
    '#default_value' => variable_get('annotate_nodetype_', array('story')), 
    '#description' => t('A text field will be available on these node types to make user-specific notes.'), 
  );
*/

/**
************ Changed to: ******************
*/
	/* we don't store these nodetypes in an array but in single variables as nodeprofile does. */
  $form['annotate_nodetypes'] = array(
    '#type' => 'fieldset',
    '#title' => t('Users may annotate these node types'),
    '#description' => t('A text field will be available on these node types to make user-specific notes.'), 
  );

  foreach(node_get_types() as $type => $name) {
    $form['annotate_nodetypes']['annotate_nodetype_' . $type] = array(
      '#type' => 'checkbox',
      '#title' => $type,
      '#return_value' => 1,
      '#default_value' => variable_get('annotate_nodetype_' . $type, 0),
    );
  }
	/**
	************ End of change. ******************
	*/	
  
  $form['annotate_deletion'] = array( 
    '#type' => 'radios', 
    '#title' => t('Annotations will be deleted'), 
    '#description' => t('Select a method for deleting annotations.'), 
    '#options' => array( 
      t('Never'), 
      t('Randomly'), 
      t('After 30 days') 
    ), 
    '#default_value' => variable_get('annotate_deletion', 0) // default to Never 
  );
  
  $form['annotate_limit_per_node'] = array( 
    '#type' => 'textfield', 
    '#title' => t('Annotations per node'), 
    '#description' => t('Enter the maximum number of annotations allowed per node (0 for no limit).'), 
    '#default_value' => variable_get('annotate_limit_per_node', 1), 
    '#size' => 3 
  );
  
  // Retrieve stored variables in the settings form.
  $max = variable_get('annotate_limit_per_node', 1);
  $max = variable_get('annotate_deletion', 0);
  
  // Define a validation function. 
  $form['#validate'] = array( 
    'annotate_admin_settings_validate' => array() 
  );
  return system_settings_form($form); 
}

// Validate the settings form. 
function annotate_admin_settings_validate($form_id, $form_values) { 
  if (!is_numeric($form_values['annotate_limit_per_node'])) { 
    form_set_error('annotate_limit_per_node', t('Please enter a number.')); 
  } 
} 


/** 
 * Implementation of hook_nodeapi(). 
 */ 
function annotate_nodeapi(&$node, $op, $teaser, $page) { 
  switch ($op) { 
    case 'view': 
      global $user; 
      // If only the node summary is being displayed, or if the 
      // user is an anonymous user (not logged in), abort.
      if ($teaser || $user->uid == 0) { 
        break; 
      } 

			/* original code */
			/*			if (!in_array($node->type, $types_to_annotate)) { 
			        break; 
			      } 

			      // Get previously saved note, if any. 
			      $result = db_query("SELECT note FROM {annotations} WHERE uid = %d AND nid = %d", $user->uid, $node->nid); 
			      $node->annotation = db_result($result); 

			      // Add our form as a content item.
			      $node->content['annotate_form'] = array( 
			        '#value' => drupal_get_form('annotate_entry_form', $node), 
			        '#weight' => 10 
			      );   
			*/
			
			/**
			************ Changed ******************
			*/
      $type_to_annotate = variable_get('annotate_nodetype_' . $type, array('story')); 
			if(!is_annotatetype($node)) { 
					break; 
			} else {
	      // Get previously saved note, if any. 
	      $result = db_query("SELECT note FROM {annotations} WHERE uid = %d AND nid = %d", $user->uid, $node->nid); 
	      $node->annotation = db_result($result); 
      
	      // Add our form as a content item.
	      $node->content['annotate_form'] = array( 
	        '#value' => drupal_get_form('annotate_entry_form', $node), 
	        '#weight' => 10 
	      );
			}   
			/**
			************ End of change ******************
			*/ 
  } 
} 


/**
************ Addition (this function is copied over from the nodeprofile module.) ******************
*/
/* Check if nodetype is enabled for annotations. */
function is_annotatetype($type) {
  if (is_object($type)) {
    $type = $type->type;
  }
  return variable_get('annotate_nodetype_' . $type, 0);
}
/**
************ End of addition ******************
*/


/** 
 * Define the form for entering an annotation. 
 */ 
function annotate_entry_form($node) { 
  $form['annotate'] = array( 
    '#type' => 'fieldset', 
    '#title' => t('Annotations') 
  ); 
  $form['annotate']['nid'] = array( 
    '#type' => 'value', 
    '#value' => $node->nid 
  ); 
  $form['annotate']['note'] = array( 
    '#type' => 'textarea', 
    '#title' => t('Notes'), 
    '#default_value' => $node->annotation, 
    '#description' => t('Make your personal annotations about this content here. Only you (and the site administrator) will be able to see them.') 
  ); 
  $form['annotate']['submit'] = array( 
    '#type' => 'submit', 
    '#value' => t('Update') 
  ); 
  return $form; 
} 

/* 
 * Save the annotation to the database. 
 */ 
function annotate_entry_form_submit($form_id, $form_values) { 
  global $user; 
  $nid = $form_values['nid']; 
  $note = $form_values['note']; 
  db_query("DELETE FROM {annotations} WHERE uid = %d and nid = %d", $user->uid, $nid); 
  db_query("INSERT INTO {annotations} (uid, nid, note, timestamp) VALUES (%d, %d, '%s', %d)", $user->uid, $nid, $note, time()); 
  drupal_set_message(t('Your annotation was saved.')); 
}