<?php
/** 
 *  When a posts is saved  this class is called for  check if exists  a write panel with custom fields
 *  if exists  then this processes all the custom fields and save his values in the database
 */
class RCCWP_Post {
	/**
	 *  This function is called when  a post is saves
	 */
	function SaveCustomFields($postId){
		global $flag;
		
		if($flag == 0){
			
			//with this  the save_post action don't will be execute twice
			$flag = 1;
			
			
			//security
			if(!wp_verify_nonce($_REQUEST['rc-custom-write-panel-verify-key'], 'rc-custom-write-panel'))
				return $postId;
			
			//the user  can edit posts?
			if (!current_user_can('edit_post', $postId)){
				return $postId;
			}
			
			RCCWP_Post::SetCustomWritePanel($postId);
			RCCWP_Post::PrepareFieldsValues($postId);
			RCCWP_Post::SetMetaValues($postId);
	
			return $postId;
		}
	}
		
	/**
	 * Attach a custom write panel to the current post by saving the custom write panel id
	 * as a meta value for the post
	 * 
	 *  @param integer $postId
	 */
	function SetCustomWritePanel($postId) {
		$customWritePanelId = $_POST['rc-cwp-custom-write-panel-id'];
		if (isset($customWritePanelId)) {
			if (!empty($customWritePanelId)) {	
				if (!update_post_meta($postId, RC_CWP_POST_WRITE_PANEL_ID_META_KEY, $customWritePanelId)) {
					add_post_meta($postId, RC_CWP_POST_WRITE_PANEL_ID_META_KEY, $customWritePanelId);
				}
			} else {
				delete_post_meta($postId, RC_CWP_POST_WRITE_PANEL_ID_META_KEY);
			}
		}
	}
	
	/**
	 * Save all custom field values meta values for the post, this function assumes that 
	 * $_POST['rc_cwp_meta_keys'] contains the names of the fields, while $_POST[{FIELD_NAME}]
	 * contains the value of the field named {FIELD_NAME}
	 *
	 * @param integer $postId
	 * @return void
	 */
	function SetMetaValues($postId){
		global $wpdb;
	
		$customWritePanelId = $_POST['rc-cwp-custom-write-panel-id'];
		
		//delete file
		if(!empty($_POST['magicfields_remove_files'])){
			$files = preg_split('/\|\|\|/', $_POST['magicfields_remove_files']);
			foreach($files as $file){
				@unlink(MF_FILES_PATH.$file);
			}
		}
		
		
		if(empty($_POST['magicfields'])){
			return true;
		}
		
		$customfields = $_POST['magicfields'];


		if ( $the_post = wp_is_post_revision($postId))
			$postId = $the_post;

		
		if (!empty($customWritePanelId)) {
				
			// --- Delete old values
			foreach($customfields as $name => $field){
				delete_post_meta($postId,$name);
			}

			$wpdb->query("DELETE FROM ". MF_TABLE_POST_META .
				" WHERE post_id=$postId");
			
			//Creating the new values
			//Iterating the custom fields
			foreach($customfields as $name => $groups){
				$groups_index = 1;
				//Iterating the groups
				foreach($groups as $group_id => $fields){ 
					$index = 1;
					//Iterating the  duplicates
					foreach($fields as $value){
						// Adding field value meta data
						add_post_meta($postId, $name, $value);
							
						$fieldMetaID = $wpdb->insert_id;
						
						// Adding  the referencie in the magic fields post meta table
						$wpdb->query("INSERT INTO ". MF_TABLE_POST_META .
										" (id, field_name, group_count, field_count, post_id,order_id) ".
										" VALUES ({$fieldMetaID}, '{$name}',{$groups_index},{$index},{$postId},{$groups_index})"
									);
									
						$index++;
					}
					$groups_index++;
				} 		
			}
		}
	}
	
	/**
	 * This function prepares some custom fields before saving it. It reads $_REQUEST and:
	 * 1. Adds params to photos uploaded (Image field)
	 * 2. Formats dates (Date Field) 
	 * 
	 *  @param integer postId
	 */
	function PrepareFieldsValues($postId) {
		global $wpdb;
			
		// Format Dates
		if( isset( $_REQUEST['rc_cwp_meta_date'])){
			foreach( $_REQUEST['rc_cwp_meta_date'] as $meta_name ) {
				$metaDate = strtotime($_POST[$meta_name]);
				$formatted_date = date('Y-m-d',$metaDate);
				$_POST[$meta_name] = $formatted_date;
			}
		}
	}
	
	/**
	 * Get a custom write panel by reading $_REQUEST['custom-write-panel-id'] or the
	 * To see whether $_GET['post'] has a custom write panel associated to it.
	 *
	 * @return Custom Write Panel as an object, returns null if there is no write panels.
	 */
	function GetCustomWritePanel()
	{
	    global $wpdb;
		
		if (isset($_GET['post']))
		{

			$customWritePanelId = get_post_meta((int)$_GET['post'], RC_CWP_POST_WRITE_PANEL_ID_META_KEY, true);
		
	
			if (empty($customWritePanelId))
			{
				$customWritePanelId = (int)isset($_REQUEST['custom-write-panel-id']);
			}
		}
		else if (function_exists('icl_t') && isset($_GET['trid']) )
		{
		    $element_id = $wpdb->get_col("SELECT element_id FROM {$wpdb->prefix}icl_translations WHERE element_type='post' AND trid = ".intval($_GET['trid']));
			$customWritePanelId = get_post_meta((int)$element_id, RC_CWP_POST_WRITE_PANEL_ID_META_KEY, true);

			if (empty($customWritePanelId))
			{
				$customWritePanelId = (int)$_REQUEST['custom-write-panel-id'];
			}

		}
		else if (isset($_REQUEST['custom-write-panel-id']))
		{
			$customWritePanelId = (int)$_REQUEST['custom-write-panel-id'];
		}
		
		$customWritePanel = FALSE;
		if (isset($customWritePanelId)) {
			include_once('RCCWP_Application.php');
			$customWritePanel = RCCWP_CustomWritePanel::Get($customWritePanelId);
		}
		
		return $customWritePanel;
	}

	/**
 	 *  This Method is Executed when a post is deleted
 	 *  @param integer $postId
  	 *  @TODO  check if  is deleted the  values in wp_postmeta too 
 	 */
	function DeletePostMetaData($postId) {
		global $wpdb;
		$wpdb->query("DELETE FROM " . MF_TABLE_POST_META . " WHERE post_id =" . $postId) ;
	}	
}