Simpul Meta - For Adding Meta Fields to Wordpress Post Types

meta.php

<?php
/**
 * SimpulMeta by Alexander Conroy
 * Copyright 2012 Esotech Inc.
 * MIT License
 * http://opensource.org/licenses/MIT
 * 
 * args = array()
 * Valid Values:
 * post_type - Which post type to attach meta to. 
 * child_of - Makes sure this only shows on the child of a specific page id
 * fields = array()
 *  fieldname => fieldtype
 *  Valid Types: text, image, file, textarea, checkbox, date, datetime, select
 * fields_values = array()
 *  value => label
 * simpul.meta.upload is Included in a function now and no longer needs to be included
 */

$page_meta_args = 
array(
    'post_type'     => 'page',
    'child_of'      => 5453,
    'fields'        => array(   
                           'field1'    => 'select',
                           'field2'    => 'file'
                        ),
    'fields_values'  => array('field1' 
                        => array('value1' => 'label1', 
                                 'value2' => 'label2')
                       )
);
$page_meta = new SimpulMeta( $page_meta_args );

class SimpulMeta {
    public function __construct( $args ) {
        $this->post_type             = $args['post_type'];
        $this->fields                = $args['fields'];
        $this->fields_values         = !empty($args['fields_values']) ? $args['fields_values'] : '';
        $this->child_of              = !empty($args['child_of']) ? $args['child_of'] : '';
        
        self::setMetaFields();
        add_action( 'add_meta_boxes', array(&$this, 'addCustomBox') ); // Add Meta Box
        add_action( 'save_post', array(&$this, 'savePostData') ); // Save Meta Box Info
    }
    public function setMetaFields()
    {
        foreach($this->fields as $key => $value):
            $this->meta_fields[$this->meta_prefix . $key] = $value;
        endforeach;
        
        //Iterate and Create Label.
        foreach($this->meta_fields as $field => $format):
                $this->meta_box_fields[$field] = self::getLabel(str_replace($this->meta_prefix, "", $field));
                $this->meta_box_fields_formats[$field] = $format;
        endforeach;
    }
    public function addCustomBox() {
        global $post;
        if((!empty($this->child_of) && $this->child_of == $post->post_parent)
                || empty($this->child_of)):
            add_meta_box( 
                $this->post_type . '_meta',
                __( self::getLabel($this->post_type) . ' Meta', $this->post_type . '_meta' ),
                array(&$this, 'innerCustomBox'),
                $this->post_type,
                'side', 
                'high'
            );
            
            if( $post->post_type == $this->post_type ): //These scripts interfere with regular post insertion =(
                add_action('admin_print_scripts', array( &$this, 'registerScripts' ) );
                add_action('admin_head', array( $this, 'simpulMetaUpload' ), 11);
                add_action('admin_print_styles' , array( &$this, 'registerStyles' ) );
                
            endif;
        endif;
    }
    //Add the Inner Custom Meta Box and the custom Meta Fields
    public function innerCustomBox( $post ) {
        global $post;
        // Use nonce for verification
        wp_nonce_field( plugin_basename( __FILE__ ), 'myplugin_noncename' );
        echo '<table class="widefat" cellpadding="0" cellspacing="0" border="0">';
        //Add this to work with Custom Javascript that needs image dir. 
        echo '<span id="bloginfo" stylesheet_dir_uri="' . get_template_directory_uri() . '" style="display: none">';
        // The actual fields for data entry
        //Iterate through the array. Will expand or contract as fields are added in the database (through scraper).
        foreach($this->meta_box_fields as $field => $label):
            echo self::formatFields($post, $field, $label, $this->post_type . '_meta', $this->meta_box_fields_formats[$field] );
        endforeach;
        echo "</table>";
      
    }
    //Saves the Meta Box Values
    public function savePostData( $post_id ) {
      global $post;
      // verify if this is an auto save routine. 
      // If it is our form has not been submitted, so we dont want to do anything
      if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 
          return;
    
      // verify this came from the our screen and with proper authorization,
      // because save_post can be triggered at other times
      
      // Check permissions
     
      if ( !current_user_can( 'edit_post', $post->ID) )
          return;
    
      // OK, we're authenticated: we need to find and save the data
        foreach($this->meta_box_fields_formats as $field => $format):
            if($_POST[$field]):
                switch( $format ):
                case "datetime":
                    update_post_meta($post->ID, $field, date("Y-m-d H:i:s", strtotime( $_POST[$field] ) ) );
                    break;
                case "date":
                    update_post_meta($post->ID, $field, date("Y-m-d", strtotime( $_POST[$field] ) ) );
                    break;
                default:
                    update_post_meta($post->ID, $field, $_POST[$field]);
                    break;
                endswitch;
            else:
                if( get_post_meta($post->ID, $field, true) ):
                    delete_post_meta($post->ID, $field); // Useful for Checkboxes. Delete completely.
                endif;
            endif;
        endforeach;;
      // Do something with $mydata 
      // probably using add_post_meta(), update_post_meta(), or 
      // a custom table (see Further Reading section below)
    }
    public function formatFields($post, $field_name, $label, $box, $format )
    {
      echo "<tr>";
      
      switch($format):
         case "datetime":
            echo '<th><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label> </th>';  
            echo '<td><input type="text" id="' . $field_name . '" name="' . $field_name . '" class="hasDateTimePicker" value="' . get_post_meta($post->ID, $field_name ,true) . '"  /></td>';
            break;
        case "date":
            echo '<th><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label> </th>';  
            echo '<td><input type="text" id="' . $field_name . '" name="' . $field_name . '" class="hasDatePicker" value="' . get_post_meta($post->ID, $field_name ,true) . '"  /></td>';
            break;
        case "image":
            echo '<th colspan="2"><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label><br>';    
            echo '
            <input id="simpul_meta_upload_' . $field_name . '" class="regular-text" type="text" name="' . $field_name . '" value="' . get_post_meta($post->ID, $field_name ,true) . '" style="width: 70%; margin: 0;"/>
            <button class="simpul_meta_upload button-secondary" data-input="simpul_meta_upload_' . $field_name . '" pe="button">Browse</button>';
            $image = get_post_meta($post->ID, $field_name ,true);
            if($image):
                echo '<img src="' . $image . '" style="width: 100%; margin-top: 10px;" />';
            endif;
            echo "</th>";
            break;
        case "file":
            echo '<th colspan="2"><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label><br>';    
            echo '
            <input id="simpul_meta_upload_' . $field_name . '" class="regular-text" type="text" name="' . $field_name . '" value="' . get_post_meta($post->ID, $field_name ,true) . '" style="width: 70%; margin: 0;"/>
            <button class="simpul_meta_upload button-secondary" data-input="simpul_meta_upload_' . $field_name . '" name="' . $field_name . '" type="button">Browse</button>';
            echo "</th>";
            break;
        case "checkbox":
            $value = get_post_meta($post->ID, $field_name ,true);
            if($value) $checked = "checked"; else $checked = '';
            echo '<th><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label><br>';    
            echo '<td><input type="checkbox" id="' . $field_name . '" name="' . $field_name . '" value="1" ' . $checked . ' /></td>';
            break;
        case "select":
            if(!empty($this->fields_values[$field_name])):
                $value = get_post_meta($post->ID, $field_name ,true);
                if($value) $checked = "checked"; else $checked = '';
                echo '<th><label for="' . $field_name . '">';
                _e($label, $box );
                echo '</label><br>';    
                echo '<td><select id="' . $field_name . '" name="' . $field_name . '" style="width: 100%;">';
                foreach($this->fields_values[$field_name] as $key => $value):
                echo '<option value="' . $key . '">' . $value . '</option>';
                endforeach;
                echo '</select></td>';
            endif;
            break;
        case "textarea":
            echo '<th colspan="2"><label for="' . $field_name . '">';
             _e($label, $box );
            echo '</label><br>';    
            echo '<textarea rows="4" style="width: 100%;" id="' . $field_name . '" name="' . $field_name . '">' . get_post_meta($post->ID, $field_name ,true) . '</textarea></th>';
            break;
        default:
            echo '<th><label for="' . $field_name . '">';
             _e($label, $box );
            echo '<td><input type="text" id="' . $field_name . '" name="' . $field_name . '" value="' . get_post_meta($post->ID, $field_name ,true) . '" " style="width: 100%;"/></td>';
            break;
      endswitch;
      echo "</tr>";
    }
    public function getLabel($key)
    {
        $glued = array();
        if( strpos( $key, "-" ) ) $pieces = explode( "-", $key );
        elseif( strpos( $key, "_" ) ) $pieces = explode( "_", $key );
        else $pieces = explode(" ", $key);
        
        foreach($pieces as $piece):
            if($piece == "id"):
                $glued[] = strtoupper($piece);
            else:
                $glued[] = ucfirst($piece);
            endif;
        endforeach;
            
        return implode(" ", $glued);
    }
    public function registerScripts()
    {
        if(!wp_script_is('media-upload')):
            wp_enqueue_script('media-upload');
        endif;
        if(!wp_script_is('thickbox')):
            wp_enqueue_script('thickbox');
        endif;
    }
    public function registerStyles()
    {
        wp_enqueue_style('thickbox');
        //wp_register_style('jquery-ui-custom-css', WP_PLUGIN_URL . '/simpulevents/css/jquery-ui-1.8.16.custom.css');
        //wp_enqueue_style('jquery-ui-custom-css');
    }
    public function simpulMetaUpload(){
        $GLOBALS['simpul_meta_upload'] = true;
        ?>
<script type="text/javascript">
    var original_send_to_editor = "";  
    var modified_send_to_editor = "";
    var formfield = '';
    var hrefurl = '';
     
    jQuery(document).ready( function() {    
        
        original_send_to_editor = window.send_to_editor;
        
        modified_send_to_editor = function(html) {
                    hrefurl = jQuery('img',html).attr('src');
                    console.log(jQuery(html));
                    if(!hrefurl) {
                        hrefurl = jQuery(html).attr('href'); // We do this to get Links like PDF's
                    }
                    hrefurl = hrefurl.substr(hrefurl.indexOf('/',8)); // Skips "https://" and extracts after first instance of "/" for relative URL, ex. "/wp-content/themes/currentheme/images/etc.jpg"
                     console.log(hrefurl);
                    jQuery('#' + formfield).val(hrefurl);
                    tb_remove();
                    window.send_to_editor = original_send_to_editor;
                };          
        
        jQuery('.simpul_meta_upload').click(function() {
            window.send_to_editor = modified_send_to_editor;
            formfield = jQuery(this).attr('data-input');
            tb_show('Add File', 'media-upload.php?TB_iframe=true');
            console.log(formfield);
            return false;
        });
    } );
</script>
        <?php
    }
}
?>