Wordpress plugin to crosspost to Posterous blogs.

readme.txt

=== Crossposterous ===
Contributors: Randy Hunt
Tags: posterous, posts, crosspost
Requires at least: 2.7
Tested up to: 3.0
Stable tag: 1.2.1

WordPress to Posterous cross-posting plugin.

== Description ==

Crossposterous will cross-post your Wordpress blog post to your Posterous site. You can choose whether to post a teaser with a link back your Wordpress blog post or cross-post the full content.


== Installation ==

1. If you are upgrading, it is recommended that you deactivate the plugin from the Plugins page, and delete the posterize folder from your server.
2. Upload the unzipped contents to your /wp-content/plugins/ directory.
3. Active the plugin from the Plugins page.
4. Go to settings page to configure Crossposterous

== Configuration == 

1. Enter your Posterous email and password (used to log into http://posterous.com)
2. Select the site from the drop-down
3. Chose "Link back to post" or "Post full content"

== Changelog ==

= 1.2 = 
* Corrected a "function_exists" bug

= 1.1 =
* Added php4 compatible xml parsing

= 1.0 =
* Initial version

crossposterous.php

<?php
/*
Plugin Name: Crossposterous
Plugin URI: http://www.bbqiguana.com/wordpress-plugins/crossposterous/
Description: This plugin will automatically cross-post your Wordpress blog entry to your Posterous site. 
Version: 1.2.1
Author: Randy Hunt
Author URI: http://www.bbqiguana.com/
*/

/*  Copyright 2010  Randy Hunt  (email : [email protected])

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/



/* When plugin is activated */
register_activation_hook  (__FILE__, 'crossposterous_activate'  );
register_deactivation_hook(__FILE__, 'crossposterous_deactivate');

function crossposterous_activate () {
    $options = array('email'=>'', 'password'=>'', 'siteid'=>'', 'posttype'=>'');
	add_option('crossposterous', $options);
}

function crossposterous_deactivate () {
	delete_option('crossposterous');
}

if (is_admin()) {
	add_action('admin_menu',      'crossposterous_admin_menu');
	add_action('admin_init',      'crossposterous_init');
	add_filter('plugin_row_meta', 'posterizePluginLinks',10,2);

	function crossposterous_admin_menu(){
		add_options_page('Crossposterous Settings', 'Crossposterous', 'administrator', __FILE__, 'crossposterous_admin_page');
	}

	function posterizePluginLinks($links, $file){
		if( $file == 'posterize/posterize.php') {
			$links[] = '<a href="' . admin_url( 'options-general.php?page=posterize-settings' ) . '">' . __('Settings') . '</a>';
			$links[] = '<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=QC745TKR6AHBS" target="_blank">Donate</a>';
		}
		return $links;
	}

	function crossposterous_init() {
		register_setting('crossposterous','crossposterous');
		add_settings_section('posterous', 'Posterous settings', 'crossposterous_foo', __FILE__);
		add_settings_field('email', 'Email address', 'crossposterous_render_email', __FILE__, 'posterous');
		add_settings_field('password', 'Password', 'crossposterous_render_password', __FILE__, 'posterous');
		add_settings_field('siteid', 'Site ID', 'crossposterous_render_sites', __FILE__, 'posterous');
		add_settings_field('posttype', 'What to post', 'crossposterous_render_posttype', __FILE__, 'posterous');
	}

	function crossposterous_foo() {
		//echo '1.foo';
	}

	function crossposterous_render_email () {
		$options = get_option('crossposterous');
		echo '<input id="posterous_email" name="crossposterous[posterous_email]" size="40" type="text" value="' . $options['posterous_email'] . '" class="regular-text" />';
	}

	function crossposterous_render_password () {
		$options = get_option('crossposterous');
		echo '<input id="posterous_password" name="crossposterous[posterous_password]" size="40" type="text" value="' . $options['posterous_password'] . '" class="regular-text" />';
	}

	function crossposterous_render_sites () {
		$options  = get_option('crossposterous');
		$email    = $options['posterous_email'];
		$password = $options['posterous_password'];

		$xml = invoke_rest_api('http://posterous.com/api/getsites', 'GET', null, $email, $password);

		if (function_exists('simplexml_load_string')) {
			$root = simplexml_load_string($xml);
			$data = get_object_vars($root);
		} else {
			require('xml2arr.php');
			$data = xml2array($xml);
			if ($data['rsp']) $data = $data['rsp'];
		}

		$sites = array();

		if(!$data['site']){
			print '<div class="error"><strong>Error:</strong> Check your username and password</div>';
		} else {
			$html = '<select id="posterous_site" name="crossposterous[siteid]"><option value=""></option>';
//			/if(is_array($data['site'])){
//
//				foreach ($data['site'] as $key => $value) {
//					$site[$key] = $value;
//					//foreach ($values as $key => $value) {
//					//	$sites['site'][$keys][$key] = $value;
//					//}
//				}
//				$html .= "<option value=\"{$site['id']}\">{$site['name']}</option>";
//				//foreach($sites['site'] as $site){
//				//	$html .= '<option value="'.$site['id'].'">'.$site['name'].'</option>';
//				//}
//			}else{
				foreach ($data['site'] as $key => $value) {
					$site[$key] = $value;
				}
				$html .= "<option value=\"{$site['id']}\"".($site['id']==$options['siteid']?" selected" :"").">{$site['name']}</option>";
//			}
			echo $html . '</select>';
		}
	}

	function crossposterous_render_posttype () {
		$options = get_option('crossposterous');
		echo '<input name="crossposterous[posttype]" type="radio" value="link"'.($options['posttype']=='link'?' checked':'').'> <label>Teaser and link.</label><br>';
		echo '<input name="crossposterous[posttype]" type="radio" value="full"'.($options['posttype']=='full'?' checked':'').'> <label>Post full content.</label><br>';
	}

	function crossposterous_admin_page() {
		echo '<div class="wrap">';
		echo '<div class="icon32" id="icon-options-general"><br></div>';
		echo '<h2>crossposterous</h2>';
		echo '<form action="options.php" method="post">';
		settings_fields('crossposterous');
		do_settings_sections(__FILE__);
		echo '<p class="submit">';
		echo '<input name="Submit" type="submit" class="button-primary" value="' . __('Save Changes') . '" />';
		echo '</p>';
		echo '</form>';
		echo '</div>';
	}  
}

function crossposterous_excerpt ($text, $more='... ', $limit=55) {
  $text = strip_shortcodes( $text );
  $text = str_replace(']]>', ']]&gt;', $text);
  if (preg_match('/<!--more(.*?)?-->/', $text, $matches) ) {
    $text = explode($matches[0], $text, 2);
    $text = strip_tags($text[0]) . $more;
  } else {
    $text = strip_tags($text);
    $words = explode(' ', $text, $limit + 1);
    if (count($words) > $limit) {
      array_pop($words);
      $text = implode(' ', $words) . $more;
    }
  }
  return $text;
}

function send_to_posterous ($post_ID) {
	$options  = get_option('crossposterous');
	$email    = $options['posterous_email'];
	$password = $options['posterous_password'];
	$siteid   = $options['posterous_siteid'];

	if ($email!='' && $password!='') {
		global $userdata;
		get_currentuserinfo();

		$post = get_post($post_ID);

		$data = array();
		$data['site_id'] = $options['siteid'];
		$data['title']   = $post->post_title;

		if ($options['posttype'] == 'full') {
			$data['body'] = $post->post_content;
		} else {
			$blog_title = get_bloginfo();
			$data['body'] = crossposterous_excerpt($post->post_content) . ' <a href="'.get_permalink($post_ID).'">continue reading at ' . $blog_title . '</a>';
		}
		$tags = array();
		$posttags = get_the_tags($post_ID);
		if ($posttags) {
			foreach($posttags as $tag) {
				$tag[] = $tag->name; 
			}
		}
		$data['tags']       = implode(',', $tags);
		$data['source']     = 'Crossposterous';
		$data['sourceLink'] = 'http://www.bbqiguana.com/wordpress-plugins/crossposterous/';

		$url = 'http://posterous.com/api/newpost';
		invoke_rest_api($url, 'POST', $data, $email, $password);
	}
}

function invoke_rest_api ($endpoint, $method = 'GET', $data = null, $username = '', $password = '') {
	$url = $endpoint;
	$ch  = curl_init();
	if($data) {
		$postdata = array();
		foreach ($data as $key=>$value)
			array_push($postdata, $key . '=' . urlencode($value));

        if ($method = 'POST') {
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, implode('&', $postdata));
        } else {
            $url .= '?' . implode('&', $postdata);
            curl_setopt($ch, CURLOPT_URL, $url);
        }
    } else {
        curl_setopt($ch, CURLOPT_URL, $url);
    }
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    if ($username && $password) {
        curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
        curl_setopt($ch, CURLOPT_USERPWD, $username . ':' . $password);
    }
    $response = curl_exec($ch);
    curl_close($ch);
    return $response;
}

add_action('new_to_publish',     'send_to_posterous');
add_action('draft_to_publish',   'send_to_posterous');
add_action('future_to_publish',  'send_to_posterous');
add_action('pending_to_publish', 'send_to_posterous');

?>

xml2arr.php

<?php 
/** 
 * xml2array() will convert the given XML text to an array in the XML structure. 
 * Link: http://www.bin-co.com/php/scripts/xml2array/ 
 * Arguments : $contents - The XML text 
 *                $get_attributes - 1 or 0. If this is 1 the function will get the attributes as well as the tag values - this results in a different array structure in the return value. 
 *                $priority - Can be 'tag' or 'attribute'. This will change the way the resulting array sturcture. For 'tag', the tags are given more importance.
 * Return: The parsed XML in an array form. Use print_r() to see the resulting array structure.
 * Examples: $array =  xml2array(file_get_contents('feed.xml')); 
 *              $array =  xml2array(file_get_contents('feed.xml', 1, 'attribute')); 
 */ 
function xml2array($contents, $get_attributes=1, $priority = 'tag') { 
    if(!$contents) return array(); 

    if(!function_exists('xml_parser_create')) { 
        //print "'xml_parser_create()' function not found!"; 
        return array(); 
    } 

    //Get the XML parser of PHP - PHP must have this module for the parser to work 
    $parser = xml_parser_create(''); 
    xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); # http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss 
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0); 
    xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1); 
    xml_parse_into_struct($parser, trim($contents), $xml_values); 
    xml_parser_free($parser); 

    if(!$xml_values) return;//Hmm... 

    //Initializations 
    $xml_array = array(); 
    $parents = array(); 
    $opened_tags = array(); 
    $arr = array(); 

    $current = &$xml_array; //Refference 

    //Go through the tags. 
    $repeated_tag_index = array();//Multiple tags with same name will be turned into an array
    foreach($xml_values as $data) { 
        unset($attributes,$value);//Remove existing values, or there will be trouble 

        //This command will extract these variables into the foreach scope 
        // tag(string), type(string), level(int), attributes(array). 
        extract($data);//We could use the array by itself, but this cooler. 

        $result = array(); 
        $attributes_data = array(); 
         
        if(isset($value)) { 
            if($priority == 'tag') $result = $value; 
            else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
        } 

        //Set the attributes too. 
        if(isset($attributes) and $get_attributes) { 
            foreach($attributes as $attr => $val) { 
                if($priority == 'tag') $attributes_data[$attr] = $val; 
                else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
            } 
        } 

        //See tag status and do the needed. 
        if($type == "open") {//The starting of the tag '<tag>' 
            $parent[$level-1] = &$current; 
            if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
                $current[$tag] = $result; 
                if($attributes_data) $current[$tag. '_attr'] = $attributes_data; 
                $repeated_tag_index[$tag.'_'.$level] = 1; 

                $current = &$current[$tag]; 

            } else { //There was another element with the same tag name 

                if(isset($current[$tag][0])) {//If there is a 0th element it is already an array
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result; 
                    $repeated_tag_index[$tag.'_'.$level]++; 
                } else {//This section will make the value an array if multiple tags with the same name appear together
                    $current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
                    $repeated_tag_index[$tag.'_'.$level] = 2; 
                     
                    if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                        $current[$tag]['0_attr'] = $current[$tag.'_attr']; 
                        unset($current[$tag.'_attr']); 
                    } 

                } 
                $last_item_index = $repeated_tag_index[$tag.'_'.$level]-1; 
                $current = &$current[$tag][$last_item_index]; 
            } 

        } elseif($type == "complete") { //Tags that ends in 1 line '<tag />' 
            //See if the key is already taken. 
            if(!isset($current[$tag])) { //New Key 
                $current[$tag] = $result; 
                $repeated_tag_index[$tag.'_'.$level] = 1; 
                if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data;

            } else { //If taken, put all things inside a list(array) 
                if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array...

                    // ...push the new element into that array. 
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result; 
                     
                    if($priority == 'tag' and $get_attributes and $attributes_data) {
                        $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                    } 
                    $repeated_tag_index[$tag.'_'.$level]++; 

                } else { //If it is not an array... 
                    $current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
                    $repeated_tag_index[$tag.'_'.$level] = 1; 
                    if($priority == 'tag' and $get_attributes) { 
                        if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                             
                            $current[$tag]['0_attr'] = $current[$tag.'_attr']; 
                            unset($current[$tag.'_attr']); 
                        } 
                         
                        if($attributes_data) { 
                            $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                        } 
                    } 
                    $repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken
                } 
            } 

        } elseif($type == 'close') { //End of tag '</tag>' 
            $current = &$parent[$level-1]; 
        } 
    } 
     
    return($xml_array); 
}
?>