[WordPress][Backlog API] CF7 to Backlog

gistfile1.php

<?php
/*
Plugin Name: WP CF7 to Backlog
Plugin URI: 
Description: 
Author: wokamoto
Version: 0.0.1
*/

include_once( ABSPATH . WPINC . '/class-IXR.php' );
include_once( ABSPATH . WPINC . '/class-wp-http-ixr-client.php');

// new cf7_to_backlog('backlog_spacename', 'backlog_user', 'backlog_passwd', 'backlog_projectkey', (int)backlog_userid);

class cf7_to_backlog {
	const API_URL = 'https://%s.backlog.jp/XML-RPC';
	const DEFAULT_TITLE = 'CF7 からの問い合わせ';

	private $ixr;
	private $backlog_api;
	private $backlog_user;
	private $backlog_pass;
	private $backlog_project;
	private $backlog_assignerId;

	function __construct( $space_name, $user, $pass, $project_key, $assigner = null ){
		add_filter ( 'http_request_args', array($this, 'http_request_args'), 10, 2 );

		$this->backlog_api  = sprintf(self::API_URL, $space_name);
		$this->backlog_user = $user;
		$this->backlog_pass = $pass;
		$this->ixr = new WP_HTTP_IXR_Client($this->backlog_api);

		$this->backlog_project = $this->get_project_id($project_key);
		$this->backlog_assignerId = apply_filters('cf7_to_backlog::assigner', intval($assigner));

		add_action( 'wpcf7_submit', array($this, 'wpcf7_backlog_submit'), 10, 2 );
		add_filter( 'cf7_to_backlog::summary', array($this, 'issue_title') );
	}

	private function get_project_id( $project_key ){
		$this->ixr->query('backlog.getProject', $project_key);
		if ( $this->ixr->isError() )
			return new WP_Error('get_project_id', $this->ixr->getErrorMessage());

		$res = $this->ixr->getResponse();
		return
			!isset($res['id'])
			? new WP_Error('get_project_id', 'unknown error')
			: intval($res['id']);
	}

	private function create_issue($args = array()){
		$args['projectId'] = $this->backlog_project;
		$args['assignerId']= $this->backlog_assignerId;
		$args['summary']   = apply_filters( 'cf7_to_backlog::summary', isset($args['summary']) ? $args['summary'] : self::DEFAULT_TITLE );
		$args['due_date']  = apply_filters( 'cf7_to_backlog::due_date', date("Ymd",strtotime("+1 day")) );
		$args['issueType'] = apply_filters( 'cf7_to_backlog::issueType', 'タスク' );

		$this->ixr->query('backlog.createIssue', $args);
		if ( $this->ixr->isError() )
			return new WP_Error('create_issue', $this->ixr->getErrorMessage());

		return $this->ixr->getResponse();
	}

	public function issue_title($summary) {
		return
			$summary != '[your-subject]'
			? $summary
			: self::DEFAULT_TITLE;
	}

	public function http_request_args( $args, $url ) {
		if ( false !== strpos($url, $this->backlog_api) ) {
			$args['headers']['Authorization'] = 'Basic '. base64_encode("{$this->backlog_user}:{$this->backlog_pass}");
		}
		return $args;
	}

	public function wpcf7_backlog_submit( $contactform, $result ) {
		$cases = (array) apply_filters( 'cf7_to_backlog::submit_if', array( 'mail_sent', 'mail_failed' ) );

		if ( empty( $result['status'] ) || ! in_array( $result['status'], $cases ) )
			return;

		if ( empty( $contactform->posted_data ) )
			return;

		$fields_senseless = $contactform->form_scan_shortcode(
			array( 'type' => array( 'captchar', 'quiz', 'acceptance' ) ) );

		$exclude_names = array();

		foreach ( $fields_senseless as $tag )
			$exclude_names[] = $tag['name'];

		$posted_data = $contactform->posted_data;

		foreach ( $posted_data as $key => $value ) {
			if ( '_' == substr( $key, 0, 1 ) || in_array( $key, $exclude_names ) )
				unset( $posted_data[$key] );
		}

		$email   = $this->wpcf7_get_value( 'email',   $contactform );
		$name    = $this->wpcf7_get_value( 'name',    $contactform );
		$subject = $this->wpcf7_get_value( 'subject', $contactform );

		$special_mail_tags = array( 'remote_ip', 'user_agent', 'url', 'date', 'time',
			'post_id', 'post_name', 'post_title', 'post_url', 'post_author', 'post_author_email' );

		$akismet = isset( $contactform->akismet ) ? (array) $contactform->akismet : null;

		$content = '';

		$fields = $this->array_flatten( $posted_data );
		$fields = array_filter( array_map( 'trim', $fields ) );
		$content = implode( "\n", $fields );

		$this->create_issue(array(
			'summary'     => $subject,
			'description' => $content,
			));
	}

	private function wpcf7_get_value( $field, $contactform ) {
		if ( empty( $field ) || empty( $contactform ) )
			return false;

		$value = '';

		if ( in_array( $field, array( 'email', 'name', 'subject' ) ) ) {
			$templates = $contactform->additional_setting( 'flamingo_' . $field );

			if ( empty( $templates[0] ) ) {
				$template = sprintf( '[your-%s]', $field );
			} else {
				$template = trim( wpcf7_strip_quote( $templates[0] ) );
			}

			$value = $contactform->replace_mail_tags( $template );
		}

		$value = apply_filters( 'cf7_to_backlog::wpcf7_get_value', $value, $field, $contactform );

		return $value;
	}

	private function array_flatten( $input ) {
		if ( ! is_array( $input ) )
			return array( $input );

		$output = array();

		foreach ( $input as $value )
			$output = array_merge( $output, $this->array_flatten( $value ) );

		return $output;
	}
}

あざます、このコードはとりあえず動かすためのサンプルなんで、これからブラッシュアップしていく予定です。