From 89cad96fd9cd059a7e466ce0340466f4db506f6e Mon Sep 17 00:00:00 2001
From: Lee Willis <leewillis77@gmail.com>
Date: Fri, 1 Feb 2013 23:44:31 +0000
Subject: [PATCH] Initial commit

---
 github-oembed.php | 262 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 262 insertions(+)
 create mode 100644 github-oembed.php

diff --git a/github-oembed.php b/github-oembed.php
new file mode 100644
index 0000000..46a06c4
--- /dev/null
+++ b/github-oembed.php
@@ -0,0 +1,262 @@
+<?php
+
+/*
+Plugin Name: Github oEmbed
+Plugin URI: http://www.leewillis.co.uk/wordpress-plugins
+Description: Paste the URL to a Github project into your posts or pages, and have the project information pulled in and displayed automatically
+Version: 1.0
+Author: Lee Willis
+Author URI: http://www.leewillis.co.uk/
+*/
+
+/**
+ * Copyright (c) 2013 Lee Willis. All rights reserved.
+ *
+ * Released under the GPL license
+ * http://www.opensource.org/licenses/gpl-license.php
+ *
+ * This is an add-on for WordPress
+ * http://wordpress.org/
+ *
+ * **********************************************************************
+ * 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.
+ * **********************************************************************
+ */
+
+class github_oembed {
+
+
+
+	/**
+	 * Constructor. Registers hooks and filters
+	 */
+	public function __construct() {
+
+		add_action ( 'init', array ( $this, 'register_oembed_handler' ) );
+		add_action ( 'init', array ( $this, 'maybe_handle_oembed' ) );
+
+		// @TODO i18n
+
+	}
+
+
+
+	/**
+	 * Register the oEmbed provider, and point it at a local endpoint since github
+	 * doesn't directly support oEmbed yet. Our local endpoint will use the github
+	 * API to fulfil the request.
+	 * @param  array $providers The current list of providers
+	 * @return array            The list, with our new provider added
+	 */
+	public function register_oembed_handler() {
+
+		$oembed_url = home_url ();
+		$key = $this->get_key();
+		$oembed_url = add_query_arg ( array ( 'github_oembed' => $key ), $oembed_url);
+		wp_oembed_add_provider ( '#https?://github.com/.*#i', $oembed_url, true );
+
+	}
+
+
+
+	/**
+	 * Generate a unique key that can be used on our requests to stop others
+	 * hijacking our internal oEmbed API
+	 * @return string The site key
+	 */
+	private function get_key() {
+
+		$key = get_option ( 'github_oembed_key' );
+		
+		if ( ! $key ) {
+			$key = md5 ( time() . rand ( 0,65535 ) );
+			add_option ( 'github_oembed_key', $key, '', 'yes' );
+		}
+
+		return $key;
+
+	}
+
+
+
+	/**
+	 * Check whether this is an oembed request, handle if it is
+	 * Ignore it if not.
+	 * Insert rant here about WP's lack of a front-end AJAX handler.
+	 */
+	public function maybe_handle_oembed() {
+
+		if ( isset ( $_GET['github_oembed'] ) ) {
+			return $this->handle_oembed();
+		}
+
+	}
+
+
+
+	/**
+	 * Handle an oembed request
+	 */
+	public function handle_oembed() {
+
+		// Check this request is valid
+		if ( $_GET['github_oembed'] != $this->get_key() ) {
+            header ( 'HTTP/1.0 403 Forbidden' );
+			die ( 'Sad Octocat is sad.' );
+		}
+
+		// Check we have the required information
+		$url = isset ( $_REQUEST['url'] ) ? $_REQUEST['url'] : null;
+		$format = isset ( $_REQUEST['format'] ) ? $_REQUEST['format'] : null;
+
+		if ( ! empty ( $format ) && $format != 'json' ) {
+			header ( 'HTTP/1.0 501 Not implemented' );
+			die ( 'This octocat only does json' );
+		}
+
+		if ( ! $url ) {
+			header ( 'HTTP/1.0 404 Not Found' );
+			die ( 'Octocat is lost, and afraid' );
+		}
+
+		if ( preg_match ( '#https?://github.com/([^/]*)/([^/]*)/?$#i', $url, $matches ) && ! empty ( $matches[2] ) ) {
+
+			$this->oembed_github_repo ( $matches[1], $matches[2] );
+
+		} elseif ( preg_match ( '#https?://github.com/([^/]*)/?$#i', $url, $matches ) ) {
+
+			$this->oembed_github_author ( $matches[1] );
+
+		}
+
+	}
+
+
+
+	/**
+	 * Retrieve the information from github for a repo, and
+	 * output it as an oembed response
+	 */
+	private function oembed_github_repo ( $owner, $repository ) {
+
+		$repository = trim ( $repository, '/' );
+
+		$results = wp_remote_get( "https://api.github.com/repos/$owner/$repository", $args = array (
+		              'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
+
+		if ( is_wp_error( $results ) ||
+		    ! isset ( $results['response']['code'] ) ||
+		    $results['response']['code'] != '200' ) {
+			header ( 'HTTP/1.0 404 Not Found' );
+			die ( 'Octocat is lost, and afraid' );
+		}
+
+		$repo = json_decode ( $results['body'] );
+
+		$results = wp_remote_get( "https://api.github.com/repos/$owner/$repository/commits", $args = array (
+		              'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
+
+		if ( is_wp_error( $results ) ||
+		    ! isset ( $results['response']['code'] ) ||
+		    $results['response']['code'] != '200' ) {
+			header ( 'HTTP/1.0 404 Not Found' );
+			die ( 'Octocat is lost, and afraid' );
+		}
+
+		$commits = json_decode ( $results['body'] );
+
+		$response = new stdClass();
+		$response->type = 'rich';
+		$response->width = '10';
+		$response->height = '10';
+		$response->version = '1.0';
+		$response->title = $repo->description;
+
+		// @TODO This should all be templated
+		$response->html = '<p><a href="'.esc_attr($repo->html_url).'" target="_blank"><strong>'.esc_html($repo->description)."</strong></a><br/>";
+		$response->html .= esc_html($repo->html_url)."<br/>";
+		$response->html .= esc_html($repo->forks_count)." forks.<br/>";
+		$response->html .= esc_html($repo->open_issues_count)." open issues.<br/>";
+
+		if ( count ( $commits ) ) {
+
+			$cnt = 0;
+			$response->html .= 'Recent commits:';
+			$response->html .= '<ul class="github_commits">';
+
+			foreach ( $commits as $commit ) {
+
+				if ($cnt > 4)
+					break;
+
+				$response->html .= '<li class="github_commit">';
+				$response->html .= '<a href="https://github.com/'.$owner.'/'.$repository.'/commit/'.esc_attr($commit->sha).'" target="_blank">'.esc_html($commit->commit->message)."</a>, ";
+				$response->html .= esc_html($commit->commit->committer->name);
+				$response->html .= '</li>';
+				
+				$cnt++;
+
+			}
+
+			$response->html .= '</ul>';
+
+		}
+		$response->html .= '</p>';
+
+		header ( 'Content-Type: application/json' );
+		echo json_encode ( $response );
+		die();
+
+	}
+
+
+
+	/**
+	 * Retrieve the information from github for an author, and output
+	 * it as an oembed response
+	 */
+	private function oembed_github_author ( $owner ) {
+
+		$owner = trim ( $owner, '/' );
+
+		$results = wp_remote_get( "https://api.github.com/users/$owner", $args = array (
+		              'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
+
+		if ( is_wp_error( $results ) ||
+		    ! isset ( $results['response']['code'] ) ||
+		    $results['response']['code'] != '200' ) {
+			header ( 'HTTP/1.0 404 Not Found' );
+			die ( 'Octocat is lost, and afraid' );
+		}
+
+		$owner_info = json_decode ( $results['body'] );
+
+		$response = new stdClass();
+		$response->type = 'rich';
+		$response->width = '10';
+		$response->height = '10';
+		$response->version = '1.0';
+		$response->title = $owner_info->name;
+
+		// @TODO This should all be templated
+		$response->html = '<p><a href="https://github.com/'.esc_attr($owner).'" target="_blank"><strong>'.esc_html($owner)."</strong></a><br/>";
+		$response->html .= esc_html($owner_info->public_repos).' repositories, ';
+		$response->html .= esc_html($owner_info->followers).' followers.</p>';
+
+		header ( 'Content-Type: application/json' );
+		echo json_encode ( $response );
+		die();
+
+	}
+
+}
+
+$github_oembed = new github_oembed();
\ No newline at end of file