ThreeWP Broadcast support for Amazon S3-hosted images

ThreeWP_Broadcast.php

/** ...Continued from within file */
/**
		@brief		Creates a new attachment.
		@details

		The $o object is an extension of Broadcasting_Data and must contain:
		- @i attachment_data An attachment_data object containing the attachmend info.

		@param		object		$o		Options.
		@return		@i int The attachment's new post ID.
		@since		20130530
		@version	20131003
	*/
	public function copy_attachment( $o )
	{
		//File won't exist on disk for Amazon S3 for WordPress with CloudFront uploads
		$AWS_uploaded = isset($o->attachment_data->post_custom['amazonS3_info']);
		if ( !$AWS_uploaded ) {
			$this->debug('Not in AWS');
			if ( ! file_exists( $o->attachment_data->filename_path ) )
				return false;

			// Copy the file to the blog's upload directory
			$upload_dir = wp_upload_dir();

			copy( $o->attachment_data->filename_path, $upload_dir[ 'path' ] . '/' . $o->attachment_data->filename_base );
		} else {
			$this->debug('Uploaded to AWS');
		}
		// And now create the attachment stuff.
		// This is taken almost directly from http://codex.wordpress.org/Function_Reference/wp_insert_attachment
		$wp_filetype = wp_check_filetype( $o->attachment_data->filename_base, null );
		$attachment = [
			'guid' => $upload_dir[ 'url' ] . '/' . $o->attachment_data->filename_base,
			'menu_order' => $o->attachment_data->post->menu_order,
			'post_author' => $o->attachment_data->post->post_author,
			'post_excerpt' => $o->attachment_data->post->post_excerpt,
			'post_mime_type' => $wp_filetype[ 'type' ],
			'post_title' => $o->attachment_data->post->post_title,
			'post_content' => '',
			'post_status' => 'inherit',
		];
		//File won't exist on disk for Amazon S3 for WordPress with CloudFront uploads
		if ( !$AWS_uploaded ) {
			$this->debug('Inserting local attachment');
			$o->attachment_id = wp_insert_attachment( $attachment, $upload_dir[ 'path' ] . '/' . $o->attachment_data->filename_base, $o->attachment_data->post->post_parent );
		} else {
			$this->debug('Inserting AWS attachment');
			$s3_info = maybe_unserialize( reset($o->attachment_data->post_custom['amazonS3_info']) );
			$o->attachment_id = wp_insert_attachment( $attachment, 'http://'.$s3_info['bucket'].'/'.$s3_info['key'], $o->attachment_data->post->post_parent );
			// $o->attachment_id = wp_insert_attachment( $attachment, false, $o->attachment_data->post->post_parent );
		}
		$this->debug('Attachment ID: %s', $o->attachment_id);
		// Now to maybe handle the metadata.
		if ( $o->attachment_data->file_metadata )
		{
			// 1. Create new metadata for this attachment.
			require_once( ABSPATH . "wp-admin" . '/includes/image.php' );
			$attach_data = wp_generate_attachment_metadata( $o->attachment_id, $upload_dir[ 'path' ] . '/' . $o->attachment_data->filename_base );
			$this->debug('Generated attach_data: %s', serialize($attach_data));
			$this->debug('Attachment inherited post_custom: %s', serialize($o->attachment_data->post_custom));
			// 2. Write the old metadata first.
			foreach( $o->attachment_data->post_custom as $key => $value )
			{
				$value = reset( $value );
				$value = maybe_unserialize( $value );
				switch( $key )
				{
					// Some values need to handle completely different upload paths (from different months, for example).
					case '_wp_attached_file':
						if (!$AWS_uploaded) {
							$value = $attach_data[ 'file' ];
						}
						break;
				}
				update_post_meta( $o->attachment_id, $key, $value );
			}

			// 3. Overwrite the metadata that needs to be overwritten with fresh data.
			if (!$AWS_uploaded) {
				wp_update_attachment_metadata( $o->attachment_id,  $attach_data );
			}
		}
	}
/** 	..Continued with rest of file */