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class-wxrwriter.php
161 lines
| 1 | <?php |
| 2 | |
| 3 | namespace WordPress\DataLiberation\EntityWriter; |
| 4 | |
| 5 | use WordPress\ByteStream\WriteStream\ByteWriteStream; |
| 6 | use WordPress\DataLiberation\DataLiberationException; |
| 7 | use WordPress\DataLiberation\ImportEntity; |
| 8 | use WordPress\XML\XMLProcessor; |
| 9 | |
| 10 | class WXRWriter implements EntityWriter { |
| 11 | |
| 12 | private $write_stream; |
| 13 | private $state = self::STATE_WRITING; |
| 14 | private $open_tags = array(); |
| 15 | |
| 16 | const STATE_NEW = 'new'; |
| 17 | const STATE_WRITING = 'writing'; |
| 18 | const STATE_CLOSED = 'closed'; |
| 19 | |
| 20 | public function __construct( ByteWriteStream $write_stream, $cursor = null ) { |
| 21 | $this->write_stream = $write_stream; |
| 22 | |
| 23 | if ( null === $cursor ) { |
| 24 | $this->write_stream->append_bytes( "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<rss version=\"2.0\" xmlns:excerpt=\"http://wordpress.org/export/1.2/excerpt/\" xmlns:content=\"http://purl.org/rss/1.0/modules/content/\" xmlns:wfw=\"http://wellformedweb.org/CommentAPI/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:wp=\"http://wordpress.org/export/1.2/\">\n<channel>\n" ); |
| 25 | } else { |
| 26 | $this->open_tags = json_decode( $cursor, true )['open_tags']; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | public function append_entity( ImportEntity $entity ) { |
| 31 | if ( self::STATE_CLOSED === $this->state ) { |
| 32 | throw new DataLiberationException( 'Cannot write to a closed writer' ); |
| 33 | } |
| 34 | |
| 35 | if ( 'comment' !== $entity->get_type() && ! empty( $this->open_tags ) && 'wp:comments' === end( $this->open_tags ) ) { |
| 36 | $this->write_stream->append_bytes( "</wp:comments>\n" ); |
| 37 | array_pop( $this->open_tags ); |
| 38 | } |
| 39 | |
| 40 | switch ( $entity->get_type() ) { |
| 41 | case 'post': |
| 42 | if ( ! empty( $this->open_tags ) && 'item' === end( $this->open_tags ) ) { |
| 43 | $this->write_stream->append_bytes( "</item>\n" ); |
| 44 | array_pop( $this->open_tags ); |
| 45 | } |
| 46 | $this->write_stream->append_bytes( "<item>\n" ); |
| 47 | $this->open_tags[] = 'item'; |
| 48 | $this->append_if_not_empty( 'title', $entity->get_data()['post_title'] ); |
| 49 | $this->append_if_not_empty( 'pubDate', $entity->get_data()['post_date'] ); |
| 50 | $this->append_if_not_empty( 'guid', $entity->get_data()['guid'] ); |
| 51 | $this->append_if_not_empty( 'description', $entity->get_data()['description'] ); |
| 52 | $this->append_if_not_empty( 'content:encoded', $entity->get_data()['content'] ); |
| 53 | $this->append_if_not_empty( 'excerpt:encoded', $entity->get_data()['excerpt'] ); |
| 54 | $this->append_if_not_empty( 'wp:post_id', $entity->get_data()['post_id'] ); |
| 55 | $this->append_if_not_empty( 'wp:post_date', $entity->get_data()['post_date'] ); |
| 56 | $this->append_if_not_empty( 'wp:post_date_gmt', $entity->get_data()['post_date_gmt'] ); |
| 57 | $this->append_if_not_empty( 'wp:comment_status', $entity->get_data()['comment_status'] ); |
| 58 | $this->append_if_not_empty( 'wp:ping_status', $entity->get_data()['ping_status'] ); |
| 59 | $this->append_if_not_empty( 'wp:post_name', $entity->get_data()['post_name'] ); |
| 60 | $this->append_if_not_empty( 'wp:status', $entity->get_data()['status'] ); |
| 61 | $this->append_if_not_empty( 'wp:post_parent', $entity->get_data()['post_parent'] ); |
| 62 | $this->append_if_not_empty( 'wp:menu_order', $entity->get_data()['menu_order'] ); |
| 63 | $this->append_if_not_empty( 'wp:post_type', $entity->get_data()['post_type'] ); |
| 64 | $this->append_if_not_empty( 'wp:post_password', $entity->get_data()['post_password'] ); |
| 65 | $this->append_if_not_empty( 'wp:is_sticky', $entity->get_data()['is_sticky'] ); |
| 66 | break; |
| 67 | case 'post_meta': |
| 68 | if ( empty( $this->open_tags ) || 'item' !== end( $this->open_tags ) ) { |
| 69 | throw new DataLiberationException( 'Cannot append post_meta without a corresponding post' ); |
| 70 | } |
| 71 | $meta = $entity->get_data(); |
| 72 | $this->write_stream->append_bytes( "<wp:postmeta>\n" ); |
| 73 | $this->append_if_not_empty( 'wp:meta_key', $meta['meta_key'] ); |
| 74 | $this->append_if_not_empty( 'wp:meta_value', $meta['meta_value'] ); |
| 75 | $this->write_stream->append_bytes( "</wp:postmeta>\n" ); |
| 76 | break; |
| 77 | case 'term': |
| 78 | if ( empty( $this->open_tags ) || 'item' !== end( $this->open_tags ) ) { |
| 79 | throw new DataLiberationException( 'Cannot append term without a corresponding post' ); |
| 80 | } |
| 81 | $term = $entity->get_data(); |
| 82 | $this->write_stream->append_bytes( "<wp:term>\n" ); |
| 83 | $this->append_if_not_empty( 'wp:term_id', $term['term_id'] ); |
| 84 | $this->append_if_not_empty( 'wp:term_taxonomy', $term['taxonomy'] ); |
| 85 | $this->append_if_not_empty( 'wp:term_slug', $term['slug'] ); |
| 86 | $this->append_if_not_empty( 'wp:term_parent', $term['parent'] ); |
| 87 | $this->write_stream->append_bytes( "</wp:term>\n" ); |
| 88 | break; |
| 89 | case 'comment': |
| 90 | if ( empty( $this->open_tags ) ) { |
| 91 | throw new DataLiberationException( 'Cannot append comment without a corresponding post' ); |
| 92 | } |
| 93 | if ( 'item' === end( $this->open_tags ) ) { |
| 94 | $this->write_stream->append_bytes( "<wp:comments>\n" ); |
| 95 | $this->open_tags[] = 'wp:comments'; |
| 96 | } |
| 97 | if ( 'wp:comments' !== end( $this->open_tags ) ) { |
| 98 | throw new DataLiberationException( 'Cannot append comment outside of a comment list' ); |
| 99 | } |
| 100 | $comment = $entity->get_data(); |
| 101 | $this->write_stream->append_bytes( "<wp:comment>\n" ); |
| 102 | $this->append_if_not_empty( 'wp:comment_id', $comment['comment_id'] ); |
| 103 | $this->append_if_not_empty( 'wp:comment_author', $comment['comment_author'] ); |
| 104 | $this->append_if_not_empty( 'wp:comment_author_email', $comment['comment_author_email'] ); |
| 105 | $this->append_if_not_empty( 'wp:comment_author_url', $comment['comment_author_url'] ); |
| 106 | $this->append_if_not_empty( 'wp:comment_author_IP', $comment['comment_author_IP'] ); |
| 107 | $this->append_if_not_empty( 'wp:comment_date', $comment['comment_date'] ); |
| 108 | $this->append_if_not_empty( 'wp:comment_date_gmt', $comment['comment_date_gmt'] ); |
| 109 | $this->append_if_not_empty( 'wp:comment_content', $comment['comment_content'] ); |
| 110 | $this->append_if_not_empty( 'wp:comment_approved', $comment['comment_approved'] ); |
| 111 | $this->append_if_not_empty( 'wp:comment_type', $comment['comment_type'] ); |
| 112 | $this->append_if_not_empty( 'wp:comment_parent', $comment['comment_parent'] ); |
| 113 | $this->append_if_not_empty( 'wp:comment_user_id', $comment['comment_user_id'] ); |
| 114 | $this->write_stream->append_bytes( "</wp:comment>\n" ); |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | private function append_if_not_empty( $tag_name, &$content ) { |
| 120 | if ( null !== $content ) { |
| 121 | $this->write_stream->append_bytes( $this->create_xml_tag( $tag_name, $content ) ); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | private function create_xml_tag( $tag_name, $content ) { |
| 126 | $xml = XMLProcessor::create_from_string( |
| 127 | "<$tag_name>text</$tag_name>\n", |
| 128 | null, |
| 129 | 'UTF-8', |
| 130 | array( |
| 131 | 'excerpt' => 'http://wordpress.org/export/1.2/excerpt/', |
| 132 | 'content' => 'http://purl.org/rss/1.0/modules/content/', |
| 133 | 'wfw' => 'http://wellformedweb.org/CommentAPI/', |
| 134 | 'dc' => 'http://purl.org/dc/elements/1.1/', |
| 135 | 'wp' => 'http://wordpress.org/export/1.2/', |
| 136 | ) |
| 137 | ); |
| 138 | $xml->next_token(); // Move to the opening tag. |
| 139 | $xml->next_token(); // Move to the text node. |
| 140 | $xml->set_modifiable_text( $content ); |
| 141 | |
| 142 | return $xml->get_updated_xml(); |
| 143 | } |
| 144 | |
| 145 | public function finalize() { |
| 146 | while ( ! empty( $this->open_tags ) ) { |
| 147 | $tag = array_pop( $this->open_tags ); |
| 148 | $this->write_stream->append_bytes( "</$tag>\n" ); |
| 149 | } |
| 150 | $this->write_stream->append_bytes( "</channel>\n</rss>\n" ); |
| 151 | } |
| 152 | |
| 153 | public function close_writing() { |
| 154 | $this->state = self::STATE_CLOSED; |
| 155 | } |
| 156 | |
| 157 | public function get_reentrancy_cursor(): string { |
| 158 | return json_encode( array( 'open_tags' => $this->open_tags ) ); |
| 159 | } |
| 160 | } |
| 161 |