Automattic\Jetpack\Changelog\KeepAChangelogParser::parse()

Complexity

Conditions	26
Paths	124

Size

Total Lines

156

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php // phpcs:ignore WordPress.Files.FileName.NotHyphenatedLowercase
	public function parse( $changelog ) {
		$ret = new Changelog();

		$bullet = $this->bullet . ' ';
		$len    = strlen( $bullet );
		$indent = str_repeat( ' ', $len );

		// Fix newlines and expand tabs.
		$changelog = strtr( $changelog, array( "\r\n" => "\n" ) );
		$changelog = strtr( $changelog, array( "\r" => "\n" ) );
		while ( strpos( $changelog, "\t" ) !== false ) {
			$changelog = preg_replace_callback(
				'/^([^\t\n]*)\t/m',
				function ( $m ) {
					return $m[1] . str_repeat( ' ', 4 - ( mb_strlen( $m[1] ) % 4 ) );
				},
				$changelog
			);
		}

		// Extract link definitions.
		$links     = array();
		$usedlinks = array();
		while ( ( $m = $this->endsInLink( $changelog ) ) ) { // phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
			$links[ $m['id'] ]     = $m['link'];
			$usedlinks[ $m['id'] ] = false;
			$changelog             = (string) substr( $changelog, 0, -strlen( $m['match'] ) );
		}
		$links = array_reverse( $links );

		// Everything up to the first level-2 ATX heading is the prologue.
		list( $prologue, $changelog ) = $this->split( "\n$changelog", "\n## " );
		$ret->setPrologue( $prologue );

		// Entries make up the rest of the document.
		$entries = array();
		while ( '' !== $changelog ) {
			// Extract the first entry from the changelog file, then extract the heading from it.
			list( $content, $changelog ) = $this->split( $changelog, "\n## " );
			list( $heading, $content )   = $this->split( $content, "\n" );

			// Parse the heading and create a ChangelogEntry for it.
			if ( ! preg_match( '/^## +(\[?[^] ]+\]?) - (.+?) *$/', $heading, $m ) ) {
				throw new InvalidArgumentException( "Invalid heading: $heading" );
			}
			$link      = null;
			$version   = $m[1];
			$timestamp = $m[2];
			if ( '[' === $version[0] && ']' === substr( $version, -1 ) ) {
				$version = substr( $version, 1, -1 );
				if ( ! isset( $links[ $version ] ) ) {
					throw new InvalidArgumentException( "Heading seems to have a linked version, but link was not found: $heading" );
				}
				$link                  = $links[ $version ];
				$usedlinks[ $version ] = true;
			}
			try {
				$timestamp = new DateTime( $timestamp, new DateTimeZone( 'UTC' ) );
			} catch ( \Exception $ex ) {
				throw new InvalidArgumentException( "Heading has an invalid timestamp: $heading", 0, $ex );
			}
			if ( strtotime( $m[2], 0 ) !== strtotime( $m[2], 1000000000 ) ) {
				throw new InvalidArgumentException( "Heading has a relative timestamp: $heading" );
			}
			$entry     = $this->newChangelogEntry(
				$version,
				array(
					'link'      => $link,
					'timestamp' => $timestamp,
				)
			);
			$entries[] = $entry;

			// Extract the prologue, if any.
			list( $prologue, $content ) = $this->split( "\n$content", "\n### ", "\n$bullet" );
			$entry->setPrologue( $prologue );

			if ( '' === $content ) {
				// Huh, no changes.
				continue;
			}

			// Inject an empty heading if necessary so the change parsing can be more straightforward.
			if ( '#' !== $content[0] ) {
				$content = "### \n$content";
			}

			// Now parse all the subheadings and changes.
			while ( '' !== $content ) {
				list( $section, $content )    = $this->split( $content, "\n### " );
				list( $subheading, $section ) = $this->split( $section, "\n" );
				$subheading                   = trim( substr( $subheading, 4 ) );
				$changes                      = array();
				$cur                          = '';
				$section                      = explode( "\n", $section );
				while ( $section ) {

The expression $section of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.

					$line   = array_shift( $section );
					$prefix = substr( $line, 0, $len );
					if ( $prefix === $bullet ) {
						$cur = trim( $cur );
						if ( '' !== $cur ) {
							$changes[] = $cur;
						}
						$cur = substr( $line, $len ) . "\n";
					} elseif ( $prefix === $indent ) {
						$cur .= substr( $line, $len ) . "\n";
					} elseif ( '' === $line ) {
						$cur .= "\n";
					} else {
						// If there are no more subsections and the rest of the lines don't contain
						// bullets, assume it's an epilogue. Otherwise, assume it's an error.
						$section = $line . "\n" . implode( "\n", $section );
						if ( '' === $content && strpos( $section, "\n$bullet" ) === false ) {
							$entry->setEpilogue( $section );
							break;
						} else {
							throw new InvalidArgumentException( "Malformatted changes list near \"$line\"" );
						}
					}
				}
				$cur = trim( $cur );
				if ( '' !== $cur ) {
					$changes[] = $cur;
				}
				foreach ( $changes as $change ) {
					$author = '';
					if ( $this->parseAuthors && preg_match( '/ \(([^()\n]+)\)$/', $change, $m ) ) {
						$author = $m[1];
						$change = substr( $change, 0, -strlen( $m[0] ) );
					}
					$entry->appendChange(
						$this->newChangeEntry(
							array(
								'subheading' => $subheading,
								'author'     => $author,
								'content'    => $change,
								'timestamp'  => $timestamp,
							)
						)
					);
				}
			}
		}
		$ret->setEntries( $entries );

		// Append any unused links to the epilogue.
		$epilogue = $ret->getEpilogue();
		foreach ( $links as $id => $content ) {
			if ( empty( $usedlinks[ $id ] ) ) {
				$epilogue .= "\n[$id]: $content";
			}
		}
		$ret->setEpilogue( $epilogue );

		return $ret;
	}