+ }
+
+ private boolean linkMatchesPostingSone(SoneTextParserContext context, String link) {
+ return (context != null) && (context.getPostingSone() != null) && link.substring(4, Math.min(link.length(), 47)).equals(context.getPostingSone().getId());
+ }
+
+ private boolean lineIsLongEnoughToContainAPostLink(String line) {
+ return line.length() >= (7 + 36);
+ }
+
+ private static boolean lineIsLongEnoughToContainASoneLink(String line) {
+ return line.length() >= (7 + 43);
+ }
+
+ private int findNextWhitespaceOrEndOfLine(String line) {
+ Matcher matcher = whitespacePattern.matcher(line);
+ return matcher.find(0) ? matcher.start() : line.length();
+ }
+
+ private Optional<NextLink> findNextLink(String line) {
+ EnumMap<LinkType, Integer> linkTypeIndexes = new EnumMap<LinkType, Integer>(LinkType.class);
+ for (LinkType linkType : LinkType.values()) {
+ int index = line.indexOf(linkType.getScheme());
+ if (index != -1) {
+ linkTypeIndexes.put(linkType, index);
+ }
+ }
+ if (linkTypeIndexes.isEmpty()) {
+ return absent();
+ }
+ Entry<LinkType, Integer> smallestEntry = from(linkTypeIndexes.entrySet()).toSortedList(locateSmallestIndex()).get(0);
+ return of(new NextLink(smallestEntry.getValue(), smallestEntry.getKey()));
+ }
+
+ private Comparator<Entry<LinkType, Integer>> locateSmallestIndex() {
+ return new Comparator<Entry<LinkType, Integer>>() {
+ @Override
+ public int compare(Entry<LinkType, Integer> leftEntry, Entry<LinkType, Integer> rightEntry) {
+ return leftEntry.getValue() - rightEntry.getValue();
+ }
+ };
+ }
+
+ private class PartCreators {
+
+ private final Map<LinkType, PartCreator> partCreators = ImmutableMap.<LinkType, PartCreator>builder()
+ .put(LinkType.SONE, new SonePartCreator())
+ .put(LinkType.POST, new PostPartCreator())
+ .put(LinkType.KSK, new FreenetLinkPartCreator(LinkType.KSK))
+ .put(LinkType.CHK, new FreenetLinkPartCreator(LinkType.CHK))
+ .put(LinkType.SSK, new FreenetLinkPartCreator(LinkType.SSK))
+ .put(LinkType.USK, new FreenetLinkPartCreator(LinkType.USK))
+ .put(LinkType.HTTP, new InternetLinkPartCreator(LinkType.HTTP))
+ .put(LinkType.HTTPS, new InternetLinkPartCreator(LinkType.HTTPS))
+ .build();
+
+ public Optional<Part> createPart(LinkType linkType, String line, SoneTextParserContext context) {
+ if (line.equals(linkType.getScheme())) {
+ return of((Part) new PlainTextPart(line));
+ }
+ return partCreators.get(linkType).createPart(line, context);
+ }
+
+ }
+
+ private class SonePartCreator implements PartCreator {
+
+ @Override
+ public Optional<Part> createPart(String line, SoneTextParserContext context) {
+ if (!lineIsLongEnoughToContainASoneLink(line)) {
+ return absent();
+ }
+ String soneId = line.substring(7, 50);
+ Optional<Sone> sone = database.getSone(soneId);
+ if (!sone.isPresent()) {
+ return absent();
+ }
+ return Optional.<Part>of(new SonePart(sone.get()));
+ }
+
+ }
+
+ private class PostPartCreator implements PartCreator {
+
+ @Override
+ public Optional<Part> createPart(String line, SoneTextParserContext context) {
+ if (!lineIsLongEnoughToContainAPostLink(line)) {
+ return absent();
+ }
+ String postId = line.substring(7, 43);
+ Optional<Post> post = database.getPost(postId);
+ if (!post.isPresent()) {
+ return absent();
+ }
+ return Optional.<Part>of(new PostPart(post.get()));
+ }
+
+ }
+
+ private class FreenetLinkPartCreator implements PartCreator {
+
+ private final LinkType linkType;
+
+ protected FreenetLinkPartCreator(LinkType linkType) {
+ this.linkType = linkType;
+ }
+
+ @Override
+ public Optional<Part> createPart(String link, SoneTextParserContext context) {
+ String name = link;
+ if (name.indexOf('?') > -1) {
+ name = name.substring(0, name.indexOf('?'));
+ }
+ if (name.endsWith("/")) {
+ name = name.substring(0, name.length() - 1);
+ }
+ try {
+ FreenetURI uri = new FreenetURI(name);
+ name = uri.lastMetaString();
+ if (name == null) {
+ name = uri.getDocName();
+ }
+ if (name == null) {
+ name = link.substring(0, Math.min(9, link.length()));
+ }
+ boolean fromPostingSone = linkType.isSigned() && linkMatchesPostingSone(context, link);
+ return Optional.<Part>of(new FreenetLinkPart(link, name, fromPostingSone));
+ } catch (MalformedURLException mue1) {
+ /* ignore. */
+ } catch (NullPointerException npe1) {
+ /* ignore. */
+ } catch (ArrayIndexOutOfBoundsException aioobe1) {
+ /* ignore. */
+ }
+ return absent();
+ }
+
+ }
+
+ private class InternetLinkPartCreator implements PartCreator {
+
+ private final LinkType linkType;
+
+ private InternetLinkPartCreator(LinkType linkType) {
+ this.linkType = linkType;
+ }
+
+ @Override
+ public Optional<Part> createPart(String link, SoneTextParserContext context) {
+ String name = link;
+ name = link.substring(linkType.getScheme().length());
+ int firstSlash = name.indexOf('/');
+ int lastSlash = name.lastIndexOf('/');
+ if ((lastSlash - firstSlash) > 3) {
+ name = name.substring(0, firstSlash + 1) + "…" + name.substring(lastSlash);
+ }
+ if (name.endsWith("/")) {
+ name = name.substring(0, name.length() - 1);
+ }
+ if (((name.indexOf('/') > -1) && (name.indexOf('.') < name.lastIndexOf('.', name.indexOf('/'))) || ((name.indexOf('/') == -1) && (name.indexOf('.') < name.lastIndexOf('.')))) && name.startsWith("www.")) {
+ name = name.substring(4);
+ }
+ if (name.indexOf('?') > -1) {
+ name = name.substring(0, name.indexOf('?'));
+ }
+ return Optional.<Part>of(new LinkPart(link, name));
+ }
+
+ }
+
+ private interface PartCreator {
+
+ Optional<Part> createPart(String line, SoneTextParserContext context);
+
+ }
+
+ /**
+ * Container for position and type of the next link in a line.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+ private static class NextLink {
+
+ private final int nextIndex;
+ private final LinkType linkType;
+
+ private NextLink(int nextIndex, LinkType linkType) {
+ this.nextIndex = nextIndex;
+ this.linkType = linkType;
+ }
+
+ private int getNextIndex() {
+ return nextIndex;
+ }
+
+ private LinkType getLinkType() {
+ return linkType;
+ }
+