/*
- * Sone - SoneTextParser.java - Copyright © 2010–2013 David Roden
+ * Sone - SoneTextParser.java - Copyright © 2010–2016 David Roden
*
* 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
package net.pterodactylus.sone.text;
+import static com.google.common.base.Optional.absent;
+import static com.google.common.base.Optional.of;
import static java.util.logging.Logger.getLogger;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
+import java.io.StringReader;
import java.net.MalformedURLException;
+import java.util.ArrayList;
+import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
import net.pterodactylus.sone.data.Post;
import net.pterodactylus.sone.data.Sone;
import net.pterodactylus.sone.data.impl.IdOnlySone;
import net.pterodactylus.sone.database.PostProvider;
import net.pterodactylus.sone.database.SoneProvider;
-import net.pterodactylus.util.io.Closer;
import com.google.common.base.Optional;
+import org.bitpedia.util.Base32;
import freenet.keys.FreenetURI;
+import freenet.support.Base64;
/**
* {@link Parser} implementation that can recognize Freenet URIs.
/** Pattern to detect whitespace. */
private static final Pattern whitespacePattern = Pattern.compile("[\\u000a\u0020\u00a0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u200c\u200d\u202f\u205f\u2060\u2800\u3000]");
+ private static class NextLink {
+
+ private final int position;
+ private final String link;
+ private final String remainder;
+ private final LinkType linkType;
+
+ private NextLink(int position, String link, String remainder, LinkType linkType) {
+ this.position = position;
+ this.link = link;
+ this.remainder = remainder;
+ this.linkType = linkType;
+ }
+
+ public int getPosition() {
+ return position;
+ }
+
+ public String getLink() {
+ return link;
+ }
+
+ public String getRemainder() {
+ return remainder;
+ }
+
+ public LinkType getLinkType() {
+ return linkType;
+ }
+
+ }
+
/**
* Enumeration for all recognized link types.
*
HTTP("http://", false),
HTTPS("https://", false),
SONE("sone://", false),
- POST("post://", false);
+ POST("post://", false),
+
+ FREEMAIL("", true) {
+ @Override
+ public Optional<NextLink> findNext(String line) {
+ int nextFreemailSuffix = line.indexOf(".freemail");
+ if (nextFreemailSuffix < 54) {
+ /* 52 chars for the id, 1 on @, at least 1 for the local part. */
+ return absent();
+ }
+ if (line.charAt(nextFreemailSuffix - 53) != '@') {
+ return absent();
+ }
+ if (!line.substring(nextFreemailSuffix - 52, nextFreemailSuffix).matches("^[a-z2-7]*$")) {
+ return absent();
+ }
+ int startOfLocalPart = nextFreemailSuffix - 54;
+ if (!isAllowedInLocalPart(line.charAt(startOfLocalPart))) {
+ return absent();
+ }
+ while ((startOfLocalPart > 0) && isAllowedInLocalPart(line.charAt(startOfLocalPart - 1))) {
+ startOfLocalPart--;
+ }
+ return of(new NextLink(startOfLocalPart, line.substring(startOfLocalPart, nextFreemailSuffix + 9), line.substring(nextFreemailSuffix + 9), this));
+ }
+
+ private boolean isAllowedInLocalPart(char character) {
+ return ((character >= 'A') && (character <= 'Z'))
+ || ((character >= 'a') && (character <= 'z'))
+ || ((character >= '0') && (character <= '9'))
+ || (character == '.') || (character == '-') || (character == '_');
+ }
+ };
private final String scheme;
private final boolean freenetLink;
return freenetLink;
}
+ public Optional<NextLink> findNext(String line) {
+ int nextLinkPosition = line.indexOf(getScheme());
+ if (nextLinkPosition == -1) {
+ return absent();
+ }
+ int endOfLink = findEndOfLink(line.substring(nextLinkPosition));
+ return of(new NextLink(nextLinkPosition, line.substring(nextLinkPosition, nextLinkPosition + endOfLink), line.substring(nextLinkPosition + endOfLink), this));
+ }
+
+ private static int findEndOfLink(String line) {
+ Matcher matcher = whitespacePattern.matcher(line);
+ int endOfLink = matcher.find() ? matcher.start() : line.length();
+ while (isPunctuation(line.charAt(endOfLink - 1))) {
+ endOfLink--;
+ }
+ int openParens = 0;
+ for (int i = 0; i < endOfLink; i++) {
+ switch (line.charAt(i)) {
+ case '(':
+ openParens++;
+ break;
+ case ')':
+ openParens--;
+ if (openParens < 0) {
+ return i;
+ }
+ default:
+ }
+ }
+ return endOfLink;
+ }
+
}
/** The Sone provider. */
/**
* {@inheritDoc}
*/
+ @Nonnull
@Override
- public Iterable<Part> parse(SoneTextParserContext context, Reader source) throws IOException {
- PartContainer parts = new PartContainer();
- BufferedReader bufferedReader = (source instanceof BufferedReader) ? (BufferedReader) source : new BufferedReader(source);
- try {
+ public Iterable<Part> parse(@Nonnull String source, @Nullable SoneTextParserContext context) {
+ List<Part> parts = new ArrayList<>();
+ try (Reader sourceReader = new StringReader(source);
+ BufferedReader bufferedReader = new BufferedReader(sourceReader)) {
String line;
boolean lastLineEmpty = true;
int emptyLines = 0;
*/
boolean lineComplete = true;
while (line.length() > 0) {
- Optional<NextLink> nextLink = NextLink.findNextLink(line);
+ Optional<NextLink> nextLink = findNextLink(line);
if (!nextLink.isPresent()) {
if (lineComplete && !lastLineEmpty) {
parts.add(new PlainTextPart("\n" + line));
if (next > 0) {
parts.add(new PlainTextPart(line.substring(0, next)));
line = line.substring(next);
- next = 0;
}
lineComplete = false;
- Matcher matcher = whitespacePattern.matcher(line);
- int nextSpace = matcher.find(0) ? matcher.start() : line.length();
- String link = line.substring(0, nextSpace);
- String name = link;
+ String link = nextLink.get().getLink();
logger.log(Level.FINER, String.format("Found link: %s", link));
/* if there is no text after the scheme, it’s not a link! */
continue;
}
- if (linkType == LinkType.SONE) {
- if (line.length() >= (7 + 43)) {
- String soneId = line.substring(7, 50);
- Optional<Sone> sone = soneProvider.getSone(soneId);
- if (!sone.isPresent()) {
- /*
- * don’t use create=true above, we don’t want
- * the empty shell.
- */
- sone = Optional.<Sone>of(new IdOnlySone(soneId));
- }
- parts.add(new SonePart(sone.get()));
- line = line.substring(50);
- } else {
- parts.add(new PlainTextPart(line));
- line = "";
- }
- continue;
- }
- if (linkType == LinkType.POST) {
- if (line.length() >= (7 + 36)) {
- String postId = line.substring(7, 43);
- Optional<Post> post = postProvider.getPost(postId);
- if (post.isPresent()) {
- parts.add(new PostPart(post.get()));
- } else {
- parts.add(new PlainTextPart(line.substring(0, 43)));
- }
- line = line.substring(43);
- } else {
- parts.add(new PlainTextPart(line));
- line = "";
- }
- continue;
+ switch (linkType) {
+ case SONE:
+ renderSoneLink(parts, link);
+ break;
+ case POST:
+ renderPostLink(parts, link);
+ break;
+ case KSK:
+ case CHK:
+ case SSK:
+ case USK:
+ renderFreenetLink(parts, link, linkType, context);
+ break;
+ case HTTP:
+ case HTTPS:
+ renderHttpLink(parts, link, linkType);
+ break;
+ case FREEMAIL:
+ renderFreemailLink(parts, link);
}
- if ((linkType == LinkType.KSK) || (linkType == LinkType.CHK) || (linkType == LinkType.SSK) || (linkType == LinkType.USK)) {
- FreenetURI uri;
- if (name.indexOf('?') > -1) {
- name = name.substring(0, name.indexOf('?'));
- }
- if (name.endsWith("/")) {
- name = name.substring(0, name.length() - 1);
- }
- try {
- 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 == LinkType.SSK) || (linkType == LinkType.USK)) && (context != null) && (context.getPostingSone() != null) && link.substring(4, Math.min(link.length(), 47)).equals(context.getPostingSone().getId());
- parts.add(new FreenetLinkPart(link, name, fromPostingSone));
- } catch (MalformedURLException mue1) {
- /* not a valid link, insert as plain text. */
- parts.add(new PlainTextPart(link));
- } catch (NullPointerException npe1) {
- /* FreenetURI sometimes throws these, too. */
- parts.add(new PlainTextPart(link));
- } catch (ArrayIndexOutOfBoundsException aioobe1) {
- /* oh, and these, too. */
- parts.add(new PlainTextPart(link));
- }
- } else if ((linkType == LinkType.HTTP) || (linkType == LinkType.HTTPS)) {
- name = link.substring(linkType == LinkType.HTTP ? 7 : 8);
- 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('?'));
- }
- parts.add(new LinkPart(link, name));
- }
- line = line.substring(nextSpace);
+ line = nextLink.get().getRemainder();
}
lastLineEmpty = false;
}
- } finally {
- if (bufferedReader != source) {
- Closer.close(bufferedReader);
- }
+ } catch (IOException ioe1) {
+ // a buffered reader around a string reader should never throw.
+ throw new RuntimeException(ioe1);
}
for (int partIndex = parts.size() - 1; partIndex >= 0; --partIndex) {
- Part part = parts.getPart(partIndex);
- if (!(part instanceof PlainTextPart) || !"\n".equals(((PlainTextPart) part).getText())) {
+ Part part = parts.get(partIndex);
+ if (!(part instanceof PlainTextPart) || !"\n".equals(part.getText())) {
break;
}
- parts.removePart(partIndex);
+ parts.remove(partIndex);
}
return parts;
}
- private static class NextLink {
-
- private final int position;
- private final LinkType linkType;
-
- private NextLink(int position, LinkType linkType) {
- this.position = position;
- this.linkType = linkType;
+ public static Optional<NextLink> findNextLink(String line) {
+ int earliestLinkPosition = Integer.MAX_VALUE;
+ NextLink earliestNextLink = null;
+ for (LinkType possibleLinkType : LinkType.values()) {
+ Optional<NextLink> nextLink = possibleLinkType.findNext(line);
+ if (nextLink.isPresent()) {
+ if (nextLink.get().getPosition() < earliestLinkPosition) {
+ earliestNextLink = nextLink.get();
+ earliestLinkPosition = earliestNextLink.getPosition();
+ }
+ }
}
+ return Optional.fromNullable(earliestNextLink);
+ }
- public int getPosition() {
- return position;
+ private void renderSoneLink(List<Part> parts, String line) {
+ if (line.length() >= (7 + 43)) {
+ String soneId = line.substring(7, 50);
+ Optional<Sone> sone = soneProvider.getSone(soneId);
+ parts.add(new SonePart(sone.or(new IdOnlySone(soneId))));
+ } else {
+ parts.add(new PlainTextPart(line));
}
+ }
- public LinkType getLinkType() {
- return linkType;
+ private void renderPostLink(List<Part> parts, String line) {
+ if (line.length() >= (7 + 36)) {
+ String postId = line.substring(7, 43);
+ Optional<Post> post = postProvider.getPost(postId);
+ if (post.isPresent()) {
+ parts.add(new PostPart(post.get()));
+ } else {
+ parts.add(new PlainTextPart(line.substring(0, 43)));
+ }
+ } else {
+ parts.add(new PlainTextPart(line));
}
+ }
- public static Optional<NextLink> findNextLink(String line) {
- int earliestLinkPosition = Integer.MAX_VALUE;
- LinkType linkType = null;
- for (LinkType possibleLinkType : LinkType.values()) {
- int nextLinkPosition = line.indexOf(possibleLinkType.getScheme());
- if (nextLinkPosition > -1) {
- if (nextLinkPosition < earliestLinkPosition) {
- earliestLinkPosition = nextLinkPosition;
- linkType = possibleLinkType;
- }
- }
+ private void renderFreenetLink(List<Part> parts, String link, LinkType linkType, @Nullable SoneTextParserContext context) {
+ String name = link;
+ String linkWithoutParameters = link;
+ if (name.indexOf('?') > -1) {
+ linkWithoutParameters = 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()));
}
- return earliestLinkPosition < Integer.MAX_VALUE ?
- Optional.of(new NextLink(earliestLinkPosition, linkType)) : Optional.<NextLink>absent();
+ boolean fromPostingSone = ((linkType == LinkType.SSK) || (linkType == LinkType.USK)) && (context != null) && (context.getPostingSone() != null) && link.substring(4, Math.min(link.length(), 47)).equals(context.getPostingSone().getId());
+ parts.add(new FreenetLinkPart(link, name, linkWithoutParameters, fromPostingSone));
+ } catch (MalformedURLException mue1) {
+ /* not a valid link, insert as plain text. */
+ parts.add(new PlainTextPart(link));
+ } catch (NullPointerException npe1) {
+ /* FreenetURI sometimes throws these, too. */
+ parts.add(new PlainTextPart(link));
+ } catch (ArrayIndexOutOfBoundsException aioobe1) {
+ /* oh, and these, too. */
+ parts.add(new PlainTextPart(link));
+ }
+ }
+
+ private void renderHttpLink(List<Part> parts, String link, LinkType linkType) {
+ String name = link.substring(linkType == LinkType.HTTP ? 7 : 8);
+ 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('?'));
+ }
+ parts.add(new LinkPart(link, name));
+ }
+
+ private void renderFreemailLink(List<Part> parts, String line) {
+ int separator = line.indexOf('@');
+ String freemailId = line.substring(separator + 1, separator + 53);
+ String identityId = Base64.encode(Base32.decode(freemailId));
+ String emailLocalPart = line.substring(0, separator);
+ parts.add(new FreemailPart(emailLocalPart, freemailId, identityId));
+ }
+ private static boolean isPunctuation(char character) {
+ return (character == '.') || (character == ',') || (character == '!') || (character == '?');
}
}
projects / Sone.git / blobdiff