--- /dev/null
+/*
+ * Sone - FreenetLinkParser.java - Copyright © 2010 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.text;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.io.Writer;
+import java.net.MalformedURLException;
+import java.util.Iterator;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import net.pterodactylus.sone.core.Core;
+import net.pterodactylus.sone.data.Post;
+import net.pterodactylus.sone.data.Sone;
+import net.pterodactylus.sone.template.SoneAccessor;
+import net.pterodactylus.util.logging.Logging;
+import net.pterodactylus.util.template.Template;
+import net.pterodactylus.util.template.TemplateContextFactory;
+import net.pterodactylus.util.template.TemplateParser;
+import freenet.keys.FreenetURI;
+
+/**
+ * {@link Parser} implementation that can recognize Freenet URIs.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class SoneTextParser implements Parser<SoneTextParserContext> {
+
+ /** The logger. */
+ private static final Logger logger = Logging.getLogger(SoneTextParser.class);
+
+ /** 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]");
+
+ /**
+ * Enumeration for all recognized link types.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+ private enum LinkType {
+
+ /** Link is a KSK. */
+ KSK,
+
+ /** Link is a CHK. */
+ CHK,
+
+ /** Link is an SSK. */
+ SSK,
+
+ /** Link is a USK. */
+ USK,
+
+ /** Link is HTTP. */
+ HTTP,
+
+ /** Link is HTTPS. */
+ HTTPS,
+
+ /** Link is a Sone. */
+ SONE,
+
+ /** Link is a post. */
+ POST,
+
+ }
+
+ /** The core. */
+ private final Core core;
+
+ /**
+ * Creates a new freenet link parser.
+ *
+ * @param core
+ * The core
+ */
+ public SoneTextParser(Core core) {
+ this.core = core;
+ }
+
+ //
+ // PART METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @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);
+ String line;
+ boolean lastLineEmpty = true;
+ int emptyLines = 0;
+ while ((line = bufferedReader.readLine()) != null) {
+ if (line.trim().length() == 0) {
+ if (lastLineEmpty) {
+ continue;
+ }
+ parts.add(new PlainTextPart("\n"));
+ ++emptyLines;
+ lastLineEmpty = emptyLines == 2;
+ continue;
+ }
+ emptyLines = 0;
+ boolean lineComplete = true;
+ while (line.length() > 0) {
+ int nextKsk = line.indexOf("KSK@");
+ int nextChk = line.indexOf("CHK@");
+ int nextSsk = line.indexOf("SSK@");
+ int nextUsk = line.indexOf("USK@");
+ int nextHttp = line.indexOf("http://");
+ int nextHttps = line.indexOf("https://");
+ int nextSone = line.indexOf("sone://");
+ int nextPost = line.indexOf("post://");
+ if ((nextKsk == -1) && (nextChk == -1) && (nextSsk == -1) && (nextUsk == -1) && (nextHttp == -1) && (nextHttps == -1) && (nextSone == -1) && (nextPost == -1)) {
+ if (lineComplete && !lastLineEmpty) {
+ parts.add(new PlainTextPart("\n" + line));
+ } else {
+ parts.add(new PlainTextPart(line));
+ }
+ break;
+ }
+ int next = Integer.MAX_VALUE;
+ LinkType linkType = null;
+ if ((nextKsk > -1) && (nextKsk < next)) {
+ next = nextKsk;
+ linkType = LinkType.KSK;
+ }
+ if ((nextChk > -1) && (nextChk < next)) {
+ next = nextChk;
+ linkType = LinkType.CHK;
+ }
+ if ((nextSsk > -1) && (nextSsk < next)) {
+ next = nextSsk;
+ linkType = LinkType.SSK;
+ }
+ if ((nextUsk > -1) && (nextUsk < next)) {
+ next = nextUsk;
+ linkType = LinkType.USK;
+ }
+ if ((nextHttp > -1) && (nextHttp < next)) {
+ next = nextHttp;
+ linkType = LinkType.HTTP;
+ }
+ if ((nextHttps > -1) && (nextHttps < next)) {
+ next = nextHttps;
+ linkType = LinkType.HTTPS;
+ }
+ if ((nextSone > -1) && (nextSone < next)) {
+ next = nextSone;
+ linkType = LinkType.SONE;
+ }
+ if ((nextPost > -1) && (nextPost < next)) {
+ next = nextPost;
+ linkType = LinkType.POST;
+ }
+ if (linkType == LinkType.SONE) {
+ if (next > 0) {
+ parts.add(new PlainTextPart(line.substring(0, next)));
+ }
+ if (line.length() >= (next + 7 + 43)) {
+ String soneId = line.substring(next + 7, next + 50);
+ Sone sone = core.getSone(soneId, false);
+ if (sone != null) {
+ parts.add(new SonePart(sone));
+ } else {
+ parts.add(new PlainTextPart(line.substring(next, next + 50)));
+ }
+ line = line.substring(next + 50);
+ } else {
+ parts.add(new PlainTextPart(line.substring(next)));
+ line = "";
+ }
+ continue;
+ }
+ if (linkType == LinkType.POST) {
+ if (next > 0) {
+ parts.add(new PlainTextPart(line.substring(0, next)));
+ }
+ if (line.length() >= (next + 7 + 36)) {
+ String postId = line.substring(next + 7, next + 43);
+ Post post = core.getPost(postId, false);
+ if ((post != null) && (post.getSone() != null)) {
+ String postText = post.getText();
+ postText = postText.substring(0, Math.min(postText.length(), 20)) + "…";
+ parts.add(new PostPart(post));
+ } else {
+ parts.add(new PlainTextPart(line.substring(next, next + 43)));
+ }
+ line = line.substring(next + 43);
+ } else {
+ parts.add(new PlainTextPart(line.substring(next)));
+ line = "";
+ }
+ continue;
+ }
+ if ((next >= 8) && (line.substring(next - 8, next).equals("freenet:"))) {
+ next -= 8;
+ line = line.substring(0, next) + line.substring(next + 8);
+ }
+ Matcher matcher = whitespacePattern.matcher(line);
+ int nextSpace = matcher.find(next) ? matcher.start() : line.length();
+ if (nextSpace > (next + 4)) {
+ if (!lastLineEmpty && lineComplete) {
+ parts.add(new PlainTextPart("\n" + line.substring(0, next)));
+ } else {
+ parts.add(new PlainTextPart(line.substring(0, next)));
+ }
+ String link = line.substring(next, nextSpace);
+ String name = link;
+ logger.log(Level.FINER, "Found link: %s", link);
+ logger.log(Level.FINEST, "Next: %d, CHK: %d, SSK: %d, USK: %d", new Object[] { next, nextChk, nextSsk, nextUsk });
+
+ 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.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);
+ } else {
+ if (!lastLineEmpty && lineComplete) {
+ parts.add(new PlainTextPart("\n" + line.substring(0, next + 4)));
+ } else {
+ parts.add(new PlainTextPart(line.substring(0, next + 4)));
+ }
+ line = line.substring(next + 4);
+ }
+ lineComplete = false;
+ }
+ lastLineEmpty = false;
+ }
+ for (int partIndex = parts.size() - 1; partIndex >= 0; --partIndex) {
+ Part part = parts.getPart(partIndex);
+ if ((part instanceof PlainTextPart) && !"\n".equals(((PlainTextPart) part).getText())) {
+ break;
+ }
+ parts.removePart(partIndex);
+ }
+ return parts;
+ }
+
+}
projects / Sone.git / blobdiff