From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Fri, 13 Oct 2017 06:00:21 +0000 (+0200)
Subject: Replace parser with Kotlin version
X-Git-Tag: 0.9.8^2~31
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=a45d1b5d50019622c4c6fce6ffa46b4e640b8e7f;p=Sone.git

Replace parser with Kotlin version
---

diff --git a/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java b/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java
deleted file mode 100644
index 39d26db..0000000
--- a/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * 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
- * 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 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 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.
- *
- * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
- */
-public class SoneTextParser implements Parser<SoneTextParserContext> {
-
-	/** The logger. */
-	private static final Logger logger = getLogger(SoneTextParser.class.getName());
-
-	/** 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.
-	 *
-	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
-	 */
-	private enum LinkType {
-
-		KSK("KSK@", true),
-		CHK("CHK@", true),
-		SSK("SSK@", true),
-		USK("USK@", true),
-		HTTP("http://", false),
-		HTTPS("https://", false),
-		SONE("sone://", 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;
-
-		LinkType(String scheme, boolean freenetLink) {
-			this.scheme = scheme;
-			this.freenetLink = freenetLink;
-		}
-
-		/**
-		 * Returns the scheme of this link type.
-		 *
-		 * @return The scheme of this link type
-		 */
-		public String getScheme() {
-			return scheme;
-		}
-
-		public boolean isFreenetLink() {
-			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. */
-	private final SoneProvider soneProvider;
-
-	/** The post provider. */
-	private final PostProvider postProvider;
-
-	/**
-	 * Creates a new freenet link parser.
-	 *
-	 * @param soneProvider
-	 *            The Sone provider
-	 * @param postProvider
-	 *            The post provider
-	 */
-	public SoneTextParser(SoneProvider soneProvider, PostProvider postProvider) {
-		this.soneProvider = soneProvider;
-		this.postProvider = postProvider;
-	}
-
-	//
-	// PART METHODS
-	//
-
-	/**
-	 * {@inheritDoc}
-	 */
-	@Nonnull
-	@Override
-	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;
-			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;
-				/*
-				 * lineComplete tracks whether the block you are parsing is the
-				 * first block of the line. this is important because sometimes
-				 * you have to add an additional line break.
-				 */
-				boolean lineComplete = true;
-				while (line.length() > 0) {
-					Optional<NextLink> nextLink = findNextLink(line);
-					if (!nextLink.isPresent()) {
-						if (lineComplete && !lastLineEmpty) {
-							parts.add(new PlainTextPart("\n" + line));
-						} else {
-							parts.add(new PlainTextPart(line));
-						}
-						break;
-					}
-					LinkType linkType = nextLink.get().getLinkType();
-					int next = nextLink.get().getPosition();
-
-					/* cut off “freenet:” from before keys. */
-					if (linkType.isFreenetLink() && (next >= 8) && (line.substring(next - 8, next).equals("freenet:"))) {
-						next -= 8;
-						line = line.substring(0, next) + line.substring(next + 8);
-					}
-
-					/* if there is text before the next item, write it out. */
-					if (lineComplete && !lastLineEmpty) {
-						parts.add(new PlainTextPart("\n"));
-					}
-					if (next > 0) {
-						parts.add(new PlainTextPart(line.substring(0, next)));
-						line = line.substring(next);
-					}
-					lineComplete = false;
-
-					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! */
-					if (link.equals(linkType.getScheme())) {
-						parts.add(new PlainTextPart(linkType.getScheme()));
-						line = line.substring(linkType.getScheme().length());
-						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);
-					}
-
-					line = nextLink.get().getRemainder();
-				}
-				lastLineEmpty = false;
-			}
-		} 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.get(partIndex);
-			if (!(part instanceof PlainTextPart) || !"\n".equals(part.getText())) {
-				break;
-			}
-			parts.remove(partIndex);
-		}
-		return parts;
-	}
-
-	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);
-	}
-
-	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));
-		}
-	}
-
-	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));
-		}
-	}
-
-	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()));
-			}
-			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 == '?');
-	}
-
-}
diff --git a/src/main/kotlin/net/pterodactylus/sone/text/SoneTextParser.kt b/src/main/kotlin/net/pterodactylus/sone/text/SoneTextParser.kt
new file mode 100644
index 0000000..68a38ef
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/text/SoneTextParser.kt
@@ -0,0 +1,197 @@
+package net.pterodactylus.sone.text
+
+import freenet.keys.FreenetURI
+import freenet.support.Base64
+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.sone.text.LinkType.CHK
+import net.pterodactylus.sone.text.LinkType.FREEMAIL
+import net.pterodactylus.sone.text.LinkType.HTTP
+import net.pterodactylus.sone.text.LinkType.HTTPS
+import net.pterodactylus.sone.text.LinkType.KSK
+import net.pterodactylus.sone.text.LinkType.POST
+import net.pterodactylus.sone.text.LinkType.SONE
+import net.pterodactylus.sone.text.LinkType.SSK
+import net.pterodactylus.sone.text.LinkType.USK
+import net.pterodactylus.sone.utils.let
+import org.bitpedia.util.Base32
+import java.net.MalformedURLException
+
+/**
+ * [Parser] implementation that can recognize Freenet URIs.
+ */
+class SoneTextParser(private val soneProvider: SoneProvider?, private val postProvider: PostProvider?) {
+
+	fun parse(source: String, context: SoneTextParserContext?) =
+			source.split("\n")
+					.dropWhile { it.trim() == "" }
+					.dropLastWhile { it.trim() == "" }
+					.mergeMultipleEmptyLines()
+					.flatMap { splitLineIntoParts(it, context) }
+					.removeEmptyPlainTextParts()
+					.mergeAdjacentPlainTextParts()
+
+	private fun splitLineIntoParts(line: String, context: SoneTextParserContext?) =
+			generateSequence(PlainTextPart("") as Part to line) { remainder ->
+				if (remainder.second == "")
+					null
+				else
+					LinkType.values()
+							.mapNotNull { it.findNext(remainder.second) }
+							.minBy { it.position }
+							.let {
+								when {
+									it == null -> PlainTextPart(remainder.second) to ""
+									it.position == 0 -> it.toPart(context) to it.remainder
+									else -> PlainTextPart(remainder.second.substring(0, it.position)) to (it.link + it.remainder)
+								}
+							}
+			}.map { it.first }.toList()
+
+	private fun NextLink.toPart(context: SoneTextParserContext?) = when (linkType) {
+		KSK, CHK -> try {
+			FreenetURI(link).let { freenetUri ->
+				FreenetLinkPart(
+						link,
+						if (freenetUri.isKSK) {
+							freenetUri.guessableKey
+						} else {
+							freenetUri.metaString ?: freenetUri.docName ?: link.substring(0, 9)
+						},
+						link.split('?').first()
+				)
+			}
+		} catch (e: MalformedURLException) {
+			PlainTextPart(link)
+		}
+		SSK, USK ->
+			try {
+				 FreenetLinkPart(link, FreenetURI(link).docName, trusted = context?.routingKey?.contentEquals(FreenetURI(link).routingKey) == true)
+			} catch (e: MalformedURLException) {
+				PlainTextPart(link)
+			}
+		SONE -> link.substring(7).let { SonePart(soneProvider?.getSone(it)?.orNull() ?: IdOnlySone(it)) }
+		POST -> postProvider?.getPost(link.substring(7))?.let { PostPart(it) } ?: PlainTextPart(link)
+		FREEMAIL -> link.indexOf('@').let { atSign ->
+			link.substring(atSign + 1, link.length - 9).let { freemailId ->
+				FreemailPart(link.substring(0, atSign), freemailId, freemailId.decodedId)
+			}
+		}
+		HTTP, HTTPS -> LinkPart(link, link
+				.withoutProtocol
+				.withoutWwwPrefix
+				.withoutUrlParameters
+				.withoutMiddlePathComponents
+				.withoutTrailingSlash)
+	}
+
+}
+
+private fun List<String>.mergeMultipleEmptyLines() = fold(emptyList<String>()) { previous, current ->
+	if (previous.isEmpty()) {
+		previous + current
+	} else {
+		if ((previous.last() == "\n") && (current == "")) {
+			previous
+		} else {
+			previous + ("\n" + current)
+		}
+	}
+}
+
+private fun List<Part>.mergeAdjacentPlainTextParts() = fold(emptyList<Part>()) { parts, part ->
+	if ((parts.lastOrNull() is PlainTextPart) && (part is PlainTextPart)) {
+		parts.dropLast(1) + PlainTextPart(parts.last().text + part.text)
+	} else {
+		parts + part
+	}
+}
+
+private fun List<Part>.removeEmptyPlainTextParts() = filterNot { it == PlainTextPart("") }
+
+private val String.decodedId: String get() = Base64.encode(Base32.decode(this))
+private val String.withoutProtocol get() = substring(indexOf("//") + 2)
+private val String.withoutUrlParameters get() = split('?').first()
+
+private val String.withoutWwwPrefix
+	get() = split("/")
+			.replaceFirst { it.split(".").dropWhile { it == "www" }.joinToString(".") }
+			.joinToString("/")
+
+private fun <T> List<T>.replaceFirst(replacement: (T) -> T) = mapIndexed { index, element ->
+	if (index == 0) replacement(element) else element
+}
+
+private val String.withoutMiddlePathComponents
+	get() = split("/").let {
+		if (it.size > 2) {
+			"${it.first()}/…/${it.last()}"
+		} else {
+			it.joinToString("/")
+		}
+	}
+private val String.withoutTrailingSlash get() = if (endsWith("/")) substring(0, length - 1) else this
+private val SoneTextParserContext.routingKey: ByteArray? get() = postingSone?.routingKey
+private val Sone.routingKey: ByteArray get() = Base64.decode(id)
+
+private enum class LinkType(private val scheme: String, private val freenetLink: Boolean) {
+
+	KSK("KSK@", true),
+	CHK("CHK@", true),
+	SSK("SSK@", true),
+	USK("USK@", true),
+	HTTP("http://", false),
+	HTTPS("https://", false),
+	SONE("sone://", false) {
+		override fun validateLinkLength(length: Int) = length.takeIf { it == 50 }
+	},
+	POST("post://", false),
+	FREEMAIL("", true) {
+		override fun findNext(line: String): NextLink? {
+			val nextFreemailSuffix = line.indexOf(".freemail").takeIf { it >= 54 } ?: return null
+			if (line[nextFreemailSuffix - 53] != '@') return null
+			if (!line.substring(nextFreemailSuffix - 52, nextFreemailSuffix).matches(Regex("^[a-z2-7]*\$"))) return null
+			val firstCharacterIndex = generateSequence(nextFreemailSuffix - 53) {
+				it.minus(1).takeIf { (it >= 0) && line[it].validLocalPart }
+			}.lastOrNull() ?: return null
+			return NextLink(firstCharacterIndex, this, line.substring(firstCharacterIndex, nextFreemailSuffix + 9), line.substring(nextFreemailSuffix + 9))
+		}
+
+		private val Char.validLocalPart get() = (this in ('A'..'Z')) || (this in ('a'..'z')) || (this in ('0'..'9')) || (this == '-') || (this == '_') || (this == '.')
+	};
+
+	open fun findNext(line: String): NextLink? {
+		val nextLinkPosition = line.indexOf(scheme).takeIf { it != -1 } ?: return null
+		val endOfLink = line.substring(nextLinkPosition).findEndOfLink().validate() ?: return null
+		val link = line.substring(nextLinkPosition, nextLinkPosition + endOfLink)
+		val realNextLinkPosition = if (freenetLink && line.substring(0, nextLinkPosition).endsWith("freenet:")) nextLinkPosition - 8 else nextLinkPosition
+		return NextLink(realNextLinkPosition, this, link, line.substring(nextLinkPosition + endOfLink))
+	}
+
+	private fun String.findEndOfLink() =
+			substring(0, whitespace.find(this)?.range?.start ?: length)
+					.dropLastWhile(::isPunctuation)
+					.upToFirstUnmatchedParen()
+
+	private fun Int.validate() = validateLinkLength(this)
+	protected open fun validateLinkLength(length: Int) = length.takeIf { it > scheme.length }
+
+	private fun String.upToFirstUnmatchedParen() =
+			foldIndexed(Pair<Int, Int?>(0, null)) { index, (openParens, firstUnmatchedParen), currentChar ->
+				when (currentChar) {
+					'(' -> (openParens + 1) to firstUnmatchedParen
+					')' -> ((openParens - 1) to (if (openParens == 0) (firstUnmatchedParen ?: index) else firstUnmatchedParen))
+					else -> openParens to firstUnmatchedParen
+				}
+			}.second ?: length
+
+}
+
+private val punctuationChars = listOf('.', ',', '?', '!')
+private fun isPunctuation(char: Char) = char in punctuationChars
+
+private val whitespace = Regex("[\\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 data class NextLink(val position: Int, val linkType: LinkType, val link: String, val remainder: String)