From 505c771415cd5c6f71c24e6c2b837d6e2f0c3a78 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Mon, 15 Aug 2016 20:41:39 +0200
Subject: [PATCH] Change parser to better recognize the end of links

---
 .../pterodactylus/sone/text/SoneTextParser.java    | 30 +++++++++++++++++++---
 .../sone/text/SoneTextParserTest.java              | 15 +++++++++++
 2 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java b/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java
index fb4e7cd..b675c12 100644
--- a/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java
+++ b/src/main/java/net/pterodactylus/sone/text/SoneTextParser.java
@@ -175,9 +175,8 @@ public class SoneTextParser implements Parser<SoneTextParserContext> {
 					}
 					lineComplete = false;
 
-					Matcher matcher = whitespacePattern.matcher(line);
-					int nextSpace = matcher.find(0) ? matcher.start() : line.length();
-					String link = line.substring(0, nextSpace);
+					int endOfLink = findEndOfLink(line);
+					String link = line.substring(0, endOfLink);
 					String name = link;
 					logger.log(Level.FINER, String.format("Found link: %s", link));
 
@@ -271,7 +270,7 @@ public class SoneTextParser implements Parser<SoneTextParserContext> {
 						}
 						parts.add(new LinkPart(link, name));
 					}
-					line = line.substring(nextSpace);
+					line = line.substring(endOfLink);
 				}
 				lastLineEmpty = false;
 			}
@@ -291,6 +290,29 @@ public class SoneTextParser implements Parser<SoneTextParserContext> {
 		return parts;
 	}
 
+	private int findEndOfLink(String line) {
+		Matcher matcher = whitespacePattern.matcher(line);
+		if (!matcher.find(0)) {
+			return line.length();
+		}
+		int nextWhitespace = matcher.start();
+		int openParens = 0;
+		for (int i = 0; i < nextWhitespace; i++) {
+			switch (line.charAt(i)) {
+				case '(':
+					openParens++;
+					break;
+				case ')':
+					openParens--;
+					if (openParens < 0) {
+						return i;
+					}
+				default:
+			}
+		}
+		return nextWhitespace;
+	}
+
 	private static class NextLink {
 
 		private final int position;
diff --git a/src/test/java/net/pterodactylus/sone/text/SoneTextParserTest.java b/src/test/java/net/pterodactylus/sone/text/SoneTextParserTest.java
index 200a773..8d83c95 100644
--- a/src/test/java/net/pterodactylus/sone/text/SoneTextParserTest.java
+++ b/src/test/java/net/pterodactylus/sone/text/SoneTextParserTest.java
@@ -108,6 +108,21 @@ public class SoneTextParserTest {
 		assertThat("Part Text", "Some text. Empty link: http:// – nice!", is(convertText(parts, PlainTextPart.class)));
 	}
 
+	@Test
+	public void httpLinkWithoutParensEndsAtNextClosingParen() {
+		SoneTextParser soneTextParser = new SoneTextParser(null, null);
+		Iterable<Part> parts = soneTextParser.parse("Some text (and a link: http://example.sone/abc) – nice!", null);
+		assertThat("Parts", parts, notNullValue());
+		assertThat("Part Text", "Some text (and a link: [http://example.sone/abc|example.sone/abc|example.sone/abc]) – nice!", is(convertText(parts, PlainTextPart.class, LinkPart.class)));
+	}
+
+	@Test
+	public void httpLinkWithOpenedAndClosedParensEndsAtNextClosingParen() {
+		SoneTextParser soneTextParser = new SoneTextParser(null, null);
+		Iterable<Part> parts = soneTextParser.parse("Some text (and a link: http://example.sone/abc_(def)) – nice!", null);
+		assertThat("Parts", parts, notNullValue());
+		assertThat("Part Text", "Some text (and a link: [http://example.sone/abc_(def)|example.sone/abc_(def)|example.sone/abc_(def)]) – nice!", is(convertText(parts, PlainTextPart.class, LinkPart.class)));
+	}
 
 	/**
 	 * Converts all given {@link Part}s into a string, validating that the
-- 
2.7.4