From 4f7a626cdda9beef3ac058427594b7295045a7e2 Mon Sep 17 00:00:00 2001
From: Linnea Gräf <nea@nea.moe>
Date: Sun, 24 Mar 2024 16:56:28 +0100
Subject: Add link parser

---
 src/main/kotlin/moe/nea/blog/md/BlogPost.kt         | 11 -----------
 src/main/kotlin/moe/nea/blog/md/LinkParser.kt       | 21 +++++++++++++++++++++
 src/main/kotlin/moe/nea/blog/md/MarkdownParser.kt   |  1 +
 src/test/kotlin/moe/nea/blog/md/test/LinkTest.kt    | 16 ++++++++++++++++
 src/test/kotlin/moe/nea/blog/md/test/TestItalics.kt |  9 +++++++++
 5 files changed, 47 insertions(+), 11 deletions(-)
 delete mode 100644 src/main/kotlin/moe/nea/blog/md/BlogPost.kt
 create mode 100644 src/main/kotlin/moe/nea/blog/md/LinkParser.kt
 create mode 100644 src/test/kotlin/moe/nea/blog/md/test/LinkTest.kt

diff --git a/src/main/kotlin/moe/nea/blog/md/BlogPost.kt b/src/main/kotlin/moe/nea/blog/md/BlogPost.kt
deleted file mode 100644
index 8343b85..0000000
--- a/src/main/kotlin/moe/nea/blog/md/BlogPost.kt
+++ /dev/null
@@ -1,11 +0,0 @@
-package moe.nea.blog.md
-
-import java.io.File
-
-
-fun main() {
-    val parser = MarkdownParser(File("data/test.md").readText())
-    parser.addDefaultParsers()
-    val doc = parser.readDocument()
-    doc.debugFormat(System.out)
-}
diff --git a/src/main/kotlin/moe/nea/blog/md/LinkParser.kt b/src/main/kotlin/moe/nea/blog/md/LinkParser.kt
new file mode 100644
index 0000000..c247e6f
--- /dev/null
+++ b/src/main/kotlin/moe/nea/blog/md/LinkParser.kt
@@ -0,0 +1,21 @@
+package moe.nea.blog.md
+
+object LinkParser : InlineParser {
+    override fun detect(lookback: MarkdownFormat, rest: String): Boolean {
+        return rest.startsWith("[")
+    }
+
+    override val specialSyntax: Set<Char>
+        get() = "()[]".toSet()
+
+    override fun parse(parser: MarkdownParser, text: String): Pair<MarkdownFormat, String> {
+        val (label, rest) = parser.parseInlineTextUntil(
+            text.substring(1),
+            Begin()
+        ) { lookback, remaining -> remaining.startsWith("]") } // TODO: better begin
+        require(rest.startsWith("](")) { TODO("unlabeled links") }
+        val urlEndIndex = rest.indexOf(')')
+        val url = rest.substring(2, urlEndIndex)
+        return Pair(Link(parser.collapseInlineFormat(label, false), url.trim()), rest.substring(urlEndIndex + 1))
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/moe/nea/blog/md/MarkdownParser.kt b/src/main/kotlin/moe/nea/blog/md/MarkdownParser.kt
index 40c4c30..ad818dd 100644
--- a/src/main/kotlin/moe/nea/blog/md/MarkdownParser.kt
+++ b/src/main/kotlin/moe/nea/blog/md/MarkdownParser.kt
@@ -140,6 +140,7 @@ class MarkdownParser(source: String) {
         blockParsers.add(CodeBlockParser)
         blockParsers.add(HeaderParser)
         inlineParsers.add(ItalicsParser)
+        inlineParsers.add(LinkParser)
     }
 }
 
diff --git a/src/test/kotlin/moe/nea/blog/md/test/LinkTest.kt b/src/test/kotlin/moe/nea/blog/md/test/LinkTest.kt
new file mode 100644
index 0000000..d476715
--- /dev/null
+++ b/src/test/kotlin/moe/nea/blog/md/test/LinkTest.kt
@@ -0,0 +1,16 @@
+package moe.nea.blog.md.test
+
+import kotlin.test.Test
+
+class LinkTest : MarkdownTest() {
+    @Test
+    fun testPaddedLink() {
+        assertInlineFormat("<link target=https://nea.moe>meee</link>", "[meee]( https://nea.moe )")
+    }
+
+    @Test
+    fun testFormattingInLink() {
+        assertInlineFormat("<link target=https://nea.moe><i>meee</i></link>", "[*meee*]( https://nea.moe )")
+    }
+
+}
\ No newline at end of file
diff --git a/src/test/kotlin/moe/nea/blog/md/test/TestItalics.kt b/src/test/kotlin/moe/nea/blog/md/test/TestItalics.kt
index 673dafb..f4c1669 100644
--- a/src/test/kotlin/moe/nea/blog/md/test/TestItalics.kt
+++ b/src/test/kotlin/moe/nea/blog/md/test/TestItalics.kt
@@ -14,6 +14,15 @@ class TestItalics : MarkdownTest() {
         assertInlineFormat("<i><b>both</b> just italics</i>", "***both** just italics*")
     }
 
+
+    @Test
+    fun otherMarkdownInItalics() {
+        assertInlineFormat(
+            "<i><link target=https://nea.moe><b>test</b></link></i>",
+            "*[**test**](https://nea.moe)*"
+        )
+    }
+
     @Test
     fun testDoubleStartRestartingItalics() {
         assertInlineFormat(
-- 
cgit