task 7: restructure PlainTextParser to single-chapter model, update tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

VorleserKit/Sources/BookParser/PlainTextParser.swift

@@ -1,16 +1,21 @@
 import Foundation
 
+#if canImport(UIKit)
+import UIKit
+#elseif canImport(AppKit)
+import AppKit
+#endif
+
 public struct PlainTextParser {
 	public static func parse(text: String, title: String, author: String? = nil) -> Book {
-		let paragraphs = text.components(separatedBy: "\n\n")
-			.map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
-			.filter { !$0.isEmpty }
-
-		let chapters = paragraphs.enumerated().map { index, text in
-			Chapter(index: index, title: "Section \(index + 1)", text: text)
+		let trimmed = text.trimmingCharacters(in: .whitespacesAndNewlines)
+		guard !trimmed.isEmpty else {
+			return Book(title: title, author: author, chapters: [])
 		}
 
-		return Book(title: title, author: author, chapters: chapters)
+		let attributedText = AttributedStringBuilder.buildPlain(text: trimmed)
+		let chapter = Chapter(index: 0, title: title, text: trimmed, attributedText: attributedText)
+		return Book(title: title, author: author, chapters: [chapter])
 	}
 
 	public static func parse(url: URL) throws -> Book {

VorleserKit/Tests/BookParserTests/BookTests.swift

@@ -17,7 +17,7 @@ struct BookParserFacadeTests {
 		defer { try? FileManager.default.removeItem(at: tmpFile) }
 
 		let book = try BookParser.parse(url: tmpFile)
-		#expect(book.chapters.count == 2)
+		#expect(book.chapters.count == 1)
 	}
 }
 

VorleserKit/Tests/BookParserTests/PlainTextParserTests.swift

@@ -4,14 +4,6 @@ import Foundation
 
 @Suite("PlainTextParser")
 struct PlainTextParserTests {
-	@Test func parsesMultipleChapters() throws {
-		let text = "First chapter content.\n\nSecond chapter content.\n\nThird chapter."
-		let book = PlainTextParser.parse(text: text, title: "Test Book")
-		#expect(book.chapters.count == 3)
-		#expect(book.chapters[0].text == "First chapter content.")
-		#expect(book.chapters[1].text == "Second chapter content.")
-	}
-
 	@Test func parsesSingleParagraphAsOneChapter() {
 		let text = "Just a single paragraph with no double newlines."
 		let book = PlainTextParser.parse(text: text, title: "Test")
@@ -19,6 +11,13 @@ struct PlainTextParserTests {
 		#expect(book.chapters[0].text == text)
 	}
 
+	@Test func multiParagraphTextBecomesOneChapter() {
+		let text = "First paragraph.\n\nSecond paragraph.\n\nThird paragraph."
+		let book = PlainTextParser.parse(text: text, title: "Test Book")
+		#expect(book.chapters.count == 1)
+		#expect(book.chapters[0].text == text)
+	}
+
 	@Test func setsTitle() {
 		let book = PlainTextParser.parse(text: "Hello", title: "My Book")
 		#expect(book.title == "My Book")
@@ -30,7 +29,13 @@ struct PlainTextParserTests {
 		defer { try? FileManager.default.removeItem(at: tmpFile) }
 
 		let book = try PlainTextParser.parse(url: tmpFile)
-		#expect(book.chapters.count == 2)
+		#expect(book.chapters.count == 1)
 		#expect(book.title == "test")
 	}
+
+	@Test func attributedTextStringMatchesPlainText() {
+		let text = "Hello world.\n\nSecond paragraph."
+		let book = PlainTextParser.parse(text: text, title: "Test")
+		#expect(book.chapters[0].attributedText.string == book.chapters[0].text)
+	}
 }