From f57601b2426656a014d099ec66828e9f40732492 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 14 Feb 2016 11:47:36 +0000
Subject: Convert hyperlink with internal anchor to HTML

---
 .../org/zwobble/mammoth/DocumentConverter.java     | 26 +++++++++++++++++-----
 src/main/java/org/zwobble/mammoth/Mammoth.java     |  4 +++-
 2 files changed, 24 insertions(+), 6 deletions(-)

(limited to 'src/main/java/org')

diff --git a/src/main/java/org/zwobble/mammoth/DocumentConverter.java b/src/main/java/org/zwobble/mammoth/DocumentConverter.java
index e8d9059..49bc904 100644
--- a/src/main/java/org/zwobble/mammoth/DocumentConverter.java
+++ b/src/main/java/org/zwobble/mammoth/DocumentConverter.java
@@ -12,17 +12,23 @@ import static org.zwobble.mammoth.util.MammothLists.list;
 import static org.zwobble.mammoth.util.MammothMaps.map;
 
 public class DocumentConverter {
-    public static List<HtmlNode> convertToHtml(Document document) {
+    private final String idPrefix;
+
+    public DocumentConverter(String idPrefix) {
+        this.idPrefix = idPrefix;
+    }
+
+    public List<HtmlNode> convertToHtml(Document document) {
         return convertChildrenToHtml(document);
     }
 
-    private static List<HtmlNode> convertChildrenToHtml(HasChildren element) {
+    private List<HtmlNode> convertChildrenToHtml(HasChildren element) {
         return eagerFlatMap(
             element.getChildren(),
-            DocumentConverter::convertToHtml);
+            this::convertToHtml);
     }
 
-    public static List<HtmlNode> convertToHtml(DocumentElement element) {
+    public List<HtmlNode> convertToHtml(DocumentElement element) {
         return element.accept(new DocumentElementVisitor<List<HtmlNode>>() {
             @Override
             public List<HtmlNode> visit(Paragraph paragraph) {
@@ -91,10 +97,20 @@ public class DocumentConverter {
 
             @Override
             public List<HtmlNode> visit(Hyperlink hyperlink) {
-                Map<String, String> attributes = map("href", hyperlink.getHref().get());
+                Map<String, String> attributes = map("href", generateHref(hyperlink));
                 return list(Html.element("a", attributes, convertChildrenToHtml(hyperlink)));
             }
 
+            private String generateHref(Hyperlink hyperlink) {
+                if (hyperlink.getHref().isPresent()) {
+                    return hyperlink.getHref().get();
+                } else if (hyperlink.getAnchor().isPresent()) {
+                    return "#" + idPrefix + "-" + hyperlink.getAnchor().get();
+                } else {
+                    return "";
+                }
+            }
+
             @Override
             public List<HtmlNode> visit(Bookmark bookmark) {
                 throw new UnsupportedOperationException();
diff --git a/src/main/java/org/zwobble/mammoth/Mammoth.java b/src/main/java/org/zwobble/mammoth/Mammoth.java
index 9da4c14..26db504 100644
--- a/src/main/java/org/zwobble/mammoth/Mammoth.java
+++ b/src/main/java/org/zwobble/mammoth/Mammoth.java
@@ -32,8 +32,10 @@ public class Mammoth {
                 contentTypes,
                 zipFile,
                 fileReader));
+            // TODO: prefix
+            String idPrefix = "document";
             return reader.readElement(documentXml)
-                .map(DocumentConverter::convertToHtml)
+                .map(nodes -> new DocumentConverter(idPrefix).convertToHtml(nodes))
                 .map(Html::write);
         } catch (IOException e) {
             throw new UnsupportedOperationException("Should return a result of failure");   
-- 
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