1 files changed, 50 insertions, 0 deletions
diff --git a/lib/docx/content-types-reader.js b/lib/docx/content-types-reader.js
new file mode 100644
index 0000000..0a74eb9
--- /dev/null
+++ b/lib/docx/content-types-reader.js
@@ -0,0 +1,50 @@
+var readXmlFromZipFile = require("./office-xml-reader").readXmlFromZipFile;
+
+exports.readContentTypesFromZipFile = readContentTypesFromZipFile;
+exports.readContentTypesFromXml = readContentTypesFromXml;
+
+
+function readContentTypesFromZipFile(file) {
+    return readXmlFromZipFile(file, "[Content_Types].xml")
+        .then(function(xml) {
+            return xml ? readContentTypesFromXml(xml) : defaultContentTypes;
+        });
+}
+
+function readContentTypesFromXml(xml) {
+    var extensionDefaults = {};
+    var overrides = {};
+    
+    xml.root.children.forEach(function(child) {
+        if (child.name === "content-types:Default") {
+            extensionDefaults[child.attributes.Extension] = child.attributes.ContentType;
+        }
+        if (child.name === "content-types:Override") {
+            var name = child.attributes.PartName;
+            if (name.charAt(0) === "/") {
+                name = name.substring(1);
+            }
+            overrides[name] = child.attributes.ContentType;
+        }
+    });
+    
+    return {
+        findContentType: function(path) {
+            var overrideContentType = overrides[path];
+            if (overrideContentType) {
+                return overrideContentType;
+            } else {
+                var pathParts = path.split(".");
+                var extension = pathParts[pathParts.length - 1];
+                return extensionDefaults[extension];
+            }
+        }
+    }
+}
+
+
+var defaultContentTypes = {
+    findContentType: function(path) {
+        return null;
+    }
+};