Split xmlreader into nodes and reader modules

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/xml/nodes.js b/lib/xml/nodes.js
new file mode 100644
index 0000000..ed273cf
--- /dev/null
+++ b/lib/xml/nodes.js
@@ -0,0 +1,60 @@
+var _ = require("underscore");
+
+
+exports.Element = Element;
+
+
+var emptyElement = {
+    first: function() {
+        return null;
+    },
+    firstOrEmpty: function() {
+        return emptyElement;
+    },
+    attributes: {}
+};
+
+function Element(name, attributes, children) {
+    this.type = "element";
+    this.name = name;
+    this.attributes = attributes || {};
+    this.children = children || [];
+}
+
+Element.prototype.first = function(name) {
+    return _.find(this.children, function(child) {
+        return child.name == name;
+    });
+};
+
+Element.prototype.firstOrEmpty = function(name) {
+    return this.first(name) || emptyElement;
+};
+
+Element.prototype.getElementsByTagName = function(name) {
+    var elements = _.filter(this.children, function(child) {
+        return child.name == name;
+    });
+    return toElementList(elements);
+};
+
+Element.prototype.text = function() {
+    if (this.children.length === 0) {
+        return "";
+    } else if (this.children.length !== 1 || this.children[0].type !== "text") {
+        throw new Error("Not implemented");
+    }
+    return this.children[0].value;
+};
+
+var elementListPrototype = {
+    getElementsByTagName: function(name) {
+        return toElementList(_.flatten(this.map(function(element) {
+            return element.getElementsByTagName(name);
+        }, true)));
+    }
+};
+
+function toElementList(array) {
+    return _.extend(array, elementListPrototype);
+}