Added a basic implementation of hanging protocols with one hardcoded mammogram protocol.

Packages/hangingprotocols/server/instanceDataToJsObject.js

@@ -0,0 +1,73 @@
+var valueRepresentationTypes = {
+    number: [
+        'SH',
+        'LO'
+    ]
+};
+
+/**
+ * converts an WADO instance to a javascript object with the help of a data dictionary
+ *
+ * @param instance
+ * @param options
+ */
+instanceDataToJsObject = function (instance, dictionary) {
+    if (!instance) {
+        throw 'instanceDataToJsObject: missing required parameter dataSet';
+    }
+
+    var result = {};
+
+    // The comma is always inserted after the first four digits
+    var position = 4;
+
+    Object.keys(instance).forEach(function(tag) {
+        var item = instance[tag];
+
+        // Reformat the tag from 00020010 to "(0002,0010)" to suit the dictionary
+        var tagFormatted = '(' + tag.substr(0, position) + ',' + tag.substr(position) + ')';
+
+        // Retrieve the tag dictionary entry
+        var tagDictionaryEntry = dictionary[tagFormatted];
+        console.log(tagDictionaryEntry);
+
+        // If there is no tag dictionary entry, or no name
+        // for this tag, just use the original tag instead
+        var tagName;
+        if (!tagDictionaryEntry || !tagDictionaryEntry.name) {
+            tagName = tag;
+        } else {
+            tagName = tagDictionaryEntry.name;
+        }
+
+        if (item.Value && item.Value.length > 1) {
+            // handle sequences
+            var sequenceItems = [];
+            item.Value.forEach(function(instance) {
+                sequenceItems.push(instanceDataToJsObject(instance, dictionary));
+            });
+            result[tagName] = sequenceItems;
+
+        } else if (!item.Value || !item.Value.length) {
+            // Handle empty arrays
+            result[tagName] = undefined;
+
+        } else {
+            // Handle single valued cases
+            if (item.vr === 'PN') {
+                // Patient Name
+                result[tagName] = DICOMWeb.getName(item);
+
+            } else if (valueRepresentationTypes.number.indexOf(item.vr) > 0) {
+                // Number type
+                result[tagName] = DICOMWeb.getNumber(item);
+
+            } else {
+                // Everything else
+                result[tagName] = DICOMWeb.getString(item);
+            }
+        }
+    });
+    console.log(result);
+    return result;
+};