Work on refactoring measurements out of Lesion Tracker package

- Removed AssociatedStudies Collection
- Measurement API is generated from configuration files
- Data exchange methods are defined in configuration

Packages/ohif-lesiontracker/lib/syncMeasurementAndToolData.js

@@ -0,0 +1,60 @@
+function toolDataExists(toolState, imageId, toolType) {
+    const currentToolState = toolState[imageId][toolType];
+    return (currentToolState && currentToolState.data && currentToolState.data.length);
+}
+
+syncMeasurementAndToolData = function(measurement) {
+    log.info('syncMeasurementAndToolData');
+
+    const toolState = cornerstoneTools.globalImageIdSpecificToolStateManager.toolState;
+    const imageId = measurement.imageId;
+    const toolType = measurement.toolType;
+
+    // If no tool state exists for this imageId, create an empty object to store it
+    if (!toolState[imageId]) {
+        toolState[imageId] = {};
+    }
+
+    // Check if we already have toolData for this imageId and toolType
+    if (toolDataExists(toolState, imageId, toolType)) {
+        // If we have toolData, we should search it for any toolData
+        // related to the current Measurement
+        const toolData = toolState[imageId][toolType].data;
+
+        // Create a flag so we know if we have successfully updated
+        // this Measurement's in the toolData
+        let alreadyExists = false;
+
+        // Loop through the toolData to search for this Measurement
+        toolData.forEach(function(tool) {
+            // Break the loop if this isn't the Measurement we are looking for
+            if (tool._id !== measurement._id) {
+                return;
+            }
+
+            // If we have found the Measurement, set the flag to True
+            alreadyExists = true;
+
+            // Update the toolData from the Measurement data
+            $.extend(tool, measurement);
+            return false;
+        });
+
+        // If we have found the Measurement we intended to update, we can stop
+        // this function here
+        if (alreadyExists === true) {
+            return;
+        }
+    } else {
+        // If no toolData exists for this toolType, create an empty array to hold some
+        toolState[imageId][toolType] = {
+            data: []
+        };
+    }
+
+    // If we have reached this point, it means we haven't found the Measurement we are
+    // looking for in the current toolData. This means we need to add it.
+
+    // Add the MeasurementData into the toolData for this imageId
+    toolState[imageId][toolType].data.push(measurement);
+};