Updates for Timepoint assocation (LT-60) and Conformance Checks (LT-92, LT-93, LT-94)

Packages/lesiontracker/lib/getTimepointName.js

@@ -0,0 +1,44 @@
+/**
+ * Calculates a Timepoint's name based on how many timepoints exist between it
+ * and the latest Baseline. Names returned are in the form of 'Baseline', or
+ * 'Follow-up 1', 'Follow-up 2', and so on.
+ *
+ * @param timepoint
+ * @returns {*} The timepoint name
+ */
+getTimepointName = function(timepoint) {
+    // Check if this is a Baseline timepoint, if it is, return 'Baseline'
+    if (timepoint.timepointType === 'baseline') {
+        return 'Baseline';
+    }
+
+    // Retrieve all of the relevant follow-up timepoints for this patient
+    var followupTimepoints = Timepoints.find({
+        patientId: timepoint.patientId,
+        timepointType: timepoint.timepointType
+    }, {
+        sort: {
+            latestDate: 1
+        }
+    });
+
+    // Create an array of just timepointIds, so we can use indexOf
+    // on it to find the current timepoint's relative position
+    var followupTimepointIds = followupTimepoints.map(function(timepoint) {
+        return timepoint.timepointId;
+    });
+
+    // Calculate the index of the current timepoint in the array of all
+    // relevant follow-up timepoints
+    var index = followupTimepointIds.indexOf(timepoint.timepointId) + 1;
+
+    // If index is 0, it means that the current timepoint was not in the list
+    // Log a warning and return here
+    if (!index) {
+        log.warn('Current follow-up was not in the list of relevant follow-ups?');
+        return;
+    }
+
+    // Return the timepoint name as 'Follow-up N'
+    return 'Follow-up ' + index;
+};