LT-242: Sharing same timepoints source among all the sub-templates that use it

Packages/lesiontracker/lib/api/timepoint.js

@@ -0,0 +1,88 @@
+class TimepointApi {
+
+    constructor() {
+        // Run this computation everytime the timepoints are changed
+        Tracker.autorun(() => {
+            // Get all the timepoints and store it
+            this.timepoints = new Mongo.Collection(null);
+            const timepoints = Timepoints.find({}, {
+                sort: {
+                    latestDate: -1
+                }
+            }).fetch();
+            _.each(timepoints, timepoint => this.timepoints.insert(timepoint));
+        });
+    }
+
+    // Return all timepoints
+    all() {
+        return this.timepoints.find().fetch();
+    }
+
+    // Return only the current and prior timepoints
+    latest() {
+        const options = {
+            limit: 2
+        };
+        return this.timepoints.find({}, options).fetch();
+    }
+
+    // Return only the key timepoints (current, prior, nadir and baseline)
+    key() {
+        // Create a new Mini Mongo Collection to store the result
+        const result = new Mongo.Collection(null);
+
+        // Get all the timepoints
+        const all = this.all();
+
+        // Iterate over each timepoint and insert the key ones in the result
+        _.each(all, (timepoint, index) => {
+            if (index < 2 || index === (all.length - 1)) {
+                result.insert(timepoint);
+            }
+        });
+
+        // Return the resulting timepoints
+        return result.find().fetch();
+    }
+
+    // Return only the timepoints for the given study
+    study(studyInstanceUid) {
+        // Create a new Mini Mongo Collection to store the result
+        const result = new Mongo.Collection(null);
+
+        // Iterate over each timepoint and insert the key ones in the result
+        _.each(this.all(), (timepoint, index) => {
+            if (_.contains(timepoint.studyInstanceUids, studyInstanceUid)) {
+                result.insert(timepoint);
+            }
+        });
+
+        // Return the resulting timepoints
+        return result.find().fetch();
+    }
+
+    // Build the timepoint title based on its date
+    title(timepoint) {
+        const timepointName = getTimepointName(timepoint);
+
+        const all = this.all();
+        let index = -1;
+        _.each(all, (currentTimepoint, currentIndex) => {
+            if (currentTimepoint.timepointId === timepoint.timepointId) {
+                index = currentIndex;
+            }
+        });
+
+        const states = {
+            0: '(Current)',
+            1: '(Prior)'
+        };
+        // TODO: [design] find out how to define the nadir timepoint
+        const parenthesis = states[index] || '';
+        return `${timepointName} ${parenthesis}`;
+    }
+
+}
+
+export { TimepointApi };