LT-275: Creating measure flow component common section

Packages/ohif-core/server/index.js

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+import './mongo.js';
+import './user.js';

Packages/ohif-core/server/mongo.js

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+import { OHIF } from 'meteor/ohif:core';
+import { Meteor } from 'meteor/meteor';
+
+// Mongo data manipulation utilities
+class MongoUtils {
+
+    // Check if there is an user logged in
+    static validateUser() {
+        // Throw error if there is no user logged in
+        if (!Meteor.userId()) {
+            throw new Meteor.Error('not-authorized');
+        }
+    }
+
+    // Generic callback to MongoDB write operations
+    static writeCallback(error, affected) {
+        // Throw error if it was not possible to complete the write operation
+        if (error) {
+            throw new Meteor.Error('data-write', error);
+        }
+    }
+
+}
+
+// Expose the class in the OHIF object
+OHIF.MongoUtils = MongoUtils;

Packages/ohif-core/server/user.js

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+import { OHIF } from 'meteor/ohif:core';
+import { Meteor } from 'meteor/meteor';
+
+// Manipulate user's persistent data
+class UserData {
+
+    // Get the persistent data by key
+    static get(key) {
+        // Check if there is an user logged in
+        OHIF.MongoUtils.validateUser();
+
+        // Get the user's profile data
+        const profileData = Meteor.user().profile;
+
+        // Return the data if it is set
+        if (profileData.persistent) {
+            return profileData.persistent[key];
+        }
+    }
+
+    // Store the persistent data by giving a key and a value to store
+    static set(key, value) {
+        // Check if there is an user logged in
+        OHIF.MongoUtils.validateUser();
+
+        // Build the query to update only the current user's data
+        var query = {
+            _id: Meteor.userId()
+        };
+
+        // Build the path to the persistent data with the given key
+        const persistentPath = `profile.persistent.${key}`;
+
+        // Build the data to be updated
+        var data = {
+            $set: {
+                [persistentPath]: value
+            }
+        };
+
+        // Update the user's profile data with the persistent information
+        Accounts.users.update(query, data, OHIF.MongoUtils.writeCallback);
+    }
+
+}
+
+// Register the methods
+Meteor.methods({
+    userDataGet: key => UserData.get(key),
+    userDataSet: (key, value) => UserData.set(key, value)
+});
+
+// Expose the class in the OHIF object
+OHIF.UserData = UserData;