From b7c73d1a322d93a58870c709bbcdaa3a9d8f4b8b Mon Sep 17 00:00:00 2001
From: uzairr <uzairr@yahoo.com>
Date: Mon, 4 Jun 2018 14:32:59 +0500
Subject: [PATCH] Extract course run with highest grades.

if a learner has completed multiple course runs
of each course then they want to see course runs
with highest grades on associated programs.

LEARNER-4351
---
 .../models/course_card_model.js                 | 17 +++++++++++++++++
 .../learner_dashboard/views/course_card_view.js |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/lms/static/js/learner_dashboard/models/course_card_model.js b/lms/static/js/learner_dashboard/models/course_card_model.js
index 59eff07470..2807890764 100644
--- a/lms/static/js/learner_dashboard/models/course_card_model.js
+++ b/lms/static/js/learner_dashboard/models/course_card_model.js
@@ -38,6 +38,23 @@ class CourseCardModel extends Backbone.Model {
     return desiredCourseRun;
   }
 
+  getCourseRunWithHighestGrade(grades) {
+    const allEnrolledCourseRuns = this.context.course_runs.filter(run => run.is_enrolled);
+    if (allEnrolledCourseRuns.length <= 1) {
+      return null;
+    }
+
+    allEnrolledCourseRuns.sort((a, b) => (grades[a.key] || 0) - (grades[b.key] || 0));
+    return allEnrolledCourseRuns[allEnrolledCourseRuns.length - 1];
+  }
+
+  updateCourseRunWithHighestGrade(grades) {
+    const courseRunWithHighestGrade = this.getCourseRunWithHighestGrade(grades);
+    if (courseRunWithHighestGrade) {
+      this.setActiveCourseRun(courseRunWithHighestGrade, this.context.user_preferences);
+    }
+  }
+
   isEnrolledInSession() {
     // Returns true if the user is currently enrolled in a session of the course
     return this.context.course_runs.find(run => run.is_enrolled) !== undefined;
diff --git a/lms/static/js/learner_dashboard/views/course_card_view.js b/lms/static/js/learner_dashboard/views/course_card_view.js
index 9ad242ba92..68429ff2c1 100644
--- a/lms/static/js/learner_dashboard/views/course_card_view.js
+++ b/lms/static/js/learner_dashboard/views/course_card_view.js
@@ -27,6 +27,9 @@ class CourseCardView extends Backbone.View {
       this.enrollModel.urlRoot = this.urlModel.get('commerce_api_url');
     }
     this.context = options.context || {};
+    if (this.context.collectionCourseStatus === 'completed') {
+      this.model.updateCourseRunWithHighestGrade(this.context.courseData.grades);
+    }
     this.grade = this.context.courseData.grades[this.model.get('course_run_key')];
     this.grade = this.grade * 100;
     this.collectionCourseStatus = this.context.collectionCourseStatus || '';