Grade report celery task and direct file push to S3 from the new instructor dashboard.

Hook up display of grade files ready for download to new instructor dashboard.

LMS-58

lms/static/coffee/src/instructor_dashboard/data_download.coffee

@@ -21,9 +21,12 @@ class DataDownload
     @$display_text           = @$display.find '.data-display-text'
     @$display_table          = @$display.find '.data-display-table'
     @$request_response_error = @$display.find '.request-response-error'
+
     @$list_studs_btn = @$section.find("input[name='list-profiles']'")
     @$list_anon_btn = @$section.find("input[name='list-anon-ids']'")
     @$grade_config_btn = @$section.find("input[name='dump-gradeconf']'")
+
+    @grade_downloads = new GradeDownloads(@$section)
     @instructor_tasks = new (PendingInstructorTasks()) @$section
 
     # attach click handlers
@@ -84,10 +87,14 @@ class DataDownload
           @$display_text.html data['grading_config_summary']
 
   # handler for when the section title is clicked.
-  onClickTitle: -> @instructor_tasks.task_poller.start()
+  onClickTitle: ->
+    @instructor_tasks.task_poller.start()
+    @grade_downloads.downloads_poller.start()
 
   # handler for when the section is closed
-  onExit: -> @instructor_tasks.task_poller.stop()
+  onExit: ->
+    @instructor_tasks.task_poller.stop()
+    @grade_downloads.downloads_poller.stop()
 
   clear_display: ->
     @$display_text.empty()
@@ -95,6 +102,69 @@ class DataDownload
     @$request_response_error.empty()
 
 
+class GradeDownloads
+  ### Grade Downloads -- links expire quickly, so we refresh every 5 mins ####
+  constructor: (@$section) ->
+    @$grade_downloads_table = @$section.find ".grade-downloads-table"
+    @$calculate_grades_csv_btn = @$section.find("input[name='calculate-grades-csv']'")
+
+    @$display                = @$section.find '.data-display'
+    @$display_text           = @$display.find '.data-display-text'
+    @$request_response_error = @$display.find '.request-response-error'
+
+    POLL_INTERVAL = 1000 * 60 * 5 # 5 minutes in ms
+    @downloads_poller = new window.InstructorDashboard.util.IntervalManager(
+      POLL_INTERVAL, => @reload_grade_downloads()
+    )
+
+    @$calculate_grades_csv_btn.click (e) =>
+      url = @$calculate_grades_csv_btn.data 'endpoint'
+      $.ajax
+        dataType: 'json'
+        url: url
+        error: std_ajax_err =>
+          @$request_response_error.text "Error generating grades."
+        success: (data) =>
+          @$display_text.html data['status']
+
+  reload_grade_downloads: ->
+    endpoint = @$grade_downloads_table.data 'endpoint'
+    $.ajax
+      dataType: 'json'
+      url: endpoint
+      success: (data) =>
+        if data.downloads.length
+          @create_grade_downloads_table data.downloads
+        else
+          console.log "No grade CSVs ready for download"
+      error: std_ajax_err => console.error "Error finding grade download CSVs"
+
+  create_grade_downloads_table: (grade_downloads_data) ->
+    @$grade_downloads_table.empty()
+
+    options =
+      enableCellNavigation: true
+      enableColumnReorder: false
+      autoHeight: true
+      forceFitColumns: true
+
+    columns = [
+      id: 'link'
+      field: 'link'
+      name: 'File'
+      sortable: false,
+      minWidth: 200,
+      formatter: (row, cell, value, columnDef, dataContext) ->
+        '<a href="' + dataContext['url'] + '">' + dataContext['name'] + '</a>'
+    ]
+
+    $table_placeholder = $ '<div/>', class: 'slickgrid'
+    @$grade_downloads_table.append $table_placeholder
+    grid = new Slick.Grid($table_placeholder, grade_downloads_data, columns, options)
+
+
+
+
 # export for use
 # create parent namespaces if they do not already exist.
 _.defaults window, InstructorDashboard: {}