Create endpoint for retrieval of all assessment submissions (#1210)

* Add endpoint

* Shorten comments

* Formatting

* Formatting (again)

* Revert seed change

---------

Co-authored-by: Richard Dominick <34370238+RichDom2185@users.noreply.github.com>

lib/cadet_web/admin_controllers/admin_grading_controller.ex

@@ -58,6 +58,17 @@ defmodule CadetWeb.AdminGradingController do
     index(conn, %{"group" => "false"})
   end
 
+  def index_all_submissions(conn, _) do
+    index(
+      conn,
+      %{
+        "group" => "false",
+        "pageSize" => "100000000000",
+        "offset" => "0"
+      }
+    )
+  end
+
   def show(conn, %{"submissionid" => submission_id}) when is_ecto_id(submission_id) do
     case Assessments.get_answers_in_submission(submission_id) do
       {:ok, {answers, assessment}} ->

lib/cadet_web/router.ex

@@ -144,6 +144,8 @@ defmodule CadetWeb.Router do
     post("/assessments/:assessmentid", AdminAssessmentsController, :update)
     delete("/assessments/:assessmentid", AdminAssessmentsController, :delete)
 
+    get("/grading/all_submissions", AdminGradingController, :index_all_submissions)
+
     post(
       "/grading/:assessmentid/publish_all_grades",
       AdminGradingController,