populate tasks from json files

services/app/apps/codebattle/lib/codebattle/utils/populate_tasks.ex

@@ -0,0 +1,17 @@
+defmodule Codebattle.Utils.PopulateTasks do
+  @moduledoc false
+
+  def from_dir!(dir) do
+    dir
+    |> File.ls!()
+    |> Enum.each(&process_file(dir, &1))
+  end
+
+  defp process_file(dir, file) do
+    dir
+    |> Path.join(file)
+    |> File.read!()
+    |> Jason.decode!(keys: :atoms)
+    |> Codebattle.Task.upsert!()
+  end
+end

services/app/apps/codebattle/test/codebattle/utils/populate_tasks_test.exs

@@ -0,0 +1,76 @@
+defmodule Codebattle.Utils.PopulateTasksTest do
+  use Codebattle.DataCase, async: true
+
+  test "from_dir!" do
+    dir = Temp.mkdir!()
+
+    task1 = """
+    {
+      "name": "testtask1",
+      "level": "elementary",
+      "examples": "none",
+      "origin": "user",
+      "state": "active",
+      "description_ru": "",
+      "description_en": "none",
+      "tags": [],
+      "visibility": "public",
+      "input_signature": [{
+        "argument_name": "ping",
+        "type": {
+          "name": "string"
+        }
+      }],
+      "output_signature": {
+        "type": {
+          "name": "string"
+        }
+      },
+      "asserts": [{
+        "arguments": "ping",
+        "expected": "pong"
+      }]
+    }
+    """
+
+    task2 = """
+    {
+      "name": "testtask2",
+      "level": "medium",
+      "examples": "none",
+      "origin": "user",
+      "state": "active",
+      "description_ru": "",
+      "description_en": "none",
+      "tags": [],
+      "visibility": "public",
+      "input_signature": [{
+        "argument_name": "ping",
+        "type": {
+          "name": "string"
+        }
+      }],
+      "output_signature": {
+        "type": {
+          "name": "string"
+        }
+      },
+      "asserts": [{
+        "arguments": "ping",
+        "expected": "pong"
+      }]
+    }
+    """
+
+    dir
+    |> Path.join("task1.json")
+    |> File.write!(task1)
+
+    dir
+    |> Path.join("task2.json")
+    |> File.write!(task2)
+
+    assert Codebattle.Utils.PopulateTasks.from_dir!(dir) == :ok
+    assert %{name: "testtask2"} = Codebattle.Task |> Ecto.Query.where(name: "testtask2") |> Codebattle.Repo.one!()
+  end
+end