init commit

lib/workload_service/projectors/task_projector.ex

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+defmodule WorkloadService.Projectors.TaskProjector do
+  use Commanded.Projections.Ecto,
+    application: WorkloadService.CommandedApp,
+    repo: WorkloadService.Repo,
+    name: "TaskProjector"
+
+  alias WorkloadService.Aggregates.TaskId
+  alias WorkloadService.Events
+  alias WorkloadService.Projections.Task
+  import Ecto.Query
+
+  project(%Events.TaskCreated{} = e, _meta, fn multi ->
+    task_id = TaskId.parse!(to_string(e.id))
+    %{org_id: org_id} = task_id
+
+    Ecto.Multi.insert(multi, :task, %Task{
+      id: to_string(e.id),
+      org_id: org_id,
+      application_id: e.application_id,
+      provider_id: e.provider_id,
+      provider_name: e.provider_name,
+      task_info: e.task_info,
+      attachments: e.attachments || [],
+      status: "created"
+    })
+  end)
+
+  project(%Events.SubmissionUpdated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ ->
+      {:ok, repo.get(Task, to_string(e.id))}
+    end)
+    |> Ecto.Multi.update(:task, fn %{fetch: task} ->
+      Ecto.Changeset.change(task, %{
+        status: "draft",
+        submission: e.submission,
+        attachments: e.attachments || []
+      })
+    end)
+  end)
+
+  project(%Events.SubmissionApproved{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ ->
+      {:ok, repo.get(Task, to_string(e.id))}
+    end)
+    |> Ecto.Multi.update(:task, fn %{fetch: task} ->
+      Ecto.Changeset.change(task, %{status: "approved"})
+    end)
+  end)
+
+  project(%Events.TaskCompleted{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ ->
+      {:ok, repo.get(Task, to_string(e.id))}
+    end)
+    |> Ecto.Multi.update(:task, fn %{fetch: task} ->
+      Ecto.Changeset.change(task, %{status: "completed"})
+    end)
+  end)
+end