init commit

lib/provider_service/aggregates/provider.ex

@@ -0,0 +1,341 @@
+defmodule ProviderService.Aggregates.Provider do
+  defstruct [
+    :provider_id,
+    :name,
+    :email,
+    :phone,
+    :contact_name,
+    :ruc,
+    :address,
+    :active,
+    templates: %{},
+    default_templates: %{}
+  ]
+
+  alias ProviderService.Commands.{
+    RegisterProvider,
+    UpdateProvider,
+    DeactivateProvider,
+    ReactivateProvider,
+    AddProviderTemplate,
+    ActivateProviderTemplate,
+    DeactivateProviderTemplate,
+    SetDefaultProviderTemplate,
+    RemoveProviderTemplate
+  }
+
+  alias ProviderService.Events.{
+    ProviderRegistered,
+    ProviderUpdated,
+    ProviderDeactivated,
+    ProviderReactivated,
+    ProviderTemplateAdded,
+    ProviderTemplateActivated,
+    ProviderTemplateDeactivated,
+    ProviderTemplateDefaultSet,
+    ProviderTemplateRemoved
+  }
+
+  # ---------------------------------------------------------------------------
+  # Execute — Provider
+  # ---------------------------------------------------------------------------
+
+  def execute(%__MODULE__{provider_id: nil}, %RegisterProvider{} = cmd) do
+    %ProviderRegistered{
+      provider_id: cmd.provider_id,
+      name: cmd.name,
+      email: cmd.email,
+      phone: cmd.phone,
+      contact_name: cmd.contact_name,
+      ruc: cmd.ruc,
+      address: cmd.address,
+      registered_at: DateTime.utc_now()
+    }
+  end
+
+  def execute(%__MODULE__{active: false}, %UpdateProvider{}),
+    do: {:error, :provider_inactive}
+
+  def execute(%__MODULE__{} = agg, %UpdateProvider{} = cmd) do
+    %ProviderUpdated{
+      provider_id: agg.provider_id,
+      name: cmd.name,
+      email: cmd.email,
+      phone: cmd.phone,
+      contact_name: cmd.contact_name,
+      ruc: cmd.ruc,
+      address: cmd.address,
+      updated_at: DateTime.utc_now()
+    }
+  end
+
+  def execute(%__MODULE__{active: false}, %DeactivateProvider{}),
+    do: {:error, :already_inactive}
+
+  def execute(%__MODULE__{} = agg, %DeactivateProvider{} = cmd) do
+    %ProviderDeactivated{
+      provider_id: agg.provider_id,
+      deactivated_by: cmd.deactivated_by,
+      deactivated_at: DateTime.utc_now()
+    }
+  end
+
+  def execute(%__MODULE__{active: true}, %ReactivateProvider{}),
+    do: {:error, :already_active}
+
+  def execute(%__MODULE__{} = agg, %ReactivateProvider{} = cmd) do
+    %ProviderReactivated{
+      provider_id: agg.provider_id,
+      reactivated_by: cmd.reactivated_by,
+      reactivated_at: DateTime.utc_now()
+    }
+  end
+
+  # ---------------------------------------------------------------------------
+  # Execute — Templates
+  # ---------------------------------------------------------------------------
+
+  def execute(%__MODULE__{active: false}, %AddProviderTemplate{}),
+    do: {:error, :provider_inactive}
+
+  def execute(%__MODULE__{} = agg, %AddProviderTemplate{} = cmd) do
+    existing = get_in(agg.templates, [cmd.policy_type, cmd.client_type]) || []
+    version = length(existing) + 1
+
+    %ProviderTemplateAdded{
+      provider_id: agg.provider_id,
+      template_id: cmd.template_id,
+      policy_type: cmd.policy_type,
+      client_type: cmd.client_type,
+      s3_key: cmd.s3_key,
+      fields: cmd.fields,
+      version: version,
+      added_at: DateTime.utc_now()
+    }
+  end
+
+  def execute(%__MODULE__{} = agg, %ActivateProviderTemplate{} = cmd) do
+    case find_template(agg, cmd.policy_type, cmd.client_type, cmd.template_id) do
+      nil ->
+        {:error, :template_not_found}
+
+      _ ->
+        %ProviderTemplateActivated{
+          provider_id: agg.provider_id,
+          template_id: cmd.template_id,
+          policy_type: cmd.policy_type,
+          client_type: cmd.client_type,
+          activated_at: DateTime.utc_now()
+        }
+    end
+  end
+
+  def execute(%__MODULE__{} = agg, %DeactivateProviderTemplate{} = cmd) do
+    case find_template(agg, cmd.policy_type, cmd.client_type, cmd.template_id) do
+      nil ->
+        {:error, :template_not_found}
+
+      _ ->
+        %ProviderTemplateDeactivated{
+          provider_id: agg.provider_id,
+          template_id: cmd.template_id,
+          policy_type: cmd.policy_type,
+          client_type: cmd.client_type,
+          deactivated_at: DateTime.utc_now()
+        }
+    end
+  end
+
+  def execute(%__MODULE__{} = agg, %SetDefaultProviderTemplate{} = cmd) do
+    case find_template(agg, cmd.policy_type, cmd.client_type, cmd.template_id) do
+      nil ->
+        {:error, :template_not_found}
+
+      %{active: false} ->
+        {:error, :template_not_active}
+
+      _ ->
+        %ProviderTemplateDefaultSet{
+          provider_id: agg.provider_id,
+          template_id: cmd.template_id,
+          policy_type: cmd.policy_type,
+          client_type: cmd.client_type,
+          set_at: DateTime.utc_now()
+        }
+    end
+  end
+
+  def execute(%__MODULE__{} = agg, %RemoveProviderTemplate{} = cmd) do
+    case find_template(agg, cmd.policy_type, cmd.client_type, cmd.template_id) do
+      nil ->
+        {:error, :template_not_found}
+
+      _ ->
+        %ProviderTemplateRemoved{
+          provider_id: agg.provider_id,
+          template_id: cmd.template_id,
+          policy_type: cmd.policy_type,
+          client_type: cmd.client_type,
+          removed_at: DateTime.utc_now()
+        }
+    end
+  end
+
+  # ---------------------------------------------------------------------------
+  # Apply — Provider
+  # ---------------------------------------------------------------------------
+
+  def apply(%__MODULE__{} = agg, %ProviderRegistered{} = e) do
+    %__MODULE__{
+      agg
+      | provider_id: e.provider_id,
+        name: e.name,
+        email: e.email,
+        phone: e.phone,
+        contact_name: e.contact_name,
+        ruc: e.ruc,
+        address: e.address,
+        active: true
+    }
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderUpdated{} = e) do
+    %__MODULE__{
+      agg
+      | name: e.name,
+        email: e.email,
+        phone: e.phone,
+        contact_name: e.contact_name,
+        ruc: e.ruc,
+        address: e.address
+    }
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderDeactivated{}),
+    do: %__MODULE__{agg | active: false}
+
+  def apply(%__MODULE__{} = agg, %ProviderReactivated{}),
+    do: %__MODULE__{agg | active: true}
+
+  # ---------------------------------------------------------------------------
+  # Apply — Templates
+  # ---------------------------------------------------------------------------
+
+  def apply(%__MODULE__{} = agg, %ProviderTemplateAdded{} = e) do
+    existing = get_in(agg.templates, [e.policy_type, e.client_type]) || []
+
+    templates =
+      agg.templates
+      |> Map.update(e.policy_type, %{e.client_type => []}, fn inner ->
+        Map.update(inner, e.client_type, [], fn list -> list end)
+      end)
+      |> put_in(
+        [e.policy_type, e.client_type],
+        existing ++
+          [
+            %{
+              template_id: e.template_id,
+              s3_key: e.s3_key,
+              fields: e.fields,
+              version: e.version,
+              active: true
+            }
+          ]
+      )
+
+    %__MODULE__{agg | templates: templates}
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderTemplateActivated{} = e) do
+    templates =
+      update_template(
+        agg.templates,
+        e.policy_type,
+        e.client_type,
+        e.template_id,
+        &Map.put(&1, :active, true)
+      )
+
+    %__MODULE__{agg | templates: templates}
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderTemplateDeactivated{} = e) do
+    templates =
+      update_template(
+        agg.templates,
+        e.policy_type,
+        e.client_type,
+        e.template_id,
+        &Map.put(&1, :active, false)
+      )
+
+    template_id = e.template_id
+    # Clear default if the deactivated template was the default
+    default_templates =
+      case get_in(agg.default_templates, [e.policy_type, e.client_type]) do
+        ^template_id ->
+          update_in(agg.default_templates, [e.policy_type], &Map.delete(&1, e.client_type))
+
+        _ ->
+          agg.default_templates
+      end
+
+    %__MODULE__{agg | templates: templates, default_templates: default_templates}
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderTemplateDefaultSet{} = e) do
+    default_templates =
+      agg.default_templates
+      |> Map.update(e.policy_type, %{e.client_type => e.template_id}, fn inner ->
+        Map.put(inner, e.client_type, e.template_id)
+      end)
+
+    %__MODULE__{agg | default_templates: default_templates}
+  end
+
+  def apply(%__MODULE__{} = agg, %ProviderTemplateRemoved{} = e) do
+    templates =
+      agg.templates
+      |> update_in([e.policy_type, e.client_type], fn list ->
+        Enum.reject(list || [], &(&1.template_id == e.template_id))
+      end)
+
+    template_id = e.template_id
+    # Clear default if the removed template was the default
+    default_templates =
+      case get_in(agg.default_templates, [e.policy_type, e.client_type]) do
+        ^template_id ->
+          update_in(agg.default_templates, [e.policy_type], &Map.delete(&1, e.client_type))
+
+        _ ->
+          agg.default_templates
+      end
+
+    %__MODULE__{agg | templates: templates, default_templates: default_templates}
+  end
+
+  # ---------------------------------------------------------------------------
+  # Helpers
+  # ---------------------------------------------------------------------------
+
+  # templates structure: %{ policy_type => %{ client_type => [%{template_id, ...}] } }
+  # default_templates:   %{ policy_type => %{ client_type => template_id } }
+
+  defp find_template(agg, policy_type, client_type, template_id) do
+    agg.templates
+    |> get_in([policy_type, client_type])
+    |> List.wrap()
+    |> Enum.find(&(&1.template_id == template_id))
+  end
+
+  defp update_template(templates, policy_type, client_type, template_id, fun) do
+    templates
+    |> Map.update(policy_type, %{}, fn inner ->
+      Map.update(inner, client_type, [], fn list ->
+        Enum.map(list, fn t ->
+          if t.template_id == template_id, do: fun.(t), else: t
+        end)
+      end)
+    end)
+  end
+end

lib/provider_service/application.ex

@@ -0,0 +1,15 @@
+defmodule ProviderService.Application do
+  use Application
+
+  def start(_type, _args) do
+    children = [
+      ProviderService.Repo,
+      ProviderService.CommandedApp,
+      ProviderService.Projections.ProviderProjection,
+      ProviderServiceWeb.Endpoint
+    ]
+
+    opts = [strategy: :one_for_one, name: ProviderService.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end

lib/provider_service/commanded_app.ex

@@ -0,0 +1,40 @@
+defmodule ProviderService.Router do
+  use Commanded.Commands.Router
+
+  alias ProviderService.Aggregates.Provider
+
+  alias ProviderService.Commands.{
+    RegisterProvider,
+    UpdateProvider,
+    DeactivateProvider,
+    ReactivateProvider,
+    AddProviderTemplate,
+    ActivateProviderTemplate,
+    DeactivateProviderTemplate,
+    SetDefaultProviderTemplate,
+    RemoveProviderTemplate
+  }
+
+  identify(Provider, by: :provider_id)
+
+  dispatch(
+    [
+      RegisterProvider,
+      UpdateProvider,
+      DeactivateProvider,
+      ReactivateProvider,
+      AddProviderTemplate,
+      ActivateProviderTemplate,
+      DeactivateProviderTemplate,
+      SetDefaultProviderTemplate,
+      RemoveProviderTemplate
+    ],
+    to: Provider
+  )
+end
+
+defmodule ProviderService.CommandedApp do
+  use Commanded.Application, otp_app: :provider_service
+
+  router(ProviderService.Router)
+end

lib/provider_service/commands/provider.ex

@@ -0,0 +1,37 @@
+defmodule ProviderService.Commands do
+  defmodule RegisterProvider do
+    defstruct [:provider_id, :name, :email, :phone, :contact_name, :ruc, :address]
+  end
+
+  defmodule UpdateProvider do
+    defstruct [:provider_id, :name, :email, :phone, :contact_name, :ruc, :address]
+  end
+
+  defmodule DeactivateProvider do
+    defstruct [:provider_id, :deactivated_by]
+  end
+
+  defmodule ReactivateProvider do
+    defstruct [:provider_id, :reactivated_by]
+  end
+
+  defmodule AddProviderTemplate do
+    defstruct [:provider_id, :template_id, :policy_type, :s3_key, :fields, :client_type]
+  end
+
+  defmodule ActivateProviderTemplate do
+    defstruct [:provider_id, :template_id, :policy_type, :client_type]
+  end
+
+  defmodule DeactivateProviderTemplate do
+    defstruct [:provider_id, :template_id, :policy_type, :client_type]
+  end
+
+  defmodule SetDefaultProviderTemplate do
+    defstruct [:provider_id, :template_id, :policy_type, :client_type]
+  end
+
+  defmodule RemoveProviderTemplate do
+    defstruct [:provider_id, :template_id, :policy_type, :client_type]
+  end
+end

lib/provider_service/event_store.ex

@@ -0,0 +1,3 @@
+defmodule ProviderService.EventStore do
+  use EventStore, otp_app: :provider_service
+end

lib/provider_service/events/provider.ex

@@ -0,0 +1,55 @@
+defmodule ProviderService.Events do
+  defmodule ProviderRegistered do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :name, :email, :phone, :contact_name, :ruc, :address, :registered_at]
+  end
+
+  defmodule ProviderUpdated do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :name, :email, :phone, :contact_name, :ruc, :address, :updated_at]
+  end
+
+  defmodule ProviderDeactivated do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :deactivated_by, :deactivated_at]
+  end
+
+  defmodule ProviderReactivated do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :reactivated_by, :reactivated_at]
+  end
+
+  defmodule ProviderTemplateAdded do
+    @derive Jason.Encoder
+    defstruct [
+      :provider_id,
+      :template_id,
+      :policy_type,
+      :s3_key,
+      :fields,
+      :version,
+      :added_at,
+      :client_type
+    ]
+  end
+
+  defmodule ProviderTemplateActivated do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :template_id, :policy_type, :activated_at, :client_type]
+  end
+
+  defmodule ProviderTemplateDeactivated do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :template_id, :policy_type, :deactivated_at, :client_type]
+  end
+
+  defmodule ProviderTemplateDefaultSet do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :template_id, :policy_type, :set_at, :client_type]
+  end
+
+  defmodule ProviderTemplateRemoved do
+    @derive Jason.Encoder
+    defstruct [:provider_id, :template_id, :policy_type, :removed_at, :client_type]
+  end
+end

lib/provider_service/projections/provider.ex

@@ -0,0 +1,34 @@
+defmodule ProviderService.Projections.Provider do
+  use Ecto.Schema
+
+  @derive {
+    Flop.Schema,
+    filterable: [:active, :search],
+    sortable: [:name, :inserted_at],
+    default_limit: 20,
+    max_limit: 100,
+    custom_fields: [
+      search: [
+        filter: {ProviderService.Projections.ProviderFilters, :search, []},
+        ecto_type: :string,
+        operators: [:==]
+      ]
+    ]
+  }
+
+  @primary_key {:provider_id, :string, autogenerate: false}
+
+  schema "providers" do
+    field(:name, :string)
+    field(:email, :string)
+    field(:phone, :string)
+    field(:contact_name, :string)
+    field(:ruc, :string)
+    field(:address, :string)
+    field(:active, :boolean, default: true)
+    field(:templates, :map, default: %{})
+    field(:default_templates, :map, default: %{})
+
+    timestamps(type: :utc_datetime_usec)
+  end
+end

lib/provider_service/projections/provider_filters.ex

@@ -0,0 +1,16 @@
+defmodule ProviderService.Projections.ProviderFilters do
+  import Ecto.Query
+
+  def search(query, %Flop.Filter{value: value}, _opts) do
+    term = "%#{value}%"
+
+    where(
+      query,
+      [p],
+      ilike(p.name, ^term) or
+        ilike(p.email, ^term) or
+        ilike(p.contact_name, ^term) or
+        ilike(p.ruc, ^term)
+    )
+  end
+end

lib/provider_service/projections/provider_projection.ex

@@ -0,0 +1,196 @@
+defmodule ProviderService.Projections.ProviderProjection do
+  use Commanded.Projections.Ecto,
+    application: ProviderService.CommandedApp,
+    repo: ProviderService.Repo,
+    name: "ProviderProjection",
+    consistency: :strong
+
+  alias ProviderService.Events.{
+    ProviderRegistered,
+    ProviderUpdated,
+    ProviderDeactivated,
+    ProviderReactivated,
+    ProviderTemplateAdded,
+    ProviderTemplateActivated,
+    ProviderTemplateDeactivated,
+    ProviderTemplateDefaultSet,
+    ProviderTemplateRemoved
+  }
+
+  alias ProviderService.Projections.Provider
+  import Ecto.Query
+
+  project(%ProviderRegistered{} = e, _meta, fn multi ->
+    Ecto.Multi.insert(multi, :provider, %Provider{
+      provider_id: e.provider_id,
+      name: e.name,
+      email: e.email,
+      phone: e.phone,
+      contact_name: e.contact_name,
+      ruc: e.ruc,
+      address: e.address,
+      active: true,
+      templates: %{},
+      default_templates: %{}
+    })
+  end)
+
+  project(%ProviderUpdated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      Ecto.Changeset.change(p,
+        name: e.name,
+        email: e.email,
+        phone: e.phone,
+        contact_name: e.contact_name,
+        ruc: e.ruc,
+        address: e.address
+      )
+    end)
+  end)
+
+  project(%ProviderDeactivated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      Ecto.Changeset.change(p, active: false)
+    end)
+  end)
+
+  project(%ProviderReactivated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      Ecto.Changeset.change(p, active: true)
+    end)
+  end)
+
+  # templates:         %{ policy_type => %{ client_type => [template] } }
+  # default_templates: %{ policy_type => %{ client_type => template_id } }
+
+  project(%ProviderTemplateAdded{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      template = %{
+        "template_id" => e.template_id,
+        "client_type" => e.client_type,
+        "s3_key" => e.s3_key,
+        "fields" => e.fields || [],
+        "version" => e.version,
+        "active" => false
+      }
+
+      updated =
+        p.templates
+        |> Map.update(e.policy_type, %{e.client_type => [template]}, fn inner ->
+          Map.update(inner, e.client_type, [template], fn list -> list ++ [template] end)
+        end)
+
+      Ecto.Changeset.change(p, templates: updated)
+    end)
+  end)
+
+  project(%ProviderTemplateActivated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      updated =
+        update_template_field(
+          p.templates,
+          e.policy_type,
+          e.client_type,
+          e.template_id,
+          "active",
+          true
+        )
+
+      Ecto.Changeset.change(p, templates: updated)
+    end)
+  end)
+
+  project(%ProviderTemplateDeactivated{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      updated =
+        update_template_field(
+          p.templates,
+          e.policy_type,
+          e.client_type,
+          e.template_id,
+          "active",
+          false
+        )
+
+      template_id = e.template_id
+
+      default_templates =
+        case get_in(p.default_templates, [e.policy_type, e.client_type]) do
+          ^template_id ->
+            Map.update(p.default_templates, e.policy_type, %{}, &Map.delete(&1, e.client_type))
+
+          _ ->
+            p.default_templates
+        end
+
+      Ecto.Changeset.change(p, templates: updated, default_templates: default_templates)
+    end)
+  end)
+
+  project(%ProviderTemplateDefaultSet{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      default_templates =
+        p.default_templates
+        |> Map.update(e.policy_type, %{e.client_type => e.template_id}, fn inner ->
+          Map.put(inner, e.client_type, e.template_id)
+        end)
+
+      Ecto.Changeset.change(p, default_templates: default_templates)
+    end)
+  end)
+
+  project(%ProviderTemplateRemoved{} = e, _meta, fn multi ->
+    multi
+    |> Ecto.Multi.run(:fetch, fn repo, _ -> {:ok, repo.get!(Provider, e.provider_id)} end)
+    |> Ecto.Multi.update(:provider, fn %{fetch: p} ->
+      updated =
+        p.templates
+        |> Map.update(e.policy_type, %{}, fn inner ->
+          Map.update(inner, e.client_type, [], fn list ->
+            Enum.reject(list, &(&1["template_id"] == e.template_id))
+          end)
+        end)
+
+      template_id = e.template_id
+
+      default_templates =
+        case get_in(p.default_templates, [e.policy_type, e.client_type]) do
+          ^template_id ->
+            Map.update(p.default_templates, e.policy_type, %{}, &Map.delete(&1, e.client_type))
+
+          _ ->
+            p.default_templates
+        end
+
+      Ecto.Changeset.change(p, templates: updated, default_templates: default_templates)
+    end)
+  end)
+
+  # ---------------------------------------------------------------------------
+  # Helpers
+  # ---------------------------------------------------------------------------
+
+  defp update_template_field(templates, policy_type, client_type, template_id, field, value) do
+    Map.update(templates, policy_type, %{}, fn inner ->
+      Map.update(inner, client_type, [], fn list ->
+        Enum.map(list, fn t ->
+          if t["template_id"] == template_id, do: Map.put(t, field, value), else: t
+        end)
+      end)
+    end)
+  end
+end

lib/provider_service/provider_service.ex

@@ -0,0 +1,18 @@
+defmodule ProviderService do
+  @moduledoc """
+  Documentation for `ProviderService`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> ProviderService.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end

lib/provider_service/queries/provider_queries.ex

@@ -0,0 +1,34 @@
+defmodule ProviderService.Queries.ProviderQueries do
+  alias ProviderService.Projections.Provider
+  alias ProviderService.Repo
+
+  def list_providers(params \\ %{}) do
+    Flop.validate_and_run(Provider, params, for: Provider)
+  end
+
+  def get_provider(provider_id) do
+    case Repo.get(Provider, provider_id) do
+      nil -> {:error, :not_found}
+      provider -> {:ok, provider}
+    end
+  end
+
+  def get_active_template(provider_id, policy_type) do
+    with {:ok, provider} <- get_provider(provider_id) do
+      default_id = Map.get(provider.default_templates, policy_type)
+      templates = Map.get(provider.templates, policy_type, [])
+
+      result =
+        if default_id do
+          Enum.find(templates, &(&1["template_id"] == default_id))
+        else
+          Enum.find(templates, &(&1["active"] == true))
+        end
+
+      case result do
+        nil -> {:error, :no_active_template}
+        template -> {:ok, template}
+      end
+    end
+  end
+end

lib/provider_service/repo.ex

@@ -0,0 +1,5 @@
+defmodule ProviderService.Repo do
+  use Ecto.Repo,
+    otp_app: :provider_service,
+    adapter: Ecto.Adapters.Postgres
+end

lib/provider_service/s3.ex

@@ -0,0 +1,38 @@
+defmodule ProviderService.S3 do
+  @bucket Application.compile_env(:provider_service, :s3_bucket, "policy-bucket")
+
+  def presigned_upload_url(s3_key) do
+    {:ok, url} =
+      ExAws.Config.new(:s3)
+      |> ExAws.S3.presigned_url(:put, @bucket, s3_key,
+        expires_in: 900,
+        query_params: [{"Content-Type", "application/pdf"}]
+      )
+
+    url
+  end
+
+  def presigned_download_url(s3_key) do
+    {:ok, url} =
+      ExAws.Config.new(:s3)
+      |> ExAws.S3.presigned_url(:get, @bucket, s3_key, expires_in: 3600)
+
+    url
+  end
+
+  def delete(s3_key) do
+    ExAws.S3.delete_object(@bucket, s3_key)
+    |> ExAws.request()
+  end
+
+  def upload(local_path, s3_key) do
+    local_path
+    |> File.read!()
+    |> then(&ExAws.S3.put_object(@bucket, s3_key, &1, content_type: "application/pdf"))
+    |> ExAws.request()
+    |> case do
+      {:ok, _} -> :ok
+      {:error, e} -> {:error, inspect(e)}
+    end
+  end
+end