add base resources for podcast context

lib/radiator/podcast.ex

@@ -0,0 +1,293 @@
+defmodule Radiator.Podcast do
+  @moduledoc """
+  The Podcasts context.
+  Handles repo operations for networks, shows and episodes.
+  """
+
+  import Ecto.Query, warn: false
+  alias Radiator.Repo
+
+  alias Radiator.Podcast.{Episode, Network, Show}
+
+  @doc """
+  Returns the list of networks.
+
+  ## Examples
+
+      iex> list_networks()
+      [%Network{}, ...]
+
+  """
+  def list_networks do
+    Repo.all(Network)
+  end
+
+  @doc """
+  Gets a single network.
+
+  Raises `Ecto.NoResultsError` if the Network does not exist.
+
+  ## Examples
+
+      iex> get_network!(123)
+      %Network{}
+
+      iex> get_network!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_network!(id), do: Repo.get!(Network, id)
+
+  @doc """
+  Creates a network.
+
+  ## Examples
+
+      iex> create_network(%{field: value})
+      {:ok, %Network{}}
+
+      iex> create_network(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_network(attrs \\ %{}) do
+    %Network{}
+    |> Network.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a network.
+
+  ## Examples
+
+      iex> update_network(network, %{field: new_value})
+      {:ok, %Network{}}
+
+      iex> update_network(network, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_network(%Network{} = network, attrs) do
+    network
+    |> Network.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a network.
+
+  ## Examples
+
+      iex> delete_network(network)
+      {:ok, %Network{}}
+
+      iex> delete_network(network)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_network(%Network{} = network) do
+    Repo.delete(network)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking network changes.
+
+  ## Examples
+
+      iex> change_network(network)
+      %Ecto.Changeset{data: %Network{}}
+
+  """
+  def change_network(%Network{} = network, attrs \\ %{}) do
+    Network.changeset(network, attrs)
+  end
+
+  @doc """
+  Returns the list of shows.
+
+  ## Examples
+
+      iex> list_shows()
+      [%Show{}, ...]
+
+  """
+  def list_shows do
+    Repo.all(Show)
+  end
+
+  @doc """
+  Gets a single show.
+
+  Raises `Ecto.NoResultsError` if the Show does not exist.
+
+  ## Examples
+
+      iex> get_show!(123)
+      %Show{}
+
+      iex> get_show!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_show!(id), do: Repo.get!(Show, id)
+
+  @doc """
+  Creates a show.
+
+  ## Examples
+
+      iex> create_show(%{field: value})
+      {:ok, %Show{}}
+
+      iex> create_show(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_show(attrs \\ %{}) do
+    %Show{}
+    |> Show.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a show.
+
+  ## Examples
+
+      iex> update_show(show, %{field: new_value})
+      {:ok, %Show{}}
+
+      iex> update_show(show, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_show(%Show{} = show, attrs) do
+    show
+    |> Show.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a show.
+
+  ## Examples
+
+      iex> delete_show(show)
+      {:ok, %Show{}}
+
+      iex> delete_show(show)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_show(%Show{} = show) do
+    Repo.delete(show)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking show changes.
+
+  ## Examples
+
+      iex> change_show(show)
+      %Ecto.Changeset{data: %Show{}}
+
+  """
+  def change_show(%Show{} = show, attrs \\ %{}) do
+    Show.changeset(show, attrs)
+  end
+
+  @doc """
+  Returns the list of episodes.
+
+  ## Examples
+
+      iex> list_episodes()
+      [%Episode{}, ...]
+
+  """
+  def list_episodes do
+    Repo.all(Episode)
+  end
+
+  @doc """
+  Gets a single episode.
+
+  Raises `Ecto.NoResultsError` if the Episode does not exist.
+
+  ## Examples
+
+      iex> get_episode!(123)
+      %Episode{}
+
+      iex> get_episode!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_episode!(id), do: Repo.get!(Episode, id)
+
+  @doc """
+  Creates a episode.
+
+  ## Examples
+
+      iex> create_episode(%{field: value})
+      {:ok, %Episode{}}
+
+      iex> create_episode(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_episode(attrs \\ %{}) do
+    %Episode{}
+    |> Episode.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a episode.
+
+  ## Examples
+
+      iex> update_episode(episode, %{field: new_value})
+      {:ok, %Episode{}}
+
+      iex> update_episode(episode, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_episode(%Episode{} = episode, attrs) do
+    episode
+    |> Episode.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a episode.
+
+  ## Examples
+
+      iex> delete_episode(episode)
+      {:ok, %Episode{}}
+
+      iex> delete_episode(episode)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_episode(%Episode{} = episode) do
+    Repo.delete(episode)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking episode changes.
+
+  ## Examples
+
+      iex> change_episode(episode)
+      %Ecto.Changeset{data: %Episode{}}
+
+  """
+  def change_episode(%Episode{} = episode, attrs \\ %{}) do
+    Episode.changeset(episode, attrs)
+  end
+end

lib/radiator/podcast/episode.ex

@@ -0,0 +1,23 @@
+defmodule Radiator.Podcast.Episode do
+  @moduledoc """
+    Represents the Episode model.
+    TODO: Episodes should be numbered and ordered inside a show.
+  """
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  alias Radiator.Podcast.Show
+
+  schema "episodes" do
+    field :title, :string
+    belongs_to :show, Show
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(episode, attrs) do
+    episode
+    |> cast(attrs, [:title, :show_id])
+    |> validate_required([:title, :show_id])
+  end
+end

lib/radiator/podcast/network.ex

@@ -0,0 +1,24 @@
+defmodule Radiator.Podcast.Network do
+  @moduledoc """
+    Represents the network model.
+    A network can host many shows.
+  """
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  alias Radiator.Podcast.Show
+
+  schema "networks" do
+    field :title, :string
+
+    has_many(:shows, Show)
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(network, attrs) do
+    network
+    |> cast(attrs, [:title])
+    |> validate_required([:title])
+  end
+end

lib/radiator/podcast/show.ex

@@ -0,0 +1,23 @@
+defmodule Radiator.Podcast.Show do
+  @moduledoc """
+    Represents the show model.
+    A show can have many episodes.
+  """
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias Radiator.Podcast.{Episode, Network}
+
+  schema "shows" do
+    field :title, :string
+    belongs_to :network, Network
+    has_many(:episodes, Episode)
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(show, attrs) do
+    show
+    |> cast(attrs, [:title, :network_id])
+    |> validate_required([:title])
+  end
+end

priv/repo/migrations/20231124220144_create_networks.exs

@@ -0,0 +1,11 @@
+defmodule Radiator.Repo.Migrations.CreateNetworks do
+  use Ecto.Migration
+
+  def change do
+    create table(:networks) do
+      add :title, :string
+
+      timestamps(type: :utc_datetime)
+    end
+  end
+end

priv/repo/migrations/20231127182625_create_shows.exs

@@ -0,0 +1,14 @@
+defmodule Radiator.Repo.Migrations.CreateShows do
+  use Ecto.Migration
+
+  def change do
+    create table(:shows) do
+      add :title, :string
+      add :network_id, references(:networks, on_delete: :nothing)
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create index(:shows, [:network_id])
+  end
+end