Generate schema and live_view scaffold for records

1. Records are not yet tied to artists
2. The generated edit route, along with related functionality, may be
   deleted as I don't think it's gonna be needed. Leaving it included in
   the commit for reference.

lib/music_library/records.ex

@@ -0,0 +1,104 @@
+defmodule MusicLibrary.Records do
+  @moduledoc """
+  The Records context.
+  """
+
+  import Ecto.Query, warn: false
+  alias MusicLibrary.Repo
+
+  alias MusicLibrary.Records.Record
+
+  @doc """
+  Returns the list of records.
+
+  ## Examples
+
+      iex> list_records()
+      [%Record{}, ...]
+
+  """
+  def list_records do
+    Repo.all(Record)
+  end
+
+  @doc """
+  Gets a single record.
+
+  Raises `Ecto.NoResultsError` if the Record does not exist.
+
+  ## Examples
+
+      iex> get_record!(123)
+      %Record{}
+
+      iex> get_record!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_record!(id), do: Repo.get!(Record, id)
+
+  @doc """
+  Creates a record.
+
+  ## Examples
+
+      iex> create_record(%{field: value})
+      {:ok, %Record{}}
+
+      iex> create_record(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_record(attrs \\ %{}) do
+    %Record{}
+    |> Record.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a record.
+
+  ## Examples
+
+      iex> update_record(record, %{field: new_value})
+      {:ok, %Record{}}
+
+      iex> update_record(record, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_record(%Record{} = record, attrs) do
+    record
+    |> Record.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a record.
+
+  ## Examples
+
+      iex> delete_record(record)
+      {:ok, %Record{}}
+
+      iex> delete_record(record)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_record(%Record{} = record) do
+    Repo.delete(record)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking record changes.
+
+  ## Examples
+
+      iex> change_record(record)
+      %Ecto.Changeset{data: %Record{}}
+
+  """
+  def change_record(%Record{} = record, attrs \\ %{}) do
+    Record.changeset(record, attrs)
+  end
+end

lib/music_library/records/record.ex

@@ -0,0 +1,24 @@
+defmodule MusicLibrary.Records.Record do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "records" do
+    field :type, Ecto.Enum, values: [:album, :ep, :live, :compilation, :single, :other]
+    field :title, :string
+    field :image, :string
+    field :year, :integer
+    field :musicbrainz_id, Ecto.UUID
+    field :genres, {:array, :string}
+
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(record, attrs) do
+    record
+    |> cast(attrs, [:type, :title, :musicbrainz_id, :year, :genres, :image])
+    |> validate_required([:type, :title, :musicbrainz_id, :year, :genres, :image])
+  end
+end

lib/music_library_web/live/record_live/form_component.ex

@@ -0,0 +1,99 @@
+defmodule MusicLibraryWeb.RecordLive.FormComponent do
+  use MusicLibraryWeb, :live_component
+
+  alias MusicLibrary.Records
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <div>
+      <.header>
+        <%= @title %>
+        <:subtitle>Use this form to manage record records in your database.</:subtitle>
+      </.header>
+
+      <.simple_form
+        for={@form}
+        id="record-form"
+        phx-target={@myself}
+        phx-change="validate"
+        phx-submit="save"
+      >
+        <.input
+          field={@form[:type]}
+          type="select"
+          label="Type"
+          prompt="Choose a value"
+          options={Ecto.Enum.values(MusicLibrary.Records.Record, :type)}
+        />
+        <.input field={@form[:title]} type="text" label="Title" />
+        <.input field={@form[:musicbrainz_id]} type="text" label="Musicbrainz" />
+        <.input field={@form[:year]} type="number" label="Year" />
+        <.input
+          field={@form[:genres]}
+          type="select"
+          multiple
+          label="Genres"
+          options={[{"Option 1", "option1"}, {"Option 2", "option2"}]}
+        />
+        <.input field={@form[:image]} type="text" label="Image" />
+        <:actions>
+          <.button phx-disable-with="Saving...">Save Record</.button>
+        </:actions>
+      </.simple_form>
+    </div>
+    """
+  end
+
+  @impl true
+  def update(%{record: record} = assigns, socket) do
+    {:ok,
+     socket
+     |> assign(assigns)
+     |> assign_new(:form, fn ->
+       to_form(Records.change_record(record))
+     end)}
+  end
+
+  @impl true
+  def handle_event("validate", %{"record" => record_params}, socket) do
+    changeset = Records.change_record(socket.assigns.record, record_params)
+    {:noreply, assign(socket, form: to_form(changeset, action: :validate))}
+  end
+
+  def handle_event("save", %{"record" => record_params}, socket) do
+    save_record(socket, socket.assigns.action, record_params)
+  end
+
+  defp save_record(socket, :edit, record_params) do
+    case Records.update_record(socket.assigns.record, record_params) do
+      {:ok, record} ->
+        notify_parent({:saved, record})
+
+        {:noreply,
+         socket
+         |> put_flash(:info, "Record updated successfully")
+         |> push_patch(to: socket.assigns.patch)}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, form: to_form(changeset))}
+    end
+  end
+
+  defp save_record(socket, :new, record_params) do
+    case Records.create_record(record_params) do
+      {:ok, record} ->
+        notify_parent({:saved, record})
+
+        {:noreply,
+         socket
+         |> put_flash(:info, "Record created successfully")
+         |> push_patch(to: socket.assigns.patch)}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, form: to_form(changeset))}
+    end
+  end
+
+  defp notify_parent(msg), do: send(self(), {__MODULE__, msg})
+end

lib/music_library_web/live/record_live/index.ex

@@ -0,0 +1,47 @@
+defmodule MusicLibraryWeb.RecordLive.Index do
+  use MusicLibraryWeb, :live_view
+
+  alias MusicLibrary.Records
+  alias MusicLibrary.Records.Record
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok, stream(socket, :records, Records.list_records())}
+  end
+
+  @impl true
+  def handle_params(params, _url, socket) do
+    {:noreply, apply_action(socket, socket.assigns.live_action, params)}
+  end
+
+  defp apply_action(socket, :edit, %{"id" => id}) do
+    socket
+    |> assign(:page_title, "Edit Record")
+    |> assign(:record, Records.get_record!(id))
+  end
+
+  defp apply_action(socket, :new, _params) do
+    socket
+    |> assign(:page_title, "New Record")
+    |> assign(:record, %Record{})
+  end
+
+  defp apply_action(socket, :index, _params) do
+    socket
+    |> assign(:page_title, "Listing Records")
+    |> assign(:record, nil)
+  end
+
+  @impl true
+  def handle_info({MusicLibraryWeb.RecordLive.FormComponent, {:saved, record}}, socket) do
+    {:noreply, stream_insert(socket, :records, record)}
+  end
+
+  @impl true
+  def handle_event("delete", %{"id" => id}, socket) do
+    record = Records.get_record!(id)
+    {:ok, _} = Records.delete_record(record)
+
+    {:noreply, stream_delete(socket, :records, record)}
+  end
+end

lib/music_library_web/live/record_live/index.html.heex

@@ -0,0 +1,46 @@
+<.header>
+  Listing Records
+  <:actions>
+    <.link patch={~p"/records/new"}>
+      <.button>New Record</.button>
+    </.link>
+  </:actions>
+</.header>
+
+<.table
+  id="records"
+  rows={@streams.records}
+  row_click={fn {_id, record} -> JS.navigate(~p"/records/#{record}") end}
+>
+  <:col :let={{_id, record}} label="Type"><%= record.type %></:col>
+  <:col :let={{_id, record}} label="Title"><%= record.title %></:col>
+  <:col :let={{_id, record}} label="Musicbrainz"><%= record.musicbrainz_id %></:col>
+  <:col :let={{_id, record}} label="Year"><%= record.year %></:col>
+  <:col :let={{_id, record}} label="Genres"><%= record.genres %></:col>
+  <:col :let={{_id, record}} label="Image"><%= record.image %></:col>
+  <:action :let={{_id, record}}>
+    <div class="sr-only">
+      <.link navigate={~p"/records/#{record}"}>Show</.link>
+    </div>
+    <.link patch={~p"/records/#{record}/edit"}>Edit</.link>
+  </:action>
+  <:action :let={{id, record}}>
+    <.link
+      phx-click={JS.push("delete", value: %{id: record.id}) |> hide("##{id}")}
+      data-confirm="Are you sure?"
+    >
+      Delete
+    </.link>
+  </:action>
+</.table>
+
+<.modal :if={@live_action in [:new, :edit]} id="record-modal" show on_cancel={JS.patch(~p"/records")}>
+  <.live_component
+    module={MusicLibraryWeb.RecordLive.FormComponent}
+    id={@record.id || :new}
+    title={@page_title}
+    action={@live_action}
+    record={@record}
+    patch={~p"/records"}
+  />
+</.modal>

lib/music_library_web/live/record_live/show.ex

@@ -0,0 +1,21 @@
+defmodule MusicLibraryWeb.RecordLive.Show do
+  use MusicLibraryWeb, :live_view
+
+  alias MusicLibrary.Records
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok, socket}
+  end
+
+  @impl true
+  def handle_params(%{"id" => id}, _, socket) do
+    {:noreply,
+     socket
+     |> assign(:page_title, page_title(socket.assigns.live_action))
+     |> assign(:record, Records.get_record!(id))}
+  end
+
+  defp page_title(:show), do: "Show Record"
+  defp page_title(:edit), do: "Edit Record"
+end

lib/music_library_web/live/record_live/show.html.heex

@@ -0,0 +1,31 @@
+<.header>
+  Record <%= @record.id %>
+  <:subtitle>This is a record record from your database.</:subtitle>
+  <:actions>
+    <.link patch={~p"/records/#{@record}/show/edit"} phx-click={JS.push_focus()}>
+      <.button>Edit record</.button>
+    </.link>
+  </:actions>
+</.header>
+
+<.list>
+  <:item title="Type"><%= @record.type %></:item>
+  <:item title="Title"><%= @record.title %></:item>
+  <:item title="Musicbrainz"><%= @record.musicbrainz_id %></:item>
+  <:item title="Year"><%= @record.year %></:item>
+  <:item title="Genres"><%= @record.genres %></:item>
+  <:item title="Image"><%= @record.image %></:item>
+</.list>
+
+<.back navigate={~p"/records"}>Back to records</.back>
+
+<.modal :if={@live_action == :edit} id="record-modal" show on_cancel={JS.patch(~p"/records/#{@record}")}>
+  <.live_component
+    module={MusicLibraryWeb.RecordLive.FormComponent}
+    id={@record.id}
+    title={@page_title}
+    action={@live_action}
+    record={@record}
+    patch={~p"/records/#{@record}"}
+  />
+</.modal>

lib/music_library_web/router.ex

@@ -18,6 +18,13 @@ defmodule MusicLibraryWeb.Router do
     pipe_through :browser
 
     get "/", PageController, :home
+
+    live "/records", RecordLive.Index, :index
+    live "/records/new", RecordLive.Index, :new
+    live "/records/:id/edit", RecordLive.Index, :edit
+
+    live "/records/:id", RecordLive.Show, :show
+    live "/records/:id/show/edit", RecordLive.Show, :edit
   end
 
   # Other scopes may use custom stacks.