After 'mix phx.gen.live Items Item items name:string description:string info:string amount:integer factor:float type:string'

lib/generic_rest_server/items.ex

@@ -0,0 +1,147 @@
+defmodule GenericRestServer.Items do
+  @moduledoc """
+  The Items context.
+  """
+
+  import Ecto.Query, warn: false
+  alias GenericRestServer.Repo
+
+  alias GenericRestServer.Items.Item
+  alias GenericRestServer.Accounts.Scope
+
+  @doc """
+  Subscribes to scoped notifications about any item changes.
+
+  The broadcasted messages match the pattern:
+
+    * {:created, %Item{}}
+    * {:updated, %Item{}}
+    * {:deleted, %Item{}}
+
+  """
+  def subscribe_items(%Scope{} = scope) do
+    key = scope.user.id
+
+    Phoenix.PubSub.subscribe(GenericRestServer.PubSub, "user:#{key}:items")
+  end
+
+  defp broadcast_item(%Scope{} = scope, message) do
+    key = scope.user.id
+
+    Phoenix.PubSub.broadcast(GenericRestServer.PubSub, "user:#{key}:items", message)
+  end
+
+  @doc """
+  Returns the list of items.
+
+  ## Examples
+
+      iex> list_items(scope)
+      [%Item{}, ...]
+
+  """
+  def list_items(%Scope{} = scope) do
+    Repo.all_by(Item, user_id: scope.user.id)
+  end
+
+  @doc """
+  Gets a single item.
+
+  Raises `Ecto.NoResultsError` if the Item does not exist.
+
+  ## Examples
+
+      iex> get_item!(scope, 123)
+      %Item{}
+
+      iex> get_item!(scope, 456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_item!(%Scope{} = scope, id) do
+    Repo.get_by!(Item, id: id, user_id: scope.user.id)
+  end
+
+  @doc """
+  Creates a item.
+
+  ## Examples
+
+      iex> create_item(scope, %{field: value})
+      {:ok, %Item{}}
+
+      iex> create_item(scope, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_item(%Scope{} = scope, attrs) do
+    with {:ok, item = %Item{}} <-
+           %Item{}
+           |> Item.changeset(attrs, scope)
+           |> Repo.insert() do
+      broadcast_item(scope, {:created, item})
+      {:ok, item}
+    end
+  end
+
+  @doc """
+  Updates a item.
+
+  ## Examples
+
+      iex> update_item(scope, item, %{field: new_value})
+      {:ok, %Item{}}
+
+      iex> update_item(scope, item, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_item(%Scope{} = scope, %Item{} = item, attrs) do
+    true = item.user_id == scope.user.id
+
+    with {:ok, item = %Item{}} <-
+           item
+           |> Item.changeset(attrs, scope)
+           |> Repo.update() do
+      broadcast_item(scope, {:updated, item})
+      {:ok, item}
+    end
+  end
+
+  @doc """
+  Deletes a item.
+
+  ## Examples
+
+      iex> delete_item(scope, item)
+      {:ok, %Item{}}
+
+      iex> delete_item(scope, item)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_item(%Scope{} = scope, %Item{} = item) do
+    true = item.user_id == scope.user.id
+
+    with {:ok, item = %Item{}} <-
+           Repo.delete(item) do
+      broadcast_item(scope, {:deleted, item})
+      {:ok, item}
+    end
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking item changes.
+
+  ## Examples
+
+      iex> change_item(scope, item)
+      %Ecto.Changeset{data: %Item{}}
+
+  """
+  def change_item(%Scope{} = scope, %Item{} = item, attrs \\ %{}) do
+    true = item.user_id == scope.user.id
+
+    Item.changeset(item, attrs, scope)
+  end
+end

lib/generic_rest_server/items/item.ex

@@ -0,0 +1,26 @@
+defmodule GenericRestServer.Items.Item do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "items" do
+    field :name, :string
+    field :description, :string
+    field :info, :string
+    field :amount, :integer
+    field :factor, :float
+    field :type, :string
+    field :user_id, :binary_id
+
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(item, attrs, user_scope) do
+    item
+    |> cast(attrs, [:name, :description, :info, :amount, :factor, :type])
+    |> validate_required([:name, :description, :info, :amount, :factor, :type])
+    |> put_change(:user_id, user_scope.user.id)
+  end
+end

lib/generic_rest_server_web/live/item_live/form.ex

@@ -0,0 +1,103 @@
+defmodule GenericRestServerWeb.ItemLive.Form do
+  use GenericRestServerWeb, :live_view
+
+  alias GenericRestServer.Items
+  alias GenericRestServer.Items.Item
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_scope={@current_scope}>
+      <.header>
+        {@page_title}
+        <:subtitle>Use this form to manage item records in your database.</:subtitle>
+      </.header>
+
+      <.form for={@form} id="item-form" phx-change="validate" phx-submit="save">
+        <.input field={@form[:name]} type="text" label="Name" />
+        <.input field={@form[:description]} type="text" label="Description" />
+        <.input field={@form[:info]} type="text" label="Info" />
+        <.input field={@form[:amount]} type="number" label="Amount" />
+        <.input field={@form[:factor]} type="number" label="Factor" step="any" />
+        <.input field={@form[:type]} type="text" label="Type" />
+        <footer>
+          <.button phx-disable-with="Saving..." variant="primary">Save Item</.button>
+          <.button navigate={return_path(@current_scope, @return_to, @item)}>Cancel</.button>
+        </footer>
+      </.form>
+    </Layouts.app>
+    """
+  end
+
+  @impl true
+  def mount(params, _session, socket) do
+    {:ok,
+     socket
+     |> assign(:return_to, return_to(params["return_to"]))
+     |> apply_action(socket.assigns.live_action, params)}
+  end
+
+  defp return_to("show"), do: "show"
+  defp return_to(_), do: "index"
+
+  defp apply_action(socket, :edit, %{"id" => id}) do
+    item = Items.get_item!(socket.assigns.current_scope, id)
+
+    socket
+    |> assign(:page_title, "Edit Item")
+    |> assign(:item, item)
+    |> assign(:form, to_form(Items.change_item(socket.assigns.current_scope, item)))
+  end
+
+  defp apply_action(socket, :new, _params) do
+    item = %Item{user_id: socket.assigns.current_scope.user.id}
+
+    socket
+    |> assign(:page_title, "New Item")
+    |> assign(:item, item)
+    |> assign(:form, to_form(Items.change_item(socket.assigns.current_scope, item)))
+  end
+
+  @impl true
+  def handle_event("validate", %{"item" => item_params}, socket) do
+    changeset = Items.change_item(socket.assigns.current_scope, socket.assigns.item, item_params)
+    {:noreply, assign(socket, form: to_form(changeset, action: :validate))}
+  end
+
+  def handle_event("save", %{"item" => item_params}, socket) do
+    save_item(socket, socket.assigns.live_action, item_params)
+  end
+
+  defp save_item(socket, :edit, item_params) do
+    case Items.update_item(socket.assigns.current_scope, socket.assigns.item, item_params) do
+      {:ok, item} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, "Item updated successfully")
+         |> push_navigate(
+           to: return_path(socket.assigns.current_scope, socket.assigns.return_to, item)
+         )}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, form: to_form(changeset))}
+    end
+  end
+
+  defp save_item(socket, :new, item_params) do
+    case Items.create_item(socket.assigns.current_scope, item_params) do
+      {:ok, item} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, "Item created successfully")
+         |> push_navigate(
+           to: return_path(socket.assigns.current_scope, socket.assigns.return_to, item)
+         )}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, form: to_form(changeset))}
+    end
+  end
+
+  defp return_path(_scope, "index", _item), do: ~p"/items"
+  defp return_path(_scope, "show", item), do: ~p"/items/#{item}"
+end

lib/generic_rest_server_web/live/item_live/index.ex

@@ -0,0 +1,78 @@
+defmodule GenericRestServerWeb.ItemLive.Index do
+  use GenericRestServerWeb, :live_view
+
+  alias GenericRestServer.Items
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_scope={@current_scope}>
+      <.header>
+        Listing Items
+        <:actions>
+          <.button variant="primary" navigate={~p"/items/new"}>
+            <.icon name="hero-plus" /> New Item
+          </.button>
+        </:actions>
+      </.header>
+
+      <.table
+        id="items"
+        rows={@streams.items}
+        row_click={fn {_id, item} -> JS.navigate(~p"/items/#{item}") end}
+      >
+        <:col :let={{_id, item}} label="Name">{item.name}</:col>
+        <:col :let={{_id, item}} label="Description">{item.description}</:col>
+        <:col :let={{_id, item}} label="Info">{item.info}</:col>
+        <:col :let={{_id, item}} label="Amount">{item.amount}</:col>
+        <:col :let={{_id, item}} label="Factor">{item.factor}</:col>
+        <:col :let={{_id, item}} label="Type">{item.type}</:col>
+        <:action :let={{_id, item}}>
+          <div class="sr-only">
+            <.link navigate={~p"/items/#{item}"}>Show</.link>
+          </div>
+          <.link navigate={~p"/items/#{item}/edit"}>Edit</.link>
+        </:action>
+        <:action :let={{id, item}}>
+          <.link
+            phx-click={JS.push("delete", value: %{id: item.id}) |> hide("##{id}")}
+            data-confirm="Are you sure?"
+          >
+            Delete
+          </.link>
+        </:action>
+      </.table>
+    </Layouts.app>
+    """
+  end
+
+  @impl true
+  def mount(_params, _session, socket) do
+    if connected?(socket) do
+      Items.subscribe_items(socket.assigns.current_scope)
+    end
+
+    {:ok,
+     socket
+     |> assign(:page_title, "Listing Items")
+     |> stream(:items, list_items(socket.assigns.current_scope))}
+  end
+
+  @impl true
+  def handle_event("delete", %{"id" => id}, socket) do
+    item = Items.get_item!(socket.assigns.current_scope, id)
+    {:ok, _} = Items.delete_item(socket.assigns.current_scope, item)
+
+    {:noreply, stream_delete(socket, :items, item)}
+  end
+
+  @impl true
+  def handle_info({type, %GenericRestServer.Items.Item{}}, socket)
+      when type in [:created, :updated, :deleted] do
+    {:noreply, stream(socket, :items, list_items(socket.assigns.current_scope), reset: true)}
+  end
+
+  defp list_items(current_scope) do
+    Items.list_items(current_scope)
+  end
+end

lib/generic_rest_server_web/live/item_live/show.ex

@@ -0,0 +1,69 @@
+defmodule GenericRestServerWeb.ItemLive.Show do
+  use GenericRestServerWeb, :live_view
+
+  alias GenericRestServer.Items
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_scope={@current_scope}>
+      <.header>
+        Item {@item.id}
+        <:subtitle>This is a item record from your database.</:subtitle>
+        <:actions>
+          <.button navigate={~p"/items"}>
+            <.icon name="hero-arrow-left" />
+          </.button>
+          <.button variant="primary" navigate={~p"/items/#{@item}/edit?return_to=show"}>
+            <.icon name="hero-pencil-square" /> Edit item
+          </.button>
+        </:actions>
+      </.header>
+
+      <.list>
+        <:item title="Name">{@item.name}</:item>
+        <:item title="Description">{@item.description}</:item>
+        <:item title="Info">{@item.info}</:item>
+        <:item title="Amount">{@item.amount}</:item>
+        <:item title="Factor">{@item.factor}</:item>
+        <:item title="Type">{@item.type}</:item>
+      </.list>
+    </Layouts.app>
+    """
+  end
+
+  @impl true
+  def mount(%{"id" => id}, _session, socket) do
+    if connected?(socket) do
+      Items.subscribe_items(socket.assigns.current_scope)
+    end
+
+    {:ok,
+     socket
+     |> assign(:page_title, "Show Item")
+     |> assign(:item, Items.get_item!(socket.assigns.current_scope, id))}
+  end
+
+  @impl true
+  def handle_info(
+        {:updated, %GenericRestServer.Items.Item{id: id} = item},
+        %{assigns: %{item: %{id: id}}} = socket
+      ) do
+    {:noreply, assign(socket, :item, item)}
+  end
+
+  def handle_info(
+        {:deleted, %GenericRestServer.Items.Item{id: id}},
+        %{assigns: %{item: %{id: id}}} = socket
+      ) do
+    {:noreply,
+     socket
+     |> put_flash(:error, "The current item was deleted.")
+     |> push_navigate(to: ~p"/items")}
+  end
+
+  def handle_info({type, %GenericRestServer.Items.Item{}}, socket)
+      when type in [:created, :updated, :deleted] do
+    {:noreply, socket}
+  end
+end

lib/generic_rest_server_web/router.ex

@@ -54,6 +54,11 @@ defmodule GenericRestServerWeb.Router do
       on_mount: [{GenericRestServerWeb.UserAuth, :require_authenticated}] do
       live "/users/settings", UserLive.Settings, :edit
       live "/users/settings/confirm-email/:token", UserLive.Settings, :confirm_email
+
+      live "/items", ItemLive.Index, :index
+      live "/items/new", ItemLive.Form, :new
+      live "/items/:id", ItemLive.Show, :show
+      live "/items/:id/edit", ItemLive.Form, :edit
     end
 
     post "/users/update-password", UserSessionController, :update_password