add contexts

lib/memex/contexts.ex

@@ -0,0 +1,104 @@
+defmodule Memex.Contexts do
+  @moduledoc """
+  The Contexts context.
+  """
+
+  import Ecto.Query, warn: false
+  alias Memex.Repo
+
+  alias Memex.Contexts.Context
+
+  @doc """
+  Returns the list of contexts.
+
+  ## Examples
+
+      iex> list_contexts()
+      [%Context{}, ...]
+
+  """
+  def list_contexts do
+    Repo.all(Context)
+  end
+
+  @doc """
+  Gets a single context.
+
+  Raises `Ecto.NoResultsError` if the Context does not exist.
+
+  ## Examples
+
+      iex> get_context!(123)
+      %Context{}
+
+      iex> get_context!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_context!(id), do: Repo.get!(Context, id)
+
+  @doc """
+  Creates a context.
+
+  ## Examples
+
+      iex> create_context(%{field: value})
+      {:ok, %Context{}}
+
+      iex> create_context(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_context(attrs \\ %{}) do
+    %Context{}
+    |> Context.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a context.
+
+  ## Examples
+
+      iex> update_context(context, %{field: new_value})
+      {:ok, %Context{}}
+
+      iex> update_context(context, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_context(%Context{} = context, attrs) do
+    context
+    |> Context.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a context.
+
+  ## Examples
+
+      iex> delete_context(context)
+      {:ok, %Context{}}
+
+      iex> delete_context(context)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_context(%Context{} = context) do
+    Repo.delete(context)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking context changes.
+
+  ## Examples
+
+      iex> change_context(context)
+      %Ecto.Changeset{data: %Context{}}
+
+  """
+  def change_context(%Context{} = context, attrs \\ %{}) do
+    Context.changeset(context, attrs)
+  end
+end

lib/memex/contexts/context.ex

@@ -0,0 +1,22 @@
+defmodule Memex.Contexts.Context do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "contexts" do
+    field :content, :string
+    field :tag, {:array, :string}
+    field :title, :string
+    field :visibility, Ecto.Enum, values: [:public, :private, :unlisted]
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(context, attrs) do
+    context
+    |> cast(attrs, [:title, :content, :tag, :visibility])
+    |> validate_required([:title, :content, :tag, :visibility])
+  end
+end

lib/memex_web/live/context_live/form_component.ex

@@ -0,0 +1,55 @@
+defmodule MemexWeb.ContextLive.FormComponent do
+  use MemexWeb, :live_component
+
+  alias Memex.Contexts
+
+  @impl true
+  def update(%{context: context} = assigns, socket) do
+    changeset = Contexts.change_context(context)
+
+    {:ok,
+     socket
+     |> assign(assigns)
+     |> assign(:changeset, changeset)}
+  end
+
+  @impl true
+  def handle_event("validate", %{"context" => context_params}, socket) do
+    changeset =
+      socket.assigns.context
+      |> Contexts.change_context(context_params)
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign(socket, :changeset, changeset)}
+  end
+
+  def handle_event("save", %{"context" => context_params}, socket) do
+    save_context(socket, socket.assigns.action, context_params)
+  end
+
+  defp save_context(socket, :edit, context_params) do
+    case Contexts.update_context(socket.assigns.context, context_params) do
+      {:ok, _context} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, "Context updated successfully")
+         |> push_redirect(to: socket.assigns.return_to)}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, :changeset, changeset)}
+    end
+  end
+
+  defp save_context(socket, :new, context_params) do
+    case Contexts.create_context(context_params) do
+      {:ok, _context} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, "Context created successfully")
+         |> push_redirect(to: socket.assigns.return_to)}
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        {:noreply, assign(socket, changeset: changeset)}
+    end
+  end
+end

lib/memex_web/live/context_live/form_component.html.heex

@@ -0,0 +1,32 @@
+<div>
+  <h2><%= @title %></h2>
+
+  <.form
+    let={f}
+    for={@changeset}
+    id="context-form"
+    phx-target={@myself}
+    phx-change="validate"
+    phx-submit="save">
+  
+    <%= label f, :title %>
+    <%= text_input f, :title %>
+    <%= error_tag f, :title %>
+  
+    <%= label f, :content %>
+    <%= textarea f, :content %>
+    <%= error_tag f, :content %>
+  
+    <%= label f, :tag %>
+    <%= multiple_select f, :tag, ["Option 1": "option1", "Option 2": "option2"] %>
+    <%= error_tag f, :tag %>
+  
+    <%= label f, :visibility %>
+    <%= select f, :visibility, Ecto.Enum.values(Memex.Contexts.Context, :visibility), prompt: "Choose a value" %>
+    <%= error_tag f, :visibility %>
+  
+    <div>
+      <%= submit "Save", phx_disable_with: "Saving..." %>
+    </div>
+  </.form>
+</div>

lib/memex_web/live/context_live/index.ex

@@ -0,0 +1,46 @@
+defmodule MemexWeb.ContextLive.Index do
+  use MemexWeb, :live_view
+
+  alias Memex.Contexts
+  alias Memex.Contexts.Context
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok, assign(socket, :contexts, list_contexts())}
+  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 Context")
+    |> assign(:context, Contexts.get_context!(id))
+  end
+
+  defp apply_action(socket, :new, _params) do
+    socket
+    |> assign(:page_title, "New Context")
+    |> assign(:context, %Context{})
+  end
+
+  defp apply_action(socket, :index, _params) do
+    socket
+    |> assign(:page_title, "Listing Contexts")
+    |> assign(:context, nil)
+  end
+
+  @impl true
+  def handle_event("delete", %{"id" => id}, socket) do
+    context = Contexts.get_context!(id)
+    {:ok, _} = Contexts.delete_context(context)
+
+    {:noreply, assign(socket, :contexts, list_contexts())}
+  end
+
+  defp list_contexts do
+    Contexts.list_contexts()
+  end
+end

lib/memex_web/live/context_live/index.html.heex

@@ -0,0 +1,45 @@
+<h1>Listing Contexts</h1>
+
+<%= if @live_action in [:new, :edit] do %>
+  <.modal return_to={Routes.context_index_path(@socket, :index)}>
+    <.live_component
+      module={MemexWeb.ContextLive.FormComponent}
+      id={@context.id || :new}
+      title={@page_title}
+      action={@live_action}
+      context={@context}
+      return_to={Routes.context_index_path(@socket, :index)}
+    />
+  </.modal>
+<% end %>
+
+<table>
+  <thead>
+    <tr>
+      <th>Title</th>
+      <th>Content</th>
+      <th>Tag</th>
+      <th>Visibility</th>
+
+      <th></th>
+    </tr>
+  </thead>
+  <tbody id="contexts">
+    <%= for context <- @contexts do %>
+      <tr id={"context-#{context.id}"}>
+        <td><%= context.title %></td>
+        <td><%= context.content %></td>
+        <td><%= context.tag %></td>
+        <td><%= context.visibility %></td>
+
+        <td>
+          <span><%= live_redirect "Show", to: Routes.context_show_path(@socket, :show, context) %></span>
+          <span><%= live_patch "Edit", to: Routes.context_index_path(@socket, :edit, context) %></span>
+          <span><%= link "Delete", to: "#", phx_click: "delete", phx_value_id: context.id, data: [confirm: "Are you sure?"] %></span>
+        </td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<span><%= live_patch "New Context", to: Routes.context_index_path(@socket, :new) %></span>

lib/memex_web/live/context_live/show.ex

@@ -0,0 +1,21 @@
+defmodule MemexWeb.ContextLive.Show do
+  use MemexWeb, :live_view
+
+  alias Memex.Contexts
+
+  @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(:context, Contexts.get_context!(id))}
+  end
+
+  defp page_title(:show), do: "Show Context"
+  defp page_title(:edit), do: "Edit Context"
+end

lib/memex_web/live/context_live/show.html.heex

@@ -0,0 +1,41 @@
+<h1>Show Context</h1>
+
+<%= if @live_action in [:edit] do %>
+  <.modal return_to={Routes.context_show_path(@socket, :show, @context)}>
+    <.live_component
+      module={MemexWeb.ContextLive.FormComponent}
+      id={@context.id}
+      title={@page_title}
+      action={@live_action}
+      context={@context}
+      return_to={Routes.context_show_path(@socket, :show, @context)}
+    />
+  </.modal>
+<% end %>
+
+<ul>
+
+  <li>
+    <strong>Title:</strong>
+    <%= @context.title %>
+  </li>
+
+  <li>
+    <strong>Content:</strong>
+    <%= @context.content %>
+  </li>
+
+  <li>
+    <strong>Tag:</strong>
+    <%= @context.tag %>
+  </li>
+
+  <li>
+    <strong>Visibility:</strong>
+    <%= @context.visibility %>
+  </li>
+
+</ul>
+
+<span><%= live_patch "Edit", to: Routes.context_show_path(@socket, :edit, @context), class: "button" %></span> |
+<span><%= live_redirect "Back", to: Routes.context_index_path(@socket, :index) %></span>

lib/memex_web/router.ex

@@ -59,6 +59,10 @@ defmodule MemexWeb.Router do
 
       live "/notes", NoteLive.Index, :index
       live "/notes/:id", NoteLive.Show, :show
+
+      live "/contexts", ContextLive.Index, :index
+      live "/contexts/:id", ContextLive.Show, :show
+
     end
 
     scope "/", MemexWeb do
@@ -68,6 +72,10 @@ defmodule MemexWeb.Router do
       live "/notes/:id/edit", NoteLive.Index, :edit
       live "/notes/:id/show/edit", NoteLive.Show, :edit
 
+      live "/contexts/new", ContextLive.Index, :new
+      live "/contexts/:id/edit", ContextLive.Index, :edit
+      live "/contexts/:id/show/edit", ContextLive.Show, :edit
+
       get "/users/settings", UserSettingsController, :edit
       put "/users/settings", UserSettingsController, :update
       delete "/users/settings/:id", UserSettingsController, :delete