feat(pastes): implement editing for logged in users

Signed-off-by: SphericalKat <amolele@gmail.com>

lib/ketbin_web/controllers/page_controller.ex

@@ -15,16 +15,29 @@ defmodule KetbinWeb.PageController do
   def show(conn, %{"id" => id}) do
     paste = Pastes.get_paste!(id) # fetch paste from db
 
+    # pull off current user if exists
+    current_user = conn.assigns.current_user
+
+    # show edit if current user matches creator of paste
+    show_edit = current_user && current_user.id || false
+
     if paste.is_url do # paste is a url, redirect
       redirect(conn, external: paste.content)
     else # regular paste, show content
-      render(conn, "show.html", paste: paste)
+      render(conn, "show.html", paste: paste, show_edit: show_edit)
     end
   end
 
   def showlink(conn, %{"id" => id}) do
     paste = Pastes.get_paste!(id)
-    render(conn, "show.html", paste: paste)
+
+    # pull off current user if exists
+    current_user = conn.assigns.current_user
+
+    # show edit if current user matches creator of paste
+    show_edit = current_user && current_user.id || false
+
+    render(conn, "show.html", paste: paste, show_edit: show_edit)
   end
 
   def raw(conn, %{"id" => id}) do
@@ -48,7 +61,7 @@ defmodule KetbinWeb.PageController do
     paste_params =
       Map.put(paste_params, "id", id)
       |> Map.put("is_url", is_url)
-      |> Map.put("belongs_to", (if current_user, do: current_user.id, else: nil))
+      |> Map.put("belongs_to", current_user && current_user.id)
 
     # attempt to create a paste
     case Pastes.create_paste(paste_params) do
@@ -65,4 +78,24 @@ defmodule KetbinWeb.PageController do
         render(conn, "index.html", changeset: changeset)
     end
   end
+
+  def edit(conn, %{"id" => id}) do
+    paste = Pastes.get_paste!(id)
+    changeset = Pastes.change_paste(paste)
+    render(conn, "edit.html", paste: paste, changeset: changeset)
+  end
+
+  def update(conn, %{"id" => id, "paste" => paste_params}) do
+    paste = Pastes.get_paste!(id)
+
+    case Pastes.update_paste(paste, paste_params) do
+      {:ok, paste} ->
+        conn
+        |> put_flash(:info, "Paste updated successfully.")
+        |> redirect(to: Routes.page_path(conn, :show, paste))
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        render(conn, "edit.html", paste: paste, changeset: changeset)
+    end
+  end
 end

lib/ketbin_web/controllers/user_auth.ex

@@ -1,4 +1,5 @@
 defmodule KetbinWeb.UserAuth do
+  require Logger
   import Plug.Conn
   import Phoenix.Controller
 
@@ -94,6 +95,11 @@ defmodule KetbinWeb.UserAuth do
     assign(conn, :current_user, user)
   end
 
+  def owns_paste(%{assigns: %{current_user: user}} = conn, _params) do
+    Logger.info("USER: #{inspect(user)}")
+    conn
+  end
+
   defp ensure_user_token(conn) do
     if user_token = get_session(conn, :user_token) do
       {user_token, conn}

lib/ketbin_web/router.ex

@@ -17,13 +17,16 @@ defmodule KetbinWeb.Router do
   end
 
   scope "/", KetbinWeb do
-    pipe_through :browser
+    pipe_through [:browser, :owns_paste]
 
     get "/", PageController, :index
     get "/:id", PageController, :show
     get "/:id/raw", PageController, :raw
     get "/v/:id", PageController, :showlink
+    get "/edit/:id", PageController, :edit
     post "/", PageController, :create
+    patch "/:id", PageController, :update
+    put "/:id", PageController, :update
   end
 
   # Other scopes may use custom stacks.

lib/ketbin_web/templates/page/edit.html.leex

@@ -0,0 +1 @@
+<%= render "form.html", Map.put(assigns, :action, Routes.page_path(@conn, :update, @paste)) %>

lib/ketbin_web/templates/page/form.html.eex

@@ -7,15 +7,13 @@
 
     <div class="w-full h-full">
         <%= textarea f, :content, [class: "w-full h-full px-6 py-4 outline-none bg-light-grey font-bold resize-none", placeholder: "> Paste, save, share! (Pasting just a URL will shorten it!)"] %>
-        <div class="absolute top-0 right-0 p-4">
+        <div class="flex absolute top-0 right-0 p-4">
             <button type="submit">
                 <svg
 									class="h-6 w-6 cursor-pointer fill-current text-white hover:text-amber"
 									xmlns="http://www.w3.org/2000/svg"
-                        viewBox="0 0 24 24"
+									viewBox="0 0 24 24">
-                >
+                  <path d="M17.6 3.6c-.4-.4-.9-.6-1.4-.6H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V7.8c0-.5-.2-1-.6-1.4l-2.8-2.8zM12 19c-1.7 0-3-1.3-3-3s1.3-3 3-3 3 1.3 3 3-1.3 3-3 3zm1-10H7c-1.1 0-2-.9-2-2s.9-2 2-2h6c1.1 0 2 .9 2 2s-.9 2-2 2z"/>
-                    <path d="M17.6 3.6c-.4-.4-.9-.6-1.4-.6H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V7.8c0-.5-.2-1-.6-1.4l-2.8-2.8zM12 19c-1.7 0-3-1.3-3-3s1.3-3 3-3 3 1.3 3 3-1.3 3-3 3zm1-10H7c-1.1 0-2-.9-2-2s.9-2 2-2h6c1.1 0 2 .9 2 2s-.9 2-2 2z"
-                    />
                 </svg>
             </button>
         </div>

lib/ketbin_web/templates/page/show.html.eex

@@ -1,2 +1,12 @@
-
+<div class="flex relative flex-col w-full h-full">
+	<div class="flex absolute top-0 right-0 p-4 ">
+		<%= if @show_edit do%>
+			<a href="<%= Routes.page_path(@conn, :edit, @paste.id) %>" class="text-white hover:text-amber">
+			<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="h-6 w-6 cursor-pointer fill-current">
+				<path d="M3 17.46v3.04c0 .28.22.5.5.5h3.04c.13 0 .26-.05.35-.15L17.81 9.94l-3.75-3.75L3.15 17.1c-.1.1-.15.22-.15.36zM20.71 7.04a.996.996 0 0 0 0-1.41l-2.34-2.34a.996.996 0 0 0-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z"></path>
+			</svg>
+		</a>
+		<% end %>
+	</div>
 	<code class="break-word pl-2 h-full w-full nomarkdown overflow-y-auto"><%= @paste.content %></code>
+</div>