Add password changing

lib/frenzy/user.ex

@@ -29,17 +29,29 @@ defmodule Frenzy.User do
     |> validate_length(:password, min: 8)
     |> validate_length(:fever_password, min: 8)
     |> put_password_hash()
+    |> put_fever_token()
+  end
+
+  def change_password_changeset(user, attrs) do
+    user
+    |> cast(attrs, [:password])
+    |> validate_length(:password, min: 8)
+    |> put_password_hash()
   end
 
   defp put_password_hash(
+         %Ecto.Changeset{valid?: true, changes: %{password: password}} = changeset
+       ) do
+    change(changeset, Bcrypt.add_hash(password))
+  end
+
+  defp put_fever_token(
          %Ecto.Changeset{
            valid?: true,
-           changes: %{username: username, password: password, fever_password: fever_password}
+           changes: %{username: username, fever_password: fever_password}
          } = changeset
        ) do
-    changeset
-    |> change(Bcrypt.add_hash(password))
-    |> change(%{
+    change(changeset, %{
       fever_auth_token:
         :crypto.hash(:md5, "#{username}:#{fever_password}") |> Base.encode16(case: :lower)
     })

lib/frenzy_web/controllers/account_controller.ex

@@ -0,0 +1,59 @@
+defmodule FrenzyWeb.AccountController do
+  use FrenzyWeb, :controller
+  alias Frenzy.{Repo, User}
+  alias FrenzyWeb.Router.Helpers, as: Routes
+  alias FrenzyWeb.Endpoint
+
+  def show(conn, _params) do
+    user = conn.assigns[:user]
+
+    render(conn, "show.html", %{
+      user: user
+    })
+  end
+
+  def change_password(conn, _params) do
+    render(conn, "change_password.html")
+  end
+
+  def do_change_password(conn, %{
+        "old_password" => old,
+        "new_password" => new,
+        "confirm_new_password" => confirm
+      }) do
+    user = conn.assigns[:user] |> Repo.preload([:approved_clients, :groups])
+
+    case Bcrypt.check_pass(user, old) do
+      {:ok, user} ->
+        case new do
+          ^old ->
+            conn
+            |> put_flash(:error, "New password cannot be the same as old password.")
+            |> redirect(to: Routes.account_path(Endpoint, :change_password))
+
+          ^confirm ->
+            changeset = User.change_password_changeset(user, %{password: new})
+
+            {:ok, user} = Repo.update(changeset)
+
+            conn
+            |> put_flash(:info, "Password changed.")
+            |> redirect(to: Routes.account_path(Endpoint, :show))
+
+          _ ->
+            conn
+            |> put_flash(:error, "New password and confirmation did not match.")
+            |> redirect(to: Routes.account_path(Endpoint, :change_password))
+        end
+
+      {:error, _reason} ->
+        conn
+        |> put_flash(:error, "Invalid old password.")
+        |> redirect(to: Routes.account_path(Endpoint, :change_password))
+    end
+  end
+
+  def do_change_password(conn, _params) do
+    redirect(conn, to: Routes.account_path(Endpoint, :change_password))
+  end
+end

lib/frenzy_web/router.ex

@@ -35,6 +35,10 @@ defmodule FrenzyWeb.Router do
     pipe_through :browser
     pipe_through :browser_authenticate
 
+    get "/account", AccountController, :show
+    get "/account/change_password", AccountController, :change_password
+    post "/account/change_password", AccountController, :do_change_password
+
     get "/", GroupController, :index
     resources "/groups", GroupController, except: [:edit, :update]
 

lib/frenzy_web/templates/account/change_password.html.eex

@@ -0,0 +1,19 @@
+<h2>Change Password</h2>
+
+<%= form_tag Routes.account_path(@conn, :do_change_password), method: :post do %>
+  <div class="form-group">
+    <label for="old_password">Old Password</label>
+    <input type="password" name="old_password" id="old_password" minlength="8">
+  </div>
+  <div class="form-group">
+    <label for="new_password">New Password</label>
+    <input type="password" name="new_password" id="new_password" minlength="8">
+  </div>
+  <div class="form-group">
+    <label for="confirm_new_password">Confirm New Password</label>
+    <input type="password" name="confirm_new_password" id="confirm_new_password" minlength="8">
+  </div>
+  <div class="form-group">
+    <%= submit "Change Password" %>
+  </div>
+<% end %>

lib/frenzy_web/templates/account/show.html.eex

@@ -0,0 +1,4 @@
+<h1>User Settings</h1>
+<h2><%= @user.username %></h2>
+
+<a href="<%= Routes.account_path(@conn, :change_password) %>" class="button">Change Password</a>

lib/frenzy_web/views/account_view.ex

@@ -0,0 +1,3 @@
+defmodule FrenzyWeb.AccountView do
+  use FrenzyWeb, :view
+end