2026-02-28 23:25:28 +00:00
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defmodule BerrypodWeb.NewsletterController do
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use BerrypodWeb, :controller
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alias Berrypod.Newsletter
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2026-03-08 08:58:43 +00:00
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plug BerrypodWeb.Plugs.RateLimit, [type: :newsletter] when action == :subscribe
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2026-02-28 23:25:28 +00:00
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@doc "No-JS fallback for newsletter signup form."
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def subscribe(conn, %{"email" => email}) do
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ip_hash = hash_ip(conn)
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case Newsletter.subscribe(email,
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consent_text: "Newsletter signup on website",
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ip_hash: ip_hash
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) do
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{:ok, _} ->
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conn
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|> put_flash(:info, "Check your inbox to confirm your subscription.")
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|> redirect(to: redirect_back(conn))
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{:already_confirmed, _} ->
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conn
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|> put_flash(:info, "You're already subscribed!")
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|> redirect(to: redirect_back(conn))
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{:error, _} ->
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conn
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|> put_flash(:error, "Please enter a valid email address.")
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|> redirect(to: redirect_back(conn))
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end
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end
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def subscribe(conn, _params) do
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conn
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|> put_flash(:error, "Please enter your email address.")
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|> redirect(to: ~p"/")
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end
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@doc "Handles confirmation link from the double opt-in email."
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def confirm(conn, %{"token" => token}) do
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case Newsletter.confirm(token) do
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{:ok, _sub} ->
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conn
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|> put_status(200)
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|> html(confirmation_html(:success))
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{:error, :invalid_token} ->
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conn
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|> put_status(400)
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|> html(confirmation_html(:invalid))
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end
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end
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defp confirmation_html(:success) do
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shop_name = Berrypod.Settings.get_setting("shop_name", "Berrypod")
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"""
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Subscription confirmed</title>
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<style>body{font-family:system-ui,sans-serif;max-width:480px;margin:80px auto;padding:0 24px;color:#111}</style>
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</head>
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<body>
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<h1 style="font-size:1.25rem;margin-bottom:0.75rem">You're subscribed!</h1>
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<p style="color:#555">Thanks for confirming. You'll receive the #{shop_name} newsletter from now on.</p>
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<p style="margin-top:1.5rem"><a href="/" style="color:#111">Back to the shop</a></p>
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</body>
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</html>
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"""
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end
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defp confirmation_html(:invalid) do
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"""
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Invalid link</title>
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<style>body{font-family:system-ui,sans-serif;max-width:480px;margin:80px auto;padding:0 24px;color:#111}</style>
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</head>
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<body>
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<h1 style="font-size:1.25rem;margin-bottom:0.75rem">Link invalid or expired</h1>
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<p style="color:#555">This confirmation link has expired or is invalid. Please try subscribing again.</p>
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<p style="margin-top:1.5rem"><a href="/" style="color:#111">Back to the shop</a></p>
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</body>
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</html>
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"""
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end
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defp redirect_back(conn) do
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case get_req_header(conn, "referer") do
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[referer | _] ->
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uri = URI.parse(referer)
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uri.path || "/"
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_ ->
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"/"
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end
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end
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defp hash_ip(conn) do
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daily_salt = Date.utc_today() |> Date.to_iso8601()
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ip_string = conn.remote_ip |> :inet.ntoa() |> to_string()
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:crypto.hash(:sha256, ip_string <> daily_salt) |> Base.encode16(case: :lower)
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end
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end
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