5c2f70ce44
Shipping rates fetched from Printify during product sync, converted to GBP at sync time using frankfurter.app ECB exchange rates with 5% buffer. Cached in shipping_rates table per blueprint/provider/country. Cart page shows shipping estimate with country selector (detected from Accept-Language header, persisted in cookie). Stripe Checkout includes shipping_options for UK domestic and international delivery. Order shipping_cost extracted from Stripe on payment. ScheduledSyncWorker runs every 6 hours via Oban cron to keep rates and exchange rates fresh. REST_OF_THE_WORLD fallback covers unlisted countries. 780 tests, 0 failures. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
56 lines
1.5 KiB
Elixir
56 lines
1.5 KiB
Elixir
defmodule SimpleshopThemeWeb.Plugs.CountryDetect do
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@moduledoc """
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Plug that detects the visitor's country from cookies or Accept-Language.
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Priority:
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1. `shipping_country` cookie (set when user explicitly changes country)
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2. Accept-Language header (locale tags like `en-GB` → `GB`)
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3. Falls back to `"GB"`
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The result is stored in the session as `country_code` so LiveViews can
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read it. Only runs once per session — skips if `country_code` is already
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set (unless the cookie has changed).
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"""
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import Plug.Conn
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@default_country "GB"
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@cookie_name "shipping_country"
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def init(opts), do: opts
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def call(conn, _opts) do
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cookie_country = conn.cookies[@cookie_name]
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session_country = get_session(conn, "country_code")
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cond do
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# Cookie takes priority — user explicitly chose this country
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cookie_country not in [nil, ""] and cookie_country != session_country ->
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put_session(conn, "country_code", cookie_country)
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# Session already set and no cookie override
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session_country != nil ->
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conn
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# First visit: detect from Accept-Language
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true ->
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country = detect_from_header(conn)
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put_session(conn, "country_code", country)
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end
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end
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defp detect_from_header(conn) do
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conn
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|> get_req_header("accept-language")
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|> List.first("")
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|> parse_country()
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end
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defp parse_country(header) do
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case Regex.run(~r/[a-z]{2}-([A-Z]{2})/, header) do
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[_, country] -> country
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nil -> @default_country
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end
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end
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end
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