From df7a0ae1c0fc177cba2eae8cc73fe21d2afdd229 Mon Sep 17 00:00:00 2001
From: SayaAndy <saya.andy@posteo.com>
Date: Fri, 24 Oct 2025 20:40:00 +0700
Subject: feat: allow to unsubscribe from an email

---
 internal/router/api-v1-subs.go           |  2 +-
 internal/router/lang-user-unsubscribe.go | 69 ++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 internal/router/lang-user-unsubscribe.go

(limited to 'internal/router')

diff --git a/internal/router/api-v1-subs.go b/internal/router/api-v1-subs.go
index 8995ebe..72f16e0 100644
--- a/internal/router/api-v1-subs.go
+++ b/internal/router/api-v1-subs.go
@@ -58,7 +58,7 @@ func Api_V1_Subs_Put(l map[string]*locale.LocaleConfig) func(c *fiber.Ctx) error
 		}
 
 		specificTags := c.FormValue("tags_picked")
-		if err = Mailer.Subscribe(id, subscriptionTypeEnum, specificTags); err != nil {
+		if err = Mailer.Subscribe(Mailer.GetHash(id), subscriptionTypeEnum, specificTags); err != nil {
 			return api_v1_email_sendStatusHtml(c, "subs-message", l, "Failed", fiber.StatusUnprocessableEntity, lang, l[lang].UserProfile.FailedToSubscribe, map[string]string{})
 		}
 
diff --git a/internal/router/lang-user-unsubscribe.go b/internal/router/lang-user-unsubscribe.go
new file mode 100644
index 0000000..a6ca89f
--- /dev/null
+++ b/internal/router/lang-user-unsubscribe.go
@@ -0,0 +1,69 @@
+package router
+
+import (
+	"fmt"
+	"html/template"
+	"log/slog"
+
+	"github.com/SayaAndy/saya-today-web/config"
+	"github.com/SayaAndy/saya-today-web/locale"
+	"github.com/gofiber/fiber/v2"
+)
+
+func init() {
+	assert(0, tm.Add("unsubscribe-page", "views/pages/unsubscribe-page.html"))
+}
+
+func Lang_User_Unsubscribe(l map[string]*locale.LocaleConfig, langs []config.AvailableLanguageConfig) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		lang := c.Params("lang")
+		for _, availableLang := range langs {
+			if availableLang.Name == lang {
+				goto langIsAvailable
+			}
+		}
+		return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("server does not support '%s' language", lang))
+
+	langIsAvailable:
+		var statusEmoji, statusText, statusColor string
+		var status int
+
+		unsubscribeCode := c.FormValue("code")
+		if unsubscribeCode == "" {
+			statusColor = "0, 0, 255"
+			statusEmoji = "(╭ರ_•́)"
+			statusText = l[lang].UnsubscribePage.UnsetCode
+			status = fiber.ErrBadRequest.Code
+		} else if clientError, serverError := Mailer.Unsubscribe(unsubscribeCode); clientError != nil {
+			statusColor = "255, 0, 0"
+			statusEmoji = "(͠≖~≖  ͡ )"
+			statusText = l[lang].UnsubscribePage.InvalidCode
+			status = fiber.ErrBadRequest.Code
+		} else if serverError != nil {
+			statusColor = "255, 128, 0"
+			statusEmoji = "( ˶°ㅁ°) !!"
+			statusText = l[lang].UnsubscribePage.OnServerError
+			status = fiber.ErrInternalServerError.Code
+		} else {
+			statusColor = "0, 255, 0,"
+			statusEmoji = "♡⸜(˶˃ ᵕ ˂˶)⸝♡"
+			statusText = l[lang].UnsubscribePage.Success
+			status = fiber.StatusOK
+		}
+
+		content, err := tm.Render("unsubscribe-page", fiber.Map{
+			"Lang":        lang,
+			"L":           l[lang],
+			"StatusEmoji": statusEmoji,
+			"StatusText":  statusText,
+			"StatusColor": template.HTML(statusColor),
+		})
+		if err != nil {
+			slog.Warn("failed to generate page", slog.String("page", "/"+lang+"/user/unsubscribe"), slog.String("error", err.Error()))
+			c.Set(fiber.HeaderContentType, fiber.MIMETextPlainCharsetUTF8)
+			return c.Status(fiber.ErrInternalServerError.Code).SendString("failed to generate page")
+		}
+
+		return c.Type("html").Status(status).Send(content)
+	}
+}
-- 
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