style: code maid is here!

refactored the project significantly to reduce the single-file monolith

routes/settings.go

@@ -0,0 +1,93 @@
+package routes
+
+import (
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/redis/go-redis/v9"
+
+	g "github.com/vencord/backend/globals"
+	"github.com/vencord/backend/util"
+)
+
+// /v1/settings
+
+func HEADSettings(c *fiber.Ctx) error {
+	userId := c.Context().UserValue("userId").(string)
+
+	written, err := g.RDB.HGet(c.Context(), "settings:"+util.Hash(g.PEPPER_SETTINGS+userId), "written").Result()
+
+	if err == redis.Nil {
+		return c.Status(404).Send(nil)
+	} else if err != nil {
+		panic(err)
+	}
+
+	c.Set("ETag", written)
+	return c.SendStatus(204)
+}
+
+func GETSettings(c *fiber.Ctx) error {
+	userId := c.Context().UserValue("userId").(string)
+
+	settings, err := g.RDB.HMGet(c.Context(), "settings:"+util.Hash(g.PEPPER_SETTINGS+userId), "value", "written").Result()
+
+	// we shouldn't expect an error here, HMGet doesn't return one
+	if err != nil {
+		panic(err)
+	}
+
+	if settings[0] == nil {
+		return c.Status(404).Send(nil)
+	}
+
+	// value is compressed data, written is a timestamp
+	value, written := []byte(settings[0].(string)), settings[1].(string)
+
+	if ifm := c.Get("if-none-match"); ifm == written {
+		return c.SendStatus(304)
+	}
+
+	c.Set("Content-Type", "application/octet-stream")
+	c.Set("ETag", written)
+	return c.Send(value)
+}
+
+func PUTSettings(c *fiber.Ctx) error {
+	if c.Get("Content-Type") != "application/octet-stream" {
+		return c.Status(415).JSON(&fiber.Map{
+			"error": "Content type must be application/octet-stream",
+		})
+	}
+
+	if len(c.Body()) > g.SIZE_LIMIT {
+		return c.Status(413).JSON(&fiber.Map{
+			"error": "Settings are too large",
+		})
+	}
+
+	userId := c.Context().UserValue("userId").(string)
+
+	now := time.Now().UnixMilli()
+
+	_, err := g.RDB.HSet(c.Context(), "settings:"+util.Hash(g.PEPPER_SETTINGS+userId), map[string]interface{}{
+		"value":   c.Body(),
+		"written": now,
+	}).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	return c.JSON(&fiber.Map{
+		"written": now,
+	})
+}
+
+func DELETESettings(c *fiber.Ctx) error {
+	userId := c.Context().UserValue("userId").(string)
+
+	g.RDB.Del(c.Context(), "settings:"+util.Hash(g.PEPPER_SETTINGS+userId))
+
+	return c.SendStatus(204)
+}