package middleware

import (
	"github.com/gin-gonic/gin"
)

// CCPAContextKey is the key used to store "Do Not Sell" preference in context
const CCPAContextKey = "do_not_sell"

// CCPA middleware reads the Sec-GPC (Global Privacy Control) header.
// When Sec-GPC: 1 is present, it sets do_not_sell=true in context and adds GPC: 1 to the response.
// This honors the CCPA "Do Not Sell" signal per Global Privacy Control specification.
func CCPA() gin.HandlerFunc {
	return func(c *gin.Context) {
		if c.GetHeader("Sec-GPC") == "1" {
			c.Set(CCPAContextKey, true)
			c.Header("GPC", "1")
		}
		c.Next()
	}
}