---
--- Generated by EmmyLua(https://github.com/EmmyLua)
--- Created by admin.
--- DateTime: 2025/11/21 11:55
--- 验证码相关函数

local _M = {}

local status = require("util.status")
local resp = require("util.response")
local genpic = require("util.generatechaptcha")
local red = require("share.redis")
local validator = require("validator.system.captcha")

--生成图片文件
function _M.getCaptcha()
    local filename, base64_data, captchaText = genpic.get_captcha_base64()
    if base64_data == nil then
        ngx.status = 500
        ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)
    end
    --将文件名存储到redis中 超时时间5分钟
    local key = "captcha-"..filename
    red:set(key, captchaText)
    red:expire(key, 5 * 60)

    -- 4.返回结果
    local ret = {
        picgid = filename,
        pic = base64_data
    }
    resp:response(status.SUCCESS, ret)
end

--验证图片上的验证码
function _M.checkCaptcha()
    --获取请求中参数
    local args = ngx.req.get_uri_args()
    -- 校验客户端请求参数
    local ok = validator.validateCheck(args)
    --验证失败则返回
    if not ok then
        ngx.exit(ngx.HTTP_BAD_REQUEST)
    end
    local picgid = args["picgid"]
    local code = args["code"]
    local key = "captcha-"..picgid
    local captchaText, err = red:get(key)
    if not captchaText or captchaText == ngx.null then
        resp:response(status.AUTH_CODE_INVALID)
        return
    end
    if captchaText ~= string.upper(code) then
        --print("captchaText:", captchaText, " code:", code)
        resp:response(status.AUTH_CODE_ERROR)
        red:del(key)
        return
    end
    red:del(key)
    resp:response(status.SUCCESS)
end

--验证码删除
function _M.deleteCaptcha()
    --获取请求中参数
    local args = ngx.req.get_uri_args()
    -- 校验客户端请求参数
    local ok = validator.validateAuthorize(args)
    --验证失败则返回
    if not ok then
        ngx.exit(ngx.HTTP_BAD_REQUEST)
    end
    --其中image为要删除的验证码图片的picgid。
    local picgid = args["picgid"]
    local key = "captcha-"..picgid
    red:del(key)
    resp:response(status.SUCCESS)
end

return _M