99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
// Copyright (c) 2025 Nikolai Papin
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//
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// This file is part of Easywish
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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// the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package middleware
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import (
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"easywish/internal/utils/enums"
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"net/http"
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"github.com/gin-gonic/gin"
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)
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type UserInfo struct {
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Username string
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Role enums.Role
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}
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type Request[T any] struct {
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User UserInfo
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Body T
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}
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const requestKey = "request"
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func UserInfoFromContext(c *gin.Context) (*UserInfo, bool) {
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var username any
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var role any
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var ok bool
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username, ok = c.Get("username") ; if !ok {
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return &UserInfo{Username: "", Role: enums.GuestRole}, true
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}
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role, ok = c.Get("role"); if !ok {
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return nil, false
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}
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if username == nil {
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return &UserInfo{Username: "", Role: enums.GuestRole}, true
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}
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if role == nil {
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return nil, false
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}
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return &UserInfo{Username: username.(string), Role: role.(enums.Role)}, true
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}
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func RequestFromContext[T any](c *gin.Context) Request[T] {
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return c.Value(requestKey).(Request[T])
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}
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func RequestMiddleware[T any](role enums.Role) gin.HandlerFunc {
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return gin.HandlerFunc(func(c *gin.Context) {
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userInfo, ok := UserInfoFromContext(c)
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if !ok {
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c.Status(http.StatusUnauthorized)
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return
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}
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if userInfo.Role < role {
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c.Status(http.StatusForbidden)
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}
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var body T
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if err := c.ShouldBindJSON(&body); err != nil {
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c.String(http.StatusBadRequest, err.Error())
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// TODO: implement automatic validation here
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return
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}
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request := Request[T]{
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User: *userInfo,
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Body: body,
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}
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c.Set(requestKey, request)
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c.Next()
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})
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}
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