mirror of
https://github.com/lordmathis/lemma.git
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129 lines
3.2 KiB
Go
129 lines
3.2 KiB
Go
package auth
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import (
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"context"
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"fmt"
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"net/http"
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"strings"
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"novamd/internal/httpcontext"
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)
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type contextKey string
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const (
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UserContextKey contextKey = "user"
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)
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// UserClaims represents the user information stored in the request context
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type UserClaims struct {
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UserID int
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Role string
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}
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// Middleware handles JWT authentication for protected routes
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type Middleware struct {
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jwtService *JWTService
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}
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// NewMiddleware creates a new authentication middleware
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func NewMiddleware(jwtService *JWTService) *Middleware {
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return &Middleware{
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jwtService: jwtService,
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}
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}
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// Authenticate middleware validates JWT tokens and sets user information in context
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func (m *Middleware) Authenticate(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Extract token from Authorization header
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authHeader := r.Header.Get("Authorization")
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if authHeader == "" {
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http.Error(w, "Authorization header required", http.StatusUnauthorized)
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return
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}
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// Check Bearer token format
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parts := strings.Split(authHeader, " ")
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if len(parts) != 2 || parts[0] != "Bearer" {
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http.Error(w, "Invalid authorization format", http.StatusUnauthorized)
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return
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}
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// Validate token
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claims, err := m.jwtService.ValidateToken(parts[1])
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if err != nil {
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http.Error(w, "Invalid token", http.StatusUnauthorized)
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return
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}
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// Check token type
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if claims.Type != AccessToken {
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http.Error(w, "Invalid token type", http.StatusUnauthorized)
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return
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}
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// Add user claims to request context
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ctx := context.WithValue(r.Context(), UserContextKey, UserClaims{
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UserID: claims.UserID,
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Role: claims.Role,
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})
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// Call the next handler with the updated context
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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// RequireRole returns a middleware that ensures the user has the required role
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func (m *Middleware) RequireRole(role string) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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claims, ok := r.Context().Value(UserContextKey).(UserClaims)
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if !ok {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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return
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}
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if claims.Role != role && claims.Role != "admin" {
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http.Error(w, "Insufficient permissions", http.StatusForbidden)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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}
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func (m *Middleware) RequireWorkspaceAccess(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Get our handler context
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ctx, ok := httpcontext.GetRequestContext(w, r)
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if !ok {
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return
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}
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// If no workspace in context, allow the request (might be a non-workspace endpoint)
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if ctx.Workspace == nil {
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next.ServeHTTP(w, r)
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return
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}
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// Check if user has access (either owner or admin)
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if ctx.Workspace.UserID != ctx.UserID && ctx.UserRole != "admin" {
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http.Error(w, "Not Found", http.StatusNotFound)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// GetUserFromContext retrieves user claims from the request context
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func GetUserFromContext(ctx context.Context) (*UserClaims, error) {
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claims, ok := ctx.Value(UserContextKey).(UserClaims)
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if !ok {
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return nil, fmt.Errorf("no user found in context")
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}
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return &claims, nil
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}
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