add: cors handler route and readme

internal/api/handlers/dicom.go

@@ -4,8 +4,10 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"net/url"
 	"strings"
 
+	"devone.aplikasi.web.id/gitea/mario/go-ohif-proxy/internal/auth"
 	"devone.aplikasi.web.id/gitea/mario/go-ohif-proxy/internal/proxy"
 	"github.com/go-chi/chi/v5"
 	"go.uber.org/zap"
@@ -27,6 +29,13 @@ func NewDicomHandler(client *proxy.Client, logger *zap.Logger) *DicomHandler {
 
 // ForwardRequest forwards the request to Google Healthcare API
 func (h *DicomHandler) ForwardRequest(w http.ResponseWriter, r *http.Request) {
+	// Get claims from context if they exist
+	var claims *auth.CustomClaims
+	claimsValue := r.Context().Value("claims")
+	if claimsValue != nil {
+		claims = claimsValue.(*auth.CustomClaims)
+	}
+
 	// Get the path after /dicomWeb
 	urlPath := chi.URLParam(r, "*")
 
@@ -45,6 +54,46 @@ func (h *DicomHandler) ForwardRequest(w http.ResponseWriter, r *http.Request) {
 		zap.String("url", r.URL.String()),
 	)
 
+	// Copy query parameters
+	queryParams := r.URL.Query()
+
+	// Apply role-specific query modifications
+	if claims != nil {
+		switch claims.Role {
+		case "patient":
+			// For patients requesting study list, filter to only show their study
+			if strings.HasPrefix(urlPath, "/studies") && !strings.Contains(urlPath, "/") {
+				// Ensure only the patient's study is shown
+				queryParams.Set("StudyInstanceUID", claims.StudyIUID)
+			}
+		case "ref_doctor":
+			// For ref_doctor requesting study list, apply filter from token
+			if strings.HasPrefix(urlPath, "/studies") && !strings.Contains(urlPath, "/") && claims.FilterURL != "" {
+				// Parse the filter URL and add its query params
+				filterURL, err := url.Parse(claims.FilterURL)
+				if err == nil {
+					filterQuery := filterURL.Query()
+					for key, values := range filterQuery {
+						for _, value := range values {
+							queryParams.Add(key, value)
+						}
+					}
+				}
+			}
+		case "expertise_doctor":
+			// No restrictions for expertise_doctor
+		}
+	}
+
+	// Add the query string back to the path
+	encodedQuery := queryParams.Encode()
+	if encodedQuery != "" {
+		if !strings.HasPrefix(urlPath, "/") {
+			urlPath = "/" + urlPath
+		}
+		urlPath = urlPath + "?" + encodedQuery
+	}
+
 	// Read request body if present
 	var bodyBytes []byte
 	if r.Body != nil && r.ContentLength > 0 {
@@ -57,15 +106,6 @@ func (h *DicomHandler) ForwardRequest(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	// Copy query parameters
-	queryParams := r.URL.Query().Encode()
-	if queryParams != "" {
-		if !strings.HasPrefix(urlPath, "/") {
-			urlPath = "/" + urlPath
-		}
-		urlPath = urlPath + "?" + queryParams
-	}
-
 	// Get request headers
 	headers := make(map[string]string)
 	for k, v := range r.Header {