Initial Commit

errors.go

@@ -0,0 +1,68 @@
+/*
+ * distrohop - A utility for correlating and identifying equivalent software
+ * packages across different Linux distributions
+ *
+ * Copyright (C) 2025 Elara Ivy <elara@elara.ws>
+ *
+ * This file is part of distrohop.
+ *
+ * distrohop is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * distrohop is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with distrohop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"go.elara.ws/salix"
+)
+
+type httpError struct {
+	error
+	StatusCode int
+}
+
+func handleErrJSON(fn func(w http.ResponseWriter, r *http.Request) error) http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		err := fn(w, r)
+		if err != nil {
+			if he, ok := err.(httpError); ok {
+				w.WriteHeader(he.StatusCode)
+			} else {
+				w.WriteHeader(http.StatusInternalServerError)
+			}
+			json.NewEncoder(w).Encode(map[string]any{
+				"error": err.Error(),
+			})
+		}
+	})
+}
+
+func handleErrGUI(ns *salix.Namespace, fn func(w http.ResponseWriter, r *http.Request) error) http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		err := fn(w, r)
+		if err != nil {
+			if he, ok := err.(httpError); ok {
+				w.WriteHeader(he.StatusCode)
+			} else {
+				w.WriteHeader(http.StatusInternalServerError)
+			}
+			ns.ExecuteTemplate(w, "error.html", map[string]any{
+				"page": "Error",
+				"err":  err.Error(),
+			})
+		}
+	})
+}