Middleware+View+UserState: Add toast messages

Sources/App/Views/Shared/MainLayout.swift

@@ -19,17 +19,24 @@ struct MainLayout<Body: HTML>: HTMLDocument {
             .href("https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.3/css/bootstrap.min.css"),
             .integrity("sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH"),
             .crossorigin(.anonymous))
+
+        link(
+            .rel(.stylesheet),
+            .href("https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.11.3/font/bootstrap-icons.min.css"),
+            .integrity("sha384-XGjxtQfXaH2tnPFa9x+ruJTuLE3Aa6LhHSWRr1XeTyhezb4abCG4ccI5AkVDxqC+"),
+            .crossorigin(.anonymous))
+
         link(.rel(.stylesheet), .href("/css/style.css"))
 
         // ---------------------------------
         // Style
 
         style {
-"""
-body {
-    padding-top: 56px;
-}
-"""
+            """
+            body {
+                padding-top: 56px;
+            }
+            """
         }
     }
 
@@ -50,6 +57,9 @@ body {
                     pageContent
                 }
             }
+
+            // Placeholder for all toast messages
+            ToastView()
         }
 
         // ---------------------------------
@@ -76,6 +86,7 @@ body {
             .integrity("sha384-yhWpPsq2os1hEnx1I8cH7Ius6rclwTm3G2fhXDLF6Pzv7UnSsXY7BAj4fB6PIgSz"),
             .crossorigin(.anonymous)
         ) {}
+
         script(.src("/js/site.js")) {}
     }
 

Sources/App/Views/Shared/ToastView.swift

@@ -0,0 +1,53 @@
+import Elementary
+import ElementaryHTMX
+
+// Usage:
+//
+// let state = try getState(request: req)
+// state.toast = ToastState(message: "", title: "", level: ToastState.Level.error)
+// throw Abort(.badRequest, headers: ["HX-Trigger": "toast"])
+//
+// The header "HX-Trigger" will make the part refresh and show the toast message
+
+struct ToastView: HTML {
+
+    var state: ToastState = ToastState()
+
+    // -------------------------------------
+
+    var content: some HTML {
+        div(
+            .class("toast-container"), .id("cdiv_toast"),
+            .hx.get("/toast"),
+            .hx.trigger(HTMLAttributeValue.HTMX.EventTrigger(rawValue: "toast from:body")),
+            .hx.swap(.outerHTML)
+        ) {
+            div(.class("toast"), .id("toast")) {
+                div(.class("toast-header bg-\(state.level.rawValue) text-white")) {
+                    strong(.class("me-auto")) { state.title }
+                    button(
+                        .class("btn-close btn-close-white"), .type(.button),
+                        .data("bs-dismiss", value: "toast")
+                    ) {}
+                }
+                div(.class("toast-body")) { state.message }
+            }
+            if !state.message.isEmpty {
+                script {
+                    """
+                    runOnceAfterSettle(function () {
+                        const element = document.getElementById("toast");
+                        const toast = new bootstrap.Toast(element, { autohide: true, delay: 5000 });
+                        toast.show();
+
+                        element.addEventListener("hidden.bs.toast", function () {
+                            element.remove();
+                        });
+                    });
+                    """
+                }
+            }
+        }
+    }
+
+}