work in progress: image serving

ui/amcontext.go

@@ -18,8 +18,10 @@ import (
 
 type AmContext interface {
 	RC() int
+	OutputType() string
 	Render(string) error
 	SubRender(string) ([]byte, error)
+	SetOutputType(string)
 	SetRC(int)
 	URLPath() string
 	VarMap() jet.VarMap
@@ -29,12 +31,17 @@ type amContext struct {
 	echoContext echo.Context
 	httprc      int
 	rendervars  jet.VarMap
+	outputType  string
 }
 
 func (c *amContext) RC() int {
 	return c.httprc
 }
 
+func (c *amContext) OutputType() string {
+	return c.outputType
+}
+
 func (c *amContext) Render(name string) error {
 	return c.echoContext.Render(c.httprc, name, c)
 }
@@ -49,6 +56,10 @@ func (c *amContext) SubRender(name string) ([]byte, error) {
 	return buf.Bytes(), err
 }
 
+func (c *amContext) SetOutputType(typ string) {
+	c.outputType = typ
+}
+
 func (c *amContext) SetRC(rc int) {
 	c.httprc = rc
 }
@@ -66,6 +77,7 @@ func NewAmContext(ctxt echo.Context) AmContext {
 		echoContext: ctxt,
 		httprc:      http.StatusOK,
 		rendervars:  make(jet.VarMap),
+		outputType:  "",
 	}
 	ctxt.Set("amsterdam_context", &rc)
 	return &rc

ui/images.go

@@ -0,0 +1,36 @@
+/*
+ * Amsterdam Web Communities System
+ * Copyright (c) 2025 Erbosoft Metaverse Design Solutions, All Rights Reserved
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+package ui
+
+import (
+	"embed"
+	"fmt"
+	"mime"
+	"net/http"
+	"strings"
+)
+
+//go:embed static_images/*
+var static_images embed.FS
+
+func AmServeImage(ctxt AmContext) (string, any, error) {
+	components := strings.SplitAfter(ctxt.URLPath(), "/")
+	var err error = nil
+	if len(components) == 2 && components[0] == "builtin" {
+		var b []byte
+		b, err = static_images.ReadFile(fmt.Sprintf("static_images/%s", components[1]))
+		if err == nil {
+			mtype := mime.TypeByExtension(components[1][strings.LastIndex(components[1], "."):])
+			ctxt.SetOutputType(mtype)
+			return "bytes", b, nil
+		}
+	}
+	ctxt.SetRC(http.StatusNotFound)
+	return "string", fmt.Sprintf("File not found: %s", ctxt.URLPath()), err
+}

ui/render_wrap.go

@@ -20,6 +20,8 @@ func AmWrap(myfunc func(AmContext) (string, any, error)) echo.HandlerFunc {
 		what, rc, err := myfunc(amctxt)
 		if err == nil {
 			switch what {
+			case "bytes":
+				err = ctxt.Blob(amctxt.RC(), amctxt.OutputType(), rc.([]byte))
 			case "string":
 				err = ctxt.String(amctxt.RC(), fmt.Sprintf("%v", rc))
 			case "template":