Make UI plugins much more memory efficient by using io.Pipe and add methods to the post plugintype

pkgs/plugintypes/goblog.go

@@ -25,8 +25,16 @@ type Database interface {
 
 // Post
 type Post interface {
+	// Get the post path
+	GetPath() string
 	// Get a string array map with all the post's parameters
 	GetParameters() map[string][]string
+	// Get the post section name
+	GetSection() string
+	// Get the published date string
+	GetPublished() string
+	// Get the updated date string
+	GetUpdated() string
 }
 
 // RenderContext

pkgs/yaegiwrappers/go_goblog_app-app-pkgs-plugintypes.go

@@ -131,11 +131,27 @@ func (W _go_goblog_app_app_pkgs_plugintypes_Middleware) Prio() int {
 type _go_goblog_app_app_pkgs_plugintypes_Post struct {
 	IValue         interface{}
 	WGetParameters func() map[string][]string
+	WGetPath       func() string
+	WGetPublished  func() string
+	WGetSection    func() string
+	WGetUpdated    func() string
 }
 
 func (W _go_goblog_app_app_pkgs_plugintypes_Post) GetParameters() map[string][]string {
 	return W.WGetParameters()
 }
+func (W _go_goblog_app_app_pkgs_plugintypes_Post) GetPath() string {
+	return W.WGetPath()
+}
+func (W _go_goblog_app_app_pkgs_plugintypes_Post) GetPublished() string {
+	return W.WGetPublished()
+}
+func (W _go_goblog_app_app_pkgs_plugintypes_Post) GetSection() string {
+	return W.WGetSection()
+}
+func (W _go_goblog_app_app_pkgs_plugintypes_Post) GetUpdated() string {
+	return W.WGetUpdated()
+}
 
 // _go_goblog_app_app_pkgs_plugintypes_RenderContext is an interface wrapper for RenderContext type
 type _go_goblog_app_app_pkgs_plugintypes_RenderContext struct {

plugins.go

@@ -78,6 +78,22 @@ func (a *goBlog) GetPost(path string) (plugintypes.Post, error) {
 	return a.getPost(path)
 }
 
+func (p *post) GetPath() string {
+	return p.Path
+}
+
 func (p *post) GetParameters() map[string][]string {
 	return p.Parameters
 }
+
+func (p *post) GetSection() string {
+	return p.Section
+}
+
+func (p *post) GetPublished() string {
+	return p.Published
+}
+
+func (p *post) GetUpdated() string {
+	return p.Updated
+}

render.go

@@ -4,7 +4,6 @@ import (
 	"io"
 	"net/http"
 
-	"go.goblog.app/app/pkgs/bufferpool"
 	"go.goblog.app/app/pkgs/contenttype"
 	"go.goblog.app/app/pkgs/htmlbuilder"
 	"go.goblog.app/app/pkgs/plugintypes"
@@ -41,26 +40,35 @@ func (a *goBlog) renderWithStatusCode(w http.ResponseWriter, r *http.Request, st
 	// Write status code
 	w.WriteHeader(statusCode)
 	// Render
-	buf := bufferpool.Get()
-	defer bufferpool.Put(buf)
-	f(htmlbuilder.NewHtmlBuilder(buf), data)
-	// Check if UI plugins are registered
-	uiPlugins := a.getPlugins(pluginUiType)
-	if len(uiPlugins) > 0 {
-		pluginBuf := bufferpool.Get()
-		defer bufferpool.Put(pluginBuf)
-		for _, plug := range uiPlugins {
-			pluginBuf.Reset()
-			plug.(plugintypes.UI).Render(&pluginRenderContext{
-				blog: data.BlogString,
-				path: r.URL.Path,
-			}, buf, pluginBuf)
-			buf.Reset()
-			_, _ = io.Copy(buf, pluginBuf)
-		}
-	}
+	renderPipeReader, renderPipeWriter := io.Pipe()
+	go func() {
+		f(htmlbuilder.NewHtmlBuilder(renderPipeWriter), data)
+		renderPipeWriter.Close()
+	}()
+	// Run UI plugins
+	pluginPipeReader, pluginPipeWriter := io.Pipe()
+	go func() {
+		a.chainUiPlugins(a.getPlugins(pluginUiType), &pluginRenderContext{
+			blog: data.BlogString,
+			path: r.URL.Path,
+		}, renderPipeReader, pluginPipeWriter)
+		pluginPipeWriter.Close()
+	}()
 	// Return minified HTML
-	_ = a.min.Get().Minify(contenttype.HTML, w, buf)
+	_ = a.min.Get().Minify(contenttype.HTML, w, pluginPipeReader)
+}
+
+func (a *goBlog) chainUiPlugins(plugins []any, rc *pluginRenderContext, rendered io.Reader, modified io.Writer) {
+	if len(plugins) == 0 {
+		_, _ = io.Copy(modified, rendered)
+		return
+	}
+	reader, writer := io.Pipe()
+	go func() {
+		plugins[0].(plugintypes.UI).Render(rc, rendered, writer)
+		_ = writer.Close()
+	}()
+	a.chainUiPlugins(plugins[1:], rc, reader, modified)
 }
 
 func (a *goBlog) checkRenderData(r *http.Request, data *renderData) {