Add Context to Plugin.Inject

This allows to access the request metadata and the session from injectors.

plugin.go

@@ -18,7 +18,7 @@ type Plugin interface {
 	SetRoutes(group *echo.Group)
 	// Inject is called prior to rendering a template. It can extend the
 	// template data by setting new items in the Extra map.
-	Inject(name string, data RenderData) error
+	Inject(ctx *Context, name string, data RenderData) error
 	// Close is called when the plugin is unloaded.
 	Close() error
 }

plugin_go.go

@@ -40,14 +40,14 @@ func (p *goPlugin) SetRoutes(group *echo.Group) {
 	group.Static("/plugins/"+p.p.Name+"/assets", pluginDir+"/"+p.p.Name+"/public/assets")
 }
 
-func (p *goPlugin) Inject(name string, data RenderData) error {
+func (p *goPlugin) Inject(ctx *Context, name string, data RenderData) error {
 	if f, ok := p.p.injectFuncs["*"]; ok {
-		if err := f(data); err != nil {
+		if err := f(ctx, data); err != nil {
 			return err
 		}
 	}
 	if f, ok := p.p.injectFuncs[name]; ok {
-		return f(data)
+		return f(ctx, data)
 	}
 	return nil
 }
@@ -114,7 +114,7 @@ func (p *GoPlugin) TemplateFuncs(funcs template.FuncMap) {
 }
 
 // InjectFunc is a function that injects data prior to rendering a template.
-type InjectFunc func(data RenderData) error
+type InjectFunc func(ctx *Context, data RenderData) error
 
 // Inject registers a function to execute prior to rendering a template. The
 // special name "*" matches any template.

plugin_lua.go

@@ -86,7 +86,7 @@ func (p *luaPlugin) inject(name string, data RenderData) error {
 	return nil
 }
 
-func (p *luaPlugin) Inject(name string, data RenderData) error {
+func (p *luaPlugin) Inject(ctx *Context, name string, data RenderData) error {
 	if err := p.inject("*", data); err != nil {
 		return err
 	}

template.go

@@ -87,7 +87,7 @@ func (r *renderer) Render(w io.Writer, name string, data interface{}, ectx echo.
 	ctx := ectx.Get("context").(*Context)
 
 	for _, plugin := range ctx.Server.Plugins {
-		if err := plugin.Inject(name, data.(RenderData)); err != nil {
+		if err := plugin.Inject(ctx, name, data.(RenderData)); err != nil {
 			return fmt.Errorf("failed to run plugin '%v': %v", plugin.Name(), err)
 		}
 	}