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93 lines
2.5 KiB
93 lines
2.5 KiB
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package render
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import (
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"html/template"
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"net/http"
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)
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// Delims represents a set of Left and Right delimiters for HTML template rendering.
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type Delims struct {
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// Left delimiter, defaults to {{.
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Left string
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// Right delimiter, defaults to }}.
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Right string
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}
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// HTMLRender interface is to be implemented by HTMLProduction and HTMLDebug.
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type HTMLRender interface {
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// Instance returns an HTML instance.
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Instance(string, any) Render
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}
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// HTMLProduction contains template reference and its delims.
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type HTMLProduction struct {
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Template *template.Template
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Delims Delims
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}
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// HTMLDebug contains template delims and pattern and function with file list.
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type HTMLDebug struct {
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Files []string
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Glob string
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Delims Delims
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FuncMap template.FuncMap
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}
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// HTML contains template reference and its name with given interface object.
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type HTML struct {
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Template *template.Template
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Name string
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Data any
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}
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var htmlContentType = []string{"text/html; charset=utf-8"}
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// Instance (HTMLProduction) returns an HTML instance which it realizes Render interface.
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func (r HTMLProduction) Instance(name string, data any) Render {
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return HTML{
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Template: r.Template,
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Name: name,
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Data: data,
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}
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}
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// Instance (HTMLDebug) returns an HTML instance which it realizes Render interface.
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func (r HTMLDebug) Instance(name string, data any) Render {
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return HTML{
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Template: r.loadTemplate(),
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Name: name,
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Data: data,
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}
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}
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func (r HTMLDebug) loadTemplate() *template.Template {
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if r.FuncMap == nil {
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r.FuncMap = template.FuncMap{}
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}
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if len(r.Files) > 0 {
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return template.Must(template.New("").Delims(r.Delims.Left, r.Delims.Right).Funcs(r.FuncMap).ParseFiles(r.Files...))
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}
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if r.Glob != "" {
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return template.Must(template.New("").Delims(r.Delims.Left, r.Delims.Right).Funcs(r.FuncMap).ParseGlob(r.Glob))
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}
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panic("the HTML debug render was created without files or glob pattern")
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}
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// Render (HTML) executes template and writes its result with custom ContentType for response.
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func (r HTML) Render(w http.ResponseWriter) error {
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r.WriteContentType(w)
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if r.Name == "" {
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return r.Template.Execute(w, r.Data)
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}
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return r.Template.ExecuteTemplate(w, r.Name, r.Data)
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}
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// WriteContentType (HTML) writes HTML ContentType.
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func (r HTML) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, htmlContentType)
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}
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