139 lines
3.4 KiB
Go
139 lines
3.4 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package template // import "miniflux.app/template"
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import (
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"bytes"
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"embed"
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"html/template"
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"strings"
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"time"
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"miniflux.app/errors"
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"miniflux.app/locale"
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"miniflux.app/logger"
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"github.com/gorilla/mux"
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)
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//go:embed templates/common/*.html
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var commonTemplateFiles embed.FS
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//go:embed templates/views/*.html
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var viewTemplateFiles embed.FS
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//go:embed templates/standalone/*.html
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var standaloneTemplateFiles embed.FS
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// Engine handles the templating system.
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type Engine struct {
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templates map[string]*template.Template
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funcMap *funcMap
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}
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// NewEngine returns a new template engine.
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func NewEngine(router *mux.Router) *Engine {
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return &Engine{
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templates: make(map[string]*template.Template),
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funcMap: &funcMap{router},
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}
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}
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// ParseTemplates parses template files embed into the application.
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func (e *Engine) ParseTemplates() error {
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var commonTemplateContents strings.Builder
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dirEntries, err := commonTemplateFiles.ReadDir("templates/common")
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if err != nil {
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return err
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}
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for _, dirEntry := range dirEntries {
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fileData, err := commonTemplateFiles.ReadFile("templates/common/" + dirEntry.Name())
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if err != nil {
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return err
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}
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commonTemplateContents.Write(fileData)
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}
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dirEntries, err = viewTemplateFiles.ReadDir("templates/views")
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if err != nil {
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return err
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}
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for _, dirEntry := range dirEntries {
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templateName := dirEntry.Name()
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fileData, err := viewTemplateFiles.ReadFile("templates/views/" + dirEntry.Name())
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if err != nil {
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return err
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}
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var templateContents strings.Builder
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templateContents.WriteString(commonTemplateContents.String())
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templateContents.Write(fileData)
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logger.Debug("[Template] Parsing: %s", templateName)
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e.templates[templateName] = template.Must(template.New("main").Funcs(e.funcMap.Map()).Parse(templateContents.String()))
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}
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dirEntries, err = standaloneTemplateFiles.ReadDir("templates/standalone")
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if err != nil {
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return err
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}
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for _, dirEntry := range dirEntries {
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templateName := dirEntry.Name()
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fileData, err := standaloneTemplateFiles.ReadFile("templates/standalone/" + dirEntry.Name())
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if err != nil {
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return err
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}
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logger.Debug("[Template] Parsing: %s", templateName)
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e.templates[templateName] = template.Must(template.New("base").Funcs(e.funcMap.Map()).Parse(string(fileData)))
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}
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return nil
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}
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// Render process a template.
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func (e *Engine) Render(name string, data map[string]interface{}) []byte {
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tpl, ok := e.templates[name]
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if !ok {
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logger.Fatal("[Template] The template %s does not exists", name)
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}
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printer := locale.NewPrinter(data["language"].(string))
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// Functions that need to be declared at runtime.
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tpl.Funcs(template.FuncMap{
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"elapsed": func(timezone string, t time.Time) string {
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return elapsedTime(printer, timezone, t)
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},
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"t": func(key interface{}, args ...interface{}) string {
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switch k := key.(type) {
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case string:
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return printer.Printf(k, args...)
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case errors.LocalizedError:
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return k.Localize(printer)
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case *errors.LocalizedError:
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return k.Localize(printer)
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case error:
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return k.Error()
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default:
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return ""
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}
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},
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"plural": func(key string, n int, args ...interface{}) string {
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return printer.Plural(key, n, args...)
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},
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})
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var b bytes.Buffer
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err := tpl.ExecuteTemplate(&b, "base", data)
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if err != nil {
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logger.Fatal("[Template] Unable to render template: %v", err)
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}
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return b.Bytes()
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}
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