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forgejo/modules/templates/mailer.go

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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package templates
import (
"context"
"html/template"
"io/fs"
"os"
"strings"
texttmpl "text/template"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/watcher"
)
// Mailer provides the templates required for sending notification mails.
func Mailer(ctx context.Context) (*texttmpl.Template, *template.Template) {
for _, funcs := range NewTextFuncMap() {
subjectTemplates.Funcs(funcs)
}
for _, funcs := range NewFuncMap() {
bodyTemplates.Funcs(funcs)
}
refreshTemplates := func() {
for _, assetPath := range BuiltinAssetNames() {
if !strings.HasPrefix(assetPath, "mail/") {
continue
}
if !strings.HasSuffix(assetPath, ".tmpl") {
continue
}
content, err := BuiltinAsset(assetPath)
if err != nil {
log.Warn("Failed to read embedded %s template. %v", assetPath, err)
continue
}
assetName := strings.TrimPrefix(strings.TrimSuffix(assetPath, ".tmpl"), "mail/")
log.Trace("Adding built-in mailer template for %s", assetName)
buildSubjectBodyTemplate(subjectTemplates,
bodyTemplates,
assetName,
content)
}
if err := walkMailerTemplates(func(path, name string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() {
return nil
}
content, err := os.ReadFile(path)
if err != nil {
log.Warn("Failed to read custom %s template. %v", path, err)
return nil
}
assetName := strings.TrimSuffix(name, ".tmpl")
log.Trace("Adding mailer template for %s from %q", assetName, path)
buildSubjectBodyTemplate(subjectTemplates,
bodyTemplates,
assetName,
content)
return nil
}); err != nil && !os.IsNotExist(err) {
log.Warn("Error whilst walking mailer templates directories. %v", err)
}
}
refreshTemplates()
if !setting.IsProd {
// Now subjectTemplates and bodyTemplates are both synchronized
// thus it is safe to call refresh from a different goroutine
watcher.CreateWatcher(ctx, "Mailer Templates", &watcher.CreateWatcherOpts{
PathsCallback: walkMailerTemplates,
BetweenCallback: refreshTemplates,
})
}
return subjectTemplates, bodyTemplates
}