34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
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package smtp
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import (
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"html/template"
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"io/fs"
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"strings"
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"code.nochebuena.dev/einherjar/core/xerrors"
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)
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// Template wraps stdlib html/template for HTML email rendering.
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// Rendering is intentionally separate from [Sender.Send] — callers render
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// a template to a string and assign it to [Message.Body].
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type Template struct{ t *template.Template }
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// ParseFS parses the named pattern files from fsys into a Template.
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// Returns an error if any pattern matches no files or a file fails to parse.
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func ParseFS(fsys fs.FS, patterns ...string) (*Template, error) {
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t, err := template.ParseFS(fsys, patterns...)
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if err != nil {
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return nil, xerrors.New(xerrors.ErrInvalidInput, "smtp: parse template").WithError(err)
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}
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return &Template{t: t}, nil
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}
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// Render executes the named template with data and returns the rendered string.
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func (t *Template) Render(name string, data any) (string, error) {
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var buf strings.Builder
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if err := t.t.ExecuteTemplate(&buf, name, data); err != nil {
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return "", xerrors.New(xerrors.ErrInternal, "smtp: render template").WithError(err)
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}
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return buf.String(), nil
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}
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