opcotech/elemo

package email

import (
    "errors"
    "html/template"

    "github.com/opcotech/elemo/internal/pkg/validate"
)

// TemplateData represents the data needed to render an email template.
type TemplateData interface {
    // Get returns the template data.
    Get() any
}

// Template is a struct that represents the data needed to render
// an email template.
type Template struct {
    Path string       `validate:"required,filepath"`
    Data TemplateData `validate:"required"`
}

// Validate validates the password reset email template.
func (t *Template) Validate() error {
    if err := validate.Struct(t); err != nil {
        return errors.Join(ErrTemplateInvalid, err)
    }
    return nil
}

// Render returns the rendered template.
func (t *Template) Render() (string, error) {
    return emailBody[*template.Template](t.Path, t.Data.Get(), template.ParseFiles)
}

// NewTemplate returns a new email template.
func NewTemplate(path string, data TemplateData) (*Template, error) {
    t := &Template{
        Path: path,
        Data: data,
    }
    if err := t.Validate(); err != nil {
        return nil, err
    }
    return t, nil
}