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#13 Allow attaching/embedding templates
Implemented the AttachTemplate and EmbedTemplate methods. Test coverage and documentation is still to be done
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1 changed files with 31 additions and 0 deletions
31
msg.go
31
msg.go
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@ -5,6 +5,7 @@ import (
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"context"
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"errors"
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"fmt"
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"html/template"
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"io"
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"math/rand"
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"mime"
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@ -435,6 +436,16 @@ func (m *Msg) AttachReader(n string, r io.Reader, o ...FileOption) {
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m.attachments = m.appendFile(m.attachments, f, o...)
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}
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// AttachTemplate adds the output of a template.Template pointer as File attachment to the Msg
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func (m *Msg) AttachTemplate(n string, t *template.Template, d interface{}, o ...FileOption) error {
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f, err := fileFromTemplate(n, t, d)
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if err != nil {
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return fmt.Errorf("failed to attach template: %w", err)
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}
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m.attachments = m.appendFile(m.attachments, f, o...)
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return nil
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}
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// EmbedFile adds an embedded File to the Msg
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func (m *Msg) EmbedFile(n string, o ...FileOption) {
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f := fileFromFS(n)
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@ -450,6 +461,16 @@ func (m *Msg) EmbedReader(n string, r io.Reader, o ...FileOption) {
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m.embeds = m.appendFile(m.embeds, f, o...)
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}
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// EmbedTemplate adds the output of a template.Template pointer as embedded File to the Msg
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func (m *Msg) EmbedTemplate(n string, t *template.Template, d interface{}, o ...FileOption) error {
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f, err := fileFromTemplate(n, t, d)
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if err != nil {
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return fmt.Errorf("failed to embed template: %w", err)
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}
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m.embeds = m.appendFile(m.embeds, f, o...)
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return nil
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}
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// Reset resets all headers, body parts and attachments/embeds of the Msg
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// It leaves already set encodings, charsets, boundaries, etc. as is
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func (m *Msg) Reset() {
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@ -668,6 +689,16 @@ func fileFromReader(n string, r io.Reader) *File {
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}
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}
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// fileFromTemplate returns a File pointer form a given template.Template
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func fileFromTemplate(n string, t *template.Template, d interface{}) (*File, error) {
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buf := bytes.Buffer{}
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if err := t.Execute(&buf, d); err != nil {
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return nil, fmt.Errorf("failed to execute template: %w", err)
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}
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f := fileFromReader(n, &buf)
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return f, nil
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}
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// getEncoder creates a new mime.WordEncoder based on the encoding setting of the message
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func getEncoder(e Encoding) mime.WordEncoder {
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switch e {
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