feat: convert markdown to html

email.go

@@ -1,12 +1,17 @@
 package main
 
 import (
+	"bytes"
 	"os"
+	"strings"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/resendlabs/resend-go"
+	"github.com/yuin/goldmark"
 )
 
+const TO_SEPARATOR = ","
+
 // sendEmailSuccessMsg is the tea.Msg handled by Bubble Tea when the email has
 // been sent successfully.
 type sendEmailSuccessMsg struct{}
@@ -26,7 +31,7 @@ func (m Model) sendEmailCmd() tea.Cmd {
 			}
 			attachments[i] = string(at)
 		}
-		err := sendEmail(m.From.Value(), m.To.Value(), m.Subject.Value(), m.Body.Value(), attachments)
+		err := sendEmail(strings.Split(m.To.Value(), TO_SEPARATOR), m.From.Value(), m.Subject.Value(), m.Body.Value(), attachments)
 		if err != nil {
 			return sendEmailFailureMsg(err)
 		}
@@ -34,17 +39,24 @@ func (m Model) sendEmailCmd() tea.Cmd {
 	}
 }
 
-func sendEmail(from, to, subject, body string, attachments []string) error {
+func sendEmail(to []string, from, subject, body string, attachments []string) error {
 	client := resend.NewClient(os.Getenv(RESEND_API_KEY))
 
+	var html, text = bytes.NewBufferString(""), bytes.NewBufferString("")
+	err := goldmark.Convert([]byte(body), html)
+	if err != nil {
+		text.WriteString(body)
+	}
+
 	request := &resend.SendEmailRequest{
 		From:    from,
-		To:      []string{to},
+		To:      to,
 		Subject: subject,
-		Html:    body,
+		Html:    html.String(),
+		Text:    text.String(),
 	}
 
-	_, err := client.Emails.Send(request)
+	_, err = client.Emails.Send(request)
 	if err != nil {
 		return err
 	}

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/charmbracelet/lipgloss v0.7.1
 	github.com/resendlabs/resend-go v1.6.0
 	github.com/spf13/cobra v1.7.0
+	github.com/yuin/goldmark v1.5.4
 	golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1
 )
 

go.sum

@@ -48,6 +48,8 @@ github.com/spf13/cobra v1.7.0/go.mod h1:uLxZILRyS/50WlhOIKD7W6V5bgeIt+4sICxh6uRM
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/yuin/goldmark v1.5.4 h1:2uY/xC0roWy8IBEGLgB1ywIoEJFGmRrX21YQcvGZzjU=
+github.com/yuin/goldmark v1.5.4/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1 h1:k/i9J1pBpvlfR+9QsetwPyERsqu1GIbi967PQMq3Ivc=
 golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1/go.mod h1:V1LtkGg67GoY2N1AnLN78QLrzxkLyJw7RJb1gzOOz9w=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=

main.go

@@ -2,20 +2,52 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"os"
 
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/resendlabs/resend-go"
 	"github.com/spf13/cobra"
 )
 
 const RESEND_API_KEY = "RESEND_API_KEY"
+const RESEND_FROM = "RESEND_FROM"
+
+var (
+	from        string
+	to          []string
+	subject     string
+	body        string
+	attachments []string
+)
 
 var rootCmd = &cobra.Command{
 	Use:   "email",
 	Short: "email is a command line interface for sending emails.",
 	Long:  `email is a command line interface for sending emails.`,
 	RunE: func(cmd *cobra.Command, args []string) error {
-		p := tea.NewProgram(NewModel())
+		if hasStdin() {
+			b, err := io.ReadAll(os.Stdin)
+			if err != nil {
+				return err
+			}
+			body = string(b)
+		}
+
+		if len(to) > 0 && from != "" && subject != "" && body != "" {
+			err := sendEmail(to, from, subject, body, attachments)
+			if err != nil {
+				return err
+			}
+			return nil
+		}
+
+		p := tea.NewProgram(NewModel(resend.SendEmailRequest{
+			From:    from,
+			To:      to,
+			Subject: subject,
+			Text:    body,
+		}))
 		_, err := p.Run()
 		if err != nil {
 			return err
@@ -24,6 +56,22 @@ var rootCmd = &cobra.Command{
 	},
 }
 
+// hasStdin returns whether there is data in stdin.
+func hasStdin() bool {
+	stat, err := os.Stdin.Stat()
+	return err == nil && (stat.Mode()&os.ModeCharDevice) == 0
+}
+
+func init() {
+	rootCmd.Flags().StringSliceVar(&to, "bcc", []string{}, "Blind carbon copy recipients")
+	rootCmd.Flags().StringSliceVar(&to, "cc", []string{}, "Carbon copy recipients")
+	rootCmd.Flags().StringSliceVarP(&attachments, "attach", "a", []string{}, "Email's attachments")
+	rootCmd.Flags().StringSliceVarP(&to, "to", "t", []string{}, "Recipient emails")
+	rootCmd.Flags().StringVarP(&body, "body", "b", "", "Email's body (markdown)")
+	rootCmd.Flags().StringVarP(&from, "from", "f", os.Getenv(RESEND_FROM), "Email's sender ($RESEND_FROM)")
+	rootCmd.Flags().StringVarP(&subject, "subject", "s", "", "Email's subject")
+}
+
 func main() {
 	key := os.Getenv(RESEND_API_KEY)
 	if key == "" {

model.go

@@ -12,6 +12,7 @@ import (
 	"github.com/charmbracelet/bubbles/textarea"
 	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/resendlabs/resend-go"
 	"golang.org/x/exp/constraints"
 )
 
@@ -54,7 +55,7 @@ type Model struct {
 	err            error
 }
 
-func NewModel() Model {
+func NewModel(defaults resend.SendEmailRequest) Model {
 	from := textinput.New()
 	from.Prompt = "From "
 	from.Placeholder = "me@example.com"
@@ -63,6 +64,7 @@ func NewModel() Model {
 	from.TextStyle = activeTextStyle
 	from.Cursor.Style = cursorStyle
 	from.PlaceholderStyle = placeholderStyle
+	from.SetValue(defaults.From)
 	from.Focus()
 
 	to := textinput.New()
@@ -70,14 +72,18 @@ func NewModel() Model {
 	to.PromptStyle = labelStyle.Copy()
 	to.Cursor.Style = cursorStyle
 	to.PlaceholderStyle = placeholderStyle
+	to.TextStyle = textStyle
 	to.Placeholder = "you@example.com"
+	to.SetValue(strings.Join(defaults.To, TO_SEPARATOR))
 
 	subject := textinput.New()
 	subject.Prompt = "Subject "
 	subject.PromptStyle = labelStyle.Copy()
 	subject.Cursor.Style = cursorStyle
 	subject.PlaceholderStyle = placeholderStyle
+	subject.TextStyle = textStyle
 	subject.Placeholder = "Hello!"
+	subject.SetValue(defaults.Subject)
 
 	body := textarea.New()
 	body.Placeholder = "# Email"
@@ -91,6 +97,8 @@ func NewModel() Model {
 	body.BlurredStyle.Text = textStyle
 	body.BlurredStyle.Placeholder = placeholderStyle
 	body.Cursor.Style = cursorStyle
+	body.CharLimit = 4000
+	body.SetValue(defaults.Text)
 	body.Blur()
 
 	attachments := list.New([]list.Item{}, attachmentDelegate{}, 0, 3)