package main
import (
"encoding/base64"
"html/template"
"os"
"time"
)
func tpl(msgs []Message) error {
// First we create a FuncMap with which to register the function.
funcMap := template.FuncMap{
// The name "title" is what the function will be called in the template text.
"newDate": func(i int) bool {
if i == 0 {
return true
}
return msgs[i].Date.Sub(msgs[i-1].Date.Time) > time.Minute*30
},
"base64": func(data []byte) string {
return base64.StdEncoding.EncodeToString(data)
},
}
const templateText = `
Conversation: {{.Title}}
{{- range $index, $msg := .Messages}}
{{- if newDate $index}}
{{$msg.Date}}
{{end}}
{{- if $msg.Sent}}
{{else}}
{{$msg.Sender.Name}}
{{ end}}
{{- range $index, $attachment := $msg.Attachments}}
{{end}}
{{- $msg.Text}}
{{end}}
`
// Create a template, add the function map, and parse the text.
tmpl, err := template.New("smsMessage").Funcs(funcMap).Parse(templateText)
if err != nil {
return err
}
file, err := os.Create("untitled.html")
if err != nil {
return err
}
defer file.Close()
// Run the template to verify the output.
err = tmpl.Execute(file, struct {
Title string
Messages []Message
}{Title: "testing", Messages: msgs})
if err != nil {
return err
}
return nil
}