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template.go
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template.go
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package templates
import (
"bytes"
"html/template"
"io/ioutil"
"net/http"
)
const (
templatesPath = "/templates"
templateFileName = "template.html"
)
func GetParsedTemplate(mailhtml string, contentData interface{}) (string, error) {
template, err := ParseTemplateFile(mailhtml, contentData)
if err != nil {
return "", err
}
return ParseTemplateText(template, contentData)
}
func ParseTemplateFile(mailhtml string, data interface{}) (string, error) {
tmpl, err := template.New("tmpl").Parse(mailhtml)
if err != nil {
return "", err
}
return parseTemplate(tmpl, data)
}
func ParseTemplateText(text string, data interface{}) (string, error) {
template, err := template.New("template").Parse(text)
if err != nil {
return "", err
}
return parseTemplate(template, data)
}
func parseTemplate(template *template.Template, data interface{}) (string, error) {
buf := new(bytes.Buffer)
if err := template.Execute(buf, data); err != nil {
return "", err
}
return buf.String(), nil
}
func readFile(dir http.FileSystem, fileName string) (*template.Template, error) {
f, err := dir.Open(templatesPath + "/" + fileName)
if err != nil {
return nil, err
}
defer f.Close()
content, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
tmpl, err := template.New(fileName).Parse(string(content))
if err != nil {
return nil, err
}
return tmpl, nil
}
func readFileFromDatabase(dir http.FileSystem, fileName string) (*template.Template, error) {
f, err := dir.Open(templatesPath + "/" + fileName)
if err != nil {
return nil, err
}
defer f.Close()
content, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
tmpl, err := template.New(fileName).Parse(string(content))
if err != nil {
return nil, err
}
return tmpl, nil
}