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templates.go
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templates.go
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package stemplate
import (
"fmt"
htmltemplate "html/template"
"io/fs"
"os"
"path/filepath"
"strings"
texttemplate "text/template"
)
func LoadTextTemplates(dirPath string, funcMap texttemplate.FuncMap) (*texttemplate.Template, error) {
rootTpl := texttemplate.New("")
rootTpl = rootTpl.Option("missingkey=error")
rootTpl = rootTpl.Funcs(funcMap)
err := filepath.Walk(dirPath,
func(filePath string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
if !strings.HasSuffix(filePath, ".txt.gotpl") {
return nil
}
start := len(dirPath) + 1
end := len(filePath) - len(".gotpl")
tplName := filePath[start:end]
tplData, err := os.ReadFile(filePath)
if err != nil {
return fmt.Errorf("cannot read %q: %w", filePath, err)
}
tmpl := rootTpl.New(tplName)
if _, err := tmpl.Parse(string(tplData)); err != nil {
return fmt.Errorf("cannot parse %q: %w", filePath, err)
}
return nil
})
if err != nil {
return nil, err
}
return rootTpl, nil
}
func LoadHTMLTemplates(dirPath string, funcMap htmltemplate.FuncMap) (*htmltemplate.Template, error) {
rootTpl := htmltemplate.New("")
rootTpl = rootTpl.Option("missingkey=error")
rootTpl = rootTpl.Funcs(funcMap)
err := filepath.Walk(dirPath,
func(filePath string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
if !strings.HasSuffix(filePath, ".html.gotpl") {
return nil
}
start := len(dirPath) + 1
end := len(filePath) - len(".gotpl")
tplName := filePath[start:end]
tplData, err := os.ReadFile(filePath)
if err != nil {
return fmt.Errorf("cannot read %q: %w", filePath, err)
}
tmpl := rootTpl.New(tplName)
if _, err := tmpl.Parse(string(tplData)); err != nil {
return fmt.Errorf("cannot parse %q: %w", filePath, err)
}
return nil
})
if err != nil {
return nil, err
}
return rootTpl, nil
}