numerus/pkg/template.go

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package pkg
import (
"fmt"
"golang.org/x/text/language"
"golang.org/x/text/message"
"golang.org/x/text/number"
"html/template"
"io"
"math"
"net/http"
"strconv"
"time"
)
const overrideMethodName = "_method"
func templateFile(name string) string {
return "web/template/" + name
}
func mustRenderTemplate(wr io.Writer, r *http.Request, layout string, filename string, data interface{}) {
locale := getLocale(r)
company := getCompany(r)
user := getUser(r)
t := template.New(filename)
t.Funcs(template.FuncMap{
"gettext": locale.Get,
"pgettext": locale.GetC,
"currentLocale": func() string {
return locale.Language.String()
},
"companyURI": func(uri string) string {
return companyURI(company, uri)
},
"formatPrice": func(price string) string {
return formatPrice(price, locale.Language, locale.CurrencyPattern, company.DecimalDigits, company.CurrencySymbol)
},
"formatPriceSpan": func(price string) template.HTML {
return template.HTML(formatPrice(price, locale.Language, locale.CurrencyPattern, company.DecimalDigits, "<span>"+company.CurrencySymbol+"</span>"))
},
"formatDate": func(time time.Time) template.HTML {
return template.HTML(`<time datetime="` + time.Format("2006-01-02") + `">` + time.Format("02/01/2006") + "</time>")
},
"unsafe": func(s string) template.HTML {
return template.HTML(s)
},
"formatPercent": func(value int) string {
return fmt.Sprintf("%d %%", value)
},
"csrfToken": func() template.HTML {
return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s">`, csrfTokenField, user.CsrfToken))
},
"addInputAttr": func(attr string, field *InputField) *InputField {
field.Attributes = append(field.Attributes, template.HTMLAttr(attr))
return field
},
"addSelectAttr": func(attr string, field *SelectField) *SelectField {
field.Attributes = append(field.Attributes, template.HTMLAttr(attr))
return field
},
"addTagsAttr": func(attr string, field *TagsField) *TagsField {
field.Attributes = append(field.Attributes, template.HTMLAttr(attr))
return field
},
"boolToInt": func(b bool) int {
if b {
return 1
} else {
return 0
}
},
"add": func(y, x int) int {
return x + y
},
"sub": func(y, x int) int {
return x - y
},
"deleteMethod": func() template.HTML {
return overrideMethodField(http.MethodDelete)
},
"putMethod": func() template.HTML {
return overrideMethodField(http.MethodPut)
},
"humanizeBytes": func(bytes int64) string {
sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
return humanizeBytes(bytes, 1024, sizes)
},
"slugify": func(s string) string {
return slugify(s)
},
})
if _, err := t.ParseFiles(templateFile(filename), templateFile(layout), templateFile("form.gohtml")); err != nil {
panic(err)
}
if w, ok := wr.(http.ResponseWriter); ok {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
}
if err := t.ExecuteTemplate(wr, layout, data); err != nil {
panic(err)
}
}
func companyURI(company *Company, uri string) string {
if company == nil {
return uri
}
return "/company/" + company.Slug + uri
}
func overrideMethodField(method string) template.HTML {
return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s">`, overrideMethodName, method))
}
func mustRenderAppTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
mustRenderTemplate(w, r, "app.gohtml", filename, data)
}
func mustRenderModalTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
if IsHTMxRequest(r) {
mustRenderTemplate(w, r, "modal.gohtml", filename, data)
} else {
mustRenderAppTemplate(w, r, filename, data)
}
}
func mustRenderMainTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
if IsHTMxRequest(r) {
mustRenderTemplate(w, r, "main.gohtml", filename, data)
} else {
mustRenderAppTemplate(w, r, filename, data)
}
}
func mustRenderStandaloneTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
mustRenderTemplate(w, r, "standalone.gohtml", filename, data)
}
func mustRenderWebTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
mustRenderTemplate(w, r, "web.gohtml", filename, data)
}
func humanizeBytes(s int64, base float64, sizes []string) string {
if s < 10 {
return fmt.Sprintf("%d B", s)
}
e := math.Floor(logn(float64(s), base))
suffix := sizes[int(e)]
val := math.Floor(float64(s)/math.Pow(base, e)*10+0.5) / 10
f := "%.0f %s"
if val < 10 {
f = "%.1f %s"
}
return fmt.Sprintf(f, val, suffix)
}
func logn(n, b float64) float64 {
return math.Log(n) / math.Log(b)
}
func formatPrice(price string, language language.Tag, currencyPattern string, decimalDigits int, currencySymbol string) string {
p := message.NewPrinter(language)
f, err := strconv.ParseFloat(price, 64)
if err != nil {
f = math.NaN()
}
return p.Sprintf(currencyPattern, decimalDigits, number.Decimal(f), currencySymbol)
}