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// Copyright 2018 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package template // import "miniflux.app/template"
import (
"encoding/base64"
"fmt"
"html/template"
"math"
"net/mail"
"strings"
"time"
"miniflux.app/config"
"miniflux.app/http/route"
"miniflux.app/locale"
"miniflux.app/model"
"miniflux.app/timezone"
"miniflux.app/url"
"github.com/PuerkitoBio/goquery"
"github.com/gorilla/mux"
)
type funcMap struct {
router *mux.Router
}
// Map returns a map of template functions that are compiled during template parsing.
func (f *funcMap) Map() template.FuncMap {
return template.FuncMap{
"formatFileSize": formatFileSize,
"dict": dict,
"hasKey": hasKey,
"truncate": truncate,
"isEmail": isEmail,
"baseURL": func() string {
return config.Opts.BaseURL()
},
"rootURL": func() string {
return config.Opts.RootURL()
},
"hasOAuth2Provider": func(provider string) bool {
return config.Opts.OAuth2Provider() == provider
},
"route": func(name string, args ...interface{}) string {
return route.Path(f.router, name, args...)
},
"noescape": func(str string) template.HTML {
return template.HTML(str)
},
"proxyFilter": func(data string) string {
return imageProxyFilter(f.router, data)
},
"proxyURL": func(link string) string {
proxyImages := config.Opts.ProxyImages()
if proxyImages == "all" || (proxyImages != "none" && !url.IsHTTPS(link)) {
return proxify(f.router, link)
}
return link
},
"domain": func(websiteURL string) string {
return url.Domain(websiteURL)
},
"hasPrefix": func(str, prefix string) bool {
return strings.HasPrefix(str, prefix)
},
"contains": func(str, substr string) bool {
return strings.Contains(str, substr)
},
"isodate": func(ts time.Time) string {
return ts.Format("2006-01-02 15:04:05")
},
"theme_color": func(theme string) string {
return model.ThemeColor(theme)
},
// These functions are overrided at runtime after the parsing.
"elapsed": func(timezone string, t time.Time) string {
return ""
},
"t": func(key interface{}, args ...interface{}) string {
return ""
},
"plural": func(key string, n int, args ...interface{}) string {
return ""
},
}
}
func dict(values ...interface{}) (map[string]interface{}, error) {
if len(values)%2 != 0 {
return nil, fmt.Errorf("dict expects an even number of arguments")
}
dict := make(map[string]interface{}, len(values)/2)
for i := 0; i < len(values); i += 2 {
key, ok := values[i].(string)
if !ok {
return nil, fmt.Errorf("dict keys must be strings")
}
dict[key] = values[i+1]
}
return dict, nil
}
func hasKey(dict map[string]string, key string) bool {
if value, found := dict[key]; found {
return value != ""
}
return false
}
func truncate(str string, max int) string {
runes := 0
for i := range str {
runes++
if runes > max {
return str[:i] + "…"
}
}
return str
}
func isEmail(str string) bool {
_, err := mail.ParseAddress(str)
if err != nil {
return false
}
return true
}
func elapsedTime(printer *locale.Printer, tz string, t time.Time) string {
if t.IsZero() {
return printer.Printf("time_elapsed.not_yet")
}
now := timezone.Now(tz)
t = timezone.Convert(tz, t)
if now.Before(t) {
return printer.Printf("time_elapsed.not_yet")
}
diff := now.Sub(t)
// Duration in seconds
s := diff.Seconds()
// Duration in days
d := int(s / 86400)
switch {
case s < 60:
return printer.Printf("time_elapsed.now")
case s < 3600:
minutes := int(diff.Minutes())
return printer.Plural("time_elapsed.minutes", minutes, minutes)
case s < 86400:
hours := int(diff.Hours())
return printer.Plural("time_elapsed.hours", hours, hours)
case d == 1:
return printer.Printf("time_elapsed.yesterday")
case d < 21:
return printer.Plural("time_elapsed.days", d, d)
case d < 31:
weeks := int(math.Round(float64(d) / 7))
return printer.Plural("time_elapsed.weeks", weeks, weeks)
case d < 365:
months := int(math.Round(float64(d) / 30))
return printer.Plural("time_elapsed.months", months, months)
default:
years := int(math.Round(float64(d) / 365))
return printer.Plural("time_elapsed.years", years, years)
}
}
func imageProxyFilter(router *mux.Router, data string) string {
proxyImages := config.Opts.ProxyImages()
if proxyImages == "none" {
return data
}
doc, err := goquery.NewDocumentFromReader(strings.NewReader(data))
if err != nil {
return data
}
doc.Find("img").Each(func(i int, img *goquery.Selection) {
if srcAttr, ok := img.Attr("src"); ok {
if proxyImages == "all" || !url.IsHTTPS(srcAttr) {
img.SetAttr("src", proxify(router, srcAttr))
}
}
})
output, _ := doc.Find("body").First().Html()
return output
}
func proxify(router *mux.Router, link string) string {
// We use base64 url encoding to avoid slash in the URL.
return route.Path(router, "proxy", "encodedURL", base64.URLEncoding.EncodeToString([]byte(link)))
}
func formatFileSize(b int64) string {
const unit = 1024
if b < unit {
return fmt.Sprintf("%d B", b)
}
div, exp := int64(unit), 0
for n := b / unit; n >= unit; n /= unit {
div *= unit
exp++
}
return fmt.Sprintf("%.1f %ciB",
float64(b)/float64(div), "KMGTPE"[exp])
}
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