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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package static // import "miniflux.app/v2/internal/ui/static"
import (
"bytes"
"embed"
"log/slog"
"slices"
"strings"
"miniflux.app/v2/internal/crypto"
"github.com/tdewolff/minify/v2"
"github.com/tdewolff/minify/v2/css"
"github.com/tdewolff/minify/v2/js"
"github.com/tdewolff/minify/v2/svg"
)
type asset struct {
Data []byte
Checksum string
}
// Static assets.
var (
StylesheetBundles map[string]asset
JavascriptBundles map[string]asset
BinaryBundles map[string]asset
)
//go:embed bin/*
var binaryFiles embed.FS
//go:embed css/*.css
var stylesheetFiles embed.FS
//go:embed js/*.js
var javascriptFiles embed.FS
func GenerateBinaryBundles() error {
dirEntries, err := binaryFiles.ReadDir("bin")
if err != nil {
return err
}
BinaryBundles = make(map[string]asset, len(dirEntries))
minifier := minify.New()
minifier.Add("image/svg+xml", &svg.Minifier{
KeepComments: true, // needed to keep the license
})
for _, dirEntry := range dirEntries {
name := dirEntry.Name()
data, err := binaryFiles.ReadFile("bin/" + name)
if err != nil {
return err
}
if strings.HasSuffix(name, ".svg") {
// minifier.Bytes returns the data unchanged in case of error.
data, err = minifier.Bytes("image/svg+xml", data)
if err != nil {
slog.Error("Unable to minimize the svg file", slog.String("filename", name), slog.Any("error", err))
}
}
BinaryBundles[name] = asset{
Data: data,
Checksum: crypto.HashFromBytes(data),
}
}
return nil
}
// GenerateStylesheetsBundles creates CSS bundles.
func GenerateStylesheetsBundles() error {
var bundles = map[string][]string{
"light_serif": {"css/light.css", "css/serif.css", "css/common.css"},
"light_sans_serif": {"css/light.css", "css/sans_serif.css", "css/common.css"},
"dark_serif": {"css/dark.css", "css/serif.css", "css/common.css"},
"dark_sans_serif": {"css/dark.css", "css/sans_serif.css", "css/common.css"},
"system_serif": {"css/system.css", "css/serif.css", "css/common.css"},
"system_sans_serif": {"css/system.css", "css/sans_serif.css", "css/common.css"},
}
StylesheetBundles = make(map[string]asset, len(bundles))
minifier := minify.New()
minifier.AddFunc("text/css", css.Minify)
for bundle, srcFiles := range bundles {
var buffer bytes.Buffer
for _, srcFile := range srcFiles {
fileData, err := stylesheetFiles.ReadFile(srcFile)
if err != nil {
return err
}
buffer.Write(fileData)
}
minifiedData, err := minifier.Bytes("text/css", buffer.Bytes())
if err != nil {
return err
}
StylesheetBundles[bundle] = asset{
Data: minifiedData,
Checksum: crypto.HashFromBytes(minifiedData),
}
}
return nil
}
// GenerateJavascriptBundles creates JS bundles.
func GenerateJavascriptBundles(webauthnEnabled bool) error {
var bundles = map[string][]string{
"app": {
"js/touch_handler.js",
"js/keyboard_handler.js",
"js/app.js",
},
"service-worker": {
"js/service_worker.js",
},
}
if webauthnEnabled {
bundles["app"] = slices.Insert(bundles["app"], 1, "js/webauthn_handler.js")
}
JavascriptBundles = make(map[string]asset, len(bundles))
jsMinifier := js.Minifier{Version: 2020}
minifier := minify.New()
minifier.AddFunc("text/javascript", jsMinifier.Minify)
for bundle, srcFiles := range bundles {
var buffer bytes.Buffer
for _, srcFile := range srcFiles {
fileData, err := javascriptFiles.ReadFile(srcFile)
if err != nil {
return err
}
buffer.Write(fileData)
}
minifiedData, err := minifier.Bytes("text/javascript", buffer.Bytes())
if err != nil {
return err
}
JavascriptBundles[bundle] = asset{
Data: minifiedData,
Checksum: crypto.HashFromBytes(minifiedData),
}
}
return nil
}
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