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file.go
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file.go
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//Package clientzip provides clientside zipping functionality.
package clientzip
import (
"fmt"
"strconv"
"qlova.org/seed"
"qlova.org/seed/client"
"qlova.org/seed/client/clientside"
"qlova.org/seed/new/dropzone"
"qlova.org/seed/use/js"
)
//Policy determines what is zipped.
type Policy int
func (p Policy) String() string {
switch p {
case Always:
return "always"
case FoldersOnly:
return "folders"
}
return ""
}
//Policies.
const (
//File is always zipped.
Always Policy = iota
//Only Folders are zipped, if a File is set to a single file, it will be left as is.
FoldersOnly
)
//File is a (potentially zipped) file in client memory.
type File struct {
clientside.File
ZipPolicy Policy
//WhenZippingSet sets the file to set the given boolean when it is being zipped.
WhenZippingSet *clientside.Bool
}
//Choose asks the client to choose a File.
func (f *File) Choose() client.Script {
return js.Script(func(q js.Ctx) {
q(`"'#(import "/jszip.js")`)
var input = js.Global().Get("document").Call("createElement", js.NewString("input")).Var(q)
q(input.Set("type", js.NewString("file")))
q(input.Run("setAttribute", js.NewString("multiple"), js.NewString("")))
q(input.Run("setAttribute", js.NewString("directory"), js.NewString("")))
q(input.Run("setAttribute", js.NewString("webkitdirectory"), js.NewString("")))
q(input.Run("setAttribute", js.NewString("allowdirs"), js.NewString("")))
q("let active = seed.active;")
q(input.Set("oninput", js.NewFunction(func(q js.Ctx) {
q(js.Global().Get("seed").Set("active", js.NewValue(`active`)))
if f.WhenZippingSet != nil {
q(f.WhenZippingSet.Set(true))
}
fmt.Fprintf(q, `
let file;
var target = event.target;
if (target.files && target.files.length) {
file = await clientzip.WebkitRelativePaths(target, %[1]v);
} else if ("getFilesAndDirectories" in target) {
file = await FilesAndDirectories(target, %[1]v);
} else if (event.file) {
if (%[1]v == "folders") file = target.files[0];
}
`, strconv.Quote(f.ZipPolicy.String()))
if f.WhenZippingSet != nil {
q(f.WhenZippingSet.Set(false))
}
q(f.SetToRaw(js.Null()))
q(f.SetToRaw(js.NewValue("file")))
}, "event")))
q(input.Run("click"))
})
}
//Dropzone sets the seed to act as a dropzone for this file.
func (f *File) Dropzone() seed.Option {
return seed.Options{
js.Require("/jszip.js", jszip),
client.On("dragenter", js.Script(func(q js.Ctx) {
q(`arguments[0].preventDefault();`)
})),
client.On("dragover", js.Script(func(q js.Ctx) {
q(`arguments[0].preventDefault();`)
})),
dropzone.OnDrop(js.Script(func(q js.Ctx) {
if f.WhenZippingSet != nil {
q(f.WhenZippingSet.Set(true))
}
fmt.Fprintf(q, `{
let event = arguments[0];
event.preventDefault();
event.stopPropagation();
let dt = event.dataTransfer;
let file;
let name;
if (dt.items && dt.items.length && "webkitGetAsEntry" in dt.items[0] && dt.items[0].webkitGetAsEntry()) {
file = await clientzip.AsEntries(dt.items, %[1]v);
} else if ("getFilesAndDirectories" in dt) {
file = await clientzip.FilesAndDirectories(dt, %[1]v);
} else if (dt.files) {
file = await clientzip.WebkitRelativePaths(dt, %[1]v);
} else if (event.file) {
if (%[1]v == "folders") file = event.file;
}
`, strconv.Quote(f.ZipPolicy.String()))
if f.WhenZippingSet != nil {
q(f.WhenZippingSet.Set(false))
}
q(f.SetToRaw(js.Null()))
q(f.SetToRaw(js.NewValue("file")))
q("}")
})),
}
}