forked from coyim/coyim
/
forms.go
178 lines (163 loc) · 4.26 KB
/
forms.go
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package xmpp implements the XMPP IM protocol, as specified in RFC 6120 and
// 6121.
package xmpp
import (
"encoding/base64"
"fmt"
"strings"
"github.com/twstrike/coyim/xmpp/data"
)
// processForm calls the callback with the given XMPP form and returns the
// result form. The datas argument contains any additional XEP-0231 blobs that
// might contain media for the questions in the form.
func processForm(form *data.Form, datas []data.BobData, callback data.FormCallback) (*data.Form, error) {
var fields []interface{}
for _, field := range form.Fields {
base := data.FormField{
Label: field.Label,
Type: field.Type,
Name: field.Var,
Required: field.Required != nil,
}
for _, media := range field.Media {
var options []data.Media
for _, uri := range media.URIs {
media := data.Media{
MIMEType: uri.MIMEType,
URI: uri.URI,
}
if strings.HasPrefix(media.URI, "cid:") {
// cid URIs are references to data
// blobs that, hopefully, were sent
// along with the form.
cid := media.URI[4:]
media.URI = ""
for _, data := range datas {
if data.CID == cid {
var err error
if media.Data, err = base64.StdEncoding.DecodeString(data.Base64); err != nil {
media.Data = nil
}
}
}
}
if len(media.URI) > 0 || len(media.Data) > 0 {
options = append(options, media)
}
}
base.Media = append(base.Media, options)
}
switch field.Type {
case "fixed":
if len(field.Values) < 1 {
continue
}
f := &data.FixedFormField{
FormField: base,
Text: field.Values[0],
}
fields = append(fields, f)
case "boolean":
f := &data.BooleanFormField{
FormField: base,
}
fields = append(fields, f)
case "jid-multi", "text-multi":
f := &data.MultiTextFormField{
FormField: base,
Defaults: field.Values,
}
fields = append(fields, f)
case "list-single":
f := &data.SelectionFormField{
FormField: base,
}
for _, opt := range field.Options {
f.Ids = append(f.Ids, opt.Value)
f.Values = append(f.Values, opt.Label)
}
fields = append(fields, f)
case "list-multi":
f := &data.MultiSelectionFormField{
FormField: base,
}
for _, opt := range field.Options {
f.Ids = append(f.Ids, opt.Value)
f.Values = append(f.Values, opt.Label)
}
fields = append(fields, f)
case "hidden":
continue
default:
f := &data.TextFormField{
FormField: base,
Private: field.Type == "text-private",
}
if len(field.Values) > 0 {
f.Default = field.Values[0]
}
fields = append(fields, f)
}
}
if err := callback(form.Title, form.Instructions, fields); err != nil {
return nil, err
}
result := &data.Form{
Type: "submit",
}
// Copy the hidden fields across.
for _, field := range form.Fields {
if field.Type != "hidden" {
continue
}
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Var,
Values: field.Values,
})
}
for _, field := range fields {
switch field := field.(type) {
case *data.BooleanFormField:
value := "false"
if field.Result {
value = "true"
}
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Name,
Values: []string{value},
})
case *data.TextFormField:
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Name,
Values: []string{field.Result},
})
case *data.MultiTextFormField:
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Name,
Values: field.Results,
})
case *data.SelectionFormField:
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Name,
Values: []string{field.Ids[field.Result]},
})
case *data.MultiSelectionFormField:
var values []string
for _, selected := range field.Results {
values = append(values, field.Ids[selected])
}
result.Fields = append(result.Fields, data.FormFieldX{
Var: field.Name,
Values: values,
})
case *data.FixedFormField:
continue
default:
panic(fmt.Sprintf("unknown field type in result from callback: %T", field))
}
}
return result, nil
}