[gui] Add logic for new contract form

gui/config/pwddialog.go

+package config
+
+import (
+	"errors"
+	"io/ioutil"
+
+	"dfss/auth"
+	"github.com/visualfc/goqt/ui"
+)
+
+// PasswordDialog checks the current private key for any passphrase.
+// If the key is protected, it spawns an inputDialog window to ask the user's passphrase,
+// and then calls the callback function with the result.
+//
+// The callback is always called, even when an error occurs.
+func PasswordDialog(callback func(err error, pwd string)) {
+	// Try to get private key
+	path := GetHomeDir() + KeyFile
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		callback(err, "")
+		return
+	}
+
+	if !auth.IsPEMEncrypted(data) {
+		callback(nil, "")
+		return
+	}
+
+	dialog := ui.NewInputDialog()
+	dialog.SetWindowTitle("Encrypted private key")
+	dialog.SetLabelText("Please type your password to proceed:")
+	dialog.SetTextEchoMode(ui.QLineEdit_Password)
+
+	dialog.OnRejected(func() {
+		callback(errors.New("user rejected"), "")
+	})
+
+	dialog.OnAccepted(func() {
+		pwd := dialog.TextValue()
+		if pwd == "" {
+			pwd = " " // doing this to force the "wrong password" error msg
+		}
+		callback(nil, pwd)
+	})
+
+	dialog.Open()
+}

gui/contractform/contractform.go

 package contractform
 
 import (
+	"strings"
+
+	"dfss/dfssc/sign"
 	"dfss/gui/config"
 	"github.com/visualfc/goqt/ui"
 )
 
 type Widget struct {
 	*ui.QWidget
+
+	signers *ui.QPlainTextEdit
 }
 
 func NewWidget(conf *config.Config) *Widget {
@@ -14,5 +19,70 @@ func NewWidget(conf *config.Config) *Widget {
 	loader := ui.NewUiLoader()
 	form := loader.Load(file)
 
-	return &Widget{QWidget: form}
+	fileField := ui.NewLineEditFromDriver(form.FindChild("fileField"))
+	commentField := ui.NewPlainTextEditFromDriver(form.FindChild("commentField"))
+	signersField := ui.NewPlainTextEditFromDriver(form.FindChild("signersField"))
+	fileButton := ui.NewPushButtonFromDriver(form.FindChild("fileButton"))
+	createButton := ui.NewPushButtonFromDriver(form.FindChild("createButton"))
+	feedbackLabel := ui.NewLabelFromDriver(form.FindChild("feedbackLabel"))
+
+	w := &Widget{
+		QWidget: form,
+		signers: signersField,
+	}
+
+	signersField.SetPlainText(conf.Email + "\n")
+
+	fileButton.OnClicked(func() {
+		filter := "Any (*.*)"
+		filename := ui.QFileDialogGetOpenFileNameWithParentCaptionDirFilterSelectedfilterOptions(form, "Select contract file", config.GetHomeDir(), filter, &filter, 0)
+		fileField.SetText(filename)
+	})
+
+	createButton.OnClicked(func() {
+		form.SetDisabled(true)
+		feedbackLabel.SetText("Please wait...")
+		config.PasswordDialog(func(err error, pwd string) {
+			if err != nil {
+				form.SetDisabled(false)
+				feedbackLabel.SetText("Aborted.")
+				return // wrong key or rejection, aborting
+			}
+
+			home := config.GetHomeDir()
+			err = sign.SendNewContract(
+				home+config.CAFile,
+				home+config.CertFile,
+				home+config.KeyFile,
+				conf.Platform,
+				pwd,
+				fileField.Text(),
+				commentField.ToPlainText(),
+				w.SignersList(),
+			)
+
+			if err != nil {
+				feedbackLabel.SetText(err.Error())
+			} else {
+				feedbackLabel.SetText("Contract successfully sent to signers!")
+				fileField.SetText("")
+			}
+			form.SetDisabled(false)
+		})
+	})
+
+	return w
+}
+
+func (w *Widget) SignersList() (list []string) {
+	rawList := strings.Split(w.signers.ToPlainText(), "\n")
+
+	for _, e := range rawList {
+		clean := strings.TrimSpace(e)
+		if clean != "" {
+			list = append(list, clean)
+		}
+	}
+
+	return
 }

gui/contractform/contractform.ui

@@ -68,6 +68,9 @@
         <layout class="QHBoxLayout" name="horizontalLayout">
          <item>
           <widget class="QLineEdit" name="fileField">
+           <property name="focusPolicy">
+            <enum>Qt::NoFocus</enum>
+           </property>
            <property name="readOnly">
             <bool>true</bool>
            </property>
@@ -88,7 +91,7 @@
        <item row="1" column="0">
         <widget class="QLabel" name="signersLabel">
          <property name="text">
-          <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Signers&lt;br/&gt;&lt;/span&gt;&lt;span style=&quot; font-size:8pt; font-style:italic;&quot;&gt;Space-separated&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+          <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Signers&lt;br/&gt;&lt;/span&gt;&lt;span style=&quot; font-size:8pt; font-style:italic;&quot;&gt;One per line&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
         </widget>
        </item>
@@ -115,7 +118,7 @@
          </property>
         </widget>
        </item>
-       <item row="4" column="1">
+       <item row="3" column="1">
         <widget class="QLabel" name="feedbackLabel">
          <property name="text">
           <string/>