Rework import keys pass confirmation

- Show button as loading until the import is done, *then* close popup
- Remove the dedicated backend password checking function, we can use
  import_keys() directly now
- Handle all the possible errors that could be thrown from python

src/python/backend.py

@@ -141,29 +141,6 @@ class Backend:
         return nio.Api.mxc_to_http(mxc)
 
 
-    @staticmethod
-    async def check_exported_keys_passphrase(file_path: str, passphrase: str,
-                                            ) -> Union[bool, Tuple[str, bool]]:
-        """Check if the exported keys file can be decrypted with passphrase.
-
-        Returns True on success, False is the passphrase is invalid, or
-        an (error_message, error_is_translated) tuple if another error occured.
-        """
-
-        try:
-            nio.crypto.key_export.decrypt_and_read(file_path, passphrase)
-            return True
-
-        except OSError as err:  # XXX raise
-            return (f"{file_path}: {err.strerror}", True)
-
-        except ValueError as err:  # XXX raise
-            if str(err).startswith("HMAC check failed"):
-                return False
-
-            return (str(err), False)
-
-
     async def load_settings(self) -> tuple:
         from .config_files import Theme
         settings = await self.ui_settings.read()

src/qml/Dialogs/ExportKeys.qml

@@ -12,6 +12,8 @@ HFileDialogOpener {
     }
 
 
+    // This is used for the LogoutPopup to know when the export is done
+    // so it can close
     signal done()
 
 

src/qml/Dialogs/ImportKeys.qml

@@ -11,24 +11,10 @@ HFileDialogOpener {
     }
 
 
-    signal done()
-
-
     property string userId: ""
     property bool importing: false
 
 
-    function importKeys(file, passphrase) {
-        importing = true
-
-        let path = file.toString().replace(/^file:\/\//, "")
-        py.callClientCoro(userId, "import_keys", [path, passphrase], () => {
-            importing = false
-            done()
-        })
-    }
-
-
     PasswordPopup {
         id: importPasswordPopup
         details.text: qsTr(
@@ -36,16 +22,38 @@ HFileDialogOpener {
         )
         okText: qsTr("Import")
 
-        onAcceptedPasswordChanged: importKeys(file, acceptedPassword)
 
         property url file: ""
 
+
         function verifyPassword(pass, callback) {
-            py.callCoro(
-                "check_exported_keys_passphrase",
-                [file.toString().replace(/^file:\/\//, ""), pass],
-                callback
-            )
+            importing = true
+            let path  = file.toString().replace(/^file:\/\//, "")
+
+            py.callClientCoro(userId, "import_keys", [path, pass], () => {
+                importing = false
+                callback(true)
+
+            }, (type, args) => {
+                callback(
+                    type === "EncryptionError" ?
+                    false :
+
+                    type === "ValueError" ?
+                    qsTr("Invalid file format") :
+
+                    type === "FileNotFoundError" ?
+                    qsTr("This file doesn't exist") :
+
+                    type === "IsADirectoryError" ?
+                    qsTr("A folder was given, expecting a file") :
+
+                    type === "PermissionError" ?
+                    qsTr("No permission to read this file") :
+
+                    qsTr("Unknown error: %1 - %2").arg(type).arg(args)
+                )
+            })
         }
     }
 }

src/qml/Popups/PasswordPopup.qml

@@ -25,8 +25,8 @@ BoxPopup {
 
     function verifyPassword(pass, callback) {
         // Can be reimplemented when using this component.
-        // Pass to the callback true on success, false on invalid password, or
-        // a [error message, translated] array for any other error.
+        // Pass to the callback true on success, false on invalid password,
+        // or a custom error message string.
         callback(true)
     }
 
@@ -46,8 +46,7 @@ BoxPopup {
                 } else if (result === false) {
                     passwordValid = false
                 } else {
-                    let [msg, translated] = result
-                    errorMessage.text     = translated ? msg : qsTr(msg)
+                    errorMessage.text = result
                 }
 
                 button.loading = false