Add mock mode support and input validation

iridium_installer/ui/pages/user.py

@@ -1,14 +1,22 @@
+import re
+
 import gi
 
 gi.require_version("Gtk", "4.0")
 gi.require_version("Adw", "1")
-from gi.repository import Adw, Gtk
+from gi.repository import Adw, GObject, Gtk
 
 
 class UserPage(Adw.Bin):
+    __gsignals__ = {
+        "validity-changed": (GObject.SignalFlags.RUN_FIRST, None, (bool,)),
+    }
+
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
+        self._is_valid = False
+
         clamp = Adw.Clamp()
         clamp.set_maximum_size(500)
         self.set_child(clamp)
@@ -32,6 +40,7 @@ class UserPage(Adw.Bin):
         self.fullname_row.set_title("Full Name")
         self.fullname_row.set_text("Administrator")
         self.fullname_row.connect("notify::text", self.on_fullname_changed)
+        self.fullname_row.connect("notify::text", self.on_input_changed)
         group.add(self.fullname_row)
 
         self.username_row = Adw.EntryRow()
@@ -40,14 +49,17 @@ class UserPage(Adw.Bin):
         self.username_handler_id = self.username_row.connect(
             "notify::text", self.on_username_changed
         )
+        self.username_row.connect("notify::text", self.on_input_changed)
         group.add(self.username_row)
 
         self.password_row = Adw.PasswordEntryRow()
         self.password_row.set_title("Password")
+        self.password_row.connect("notify::text", self.on_input_changed)
         group.add(self.password_row)
 
         self.confirm_row = Adw.PasswordEntryRow()
         self.confirm_row.set_title("Confirm Password")
+        self.confirm_row.connect("notify::text", self.on_input_changed)
         group.add(self.confirm_row)
 
         # Hostname
@@ -58,10 +70,14 @@ class UserPage(Adw.Bin):
         self.hostname_row = Adw.EntryRow()
         self.hostname_row.set_title("Hostname")
         self.hostname_row.set_text("iridium")
+        self.hostname_row.connect("notify::text", self.on_input_changed)
         host_group.add(self.hostname_row)
 
         self.username_manually_set = False
 
+        # Initial validation
+        self.validate()
+
     def on_fullname_changed(self, entry, _pspec):
         if self.username_manually_set:
             return
@@ -113,6 +129,53 @@ class UserPage(Adw.Bin):
     def on_username_changed(self, entry, _pspec):
         self.username_manually_set = True
 
+    def on_input_changed(self, *args):
+        self.validate()
+
+    def validate(self):
+        valid = True
+
+        # Username validation
+        username = self.username_row.get_text()
+        if not username:
+            valid = False
+            self.username_row.add_css_class("error")
+        elif not re.match(r"^[a-z_][a-z0-9_-]*$", username):
+            valid = False
+            self.username_row.add_css_class("error")
+        else:
+            self.username_row.remove_css_class("error")
+
+        # Password validation
+        pw = self.password_row.get_text()
+        confirm = self.confirm_row.get_text()
+
+        if not pw:
+            valid = False
+            # Don't show error for empty password initially, just invalidate
+            # It looks a lot nicer like that
+
+        if pw != confirm:
+            valid = False
+            self.confirm_row.add_css_class("error")
+        else:
+            self.confirm_row.remove_css_class("error")
+
+        # Hostname validation
+        hostname = self.hostname_row.get_text()
+        if not hostname:
+            valid = False
+            self.hostname_row.add_css_class("error")
+        else:
+            self.hostname_row.remove_css_class("error")
+
+        if self._is_valid != valid:
+            self._is_valid = valid
+            self.emit("validity-changed", valid)
+
+    def is_valid(self):
+        return self._is_valid
+
     def get_user_info(self):
         return {
             "fullname": self.fullname_row.get_text(),