WizardPlugins can now report back more details

In case a wizard plugin needs to communicate more info with its frontend,
such as which kind of information is missing, this is now possible through
a new API endpoint that will collect such information from the plugins
and provide it to callees.

src/octoprint/plugin/__init__.py

@@ -103,7 +103,8 @@ def plugin_manager(init=False, plugin_folders=None, plugin_types=None, plugin_en
 				                EventHandlerPlugin,
 				                SlicerPlugin,
 				                AppPlugin,
-				                ProgressPlugin]
+				                ProgressPlugin,
+				                WizardPlugin]
 			if plugin_entry_points is None:
 				plugin_entry_points = "octoprint.plugin"
 			if plugin_disabled_list is None:

src/octoprint/plugin/types.py

@@ -455,6 +455,9 @@ class WizardPlugin(OctoPrintPlugin, ReloadNeedingPlugin):
 	def is_wizard_required(self):
 		return False
 
+	def get_wizard_details(self):
+		return dict()
+
 
 class SimpleApiPlugin(OctoPrintPlugin):
 	"""

src/octoprint/server/api/__init__.py

@@ -98,6 +98,24 @@ def pluginCommand(name):
 
 #~~ first run setup
 
+@api.route("/setup/wizard", methods=["GET"])
+def wizardState():
+	if not s().getBoolean(["server", "firstRun"]) and not admin_permission.can():
+		abort(403)
+
+	result = dict()
+	wizard_plugins = octoprint.server.pluginManager.get_implementations(octoprint.plugin.WizardPlugin)
+	for implementation in wizard_plugins:
+		name = implementation._identifier
+		try:
+			required = implementation.is_wizard_required()
+			details = implementation.get_wizard_details()
+		except:
+			logging.getLogger(__name__).exception("There was an error fetching wizard details for {}, ignoring".format(name))
+		else:
+			result[name] = dict(required=required, details=details)
+
+	return jsonify(result)
 
 @api.route("/setup", methods=["POST"])
 def firstRunSetup():