Add events for slicing profile manipulation

Events SlicingProfile(Added|Modified|Deleted). Initially thought to be necessary
to properly refresh available profiles in slicing dialog, not needed for that after
all but still left in and documented, might be useful for someone.

docs/events/index.rst

@@ -365,6 +365,30 @@ SlicingFailed
      * ``gcode``: the sliced GCODE's filename
      * ``reason``: the reason for the slicing having failed
 
+SlicingProfileAdded
+   A new slicing profile was added.
+
+   Payload:
+
+     * ``slicer``: the slicer for which the profile was added
+     * ``profile``: the profile that was added
+
+SlicingProfileModified
+   A new slicing profile was modified.
+
+   Payload:
+
+     * ``slicer``: the slicer for which the profile was modified
+     * ``profile``: the profile that was modified
+
+SlicingProfileDeleted
+   A slicing profile was deleted.
+
+   Payload:
+
+     * ``slicer``: the slicer for which the profile was deleted
+     * ``profile``: the profile that was deleted
+
 Settings
 --------
 

src/octoprint/events.py

@@ -86,6 +86,14 @@ class Events(object):
 	SLICING_DONE = "SlicingDone"
 	SLICING_FAILED = "SlicingFailed"
 	SLICING_CANCELLED = "SlicingCancelled"
+	SLICING_PROFILE_ADDED = "SlicingProfileAdded"
+	SLICING_PROFILE_MODIFIED = "SlicingProfileModified"
+	SLICING_PROFILE_DELETED = "SlicingProfileDeleted"
+
+	# Printer Profiles
+	PRINTER_PROFILE_ADDED = "PrinterProfileAdded"
+	PRINTER_PROFILE_MODIFIED = "PrinterProfileModified"
+	PRINTER_PROFILE_DELETED = "PrinterProfileDeleted"
 
 	# Settings
 	SETTINGS_UPDATED = "SettingsUpdated"

src/octoprint/plugins/cura/__init__.py

@@ -191,9 +191,6 @@ def get_slicer_profile(self, path):
 		return octoprint.slicing.SlicingProfile(properties["type"], "unknown", profile_dict, display_name=display_name, description=description)
 
 	def save_slicer_profile(self, path, profile, allow_overwrite=True, overrides=None):
-		if os.path.exists(path) and not allow_overwrite:
-			raise octoprint.slicing.ProfileAlreadyExists("cura", profile.name)
-
 		new_profile = Profile.merge_profile(profile.data, overrides=overrides)
 
 		if profile.display_name is not None:

src/octoprint/server/api/slicing.py

@@ -14,7 +14,7 @@
 
 from octoprint.settings import settings as s, valid_boolean_trues
 
-from octoprint.slicing import UnknownSlicer, SlicerNotConfigured, ProfileAlreadyExists, UnknownProfile
+from octoprint.slicing import UnknownSlicer, SlicerNotConfigured, ProfileAlreadyExists, UnknownProfile, CouldNotDeleteProfile
 
 
 @api.route("/slicing", methods=["GET"])
@@ -147,6 +147,8 @@ def slicingDelSlicerProfile(slicer, name):
 		slicingManager.delete_profile(slicer, name)
 	except UnknownSlicer:
 		return make_response("Unknown slicer {slicer}".format(**locals()), 404)
+	except CouldNotDeleteProfile as e:
+		return make_response("Could not delete profile {profile} for slicer {slicer}: {cause}".format(profile=name, slicer=slicer, cause=str(e.cause)), 500)
 
 	return NO_CONTENT
 

src/octoprint/slicing/__init__.py

@@ -407,7 +407,18 @@ def save_profile(self, slicer, name, profile, overrides=None, allow_overwrite=Tr
 				profile.description = description
 
 		path = self.get_profile_path(slicer, name)
+		is_overwrite = os.path.exists(path)
+
+		if is_overwrite and not allow_overwrite:
+			raise ProfileAlreadyExists(slicer, profile.name)
+
 		self._save_profile_to_path(slicer, path, profile, overrides=overrides, allow_overwrite=allow_overwrite)
+
+		payload = dict(slicer=slicer,
+		               profile=name)
+		event = octoprint.events.Events.SLICING_PROFILE_MODIFIED if is_overwrite else octoprint.events.Events.SLICING_PROFILE_ADDED
+		octoprint.events.eventManager().fire(event, payload)
+
 		return profile
 
 	def _temporary_profile(self, slicer, name=None, overrides=None):
@@ -436,6 +447,7 @@ def delete_profile(self, slicer, name):
 
 		Raises:
 		    ~octoprint.slicing.exceptions.UnknownSlicer: The slicer ``slicer`` is unknown.
+		    ~octoprint.slicing.exceptions.CouldNotDeleteProfile: There was an error while deleting the profile.
 		"""
 
 		if not slicer in self.registered_slicers:
@@ -445,10 +457,17 @@ def delete_profile(self, slicer, name):
 			raise ValueError("name must be set")
 
 		try:
-			path = self.get_profile_path(slicer, name, must_exist=True)
-		except UnknownProfile:
-			return
-		os.remove(path)
+			try:
+				path = self.get_profile_path(slicer, name, must_exist=True)
+			except UnknownProfile:
+				return
+			os.remove(path)
+		except ProfileException as e:
+			raise e
+		except Exception as e:
+			raise CouldNotDeleteProfile(slicer, name, cause=e)
+		else:
+			octoprint.events.eventManager().fire(octoprint.events.Events.SLICING_PROFILE_DELETED, dict(slicer=slicer, profile=name))
 
 	def all_profiles(self, slicer, require_configured=False):
 		"""

src/octoprint/slicing/exceptions.py

@@ -105,3 +105,16 @@ class ProfileAlreadyExists(ProfileException):
 	def __init__(self, slicer, profile, *args, **kwargs):
 		ProfileException.__init__(self, slicer, profile, *args, **kwargs)
 		self.message = "Profile {profile} for slicer {slicer} already exists".format(profile=profile, slicer=slicer)
+
+class CouldNotDeleteProfile(ProfileException):
+	"""
+	Raised if there is an unexpected error trying to delete a known profile.
+	"""
+	def __init__(self, slicer, profile, cause=None, *args, **kwargs):
+		ProfileException.__init__(self, slicer, profile, *args, **kwargs)
+
+		self.cause = cause
+		if cause:
+			self.message = "Could not delete profile {profile} for slicer {slicer}: {cause}".format(profile=profile, slicer=slicer, cause=str(cause))
+		else:
+			self.message = "Could not delete profile {profile} for slicer {slicer}".format(profile=profile, slicer=slicer)