Start refactoring the refactor that was started with command pattern refactoring.

Instead of attempting to keep all the Fit service functionality, move these into specific "Fitting Commands" that are designed to define a unit of work and it's undo. Then, we will have "GUI Commands" which are defined as actions taken by the user themselves - these will usually use one or more "Fitting Commands".

gui/fitCommands/fitRemoveModule.py

@@ -0,0 +1,57 @@
+import wx
+from service.fit import Fit
+
+import gui.mainFrame
+from gui import globalEvents as GE
+from .helpers import ModuleInfoCache
+from eos.saveddata.module import Module, State
+import eos.db
+from logbook import Logger
+pyfalog = Logger(__name__)
+
+
+class FitRemoveModuleCommand(wx.Command):
+    """"
+    Fitting command that removes a module at a specified positions
+
+    from sFit.removeModule
+    """
+    def __init__(self, fitID: int, positions: list = None):
+        wx.Command.__init__(self, True, "Module Remove")
+        self.fitID = fitID
+        self.positions = positions
+        self.modCache = []
+        self.change = None
+
+    def Do(self):
+        fitID = self.fitID
+        pyfalog.debug("Removing module from position ({0}) for fit ID: {1}", self.positions, fitID)
+        fit = eos.db.getFit(fitID)
+
+        for x in self.positions:
+            mod = fit.modules[x]
+            if not mod.isEmpty:
+                self.modCache.append(ModuleInfoCache(mod.modPosition, mod.item.ID, mod.state, mod.charge))
+                fit.modules.toDummy(x)
+
+        # if no modules have changes, report back None
+        if not len(self.modCache) > 0:
+            return False
+
+        numSlots = len(fit.modules)
+        # todo: determine if we need to do this still
+        # self.recalc(fit)
+        # self.checkStates(fit, None)
+        fit.fill()
+        eos.db.commit()
+        self.slotsChanged = numSlots != len(fit.modules)
+        return True
+
+    def Undo(self):
+        from .fitAddModule import FitAddModuleCommand  # avoids circular import
+        for mod in self.modCache:
+            cmd = FitAddModuleCommand(self.fitID, mod.itemID)
+            cmd.Do()
+            cmd.module.state = mod.state
+            cmd.module.charge = mod.charge
+        return True