move some files around and create a context manager for fit recalclation

gui/fitCommands/calc/fitAddModule.py

@@ -0,0 +1,70 @@
+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 FitAddModuleCommand(wx.Command):
+    """"
+    Fitting command that appends a module to a fit using the first available slot.
+
+    from sFit.appendModule
+    """
+    def __init__(self, fitID, itemID):
+        wx.Command.__init__(self, True, "Module Add")
+        self.fitID = fitID
+        self.itemID = itemID
+        self.new_position = None
+        self.change = None
+
+    def Do(self):
+        fitID = self.fitID
+        itemID = self.itemID
+        pyfalog.debug("Appending module for fit ({0}) using item: {1}", fitID, itemID)
+        fit = eos.db.getFit(fitID)
+        item = eos.db.getItem(itemID, eager=("attributes", "group.category"))
+
+        try:
+            self.module = Module(item)
+        except ValueError:
+            pyfalog.warning("Invalid item: {0}", itemID)
+            return False
+
+        if self.module.item.category.name == "Subsystem":
+            fit.modules.freeSlot(self.module.getModifiedItemAttr("subSystemSlot"))
+
+        if self.module.fits(fit):
+            self.module.owner = fit
+            numSlots = len(fit.modules)
+            fit.modules.append(self.module)
+            if self.module.isValidState(State.ACTIVE):
+                self.module.state = State.ACTIVE
+
+            # todo: fix these
+            # As some items may affect state-limiting attributes of the ship, calculate new attributes first
+            # self.recalc(fit)
+            # Then, check states of all modules and change where needed. This will recalc if needed
+            # self.checkStates(fit, m)
+
+            fit.fill()
+            eos.db.commit()
+
+            self.change = numSlots != len(fit.modules)
+            self.new_position = self.module.modPosition
+        else:
+            return False
+
+        return True
+
+    def Undo(self):
+        from .fitRemoveModule import FitRemoveModuleCommand  # Avoid circular import
+        if self.new_position:
+            cmd = FitRemoveModuleCommand(self.fitID, [self.new_position])
+            cmd.Do()
+        return True