Refactor/filament tab logic (#207)

# Description 

Select the type:  
- [x] Feature  
- [ ] Bug fix  
- [ ] Code refactor  
- [ ] Documentation

**BlocksScreen/lib/ui/filamentStackedWidget.ui** and
**BlocksScreen/lib/ui/filamentStackedWidget_ui.py**
- Removed filament name space

**BlocksScreen.cfg**
- Added filament_presence 

**BlocksScreen/lib/panels/filamentTab.py**
- Added more filament to Filament Type 
- Added saving current filament into variables.cfg 
- Refactor loaded / unloaded logic so it only uses the sensor explicetd
on BlocksScreen.cfg
- Added back button incase its printing and the user wants to go back 
- Updated Messages 


**BlocksScreen/lib/panels/mainWindow.py** 
- Added global_change_tab method 
- Added if the machine priting indexes arent reseted 
- Unlocked Filament tab when priting 
- Unblocked filament button on topbar mid print

**BlocksScreen/lib/panels/printTab.py**
- Connected change filament button to go to filament tab mid print

**BlocksScreen/lib/printer.py**
- Added _save_variables_object_updated to emit variables.cfg
- Updated on_load and on_unload signals

---------

Co-authored-by: Roberto Martins <roberto.martins@blockstec.com>
Co-authored-by: HugoCLSC <hugo.santos.costa@gmail.com>

Author: 3 people

BlocksScreen.cfg

@@ -7,3 +7,7 @@ timeout: 5000
 
 [usb_manager]
 gcodes_dir: ~/printer_data/gcodes/
+
+[filament_presence]
+object: cutter_sensor
+name: extruder_cutter 

BlocksScreen/lib/panels/filamentTab.py

@@ -1,27 +1,36 @@
 import enum
 from functools import partial
 
-
+import logging
 from lib.printer import Printer
 from lib.filament import Filament
 from lib.ui.filamentStackedWidget_ui import Ui_filamentStackedWidget
-
 from lib.panels.widgets.popupDialogWidget import Popup
 from PyQt6 import QtCore, QtGui, QtWidgets
 
+logger = logging.getLogger(__name__)
+
+
+class FilamentTypes(enum.Enum):
+    PLA = Filament(name="PLA", temperature=220)
+    PETG = Filament(name="PETG", temperature=240)
+    ABS = Filament(name="ABS", temperature=250)
+    HIPS = Filament(name="HIPS", temperature=250)
+    NYLON = Filament(name="NYLON", temperature=270)
+    TPU = Filament(name="TPU", temperature=230)
+    UNKNOWN = Filament(name="UNKNOWN", temperature=250)
+
 
 class FilamentTab(QtWidgets.QStackedWidget):
     request_filament_change_page = QtCore.pyqtSignal(name="filament_change_page")
     request_filament_load = QtCore.pyqtSignal(name="filament_load_t1")
     request_back = QtCore.pyqtSignal(name="request_back")
     request_change_page = QtCore.pyqtSignal(int, int, name="request_change_page")
+    request_change_tab = QtCore.pyqtSignal(int, name="request_change_tab")
     request_toolhead_count = QtCore.pyqtSignal(int, name="toolhead_number_received")
     run_gcode = QtCore.pyqtSignal(str, name="run_gcode")
     call_load_panel = QtCore.pyqtSignal(bool, str, name="call-load-panel")
 
-    class FilamentTypes(enum.Enum):
-        PLA = Filament(name="PLA", temperature=220)
-
     class FilamentStates(enum.Enum):
         LOADED = enum.auto()
         UNLOADED = enum.auto()
@@ -43,37 +52,45 @@ def __init__(self, parent: QtWidgets.QWidget, printer: Printer, ws, /) -> None:
         self.popup = Popup(self)
         self.has_load_unload_objects = None
         self._filament_state = self.FilamentStates.UNKNOWN
-        self._sensor_states = {}
-        self.filament_type: Filament | None = None
+        self.filament_type = FilamentTypes.UNKNOWN
+
+        cfg = parent.config
+        if cfg.has_section("filament_presence"):
+            i = cfg.get_section("filament_presence", None)
+            self.filament_sensor = i.get("name", str, None)
+        else:
+            self.filament_sensor = None
         self.panel.filament_page_load_btn.clicked.connect(
             partial(self.change_page, self.indexOf(self.panel.load_page))
         )
         self.panel.custom_filament_header_back_btn.clicked.connect(self.back_button)
         self.panel.load_custom_btn.hide()
         self.panel.load_header_back_button.clicked.connect(self.back_button)
         self.panel.load_pla_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=220)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.PLA)
         )
         self.panel.load_petg_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=240)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.PETG)
         )
         self.panel.load_abs_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=250)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.ABS)
         )
         self.panel.load_hips_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=250)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.HIPS)
         )
         self.panel.load_nylon_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=270)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.NYLON)
         )
         self.panel.load_tpu_btn.clicked.connect(
-            partial(self.load_filament, toolhead=0, temp=230)
+            partial(self.load_filament, toolhead=0, filament=FilamentTypes.TPU)
         )
         self.panel.filament_page_unload_btn.clicked.connect(
             lambda: self.unload_filament(toolhead=0, temp=250)
         )
+        self.panel.main_back_button.clicked.connect(
+            lambda: self.request_change_tab.emit(0)
+        )
         self.run_gcode.connect(self.ws.api.run_gcode)
-        self.printer.extruder_update.connect(self.on_extruder_update)
         self.printer.unload_filament_update.connect(self.on_unload_filament)
         self.printer.load_filament_update.connect(self.on_load_filament)
         self.printer.filament_switch_sensor_update.connect(
@@ -84,8 +101,18 @@ def __init__(self, parent: QtWidgets.QWidget, printer: Printer, ws, /) -> None:
         self.printer.print_stats_update[str, dict].connect(self.on_print_stats_update)
         self.printer.print_stats_update[str, float].connect(self.on_print_stats_update)
 
-        self.loadignore = True
-        self.unloadignore = True
+        self.printer.save_variables_update.connect(self.on_save_variables_update)
+        self.state = "standby"
+
+    def on_save_variables_update(self, save_variables: dict):
+        """Handle query response"""
+        for i in FilamentTypes:
+            if i.value.name in save_variables["variables"]["filament_type"]:
+                self.filament_type = i
+                break
+            else:
+                self.filament_type = FilamentTypes.UNKNOWN
+        self.panel.label_2.setText(self.filament_type.value.name)
 
     @QtCore.pyqtSlot(str, dict, name="on_print_stats_update")
     @QtCore.pyqtSlot(str, float, name="on_print_stats_update")
@@ -94,9 +121,23 @@ def on_print_stats_update(self, field: str, value: dict | float | str) -> None:
         """Handle print stats object update"""
         if isinstance(value, str):
             if "state" in field:
+                self.state = value
+                if value in ("printing", "pausing", "paused", "resuming"):
+                    self.panel.main_back_button.show()
+                    self.panel.spacerItem1.changeSize(
+                        60,
+                        0,
+                        QtWidgets.QSizePolicy.Policy.Minimum,
+                        QtWidgets.QSizePolicy.Policy.Minimum,
+                    )
                 if value in ("standby"):
-                    self.loadignore = True
-                    self.unloadignore = True
+                    self.panel.main_back_button.hide()
+                    self.panel.spacerItem1.changeSize(
+                        0,
+                        0,
+                        QtWidgets.QSizePolicy.Policy.Minimum,
+                        QtWidgets.QSizePolicy.Policy.Minimum,
+                    )
 
     @QtCore.pyqtSlot(str, str, bool, name="on_filament_sensor_update")
     def on_filament_sensor_update(self, sensor_name: str, parameter: str, value: bool):
@@ -106,78 +147,46 @@ def on_filament_sensor_update(self, sensor_name: str, parameter: str, value: boo
                 self._filament_state = self.FilamentStates.UNKNOWN
                 self.handle_filament_state()
                 return
-            self._sensor_states[sensor_name] = value
-            if not self._sensor_states:
-                new_state = self.FilamentStates.UNKNOWN
-            elif all(self._sensor_states.values()):
-                new_state = self.FilamentStates.LOADED
-            else:
-                new_state = self.FilamentStates.UNLOADED
-            if self._filament_state != new_state:
-                self._filament_state = new_state
-                self.handle_filament_state()
+            if sensor_name == self.filament_sensor:
+                if value:
+                    self._filament_state = self.FilamentStates.LOADED
+                else:
+                    self._filament_state = self.FilamentStates.UNLOADED
+                return
+        self.handle_filament_state()
 
-    @QtCore.pyqtSlot(str, str, float, name="on_extruder_update")
-    def on_extruder_update(
-        self, extruder_name: str, field: str, new_value: float
-    ) -> None:
-        """Handle extruder update"""
-        if not self.isVisible:
-            return
-        if not self.loadignore or not self.unloadignore:
-            if self.target_temp != 0:
-                if self.current_temp == self.target_temp:
-                    if self.isVisible:
-                        self.call_load_panel.emit(
-                            True, "Extruder heated up \n Please wait"
-                        )
-                    return
-                if field == "temperature":
-                    self.current_temp = round(new_value, 0)
-                    if self.isVisible:
-                        self.call_load_panel.emit(
-                            True,
-                            f"Heating up ({new_value}/{self.target_temp}) \n Please wait",
-                        )
-            if field == "target":
-                self.target_temp = round(new_value, 0)
-                if self.isVisible:
-                    self.call_load_panel.emit(True, "Heating up \n Please wait")
-
-    @QtCore.pyqtSlot(bool, name="on_load_filament")
-    def on_load_filament(self, status: bool):
+    @QtCore.pyqtSlot(dict, name="on_load_filament")
+    def on_load_filament(self, status: dict):
         """Handle load filament object updated"""
-        if not self.isVisible:
-            return
-        if self.loadignore:
-            return
-        if status:
-            self.call_load_panel.emit(True, "Loading Filament")
-        else:
-            self.loadignore = True
-            self.target_temp = 0
-            self.call_load_panel.emit(False, "")
-            self._filament_state = self.FilamentStates.LOADED
+        if "state" in status.keys():
+            if not status["state"]:
+                self.target_temp = 0
+                self.call_load_panel.emit(False, "")
+                if self.state == "paused":
+                    self.request_change_tab.emit(0)
+                return
+        self.call_load_panel.emit(
+            True, f"Loading Filament\n{status['step'].capitalize()}"
+        )
         self.handle_filament_state()
 
-    @QtCore.pyqtSlot(bool, name="on_unload_filament")
-    def on_unload_filament(self, status: bool):
+    @QtCore.pyqtSlot(dict, name="on_unload_filament")
+    def on_unload_filament(self, status: dict):
         """Handle unload filament object updated"""
-        if not self.isVisible:
-            return
-        if self.unloadignore:
-            return
-        if status:
-            self.call_load_panel.emit(True, "Unloading Filament")
-        else:
-            self.unloadignore = True
-            self.call_load_panel.emit(False, "")
-            self.target_temp = 0
-            self._filament_state = self.FilamentStates.UNLOADED
+        if "state" in status.keys():
+            if not status["state"]:
+                self.target_temp = 0
+                self.call_load_panel.emit(False, "")
+                return
+        self.call_load_panel.emit(
+            True, f"Unloading Filament\n{status['step'].capitalize()}"
+        )
         self.handle_filament_state()
 
     @QtCore.pyqtSlot(int, int, name="load_filament")
-    def load_filament(self, toolhead: int = 0, temp: int = 220) -> None:
+    def load_filament(
+        self, toolhead: int = 0, filament: FilamentTypes = FilamentTypes.UNKNOWN
+    ) -> None:
         """Handle load filament buttons clicked"""
         if not self.isVisible:
             return
@@ -194,9 +203,11 @@ def load_filament(self, toolhead: int = 0, temp: int = 220) -> None:
                 message="Filament is already loaded.",
             )
             return
-        self.loadignore = False
         self.call_load_panel.emit(True, "Loading Filament")
-        self.run_gcode.emit(f"LOAD_FILAMENT TOOLHEAD=load_toolhead TEMPERATURE={temp}")
+        self.run_gcode.emit(
+            f"""SAVE_VARIABLE VARIABLE=filament_type VALUE='"{filament.value.name}"'"""
+        )
+        self.run_gcode.emit(f"LOAD_FILAMENT TEMPERATURE={filament.value.temperature}")
 
     @QtCore.pyqtSlot(str, int, name="unload_filament")
     def unload_filament(self, toolhead: int = 0, temp: int = 220) -> None:
@@ -218,21 +229,23 @@ def unload_filament(self, toolhead: int = 0, temp: int = 220) -> None:
             return
 
         self.find_routine_objects()
-        self.unloadignore = False
         self.call_load_panel.emit(True, "Unloading Filament")
+        self.run_gcode.emit(
+            f"""SAVE_VARIABLE VARIABLE=filament_type VALUE='"{FilamentTypes.UNKNOWN.value.name}"'"""
+        )
         self.run_gcode.emit(f"UNLOAD_FILAMENT TEMPERATURE={temp}")
 
     def handle_filament_state(self):
         """Handle ui changes on filament states"""
         if self._filament_state == self.FilamentStates.LOADED:
-            self.panel.filament_page_load_btn.setDisabled(True)
-            self.panel.filament_page_load_btn.setDisabled(False)
+            self.panel.filament_page_unload_btn.setEnabled(True)
+            self.panel.filament_page_load_btn.setEnabled(False)
         elif self._filament_state == self.FilamentStates.UNLOADED:
-            self.panel.filament_page_unload_btn.setDisabled(True)
-            self.panel.filament_page_unload_btn.setDisabled(False)
+            self.panel.filament_page_unload_btn.setEnabled(False)
+            self.panel.filament_page_load_btn.setEnabled(True)
         else:
-            self.panel.filament_page_load_btn.setDisabled(False)
-            self.panel.filament_page_unload_btn.setDisabled(False)
+            self.panel.filament_page_load_btn.setEnabled(True)
+            self.panel.filament_page_unload_btn.setEnabled(True)
 
     @property
     def filament_state(self):