metadata.py: add parsing of filament type

This commit will add parsing of optional filament type metadata for:
- PrusaSlicer and it's derivatives
- Cura
- IdeaMaker

For Cura and IdeaMaker it is necessary to add a custom start g-code comment.
Cura:
;Filament type = {material_type}
IdeaMaker:
;Filament type = {filament_name_abbreviation1}

Signed-off-by: Dominik Willner <th33xitus@gmail.com>

moonraker/components/file_manager/metadata.py

@@ -26,6 +26,7 @@ from typing import (
     Dict,
     List,
     Type,
+    Union
 )
 if TYPE_CHECKING:
     pass
@@ -83,6 +84,12 @@ def _regex_find_first(pattern: str, data: str) -> Optional[float]:
             return None
     return val
 
+def _regex_find_string(pattern: str, data: str) -> Optional[str]:
+    match = re.search(pattern, data)
+    if match:
+        return match.group(1)
+    return None
+
 # Slicer parsing implementations
 class BaseSlicer(object):
     def __init__(self, file_path: str) -> None:
@@ -172,6 +179,9 @@ class BaseSlicer(object):
     def parse_filament_weight_total(self) -> Optional[float]:
         return None
 
+    def parse_filament_type(self) -> Optional[str]:
+        return None
+
     def parse_estimated_time(self) -> Optional[float]:
         return None
 
@@ -336,6 +346,10 @@ class PrusaSlicer(BaseSlicer):
         return _regex_find_first(
             r"total\sfilament\sused\s\[g\]\s=\s(\d+\.\d*)", self.footer_data)
 
+    def parse_filament_type(self) -> Optional[str]:
+        return _regex_find_string(
+            r";\sfilament_type\s=\s(.*)", self.footer_data)
+
     def parse_estimated_time(self) -> Optional[float]:
         time_match = re.search(
             r';\sestimated\sprinting\stime.*', self.footer_data)
@@ -453,6 +467,10 @@ class Cura(BaseSlicer):
         return _regex_find_first(
             r";Filament\sweight\s=\s.(\d+\.\d+).", self.header_data)
 
+    def parse_filament_type(self) -> Optional[str]:
+        return _regex_find_string(
+            r";Filament\stype\s=\s(.*)", self.header_data)
+
     def parse_estimated_time(self) -> Optional[float]:
         return self._parse_max_float(r";TIME:.*", self.header_data)
 
@@ -671,6 +689,10 @@ class IdeaMaker(BaseSlicer):
             return sum(filament)
         return None
 
+    def parse_filament_type(self) -> Optional[str]:
+        return _regex_find_string(
+            r";Filament\stype\s=\s(.*)", self.header_data)
+
     def parse_filament_weight_total(self) -> Optional[float]:
         pi = 3.141592653589793
         length = _regex_find_floats(
@@ -751,6 +773,7 @@ SUPPORTED_DATA = [
     'first_layer_bed_temp',
     'filament_total',
     'filament_weight_total',
+    'filament_type',
     'thumbnails']
 
 def process_objects(file_path: str) -> None: