add exercise write up class

scripts/exercises.py

@@ -1,16 +1,13 @@
-from file_list import Files
+from file_list import Files, FileHandle, FileType
 from pathlib import Path
 from typing import Dict
 
 
-class ExerciseWriteUp:
+class ExerciseWriteUp(FileHandle):
     def __init__(self, root_dir: Path, course):
         self.root_dir = root_dir
         self.course = course
-        self.number = 1
-
-    def edit(self):
-        pass
+        FileHandle.__init__(self, next(self.root_dir.rglob('*.tex')), FileType.tex)
 
 
 class Exercise:
@@ -53,6 +50,7 @@ class Exercises(list):
         self._solutions = None
         self._writeups = None
         self._sheets = Files(self.sheet_root)
+        self.ignored_folders = [self.sheet_root, self.solutions_root]
         list.__init__(self, (Exercise(self.course, num) for num in map(lambda s: s.number, self._sheets)))
 
     @property
@@ -68,8 +66,7 @@ class Exercises(list):
     @property
     def writeups(self):
         if not self._writeups:
-            dirs = (d for d in self.root.iterdir()
-                    if d.root is not self.sheet_root.root and d.root is not self.solutions_root.root)
+            dirs = list(d for d in self.root.iterdir() if d.is_dir() and d not in self.ignored_folders)
             self._writeups = sorted((ExerciseWriteUp(d, self.course) for d in dirs), key=lambda e: e.number)
         return self._writeups
 

scripts/file_list.py

@@ -3,13 +3,20 @@ import re
 import subprocess
 import warnings
 from pathlib import Path
-from window_subprocess import open_pdf
+from window_subprocess import open_pdf, edit
+from enum import Enum
+
+
+class FileType(Enum):
+    pdf = 'pdf'
+    tex = 'tex'
 
 
 class FileHandle:
-    def __init__(self, file_path: Path):
+    def __init__(self, file_path: Path, file_type: FileType = FileType.pdf):
         self.path = file_path
-        match = re.match(r'[\D]*(\d+)[\D]*\.pdf', file_path.name)
+        self.file_type = file_type
+        match = re.match(r'[\D]*(\d+)[\D]*\.' + file_type.value, file_path.name)
         if match is None:
             warnings.warn(f'Invalid format in file {str(file_path)}: Could not parse number.')
             self.number = -1
@@ -17,7 +24,20 @@ class FileHandle:
             self.number = int(match.group(1))
     
     def open(self):
-        open_pdf(self.path)
+        if self.file_type == FileType.pdf:
+            open_pdf(self.path)
+            return 0
+        elif self.file_type == FileType.tex:
+            edit(self.path)
+            return 0
+        return 1
+
+    def edit(self):
+        if self.file_type == FileType.tex:
+            edit(self.path)
+            return 0
+        else:
+            return 1
 
 
 class Files(list):

scripts/window_subprocess.py

@@ -7,7 +7,7 @@ import os
 
 def edit(filepath: Path, rootpath: Path = None, env=os.environ):
     if not rootpath:
-        rootpath = filepath
+        rootpath = filepath.root
     subprocess.Popen([
         "termite",
         "-e",