getting file content

.gitignore

@@ -1 +1,3 @@
 .env
+__pycache__
+functions/__pycache__

functions/config.py

@@ -0,0 +1 @@
+MAX_FILE_CONTENT_CHARS = 10000

functions/get_file_content.py

@@ -0,0 +1,30 @@
+import os
+from functions.config import MAX_FILE_CONTENT_CHARS
+
+
+def get_file_content(working_directory, file_path):
+    try:
+        full_path = os.path.join(working_directory, file_path)
+
+        abs_working_directory = os.path.abspath(working_directory)
+        abs_target_path = os.path.abspath(full_path)
+
+        if not abs_target_path.startswith(abs_working_directory):
+            return (
+                f'Error: Cannot read "{file_path}" as it is outside the permitted working directory'
+            )
+
+        if not os.path.isfile(abs_target_path):
+            return f'Error: File not found or is not a regular file: "{file_path}"'
+
+        with open(abs_target_path, "r", encoding="utf-8", errors="replace") as f:
+            content = f.read()
+
+        if len(content) > MAX_FILE_CONTENT_CHARS:
+            truncated = content[:MAX_FILE_CONTENT_CHARS]
+            return truncated + f'\n[...File "{file_path}" truncated at {MAX_FILE_CONTENT_CHARS} characters]'
+        else:
+            return content
+
+    except Exception as e:
+        return f"Error: {e}"

tests.py

@@ -1,29 +1,25 @@
-from functions.get_files_info import get_files_info
+from functions.get_file_content import get_file_content
 
 
 def run_tests():
     cases = [
-        ("calculator", "."),
-        ("calculator", "pkg"),
-        ("calculator", "/bin"),
-        ("calculator", "../"),
+        ("calculator", "main.py"),
+        ("calculator", "pkg/calculator.py"),
+        ("calculator", "/bin/cat"),
+        ("calculator", "pkg/does_not_exist.py"),
     ]
 
-    for working_dir, directory in cases:
-        print(f'get_files_info("{working_dir}", "{directory}"):')
+    for working_dir, file_path in cases:
+        print(f'get_file_content("{working_dir}", "{file_path}"):')
 
-        result = get_files_info(working_dir, directory)
+        result = get_file_content(working_dir, file_path)
 
-        if directory == ".":
-            print("Result for current directory:")
-        else:
-            print(f"Result for '{directory}' directory:")
-
-        # Indent each line of result
+        print("Result:")
+        # Indent each line of output
         for line in result.splitlines():
-            print(f" {line}")
+            print(" " + line)
 
-        print()  # Extra newline between test cases
+        print()  # Blank line between cases
 
 
 if __name__ == "__main__":