Refactored main function

3 files changed, 150 insertions, 32 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2607b49..064613a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,7 +18,7 @@ lint:
 test:
   stage: test
   script:
-    - poetry run pytest --cov=. --cov-report=xml
+    - poetry run pytest -v --cov=. --cov-report=xml
   after_script:
     - bash <(curl -s https://codecov.io/bash)
   artifacts:
diff --git a/src/subscleaner/subscleaner.py b/src/subscleaner/subscleaner.py
index 6e92fd5..0896d6c 100755
--- a/src/subscleaner/subscleaner.py
+++ b/src/subscleaner/subscleaner.py
@@ -1,4 +1,3 @@
-#!/usr/bin/python3
 """Main Subscleaner module."""
 
 """
@@ -84,7 +83,57 @@ def ads_in_line(line: str) -> bool:
     return any(re.match(ad, line, re.DOTALL) for ad in ADS)
 
 
-def process_file(filename):
+def is_already_processed(filename: str) -> bool:
+    """
+    Check if the file has already been processed.
+
+    Args:
+        filename (str): The path to the subtitle file.
+
+    Returns:
+        bool: True if the file has already been processed, False otherwise.
+    """
+    created = os.path.getctime(filename)
+    already_processed = time.mktime(
+        time.strptime("2021-05-13 00:00:00", "%Y-%m-%d %H:%M:%S"),
+    )
+    return created < already_processed
+
+
+def detect_encoding(filename: str) -> str:
+    """
+    Detect the encoding of the subtitle file.
+
+    Args:
+        filename (str): The path to the subtitle file.
+
+    Returns:
+        str: The detected encoding of the file.
+    """
+    with open(filename, "rb") as f:
+        return chardet.detect(f.read())["encoding"]
+
+
+def remove_ads(subs: pysrt.SubRipFile) -> bool:
+    """
+    Remove ads from the subtitle file.
+
+    Args:
+        subs (pysrt.SubRipFile): The subtitle file object.
+
+    Returns:
+        bool: True if the file was modified, False otherwise.
+    """
+    modified = False
+    for i, line in enumerate(subs):
+        if ads_in_line(line.text):
+            print(f"Removing: {line}\n")
+            del subs[i]
+            modified = True
+    return modified
+
+
+def process_file(filename: str) -> bool:
     """
     Process a subtitle file to remove ads.
 
@@ -95,28 +144,16 @@ def process_file(filename):
         bool: True if the file was modified, False otherwise.
     """
     try:
-        created = os.path.getctime(filename)
-        already_processed = time.mktime(
-            time.strptime("2021-05-13 00:00:00", "%Y-%m-%d %H:%M:%S"),
-        )
-        if created < already_processed:
+        if is_already_processed(filename):
             print(f"Already processed {filename}")
             return False
 
         print(f"Analyzing: {filename}")
 
-        with open(filename, "rb") as f:
-            encoding = chardet.detect(f.read())["encoding"]
-
+        encoding = detect_encoding(filename)
         subs = pysrt.open(filename, encoding=encoding)
-        modified = False
-        for i, line in enumerate(subs):
-            if ads_in_line(line.text):
-                print(f"Removing: {line}\n")
-                del subs[i]
-                modified = True
-
-        if modified:
+
+        if remove_ads(subs):
             print(f"Saving {filename}")
             subs.save(filename)
             return True
@@ -126,6 +163,23 @@ def process_file(filename):
         return False
 
 
+def process_files(filenames: list[str]) -> list[str]:
+    """
+    Process multiple subtitle files to remove ads.
+
+    Args:
+        filenames (list[str]): A list of subtitle file paths.
+
+    Returns:
+        list[str]: A list of modified file paths.
+    """
+    modified_files = []
+    for filename in filenames:
+        if process_file(filename):
+            modified_files.append(filename)
+    return modified_files
+
+
 def main():
     """
     Process subtitle files to remove ads.
@@ -134,13 +188,9 @@ def main():
     and print the result. Keep track of the modified files and print
     a summary at the end.
     """
-    modified_files = []
+    filenames = [filename.strip() for filename in sys.stdin]
     print("Starting script")
-    for filename in sys.stdin:
-        filename = filename.strip()
-        if process_file(filename):
-            modified_files.append(filename)
-
+    modified_files = process_files(filenames)
     if modified_files:
         print(f"Modified {len(modified_files)} files")
     print("Done")
diff --git a/tests/test_subscleaner.py b/tests/test_subscleaner.py
index 73e7453..6172ff8 100644
--- a/tests/test_subscleaner.py
+++ b/tests/test_subscleaner.py
@@ -3,9 +3,18 @@
 from io import StringIO
 from unittest.mock import patch
 
+import pysrt
 import pytest
 
-from src.subscleaner.subscleaner import ads_in_line, main, process_file
+from src.subscleaner.subscleaner import (
+    ads_in_line,
+    detect_encoding,
+    is_already_processed,
+    main,
+    process_file,
+    process_files,
+    remove_ads,
+)
 
 
 @pytest.fixture
@@ -51,6 +60,50 @@ def test_ads_in_line(line, expected):
     assert ads_in_line(line) is expected
 
 
+def test_is_already_processed(tmpdir):
+    """
+    Test the is_already_processed function.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+    """
+    file_path = create_sample_srt_file(tmpdir, "")
+    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=0):
+        assert is_already_processed(file_path) is True
+
+    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=9999999999):
+        assert is_already_processed(file_path) is False
+
+
+def test_detect_encoding(tmpdir, sample_srt_content):
+    """
+    Test the detect_encoding function.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path = create_sample_srt_file(tmpdir, sample_srt_content)
+    assert detect_encoding(file_path) == "ascii"
+
+
+def test_remove_ads(sample_srt_content):
+    """
+    Test the remove_ads function.
+
+    Args:
+        sample_srt_content (str): The sample SRT content.
+    """
+    subs = pysrt.from_string(sample_srt_content)
+    subs_expected_ammount = 2
+    assert remove_ads(subs) is True
+    assert len(subs) == subs_expected_ammount
+
+    subs = pysrt.from_string("1\n00:00:01,000 --> 00:00:03,000\nThis is a sample subtitle.")
+    assert remove_ads(subs) is False
+    assert len(subs) == 1
+
+
 def test_process_file_no_modification(tmpdir, sample_srt_content):
     """
     Test the process_file function when the file does not require modification.
@@ -60,7 +113,7 @@ def test_process_file_no_modification(tmpdir, sample_srt_content):
         sample_srt_content (str): The sample SRT content.
     """
     file_path = create_sample_srt_file(tmpdir, sample_srt_content)
-    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=0):
+    with patch("src.subscleaner.subscleaner.is_already_processed", return_value=True):
         assert process_file(file_path) is False
 
 
@@ -73,7 +126,7 @@ def test_process_file_with_modification(tmpdir, sample_srt_content):
         sample_srt_content (str): The sample SRT content.
     """
     file_path = create_sample_srt_file(tmpdir, sample_srt_content)
-    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=9999999999):
+    with patch("src.subscleaner.subscleaner.is_already_processed", return_value=False):
         assert process_file(file_path) is True
 
 
@@ -88,6 +141,21 @@ def test_process_file_error(tmpdir):
     assert process_file(str(file_path)) is False
 
 
+def test_process_files(tmpdir, sample_srt_content):
+    """
+    Test the process_files function.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT files.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path1 = create_sample_srt_file(tmpdir, sample_srt_content)
+    file_path2 = create_sample_srt_file(tmpdir, "1\n00:00:01,000 --> 00:00:03,000\nThis is a sample subtitle.")
+    with patch("src.subscleaner.subscleaner.process_file", side_effect=[True, False]):
+        modified_files = process_files([file_path1, file_path2])
+        assert modified_files == [file_path1]
+
+
 def test_main_no_modification(tmpdir, sample_srt_content):
     """
     Test the main function when no files require modification.
@@ -99,10 +167,10 @@ def test_main_no_modification(tmpdir, sample_srt_content):
     file_path = create_sample_srt_file(tmpdir, sample_srt_content)
     with (
         patch("sys.stdin", StringIO(file_path)),
-        patch("src.subscleaner.subscleaner.process_file", return_value=False) as mock_process_file,
+        patch("src.subscleaner.subscleaner.process_files", return_value=[]) as mock_process_files,
     ):
         main()
-        mock_process_file.assert_called_once_with(file_path)
+        mock_process_files.assert_called_once_with([file_path])
 
 
 def test_main_with_modification(tmpdir, sample_srt_content):
@@ -116,7 +184,7 @@ def test_main_with_modification(tmpdir, sample_srt_content):
     file_path = create_sample_srt_file(tmpdir, sample_srt_content)
     with (
         patch("sys.stdin", StringIO(file_path)),
-        patch("src.subscleaner.subscleaner.process_file", return_value=True) as mock_process_file,
+        patch("src.subscleaner.subscleaner.process_files", return_value=[file_path]) as mock_process_files,
     ):
         main()
-        mock_process_file.assert_called_once_with(file_path)
+        mock_process_files.assert_called_once_with([file_path])