1 files changed, 73 insertions, 0 deletions
diff --git a/day4/task3/db.py b/day4/task3/db.py
new file mode 100644
index 0000000..c23e9fb
--- /dev/null
+++ b/day4/task3/db.py
@@ -0,0 +1,73 @@
+import re
+import bisect
+from datetime import datetime
+
+
+db = []
+
+
+def search_by_date(hour, minute=None, second=None, data=None):
+    low = [hour]
+    high = [hour]
+    if minute is not None:
+        low.append(minute)
+        high.append(minute)
+
+        if second is not None:
+            low.append(second)
+            high.append(second + 1)
+        else:
+            high.append(60)
+    else:
+        high.append(60)
+
+    left = bisect.bisect_left(db, tuple(low))
+    right = bisect.bisect_left(db, tuple(high))
+    return [t[4] for t in db[left:right] if data in t[3]]
+
+
+def open_log(path):
+    try:
+        f = open(path)
+
+    except FileNotFoundError:
+        print('Файл с логом не обнаружен')
+        return
+
+    except PermissionError:
+        print('Файл с логом не доступен для чтения')
+        return
+
+    return f
+
+
+# Возвращает значение успешности инициализации базы данных
+def init(path) -> bool:
+    f = open_log(path)
+    if f is None:
+        return False
+
+    matcher = re.compile(r'\[(?P<date>.*?)\]\[(?P<type>.*?)\]\[(?P<module>.*?)\]\[(?P<id>.*?)\] (?P<text>.*)')
+
+    lines = f.readlines()
+    f.close()
+    for line in lines:
+        line = line.strip()
+        match = re.match(matcher, line)
+
+        if match:
+            try:
+                date = datetime.strptime(match.group('date'), '%c')
+            except ValueError:
+                print(f'Ошибка при разборе строки (Неверный формат даты):\n{line}')
+                continue
+
+            module = match.group('module')
+
+            db.append((date.hour, date.minute, date.second, module, line))
+
+        else:
+            print(f'Ошибка при разборе строки:\n{line}')
+
+    db.sort()
+    return True