Add formatters: table, JSON, text and config

loglens/formatters/base.py

@@ -0,0 +1,28 @@
+"""Base formatter class."""
+
+from abc import ABC, abstractmethod
+from typing import Any, Dict, List, TextIO
+
+
+class OutputFormatter(ABC):
+    """Abstract base class for output formatters."""
+
+    def __init__(self, output: TextIO = None):
+        self.output = output
+
+    @abstractmethod
+    def format(self, data: Any) -> str:
+        """Format data for output."""
+        pass
+
+    def write(self, text: str) -> None:
+        """Write to output stream."""
+        if self.output:
+            self.output.write(text)
+        else:
+            print(text, end="")
+
+    def flush(self) -> None:
+        """Flush output stream."""
+        if self.output:
+            self.output.flush()