Add source models

src/models/rule.py

@@ -0,0 +1,61 @@
+"""Rule model for validation patterns."""
+
+import re
+from dataclasses import dataclass, field
+from typing import Optional, Pattern
+
+
+@dataclass
+class Rule:
+    """Represents a validation rule."""
+
+    id: str
+    name: str
+    pattern: str
+    severity: str
+    message: str
+    suggestion: str = ""
+    enabled: bool = True
+    _compiled_pattern: Optional[Pattern[str]] = field(default=None, repr=False)
+
+    def __post_init__(self):
+        """Compile the regex pattern after initialization."""
+        try:
+            self._compiled_pattern = re.compile(self.pattern)
+        except re.error as e:
+            raise ValueError(f"Invalid regex pattern '{self.pattern}': {e}")
+
+    def match(self, text: str) -> Optional[re.Match[str]]:
+        """Match the pattern against text."""
+        if self._compiled_pattern:
+            return self._compiled_pattern.search(text)
+        return None
+
+    def matches(self, text: str) -> bool:
+        """Check if the pattern matches the text."""
+        return self.match(text) is not None
+
+    def to_dict(self) -> dict:
+        """Convert rule to dictionary."""
+        return {
+            "id": self.id,
+            "name": self.name,
+            "pattern": self.pattern,
+            "severity": self.severity,
+            "message": self.message,
+            "suggestion": self.suggestion,
+            "enabled": self.enabled,
+        }
+
+    @classmethod
+    def from_dict(cls, data: dict) -> "Rule":
+        """Create a Rule from a dictionary."""
+        return cls(
+            id=data["id"],
+            name=data["name"],
+            pattern=data["pattern"],
+            severity=data["severity"],
+            message=data["message"],
+            suggestion=data.get("suggestion", ""),
+            enabled=data.get("enabled", True),
+        )