feat: Add RSS feed generator with versioning support

src/models/deprecation.py

@@ -1,135 +1,153 @@
-"""Data models for deprecation entries."""
+"""Deprecation model for AI model deprecation tracking."""
 
-import hashlib
 from datetime import UTC, datetime
-from typing import Any
 
-from pydantic import BaseModel, Field, HttpUrl, field_validator, model_validator
+from pydantic import BaseModel, Field, field_validator, model_validator
 
 
-class Deprecation(BaseModel):
-    """Model for AI model deprecation information."""
+class DeprecationEntry(BaseModel):
+    """Model representing an AI model deprecation entry."""
 
-    provider: str = Field(description="Provider name (e.g., 'OpenAI', 'Anthropic')")
-    model: str = Field(description="Affected model name")
-    deprecation_date: datetime = Field(description="When the deprecation was announced")
-    retirement_date: datetime = Field(description="When the model stops working")
-    replacement: str | None = Field(default=None, description="Suggested alternative model")
-    notes: str | None = Field(default=None, description="Additional context")
-    source_url: HttpUrl = Field(description="URL where the deprecation info came from")
+    provider: str = Field(..., description="Provider name (e.g., OpenAI, Anthropic)")
+    model: str = Field(..., description="Model name or identifier")
+    deprecation_date: datetime = Field(..., description="Date when deprecation was announced")
+    retirement_date: datetime = Field(..., description="Date when model stops working")
+    replacement: str | None = Field(None, description="Suggested alternative model")
+    notes: str | None = Field(None, description="Additional context or information")
+    source_url: str = Field(..., description="Link to official announcement")
     last_updated: datetime = Field(
         default_factory=lambda: datetime.now(UTC),
-        description="When we last checked this information",
-    )
-    # Alias for compatibility with main branch
-    created_at: datetime = Field(
-        default_factory=lambda: datetime.now(UTC),
-        description="When entry was created (alias for last_updated)",
+        description="When this entry was last updated",
     )
 
-    @field_validator("deprecation_date", "retirement_date", "last_updated")
+    @field_validator("provider", "model")
+    @classmethod
+    def validate_non_empty_string(cls, v: str) -> str:
+        """Ensure provider and model are non-empty strings."""
+        if not v or not v.strip():
+            raise ValueError("Field must be a non-empty string")
+        return v.strip()
+
+    @field_validator("source_url")
     @classmethod
-    def ensure_utc_timezone(cls, v: datetime) -> datetime:
-        """Ensure datetime fields have UTC timezone."""
-        if v.tzinfo is None:
-            return v.replace(tzinfo=UTC)
-        return v.astimezone(UTC)
+    def validate_url(cls, v: str) -> str:
+        """Basic URL validation."""
+        if not v.startswith(("http://", "https://")):
+            raise ValueError("URL must start with http:// or https://")
+        return v
 
     @model_validator(mode="after")
-    def validate_dates(self) -> "Deprecation":
-        """Validate that retirement_date is after deprecation_date."""
+    def validate_dates(self) -> "DeprecationEntry":
+        """Ensure retirement date is after deprecation date."""
         if self.retirement_date <= self.deprecation_date:
-            raise ValueError("retirement_date must be after deprecation_date")
+            raise ValueError("Retirement date must be after deprecation date")
         return self
 
+    def to_rss_item(self) -> dict[str, str | datetime]:
+        """Convert to RSS item dictionary."""
+        description_parts = [
+            f"Provider: {self.provider}",
+            f"Model: {self.model}",
+            f"Deprecation Date: {self.deprecation_date.isoformat()}",
+            f"Retirement Date: {self.retirement_date.isoformat()}",
+        ]
+
+        if self.replacement:
+            description_parts.append(f"Replacement: {self.replacement}")
+
+        if self.notes:
+            description_parts.append(f"Notes: {self.notes}")
+
+        description = "\n".join(description_parts)
+
+        title = f"{self.provider} - {self.model} Deprecation"
+
+        return {
+            "title": title,
+            "description": description,
+            "link": self.source_url,
+            "guid": f"{self.provider}-{self.model}-{self.deprecation_date.isoformat()}",
+            "pubDate": self.deprecation_date,
+        }
+
+    def to_json_dict(self) -> dict[str, str | None]:
+        """Convert to JSON-serializable dictionary."""
+        return {
+            "provider": self.provider,
+            "model": self.model,
+            "deprecation_date": self.deprecation_date.isoformat(),
+            "retirement_date": self.retirement_date.isoformat(),
+            "replacement": self.replacement,
+            "notes": self.notes,
+            "source_url": self.source_url,
+            "last_updated": self.last_updated.isoformat(),
+        }
+
+    model_config = {
+        "json_encoders": {
+            datetime: lambda v: v.isoformat(),
+        }
+    }
+
+    # Compatibility methods for main branch
+    def is_active(self) -> bool:
+        """Check if deprecation is still active (not yet retired)."""
+        now = datetime.now(UTC)
+        return self.retirement_date > now
+
     def get_hash(self) -> str:
-        """Generate hash of core deprecation data (excluding last_updated)."""
-        # Include all fields that identify the unique deprecation, excluding last_updated
+        """Generate hash for core deprecation data."""
+        import hashlib
+
         core_data = {
             "provider": self.provider,
             "model": self.model,
             "deprecation_date": self.deprecation_date.isoformat(),
             "retirement_date": self.retirement_date.isoformat(),
             "replacement": self.replacement,
             "notes": self.notes,
-            "source_url": str(self.source_url),
+            "source_url": self.source_url,
         }
-
-        # Create deterministic string representation
         data_str = str(sorted(core_data.items()))
         return hashlib.sha256(data_str.encode()).hexdigest()
 
     def get_identity_hash(self) -> str:
-        """Generate hash for identifying same deprecation (for updates)."""
-        # Only include immutable fields that identify the unique deprecation
+        """Generate hash for identifying same deprecation."""
+        import hashlib
+
         identity_data = {
             "provider": self.provider,
             "model": self.model,
             "deprecation_date": self.deprecation_date.isoformat(),
             "retirement_date": self.retirement_date.isoformat(),
-            "source_url": str(self.source_url),
+            "source_url": self.source_url,
         }
-
-        # Create deterministic string representation
         data_str = str(sorted(identity_data.items()))
         return hashlib.sha256(data_str.encode()).hexdigest()
 
-    def same_deprecation(self, other: "Deprecation") -> bool:
-        """Check if this represents the same deprecation (for updates)."""
+    def same_deprecation(self, other: "DeprecationEntry") -> bool:
+        """Check if this represents the same deprecation."""
         return self.get_identity_hash() == other.get_identity_hash()
 
     def __eq__(self, other: object) -> bool:
         """Compare deprecations based on core data (excluding last_updated)."""
-        if not isinstance(other, Deprecation):
+        if not isinstance(other, DeprecationEntry):
             return False
         return self.get_hash() == other.get_hash()
 
-    def __hash__(self) -> int:
-        """Hash based on core data for use in sets/dicts."""
-        return hash(self.get_hash())
-
     def __str__(self) -> str:
         """String representation of deprecation."""
         return (
-            f"Deprecation({self.provider} {self.model}: "
-            f"{self.deprecation_date.date()} -> {self.retirement_date.date()})"
+            f"DeprecationEntry(provider='{self.provider}', model='{self.model}', "
+            f"deprecation_date='{self.deprecation_date.date()}', "
+            f"retirement_date='{self.retirement_date.date()}')"
         )
 
-    def is_active(self) -> bool:
-        """Check if the deprecation is still active (not yet retired)."""
-        now = datetime.now(UTC)
-        return self.retirement_date > now
-
-    def to_rss_item(self) -> dict[str, Any]:
-        """Convert deprecation to RSS item format (compatibility with main)."""
-        title = f"{self.provider}: {self.model} Deprecation"
-        description_parts = [
-            f"Model: {self.model}",
-            f"Provider: {self.provider}",
-            f"Deprecation Date: {self.deprecation_date.strftime('%Y-%m-%d')}",
-            f"Retirement Date: {self.retirement_date.strftime('%Y-%m-%d')}",
-        ]
-        if self.replacement:
-            description_parts.append(f"Replacement: {self.replacement}")
-        if self.notes:
-            description_parts.append(f"Notes: {self.notes}")
-
-        return {
-            "title": title,
-            "description": " | ".join(description_parts),
-            "guid": str(self.source_url),
-            "pubDate": self.created_at,
-            "link": str(self.source_url),
-        }
-
-    def __repr__(self) -> str:
-        """Detailed string representation."""
-        return (
-            f"Deprecation(provider='{self.provider}', model='{self.model}', "
-            f"deprecation_date={self.deprecation_date.isoformat()}, "
-            f"retirement_date={self.retirement_date.isoformat()})"
-        )
+    @property
+    def created_at(self) -> datetime:
+        """Alias for compatibility with main branch."""
+        return self.deprecation_date
 
 
-# Main has DeprecationEntry, we use Deprecation, create alias for compatibility
-DeprecationEntry = Deprecation
+# Alias for compatibility with other branches that may use Deprecation
+Deprecation = DeprecationEntry

src/rss/config.py

@@ -0,0 +1,134 @@
+"""RSS feed configuration."""
+
+from pathlib import Path
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+
+class FeedConfig(BaseModel):
+    """Configuration for RSS feed generation."""
+
+    title: str = Field(
+        default="AI Model Deprecations",
+        description="Feed title",
+    )
+    description: str = Field(
+        default="Daily-updated RSS feed tracking AI model deprecations across providers",
+        description="Feed description",
+    )
+    link: str = Field(
+        default="https://deprecations.example.com",
+        description="Feed website link",
+    )
+    language: str = Field(
+        default="en",
+        description="Feed language code",
+    )
+    copyright: str | None = Field(
+        default=None,
+        description="Copyright information",
+    )
+    managing_editor: str | None = Field(
+        default=None,
+        description="Managing editor email",
+    )
+    webmaster: str | None = Field(
+        default=None,
+        description="Webmaster email",
+    )
+    ttl: int = Field(
+        default=1440,
+        description="Time to live in minutes (default 24 hours)",
+        gt=0,
+    )
+
+    model_config = {"validate_assignment": True}
+
+
+class VersionConfig(BaseModel):
+    """Configuration for RSS feed versioning."""
+
+    version: str = Field(
+        default="v1",
+        description="Feed version identifier",
+        pattern=r"^v\d+$",
+    )
+    supported_versions: list[str] = Field(
+        default_factory=lambda: ["v1"],
+        description="List of supported versions",
+    )
+
+    def is_version_supported(self, version: str) -> bool:
+        """Check if a version is supported."""
+        return version in self.supported_versions
+
+    model_config = {"validate_assignment": True}
+
+
+class OutputConfig(BaseModel):
+    """Configuration for RSS feed output paths."""
+
+    base_path: Path = Field(
+        default=Path("output/rss"),
+        description="Base output directory for RSS feeds",
+    )
+    filename: str = Field(
+        default="feed.xml",
+        description="RSS feed filename",
+    )
+
+    def get_versioned_path(self, version: str) -> Path:
+        """Get the full path for a versioned feed."""
+        return self.base_path / version / self.filename
+
+    def ensure_directories(self, version: str) -> None:
+        """Ensure output directories exist for a given version."""
+        versioned_dir = self.base_path / version
+        versioned_dir.mkdir(parents=True, exist_ok=True)
+
+    model_config = {"validate_assignment": True}
+
+
+class RSSConfig(BaseModel):
+    """Complete RSS configuration."""
+
+    feed: FeedConfig = Field(
+        default_factory=FeedConfig,
+        description="Feed metadata configuration",
+    )
+    version: VersionConfig = Field(
+        default_factory=VersionConfig,
+        description="Version configuration",
+    )
+    output: OutputConfig = Field(
+        default_factory=OutputConfig,
+        description="Output path configuration",
+    )
+
+    @classmethod
+    def from_dict(cls, config_dict: dict[str, Any]) -> "RSSConfig":
+        """Create RSSConfig from dictionary."""
+        return cls(
+            feed=FeedConfig(**config_dict.get("feed", {})),
+            version=VersionConfig(**config_dict.get("version", {})),
+            output=OutputConfig(**config_dict.get("output", {})),
+        )
+
+    def to_dict(self) -> dict[str, Any]:
+        """Convert to dictionary."""
+        return {
+            "feed": self.feed.model_dump(),
+            "version": self.version.model_dump(),
+            "output": {
+                "base_path": str(self.output.base_path),
+                "filename": self.output.filename,
+            },
+        }
+
+    model_config = {"validate_assignment": True}
+
+
+def get_default_config() -> RSSConfig:
+    """Get default RSS configuration."""
+    return RSSConfig()