fix error in gitignore

apps/notifications/providers.py

@@ -0,0 +1,61 @@
+"""Pluggable SMS / notification providers.
+
+Providers are selected at runtime from the dynamic settings store, so an SMS
+gateway can be configured from the admin panel without touching code. Business
+logic only ever talks to the provider interface.
+"""
+import json
+import re
+import urllib.request
+from typing import Protocol
+
+from apps.core.settings_service import SettingsService
+
+
+class SmsProviderInterface(Protocol):
+    def send(self, recipient: str, message: str) -> str:
+        """Return the provider message id."""
+        ...
+
+
+class MockSmsProvider:
+    def send(self, recipient: str, message: str) -> str:
+        return f"MOCK-{recipient}-{abs(hash(message)) % 10_000_000}"
+
+
+class HttpSmsProvider:
+    """Generic HTTP gateway: POSTs a JSON payload to a configurable endpoint."""
+
+    def __init__(self, endpoint: str, api_key: str = "", sender: str = ""):
+        self.endpoint = endpoint
+        self.api_key = api_key
+        self.sender = sender
+
+    def send(self, recipient: str, message: str) -> str:
+        payload = {"to": recipient, "text": message, "from": self.sender, "api_key": self.api_key}
+        data = json.dumps(payload).encode("utf-8")
+        request = urllib.request.Request(
+            self.endpoint, data=data, headers={"Content-Type": "application/json"}, method="POST"
+        )
+        with urllib.request.urlopen(request, timeout=15) as response:
+            return response.read().decode("utf-8", "replace")[:120]
+
+
+def get_sms_provider() -> SmsProviderInterface:
+    service = SettingsService()
+    provider = service.get("sms.provider", "mock")
+    if provider == "http":
+        return HttpSmsProvider(
+            endpoint=service.get("sms.endpoint", ""),
+            api_key=service.get("sms.api_key", ""),
+            sender=service.get("sms.sender", ""),
+        )
+    return MockSmsProvider()
+
+
+def render_template(template_text: str, context: dict) -> str:
+    def _replace(match):
+        key = match.group(1)
+        return str(context.get(key, ""))
+
+    return re.sub(r"\{\{\s*(\w+)\s*\}\}", _replace, template_text)