Refactor metadata to blueprint/service

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    changed:
+      - /<country_id>/metadata is now implemented via a blueprint/service instead of endpoint.

policyengine_api/api.py

@@ -18,9 +18,10 @@
     simulation_analysis_bp,
 )
 from policyengine_api.routes.tracer_analysis_routes import tracer_analysis_bp
+from policyengine_api.routes.metadata_routes import metadata_bp
+
 from .endpoints import (
     get_home,
-    get_metadata,
     get_household,
     post_household,
     update_household,
@@ -57,7 +58,7 @@
 
 app.route("/", methods=["GET"])(get_home)
 
-app.route("/<country_id>/metadata", methods=["GET"])(get_metadata)
+app.register_blueprint(metadata_bp)
 
 app.route("/<country_id>/household/<household_id>", methods=["GET"])(
     get_household

policyengine_api/endpoints/__init__.py

@@ -1,5 +1,4 @@
 from .home import get_home
-from .metadata import get_metadata
 from .household import (
     get_household,
     post_household,

policyengine_api/routes/metadata_routes.py

@@ -0,0 +1,18 @@
+from flask import Blueprint
+
+from policyengine_api.utils.payload_validators import validate_country
+from policyengine_api.services.metadata_service import MetadataService
+
+metadata_bp = Blueprint("metadata", __name__)
+metadata_service = MetadataService()
+
+
+@metadata_bp.route("/<country_id>/metadata", methods=["GET"])
+@validate_country
+def get_metadata(country_id: str) -> dict:
+    """Get metadata for a country.
+
+    Args:
+        country_id (str): The country ID.
+    """
+    return metadata_service.get_metadata(country_id)

policyengine_api/services/metadata_service.py

@@ -0,0 +1,12 @@
+from policyengine_api.country import COUNTRIES
+
+
+class MetadataService:
+    def get_metadata(self, country_id: str) -> dict:
+        country = COUNTRIES.get(country_id)
+        if country == None:
+            raise RuntimeError(
+                f"Attempted to get metadata for a nonexistant country: '{country_id}'"
+            )
+
+        return country.metadata

tests/python/test_units.py

@@ -1,4 +1,4 @@
-from policyengine_api.endpoints.metadata import get_metadata
+from policyengine_api.routes.metadata_routes import get_metadata
 
 
 def test_units():

tests/python/test_yearly_var_removal.py

@@ -2,7 +2,7 @@
 import json
 
 from policyengine_api.endpoints.household import get_household_under_policy
-from policyengine_api.endpoints.metadata import get_metadata
+from policyengine_api.routes.metadata_routes import get_metadata
 from policyengine_api.endpoints.policy import get_policy
 from policyengine_api.constants import COUNTRY_PACKAGE_VERSIONS
 from policyengine_api.data import database