Initial GeoIntel V1 foundation

backend/app/providers/registry.py

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+from __future__ import annotations
+
+from pydantic import BaseModel
+
+from app.core.errors import AppError
+from app.providers.base import ProviderCapability
+from app.providers.fixture import FixtureProvider
+from app.providers.grb import GRBProvider
+from app.providers.manual import ManualProvider
+from app.providers.osm import OSMProvider
+
+
+class ProviderDatasetMapping(BaseModel):
+    provider_name: str
+    dataset_role: str
+    source_name: str
+    reference_required: bool
+    write_path: str = "DatasetService"
+
+
+class ProviderImportResult(BaseModel):
+    provider_name: str
+    status: str
+    message: str
+    requested_layers: list[str]
+    dataset_id: str | None = None
+    dataset_role: str | None = None
+    source_name: str | None = None
+
+
+class ExternalProviderRegistry:
+    def __init__(self) -> None:
+        self.providers = {
+            "grb": GRBProvider(),
+            "osm": OSMProvider(),
+            "manual": ManualProvider(),
+            "fixture": FixtureProvider(),
+        }
+
+    def list_capabilities(self) -> list[ProviderCapability]:
+        return [provider.capability for provider in self.providers.values()]
+
+    def get(self, provider_name: str):
+        normalized = provider_name.strip().lower()
+        if normalized not in self.providers:
+            raise AppError(code="PROVIDER_NOT_FOUND", message="Provider not found", status_code=404)
+        return self.providers[normalized]
+
+    def fetch(self, provider_name: str, project_id: str, area_id: str | None, layers: list[str]) -> dict:
+        provider = self.get(provider_name)
+        return provider.fetch(project_id=project_id, area_id=area_id, layers=layers)
+
+    def dataset_mapping(self, provider_name: str, requested_dataset_role: str | None = None) -> ProviderDatasetMapping:
+        provider = self.get(provider_name)
+        if provider.provider_name == "osm":
+            dataset_role = "reference" if requested_dataset_role == "reference" else "source"
+            return ProviderDatasetMapping(
+                provider_name="osm",
+                dataset_role=dataset_role,
+                source_name="osm",
+                reference_required=requested_dataset_role == "reference",
+            )
+        return ProviderDatasetMapping(
+            provider_name=provider.provider_name,
+            dataset_role="reference",
+            source_name=provider.provider_name,
+            reference_required=True,
+        )
+
+    def import_contract(
+        self,
+        provider_name: str,
+        project_id: str,
+        area_id: str | None,
+        layers: list[str],
+        requested_dataset_role: str | None = None,
+    ) -> ProviderImportResult:
+        del project_id, area_id
+        provider = self.get(provider_name)
+        mapping = self.dataset_mapping(provider.provider_name, requested_dataset_role=requested_dataset_role)
+        if provider.provider_name in {"grb", "osm"}:
+            return ProviderImportResult(
+                provider_name=provider.provider_name,
+                status="not_configured",
+                message=f"No live {provider.display_name} import is configured in Sprint 7B.",
+                requested_layers=layers,
+                dataset_role=mapping.dataset_role,
+                source_name=mapping.source_name,
+            )
+        if provider.provider_name == "manual":
+            return ProviderImportResult(
+                provider_name="manual",
+                status="upload_flow_required",
+                message="Manual provider data must use the existing dataset upload/reference flow.",
+                requested_layers=layers,
+                dataset_role=mapping.dataset_role,
+                source_name=mapping.source_name,
+            )
+        return ProviderImportResult(
+            provider_name="fixture",
+            status="fixture_flow_required",
+            message="Fixture provider data must use checked-in demo/test fixture flows.",
+            requested_layers=layers,
+            dataset_role=mapping.dataset_role,
+            source_name=mapping.source_name,
+        )
+
+
+_registry = ExternalProviderRegistry()
+
+
+def list_provider_capabilities() -> list[ProviderCapability]:
+    return _registry.list_capabilities()
+
+
+def get_provider(provider_name: str):
+    return _registry.get(provider_name)
+
+
+def fetch_provider_data(provider_name: str, project_id: str, area_id: str | None, layers: list[str]) -> dict:
+    return _registry.fetch(provider_name, project_id, area_id, layers)
+
+
+def get_provider_dataset_mapping(provider_name: str, requested_dataset_role: str | None = None) -> ProviderDatasetMapping:
+    return _registry.dataset_mapping(provider_name, requested_dataset_role=requested_dataset_role)
+
+
+def import_provider_dataset(
+    provider_name: str,
+    project_id: str,
+    area_id: str | None,
+    layers: list[str],
+    requested_dataset_role: str | None = None,
+) -> ProviderImportResult:
+    return _registry.import_contract(
+        provider_name=provider_name,
+        project_id=project_id,
+        area_id=area_id,
+        layers=layers,
+        requested_dataset_role=requested_dataset_role,
+    )