Add Belgium and North Sea coverage foundation

backend/app/schemas/coverage.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+from typing import Literal
+from uuid import UUID
+
+from pydantic import BaseModel, Field, model_validator
+
+
+CoverageStatus = Literal["operational", "partial", "not_configured", "unsupported"]
+CoverageAuthority = Literal["authoritative", "official_context", "contextual"]
+CoverageAcquisitionMode = Literal[
+    "operator_archive",
+    "operator_wfs",
+    "bounded_api",
+    "bounded_raster",
+    "catalog_only",
+]
+
+
+class CoverageBBox(BaseModel):
+    minx: float = Field(ge=-180, le=180)
+    miny: float = Field(ge=-90, le=90)
+    maxx: float = Field(ge=-180, le=180)
+    maxy: float = Field(ge=-90, le=90)
+
+    @model_validator(mode="after")
+    def validate_extent(self) -> "CoverageBBox":
+        if self.maxx <= self.minx or self.maxy <= self.miny:
+            raise ValueError("bbox max values must be greater than min values")
+        return self
+
+
+class CoverageSourceContract(BaseModel):
+    source_name: str
+    display_name: str
+    authority_level: CoverageAuthority
+    coverage_zones: list[str]
+    themes: list[str]
+    native_layers: list[str]
+    supported_geometry_types: list[str]
+    acquisition_mode: CoverageAcquisitionMode
+    integration_status: CoverageStatus
+    source_url: str
+    attribution: str
+    license_note: str
+    limitation_message: str
+
+
+class CoverageCatalogResponse(BaseModel):
+    themes: list[str]
+    zones: list[str]
+    statuses: list[CoverageStatus]
+    sources: list[CoverageSourceContract]
+
+
+class CoverageResolveRequest(BaseModel):
+    project_id: UUID
+    bbox: CoverageBBox
+    themes: list[str] = Field(default_factory=list, max_length=32)
+
+
+class CoverageResolutionItem(BaseModel):
+    zone: str
+    theme: str
+    status: CoverageStatus
+    source_names: list[str]
+    materialized_dataset_ids: list[UUID]
+    limitation_message: str
+
+
+class CoverageResolveResponse(BaseModel):
+    project_id: UUID
+    bbox: CoverageBBox
+    requested_themes: list[str]
+    intersected_zones: list[str]
+    outside_supported_scope: bool
+    items: list[CoverageResolutionItem]
+    warnings: list[str]