feat: add typed dicts

docs/api/stac.md

@@ -0,0 +1,8 @@
+# STAC
+
+Typed dictionaries for STAC entities.
+
+::: rustac.Catalog
+::: rustac.Collection
+::: rustac.Item
+::: rustac.ItemCollection

mkdocs.yml

@@ -25,6 +25,7 @@ nav:
       - migrate: api/migrate.md
       - read: api/read.md
       - search: api/search.md
+      - stac: api/stac.md
       - version: api/version.md
       - walk: api/walk.md
       - write: api/write.md

pyproject.toml

@@ -46,7 +46,7 @@ asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "function"
 
 [tool.ruff]
-exclude = ["docs/examples/example_*.py"]
+exclude = ["python/rustac/__init__.py", "docs/examples/example_*.py"]
 
 [dependency-groups]
 dev = [
@@ -87,7 +87,8 @@ requires = ["maturin>=1.7,<2.0"]
 build-backend = "maturin"
 
 [tool.maturin]
+python-source = "python"
 strip = true
-opt-level = "z"   # TODO compare with "s"
+opt-level = "z"          # TODO compare with "s"
 lto = true
 codegen-units = 1

python/rustac/__init__.py

@@ -0,0 +1,253 @@
+from __future__ import annotations
+
+from .rustac import *
+from typing import TypedDict
+
+
+class Catalog(TypedDict):
+    """A STAC Catalog object represents a logical group of other Catalog, Collection, and Item objects."""
+
+    type: str
+    """Set to Catalog if this Catalog only implements the Catalog spec."""
+
+    stac_version: str
+    """The STAC version the Catalog implements."""
+
+    stac_extensions: list[str] | None
+    """A list of extension identifiers the Catalog implements."""
+
+    id: str
+    """Identifier for the Catalog."""
+
+    title: str | None
+    """A short descriptive one-line title for the Catalog."""
+
+    description: str
+    """Detailed multi-line description to fully explain the Catalog.
+
+    CommonMark 0.29 syntax MAY be used for rich text representation."""
+
+    links: list[Link]
+    """A list of references to other documents."""
+
+class Collection(TypedDict):
+    """The STAC Collection Specification defines a set of common fields to describe a group of Items that share properties and metadata."""
+
+    type: str
+    """Must be set to Collection to be a valid Collection."""
+
+    stac_version: str
+    """The STAC version the Collection implements."""
+
+    stac_extensions: list[str] | None
+    """A list of extension identifiers the Collection implements."""
+
+    id: str
+    """Identifier for the Collection that is unique across all collections in the root catalog."""
+
+    title: str | None
+    """A short descriptive one-line title for the Collection."""
+
+    description: str
+    """Detailed multi-line description to fully explain the Collection.
+
+    CommonMark 0.29 syntax MAY be used for rich text representation."""
+
+    keywords: list[str] | None
+    """List of keywords describing the Collection."""
+
+    license: str
+    """License(s) of the data collection as SPDX License identifier, SPDX License expression, or `other`."""
+
+    providers: list[Provider] | None
+    """A list of providers, which may include all organizations capturing or processing the data or the hosting provider."""
+
+    extent: Extent
+    """Spatial and temporal extents."""
+
+    summaries: dict[str, Any]
+    """A map of property summaries, either a set of values, a range of values or a JSON Schema."""
+
+    links: list[Link]
+    """A list of references to other documents."""
+
+    assets: dict[str, Asset] | None
+    """Dictionary of asset objects that can be downloaded, each with a unique key."""
+
+    item_assets: dict[str, ItemAsset] | None
+    """A dictionary of assets that can be found in member Items."""
+
+class Provider(TypedDict):
+    """A provider is any of the organizations that captures or processes the content of the Collection and therefore influences the data offered by this Collection."""
+
+    name: str
+    """The name of the organization or the individual."""
+
+    description: str | None
+    """Multi-line description to add further provider information such as processing details for processors and producers, hosting details for hosts or basic contact information.
+
+    CommonMark 0.29 syntax MAY be used for rich text representation."""
+
+    roles: list[
+        Literal["licensor"]
+        | Literal["producer"]
+        | Literal["processor"]
+        | Literal["host"]
+    ]
+    """Roles of the provider."""
+
+    url: str | None
+    """Homepage on which the provider describes the dataset and publishes contact information."""
+
+class Extent(TypedDict):
+    """The object describes the spatio-temporal extents of the Collection."""
+
+    spatial: SpatialExtent
+    """Potential spatial extents covered by the Collection."""
+
+    temporal: TemporalExtent
+    """Potential temporal extents covered by the Collection."""
+
+class SpatialExtent(TypedDict):
+    """The object describes the spatial extents of the Collection."""
+
+    bbox: list[list[int | float]]
+    """Potential spatial extents covered by the Collection."""
+
+class TemporalExtent(TypedDict):
+    """The object describes the temporal extents of the Collection."""
+
+    bbox: list[list[str | None]]
+    """Potential temporal extents covered by the Collection."""
+
+class ItemAsset(TypedDict):
+    """An Item Asset Object defined at the Collection level is nearly the same as the Asset Object in Items, except for two differences.
+
+    The href field is not required, because Item Asset Definitions don't point to any data by themselves, but at least two other fields must be present."""
+
+    title: str | None
+    """The displayed title for clients and users."""
+
+    description: str | None
+    """A description of the Asset providing additional details, such as how it was processed or created.
+
+    CommonMark 0.29 syntax MAY be used for rich text representation."""
+
+    type: str | None
+    """Media type of the asset."""
+
+    roles: list[str] | None
+    """The semantic roles of the asset, similar to the use of rel in links."""
+
+class Item(TypedDict):
+    """An Item is a GeoJSON Feature augmented with foreign members relevant to a STAC object."""
+
+    type: str
+    """Type of the GeoJSON Object. MUST be set to Feature."""
+
+    stac_version: str
+    """The STAC version the Item implements."""
+
+    stac_extensions: list[str] | None
+    """A list of extensions the Item implements."""
+
+    id: str
+    """Provider identifier. The ID should be unique within the Collection that contains the Item."""
+
+    geometry: dict[str, Any] | None
+    """Defines the full footprint of the asset represented by this item, formatted according to RFC 7946, section 3.1 if a geometry is provided or section 3.2 if no geometry is provided."""
+
+    bbox: list[int | float] | None
+    """REQUIRED if geometry is not null, prohibited if geometry is null.
+
+    Bounding Box of the asset represented by this Item, formatted according to RFC 7946, section 5."""
+
+    properties: Properties
+    """A dictionary of additional metadata for the Item."""
+
+    links: list[Link]
+    """List of link objects to resources and related URLs.
+
+    See the best practices for details on when the use self links is strongly recommended."""
+
+    assets: dict[str, Asset]
+    """Dictionary of asset objects that can be downloaded, each with a unique key."""
+
+    collection: str | None
+    """The id of the STAC Collection this Item references to.
+
+    This field is required if a link with a collection relation type is present and is not allowed otherwise."""
+
+class Properties(TypedDict):
+    """Additional metadata fields can be added to the GeoJSON Object Properties."""
+
+    datetime: str | None
+    """The searchable date and time of the assets, which must be in UTC.
+
+    It is formatted according to RFC 3339, section 5.6. null is allowed, but requires start_datetime and end_datetime from common metadata to be set."""
+
+class Link(TypedDict):
+    """This object describes a relationship with another entity.
+
+    Data providers are advised to be liberal with the links section, to describe
+    things like the Catalog an Item is in, related Items, parent or child Items
+    (modeled in different ways, like an 'acquisition' or derived data)."""
+
+    href: str
+    """The actual link in the format of an URL.
+
+    Relative and absolute links are both allowed. Trailing slashes are significant."""
+
+    rel: str
+    """Relationship between the current document and the linked document."""
+
+    type: str | None
+    """Media type of the referenced entity."""
+
+    title: str | None
+    """A human readable title to be used in rendered displays of the link."""
+
+    method: str | None
+    """The HTTP method that shall be used for the request to the target resource, in uppercase.
+
+    GET by default"""
+
+    headers: dict[str, str | list[str]] | None
+    """The HTTP headers to be sent for the request to the target resource."""
+
+    body: Any | None
+    """The HTTP body to be sent to the target resource."""
+
+class Asset(TypedDict):
+    """An Asset is an object that contains a URI to data associated with the Item that can be downloaded or streamed.
+
+    It is allowed to add additional fields."""
+
+    href: str
+    """URI to the asset object. Relative and absolute URI are both allowed. Trailing slashes are significant."""
+
+    title: str | None
+    """The displayed title for clients and users."""
+
+    description: str | None
+    """A description of the Asset providing additional details, such as how it was processed or created.
+
+    CommonMark 0.29 syntax MAY be used for rich text representation."""
+
+    type: str | None
+    """Media type of the asset.
+
+    See the common media types in the best practice doc for commonly used asset types."""
+
+    roles: list[str] | None
+    """The semantic roles of the asset, similar to the use of rel in links."""
+
+class ItemCollection(TypedDict):
+    """A GeoJSON feature collection of STAC Items."""
+
+    features: list[Item]
+    """STAC items."""
+
+__doc__ = rustac.__doc__
+if hasattr(rustac, "__all__"):
+    __all__ = rustac.__all__

rustac.pyi → python/rustac/rustac.pyi

@@ -1,7 +1,11 @@
+"""The power of Rust for the Python STAC ecosystem."""
+
 from typing import Any, AsyncIterator, Literal, Optional, Tuple
 
 import arro3.core
 
+from rustac import Catalog, Collection, Item, ItemCollection
+
 class RustacError(Exception):
     """A package-specific exception."""
 
@@ -144,7 +148,7 @@ class DuckdbClient:
             >>> data_frame = GeoDataFrame.from_arrow(table)
         """
 
-    def get_collections(self, href: str) -> list[dict[str, Any]]:
+    def get_collections(self, href: str) -> list[Collection]:
         """Returns all collections in this stac-geoparquet file.
 
         These collections will be auto-generated from the STAC items, one
@@ -215,7 +219,7 @@ async def read(
 
 def from_arrow(
     table: arro3.core.Table,
-) -> dict[str, Any]:
+) -> ItemCollection:
     """
     Converts an [arro3.core.Table][] to a STAC item collection.
 
@@ -229,7 +233,7 @@ def from_arrow(
     """
 
 def to_arrow(
-    items: list[dict[str, Any]] | dict[str, Any],
+    items: list[Item] | ItemCollection,
 ) -> arro3.core.Table:
     """
     Converts items to an [arro3.core.Table][].
@@ -260,7 +264,7 @@ async def search(
     query: Optional[dict[str, Any]] = None,
     use_duckdb: Optional[bool] = None,
     **kwargs: str,
-) -> list[dict[str, Any]]:
+) -> dict[str, Any]:
     """
     Searches a STAC API server.
 
@@ -299,10 +303,10 @@ async def search(
         kwargs: Additional parameters to pass in to the search.
 
     Returns:
-        A list of the returned STAC items.
+        A feature collection of the returned STAC items.
 
     Examples:
-        >>> items = await rustac.search(
+        >>> item_collection = await rustac.search(
         ...     "https://landsatlook.usgs.gov/stac-server",
         ...     collections=["landsat-c2l2-sr"],
         ...     intersects={"type": "Point", "coordinates": [-105.119, 40.173]},
@@ -387,7 +391,7 @@ async def search_to(
 
 def walk(
     container: dict[str, Any],
-) -> AsyncIterator[tuple[dict[str, Any], list[dict[str, Any]], list[dict[str, Any]]]]:
+) -> AsyncIterator[tuple[Catalog | Collection, list[Catalog | Collection], list[Item]]]:
     """Recursively walks a STAC catalog or collection breadth-first.
 
     Args:

tests/conftest.py

@@ -1,8 +1,8 @@
 import json
 from pathlib import Path
-from typing import Any
 
 import pytest
+from rustac import Item
 
 
 @pytest.fixture
@@ -26,6 +26,6 @@ def data(root: Path) -> Path:
 
 
 @pytest.fixture
-def item(examples: Path) -> dict[str, Any]:
+def item(examples: Path) -> Item:
     with open(examples / "simple-item.json") as f:
         return json.load(f)

tests/test_arrow.py

@@ -1,13 +1,12 @@
-from typing import Any
-
 import pytest
 import rustac
 from geopandas import GeoDataFrame
+from rustac import Item
 
 pytest.importorskip("arro3.core")
 
 
-def test_to_arrow(item: dict[str, Any]) -> None:
+def test_to_arrow(item: Item) -> None:
     table = rustac.to_arrow([item])
     data_frame = GeoDataFrame.from_arrow(table)
     assert len(data_frame) == 1