Fix: allow : characters in xarray reader's sel parameter (#1336)

* add failing test

* fix: allow : characters in xarray sel parameters

resolves #1335

* chore: update changelog

* add one more test

* add one more test

* update changelog

---------

Co-authored-by: vincentsarago <vincent.sarago@gmail.com>

Author: hrodmn

CHANGES.md

@@ -6,6 +6,10 @@
 
 * change: rio-tiler requirement to `>=9.0.0rc2,<10.0`
 
+### titiler.xarray
+
+* fix: allow `:` characters in xarray reader's `sel` parameter (e.g. for timestamps) (https://github.com/developmentseed/titiler/pull/1336)
+
 ### titiler.mosaic
 
 * fix: `pixel-selection` method initialization to avoid FastAPI caching (author @raster-blaster, https://github.com/developmentseed/titiler/pull/1334)

src/titiler/xarray/tests/test_dependencies.py

@@ -57,3 +57,18 @@ def endpoint(
         response = client.get("/", params={"sel": ["yo=nearest::yo", "ye=ye"]})
         params = response.json()
         assert params == {"sel": ["yo=nearest::yo", "ye=ye"]}
+
+        response = client.get(
+            "/", params={"sel": ["yo=nearest::2023-01-01T00:00:00", "ye=ye"]}
+        )
+        params = response.json()
+        assert params == {"sel": ["yo=nearest::2023-01-01T00:00:00", "ye=ye"]}
+
+        response = client.get(
+            "/", params={"sel": ["yo=2023-01-01T00:00:00::nearest", "ye=ye"]}
+        )
+        assert response.status_code == 422
+
+        response = client.get("/", params={"sel": ["yo=2023-01-01T00:00:00", "ye=ye"]})
+        params = response.json()
+        assert params == {"sel": ["yo=2023-01-01T00:00:00", "ye=ye"]}

src/titiler/xarray/tests/test_io_tools.py

@@ -384,6 +384,17 @@ def test_io_open_zarr(src_path, options):
                 {"dimension": "level", "values": ["10"], "method": "nearest"},
             ],
         ),
+        (
+            ["time=nearest::2022-01-01T00:00:00", "level=nearest::10"],
+            [
+                {
+                    "dimension": "time",
+                    "values": ["2022-01-01T00:00:00"],
+                    "method": "nearest",
+                },
+                {"dimension": "level", "values": ["10"], "method": "nearest"},
+            ],
+        ),
         ([], []),
     ],
 )

src/titiler/xarray/titiler/xarray/dependencies.py

@@ -35,7 +35,7 @@ class XarrayIOParams(DefaultDependency):
 SelDimStr = Annotated[
     str,
     StringConstraints(
-        pattern=r"^[^=]+=((nearest|pad|ffill|backfill|bfill)::)?[^=::]+$"
+        pattern=r"^[^=]+=((nearest|pad|ffill|backfill|bfill)::)?([^=:]|:[^:])+$"
     ),
 ]