lsst-sqre · stvoutsin · Dec 16, 2024
diff --git a/changelog.d/20241216_192656_steliosvoutsinas_DM_46975.md b/changelog.d/20241216_192656_steliosvoutsinas_DM_46975.md
@@ -0,0 +1,6 @@
+<!-- Delete the sections that don't apply -->
+
+### New features
+
+- Now reads bands information from obscore config
+- Fix some of the self-descirption documentation (calibs and remove specify statements)
diff --git a/src/sia/models/sia_query_params.py b/src/sia/models/sia_query_params.py
@@ -14,6 +14,7 @@
 from ..models.common import CaseInsensitiveEnum
 
 __all__ = [
+    "BandInfo",
     "BaseQueryParams",
     "CalibLevel",
     "DPType",
@@ -66,6 +67,48 @@ class Polarization(CaseInsensitiveEnum):
     YX = "YX"
 
 
+@dataclass
+class BandInfo:
+    """A class to represent a band's wavelength range.
+
+    Attributes
+    ----------
+    label
+        The band's label.
+    low
+        The low end of the band's wavelength range.
+    high
+        The high end of the band's wavelength range.
+    """
+
+    label: str
+    low: float
+    high: float
+
+    @property
+    def midpoint(self) -> float:
+        """Calculate the midpoint of the band's wavelength range.
+
+        Returns
+        -------
+        float
+            The midpoint of the band's wavelength range
+        """
+        return (self.low + self.high) / 2
+
+    @property
+    def formatted_midpoint(self) -> str:
+        """Return the midpoint formatted in scientific notation.
+
+        Returns
+        -------
+        str
+            The midpoint formatted in scientific notation
+        """
+        nm_value = self.midpoint * 1e9
+        return f"{nm_value:.1f}e-9"
+
+
 class BaseQueryParams(ABC):
     """Base class for query parameters."""
 

diff --git a/src/sia/services/response_handler.py b/src/sia/services/response_handler.py
@@ -16,6 +16,7 @@
 from ..constants import RESULT_NAME as RESULT
 from ..factory import Factory
 from ..models.data_collections import ButlerDataCollection
+from ..models.sia_query_params import BandInfo
 from ..services.votable import VotableConverterService
 
 logger = structlog.get_logger(__name__)
@@ -32,6 +33,34 @@
 class ResponseHandlerService:
     """Service for handling the SIAv2 query response."""
 
+    @staticmethod
+    def _generate_band_info(
+        spectral_ranges: dict[str, tuple[float | None, float | None]],
+    ) -> list[BandInfo]:
+        """Generate band information from spectral ranges dictionary.
+
+        Parameters
+        ----------
+        spectral_ranges
+            The spectral ranges dictionary.
+
+        Returns
+        -------
+        list[BandInfo]
+            The list of BandInfo objects.
+        """
+        bands = []
+        for band_name, (low, high) in spectral_ranges.items():
+            if low is not None and high is not None:
+                # The Rubin label is hardcoded here, but it could be
+                # parameterized if needed in the future.
+                bands.append(
+                    BandInfo(
+                        label=f"Rubin band {band_name}", low=low, high=high
+                    )
+                )
+        return bands
+
     @staticmethod
     def self_description_response(
         request: Request,
@@ -59,6 +88,10 @@ def self_description_response(
         Response
             The response containing the self-description.
         """
+        bands = ResponseHandlerService._generate_band_info(
+            obscore_config.spectral_ranges
+        )
+
         return _TEMPLATES.TemplateResponse(
             request,
             "self_description.xml",
@@ -77,6 +110,7 @@ def self_description_response(
                     "query", collection_name=butler_collection.name
                 ),
                 "facility_name": obscore_config.facility_name.strip(),
+                "bands": bands,
             },
             headers={
                 "content-disposition": f"attachment; filename={RESULT}.xml",

diff --git a/src/sia/templates/self_description.xml b/src/sia/templates/self_description.xml
@@ -5,16 +5,18 @@
   <RESOURCE type="meta" utype="adhoc:this">
     <DESCRIPTION>Self description and list of supported parameters</DESCRIPTION>
     <GROUP name="inputParams">
-      <PARAM name="BAND" datatype="double" arraysize="2" unit="m" xtype="interval">
-        <DESCRIPTION>Energy bounds</DESCRIPTION>
+      <PARAM name="BAND" datatype="float" arraysize="2*" xtype="interval">
+        <DESCRIPTION>Wavelength/filter band selection</DESCRIPTION>
+        {%- for band in bands %}
+        <OPTION name="{{ band.label }}" value="{{ band.formatted_midpoint }}"/>
+        {%- endfor %}
       </PARAM>
       <PARAM name="CALIB" datatype="int" arraysize="*">
         <DESCRIPTION>Calibration level</DESCRIPTION>
         <VALUES type="actual">
-          <OPTION value="0"/>
-          <OPTION value="1"/>
-          <OPTION value="2"/>
-          <OPTION value="3"/>
+          <OPTION value="1" name="Raw Data"/>
+          <OPTION value="2" name="PVIs"/>
+          <OPTION value="3" name="Coadds and Difference Images"/>
         </VALUES>
       </PARAM>
       <PARAM name="COLLECTION" datatype="char" arraysize="*">
@@ -81,10 +83,10 @@
         </VALUES>
       </PARAM>
       <PARAM name="SPATRES" datatype="double" arraysize="2" unit="arcsec" xtype="interval">
-        <DESCRIPTION>Specify position resolution</DESCRIPTION>
+        <DESCRIPTION>Position resolution</DESCRIPTION>
       </PARAM>
       <PARAM name="SPECRP" datatype="double" arraysize="2" xtype="interval">
-        <DESCRIPTION>Specify energy resolving power</DESCRIPTION>
+        <DESCRIPTION>Energy resolving power</DESCRIPTION>
       </PARAM>
       <PARAM name="TARGET" datatype="char" arraysize="*">
         <DESCRIPTION>Target name</DESCRIPTION>
@@ -121,7 +123,7 @@
         <DESCRIPTION>Product type (e.g. science, calibration, auxiliary, preview, info)</DESCRIPTION>
       </FIELD>
       <FIELD name="calib_level" datatype="short" ucd="meta.code;obs.calib" utype="obscore:obsdataset.caliblevel">
-        <DESCRIPTION>Calibration level of the observation: in {0, 1, 2, 3, 4}</DESCRIPTION>
+        <DESCRIPTION>Calibration level of the observation: in {1, 2, 3}</DESCRIPTION>
       </FIELD>
       <FIELD name="dataproduct_type" datatype="char" arraysize="*" ucd="meta.id" utype="obscore:obsdataset.dataproducttype">
         <DESCRIPTION>Data product (file content) primary type</DESCRIPTION>
@@ -198,4 +200,4 @@
       </DATA>
     </TABLE>
   </RESOURCE>
-</VOTABLE>
+</VOTABLE>
diff --git a/tests/handlers/external/external_test.py b/tests/handlers/external/external_test.py
@@ -12,6 +12,7 @@
 
 from sia.config import config
 from sia.constants import RESULT_NAME
+from sia.models.sia_query_params import BandInfo
 from tests.support.butler import MockButler, MockButlerQueryService
 from tests.support.constants import EXCEPTION_MESSAGES
 from tests.support.validators import validate_votable_error
@@ -240,12 +241,29 @@ async def test_query_maxrec_zero(
     )
     templates_dir = Jinja2Templates(template_dir)
 
+    bands = [
+        BandInfo(label="Rubin band HSC-G", low=406.0e-9, high=545.0e-9),
+        BandInfo(label="Rubin band HSC-R", low=543.0e-9, high=693.0e-9),
+        BandInfo(label="Rubin band HSC-R2", low=542.0e-9, high=693.0e-9),
+        BandInfo(label="Rubin band HSC-I", low=690.0e-9, high=842.0e-9),
+        BandInfo(label="Rubin band HSC-I2", low=692.0e-9, high=850.0e-9),
+        BandInfo(label="Rubin band HSC-Z", low=852.0e-9, high=928.0e-9),
+        BandInfo(label="Rubin band HSC-Y", low=937.0e-9, high=1015.0e-9),
+        BandInfo(label="Rubin band N921", low=914.7e-9, high=928.1e-9),
+        BandInfo(label="Rubin band g", low=406.0e-9, high=545.0e-9),
+        BandInfo(label="Rubin band r", low=542.0e-9, high=693.0e-9),
+        BandInfo(label="Rubin band i", low=692.0e-9, high=850.0e-9),
+        BandInfo(label="Rubin band z", low=852.0e-9, high=928.0e-9),
+        BandInfo(label="Rubin band y", low=937.0e-9, high=1015.0e-9),
+    ]
+
     context = {
         "instruments": ["HSC"],
         "collections": ["LSST.CI"],
         "resource_identifier": "ivo://rubin//ci_hsc_gen3",
         "access_url": "https://example.com/api/sia/hsc/query",
         "facility_name": "Subaru",
+        "bands": bands,
     }
 
     template_rendered = templates_dir.get_template(

diff --git a/tests/models/sia_params_test.py b/tests/models/sia_params_test.py
@@ -6,6 +6,7 @@
 
 from sia.models.common import CaseInsensitiveEnum
 from sia.models.sia_query_params import (
+    BandInfo,
     CalibLevel,
     DPType,
     Polarization,
@@ -135,6 +136,64 @@ async def test_sia_params_default_values() -> None:
     assert params.responseformat is None
 
 
+def test_band_info_initialization() -> None:
+    """Test proper initialization of BandInfo."""
+    band = BandInfo(label="Rubin band u", low=330.0e-9, high=400.0e-9)
+    assert band.label == "Rubin band u"
+    assert band.low == 330.0e-9
+    assert band.high == 400.0e-9
+
+
+def test_band_info_midpoint_calculation() -> None:
+    """Test midpoint calculations for different bands."""
+    band_u = BandInfo(label="Rubin band u", low=330.0e-9, high=400.0e-9)
+    expected_u_midpoint = (330.0e-9 + 400.0e-9) / 2
+    assert band_u.midpoint == expected_u_midpoint
+
+    band_y = BandInfo(label="Rubin band y", low=970.0e-9, high=1060.0e-9)
+    expected_y_midpoint = (970.0e-9 + 1060.0e-9) / 2
+    assert band_y.midpoint == expected_y_midpoint
+
+
+def test_band_info_formatted_midpoint() -> None:
+    """Test formatted midpoint string representations."""
+    test_cases = [
+        {
+            "label": "Rubin band u",
+            "low": 330.0e-9,
+            "high": 400.0e-9,
+            "expected": "365.0e-9",
+        },
+        {
+            "label": "Rubin band g",
+            "low": 402.0e-9,
+            "high": 552.0e-9,
+            "expected": "477.0e-9",
+        },
+        {
+            "label": "Rubin band y",
+            "low": 970.0e-9,
+            "high": 1060.0e-9,
+            "expected": "1015.0e-9",
+        },
+    ]
+
+    for case in test_cases:
+        low = (
+            float(case["low"])
+            if isinstance(case["low"], (int | float))
+            else 0.0
+        )
+        high = (
+            float(case["high"])
+            if isinstance(case["high"], (int | float))
+            else 0.0
+        )
+
+        band = BandInfo(label=str(case["label"]), low=low, high=high)
+        assert band.formatted_midpoint == case["expected"]
+
+
 @pytest.fixture
 def sample_sia_params() -> SIAQueryParams:
     return SIAQueryParams(

diff --git a/tests/templates/self_description.xml b/tests/templates/self_description.xml
@@ -5,16 +5,18 @@
   <RESOURCE type="meta" utype="adhoc:this">
     <DESCRIPTION>Self description and list of supported parameters</DESCRIPTION>
     <GROUP name="inputParams">
-      <PARAM name="BAND" datatype="double" arraysize="2" unit="m" xtype="interval">
-        <DESCRIPTION>Energy bounds</DESCRIPTION>
+      <PARAM name="BAND" datatype="float" arraysize="2*" xtype="interval">
+        <DESCRIPTION>Wavelength/filter band selection</DESCRIPTION>
+        {%- for band in bands %}
+        <OPTION name="{{ band.label }}" value="{{ band.formatted_midpoint }}"/>
+        {%- endfor %}
       </PARAM>
       <PARAM name="CALIB" datatype="int" arraysize="*">
         <DESCRIPTION>Calibration level</DESCRIPTION>
         <VALUES type="actual">
-          <OPTION value="0"/>
-          <OPTION value="1"/>
-          <OPTION value="2"/>
-          <OPTION value="3"/>
+          <OPTION value="1" name="Raw Data"/>
+          <OPTION value="2" name="PVIs"/>
+          <OPTION value="3" name="Coadds and Difference Images"/>
         </VALUES>
       </PARAM>
       <PARAM name="COLLECTION" datatype="char" arraysize="*">
@@ -81,10 +83,10 @@
         </VALUES>
       </PARAM>
       <PARAM name="SPATRES" datatype="double" arraysize="2" unit="arcsec" xtype="interval">
-        <DESCRIPTION>Specify position resolution</DESCRIPTION>
+        <DESCRIPTION>Position resolution</DESCRIPTION>
       </PARAM>
       <PARAM name="SPECRP" datatype="double" arraysize="2" xtype="interval">
-        <DESCRIPTION>Specify energy resolving power</DESCRIPTION>
+        <DESCRIPTION>Energy resolving power</DESCRIPTION>
       </PARAM>
       <PARAM name="TARGET" datatype="char" arraysize="*">
         <DESCRIPTION>Target name</DESCRIPTION>
@@ -121,7 +123,7 @@
         <DESCRIPTION>Product type (e.g. science, calibration, auxiliary, preview, info)</DESCRIPTION>
       </FIELD>
       <FIELD name="calib_level" datatype="short" ucd="meta.code;obs.calib" utype="obscore:obsdataset.caliblevel">
-        <DESCRIPTION>Calibration level of the observation: in {0, 1, 2, 3, 4}</DESCRIPTION>
+        <DESCRIPTION>Calibration level of the observation: in {1, 2, 3}</DESCRIPTION>
       </FIELD>
       <FIELD name="dataproduct_type" datatype="char" arraysize="*" ucd="meta.id" utype="obscore:obsdataset.dataproducttype">
         <DESCRIPTION>Data product (file content) primary type</DESCRIPTION>
@@ -198,4 +200,4 @@
       </DATA>
     </TABLE>
   </RESOURCE>
-</VOTABLE>
+</VOTABLE>