ENH: IRSA: adding servicetype to list_collections

CHANGES.rst

@@ -16,6 +16,12 @@ simbad
 Service fixes and enhancements
 ------------------------------
 
+ipac.irsa
+^^^^^^^^^
+
+- Adding the "servicetype" kwarg to list_collections to be able to list SIA
+  and SSA collections separately. [#3200]
+
 ipac.nexsci.nasa_exoplanet_archive
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

astroquery/ipac/irsa/core.py

@@ -116,16 +116,39 @@
 
     query_sia.__doc__ = query_sia.__doc__.replace('_SIA2_PARAMETERS', SIA2_PARAMETERS_DESC)
 
-    def list_collections(self):
+    def list_collections(self, servicetype=None):
         """
         Return information of available IRSA SIAv2 collections to be used in ``query_sia`` queries.
 
+        Parameters
+        ----------
+        servicetype : str or None
+            Service type to list collections for. Returns all collections when not provided.
+            Currently supported service types are: 'SIA', 'SSA'.
+
         Returns
         -------
         collections : A `~astropy.table.Table` object.
             A table listing all the possible collections for IRSA SIA queries.
         """
-        query = "SELECT DISTINCT collection from caom.observation ORDER by collection"
+
+        if not servicetype:
+            query = "SELECT DISTINCT collection from caom.observation ORDER by collection"
+        else:
+            servicetype = servicetype.upper()
+            if servicetype == 'SIA':
+                query = ("SELECT DISTINCT o.collection FROM caom.observation o "
+                         "JOIN caom.plane p ON o.obsid = p.obsid "
+                         "WHERE (p.dataproducttype = 'image' OR p.dataproducttype = 'cube') "
+                         "order by collection")
+            elif servicetype == 'SSA':
+                query = ("SELECT DISTINCT o.collection FROM caom.observation o "
+                         "JOIN caom.plane p ON o.obsid = p.obsid "
+                         "WHERE (p.dataproducttype = 'spectrum' OR p.dataproducttype = 'cube') "
+                         "order by collection")
+            else:
+                raise ValueError("if specified, servicetype should be 'SIA' or 'SSA'")
+
         collections = self.query_tap(query=query)
         return collections.to_table()
 

astroquery/ipac/irsa/tests/test_irsa_remote.py

@@ -67,13 +67,18 @@ def test_list_catalogs(self):
         # (at the time of writing there are 933 tables in the list).
         assert len(catalogs) > 900
 
-    def test_list_collections(self):
-        collections = Irsa.list_collections()
+    @pytest.mark.parametrize('servicetype', (None, 'sia', 'ssa'))
+    def test_list_collections(self, servicetype):
+        collections = Irsa.list_collections(servicetype=servicetype)
         # Number of available collections may change over time, test only for significant drop.
-        # (at the time of writing there are 110 collections in the list).
-        assert len(collections) > 100
-        assert 'spitzer_seip' in collections['collection']
-        assert 'wise_allwise' in collections['collection']
+        # (at the time of writing there are 104 SIA and 35 SSA collections in the list).
+        if servicetype == 'ssa':
+            assert len(collections) > 30
+            assert 'sofia_exes' in collections['collection']
+        else:
+            assert len(collections) > 100
+            assert 'spitzer_seip' in collections['collection']
+            assert 'wise_allwise' in collections['collection']
 
     def test_tap(self):
         query = "SELECT TOP 5 ra,dec FROM cosmos2015"

docs/ipac/irsa/irsa.rst

@@ -234,13 +234,15 @@ Enhanced Imaging products in the centre of the COSMOS field as an `~astropy.tabl
 
 To list available collections for SIA queries, the
 `~astroquery.ipac.irsa.IrsaClass.list_collections` method is provided, and
-will return a `~astropy.table.Table`:
+will return a `~astropy.table.Table`. You can use the ``servicetype``
+argument to filter for image or spectral collections using ``'SIA'`` or
+``'SSA'`` respectively:
 
 .. doctest-remote-data::
 
    >>> from astroquery.ipac.irsa import Irsa
-   >>> Irsa.list_collections()
-   <Table length=124>
+   >>> Irsa.list_collections(servicetype='SIA')
+   <Table length=104>
          collection
            object
    ---------------------