Add USD price search

tutor/database.py

@@ -171,6 +171,19 @@ async def advanced_search(
             if criterion.operator == tutor.search.Operator.gte:
                 constraints.append(f"cards.rarity >= %({param})s::rarity")
                 params[param] = criterion.rarity.value
+        if isinstance(criterion, tutor.search.PriceUSD):
+            if criterion.operator == tutor.search.Operator.gte:
+                constraints.append(
+                    f'(("copies"."isFoil" AND cards.price_usd_foil >= %({param})s)'
+                    f'OR (NOT "copies"."isFoil" AND cards.price_usd >= %({param})s))'
+                )
+                params[param] = criterion.price
+            if criterion.operator == tutor.search.Operator.lte:
+                constraints.append(
+                    f'(("copies"."isFoil" AND cards.price_usd_foil <= %({param})s)'
+                    f'OR (NOT "copies"."isFoil" AND cards.price_usd <= %({param})s))'
+                )
+                params[param] = criterion.price
         if isinstance(criterion, tutor.search.Oracle):
             constraints.append(f"cards.oracle_text ILIKE %({param})s")
             params[param] = f"%{criterion.text}%"

tutor/search.py

@@ -44,6 +44,11 @@ class Oracle(Criterion):
     text: parsy.string
 
 
+@dataclasses.dataclass
+class PriceUSD(Criterion):
+    price: parsy.string
+
+
 @dataclasses.dataclass
 class Collection(Criterion):
     text: parsy.string
@@ -180,6 +185,12 @@ collection = parsy.seq(
     text=string_literal,
 ).combine_dict(Collection)
 
+price_usd = parsy.seq(
+    _keyword=lstring_from("usd"),
+    operator=gte | lte,
+    price=string_literal,
+).combine_dict(PriceUSD)
+
 
 exact_name = parsy.seq(_prefix=lstring_from("!"), text=string_literal).combine_dict(
     functools.partial(Name, operator=Operator.matches)
@@ -188,7 +199,9 @@ partial_name = parsy.seq(text=string_literal).combine_dict(Name)
 
 name = exact_name | partial_name
 
-criterion = colors | expansion | rarity | type_line | oracle | collection | name
+criterion = (
+    colors | expansion | rarity | type_line | oracle | collection | price_usd | name
+)
 
 padding = parsy.regex(r"\s*")
 search = padding >> (criterion << padding).many().map(Search)