Add flag parameter type to index function metadata (closes #188)

climix/metadata.py

@@ -86,14 +86,53 @@ def build_variable(name, variable, path):
 
 
 class ParameterKind(Enum):
-    QUANTITY = 'quantity'
+    FLAG = 'flag'
     OPERATOR = 'operator'
+    QUANTITY = 'quantity'
     REDUCER = 'reducer'
 
 
 PARAMETER_KINDS = {}
 
 
+@dataclass
+class ParameterFlag:
+    name: str
+    flag: bool
+    kind: ParameterKind = ParameterKind.FLAG
+
+    @property
+    def parameter(self):
+        return self.flag
+
+    def instantiate(self, parameters):
+        return ParameterFlag(
+            ParameterKind.FLAG,
+            self.flag)
+
+
+PARAMETER_KINDS['flag'] = ParameterFlag
+
+
+@dataclass
+class ParameterOperator:
+    name: str
+    operator: str
+    kind: ParameterKind = ParameterKind.OPERATOR
+
+    @property
+    def parameter(self):
+        return self.operator
+
+    def instantiate(self, parameters):
+        return ParameterOperator(
+            ParameterKind.OPERATOR,
+            self.operator)
+
+
+PARAMETER_KINDS['operator'] = ParameterOperator
+
+
 @dataclass
 class ParameterQuantity:
     var_name: str
@@ -132,25 +171,6 @@ class ParameterQuantity:
 PARAMETER_KINDS['quantity'] = ParameterQuantity
 
 
-@dataclass
-class ParameterOperator:
-    name: str
-    operator: str
-    kind: ParameterKind = ParameterKind.OPERATOR
-
-    @property
-    def parameter(self):
-        return self.operator
-
-    def instantiate(self, parameters):
-        return ParameterOperator(
-            ParameterKind.OPERATOR,
-            self.operator)
-
-
-PARAMETER_KINDS['operator'] = ParameterOperator
-
-
 @dataclass
 class ParameterReducer:
     name: str