feat: Add String Param & types to other params

invokeai/app/invocations/params.py

@@ -1,9 +1,12 @@
 # Copyright (c) 2023 Kyle Schouviller (https://github.com/kyle0654)
 
 from typing import Literal
+
 from pydantic import Field
-from .baseinvocation import BaseInvocation, BaseInvocationOutput, InvocationContext
-from .math import IntOutput, FloatOutput
+
+from .baseinvocation import (BaseInvocation, BaseInvocationOutput,
+                             InvocationConfig, InvocationContext)
+from .math import FloatOutput, IntOutput
 
 # Pass-through parameter nodes - used by subgraphs
 
@@ -14,6 +17,14 @@ class ParamIntInvocation(BaseInvocation):
     a: int = Field(default=0, description="The integer value")
     #fmt: on
 
+    class Config(InvocationConfig):
+      schema_extra = {
+          "ui": {
+              "tags": ["param", "integer"],
+              "title": "Integer Parameter"
+          },
+      }
+
     def invoke(self, context: InvocationContext) -> IntOutput:
         return IntOutput(a=self.a)
 
@@ -24,5 +35,36 @@ class ParamFloatInvocation(BaseInvocation):
     param: float = Field(default=0.0, description="The float value")
     #fmt: on
 
+    class Config(InvocationConfig):
+      schema_extra = {
+          "ui": {
+              "tags": ["param", "float"],
+              "title": "Float Parameter"
+          },
+      }
+
     def invoke(self, context: InvocationContext) -> FloatOutput:
         return FloatOutput(param=self.param)
+
+class StringOutput(BaseInvocationOutput):
+    """A string output"""
+    type: Literal["string_output"] = "string_output"
+    text: str = Field(default=None, description="The output string")
+
+
+class ParamStringInvocation(BaseInvocation):
+    """A string parameter"""
+    type: Literal['param_string'] = 'param_string'
+    text: str = Field(default='', description='The string value')
+
+    class Config(InvocationConfig):
+      schema_extra = {
+          "ui": {
+              "tags": ["param", "string"],
+              "title": "String Parameter"
+          },
+      }
+
+    def invoke(self) -> StringOutput:
+        return StringOutput(text=self.text)
+