Format some parameters as <textarea>.

server/llm_ops.py

@@ -15,11 +15,11 @@ def chat(*args, **kwargs):
   return CACHE[key]
 
 @ops.op("Input")
-def input(*, filename: str, key: str):
+def input(*, filename: ops.PathStr, key: str):
   return pd.read_csv(filename).rename(columns={key: 'text'})
 
 @ops.op("Create prompt")
-def create_prompt(input, *, template: str):
+def create_prompt(input, *, template: ops.LongStr):
   assert template, 'Please specify the template. Refer to columns using their names in uppercase.'
   df = input.copy()
   prompts = []

server/ops.py

@@ -15,12 +15,21 @@ typeof = type # We have some arguments called "type".
 def type_to_json(t):
   if isinstance(t, type) and issubclass(t, enum.Enum):
     return {'enum': list(t.__members__.keys())}
-  if isinstance(t, tuple) and t[0] == 'collapsed':
-    return {'collapsed': str(t[1])}
+  if getattr(t, '__metadata__', None):
+    return t.__metadata__[0]
   return {'type': str(t)}
 Type = Annotated[
   typing.Any, pydantic.PlainSerializer(type_to_json, return_type=dict)
 ]
+LongStr = Annotated[
+  str, {'format': 'textarea'}
+]
+PathStr = Annotated[
+  str, {'format': 'path'}
+]
+CollapsedStr = Annotated[
+  str, {'format': 'collapsed'}
+]
 class BaseConfig(pydantic.BaseModel):
   model_config = pydantic.ConfigDict(
     arbitrary_types_allowed=True,
@@ -40,7 +49,7 @@ class Parameter(BaseConfig):
 
   @staticmethod
   def collapsed(name, default, type=None):
-    return Parameter.basic(name, default, ('collapsed', type or typeof(default)))
+    return Parameter.basic(name, default, CollapsedStr)
 
   @staticmethod
   def basic(name, default=None, type=None):

web/src/NodeParameter.svelte

@@ -7,10 +7,15 @@
 
 <label class="param">
   <span class="param-name">{name.replace(/_/g, ' ')}</span>
-  {#if meta?.type?.collapsed}
+  {#if meta?.type?.format === 'collapsed'}
     <button class="collapsed-param form-control form-control-sm">
       ⋯
     </button>
+  {:else if meta?.type?.format === 'textarea'}
+    <textarea class="form-control form-control-sm"
+    value={value}
+    on:change={(evt) => onChange(evt.currentTarget.value)}
+    />
   {:else if meta?.type?.enum}
     <select class="form-select form-select-sm"
       value={value || meta.type.enum[0]}