Update WidgetTemplate to handle basic widgets

Author: jiwon-oai

chatkit/widgets.py

@@ -4,11 +4,7 @@
 import json
 from datetime import datetime
 from pathlib import Path
-from typing import (
-    Annotated,
-    Any,
-    Literal,
-)
+from typing import Annotated, Any, Literal
 
 from jinja2 import Environment, StrictUndefined, Template
 from pydantic import (
@@ -1147,8 +1143,6 @@ class WidgetTemplate:
     ```
     """
 
-    adapter: TypeAdapter[DynamicWidgetRoot] = TypeAdapter(DynamicWidgetRoot)
-
     def __init__(self, definition: dict[str, Any]):
         self.version = definition["version"]
         if self.version != "1.0":
@@ -1163,7 +1157,7 @@ def __init__(self, definition: dict[str, Any]):
         self.data_schema = definition.get("jsonSchema", {})
 
     @classmethod
-    def from_file(cls, file_path: str) -> "WidgetTemplate":
+    def from_file(cls, file_path: str) -> WidgetTemplate:
         path = Path(file_path)
         if not path.is_absolute():
             caller_frame = inspect.stack()[1]
@@ -1178,10 +1172,19 @@ def from_file(cls, file_path: str) -> "WidgetTemplate":
     def build(
         self, data: dict[str, Any] | BaseModel | None = None
     ) -> DynamicWidgetRoot:
-        if data is None:
-            data = {}
-        if isinstance(data, BaseModel):
-            data = data.model_dump()
-        rendered = self.template.render(**data)
+        rendered = self.template.render(**self._normalize_data(data))
         widget_dict = json.loads(rendered)
-        return self.adapter.validate_python(widget_dict)
+        return TypeAdapter(DynamicWidgetRoot).validate_python(widget_dict)
+
+    def build_basic(self, data: dict[str, Any] | BaseModel | None = None) -> BasicRoot:
+        """Separate method for building basic root widgets until BasicRoot is supported for streamed widgets."""
+        rendered = self.template.render(**self._normalize_data(data))
+        widget_dict = json.loads(rendered)
+        return TypeAdapter(BasicRoot).validate_python(widget_dict)
+
+    def _normalize_data(
+        self, data: dict[str, Any] | BaseModel | None
+    ) -> dict[str, Any]:
+        if data is None:
+            return {}
+        return data.model_dump() if isinstance(data, BaseModel) else data

tests/assets/widgets/basic_root.json

@@ -0,0 +1,21 @@
+{
+  "type": "Basic",
+  "children": [
+    {
+      "type": "Col",
+      "gap": 1,
+      "children": [
+        {
+          "type": "Title",
+          "value": "Harry Potter",
+          "size": "sm"
+        },
+        {
+          "type": "Text",
+          "value": "The boy who lived",
+          "size": "sm"
+        }
+      ]
+    }
+  ]
+}

tests/assets/widgets/basic_root.widget

@@ -0,0 +1,46 @@
+{
+  "version": "1.0",
+  "name": "Author preview",
+  "template": "{\"type\":\"Basic\",\"children\":[{\"type\":\"Col\",\"gap\":1,\"children\":[{\"type\":\"Title\",\"value\":{{ (name) | tojson }},\"size\":\"sm\"},{\"type\":\"Text\",\"value\":{{ (bio) | tojson }},\"size\":\"sm\"}]}]}",
+  "jsonSchema": {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "type": "object",
+    "properties": {
+      "name": {
+        "type": "string",
+        "minLength": 1
+      },
+      "bio": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "required": [
+      "name",
+      "bio"
+    ],
+    "additionalProperties": false
+  },
+  "outputJsonPreview": {
+    "type": "Basic",
+    "children": [
+      {
+        "type": "Col",
+        "gap": 1,
+        "children": [
+          {
+            "type": "Title",
+            "value": "Harry Potter",
+            "size": "sm"
+          },
+          {
+            "type": "Text",
+            "value": "The boy who lived",
+            "size": "sm"
+          }
+        ]
+      }
+    ]
+  },
+  "encodedWidget": "eyJpZCI6IndpZ194djV6dGlxayIsIm5hbWUiOiJBdXRob3IgcHJldmlldyIsInZpZXciOiI8QmFzaWM-XG4gIDxDb2wgZ2FwPXsxfT5cbiAgICA8VGl0bGUgdmFsdWU9e25hbWV9IHNpemU9XCJzbVwiIC8-XG4gICAgPFRleHQgdmFsdWU9e2Jpb30gc2l6ZT1cInNtXCIgLz5cbiAgPC9Db2w-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"
+}

tests/test_widgets.py

@@ -7,6 +7,7 @@
 from chatkit.server import diff_widget
 from chatkit.types import WidgetItem
 from chatkit.widgets import (
+    BasicRoot,
     Card,
     DynamicWidgetComponent,
     DynamicWidgetRoot,
@@ -241,3 +242,20 @@ def test_widget_template_from_file(
 
     assert isinstance(widget, DynamicWidgetRoot)
     assert widget.model_dump(exclude_none=True) == expected_widget_dict
+
+
+def test_widget_template_with_basic_root():
+    template = WidgetTemplate.from_file("assets/widgets/basic_root.widget")
+
+    with open("tests/assets/widgets/basic_root.json", "r") as file:
+        expected_widget_dict = json.load(file)
+
+    widget = template.build_basic(
+        {
+            "name": "Harry Potter",
+            "bio": "The boy who lived",
+        },
+    )
+
+    assert isinstance(widget, BasicRoot)
+    assert widget.model_dump(exclude_none=True) == expected_widget_dict