Add attribute validation functions and mapping

src/backend/langflow/interface/custom/attributes.py

@@ -0,0 +1,31 @@
+def validate_icon(value: str, *args, **kwargs):
+    # we are going to use the emoji library to validate the emoji
+    # emojis can be defined using the :emoji_name: syntax
+    if not value.startswith(":") or not value.endswith(":"):
+        warnings.warn("Invalid emoji. Please use the :emoji_name: syntax.")
+        return value
+    emoji_value = emoji.emojize(value, variant="emoji_type")
+    if value == emoji_value:
+        warnings.warn(f"Invalid emoji. {value} is not a valid emoji.")
+        return value
+    return emoji_value
+
+
+def getattr_return_str(value):
+
+    return str(value) if value else ""
+
+
+def getattr_return_bool(value):
+    if isinstance(value, bool):
+        return value
+
+
+ATTR_FUNC_MAPPING = {
+    "display_name": getattr_return_str,
+    "description": getattr_return_str,
+    "beta": getattr_return_str,
+    "documentation": getattr_return_str,
+    "icon": validate_icon,
+    "pinned": getattr_return_bool,
+}

src/backend/langflow/interface/custom/custom_component/component.py

@@ -2,9 +2,10 @@ import operator
 import warnings
 from typing import Any, ClassVar, Optional
 
-import emoji
 from cachetools import TTLCache, cachedmethod
 from fastapi import HTTPException
+
+from langflow.interface.custom.attributes import ATTR_FUNC_MAPPING
 from langflow.interface.custom.code_parser import CodeParser
 from langflow.interface.custom.eval import eval_custom_component_code
 from langflow.utils import validate
@@ -65,14 +66,6 @@ class Component:
 
         return validate.create_function(self.code, self._function_entrypoint_name)
 
-    def getattr_return_str(self, value):
-
-        return str(value) if value else ""
-
-    def getattr_return_bool(self, value):
-        if isinstance(value, bool):
-            return value
-
     def build_template_config(self) -> dict:
         if not self.code:
             return {}
@@ -80,15 +73,8 @@ class Component:
         cc_class = eval_custom_component_code(self.code)
         component_instance = cc_class()
         template_config = {}
-        attributes_func_mapping = {
-            "display_name": self.getattr_return_str,
-            "description": self.getattr_return_str,
-            "beta": self.getattr_return_str,
-            "documentation": self.getattr_return_str,
-            "icon": self.validate_icon,
-        }
 
-        for attribute, func in attributes_func_mapping.items():
+        for attribute, func in ATTR_FUNC_MAPPING.items():
             if hasattr(component_instance, attribute):
                 value = getattr(component_instance, attribute)
                 if value is not None:
@@ -96,17 +82,5 @@ class Component:
 
         return template_config
 
-    def validate_icon(self, value: str, *args, **kwargs):
-        # we are going to use the emoji library to validate the emoji
-        # emojis can be defined using the :emoji_name: syntax
-        if not value.startswith(":") or not value.endswith(":"):
-            warnings.warn("Invalid emoji. Please use the :emoji_name: syntax.")
-            return value
-        emoji_value = emoji.emojize(value, variant="emoji_type")
-        if value == emoji_value:
-            warnings.warn(f"Invalid emoji. {value} is not a valid emoji.")
-            return value
-        return emoji_value
-
     def build(self, *args: Any, **kwargs: Any) -> Any:
         raise NotImplementedError

src/backend/langflow/interface/custom/utils.py

@@ -7,7 +7,10 @@ from typing import Any, Dict, List, Optional, Union
 from uuid import UUID
 
 from fastapi import HTTPException
+from loguru import logger
+
 from langflow.field_typing.range_spec import RangeSpec
+from langflow.interface.custom.attributes import ATTR_FUNC_MAPPING
 from langflow.interface.custom.code_parser.utils import extract_inner_type
 from langflow.interface.custom.custom_component import CustomComponent
 from langflow.interface.custom.directory_reader.utils import (
@@ -22,7 +25,6 @@ from langflow.template.frontend_node.custom_components import (
 )
 from langflow.utils import validate
 from langflow.utils.util import get_base_classes
-from loguru import logger
 
 
 def add_output_types(
@@ -263,16 +265,9 @@ def run_build_config(
 
 def sanitize_template_config(template_config):
     """Sanitize the template config"""
-    attributes = {
-        "display_name",
-        "description",
-        "beta",
-        "documentation",
-        "output_types",
-        "icon",
-    }
+
     for key in template_config.copy():
-        if key not in attributes:
+        if key not in ATTR_FUNC_MAPPING.keys():
             template_config.pop(key, None)
 
     return template_config