feat: add SearxNG search engine integration with web interface

app.py

@@ -1,11 +1,12 @@
 import gradio as gr
 
 from search_engines.duckduckgo import duckduckgo_interface
+from search_engines.searxng import searxng_interface
 from search_engines.tavily import tavily_interface
 
 app = gr.TabbedInterface(
-    interface_list=[duckduckgo_interface, tavily_interface],
-    tab_names=["DuckDuckGo Search", "Tavily Search"],
+    interface_list=[duckduckgo_interface, tavily_interface, searxng_interface],
+    tab_names=["DuckDuckGo Search", "Tavily Search", "SearxNG Search"],
 )
 
 

search_engines/searxng.py

@@ -0,0 +1,57 @@
+import gradio as gr
+import pandas as pd
+from langchain_community.utilities import SearxSearchWrapper
+
+from utils.helpers import map_results
+
+
+async def searxng_search(
+    query: str, searxng_host: str, max_results: int = 5
+) -> pd.DataFrame:
+    """
+    Given a search query, returns the search results from SearxNG.
+
+    Args:
+        query (str): The search query.
+        searxng_host (str): The SearxNG host URL.
+        searxng_headers (dict): The SearxNG headers for additional metadata and authentication.
+        max_results (int, optional): The number of maximum results to return. Defaults to 5.
+
+    Returns:
+        str: The search results from SearxNG Search Engine.
+    """
+    searxng = SearxSearchWrapper(
+        searx_host=searxng_host,
+        k=max_results,
+    )
+    results = await searxng.aresults(
+        query,
+        num_results=max_results,
+    )
+    mapping = {
+        "title": "title",
+        "link": "link",
+        "snippet": "body",
+    }
+    results = await map_results(results, mapping)
+    return results
+
+
+searxng_interface = gr.Interface(
+    fn=searxng_search,
+    inputs=[
+        gr.Textbox(label="Search Query"),
+        gr.Textbox(label="SearxNG Host URL"),
+        gr.Slider(minimum=1, maximum=10, step=1, value=5, label="Number of Results"),
+    ],
+    outputs=gr.Dataframe(
+        label="Search Results",
+        headers=["title", "body", "link"],
+        show_fullscreen_button=True,
+        show_row_numbers=True,
+        show_copy_button=True,
+        wrap=True,
+    ),
+    title="SearxNG Search",
+    description="Search the web using SearxNG Search Engine.",
+)