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| from langgraph.graph import StateGraph | |
| from langgraph.prebuilt import tools_condition | |
| from src.langgraph_agentic_ai.state.state import State | |
| from langgraph.graph import START,END | |
| from src.langgraph_agentic_ai.nodes.basic_chatbot_node import BasicChatbotNode | |
| from src.langgraph_agentic_ai.tools.search_tool import get_tools,create_tool_node | |
| from langgraph.prebuilt import tools_condition,ToolNode | |
| from src.langgraph_agentic_ai.nodes.chatbot_with_tool_node import chatbotwithToolNode | |
| from src.langgraph_agentic_ai.nodes.ai_news_node import AiNewsNode | |
| class GraphBuilder: | |
| def __init__(self,model): | |
| self.llm=model | |
| # Provide the required state schema to StateGraph constructor | |
| self.graph_builder=StateGraph(State) | |
| def basic_chatbot_build_graph(self): | |
| """ | |
| builds a basic chatbot using Langgraph | |
| This method initializes a chatbot node using the 'BasicChatbotNode' class | |
| and integrates it into the graph. The chatbot node is set as both the | |
| entry and exit point of the graph | |
| """ | |
| self.basic_chatbot_node=BasicChatbotNode(self.llm) | |
| self.graph_builder.add_node("chatbot",self.basic_chatbot_node.process) | |
| self .graph_builder.add_edge(START,"chatbot") | |
| self .graph_builder.add_edge("chatbot",END) | |
| def chatbot_with_tools_build_graph(self): | |
| """ | |
| Builds an advanced chatbot graph with tool integration. | |
| This method creates a chatbot graph that includes both a chatbot node | |
| and a tool node. It defines tools, initializes the chatbot with tool | |
| capabilities, and sets up conditional and direct edges between nodes. | |
| The chatbot node is set as the entry point. | |
| """ | |
| ## Define the tool and tool node | |
| tools=get_tools() | |
| tool_node=create_tool_node(tools) | |
| ## Define the LLM | |
| llm=self.llm | |
| ## Define the chatbot node | |
| obj_chatbot_with_node=chatbotwithToolNode(llm) | |
| chatbot_node=obj_chatbot_with_node.create_chatbot(tools) | |
| ## Add nodes | |
| self.graph_builder.add_node("chatbot",chatbot_node) | |
| self.graph_builder.add_node("tools",tool_node) | |
| self.graph_builder.add_edge(START,"chatbot") | |
| self.graph_builder.add_conditional_edges("chatbot",tools_condition) | |
| self.graph_builder.add_edge("tools","chatbot") | |
| self.graph_builder.add_edge("chatbot",END) | |
| def ai_news_builder_graph(self): | |
| ai_news_node=AiNewsNode(self.llm) | |
| self.graph_builder.add_node("fetch_news",ai_news_node.fetch_news) | |
| self.graph_builder.add_node("summarize_news",ai_news_node.summarize_news) | |
| self.graph_builder.add_node("save_result",ai_news_node.save_result) | |
| self.graph_builder.set_entry_point("fetch_news") | |
| self.graph_builder.add_edge("fetch_news","summarize_news") | |
| self.graph_builder.add_edge("summarize_news","save_result") | |
| self.graph_builder.add_edge("save_result",END) | |
| def setup_graph(self,usecase:str): | |
| """ | |
| Sets up the graph for the selected use case | |
| """ | |
| if usecase == "Basic Chatbot": | |
| self.basic_chatbot_build_graph() | |
| if usecase == "Chatbot with WebSearch": | |
| self.chatbot_with_tools_build_graph() | |
| if usecase == "AI News": | |
| self.ai_news_builder_graph() | |
| return self.graph_builder.compile() | |