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92
backend/app/graph/workflow.py
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92
backend/app/graph/workflow.py
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import warnings
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from langchain_core._api.deprecation import LangChainPendingDeprecationWarning
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warnings.filterwarnings("ignore", category=LangChainPendingDeprecationWarning)
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from langgraph.graph import StateGraph, END
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from app.graph.state import WorkflowState
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from app.graph.nodes import (
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pm_node,
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retrieval_node,
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dev_node,
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qa_node,
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human_review_node,
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)
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# --- Fonctions de Routage (Conditional Edges) ---
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def route_after_retrieval(state: WorkflowState):
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# Si un projet existe, on demande d'abord à l'humain (via le nœud de review)
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if state.get("existing_project"):
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return "human_review"
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return "dev"
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def route_after_qa(state: WorkflowState):
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qa_res = state.get("qa_result", {})
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# Loop 1 : Si échec des tests ET qu'on a pas dépassé 3 essais -> On renvoie chez le Dev
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if not qa_res.get("success") and state.get("loop_count", 0) < 3:
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return "dev"
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# Si c'est vert (ou trop d'échecs), on présente le résultat à l'utilisateur
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# EXTENSION FUTURE : si trop d'échecs, on pourrait envoyer à une IA plus puissante
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return "human_review"
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def route_after_human(state: WorkflowState):
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# Cas d'un projet existant proposé
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if state.get("existing_project") and not state.get("generated_code"):
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if state.get("existing_project_approved") == True:
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return END # L'utilisateur est satisfait du projet existant
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return "dev" # L'utilisateur refuse l'existant, on génère du neuf
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# Cas du code généré
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if state.get("is_completed") == True:
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return END
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# Si l'utilisateur a refusé le code -> Retour à la case PM avec ses commentaires
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return "pm"
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# --- Assemblage du Graphe ---
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graph = StateGraph(WorkflowState)
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graph.add_node("pm", pm_node)
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graph.add_node("retrieval", retrieval_node)
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graph.add_node("dev", dev_node)
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graph.add_node("qa", qa_node)
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graph.add_node("human_review", human_review_node)
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graph.set_entry_point("pm")
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graph.add_edge("pm", "retrieval")
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# Étape 1 : Choix après recherche vectorielle
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graph.add_conditional_edges(
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"retrieval",
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route_after_retrieval,
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{
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"dev": "dev",
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"human_review": "human_review",
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},
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)
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# Étape 2 & 3 : Boucle Dev <-> QA (Loop 1)
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graph.add_edge("dev", "qa")
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graph.add_conditional_edges(
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"qa",
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route_after_qa,
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{
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"dev": "dev",
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"human_review": "human_review",
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},
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)
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# Étape 4 : Boucle de Feedback Humain (Loop 2) ou Clôture
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graph.add_conditional_edges(
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"human_review",
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route_after_human,
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{
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"pm": "pm",
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"dev": "dev",
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END: END,
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},
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)
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compiled_graph = graph.compile()
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