Figma 集成 - Docs by LangChain

Figma is a collaborative web application for interface design.

本 notebook 介绍如何load data from the Figma REST API into a format that can be ingested into LangChain, along with example usage for code generation.

import os

from langchain.indexes import VectorstoreIndexCreator
from langchain_community.document_loaders.figma import FigmaFileLoader
from langchain_core.prompts.chat import (
    ChatPromptTemplate,
    HumanMessagePromptTemplate,
    SystemMessagePromptTemplate,
)
from langchain_openai import ChatOpenAI

Figma API 需要访问令牌、node_ids 和文件密钥。文件密钥可以从 URL 中获取。www.figma.com/file/{filekey}/sampleFilename Node ID 也可以在 URL 中找到。点击任何内容并查找 ‘?node-id={node_id}’ 参数。 Access token instructions are in the Figma help center article: help.figma.com/hc/en-us/articles/8085703771159-Manage-personal-access-tokens

figma_loader = FigmaFileLoader(
    os.environ.get("ACCESS_TOKEN"),
    os.environ.get("NODE_IDS"),
    os.environ.get("FILE_KEY"),
)

# see https://python.langchain.com/en/latest/modules/data_connection/getting_started.html for more details
index = VectorstoreIndexCreator().from_loaders([figma_loader])
figma_doc_retriever = index.vectorstore.as_retriever()

def generate_code(human_input):
    # I have no idea if the Jon Carmack thing makes for better code. YMMV.
    # See https://python.langchain.com/en/latest/modules/models/chat/getting_started.html for chat info
    system_prompt_template = """You are expert coder Jon Carmack. Use the provided design context to create idiomatic HTML/CSS code as possible based on the user request.
    Everything must be inline in one file and your response must be directly renderable by the browser.
    Figma file nodes and metadata: {context}"""

    human_prompt_template = "Code the {text}. Ensure it's mobile responsive"
    system_message_prompt = SystemMessagePromptTemplate.from_template(
        system_prompt_template
    )
    human_message_prompt = HumanMessagePromptTemplate.from_template(
        human_prompt_template
    )
    # delete the gpt-4 model_name to use the default gpt-3.5 turbo for faster results
    gpt_4 = ChatOpenAI(temperature=0.02, model_name="gpt-4")
    # Use the retriever's 'get_relevant_documents' method if needed to filter down longer docs
    relevant_nodes = figma_doc_retriever.invoke(human_input)
    conversation = [system_message_prompt, human_message_prompt]
    chat_prompt = ChatPromptTemplate.from_messages(conversation)
    response = gpt_4(
        chat_prompt.format_prompt(
            context=relevant_nodes, text=human_input
        ).to_messages()
    )
    return response

response = generate_code("page top header")

在 response.content 中返回以下内容：

<!DOCTYPE html>\n<html lang="en">\n<head>\n    <meta charset="UTF-8">\n    <meta name="viewport" content="width=device-width, initial-scale=1.0">\n    <style>\n        @import url(\'https://fonts.googleapis.com/css2?family=DM+Sans:wght@500;700&family=Inter:wght@600&display=swap\');\n\n        body {\n            margin: 0;\n            font-family: \'DM Sans\', sans-serif;\n        }\n\n        .header {\n            display: flex;\n            justify-content: space-between;\n            align-items: center;\n            padding: 20px;\n            background-color: #fff;\n            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);\n        }\n\n        .header h1 {\n            font-size: 16px;\n            font-weight: 700;\n            margin: 0;\n        }\n\n        .header nav {\n            display: flex;\n            align-items: center;\n        }\n\n        .header nav a {\n            font-size: 14px;\n            font-weight: 500;\n            text-decoration: none;\n            color: #000;\n            margin-left: 20px;\n        }\n\n        @media (max-width: 768px) {\n            .header nav {\n                display: none;\n            }\n        }\n    </style>\n</head>\n<body>\n    <header class="header">\n        <h1>Company Contact</h1>\n        <nav>\n            <a href="#">Lorem Ipsum</a>\n            <a href="#">Lorem Ipsum</a>\n            <a href="#">Lorem Ipsum</a>\n        </nav>\n    </header>\n</body>\n</html>

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