Gemini Prompt Expander
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Xclbr
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import os
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import subprocess
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import google.generativeai as genai
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class GeminiPromptExpander:
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@classmethod
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def INPUT_TYPES(s):
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return {
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"required": {
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"input_text": ("STRING", {"forceInput": True}),
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},
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"optional": {
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"api_key": ("STRING", {
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"multiline": False,
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"default": "",
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}),
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},
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"hidden": {
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"unique_id": "UNIQUE_ID",
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"extra_pnginfo": "EXTRA_PNGINFO",
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},
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}
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RETURN_TYPES = ("STRING",)
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FUNCTION = "expand_prompt"
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CATEGORY = "Text"
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OUTPUT_NODE = True
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@staticmethod
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def get_api_key():
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if os.name == 'nt': # Windows
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try:
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# Use reg query to get the API key from the Windows registry
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result = subprocess.run(['reg', 'query', 'HKCU\\Environment', '/v', 'GEMINI_API_KEY'], capture_output=True, text=True)
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if result.returncode == 0:
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# Extract the API key from the output
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lines = result.stdout.strip().split('\n')
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for line in lines:
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if 'GEMINI_API_KEY' in line:
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return line.split()[-1]
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except Exception:
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pass
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return os.environ.get("GEMINI_API_KEY")
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def expand_prompt(self, input_text, api_key="", unique_id=None, extra_pnginfo=None):
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if api_key:
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# Set the API key as a system environment variable
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if os.name == 'nt': # Windows
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subprocess.run(f'setx GEMINI_API_KEY "{api_key}"', shell=True)
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else: # macOS/Linux
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os.environ["GEMINI_API_KEY"] = api_key
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with open(os.path.expanduser("~/.bashrc"), "a") as bashrc:
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bashrc.write(f'\nexport GEMINI_API_KEY="{api_key}"')
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else:
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api_key = self.get_api_key()
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if not api_key:
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raise ValueError("No API key provided. Please enter an API key or set the GEMINI_API_KEY environment variable.")
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genai.configure(api_key=api_key)
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generation_config = {
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"temperature": 1,
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"top_p": 0.95,
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"top_k": 64,
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"max_output_tokens": 150,
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"response_mime_type": "text/plain",
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}
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model = genai.GenerativeModel(
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model_name="gemini-1.5-flash",
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generation_config=generation_config,
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)
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chat_session = model.start_chat(history=[])
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prompt = f"""I will provide you a prompt to expand and visually describe. You will provide me the final prompt in the given format below. Remember to keep it under 150 words and try to describe it as best as possible so the AI can generate it perfectly visually. The output prompt must be in exact format like this (Directly start the response with Type:) -
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Type:
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Subject:
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Outfit:
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Pose & Scene:
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Extra Details:
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Background:
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Technical Details:
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Example Input Prompt - Photograph of A woman as cinderella, wearing beautiful blue dress. holding a magic wand. wearing crystal glass heels. blue eyes. cinematic.. harmonious golden ratio composition. in a whimsical, storybook setting. using soft, ambient daylight. shot on Hasselblad 500C. using cool tones
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Output Prompt -
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Type: Photograph of
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Subject: A woman dressed as cinderella. Gorgeous and pretty with blue eyes, holding a magic wand.
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Outfit: A blue royal dress, sparkling glass heels.
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Pose & Scene: Holding a magic wand, weaving magic.
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Extra Details: hollywood style cinematic scene, harmonious golden ratio composition. in a whimsical, storybook setting, using soft, ambient daylight.
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Background: forest with deers and cute animals.
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Technical Details: shot on Hasselblad 500C.
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Here is the input prompt
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Input Prompt: '{input_text}'"""
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response = chat_session.send_message(prompt)
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expanded_text = response.text
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# Update the node's widgets_values in the workflow
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if unique_id is not None and extra_pnginfo is not None:
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if isinstance(extra_pnginfo, list) and len(extra_pnginfo) > 0:
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if isinstance(extra_pnginfo[0], dict) and "workflow" in extra_pnginfo[0]:
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workflow = extra_pnginfo[0]["workflow"]
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node = next((x for x in workflow["nodes"] if str(x["id"]) == str(unique_id)), None)
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if node:
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node["widgets_values"] = [input_text, "", expanded_text] # Set API key to empty string
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return {"ui": {"text": [expanded_text], "api_key": ""}, "result": (expanded_text,)}
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@classmethod
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def IS_CHANGED(cls, input_text, api_key=""):
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return float("nan") # This ensures the node is always executed
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NODE_CLASS_MAPPINGS = {
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"GeminiPromptExpander": GeminiPromptExpander
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"GeminiPromptExpander": "Gemini Prompt Expander 🪄"
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}
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@@ -0,0 +1,57 @@
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import { app } from "../../scripts/app.js";
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import { ComfyWidgets } from "../../scripts/widgets.js";
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app.registerExtension({
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name: "Comfy.GeminiPromptExpander",
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async beforeRegisterNodeDef(nodeType, nodeData, app) {
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if (nodeData.name === "GeminiPromptExpander") {
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const onNodeCreated = nodeType.prototype.onNodeCreated;
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nodeType.prototype.onNodeCreated = function() {
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onNodeCreated?.apply(this, arguments);
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// Add a widget for expanded text
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const expandedTextWidget = ComfyWidgets.STRING(this, "Final Prompt", ["STRING", { multiline: true }], app);
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expandedTextWidget.widget.inputEl.readOnly = true;
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expandedTextWidget.widget.inputEl.style.opacity = 0.6;
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expandedTextWidget.widget.inputEl.style.minHeight = "10px";
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this.expandedTextWidget = expandedTextWidget.widget;
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// Modify the API key input behavior
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const apiKeyWidget = this.widgets.find(w => w.name === "api_key");
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if (apiKeyWidget) {
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const originalOnChange = apiKeyWidget.callback;
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apiKeyWidget.callback = function(value) {
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if (value) {
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// API key entered, trigger the node execution
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app.graph.runStep();
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}
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originalOnChange?.(value);
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};
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}
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};
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const onExecuted = nodeType.prototype.onExecuted;
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nodeType.prototype.onExecuted = function(message) {
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onExecuted?.apply(this, arguments);
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if (message && message.text && this.expandedTextWidget) {
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let expandedText = message.text[0];
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if (Array.isArray(expandedText)) {
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expandedText = expandedText.join('');
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}
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this.expandedTextWidget.value = expandedText;
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this.expandedTextWidget.inputEl.value = expandedText;
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this.expandedTextWidget.inputEl.style.height = 'auto';
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this.expandedTextWidget.inputEl.style.height = this.expandedTextWidget.inputEl.scrollHeight + 'px';
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}
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// Clear the API key input after execution
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const apiKeyWidget = this.widgets.find(w => w.name === "api_key");
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if (apiKeyWidget) {
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apiKeyWidget.value = "";
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apiKeyWidget.inputEl.value = "";
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}
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};
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}
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}
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});
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