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backend-code/index.js

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+// initialise express for cors and json
+const express = require('express');
+const cors = require('cors');
+const app = express();
+app.use(cors());
+app.use(express.json());
+const PORT = process.env.PORT || 5000;
+
+const prompt_text = "Angela is a virtual assistant of Himanshu who talks to himanshu's friends. Angela is smart, intelligent, polite, caring and can answer all questions using openai intelligence. Angela is created using gpt 3 ai model. \n\nFriend: Hi\nAngela: Hi, Angela is here. Himanshu's virtual assistant. How can I help?\nFriend: Where's Himanshu?\nAngela: Himanshu sir seems busy with coding stuff.\nFriend:"
+
+
+const { Configuration, OpenAIApi } = require("openai");
+
+const configuration = new Configuration({
+  apiKey: "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",
+});
+const openai = new OpenAIApi(configuration);
+
+// const response = await openai.createCompletion({
+//   model: "text-davinci-002",
+//   temperature: 0.7,
+//   max_tokens: 256,
+//   top_p: 1,
+//   frequency_penalty: 0,
+//   presence_penalty: 0,
+// });
+
+//setup express listener for autoresponder for wa
+app.post('/angela', async (req, res) => {
+    const message = req.body.query.message;
+    console.log(message);
+    const prompt = prompt_text + message + "\nAngela:";
+    console.log(prompt);
+    const response = await openai.createCompletion({
+        model: "text-davinci-002",
+        temperature: 0.9,
+        max_tokens: 256,
+        top_p: 1,
+        frequency_penalty: 0,
+        presence_penalty: 0.6,
+        prompt: prompt,
+        stop: [" Friend:", " Angela:"],
+        suffix: ""
+    });
+    console.log(response.data);
+    if(response.data.choices[0].text.trim()==="")
+    res.status(200).json({
+        "replies":[
+            {
+                "message": "Angela:" + "Didn't get you!"
+            }
+        ]
+    });
+    else
+res.status(200).json({
+        "replies":[
+            {
+                "message": "Angela:" + response.data.choices[0].text.trim()
+            }
+        ]
+    });
+    });
+
+// start express server
+app.listen(PORT, () => {
+    console.log('Server started on port 4000');
+}
+);

backend-code/package.json

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+{
+  "name": "angelaopenai",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "openai": "^3.0.0"
+  }
+}