react2-week1/srushti

6_nodejs/week1/avg.js

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+/* Using array destructuring method through spread syntax, the 3 commas will skip the first 3 elemnts (node, script path and operation) 
+from the command line. */
+
+const [, , , ...numbers] = process.argv;
+
+  if (numbers.length === 0 || numbers.some(isNaN)) {
+    console.error('Error: Please provide valid numbers as command line arguments.');
+  } else {
+    const average = numbers.reduce((acc, num) => acc + Number(num), 0) / numbers.length;
+    console.log('Average:', average);
+  }

6_nodejs/week1/package.json

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+{
+  "name": "week1",
+  "version": "1.0.0",
+  "description": "",
+  "main": "avg.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}

6_nodejs/week2/.gitignore

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+node_modules/

6_nodejs/week2/app.js

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+const express = require("express");
+const fs = require("fs");
+const app = express();
+const port = process.env.PORT || 3000;
+
+app.use(express.json());
+
+app.get("/search", (req, res) => {
+  const query = req.query.q;
+
+  if (!query) {
+    return res.status(400).json({ error: "No query provided" });
+  }
+
+  fs.readFile('./documents.json', 'utf8', (err, data) => {
+    if (err) {
+      console.error("Error reading JSON file:", err);
+      return res.status(500).json({ error: "Error reading JSON file" });
+    }
+
+    try {
+      const documents = JSON.parse(data);
+
+      const filteredDocuments = documents.filter((doc) => {
+        return Object.values(doc).some((value) =>
+          value && value.toString().toLowerCase().includes(query.toLowerCase())
+        );
+      });
+
+      res.json(filteredDocuments);
+    } catch (error) {
+      console.error("Error parsing JSON data:", error);
+      res.status(500).json({ error: "Error parsing JSON data" });
+    }
+  });
+});
+
+app.get("/documents/:id", (req, res) => {
+  const id = parseInt(req.params.id);
+
+  try {
+    const data = fs.readFileSync("./documents.json", "utf8");
+    const documents = JSON.parse(data);
+
+    const foundDocument = documents.find((doc) => doc.id === id);
+
+    if (foundDocument) {
+      res.json(foundDocument);
+    } else {
+      res.status(404).send("Error 404: Document not found");
+    }
+  } catch (error) {
+    console.error("Error reading JSON file:", error);
+    res.status(500).send("Error reading JSON file");
+  }
+});
+
+app.post("/search", (req, res) => {
+  const query = req.query.q;
+  const fields = req.body.fields;
+
+  if (query && fields) {
+    res.status(400).json({ error: '"query" and "fields" cannot be provided' });
+    return;
+  }
+
+  try {
+    const data = fs.readFileSync("./documents.json", "utf8");
+    const documents = JSON.parse(data);
+
+    let filteredDocuments = documents;
+
+    if (query) {
+      filteredDocuments = filteredDocuments.filter((doc) =>
+        Object.values(doc).some((value) => value.includes(query))
+      );
+    }
+
+    if (fields) {
+      filteredDocuments = filteredDocuments.filter((doc) =>
+        Object.entries(fields).every(
+          ([key, value]) => doc[key] && doc[key].toString() === value.toString()
+        )
+      );
+    }
+
+    res.json(filteredDocuments);
+  } catch (error) {
+    console.error("Error reading JSON file:", error);
+    res.status(500).json({ error: "Error reading JSON file" });
+  }
+});
+
+app.listen(port, () => {
+  console.log(`Listening on port ${port}`);
+});

6_nodejs/week2/documents.json

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+[
+  {
+    "id": 1,
+    "name": "Used Apple Airpods",
+    "price": "50",
+    "description": "Battery life is not great"
+  },
+  {
+    "id": 2,
+    "type": "doc",
+    "value": "hello world"
+  }
+]