MoodyWorld

This script configures environment variables, connects to a MongoDB database, and defines a function `run` that inserts a new schema into the ‘News’ collection of the ‘WorldNews’ database. It ensures continuous insertion even if an error occurs and closes the database connection properly after operations. The `run` function is exported for external use.

database.js:

// Load environment variables from .env file
require('dotenv').config()

// Import MongoDB client and API version management
const { MongoClient, ServerApiVersion } = require('mongodb');

// Construct MongoDB connection URI using environment variables
const uri = `mongodb+srv://${process.env.MONGO_USER}:${process.env.PASSWORD}@test.disdl6x.mongodb.net/?retryWrites=true&w=majority&appName=Test`;

// Define database and collection names
const dbName = "WorldNews";
const collection = "News";

// Initialize MongoDB client with server API settings
const client = new MongoClient(uri, {
serverApi: {
version: ServerApiVersion.v1,
strict: true,
deprecationErrors: true,
}
});

// Define an asynchronous function to insert news data into the database
async function run(newSchema) {
try {
await client.connect(); // Connect to MongoDB
console.log("Successful connection to MongoDB");
console.log(newSchema); // Log the schema to be inserted
const db = client.db(dbName); // Access the database
const usuariosCollection = db.collection(collection); // Access the collection
await usuariosCollection.insertMany(newSchema, {ordered: false}); // Insert documents into the collection
} finally {
await client.close(); // Ensure the client is closed after operation
}
}

// Export the run function for use in other modules
module.exports = {run}

This script defines an asynchronous `mainFunction` that calls `getWorldNews` to fetch news data and logs it. If an error occurs during this process, the catch block will handle and log the error, ensuring that the script provides feedback on its operation and any issues encountered.

index.js:

// Import the 'run' function from the database module
const { run } = require("./database");

// Import the 'getWorldNews' function from the apinews module
const { getWorldNews } = require("./apinews");

// Define an asynchronous function to fetch world news
async function mainFunction() {
try {
const news = await getWorldNews(); // Fetch world news
return news; // Return fetched news
} catch (error) {
console.error('Error:', error); // Log errors if fetching fails
}
}

// Define an asynchronous function to save fetched news into the database
async function saveNews() {
try {
const result = await mainFunction(); // Fetch the news using mainFunction
console.log("News fetched, saving to database..."); // Log status
await run(result); // Save the fetched news to the database using 'run' function
console.log("News saved to the database successfully."); // Log success message
} catch (error) {
console.error('Error saving news to the database:', error); // Log any errors encountered during saving
}
}

saveNews(); // Execute the function to fetch and save news

This script ensures proper handling of news documents in a MongoDB database, providing functionalities for tagging, deleting, or updating news entries based on user input. 

tagging.py:

# Import necessary modules and functions
import pymongo
import os
from bson import ObjectId # For working with MongoDB object IDs
from dotenv import load_dotenv
load_dotenv('/Users/mariana/Documents/Dev/GitHub/API-news/.env')
# Connect to the MongoDB database using environment variables
myclient = pymongo.MongoClient(f'mongodb+srv://{os.getenv("MONGO_USER")}:{os.getenv("PASSWORD")}@test.disdl6x.mongodb.net/?retryWrites=true&w&maj=rity')
mydb = myclient['WorldNews']
mycollection = mydb['News']
emotions= ["Happiness", "Sadness", "Anger", "Fear", "Surprise", "Disgust", "Neutral"]
# Process each document without a tag
for e in mycollection.find({'tag':''}):
newsid = e['_id'] # Extract the MongoDB ObjectID
newstitle = e['title']
newsdescription = e['description']
# Display document count by tags
print("Document count")
print('')
total = 0
for c in mycollection.aggregate([
{'$match': {'tag': {'$exists':True}}}, 
{'$group': {'_id': '$tag', 'count': {'$sum': 1}}},
{'$sort':{'_id':1}}
]):
tag_temp = 'Empty' if c['_id'] == '' else c['_id']
total += c['count']
print(f"{tag_temp + ' has: ':20s} {c['count']}")
print(f"Total documents: {total}")
print('')
# Handle news items with removed titles
if newstitle == '[Removed]':
print("The title is empty. Do you want to delete it? Answer Y or N")
response = input()
if response.lower().strip() == 'y':
mycollection.delete_one({'_id': ObjectId(newsid)})
print(f"The news with _id: {newsid} has been deleted")
else:
print("Okay, then deal with it.")
print("")
# Tag news items with valid titles
else:
print(newstitle)
print(newsdescription)
print('Add the tag here: ', end="")
tag = input().strip().capitalize()
if tag not in emotions:
print(f"{tag} is invalid. Choose from the following options: {emotions}")
print('')
print("Add the new tag here: ", end="")
print('')
tag = input().strip().capitalize()
# Update the document with a valid tag
print('')
print(newsid)
print(f'HERE IS THE NEW TAG: {tag}')
print('')
response = mycollection.update_one({'_id': ObjectId(newsid)}, {'$set': {'tag': str(tag)}})
if tag == 'Neutral':
count = mycollection.count_documents({'tag': 'Neutral'})
print(f'There are {count} documents with the tag {tag}')
print(f'Do you want to keep it? Y/N ', end="")
res = input('').lower().strip()
if res == 'n':
mycollection.delete_one({'_id': ObjectId(newsid)})
print('')
print(f'The news you just tagged as {tag} has been deleted from the DB')
print('')
else:
print('This news has been added to your DB =)')
# Log the result of the update
if response.matched_count == 0:
print("No document found with the given ID.")
else:
print("Document updated successfully.")
print("")

• Split the table

  This query is used to structure and transform nested JSON data into a flat table format for easier querying and analysis in BigQuery.

CREATE OR REPLACE TABLE `moody-app-dd775.moodyappdataset29032024.splittable` AS
SELECT
id,
JSON_EXTRACT(source_data, ‘$.title’)AS_title,
JSON_EXTRACT(source_data, ‘$.description’)AS_description,
JSON_EXTRACT(source_data, ‘$.tag’)AS_tag,
JSON_EXTRACT(source_data, ‘$.publishedAt’)AS_publishedAt,
JSON_EXTRACT(source_data, ‘$.source’)AS_source

FROM `moody-app-dd775.moodyappdataset29032024.modyapptable29032024`; 

• Filtering Parameters
  This query filters out and retains only the columns _title, _description, _publishedAt, and _tag from the splittable table, effectively creating a more focused or simplified table where only these pieces of information are required.

• Split the training and test batches

  The purpose of this query is to prepare the data for machine learning or statistical modeling by creating a random split of the data into training and testing sets. This is a common practice in data science to evaluate the performance of a model on unseen data.
  It transforms the data from the filteringparameters table by adding a new column that assigns each row to either a training set or a test set based on a random selection.

  CASE WHEN RAND() < 0.8 THEN 'train' ELSE 'test' END as batch« : This line introduces a new column named batch. For each row, it generates a random number between 0 and 1 using RAND(). If the number is less than 0.8, the row is labeled as ‘train’; otherwise, it is labeled as ‘test’. This effectively splits the data into training and testing sets, with approximately 80% of the data allocated to training and the remaining 20% to testing.

• Multiclass model (logic regression) WiP