src/models/Deadline.js

const mongoose = require('mongoose');

const deadlineSchema = new mongoose.Schema({
    discordId: {
        type: String,
        required: true
    },
    courseName: {
        type: String,
        required: true
    },
    assignmentTitle: {
        type: String,
        required: true
    },
    deadlineTime: {
        type: Date,
        required: true
    },
    status: {
        type: String,
        default: 'Pending'
    },
    remindersSent: {
        newAssignment: { type: Boolean, default: false },
        oneDay: { type: Boolean, default: false },
        oneHour: { type: Boolean, default: false },
        tenMinutes: { type: Boolean, default: false }
    }
});

// A unique index to prevent saving duplicates of the same assignment for the same user
deadlineSchema.index({ discordId: 1, assignmentTitle: 1, courseName: 1 }, { unique: true });

module.exports = mongoose.model('Deadline', deadlineSchema);