Directory Structure:

└── ./
└── SmartMaint
├── config
│ └── db.js
├── controllers
│ ├── adminController.js
│ ├── authController.js
│ ├── foremanController.js
│ ├── operatorController.js
│ └── testController.js
├── models
│ ├── Alert.js
│ ├── Complaint.js
│ ├── GenAIInteraction.js
│ ├── Log.js
│ ├── Machine.js
│ ├── ModelConfiguration.js
│ ├── Report.js
│ ├── Schedule.js
│ ├── Task.js
│ ├── User.js
│ ├── userModel.js
│ └── Validation.js
├── routes
│ ├── adminRoutes.js
│ ├── authRoutes.js
│ ├── foremanRoutes.js
│ ├── operatorRoutes.js
│ └── testRoutes.js
├── .env
├── package-lock.json
├── package.json
└── server.js

---
File: /SmartMaint/config/db.js
---

const mongoose = require('mongoose');

//function mongoDb database connection

const connectDb = async () => {
try{
await mongoose.connect(process.env.MONGO_URL)
console.log(`Connected To Database ${mongoose.connection.host}`)
}catch(error){
console.log("DB Error", error)
}
};

module.exports = connectDb;

---
File: /SmartMaint/controllers/adminController.js
---

---
File: /SmartMaint/controllers/authController.js
---

---
File: /SmartMaint/controllers/foremanController.js
---

---
File: /SmartMaint/controllers/operatorController.js
---

---
File: /SmartMaint/controllers/testController.js
---

const testUserController = (req, res) => {

try{
res.status(200).send({
success: true,
message: "test User data API",
});
}catch(error){
console.log('error in test API', error)
}
};

module.exports = {testUserController};

---
File: /SmartMaint/models/Alert.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const alertSchema = new mongoose.Schema({

alertId: { type: String, default: uuidv4, unique: true },
taskId: { type: String, required: true }, // References Task
operatorId: { type: String, required: true }, // References User
foremanId: { type: String }, // References User
adminId: { type: String }, // References User
severity: { type: String, enum: ['soft', 'escalated'], required: true },
 message: { type: String, required: true },
createdAt: { type: Date, default: Date.now },
resolvedAt: { type: Date }
}, {
timestamps: true
});

alertSchema.index({ alertId: 1 });

alertSchema.index({ taskId: 1 });
alertSchema.index({ foremanId: 1 });
alertSchema.index({ adminId: 1 });
alertSchema.index({ severity: 1 });

module.exports = mongoose.model('Alert', alertSchema);

---
File: /SmartMaint/models/Complaint.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const complaintSchema = new mongoose.Schema({

complaintId: { type: String, default: uuidv4, unique: true },
machineId: { type: String, required: true }, // References Machine
operatorId: { type: String, required: true }, // References User
foremanId: { type: String }, // References User
issueType: { type: String, enum: ['noise', 'vibration', 'leak'], required:
true },
description: { type: String, required: true },
status: { type: String, enum: ['open', 'assigned', 'resolved'], required: true },
createdAt: { type: Date, default: Date.now },
updatedAt: { type: Date }
}, {
timestamps: true
});

complaintSchema.index({ complaintId: 1 });

complaintSchema.index({ machineId: 1 });
complaintSchema.index({ foremanId: 1 });
complaintSchema.index({ status: 1 });

module.exports = mongoose.model('Complaint', complaintSchema);

---
File: /SmartMaint/models/GenAIInteraction.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const genAIInteractionSchema = new mongoose.Schema({

interactionId: { type: String, default: uuidv4, unique: true },
adminId: { type: String, required: true }, // References User
query: { type: String, required: true },
response: { type: String, required: true },
timestamp: { type: Date, default: Date.now }
}, {
timestamps: true
});

genAIInteractionSchema.index({ interactionId: 1 });

genAIInteractionSchema.index({ adminId: 1 });
genAIInteractionSchema.index({ timestamp: 1 });

module.exports = mongoose.model('GenAIInteraction', genAIInteractionSchema);

---
File: /SmartMaint/models/Log.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const logSchema = new mongoose.Schema({

logId: { type: String, default: uuidv4, unique: true },
taskId: { type: String, required: true }, // References Task
operatorId: { type: String, required: true }, // References User
machineId: { type: String, required: true }, // References Machine
action: { type: String, enum: ['scan', 'complete'], required: true },
timestamp: { type: Date, default: Date.now },
details: { type: Object } // e.g., { notes: "Cleaned filter" }
}, {
timestamps: true
});

logSchema.index({ logId: 1 });

logSchema.index({ taskId: 1 });
logSchema.index({ timestamp: 1 });

module.exports = mongoose.model('Log', logSchema);

---
File: /SmartMaint/models/Machine.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const machineSchema = new mongoose.Schema({

machineId: { type: String, default: uuidv4, unique: true },
name: { type: String, required: true },
type: { type: String, required: true }, // e.g., lathe, mill
materialType: { type: String }, // e.g., steel, aluminum
usageFrequency: { type: Number }, // Hours per day
lastFailure: { type: Date },
qrCode: { type: String, unique: true },
validationQrCode: { type: String, unique: true },
createdAt: { type: Date, default: Date.now },
updatedAt: { type: Date }
}, {
timestamps: true
});
machineSchema.index({ machineId: 1 });
machineSchema.index({ name: 1 });

module.exports = mongoose.model('Machine', machineSchema);

---
File: /SmartMaint/models/ModelConfiguration.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const modelConfigurationSchema = new mongoose.Schema({

configId: { type: String, default: uuidv4, unique: true },
adminId: { type: String, required: true }, // References User
alertThresholds: {
soft: { type: Number, default: 0.1 },
escalated: { type: Number, default: 0.15 }
},
taskIntervals: {
cleaning: { type: Number, default: 7 },
calibration: { type: Number, default: 14 },
alignment: { type: Number, default: 30 }
},
accuracy: { type: Number },
lastTrained: { type: Date },
createdAt: { type: Date, default: Date.now },
updatedAt: { type: Date }
}, {
timestamps: true
});

modelConfigurationSchema.index({ configId: 1 });

modelConfigurationSchema.index({ adminId: 1 });

module.exports = mongoose.model('ModelConfiguration', modelConfigurationSchema);

---
File: /SmartMaint/models/Report.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const reportSchema = new mongoose.Schema({

reportId: { type: String, default: uuidv4, unique: true },
adminId: { type: String, required: true }, // References User
type: { type: String, enum: ['summary', 'detailed', 'audit'], required: true },
timeframe: {
start: { type: Date, required: true },
end: { type: Date, required: true }
},
data: { type: Object }, // e.g., { mtbf: 120, mttr: 2 }
pdfUrl: { type: String },
createdAt: { type: Date, default: Date.now }
}, {
timestamps: true
});

reportSchema.index({ reportId: 1 });

reportSchema.index({ adminId: 1 });
reportSchema.index({ createdAt: 1 });

module.exports = mongoose.model('Report', reportSchema);

---
File: /SmartMaint/models/Schedule.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const scheduleSchema = new mongoose.Schema({

scheduleId: { type: String, default: uuidv4, unique: true },
foremanId: { type: String, required: true }, // References User
tasks: [{
taskId: { type: String }, // References Task
dueTime: { type: Date },
operatorId: { type: String } // References User
}],
timeframe: {
start: { type: Date, required: true },
end: { type: Date, required: true }
},
priority: { type: String, enum: ['normal', 'high', 'complaint-based'], required:
true },
status: { type: String, enum: ['draft', 'approved'], required: true },
createdAt: { type: Date, default: Date.now },
updatedAt: { type: Date }
}, {
timestamps: true
});

scheduleSchema.index({ scheduleId: 1 });

scheduleSchema.index({ foremanId: 1 });
scheduleSchema.index({ status: 1 });

module.exports = mongoose.model('Schedule', scheduleSchema);

---
File: /SmartMaint/models/Task.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const taskSchema = new mongoose.Schema({

taskId: { type: String, default: uuidv4, unique: true },
machineId: { type: String, required: true }, // References Machine
operatorId: { type: String, required: true }, // References User
foremanId: { type: String }, // References User (for validation)
type: { type: String, enum: ['cleaning', 'calibration', 'alignment'], required:
true },
status: { type: String, enum: ['pending', 'completed', 'overdue'], required: true
},
dueTime: { type: Date, required: true },
completedAt: { type: Date },
qrCode: { type: String, unique: true },
createdAt: { type: Date, default: Date.now },
updatedAt: { type: Date }
}, {
timestamps: true
});

taskSchema.index({ taskId: 1 });

taskSchema.index({ machineId: 1 });
taskSchema.index({ operatorId: 1 });
taskSchema.index({ foremanId: 1 });
taskSchema.index({ status: 1 });

module.exports = mongoose.model('Task', taskSchema);

---
File: /SmartMaint/models/User.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const userSchema = new mongoose.Schema({

userId: { type: String, default: uuidv4, unique: true },
username: { type: String, required: true, unique: true },
passwordHash: { type: String, required: true },
role: { type: String, enum: ['operator', 'foreman', 'admin'], required: true },
name: { type: String, required: true },
shiftId: { type: String }, // References Shift (not defined here)
teamIds: [{ type: String }], // For foremen, references operator userIds
permissions: [{ type: String }], // For admins, e.g., ['configure_model']
createdAt: { type: Date, default: Date.now },
lastLogin: { type: Date }
}, {
timestamps: true
});

userSchema.index({ username: 1 }, { unique: true });

userSchema.index({ userId: 1 });

module.exports = mongoose.model('User', userSchema);

---
File: /SmartMaint/models/userModel.js
---

const mongoose = require("mongoose");

//schema
const userSchema = new mongoose.Schema(
{
userName: {
type: String,
required: [true, "user name is required"],
 },
email: {
type: String,
required: [true, "email is required"],
unique: true,
},
password: {
type: String,
required: [true, "password is required"],
},
address: {
type: Array,
},
phone: {
type: String,
required: [true, "phone number is require"],
},
usertype: {
type: String,
required: [true, "user type is required"],
default: "clinet",
enum: ["clinet", "admin", "vendor", "driver"],
},
profile: {
type: String,
default:
"https://cdn.pixabay.com/photo/2020/07/01/12/58/icon-5359553_640.png",
},
answer: {
type: String,
required: [true, "Asnwer is required"],
},
},
{ timestamps: true }
);

//export
module.exports = mongoose.model("User", userSchema);

---
File: /SmartMaint/models/Validation.js
---

const mongoose = require('mongoose');

const { v4: uuidv4 } = require('uuid');

const validationSchema = new mongoose.Schema({

validationId: { type: String, default: uuidv4, unique: true },
taskId: { type: String, required: true }, // References Task
foremanId: { type: String, required: true }, // References User
status: { type: String, enum: ['approved', 'rejected'], required: true },
feedback: { type: String },
timestamp: { type: Date, default: Date.now },
qrCode: { type: String, unique: true }
}, {
timestamps: true
});
validationSchema.index({ validationId: 1 });
validationSchema.index({ taskId: 1 });
validationSchema.index({ foremanId: 1 });

module.exports = mongoose.model('Validation', validationSchema);

---
File: /SmartMaint/routes/adminRoutes.js
---

---
File: /SmartMaint/routes/authRoutes.js
---

---
File: /SmartMaint/routes/foremanRoutes.js
---

---
File: /SmartMaint/routes/operatorRoutes.js
---

---
File: /SmartMaint/routes/testRoutes.js
---

const express = require('express');

const {testUserController} = require('../controllers/testController');

//router object
const router = express.Router();

//routes
router.get('/test-user', testUserController);

//export
module.exports = router;

---
File: /SmartMaint/.env
---

PORT = 8080
MONGO_URL =
mongodb+srv://abcdtheprivate:C6z6gvxSzMq9fyXM@cluster0.rph3n7y.mongodb.net/smart-
maint

---
File: /SmartMaint/package-lock.json
---

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}

---
File: /SmartMaint/package.json
---

{
"name": "smartmaint",
"version": "1.0.0",
"main": "server.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "nodemon server.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"description": "Backend for SmartMaint.AI",
"dependencies": {
"colors": "^1.4.0",
"cors": "^2.8.5",
"dotenv": "^16.5.0",
"express": "^5.1.0",
"mongoose": "^8.15.0",
"morgan": "^1.10.0",
"uuid": "^11.1.0"
}
}

---
File: /SmartMaint/server.js
---
const express = require('express');
const cors = require('cors');
const dotenv = require('dotenv');
const connectDb = require("./config/db");
const authRoutes = require('./routes/authRoutes');
const operatorRoutes = require('./routes/operatorRoutes');
const foremanRoutes = require('./routes/foremanRoutes');
const adminRoutes = require('./routes/adminRoutes');

//dot env configuration

dotenv.config();

//db connection
connectDb();

//rest object
const app = express();

//middleware
app.use(cors());
app.use(express.json());

//route
app.use("/api/v1/test", require("./routes/testRoutes"));

app.get('/', (req, res) => {

return res.status(200).send("<h1>Welcome to SmartMaint </h1>")
});

app.use('/api/auth', authRoutes);
app.use('/api/operator', operatorRoutes);
app.use('/api/foreman', foremanRoutes);
app.use('/api/admin', adminRoutes);

//Port
const PORT = process.env.PORT || 8080;

//listen
app.listen(PORT, () => {
console.log(`Server running on ${PORT}`);
});