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* Resource Limits Middleware
* Validates if tenant can create more resources based on their plan limits
*/
const { pool } = require('../config/database');
const { logger } = require('../config/logger');
/**
* Check if tenant has reached resource limit
* @param {string} resourceType - Type of resource (stores, users, departments, contacts, conversations, devices)
*/
const checkResourceLimit = (resourceType) => {
return async (req, res, next) => {
try {
const tenantId = req.tenantId || req.user?.tenantId || req.user?.tenant_id;
if (!tenantId) {
return res.status(400).json({
success: false,
message: 'Tenant ID not found'
});
}
// Get tenant limits
const [tenants] = await pool.execute(
'SELECT * FROM tenants WHERE id = ?',
[tenantId]
);
if (tenants.length === 0) {
return res.status(404).json({
success: false,
message: 'Tenant not found'
});
}
const tenant = tenants[0];
// Map resource types to limit columns and table names
const resourceConfig = {
stores: {
limitColumn: 'max_stores',
table: 'stores',
name: 'stores'
},
users: {
limitColumn: 'max_users',
table: 'users',
name: 'users'
},
departments: {
limitColumn: 'max_departments',
table: 'departments',
name: 'departments'
},
contacts: {
limitColumn: 'max_contacts',
table: 'contacts',
name: 'contacts'
},
conversations: {
limitColumn: 'max_conversations',
table: 'conversations',
name: 'conversations'
},
devices: {
limitColumn: 'max_devices',
table: 'devices',
name: 'devices'
}
};
const config = resourceConfig[resourceType];
if (!config) {
logger.error('Invalid resource type', { resourceType });
return res.status(400).json({
success: false,
message: 'Invalid resource type'
});
}
const limit = tenant[config.limitColumn];
// If limit is -1 or null, it's unlimited
if (limit === -1 || limit === null) {
return next();
}
// Check current usage
const [result] = await pool.execute(
`SELECT COUNT(*) as count FROM ${config.table} WHERE tenant_id = ?`,
[tenantId]
);
const currentCount = result[0].count;
if (currentCount >= limit) {
logger.warn('Resource limit reached', {
tenantId,
resourceType,
currentCount,
limit
});
return res.status(403).json({
success: false,
message: `You have reached the maximum number of ${config.name} (${limit}) allowed by your plan. Please upgrade your plan to add more.`,
error: 'RESOURCE_LIMIT_REACHED',
data: {
resource: resourceType,
current: currentCount,
limit: limit
}
});
}
// Add limit info to request for reference
req.resourceLimit = {
resource: resourceType,
current: currentCount,
limit: limit,
remaining: limit - currentCount
};
next();
} catch (error) {
logger.error('Error checking resource limit', {
error: error.message,
resourceType
});
return res.status(500).json({
success: false,
message: 'Error checking resource limits'
});
}
};
};
/**
* Check if feature is enabled for tenant's plan
* @param {string} featureName - Name of the feature (whatsapp_enabled, ai_enabled, etc.)
*/
const checkFeatureEnabled = (featureName) => {
return async (req, res, next) => {
try {
const tenantId = req.tenantId || req.user?.tenantId || req.user?.tenant_id;
if (!tenantId) {
return res.status(400).json({
success: false,
message: 'Tenant ID not found'
});
}
// Get tenant plan features
const [tenants] = await pool.execute(
`SELECT t.*, sp.${featureName}
FROM tenants t
LEFT JOIN subscription_plans sp ON t.plan_id = sp.id
WHERE t.id = ?`,
[tenantId]
);
if (tenants.length === 0) {
return res.status(404).json({
success: false,
message: 'Tenant not found'
});
}
const tenant = tenants[0];
const isEnabled = tenant[featureName];
if (!isEnabled) {
logger.warn('Feature not enabled for tenant', {
tenantId,
featureName
});
return res.status(403).json({
success: false,
message: `This feature is not available in your current plan. Please upgrade to access ${featureName.replace('_enabled', '').replace('_', ' ')}.`,
error: 'FEATURE_NOT_ENABLED',
data: {
feature: featureName
}
});
}
next();
} catch (error) {
logger.error('Error checking feature access', {
error: error.message,
featureName
});
return res.status(500).json({
success: false,
message: 'Error checking feature access'
});
}
};
};
module.exports = {
checkResourceLimit,
checkFeatureEnabled
};
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