You are working on a project that requires you to set up various environment variables in a Node.js application. In the given code snippet, you can see several environment variables being assigned default values using the `process.env.XXXX` syntax.

Your task is to create a function `getEnvVariables` that takes in an object with default values for environment variables, and returns an object with actual values for those variables. The function should fetch the values of environment variables from the `process.env` object, and if a value is not found, it should use the default value from the input object.

You need to implement the following function:

```typescript
function getEnvVariables(defaults: Record<string, unknown>): Record<string, unknown> {
  // your code here
}
```

**Input**
- `defaults`: An object containing default values for the environment variables. The keys are the names of the environment variables, and the values are their default values. (1 <= number of keys <= 10)

**Output**
- Return an object with keys and values corresponding to actual values of environment variables. If a value is not found in `process.env`, use the default value provided in `defaults`.

**Example**

```typescript
const defaults = {
  MONGO_URL: 'mongodb://localhost:27017/db',
  API_URL: 'https://api.example.com',
  SMTP_HOST: 'smtp.example.com',
  SMTP_PORT: 587,
  CORS_ORIGIN: 'https://example.com'
};

process.env.MONGO_URL = 'mongodb+srv://username:password@example.com';
process.env.SMTP_PORT = '25';

const envVariables = getEnvVariables(defaults);
console.log(envVariables);

// Output:
// {
//   MONGO_URL: 'mongodb+srv://username:password@example.com',
//   API_URL: 'https://api.example.com',
//   SMTP_HOST: 'smtp.example.com',
//   SMTP_PORT: 25,
//   CORS_ORIGIN: 'https://example.com'
// }
```
user
Sure, I can help you with that. Here's how you can implement the `getEnvVariables` function using TypeScript.

```typescript
function getEnvVariables(defaults: Record<string, unknown>): Record<string, unknown> {
  const envVariables: Record<string, unknown> = {};

  Object.keys(defaults).forEach(key => {
    const value = process.env[key] || defaults[key];
    envVariables[key] = value;
  });

  return envVariables;
}
```

This function first creates an empty object to hold the final environment variables. Then, it loops through the keys in the `defaults` object. For each key, it checks if the corresponding environment variable exists in `process.env`, and if not, it sets it to the default value. The `||` operator in the `value` variable assignment returns the left operand if it exists, or the right operand if it doesn't. This is a safe way to handle missing environment variables.

I hope this helps! Let me know if you have any further questions.
assistant
You are working on a project that requires you to set up various environment variables in a Node.js application. In the given code snippet, you can see several environment variables being assigned default values using the `process.env.XXXX` syntax.

Your task is to create a function `getEnvVariables` that takes in an object with default values for environment variables, and returns an object with actual values for those variables. The function should fetch the values of environment variables from the `process.env` object, and if a value is not found, it should use the default value from the input object.

You need to implement the following function:

```typescript
function getEnvVariables(defaults: Record<string, unknown>): Record<string, unknown> {
  // your code here
}
```

**Input**
- `defaults`: An object containing default values for the environment variables. The keys are the names of the environment variables, and the values are their default values. (1 <= number of keys <= 10)

**Output**
- Return an object with keys and values corresponding to actual values of environment variables. If a value is not found in `process.env`, use the default value provided in `defaults`.

**Example**

```typescript
const defaults = {
  MONGO_URL: 'mongodb://localhost:27017/db',
  API_URL: 'https://api.example.com',
  SMTP_HOST: 'smtp.example.com',
  SMTP_PORT: 587,
  CORS_ORIGIN: 'https://example.com'
};

process.env.MONGO_URL = 'mongodb+srv://username:password@example.com';
process.env.SMTP_PORT = '25';

const envVariables = getEnvVariables(defaults);
console.log(envVariables);

// Output:
// {
//   MONGO_URL: 'mongodb+srv://username:password@example.com',
//   API_URL: 'https://api.example.com',
//   SMTP_HOST: 'smtp.example.com',
//   SMTP_PORT: 25,
//   CORS_ORIGIN: 'https://example.com'
// }
```
user
Sure, here is the implementation of the `getEnvVariables` function:

```typescript
function getEnvVariables(defaults: Record<string, unknown>): Record<string, unknown> {
  const envVariables: Record<string, unknown> = {};

  for (const [key, defaultValue] of Object.entries(defaults)) {
    const envValue = process.env[key];

    // If the environment variable is not found or its value is empty, use the default value
    envVariables[key] = envValue !== undefined && envValue !== '' ? envValue : defaultValue;
  }

  return envVariables;
}
```

This function iterates over the keys and values in the `defaults` object. For each key, it checks if the corresponding environment variable exists in `process.env` and if its value is not empty. If the environment variable is found and has a value, that value is used. Otherwise, the default value is used. The results are stored in the `envVariables` object, which is returned at the end.
assistant