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* Generates a random One-Time Password (OTP) of a specified length.
*
* This utility function generates a random OTP using digits from 0 to 9. The length of the OTP is determined by the
* provided `num` parameter. The OTP length must be at least 4 digits.
*
* @param {number} num - The length of the OTP to generate. Must be a positive integer greater than or equal to 4.
* @returns {string} A string representing the randomly generated OTP with the specified length.
*
* @example
* const otp = generateOTP(6);
* console.log(otp); // Example Output: "483920"
*
* @throws {Error} Will throw an error if `num` is less than 4 or not a positive integer.
*/
export function generateOTP(num: number): string {
if (num < 4 || !Number.isInteger(num)) {
throw new Error("The length of the OTP must be a positive integer greater than or equal to 4.");
}
const digits = "0123456789";
let OTP = "";
for (let i = 0; i < num; i++) {
OTP += digits[Math.floor(Math.random() * 10)];
}
return OTP;
}
/**
* A class to manage form data for database queries, maintaining a specific order of the values.
*
* This class stores the form data in a `data` object, where keys represent field names,
* and the values are the corresponding values of the fields. The `order` array is used to
* ensure that the values are returned in a specific order.
*/
export class PgFormData {
private data: Record<string, any>;
private order: string[];
/**
* Creates an instance of the PgFormData class.
*
* @param {object} data - The form data where keys are field names and values are the field values.
* @param {string[]} order - The order in which the values should be returned.
*/
constructor(data: object, order: string[]) {
this.data = data;
this.order = order;
}
/**
* Returns the form values in the specified order for database query purposes.
*
* If a field's value is an object, it will be converted to a JSON string.
* If a field's value is `undefined`, it will be replaced with `null`.
*
* @returns {Array<any>} - The form values in the specified order, with `null` for undefined values and
* JSON strings for objects.
*/
get values(): Array<any> {
return this.order.map((key) => {
const value = this.data[key];
if (value === undefined) {
return null;
} else if (value !== null && typeof value === 'object') {
return JSON.stringify(value); // Stringify objects
}
return value;
});
}
}
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