A simple library to validate strings in the V language
The main purpose of this library is to validate the user input in the web applications.
Due to the nature of the input in the web (it's almost always strings), the main focus is on validating
strings
Installation and Usage
The library provides a number of validators and sanitizers
Validators
Here's the full list of the currently available validators:
| Validator | Description |
|---|---|
| is_bool | Checks if the string is a bool |
| is_eq | Checks if the string is equal to another int, float or string value |
| is_ne | Checks if the string is not equal to another int, float or string value |
| is_in | Checks if the string is in an array of allowed values |
| is_gt | Checks if the string is greater than another int, float or string value |
| is_ge | Checks if the string is greater or equal to another int, float or string value |
| is_lt | Checks if the string is less than another int, float or string value |
| is_le | Checks if the string is less or equal to another int, float or string value |
| is_email | Checks if the string is a valid email address |
| is_fqdn | Checks if the string is a Fully Qualified Domain Name |
| is_float | Checks if the string is a float |
| is_int | Checks if the string is an integer |
| is_ip | Checks if the string is an IP address (v4 or v6) |
| is_ipv4 | Checks if the string is an IPv4 address |
| is_ipv6 | Checks if the string is an IPv6 address |
| is_regex_match | Checks if the string matches the regular expression |
| is_regex_valid | Checks if regular expression syntax is correct |
| is_uuid | Checks if the string is a valid UUID |
| is_uuid_v3 | Checks if the string is a valid UUID v3 |
| is_uuid_v4 | Checks if the string is a valid UUID v4 |
| is_uuid_v5 | Checks if the string is a valid UUID v5 |
Validation chain
All validators listed above can be used within a validation chain.
Here's the list of additional functions and methods:
| Sanitizer | Description |
|---|---|
| new_chain | Returns the new validation chain |
| .bail | Stops running validations if any of the previous ones have failed |
| .validate | Runs the validation chain against the provided value |
| .get_errors | Returns list of the validation errors |
Example usage of the chain:
mut ch := new_chain()
ch.is_gt(dst: 'a')
ch.is_le(dst: 'c')
ch.bail()
ch.is_int({}) # this won't be reached ever
assert ch.validate('z') == false
Sanitizers
Here's the full list of the currently available sanitizers:
| Sanitizer | Description |
|---|---|
| to_bool | Converts the string to a boolean value |
| to_float | Converts the string to a float value |
| to_int | Converts the string to an integer value |
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