Commit graph

666 commits

Author SHA1 Message Date
Alexandre Gomes Gaigalas
c523b856e7 Introduce Trimmed validator
This commit introduces the `Trimmed` validator that ensures a string
cannot start or end with a list of specific values.

The default values used are a selected list of Unicode invisible
characters.

To support this change, the StartsWith and EndsWith validators were
modified so they can also support multiple values to check for.

While StartsWith and EndsWith are more generic, and also perform
start-of-array and end-of-array kinds of checks, Trimmed is more
focused on string inputs, which tailors to a more specific use
case.
2026-03-04 16:23:25 +00:00
Alexandre Gomes Gaigalas
d4d04b87cd Fix PublicSuffix validator and UpdateDomainSuffixesCommand
- Parce PSL ICANN section into structured sections (rules,
   wildcards, exceptions) according to the format.
 - Updates PublicSuffix semantics for complete application of
   the rules.
 - Includes private domain suffixes now.
 - Refreshes the existing data.
 - Fixes the update-regionals.yml workflow, set it to run
   twice a week.

References: https://github.com/publicsuffix/list/wiki/Format#format
2026-03-04 16:23:25 +00:00
Henrique Moody
d4605f4493
Add wildcard support to ResultQuery::findByPath()
Before this change, querying validation results required knowing the
exact path to a specific result node—including numeric indices for
array elements (e.g., `items.1.email`). This made it impractical to
locate the first failing result in dynamic collections where the
failing index is not known ahead of time.

Wildcard segments (`*`) allow matching any single path component, so
patterns like `items.*`, `*.email`, or `data.*.value` will traverse
the result tree and return the first node whose path matches. This is
particularly valuable when validating arrays of items with `each()`,
because consumers can now ask "give me the first failure under items"
without iterating manually.

The implementation replaces the previous flat `array_find` lookup with
a recursive depth-first traversal that, when a wildcard is present,
compares each node's full path against the pattern using segment-level
matching. Non-wildcard lookups continue to use exact array equality,
so there is no behavioral change for existing callers.

Assisted-by: Claude Code (claude-opus-4-6)
2026-02-08 22:43:06 +01:00
Henrique Moody
6abf3a548c
Remove Masked validator in favor of Formatted
The Masked validator was a proxy for what the new Formatted validator
already does, so it is being removed to reduce redundancy. All tests and
documentation have been updated accordingly.

Assisted-by: OpenCode (ollama-cloud/glm-4.7)
2026-02-06 20:44:26 +01:00
Henrique Moody
dc0c0345c9
Create "Formatted" validator
The Formatted validator decorates another validator to transform how
input values appear in error messages, while still validating the
original unmodified input.

This is useful for improving the readability of error messages by
displaying values in a user-friendly formatd.

The validator accepts any Respect\StringFormatter\Formatter implementation,
allowing direct use of StringFormatter's fluent builder. As StringFormatter
expands with more formatters in future releases, users will automatically
benefit from the full range of formatting options.

Assisted-by: Claude Code (Opus 4.5)
2026-02-06 20:44:26 +01:00
Henrique Moody
e84d15f4e4
Rename Composite to LogicalComposite
Rename the Composite class to LogicalComposite to more accurately reflect
its purpose as a validator that combines child validators using logical
operations (AND, OR, NAND, XOR).

This better naming also opens the door for additional composite patterns
beyond logical operations, enabling future validator compositions.

Assisted-by: OpenCode (GLM 4.5)
2026-02-06 18:15:36 +01:00
Alexandre Gomes Gaigalas
91ceaafd2d Update translation docs
The documents on translation were updated to feature symfony with
an array provider. Duplicated container notes were extracted to
a single configuration.md file.

An API for accessing the messages, so users don't have to copy
and paste them from the source or docs, was provided and
TemplateResolver was refactored to use it.
2026-02-06 17:11:34 +00:00
Henrique Moody
b701fac656
Create ShortCircuit validator and ShortCircuitable interface
This commit introduces a mechanism for validators to return early once
the validation outcome is determined, rather than evaluating all child
validators.

The ShortCircuit validator evaluates validators sequentially and stops
at the first failure, similar to how PHP's && operator works. This is
useful when later validators depend on earlier ones passing, or when
you want only the first error message.

The ShortCircuitCapable interface allows composite validators (AllOf,
AnyOf, OneOf, NoneOf, Each, All) to implement their own short-circuit
logic.

Why "ShortCircuit" instead of "FailFast":

The name "FailFast" was initially considered but proved misleading.
While AllOf stops on failure (fail fast), AnyOf stops on success
(succeed fast), and OneOf stops on the second success. The common
behavior is not about failing quickly, but about returning as soon as
the outcome is determined—which is exactly what short-circuit
evaluation means. This terminology is familiar to developers from
boolean operators (&& and ||), making the behavior immediately
understandable.

Co-authored-by: Alexandre Gomes Gaigalas <alganet@gmail.com>
Assisted-by: Claude Code (Opus 4.5)
2026-02-05 17:32:42 +01:00
Alexandre Gomes Gaigalas
e636b63f14 Add v::format() to check if data is already in a specific format
This validator is not so much about how we present the input
during error messages, but in what format data already is formatted.
2026-02-05 16:19:11 +00:00
Valdeir S
570ba481b1 Add Support for Alphanumeric CNPJ
Due to the continuous increase in the number of companies and the
imminent exhaustion of available CNPJs (Brazilian taxpayer
identification numbers), the Brazilian Federal Revenue Service is
instituting the alphanumeric CNPJ. The initiative aims to
facilitate the identification of all companies and improve the
business environment, contributing to the economic and social
development of Brazil.

The alphanumeric CNPJ will be assigned, starting in July 2026,
exclusively to new registrations.

Changes:

- Add support for alphanumeric CNPJ validation
- Format code according to PHPCS standards
- Simplify CNPJ conversion to uppercase character array
- Add documentation about CNPJ structure
2026-02-04 13:20:30 +01:00
Henrique Moody
7c681fec66
Fix SPDX headers in all files
I ran the `bin/console spdx --fix` with different strategies for
different files. For most of the core classes, since they've been
drastically rebuilt, I've run it with the `git-blame` strategy, for for
the `src/Validators`, in which the API changed completely but the logic
remains the same, I use the `git-log` strategy.
2026-02-03 15:23:23 +01:00
Henrique Moody
7db3bea8a6
Enhance LintSpdxCommand with contributor tracking and header normalization
Improves SPDX header linting to ensure consistent license metadata across
the codebase.

Key changes:

- Enforce deterministic tag ordering (License-Identifier, FileCopyrightText,
  FileContributor) to ensure consistency, prevent merge conflicts, and
  simplify code reviews

- Add contributor alias mapping to consolidate contributors with multiple
  emails or name variations (e.g., "nickl-" → "Nick Lombard")

- Add --contributions-strategy option with "blame" (current code authors)
  and "log" (all historical contributors) to support different attribution
  philosophies

- Add optional path argument to lint specific files or directories

- Add --fix option to automatically correct header issues

Assisted-by: Claude Code (claude-opus-4-5-20251101)
2026-02-03 15:23:20 +01:00
Alexandre Gomes Gaigalas
1b584d88a3 Handle more collision scenarios on NestedArrayFormatter
See #1668 for more info.

There is a new test "Deep name collision" on AllOfTest that
exemplifies the kind of collision this change solves.

Some extra `__root__` keys needed to be added to a select few
other scenarios for consistency.
2026-02-02 20:21:14 +00:00
Henrique Moody
63f7753e43
Rename "Call" validator to "After"
The previous name was confusing as it focused on the implementation
detail (calling a callable) rather than what the validator actually
does. The new name "After" better conveys the validator's purpose:
validating the input after applying a transformation.

Assisted-by: Claude Code (Opus 4.5)
2026-02-02 01:46:12 +01:00
Henrique Moody
92d53f096d
Rename "Callback" validator to "Satisfies"
The previous name was confusing as it focused on the implementation
detail (receiving a callback) rather than what the validator actually
does. The new name "Satisfies" better conveys the validator's purpose:
checking whether the input satisfies a given condition.

Assisted-by: Claude Code (Opus 4.5)
2026-02-02 01:40:14 +01:00
Henrique Moody
f822ed0298
Rename "Lazy" validator to "Factory"
The name "Factory" better conveys the validator's purpose: dynamically
creating a validator at runtime based on the input value. "Lazy" was
misleading as it suggested simple deferred evaluation rather than
input-dependent validator construction.

Also renamed the constructor argument from `$validatorCreator` to
`$factory` for improved expressiveness.

Assisted-by: Claude Code (Opus 4.5)
2026-02-02 01:40:14 +01:00
Alexandre Gomes Gaigalas
a64e33168f Improve Url validator to be more strict
Previously, the URL validator accepted all kinds of URLs.

Combining it with other validators like `Domain` and `Ip` manually
is clumbersome, since the rules are extensive and require small
tweaks such as understanding bracketed IP addresses.

This change makes that composition built-in. The validator still
uses the FILTER_VALIDATE_URL from PHP, but now it also goes deeper
and validate portions of the URL that other validators support.

Changes to `Call` were made so that it can be serialized under
certain circumstances (when invoking a static method call), making
it more flexible.

A static internal method helper for trimming the IP was added to
the Url validator class and marked as internal, as it cannot be
both private, serializable and accessible to the `Call` instance
all at the same time. The `@internal` annotation should advise
users that it's not a public API according to phpdoc conventions.
2026-02-02 00:26:40 +00:00
Alexandre Gomes Gaigalas
699f06075c Increase Coverage
- Changed Property so it doesn't have an unreachable line anymore.
 - Rename ValidatorTest to ValidatorBuilderTest to better reflect
   the source.
 - Added missing tests for KeyExists's ArrayAccess support.
 - Added tests for using custom exceptions.
2026-01-31 17:18:53 +00:00
Alexandre Gomes Gaigalas
9def16a19e Containerize Uuid optional dependencies for testability
This change makes the ramsey/uuid optional dependency testable
by using the ContainerRegistry to acquire an instance to its factory
instead of relying on `class_exists` directly.
2026-01-31 17:18:37 +00:00
Henrique Moody
b352f17718
Remove "Wrapper" abstract class
With PHP's promoted properties, there is little reason to have an
abstract class that only provides a constructor and a proxy method.
The greater part of the classes that extended Wrapper had their own
implementation of evaluate(), hence it made very little sense to keep
Wrapper in the codebase.

Assisted-by: Claude Code (Opus 4.5)
2026-01-31 00:36:19 +01:00
Alexandre Gomes Gaigalas
bcc60ec035 Allow empty values in iterables for All, Each, Max, Min
Now empty values are again allowed in FilteredArray-style
validators.

To solve the issue with negation, a Result attribute was
added to signal indeciseveness (when a result cannot be
reliably inverted). On such cases, we consider that result
to be valid.

For example, `v::not(v::min(v::equals(10)))` says "The
lowest value of the iterable input should not be equal 10".

If the input is empty, we cannot decide whether its minimum
is equal to 10 or not, so the validator essentially becomes
a null-op.

Users that want to ensure these validators have a valid
decidable target must use it in combination with `Length`
or other similar validators to achieve the same result.
2026-01-30 21:27:16 +00:00
Henrique Moody
882f24b6b8
Create "Masked" validator
The Masked validator decorates other validators to mask sensitive input
values in error messages while still validating the original unmasked
data.

This validator is essential for applications handling sensitive
information such as passwords, credit cards, or email addresses. Without
it, users would need to implement a custom layer between Validation and
the end user to prevent PII from appearing in error messages or logs.

With Masked, sensitive data protection is built directly into the
validation workflow with no additional abstraction required.

Assisted-by: Claude Code (Opus 4.5)
2026-01-30 21:06:36 +01:00
Henrique Moody
aafa204307
Fix input overwrite not propagating to adjacent results
Adjacent results are results that treat the same input. When overwriting
the input of a result, we should also overwrite the input of its adjacent
result to maintain consistency. Currently, there are no cases where this
has caused issues, but this change prevents potential problems.

Assisted-by: Claude Code (Opus 4.5)
2026-01-30 20:40:12 +01:00
Alexandre Gomes Gaigalas
ec16b3d2df Refactor case sensitiveness support
This is a mid-size refactor that affects several validators.

Most prominently, the ones that had an `$identical` parameter
to deal with case sensitiveness.

This parameter was confusing, effectively making validators such
as `Contains` behave very differently for arrays versus strings.

In arrays, `$identical` meant "the same type", while it in strings
it meant "case sensitive".

That parameter was removed, and the default behavior is now to
always compare **case sensitive** and strict typing.

A document explaining how to combine other validators in order
to achieve case _insensitive_ comparisons was added.

Additionally, the `Call` validator was refactored back to be
suitable to take on the task of being a fast, quick composable
validator.

With the introduction of `Circuit`, we can shift the responsibility
of dealing with possible mismatches to the user. This kind of type
handling is demonstrated in how I refactored `Tld` to account for
the type mismatch without setting error handlers.
2026-01-30 17:11:13 +00:00
Alexandre Gomes Gaigalas
47f8f82d7f Remove mathematical, niche and deprecated validators
This commit removes validators described in #1642, refactoring
to clean up after their removal.

 - Url was refactored to use the function `filter_var` instead.
 - tests/bootstrap.php is no longer needed and was removed.
 - Updated migration guide with recommendations for replacements.
2026-01-30 16:08:27 +00:00
Alexandre Gomes Gaigalas
b603ef7b24 Containerize PhoneNumberUtil instance for Phone rule
Similar to d8e31db (commit that containerized iso code dbs), but
this time for PhoneNumberUtil.

This makes the optional dependency testable.

PhoneNumberUtil doesn't have a public constructor, so a factory
was declared instead.
2026-01-29 21:42:32 +00:00
Alexandre Gomes Gaigalas
d8e31dbc3a Containerize sokil databases
The main focus of this change is to make those optional dependencies
more testable.

Unfortunately, some phpstan-ignores had to be included, since ::set
is not a PsrContainer method. We're only using it on tests though,
so it's fine. It targets our php-di container for testing purposes
only. The real implementation only relies on ::get.

This change also has the side effect of improving the performance
of those validators by not instantiating their databases each time
a iso validator is built, achieving massive improvements in those
scenarios. A small benchmark with no assertions was added to track
that improvement.
2026-01-29 19:29:51 +00:00
Henrique Moody
00e7f2a6ff
Fix ResultQuery::findByPath() for nested paths
The `findByPath()` method was failing to return results when using nested
dot-notation paths such as `user.email` or `items.1`. However, it’s returning
`null` instead of the expected result in some cases.

The root cause was a mismatch between how paths are stored vs searched:

- Storage: Validators like Key and Each create results where the path is stored
  as a linked list. For `user.email`, the "email" result has `path="email"` with
  `parent="user"`.

- Search (old): The method expected a tree structure where it would find a child
  with `path="user"`, then search that child for `path="email"`. But no child
  had `path="user"` - only "email" (with "user" as its parent).

The fix computes each result's full path by walking up the parent chain and
compares it against the search path. Also converts numeric strings to integers
when parsing paths (e.g., `items.1` → `['items', 1]`) since array indices are
stored as integers.

While working on this fix, I also realised that to expose the result's status,
it’s best to use `hasFailed()` instead of `isValid()` in `ResultQuery`, since
users will mostly use results when validation failed, not when it passed.

Assisted-by: Claude Code (Opus 4.5)
2026-01-27 13:25:40 +01:00
Henrique Moody
4390e4feb6
Simplify how we load and save files in data/
We had different ways of saving and loading files from `data/`, so I decided to
unify them to simplify things. I repurposed the `DomainInfo` class and named it
`DataLoader`, so we can use the same class to load anything from the `data/`
directory.
2026-01-26 20:28:29 +01:00
Henrique Moody
a107b8cb9f
Prevent validators from generating validatorBuilder Ids
When calling `v::validatorName()`, a `ValidatorBuilder` is instantiated
to manage the validation chain. However, users generally expect the ID
to reflect the specific validator invoked rather than the internal
builder class.

This commit updates `Id::fromValidator()` to resolve the ID from the
underlying validator when it is the sole member of the
`ValidatorBuilder`, ensuring more intuitive identification.
2026-01-26 13:57:39 +01:00
Henrique Moody
16b9240044
Allow passing definitions to the ContainerRegistry
This makes it slightly easier to define custom definitions to the
container before creating it.
2026-01-26 10:13:48 +01:00
Henrique Moody
a372a0b90b
Replace template rendering code with Respect\StringFormatter
I've moved almost all the code for placeholder replacement and parameter
modifiers into an external library called Respect\StringFormatter. This approach
allows us to evolve the template capabilities without making major changes to the
Validation's code.

This commit will introduce another dependency, `respect/string-formatter`, and
will upgrade the version of `respect/string-formatter`, which simplifies our
internal API greatly.

While making this change, I also updated how we generate exceptions. Instead of
rendering the full message and the array of messages, we delegate that creation
to the `ResultQuery`, which improves performance because we don’t need to render
those big messages unless the user actually needs them.
2026-01-21 17:29:15 +01:00
Alexandre Gomes Gaigalas
d9cdc118b2 Introduce REUSE compliance
This commit introduces REUSE compliance by annotating all files
with SPDX information and placing the reused licences in the
LICENSES folder.

We additionally removed the docheader tool which is made obsolete
by this change.

The main LICENSE and copyright text of the project is now not under
my personal name anymore, and it belongs to "The Respect Project
Contributors" instead.

This change restores author names to several files, giving the
appropriate attribution for contributions.
2026-01-21 06:28:11 +00:00
Alexandre Gomes Gaigalas
3270c1f72c Make all remaining validators serializable
This commit concludes the effort to make all current validators
serializable by fixing the remaining ones.

The ability to use `finfo` instances on some filesystem validators
was removed. `Image` was refactored to be a readonly class.

A command was added to the main `composer qa` flow that checks
if all validators are covered by smoke tests (which are currently
used by benchmarks and serialization tests). Therefore, this commit
also ensures that every validator has a benchmark.
2026-01-19 11:04:35 +00:00
Henrique Moody
f820f89b56
Rename InvalidRuleConstructorException to InvalidValidatorException
After renaming rules to validatores, it doesn't make sense to keep on
having that exception. I renamed it to a more cleaner name, not
mentioning the constructor because I think that if the constructor is
not valid, the validator is not valid, hence the name I chose.
2026-01-18 16:56:34 +01:00
Alexandre Gomes Gaigalas
8e5938a059 Introduce ContainsCount validator
This validator is similar to Contains, but also checks how many
times the needle appears.

Additionally, the Domain validator was changed to use it instead
of relying on an unserializable callback, thus, making it
serializable.
2026-01-15 13:39:46 +00:00
Alexandre Gomes Gaigalas
4618996b52 Fix factory when validator has no constructor
This change introduces a less misleading exception when trying to
construct an instance and failing due to mismatched arguments
coming from ReflectionExceptions.
2026-01-15 05:51:00 +00:00
Alexandre Gomes Gaigalas
cd96d01364 Fix message overriding bug in NestedArrayFormatter
This commit resolves an issue where validation messages would overwrite
each other when multiple validators failed on the same path or key
(e.g., within an `Each` or `Key` validator).

Changes to `NestedArrayFormatter`:
- Implemented a merge strategy: Key collisions now result in a list of
  messages instead of the last message winning.
- Improved handling of mixed key types: When both numeric and string
  keys are present (common in composite validators), numeric keys are now
  replaced by the validator's ID (e.g., `arrayType`, `equals`) to provide
  meaningful, distinct keys.
- Preserved list behavior: Purely numeric key sets are treated as lists,
  maintaining their sequence without re-keying logic.
- Refactored the class to use smaller, single-purpose methods and
  `array_reduce` for clarity.

Tests:
- Updated feature tests (`EachTest`, `AttributesTest`, etc.) to expect the
  full set of validation errors.
- Enhanced `NestedArrayFormatterTest` with scenarios for key collisions,
  mixed keys, and ID substitution.
2026-01-12 10:42:11 +00:00
Henrique Moody
6022914cf0
Remove Yes and No rules
I created those validators to make it easy to parse parameters or
console command inputs that were answers to questions one might ask.

One of the biggest problems is that it depends on the machine's locale,
which can be a bit troublesome, rather than receiving a locale in the
constructor. That doesn’t allow for a lot of flexibility when someone
has a multi-lingual application. Additionally, these validators rely on
the regex from `nl_langinfo()`, which is very permissive, resulting in
false positives.

I have a working version of a console command that retrieves data from
the Unicode Common Locale Data Repository (CLDR) and updates a list of
`yesstr` and `nostr` strings from the main XML file of each language.
However, I came to realise that the whole thing is not worth it.

The validators Yes and No can be replaced by using rules like `Regex`
and `In`. They won’t have the ease of multilingual support, but I don’t
think those validators are used a lot. So, I decided I would just remove
them, and if users really ask for it in the next major version, I’d be
happy to revive my branch.
2026-01-10 05:47:28 +01:00
Henrique Moody
f635cc748f
Update regional information
I manually run the commands that update the data we use in `Tld`,
`PostalCode`, and `PublicDomainSuffix`.
2026-01-07 09:48:50 +01:00
Henrique Moody
81310cc4d9
Rename namespace Rules to Validators
Since that namespace contains our “validators”, naming it as such makes
much more sense.
2026-01-05 17:36:35 +01:00
Henrique Moody
191922cf38
Rename RuleSpec to ValidatorSpec
That name makes more sense in relation to how the codebase currently
calls validators.
2026-01-05 17:36:35 +01:00
Henrique Moody
5afb69d6ad
Rename RuleFactory to ValidatorFactory
Since this factory creates “validators”, it makes sense that its name
follows the same name as the objects it creates.
2026-01-05 17:36:35 +01:00
Henrique Moody
54ac76adce
Rename Rule to Validator
The name "rule" has always been confusing to me. It can be when you talk
about "validation rules", but it’s a very verbose way to describe it,
and it doesn’t work all the time.

This commit will rename the interface `Rule` to `Validator`, but it will
also rename the concept of "rule" to "validator".
2026-01-05 17:36:34 +01:00
Henrique Moody
1a2c52079f
Rename Validator to ValidatorBuilder
The `Validator` class implements the Builder patterns, because it builds
a complex validator within a chain. This is a major breaking change, as
the `Validator` class is the foundation of the library. However, that’s
something relatively easy to replace everywhere.
2026-01-05 11:57:40 +01:00
Davide Spagnoli
a74258f1e7
Reset missing date information in CanValidateDateTime
Missing date information are now reset to 0 (1970-01-01T00:00:00),
because otherwise they are taken from current date/time, so:
`Respect\Validation\Validator::date("m")->isValid('06')` is not valid on
31st of every month.
2026-01-04 21:49:39 +01:00
Henrique Moody
a5ac80c733
Do not instantiate objects in the constructor of core classes
This can sometimes interfere with how dependency injection containers
work, and since we’re using a dependency injection container, this
becomes easier to manage.
2026-01-04 15:46:40 +01:00
Henrique Moody
0a45eaf9e4
Create All rule and all prefix
This rule behaves similarly to ``Each, but the difference is that it
presents the messages in a simpler manner. This allows users to have a
simpler message when validating all items in an array or iterable
value.

I’m also introducing the `all` prefix, making it easier for users to
apply the `All` rule in combination with other rules.
2026-01-04 12:23:01 +01:00
Henrique Moody
ec70cf7bc2
Ensure formatters only format, not modify results
When I changed the library to not overwrite existing names [1], I wasn't
happy with how `FirstResultStringFormatter` was changing the results,
because the results should be completely ready by the time they arrive
in the formatters.

This commit changes that behaviour, ensuring the results are complete
with all necessary information by the time they reach the formatters.

Along with those changes, I refactored some stringifiers and simplified
the `InterpolationRenderer`; we were not overwriting the "name"
parameter anyway, as it was just an unnecessary overhead.

[1] 8332d28acc
2026-01-03 19:47:30 +01:00
Henrique Moody
b5ad7aa47a
Make Validator immutable
Mutable objects can be challenging to work with in larger codebases
because different parts of a system may modify the same instance, making
it difficult to trace where and when changes occurred. This becomes
especially problematic when debugging unexpected behaviour.

By making `Validator` immutable, we ensure that adding rules via
`with()` returns a new instance rather than mutating the original, and
we use the `with()` method inside `__call()`, making every call to a
rule into a clone of the current `Validator`.

This provides several benefits:

1. Predictability: A `Validator` instance will always behave the same
   way throughout its lifetime, regardless of what other parts of the
   codebase do.

2. Safe dependency injection: Users can now confidently inject a base
   `Validator` from a DI container, knowing that any modifications made
   elsewhere will not affect their instance.

3. Easier debugging: Since validators cannot be mutated after creation,
   there's no need to track down where an unexpected rule was added.

4. Reusability: Users can create an initial `Validator` with some base
   rules and reuse it by just adding new rules to the chain without
   affecting the base `Validator`.
2026-01-02 15:45:23 +01:00