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Package chain-validation
Short Description Classes which implements the Chain of Responsibility pattern in validating data. Intended primary use is for handling complex validations.
License MIT
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Informations about the package chain-validation
Chain Validation
Notice:
The latest build is 0.2.x and is not backwards compatible with 0.1.x versions. See Migration for details.
Alternatively, you can read 0.1.x-README.md for versions 0.1.x.
Chain Validation is a simple PHP library for handling very complex validations that goes beyond checking of data types, format and values of a given data. It uses the Chain of Responsibility design pattern in order to execute each validation in a consecutive manner. The execution will stop once an error occured during the validation process within a link. You can alter the data as it goes through the chain, depending on your requirements.
Usage
Defining and executing validations
Usage is simple. First, group your validations by purpose/relevance and create a new class for each validation group which extends the AbstractLink class.
You can run the validations using the ChainValidation class. The chain process each validation in exact order or in First in, First out manner.
Catching errors
To know whether an error occured or not, you can use the hasError() function of the ChainValidation class and get the error message using the getErrorMessage() function after the validation execution. You can get the corresponding error code using the getErrorCode() function.
If the chain validation succeeds, it will return the validated data, otherwise it will return null.
Errors with a body
There are instances where errors messages are not enough, especially on front-end applications that highlight specific errors on their UI. Hence, a new parameter was added to the constructor of the ResultFailed class in order to pass the this data to the chain.
The error data can be obtained through the getErrorBody() function of the ChainValidation class and LinkInterface implementations.
Migration from 0.1.x to 0.2.x
In order to migrate from 0.1.x to 0.2.x, you just need to replace the execute function on each link with the evaluate function.
From v0.1.x
to v0.2.x
Tests
Run the tests using composer test.
Tests with mocking of Link's evaluate function are added.
