VALID

Internally this library works by recursively parsing a struct, getting all the "validate" tags from it, then creating tokens from the tags (see: valid/lexer.go), actual validation is then performed by valid/valdsl.go

• tests/valid_test.go - Test case.
• valid/context.go - Context class for calling validation functions, has the actual struct we're validating.
• valid/helper.go - Helper functions for validation functions defined in predefined.go
• valid/lexer.go - Parses a struct for "validate" tags and tokenizes it.
• valid/predefined.go - Validation functions.
• valid/valdsl.go - Parses tokens and performs validation.

EXAMPLES

• See tests/valid_test.go

Copy/Paste

import (
	"github.com/xsnews/mcore/valid/valid"
	"github.com/xsnews/webutils/httpd"
)

...

type LoginInput struct {
	Email string `validate:"def(type=email),onlyif(Sys=[std])"`
	Ldap  string `validate:"def(type=slug),onlyif(Sys=[ldap])"`
	Pass  string `validate:"def(type=)"`
	Sys   string `validate:"oneof(enum=[std,ldap])"`
}

...

	var (
		input LoginInput
	)

	if e := valid.ParseJson(&input, r); e != nil {
		httpd.Error(w, e, "Input invalid")
		return
	}
	if ok, missing := valid.Validate(n); !ok {
		httpd.Error(w, nil, "Input invalid: "+fmt.Sprintf("%+v", missing))
		return
	}

TODO

• Refactor valdsl.go token parser.
• Add a syntax checker to valdsl.
• Finish predefined functions.
• Cleanup helper.go functions.