66 lines
2.1 KiB
Go
66 lines
2.1 KiB
Go
// Valiwork - validations that works.
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// Copyright (c) 2020 by Stanislav Nikitin <pztrn@pztrn.name>
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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package main
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import (
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"strings"
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// stdlib
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"errors"
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"log"
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// other
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"go.dev.pztrn.name/valiwork"
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)
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const (
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stringValidatorName = "string_validate_things"
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)
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func main() {
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log.Println("Starting validation example...")
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log.Println("WARN: to see additional valiwork output define 'VALIWORK_DEBUG' environment variable and set it to 'true'!")
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//stringToValidate := " I am pretty b@d $tring"
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_ = valiwork.RegisterValidator(stringValidatorName, stringValidator)
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}
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func stringValidator(thing interface{}, optional ...interface{}) []interface{} {
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var errs []interface{}
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stringToValidate, ok := thing.(string)
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if !ok {
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errs = append(errs, errors.New("passed value is not a string"))
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return errs
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}
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// Are string begins with spaces?
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if strings.HasPrefix(stringToValidate, " ") {
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errs = append(errs, errors.New("string begins with space"))
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}
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// Does string contains any special characters?
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return errs
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}
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