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| 1 | +// Copyright 2020 DSR Corporation |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package validator |
| 16 | + |
| 17 | +import ( |
| 18 | + "fmt" |
| 19 | + |
| 20 | + sdk "github.com/cosmos/cosmos-sdk/types" |
| 21 | + "github.com/go-playground/locales/en" |
| 22 | + ut "github.com/go-playground/universal-translator" |
| 23 | + "github.com/go-playground/validator/v10" |
| 24 | + en_translations "github.com/go-playground/validator/v10/translations/en" |
| 25 | +) |
| 26 | + |
| 27 | +var ( |
| 28 | + uni *ut.UniversalTranslator |
| 29 | + vl *validator.Validate |
| 30 | +) |
| 31 | + |
| 32 | +func validate(s interface{}, performAddValidation bool) sdk.Error { |
| 33 | + |
| 34 | + en := en.New() |
| 35 | + uni = ut.New(en, en) |
| 36 | + |
| 37 | + trans, _ := uni.GetTranslator("en") |
| 38 | + |
| 39 | + vl = validator.New() |
| 40 | + |
| 41 | + vl.RegisterValidation("requiredForAdd", onlyRequiredForAdd) |
| 42 | + en_translations.RegisterDefaultTranslations(vl, trans) |
| 43 | + |
| 44 | + _ = vl.RegisterTranslation("required", trans, func(ut ut.Translator) error { |
| 45 | + return ut.Add("required", "{0} is a required field", true) // see universal-translator for details |
| 46 | + }, func(ut ut.Translator, fe validator.FieldError) string { |
| 47 | + t, _ := ut.T("required", fe.Field()) |
| 48 | + return t |
| 49 | + }) |
| 50 | + |
| 51 | + _ = vl.RegisterTranslation("requiredForAdd", trans, func(ut ut.Translator) error { |
| 52 | + return ut.Add("requiredForAdd", "{0} is a required field", true) |
| 53 | + }, func(ut ut.Translator, fe validator.FieldError) string { |
| 54 | + t, _ := ut.T("requiredForAdd", fe.Field()) |
| 55 | + return t |
| 56 | + }) |
| 57 | + |
| 58 | + _ = vl.RegisterTranslation("max", trans, func(ut ut.Translator) error { |
| 59 | + return ut.Add("max", "maximum length for {0} allowed is {1}", true) |
| 60 | + }, func(ut ut.Translator, fe validator.FieldError) string { |
| 61 | + t, _ := ut.T("max", fe.Field(), fe.Param()) |
| 62 | + return t |
| 63 | + }) |
| 64 | + |
| 65 | + _ = vl.RegisterTranslation("url", trans, func(ut ut.Translator) error { |
| 66 | + return ut.Add("url", "Field {0} : {1} is not a valid url", true) |
| 67 | + }, func(ut ut.Translator, fe validator.FieldError) string { |
| 68 | + t, _ := ut.T("url", fe.Field(), fmt.Sprintf("%v", fe.Value())) |
| 69 | + return t |
| 70 | + }) |
| 71 | + |
| 72 | + errs := vl.Struct(s) |
| 73 | + |
| 74 | + if errs != nil { |
| 75 | + for _, e := range errs.(validator.ValidationErrors) { |
| 76 | + if e.Tag() == "max" { |
| 77 | + return sdk.NewError(Codespace, CodeFieldMaxLengthExceeded, e.Translate(trans)) |
| 78 | + } |
| 79 | + if e.Tag() == "required" { |
| 80 | + return sdk.NewError(Codespace, CodeRequiredFieldMissing, e.Translate(trans)) |
| 81 | + } |
| 82 | + if e.Tag() == "requiredForAdd" && performAddValidation { |
| 83 | + return sdk.NewError(Codespace, CodeRequiredFieldMissing, e.Translate(trans)) |
| 84 | + } |
| 85 | + if e.Tag() == "url" { |
| 86 | + return sdk.NewError(Codespace, CodeFieldNotValid, e.Translate(trans)) |
| 87 | + } |
| 88 | + |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + return nil |
| 93 | +} |
| 94 | + |
| 95 | +func ValidateUpdate(s interface{}) sdk.Error { |
| 96 | + return validate(s, false) |
| 97 | +} |
| 98 | + |
| 99 | +func ValidateAdd(s interface{}) sdk.Error { |
| 100 | + return validate(s, true) |
| 101 | + |
| 102 | +} |
| 103 | + |
| 104 | +func onlyRequiredForAdd(fl validator.FieldLevel) bool { |
| 105 | + if fl.Field().String() == "" { |
| 106 | + return false |
| 107 | + } else { |
| 108 | + return true |
| 109 | + } |
| 110 | +} |
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