validation.newValuePointerValidator - Code Metrics - Inspection of "Merge pull request #47 from muonsoft/tests-updated" - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

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Push — main ( 3f29c3...92079a )

by Rushan

created 2021-05-18 18:35 UTC

validation.newValuePointerValidator B

↳ Parent: validation.go

Complexity

Conditions

Size

Total Lines	32
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	8.3518

Importance

Changes

Metric	Value
cc	8
eloc	24
dl	0
loc	32
ccs	14
cts	17
cp	0.8235
crap	8.3518
rs	7.3333
c	0
b	0
f	0
nop	2

// Copyright 2021 Igor Lazarev. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

// Package validation provides tools for data validation.
// It is designed to create complex validation rules with abilities to hook into the validation process.
package validation

import (
	"reflect"
	"time"

	"github.com/muonsoft/validation/generic"
)

// Validatable is interface for creating validatable types on the client side.
// By using it you can build complex validation rules on a set of objects used in other objects.
//
// Example
//  type Book struct {
//      Title    string
//      Author   string
//      Keywords []string
//  }
//
//  func (b Book) Validate(validator *validation.Validator) error {
//      return validator.Validate(
//          validation.StringProperty("title", &b.Title, it.IsNotBlank()),
//          validation.StringProperty("author", &b.Author, it.IsNotBlank()),
//          validation.CountableProperty("keywords", len(b.Keywords), it.HasCountBetween(1, 10)),
//          validation.EachStringProperty("keywords", b.Keywords, it.IsNotBlank()),
//      )
//  }
type Validatable interface {
	Validate(validator *Validator) error
}

// Filter is used for processing the list of errors to return a single ViolationList.
// If there is at least one non-violation error it will return it instead.
func Filter(violations ...error) error {
	filteredViolations := make(ViolationList, 0, len(violations))

	for _, err := range violations {
		addErr := filteredViolations.AppendFromError(err)
		if addErr != nil {
			return addErr
		}
	}

	return filteredViolations.AsError()
}

// ValidateByConstraintFunc is used for building validation functions for the values of specific types.
type ValidateByConstraintFunc func(constraint Constraint, scope Scope) error

type validateFunc func(scope Scope) (ViolationList, error)

var validatableType = reflect.TypeOf((*Validatable)(nil)).Elem()

func newValueValidator(value interface{}, options []Option) (validateFunc, error) {
	switch v := value.(type) {
	case Validatable:
		return newValidValidator(v, options), nil
	case time.Time:
		return newTimeValidator(&v, options), nil
	case *time.Time:
		return newTimeValidator(v, options), nil
	}

	v := reflect.ValueOf(value)

	switch v.Kind() {
	case reflect.Ptr:
		return newValuePointerValidator(v, options)
	case reflect.Bool:
		b := v.Bool()
		return newBoolValidator(&b, options), nil
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
		reflect.Float32, reflect.Float64:
		n, err := generic.NewNumber(value)
		if err != nil {
			return nil, err
		}

		return newNumberValidator(*n, options), nil
	case reflect.String:
		s := v.String()
		return newStringValidator(&s, options), nil
	case reflect.Array, reflect.Slice, reflect.Map:
		i, err := generic.NewIterable(value)
		if err != nil {
			return nil, err
		}

		return newIterableValidator(i, options), nil
	}

	return nil, &NotValidatableError{Value: v}
}

func newValuePointerValidator(value reflect.Value, options []Option) (validateFunc, error) {
	p := value.Elem()
	if value.IsNil() {
		return newNilValidator(options), nil
	}

	switch p.Kind() {
	case reflect.Bool:
		b := p.Bool()
		return newBoolValidator(&b, options), nil
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
		reflect.Float32, reflect.Float64:
		n, err := generic.NewNumber(p.Interface())
		if err != nil {
			return nil, err
		}

		return newNumberValidator(*n, options), nil
	case reflect.String:
		s := p.String()
		return newStringValidator(&s, options), nil
	case reflect.Array, reflect.Slice, reflect.Map:
		i, err := generic.NewIterable(p.Interface())
		if err != nil {
			return nil, err
		}

		return newIterableValidator(i, options), nil
	}

	return nil, &NotValidatableError{Value: value}
}

func newNilValidator(options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if constraintValidator, ok := constraint.(NilConstraint); ok {
			return constraintValidator.ValidateNil(scope)
		}

		return nil
	})
}

func newBoolValidator(value *bool, options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if c, ok := constraint.(BoolConstraint); ok {
			return c.ValidateBool(value, scope)
		}

		return NewInapplicableConstraintError(constraint, "bool")
	})
}

func newNumberValidator(value generic.Number, options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if c, ok := constraint.(NumberConstraint); ok {
			return c.ValidateNumber(value, scope)
		}

		return NewInapplicableConstraintError(constraint, "number")
	})
}

func newStringValidator(value *string, options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if c, ok := constraint.(StringConstraint); ok {
			return c.ValidateString(value, scope)
		}

		return NewInapplicableConstraintError(constraint, "string")
	})
}

func newIterableValidator(iterable generic.Iterable, options []Option) validateFunc {
	return func(scope Scope) (ViolationList, error) {
		err := scope.applyOptions(options...)
		if err != nil {
			return nil, err
		}

		violations, err := validateOnScope(scope, options, func(constraint Constraint, scope Scope) error {
			if c, ok := constraint.(IterableConstraint); ok {
				return c.ValidateIterable(iterable, scope)
			}

			return NewInapplicableConstraintError(constraint, "iterable")
		})
		if err != nil {
			return nil, err
		}

		if iterable.IsElementImplements(validatableType) {
			vs, err := validateIterableOfValidatables(scope, iterable)
			if err != nil {
				return nil, err
			}
			violations = append(violations, vs...)
		}

		return violations, nil
	}
}

func newCountableValidator(count int, options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if c, ok := constraint.(CountableConstraint); ok {
			return c.ValidateCountable(count, scope)
		}

		return NewInapplicableConstraintError(constraint, "countable")
	})
}

func newTimeValidator(value *time.Time, options []Option) validateFunc {
	return newValidator(options, func(constraint Constraint, scope Scope) error {
		if c, ok := constraint.(TimeConstraint); ok {
			return c.ValidateTime(value, scope)
		}

		return NewInapplicableConstraintError(constraint, "time")
	})
}

func newEachValidator(iterable generic.Iterable, options []Option) validateFunc {
	return func(scope Scope) (ViolationList, error) {
		violations := make(ViolationList, 0)

		err := iterable.Iterate(func(key generic.Key, value interface{}) error {
			opts := options
			if key.IsIndex() {
				opts = append(opts, ArrayIndex(key.Index()))
			} else {
				opts = append(opts, PropertyName(key.String()))
			}

			validate, err := newValueValidator(value, opts)
			if err != nil {
				return err
			}

			vs, err := validate(scope)
			if err != nil {
				return err
			}
			violations = append(violations, vs...)

			return nil
		})

		return violations, err
	}
}

func newEachStringValidator(values []string, options []Option) validateFunc {
	return func(scope Scope) (ViolationList, error) {
		violations := make(ViolationList, 0)

		for i := range values {
			opts := append(options, ArrayIndex(i))
			validate := newStringValidator(&values[i], opts)
			vs, err := validate(scope)
			if err != nil {
				return nil, err
			}
			violations = append(violations, vs...)
		}

		return violations, nil
	}
}

func newValidValidator(value Validatable, options []Option) validateFunc {
	return func(scope Scope) (ViolationList, error) {
		err := scope.applyOptions(options...)
		if err != nil {
			return nil, err
		}

		err = value.Validate(newScopedValidator(scope))
		violations, ok := UnwrapViolationList(err)
		if ok {
			return violations, nil
		}

		return nil, err
	}
}

func newValidator(options []Option, validate ValidateByConstraintFunc) validateFunc {
	return func(scope Scope) (ViolationList, error) {
		err := scope.applyOptions(options...)
		if err != nil {
			return nil, err
		}

		return validateOnScope(scope, options, validate)
	}
}

func validateOnScope(scope Scope, options []Option, validate ValidateByConstraintFunc) (ViolationList, error) {
	violations := make(ViolationList, 0)

	for _, option := range options {
		if constraint, ok := option.(controlConstraint); ok {
			vs, err := constraint.validate(scope, validate)
			if err != nil {
				return nil, err
			}

			violations = append(violations, vs...)
		} else if constraint, ok := option.(Constraint); ok {
			err := violations.AppendFromError(validate(constraint, scope))
			if err != nil {
				return nil, err
			}
		}
	}

	return violations, nil
}

func validateIterableOfValidatables(scope Scope, iterable generic.Iterable) (ViolationList, error) {
	violations := make(ViolationList, 0)

	err := iterable.Iterate(func(key generic.Key, value interface{}) error {
		s := scope
		if key.IsIndex() {
			s = s.atIndex(key.Index())
		} else {
			s = s.atProperty(key.String())
		}

		validate := newValidValidator(value.(Validatable), nil)
		vs, err := validate(s)
		if err != nil {
			return err
		}

		violations = append(violations, vs...)

		return nil
	})

	return violations, err
}


1		// Copyright 2021 Igor Lazarev. All rights reserved.
2		// Use of this source code is governed by a MIT-style
3		// license that can be found in the LICENSE file.
4
5		// Package validation provides tools for data validation.
6		// It is designed to create complex validation rules with abilities to hook into the validation process.
7		package validation
8
9		import (
10		"reflect"
11		"time"
12
13		"github.com/muonsoft/validation/generic"
14		)
15
16		// Validatable is interface for creating validatable types on the client side.
17		// By using it you can build complex validation rules on a set of objects used in other objects.
18		//
19		// Example
20		// type Book struct {
21		// Title string
22		// Author string
23		// Keywords []string
24		// }
25		//
26		// func (b Book) Validate(validator *validation.Validator) error {
27		// return validator.Validate(
28		// validation.StringProperty("title", &b.Title, it.IsNotBlank()),
29		// validation.StringProperty("author", &b.Author, it.IsNotBlank()),
30		// validation.CountableProperty("keywords", len(b.Keywords), it.HasCountBetween(1, 10)),
31		// validation.EachStringProperty("keywords", b.Keywords, it.IsNotBlank()),
32		// )
33		// }
34		type Validatable interface {
35		Validate(validator *Validator) error
36		}
37
38		// Filter is used for processing the list of errors to return a single ViolationList.
39		// If there is at least one non-violation error it will return it instead.
40		func Filter(violations ...error) error {
41	1	filteredViolations := make(ViolationList, 0, len(violations))
42
43	1	for _, err := range violations {
44	1	addErr := filteredViolations.AppendFromError(err)
45	1	if addErr != nil {
46	1	return addErr
47		}
48		}
49
50	1	return filteredViolations.AsError()
51		}
52
53		// ValidateByConstraintFunc is used for building validation functions for the values of specific types.
54		type ValidateByConstraintFunc func(constraint Constraint, scope Scope) error
55
56		type validateFunc func(scope Scope) (ViolationList, error)
57
58		var validatableType = reflect.TypeOf((*Validatable)(nil)).Elem()
59
60		func newValueValidator(value interface{}, options []Option) (validateFunc, error) {
61	1	switch v := value.(type) {
62		case Validatable:
63	1	return newValidValidator(v, options), nil
64		case time.Time:
65	1	return newTimeValidator(&v, options), nil
66		case *time.Time:
67	1	return newTimeValidator(v, options), nil
68		}
69
70	1	v := reflect.ValueOf(value)
71
72	1	switch v.Kind() {
73		case reflect.Ptr:
74	1	return newValuePointerValidator(v, options)
75		case reflect.Bool:
76	1	b := v.Bool()
77	1	return newBoolValidator(&b, options), nil
78		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
79		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
80		reflect.Float32, reflect.Float64:
81	1	n, err := generic.NewNumber(value)
82	1	if err != nil {
83		return nil, err
84		}
85
86	1	return newNumberValidator(*n, options), nil
87		case reflect.String:
88	1	s := v.String()
89	1	return newStringValidator(&s, options), nil
90		case reflect.Array, reflect.Slice, reflect.Map:
91	1	i, err := generic.NewIterable(value)
92	1	if err != nil {
93		return nil, err
94		}
95
96	1	return newIterableValidator(i, options), nil
97		}
98
99	1	return nil, &NotValidatableError{Value: v}
100		}
101
102		func newValuePointerValidator(value reflect.Value, options []Option) (validateFunc, error) {
103	1	p := value.Elem()
104	1	if value.IsNil() {
105	1	return newNilValidator(options), nil
106		}
107
108	1	switch p.Kind() {
109		case reflect.Bool:
110	1	b := p.Bool()
111	1	return newBoolValidator(&b, options), nil
112		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
113		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
114		reflect.Float32, reflect.Float64:
115	1	n, err := generic.NewNumber(p.Interface())
116	1	if err != nil {
117		return nil, err
118		}
119
120	1	return newNumberValidator(*n, options), nil
121		case reflect.String:
122	1	s := p.String()
123	1	return newStringValidator(&s, options), nil
124		case reflect.Array, reflect.Slice, reflect.Map:
125	1	i, err := generic.NewIterable(p.Interface())
126	1	if err != nil {
127		return nil, err
128		}
129
130	1	return newIterableValidator(i, options), nil
131		}
132
133		return nil, &NotValidatableError{Value: value}
134		}
135
136		func newNilValidator(options []Option) validateFunc {
137	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
138	1	if constraintValidator, ok := constraint.(NilConstraint); ok {
139	1	return constraintValidator.ValidateNil(scope)
140		}
141
142		return nil
143		})
144		}
145
146		func newBoolValidator(value *bool, options []Option) validateFunc {
147	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
148	1	if c, ok := constraint.(BoolConstraint); ok {
149	1	return c.ValidateBool(value, scope)
150		}
151
152	1	return NewInapplicableConstraintError(constraint, "bool")
153		})
154		}
155
156		func newNumberValidator(value generic.Number, options []Option) validateFunc {
157	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
158	1	if c, ok := constraint.(NumberConstraint); ok {
159	1	return c.ValidateNumber(value, scope)
160		}
161
162	1	return NewInapplicableConstraintError(constraint, "number")
163		})
164		}
165
166		func newStringValidator(value *string, options []Option) validateFunc {
167	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
168	1	if c, ok := constraint.(StringConstraint); ok {
169	1	return c.ValidateString(value, scope)
170		}
171
172	1	return NewInapplicableConstraintError(constraint, "string")
173		})
174		}
175
176		func newIterableValidator(iterable generic.Iterable, options []Option) validateFunc {
177	1	return func(scope Scope) (ViolationList, error) {
178	1	err := scope.applyOptions(options...)
179	1	if err != nil {
180		return nil, err
181		}
182
183	1	violations, err := validateOnScope(scope, options, func(constraint Constraint, scope Scope) error {
184	1	if c, ok := constraint.(IterableConstraint); ok {
185	1	return c.ValidateIterable(iterable, scope)
186		}
187
188	1	return NewInapplicableConstraintError(constraint, "iterable")
189		})
190	1	if err != nil {
191	1	return nil, err
192		}
193
194	1	if iterable.IsElementImplements(validatableType) {
195	1	vs, err := validateIterableOfValidatables(scope, iterable)
196	1	if err != nil {
197		return nil, err
198		}
199	1	violations = append(violations, vs...)
200		}
201
202	1	return violations, nil
203		}
204		}
205
206		func newCountableValidator(count int, options []Option) validateFunc {
207	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
208	1	if c, ok := constraint.(CountableConstraint); ok {
209	1	return c.ValidateCountable(count, scope)
210		}
211
212	1	return NewInapplicableConstraintError(constraint, "countable")
213		})
214		}
215
216		func newTimeValidator(value *time.Time, options []Option) validateFunc {
217	1	return newValidator(options, func(constraint Constraint, scope Scope) error {
218	1	if c, ok := constraint.(TimeConstraint); ok {
219	1	return c.ValidateTime(value, scope)
220		}
221
222	1	return NewInapplicableConstraintError(constraint, "time")
223		})
224		}
225
226		func newEachValidator(iterable generic.Iterable, options []Option) validateFunc {
227	1	return func(scope Scope) (ViolationList, error) {
228	1	violations := make(ViolationList, 0)
229
230	1	err := iterable.Iterate(func(key generic.Key, value interface{}) error {
231	1	opts := options
232	1	if key.IsIndex() {
233	1	opts = append(opts, ArrayIndex(key.Index()))
234		} else {
235	1	opts = append(opts, PropertyName(key.String()))
236		}
237
238	1	validate, err := newValueValidator(value, opts)
239	1	if err != nil {
240		return err
241		}
242
243	1	vs, err := validate(scope)
244	1	if err != nil {
245		return err
246		}
247	1	violations = append(violations, vs...)
248
249	1	return nil
250		})
251
252	1	return violations, err
253		}
254		}
255
256		func newEachStringValidator(values []string, options []Option) validateFunc {
257	1	return func(scope Scope) (ViolationList, error) {
258	1	violations := make(ViolationList, 0)
259
260	1	for i := range values {
261	1	opts := append(options, ArrayIndex(i))
262	1	validate := newStringValidator(&values[i], opts)
263	1	vs, err := validate(scope)
264	1	if err != nil {
265		return nil, err
266		}
267	1	violations = append(violations, vs...)
268		}
269
270	1	return violations, nil
271		}
272		}
273
274		func newValidValidator(value Validatable, options []Option) validateFunc {
275	1	return func(scope Scope) (ViolationList, error) {
276	1	err := scope.applyOptions(options...)
277	1	if err != nil {
278		return nil, err
279		}
280
281	1	err = value.Validate(newScopedValidator(scope))
282	1	violations, ok := UnwrapViolationList(err)
283	1	if ok {
284	1	return violations, nil
285		}
286
287		return nil, err
288		}
289		}
290
291		func newValidator(options []Option, validate ValidateByConstraintFunc) validateFunc {
292	1	return func(scope Scope) (ViolationList, error) {
293	1	err := scope.applyOptions(options...)
294	1	if err != nil {
295	1	return nil, err
296		}
297
298	1	return validateOnScope(scope, options, validate)
299		}
300		}
301
302		func validateOnScope(scope Scope, options []Option, validate ValidateByConstraintFunc) (ViolationList, error) {
303	1	violations := make(ViolationList, 0)
304
305	1	for _, option := range options {
306	1	if constraint, ok := option.(controlConstraint); ok {
307	1	vs, err := constraint.validate(scope, validate)
308	1	if err != nil {
309		return nil, err
310		}
311
312	1	violations = append(violations, vs...)
313	1	} else if constraint, ok := option.(Constraint); ok {
314	1	err := violations.AppendFromError(validate(constraint, scope))
315	1	if err != nil {
316	1	return nil, err
317		}
318		}
319		}
320
321	1	return violations, nil
322		}
323
324		func validateIterableOfValidatables(scope Scope, iterable generic.Iterable) (ViolationList, error) {
325	1	violations := make(ViolationList, 0)
326
327	1	err := iterable.Iterate(func(key generic.Key, value interface{}) error {
328	1	s := scope
329	1	if key.IsIndex() {
330	1	s = s.atIndex(key.Index())
331		} else {
332	1	s = s.atProperty(key.String())
333		}
334
335	1	validate := newValidValidator(value.(Validatable), nil)
336	1	vs, err := validate(s)
337	1	if err != nil {
338		return err
339		}
340
341	1	violations = append(violations, vs...)
342
343	1	return nil
344		})
345
346	1	return violations, err
347		}
348

muonsoft / validation

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validation.newValuePointerValidator B

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