it.RegexpConstraint.ValidateString - Code Metrics - Inspection of "refactoring: replace codes by errors" - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Pull Request — main (#74)

by Igor

created 2022-06-30 14:57 UTC

it.RegexpConstraint.ValidateString B

↳ Parent: it/string.go

Complexity

Conditions

Size

Total Lines	19
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	7

Importance

Changes

Metric	Value
cc	7
eloc	13
dl	0
loc	19
rs	8
c	0
b	0
f	0
ccs	5
cts	5
cp	1
crap	7
nop	2

package it

import (
	"regexp"
	"strconv"
	"unicode/utf8"

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

// LengthConstraint checks that a given string length is between some minimum and maximum value.
// If you want to check the length of the array, slice or a map use CountConstraint.
type LengthConstraint struct {
	isIgnored              bool
	checkMin               bool
	checkMax               bool
	min                    int
	max                    int
	groups                 []string
	minErr                 error
	maxErr                 error
	exactErr               error
	minMessageTemplate     string
	minMessageParameters   validation.TemplateParameterList
	maxMessageTemplate     string
	maxMessageParameters   validation.TemplateParameterList
	exactMessageTemplate   string
	exactMessageParameters validation.TemplateParameterList
}

func newLengthConstraint(min int, max int, checkMin bool, checkMax bool) LengthConstraint {
	return LengthConstraint{
		min:                  min,
		max:                  max,
		checkMin:             checkMin,
		checkMax:             checkMax,
		minErr:               validation.ErrTooShort,
		maxErr:               validation.ErrTooLong,
		exactErr:             validation.ErrNotExactLength,
		minMessageTemplate:   validation.ErrTooShort.Template(),
		maxMessageTemplate:   validation.ErrTooLong.Template(),
		exactMessageTemplate: validation.ErrNotExactLength.Template(),
	}
}

// HasMinLength creates a LengthConstraint that checks the length of the string
// is greater than the minimum value.
func HasMinLength(min int) LengthConstraint {
	return newLengthConstraint(min, 0, true, false)
}

// HasMaxLength creates a LengthConstraint that checks the length of the string
// is less than the maximum value.
func HasMaxLength(max int) LengthConstraint {
	return newLengthConstraint(0, max, false, true)
}

// HasLengthBetween creates a LengthConstraint that checks the length of the string
// is between some minimum and maximum value.
func HasLengthBetween(min int, max int) LengthConstraint {
	return newLengthConstraint(min, max, true, true)
}

// HasExactLength creates a LengthConstraint that checks the length of the string
// has exact value.
func HasExactLength(count int) LengthConstraint {
	return newLengthConstraint(count, count, true, true)
}

// When enables conditional validation of this constraint. If the expression evaluates to false,
// then the constraint will be ignored.
func (c LengthConstraint) When(condition bool) LengthConstraint {
	c.isIgnored = !condition
	return c
}

// WhenGroups enables conditional validation of the constraint by using the validation groups.
func (c LengthConstraint) WhenGroups(groups ...string) LengthConstraint {
	c.groups = groups
	return c
}

// WithMinError overrides default underlying error for violation that will be shown if the string length
// is less than the minimum value.
func (c LengthConstraint) WithMinError(err error) LengthConstraint {
	c.minErr = err
	return c
}

// WithMaxError overrides default underlying error for violation that will be shown if the string length
// is greater than the maximum value.
func (c LengthConstraint) WithMaxError(err error) LengthConstraint {
	c.maxErr = err
	return c
}

// WithExactError overrides default underlying error for violation that will be shown if minimum and maximum values
// are equal and the length of the string is not exactly this value.
func (c LengthConstraint) WithExactError(err error) LengthConstraint {
	c.exactErr = err
	return c
}

// WithMinMessage sets the violation message that will be shown if the string length is less than
// the minimum value. You can set custom template parameters for injecting its values
// into the final message. Also, you can use default parameters:
//
//	{{ length }} - the current string length;
//	{{ limit }} - the lower limit;
//	{{ value }} - the current (invalid) value.
func (c LengthConstraint) WithMinMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
	c.minMessageTemplate = template
	c.minMessageParameters = parameters
	return c
}

// WithMaxMessage sets the violation message that will be shown if the string length is greater than
// the maximum value. You can set custom template parameters for injecting its values
// into the final message. Also, you can use default parameters:
//
//	{{ length }} - the current string length;
//	{{ limit }} - the lower limit;
//	{{ value }} - the current (invalid) value.
func (c LengthConstraint) WithMaxMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
	c.maxMessageTemplate = template
	c.maxMessageParameters = parameters
	return c
}

// WithExactMessage sets the violation message that will be shown if minimum and maximum values are equal and
// the length of the string is not exactly this value. You can set custom template parameters
// for injecting its values into the final message. Also, you can use default parameters:
//
//	{{ length }} - the current string length;
//	{{ limit }} - the lower limit;
//	{{ value }} - the current (invalid) value.
func (c LengthConstraint) WithExactMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
	c.exactMessageTemplate = template
	c.exactMessageParameters = parameters
	return c
}

func (c LengthConstraint) ValidateString(value *string, scope validation.Scope) error {
	if c.isIgnored || scope.IsIgnored(c.groups...) || value == nil || *value == "" {
		return nil
	}

	count := utf8.RuneCountInString(*value)

	if c.checkMax && count > c.max {
		return c.newViolation(count, c.max, *value, c.maxErr, c.maxMessageTemplate, c.maxMessageParameters, scope)
	}
	if c.checkMin && count < c.min {
		return c.newViolation(count, c.min, *value, c.minErr, c.minMessageTemplate, c.minMessageParameters, scope)
	}

	return nil
}

func (c LengthConstraint) newViolation(
	count, limit int,
	value string,
	err error,
	template string,
	parameters validation.TemplateParameterList,
	scope validation.Scope,
) validation.Violation {
	if c.checkMin && c.checkMax && c.min == c.max {
		template = c.exactMessageTemplate
		parameters = c.exactMessageParameters
		err = c.exactErr
	}

	return scope.BuildViolation(err, template).
		WithPluralCount(limit).
		WithParameters(
			parameters.Prepend(
				validation.TemplateParameter{Key: "{{ value }}", Value: strconv.Quote(value)},
				validation.TemplateParameter{Key: "{{ length }}", Value: strconv.Itoa(count)},
				validation.TemplateParameter{Key: "{{ limit }}", Value: strconv.Itoa(limit)},
			)...,
		).
		Create()
}

// RegexpConstraint is used to ensure that the given value corresponds to regex pattern.
type RegexpConstraint struct {
	isIgnored         bool
	match             bool
	groups            []string
	err               error
	messageTemplate   string
	messageParameters validation.TemplateParameterList
	regex             *regexp.Regexp
}

// Matches creates a RegexpConstraint for checking whether a value matches a regular expression.
func Matches(regex *regexp.Regexp) RegexpConstraint {
	return RegexpConstraint{
		regex:           regex,
		match:           true,
		err:             validation.ErrNotValid,
		messageTemplate: validation.ErrNotValid.Template(),
	}
}

// DoesNotMatch creates a RegexpConstraint for checking whether a value does not match a regular expression.
func DoesNotMatch(regex *regexp.Regexp) RegexpConstraint {
	return RegexpConstraint{
		regex:           regex,
		match:           false,
		err:             validation.ErrNotValid,
		messageTemplate: validation.ErrNotValid.Template(),
	}
}

// WithError overrides default error for produced violation.
func (c RegexpConstraint) WithError(err error) RegexpConstraint {
	c.err = err
	return c
}

// WithMessage sets the violation message template. You can set custom template parameters
// for injecting its values into the final message. Also, you can use default parameters:
//
//	{{ value }} - the current (invalid) value.
func (c RegexpConstraint) WithMessage(template string, parameters ...validation.TemplateParameter) RegexpConstraint {
	c.messageTemplate = template
	c.messageParameters = parameters
	return c
}

// When enables conditional validation of this constraint. If the expression evaluates to false,
// then the constraint will be ignored.
func (c RegexpConstraint) When(condition bool) RegexpConstraint {
	c.isIgnored = !condition
	return c
}

// WhenGroups enables conditional validation of the constraint by using the validation groups.
func (c RegexpConstraint) WhenGroups(groups ...string) RegexpConstraint {
	c.groups = groups
	return c
}

func (c RegexpConstraint) ValidateString(value *string, scope validation.Scope) error {
	if c.regex == nil {
		return scope.NewConstraintError("RegexpConstraint", "nil regex")
	}
	if c.isIgnored || scope.IsIgnored(c.groups...) || value == nil || *value == "" {
		return nil
	}
	if c.match == c.regex.MatchString(*value) {
		return nil
	}

	return scope.
		BuildViolation(c.err, c.messageTemplate).
		WithParameters(
			c.messageParameters.Prepend(
				validation.TemplateParameter{Key: "{{ value }}", Value: *value},
			)...,
		).
		Create()
}

// IsJSON validates that a value is a valid JSON.
func IsJSON() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(is.JSON).
		WithError(validation.ErrInvalidJSON).
		WithMessage(validation.ErrInvalidJSON.Template())
}

// IsInteger checks that string value is an integer.
func IsInteger() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(is.Integer).
		WithError(validation.ErrNotInteger).
		WithMessage(validation.ErrNotInteger.Template())
}

// IsNumeric checks that string value is a valid numeric (integer or float).
func IsNumeric() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(is.Number).
		WithError(validation.ErrNotNumeric).
		WithMessage(validation.ErrNotNumeric.Template())
}


1		package it
2
3		import (
4		"regexp"
5		"strconv"
6		"unicode/utf8"
7
8		"github.com/muonsoft/validation"
9		"github.com/muonsoft/validation/is"
10		)
11
12		// LengthConstraint checks that a given string length is between some minimum and maximum value.
13		// If you want to check the length of the array, slice or a map use CountConstraint.
14		type LengthConstraint struct {
15		isIgnored bool
16		checkMin bool
17		checkMax bool
18		min int
19		max int
20		groups []string
21		minErr error
22		maxErr error
23		exactErr error
24		minMessageTemplate string
25		minMessageParameters validation.TemplateParameterList
26		maxMessageTemplate string
27		maxMessageParameters validation.TemplateParameterList
28		exactMessageTemplate string
29		exactMessageParameters validation.TemplateParameterList
30		}
31
32		func newLengthConstraint(min int, max int, checkMin bool, checkMax bool) LengthConstraint {
33		return LengthConstraint{
34		min: min,
35	1	max: max,
36		checkMin: checkMin,
37		checkMax: checkMax,
38		minErr: validation.ErrTooShort,
39		maxErr: validation.ErrTooLong,
40		exactErr: validation.ErrNotExactLength,
41		minMessageTemplate: validation.ErrTooShort.Template(),
42		maxMessageTemplate: validation.ErrTooLong.Template(),
43		exactMessageTemplate: validation.ErrNotExactLength.Template(),
44		}
45		}
46
47		// HasMinLength creates a LengthConstraint that checks the length of the string
48		// is greater than the minimum value.
49		func HasMinLength(min int) LengthConstraint {
50		return newLengthConstraint(min, 0, true, false)
51		}
52	1
53		// HasMaxLength creates a LengthConstraint that checks the length of the string
54		// is less than the maximum value.
55		func HasMaxLength(max int) LengthConstraint {
56		return newLengthConstraint(0, max, false, true)
57		}
58	1
59		// HasLengthBetween creates a LengthConstraint that checks the length of the string
60		// is between some minimum and maximum value.
61		func HasLengthBetween(min int, max int) LengthConstraint {
62		return newLengthConstraint(min, max, true, true)
63		}
64	1
65		// HasExactLength creates a LengthConstraint that checks the length of the string
66		// has exact value.
67		func HasExactLength(count int) LengthConstraint {
68		return newLengthConstraint(count, count, true, true)
69		}
70	1
71		// When enables conditional validation of this constraint. If the expression evaluates to false,
72		// then the constraint will be ignored.
73		func (c LengthConstraint) When(condition bool) LengthConstraint {
74		c.isIgnored = !condition
75	1	return c
76		}
77
78		// WhenGroups enables conditional validation of the constraint by using the validation groups.
79		func (c LengthConstraint) WhenGroups(groups ...string) LengthConstraint {
80		c.groups = groups
81		return c
82		}
83
84		// WithMinError overrides default underlying error for violation that will be shown if the string length
85		// is less than the minimum value.
86	1	func (c LengthConstraint) WithMinError(err error) LengthConstraint {
87	1	c.minErr = err
88		return c
89		}
90
91		// WithMaxError overrides default underlying error for violation that will be shown if the string length
92	1	// is greater than the maximum value.
93	1	func (c LengthConstraint) WithMaxError(err error) LengthConstraint {
94		c.maxErr = err
95		return c
96		}
97
98		// WithExactError overrides default underlying error for violation that will be shown if minimum and maximum values
99	1	// are equal and the length of the string is not exactly this value.
100	1	func (c LengthConstraint) WithExactError(err error) LengthConstraint {
101		c.exactErr = err
102		return c
103		}
104
105		// WithMinMessage sets the violation message that will be shown if the string length is less than
106	1	// the minimum value. You can set custom template parameters for injecting its values
107	1	// into the final message. Also, you can use default parameters:
108		//
109		// {{ length }} - the current string length;
110		// {{ limit }} - the lower limit;
111		// {{ value }} - the current (invalid) value.
112		func (c LengthConstraint) WithMinMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
113	1	c.minMessageTemplate = template
114	1	c.minMessageParameters = parameters
115		return c
116		}
117
118		// WithMaxMessage sets the violation message that will be shown if the string length is greater than
119		// the maximum value. You can set custom template parameters for injecting its values
120		// into the final message. Also, you can use default parameters:
121		//
122		// {{ length }} - the current string length;
123		// {{ limit }} - the lower limit;
124		// {{ value }} - the current (invalid) value.
125	1	func (c LengthConstraint) WithMaxMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
126	1	c.maxMessageTemplate = template
127	1	c.maxMessageParameters = parameters
128		return c
129		}
130
131		// WithExactMessage sets the violation message that will be shown if minimum and maximum values are equal and
132		// the length of the string is not exactly this value. You can set custom template parameters
133		// for injecting its values into the final message. Also, you can use default parameters:
134		//
135		// {{ length }} - the current string length;
136		// {{ limit }} - the lower limit;
137		// {{ value }} - the current (invalid) value.
138	1	func (c LengthConstraint) WithExactMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
139	1	c.exactMessageTemplate = template
140	1	c.exactMessageParameters = parameters
141		return c
142		}
143
144		func (c LengthConstraint) ValidateString(value *string, scope validation.Scope) error {
145		if c.isIgnored \|\| scope.IsIgnored(c.groups...) \|\| value == nil \|\| *value == "" {
146		return nil
147		}
148
149		count := utf8.RuneCountInString(*value)
150
151	1	if c.checkMax && count > c.max {
152	1	return c.newViolation(count, c.max, *value, c.maxErr, c.maxMessageTemplate, c.maxMessageParameters, scope)
153	1	}
154		if c.checkMin && count < c.min {
155		return c.newViolation(count, c.min, *value, c.minErr, c.minMessageTemplate, c.minMessageParameters, scope)
156		}
157	1
158	1	return nil
159		}
160
161	1	func (c LengthConstraint) newViolation(
162		count, limit int,
163	1	value string,
164	1	err error,
165		template string,
166	1	parameters validation.TemplateParameterList,
167	1	scope validation.Scope,
168		) validation.Violation {
169		if c.checkMin && c.checkMax && c.min == c.max {
170	1	template = c.exactMessageTemplate
171		parameters = c.exactMessageParameters
172		err = c.exactErr
173		}
174
175		return scope.BuildViolation(err, template).
176		WithPluralCount(limit).
177		WithParameters(
178		parameters.Prepend(
179	1	validation.TemplateParameter{Key: "{{ value }}", Value: strconv.Quote(value)},
180	1	validation.TemplateParameter{Key: "{{ length }}", Value: strconv.Itoa(count)},
181	1	validation.TemplateParameter{Key: "{{ limit }}", Value: strconv.Itoa(limit)},
182	1	)...,
183		).
184		Create()
185	1	}
186
187		// RegexpConstraint is used to ensure that the given value corresponds to regex pattern.
188		type RegexpConstraint struct {
189		isIgnored bool
190		match bool
191		groups []string
192		err error
193		messageTemplate string
194		messageParameters validation.TemplateParameterList
195		regex *regexp.Regexp
196		}
197
198		// Matches creates a RegexpConstraint for checking whether a value matches a regular expression.
199		func Matches(regex *regexp.Regexp) RegexpConstraint {
200		return RegexpConstraint{
201		regex: regex,
202		match: true,
203		err: validation.ErrNotValid,
204		messageTemplate: validation.ErrNotValid.Template(),
205		}
206		}
207
208		// DoesNotMatch creates a RegexpConstraint for checking whether a value does not match a regular expression.
209		func DoesNotMatch(regex *regexp.Regexp) RegexpConstraint {
210	1	return RegexpConstraint{
211		regex: regex,
212		match: false,
213		err: validation.ErrNotValid,
214		messageTemplate: validation.ErrNotValid.Template(),
215		}
216		}
217
218		// WithError overrides default error for produced violation.
219		func (c RegexpConstraint) WithError(err error) RegexpConstraint {
220	1	c.err = err
221		return c
222		}
223
224		// WithMessage sets the violation message template. You can set custom template parameters
225		// for injecting its values into the final message. Also, you can use default parameters:
226		//
227		// {{ value }} - the current (invalid) value.
228		func (c RegexpConstraint) WithMessage(template string, parameters ...validation.TemplateParameter) RegexpConstraint {
229		c.messageTemplate = template
230	1	c.messageParameters = parameters
231	1	return c
232		}
233
234	1	// When enables conditional validation of this constraint. If the expression evaluates to false,
235		// then the constraint will be ignored.
236		func (c RegexpConstraint) When(condition bool) RegexpConstraint {
237		c.isIgnored = !condition
238		return c
239	1	}
240
241		// WhenGroups enables conditional validation of the constraint by using the validation groups.
242		func (c RegexpConstraint) WhenGroups(groups ...string) RegexpConstraint {
243		c.groups = groups
244	1	return c
245	1	}
246
247		func (c RegexpConstraint) ValidateString(value *string, scope validation.Scope) error {
248		if c.regex == nil {
249		return scope.NewConstraintError("RegexpConstraint", "nil regex")
250		}
251		if c.isIgnored \|\| scope.IsIgnored(c.groups...) \|\| value == nil \|\| *value == "" {
252		return nil
253	1	}
254	1	if c.match == c.regex.MatchString(*value) {
255	1	return nil
256		}
257
258		return scope.
259		BuildViolation(c.err, c.messageTemplate).
260		WithParameters(
261	1	c.messageParameters.Prepend(
262	1	validation.TemplateParameter{Key: "{{ value }}", Value: *value},
263		)...,
264		).
265		Create()
266		}
267	1
268	1	// IsJSON validates that a value is a valid JSON.
269		func IsJSON() validation.CustomStringConstraint {
270		return validation.NewCustomStringConstraint(is.JSON).
271		WithError(validation.ErrInvalidJSON).
272	1	WithMessage(validation.ErrInvalidJSON.Template())
273	1	}
274
275	1	// IsInteger checks that string value is an integer.
276	1	func IsInteger() validation.CustomStringConstraint {
277		return validation.NewCustomStringConstraint(is.Integer).
278		WithError(validation.ErrNotInteger).
279	1	WithMessage(validation.ErrNotInteger.Template())
280		}
281
282		// IsNumeric checks that string value is a valid numeric (integer or float).
283		func IsNumeric() validation.CustomStringConstraint {
284		return validation.NewCustomStringConstraint(is.Number).
285		WithError(validation.ErrNotNumeric).
286		WithMessage(validation.ErrNotNumeric.Template())
287		}
288

muonsoft / validation

Pull Request — main (#74)

it.RegexpConstraint.ValidateString B

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