it.LengthConstraint.ValidateString - Code Metrics - Inspection of "validation groups" - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — main (#68)

by Igor

created 2022-01-27 17:51 UTC

it.LengthConstraint.ValidateString C

↳ Parent: it/string.go

Complexity

Conditions

Size

Total Lines	15
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	9

Importance

Changes

Metric	Value
cc	9
eloc	9
nop	2
dl	0
loc	15
ccs	8
cts	8
cp	1
crap	9
rs	6.6666
c	0
b	0
f	0

package it

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

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

// 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
	minCode                string
	maxCode                string
	exactCode              string
	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,
		minCode:              code.LengthTooFew,
		maxCode:              code.LengthTooMany,
		exactCode:            code.LengthExact,
		minMessageTemplate:   message.Templates[code.LengthTooFew],
		maxMessageTemplate:   message.Templates[code.LengthTooMany],
		exactMessageTemplate: message.Templates[code.LengthExact],
	}
}

// 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)
}

// SetUp always returns no error.
func (c LengthConstraint) SetUp() error {
	return nil
}

// Name is the constraint name.
func (c LengthConstraint) Name() string {
	return "LengthConstraint"
}

// 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
}

// MinCode overrides default code for violation that will be shown if the string length
// is less than the minimum value.
func (c LengthConstraint) MinCode(code string) LengthConstraint {
	c.minCode = code
	return c
}

// MaxCode overrides default code for violation that will be shown if the string length
// is greater than the maximum value.
func (c LengthConstraint) MaxCode(code string) LengthConstraint {
	c.maxCode = code
	return c
}

// ExactCode overrides default code 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) ExactCode(code string) LengthConstraint {
	c.exactCode = code
	return c
}

// MinMessage 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) MinMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
	c.minMessageTemplate = template
	c.minMessageParameters = parameters
	return c
}

// MaxMessage 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) MaxMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
	c.maxMessageTemplate = template
	c.maxMessageParameters = parameters
	return c
}

// ExactMessage 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) ExactMessage(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.maxCode, c.maxMessageTemplate, c.maxMessageParameters, scope)
	}
	if c.checkMin && count < c.min {
		return c.newViolation(count, c.min, *value, c.minCode, c.minMessageTemplate, c.minMessageParameters, scope)
	}

	return nil
}

func (c LengthConstraint) newViolation(
	count, limit int,
	value, violationCode, 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
		violationCode = c.exactCode
	}

	return scope.BuildViolation(violationCode, template).
		SetPluralCount(limit).
		SetParameters(
			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)},
			)...,
		).
		CreateViolation()
}

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

// Matches creates a RegexConstraint for checking whether a value matches a regular expression.
func Matches(regex *regexp.Regexp) RegexConstraint {
	return RegexConstraint{
		regex:           regex,
		match:           true,
		code:            code.MatchingFailed,
		messageTemplate: message.Templates[code.NotValid],
	}
}

// DoesNotMatch creates a RegexConstraint for checking whether a value does not match a regular expression.
func DoesNotMatch(regex *regexp.Regexp) RegexConstraint {
	return RegexConstraint{
		regex:           regex,
		match:           false,
		code:            code.MatchingFailed,
		messageTemplate: message.Templates[code.NotValid],
	}
}

// SetUp will return an error if the pattern is empty.
func (c RegexConstraint) SetUp() error {
	if c.regex == nil {
		return errEmptyRegex
	}

	return nil
}

// Name is the constraint name.
func (c RegexConstraint) Name() string {
	return "RegexConstraint"
}

// Code overrides default code for produced violation.
func (c RegexConstraint) Code(code string) RegexConstraint {
	c.code = code
	return c
}

// Message 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 RegexConstraint) Message(template string, parameters ...validation.TemplateParameter) RegexConstraint {
	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 RegexConstraint) When(condition bool) RegexConstraint {
	c.isIgnored = !condition
	return c
}

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

func (c RegexConstraint) ValidateString(value *string, scope validation.Scope) error {
	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.code, c.messageTemplate).
		SetParameters(
			c.messageParameters.Prepend(
				validation.TemplateParameter{Key: "{{ value }}", Value: *value},
			)...,
		).
		CreateViolation()
}

// IsJSON validates that a value is a valid JSON.
func IsJSON() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.JSON,
		"JSONConstraint",
		code.InvalidJSON,
		message.Templates[code.InvalidJSON],
	)
}


1		package it
2
3		import (
4		"regexp"
5		"strconv"
6		"unicode/utf8"
7
8		"github.com/muonsoft/validation"
9		"github.com/muonsoft/validation/code"
10		"github.com/muonsoft/validation/is"
11		"github.com/muonsoft/validation/message"
12		)
13
14		// LengthConstraint checks that a given string length is between some minimum and maximum value.
15		// If you want to check the length of the array, slice or a map use CountConstraint.
16		type LengthConstraint struct {
17		isIgnored bool
18		checkMin bool
19		checkMax bool
20		min int
21		max int
22		groups []string
23		minCode string
24		maxCode string
25		exactCode string
26		minMessageTemplate string
27		minMessageParameters validation.TemplateParameterList
28		maxMessageTemplate string
29		maxMessageParameters validation.TemplateParameterList
30		exactMessageTemplate string
31		exactMessageParameters validation.TemplateParameterList
32		}
33
34		func newLengthConstraint(min int, max int, checkMin bool, checkMax bool) LengthConstraint {
35	1	return LengthConstraint{
36		min: min,
37		max: max,
38		checkMin: checkMin,
39		checkMax: checkMax,
40		minCode: code.LengthTooFew,
41		maxCode: code.LengthTooMany,
42		exactCode: code.LengthExact,
43		minMessageTemplate: message.Templates[code.LengthTooFew],
44		maxMessageTemplate: message.Templates[code.LengthTooMany],
45		exactMessageTemplate: message.Templates[code.LengthExact],
46		}
47		}
48
49		// HasMinLength creates a LengthConstraint that checks the length of the string
50		// is greater than the minimum value.
51		func HasMinLength(min int) LengthConstraint {
52	1	return newLengthConstraint(min, 0, true, false)
53		}
54
55		// HasMaxLength creates a LengthConstraint that checks the length of the string
56		// is less than the maximum value.
57		func HasMaxLength(max int) LengthConstraint {
58	1	return newLengthConstraint(0, max, false, true)
59		}
60
61		// HasLengthBetween creates a LengthConstraint that checks the length of the string
62		// is between some minimum and maximum value.
63		func HasLengthBetween(min int, max int) LengthConstraint {
64	1	return newLengthConstraint(min, max, true, true)
65		}
66
67		// HasExactLength creates a LengthConstraint that checks the length of the string
68		// has exact value.
69		func HasExactLength(count int) LengthConstraint {
70	1	return newLengthConstraint(count, count, true, true)
71		}
72
73		// SetUp always returns no error.
74		func (c LengthConstraint) SetUp() error {
75	1	return nil
76		}
77
78		// Name is the constraint name.
79		func (c LengthConstraint) Name() string {
80		return "LengthConstraint"
81		}
82
83		// When enables conditional validation of this constraint. If the expression evaluates to false,
84		// then the constraint will be ignored.
85		func (c LengthConstraint) When(condition bool) LengthConstraint {
86	1	c.isIgnored = !condition
87	1	return c
88		}
89
90		// WhenGroups enables conditional validation of the constraint by using the validation groups.
91		func (c LengthConstraint) WhenGroups(groups ...string) LengthConstraint {
92	1	c.groups = groups
93	1	return c
94		}
95
96		// MinCode overrides default code for violation that will be shown if the string length
97		// is less than the minimum value.
98		func (c LengthConstraint) MinCode(code string) LengthConstraint {
99	1	c.minCode = code
100	1	return c
101		}
102
103		// MaxCode overrides default code for violation that will be shown if the string length
104		// is greater than the maximum value.
105		func (c LengthConstraint) MaxCode(code string) LengthConstraint {
106	1	c.maxCode = code
107	1	return c
108		}
109
110		// ExactCode overrides default code for violation that will be shown if minimum and maximum values
111		// are equal and the length of the string is not exactly this value.
112		func (c LengthConstraint) ExactCode(code string) LengthConstraint {
113	1	c.exactCode = code
114	1	return c
115		}
116
117		// MinMessage sets the violation message that will be shown if the string length is less than
118		// the minimum value. You can set custom template parameters for injecting its values
119		// into the final message. Also, you can use default parameters:
120		//
121		// {{ length }} - the current string length;
122		// {{ limit }} - the lower limit;
123		// {{ value }} - the current (invalid) value.
124		func (c LengthConstraint) MinMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
125	1	c.minMessageTemplate = template
126	1	c.minMessageParameters = parameters
127	1	return c
128		}
129
130		// MaxMessage sets the violation message that will be shown if the string length is greater than
131		// the maximum value. You can set custom template parameters for injecting its values
132		// into the final message. Also, you can use default parameters:
133		//
134		// {{ length }} - the current string length;
135		// {{ limit }} - the lower limit;
136		// {{ value }} - the current (invalid) value.
137		func (c LengthConstraint) MaxMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
138	1	c.maxMessageTemplate = template
139	1	c.maxMessageParameters = parameters
140	1	return c
141		}
142
143		// ExactMessage sets the violation message that will be shown if minimum and maximum values are equal and
144		// the length of the string is not exactly this value. You can set custom template parameters
145		// for injecting its values into the final message. Also, you can use default parameters:
146		//
147		// {{ length }} - the current string length;
148		// {{ limit }} - the lower limit;
149		// {{ value }} - the current (invalid) value.
150		func (c LengthConstraint) ExactMessage(template string, parameters ...validation.TemplateParameter) LengthConstraint {
151	1	c.exactMessageTemplate = template
152	1	c.exactMessageParameters = parameters
153	1	return c
154		}
155
156		func (c LengthConstraint) ValidateString(value *string, scope validation.Scope) error {
157	1	if c.isIgnored \|\| scope.IsIgnored(c.groups...) \|\| value == nil \|\| *value == "" {
158	1	return nil
159		}
160
161	1	count := utf8.RuneCountInString(*value)
162
163	1	if c.checkMax && count > c.max {
164	1	return c.newViolation(count, c.max, *value, c.maxCode, c.maxMessageTemplate, c.maxMessageParameters, scope)
165		}
166	1	if c.checkMin && count < c.min {
167	1	return c.newViolation(count, c.min, *value, c.minCode, c.minMessageTemplate, c.minMessageParameters, scope)
168		}
169
170	1	return nil
171		}
172
173		func (c LengthConstraint) newViolation(
174		count, limit int,
175		value, violationCode, template string,
176		parameters validation.TemplateParameterList,
177		scope validation.Scope,
178		) validation.Violation {
179	1	if c.checkMin && c.checkMax && c.min == c.max {
180	1	template = c.exactMessageTemplate
181	1	parameters = c.exactMessageParameters
182	1	violationCode = c.exactCode
183		}
184
185	1	return scope.BuildViolation(violationCode, template).
186		SetPluralCount(limit).
187		SetParameters(
188		parameters.Prepend(
189		validation.TemplateParameter{Key: "{{ value }}", Value: strconv.Quote(value)},
190		validation.TemplateParameter{Key: "{{ length }}", Value: strconv.Itoa(count)},
191		validation.TemplateParameter{Key: "{{ limit }}", Value: strconv.Itoa(limit)},
192		)...,
193		).
194		CreateViolation()
195		}
196
197		// RegexConstraint is used to ensure that the given value corresponds to regex pattern.
198		type RegexConstraint struct {
199		isIgnored bool
200		match bool
201		groups []string
202		code string
203		messageTemplate string
204		messageParameters validation.TemplateParameterList
205		regex *regexp.Regexp
206		}
207
208		// Matches creates a RegexConstraint for checking whether a value matches a regular expression.
209		func Matches(regex *regexp.Regexp) RegexConstraint {
210	1	return RegexConstraint{
211		regex: regex,
212		match: true,
213		code: code.MatchingFailed,
214		messageTemplate: message.Templates[code.NotValid],
215		}
216		}
217
218		// DoesNotMatch creates a RegexConstraint for checking whether a value does not match a regular expression.
219		func DoesNotMatch(regex *regexp.Regexp) RegexConstraint {
220	1	return RegexConstraint{
221		regex: regex,
222		match: false,
223		code: code.MatchingFailed,
224		messageTemplate: message.Templates[code.NotValid],
225		}
226		}
227
228		// SetUp will return an error if the pattern is empty.
229		func (c RegexConstraint) SetUp() error {
230	1	if c.regex == nil {
231	1	return errEmptyRegex
232		}
233
234	1	return nil
235		}
236
237		// Name is the constraint name.
238		func (c RegexConstraint) Name() string {
239	1	return "RegexConstraint"
240		}
241
242		// Code overrides default code for produced violation.
243		func (c RegexConstraint) Code(code string) RegexConstraint {
244	1	c.code = code
245	1	return c
246		}
247
248		// Message sets the violation message template. You can set custom template parameters
249		// for injecting its values into the final message. Also, you can use default parameters:
250		//
251		// {{ value }} - the current (invalid) value.
252		func (c RegexConstraint) Message(template string, parameters ...validation.TemplateParameter) RegexConstraint {
253	1	c.messageTemplate = template
254	1	c.messageParameters = parameters
255	1	return c
256		}
257
258		// When enables conditional validation of this constraint. If the expression evaluates to false,
259		// then the constraint will be ignored.
260		func (c RegexConstraint) When(condition bool) RegexConstraint {
261	1	c.isIgnored = !condition
262	1	return c
263		}
264
265		// WhenGroups enables conditional validation of the constraint by using the validation groups.
266		func (c RegexConstraint) WhenGroups(groups ...string) RegexConstraint {
267	1	c.groups = groups
268	1	return c
269		}
270
271		func (c RegexConstraint) ValidateString(value *string, scope validation.Scope) error {
272	1	if c.isIgnored \|\| scope.IsIgnored(c.groups...) \|\| value == nil \|\| *value == "" {
273	1	return nil
274		}
275	1	if c.match == c.regex.MatchString(*value) {
276	1	return nil
277		}
278
279	1	return scope.
280		BuildViolation(c.code, c.messageTemplate).
281		SetParameters(
282		c.messageParameters.Prepend(
283		validation.TemplateParameter{Key: "{{ value }}", Value: *value},
284		)...,
285		).
286		CreateViolation()
287		}
288
289		// IsJSON validates that a value is a valid JSON.
290		func IsJSON() validation.CustomStringConstraint {
291	1	return validation.NewCustomStringConstraint(
292		is.JSON,
293		"JSONConstraint",
294		code.InvalidJSON,
295		message.Templates[code.InvalidJSON],
296		)
297		}
298

muonsoft / validation

Pull Request — main (#68)

it.LengthConstraint.ValidateString C

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Size

Duplication

Code Coverage

Importance

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