it.CountConstraint.WithExactError - Code Metrics - Inspection of "Merge pull request #74 from muonsoft/next" - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

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by Igor

created 2022-07-10 17:33 UTC

it.CountConstraint.WithExactError A

↳ Parent: it/iterable.go

Complexity

Conditions

Size

Total Lines	3
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	1
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	3
dl	0
loc	3
ccs	1
cts	1
cp	1
crap	1
rs	10
c	0
b	0
f	0
nop	1

package it

import (
	"context"
	"strconv"

	"github.com/muonsoft/validation"
)

// CountConstraint checks that a given collection's (array, slice or a map) length is between some minimum and
// maximum value.
type CountConstraint 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 newCountConstraint(min int, max int, checkMin bool, checkMax bool) CountConstraint {
	return CountConstraint{
		min:                  min,
		max:                  max,
		checkMin:             checkMin,
		checkMax:             checkMax,
		minErr:               validation.ErrTooFewElements,
		maxErr:               validation.ErrTooManyElements,
		exactErr:             validation.ErrNotExactCount,
		minMessageTemplate:   validation.ErrTooFewElements.Message(),
		maxMessageTemplate:   validation.ErrTooManyElements.Message(),
		exactMessageTemplate: validation.ErrNotExactCount.Message(),
	}
}

// HasMinCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
// is greater than the minimum value.
func HasMinCount(min int) CountConstraint {
	return newCountConstraint(min, 0, true, false)
}

// HasMaxCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
// is less than the maximum value.
func HasMaxCount(max int) CountConstraint {
	return newCountConstraint(0, max, false, true)
}

// HasCountBetween creates a CountConstraint that checks the length of the iterable (slice, array, or map)
// is between some minimum and maximum value.
func HasCountBetween(min int, max int) CountConstraint {
	return newCountConstraint(min, max, true, true)
}

// HasExactCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
// has exact value.
func HasExactCount(count int) CountConstraint {
	return newCountConstraint(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 CountConstraint) When(condition bool) CountConstraint {
	c.isIgnored = !condition
	return c
}

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

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

// WithMaxError overrides default underlying error for violation that will be shown if the
// collection length is greater than the maximum value.
func (c CountConstraint) WithMaxError(err error) CountConstraint {
	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 collection is not exactly this value.
func (c CountConstraint) WithExactError(err error) CountConstraint {
	c.exactErr = err
	return c
}

// WithMinMessage sets the violation message that will be shown if the collection 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:
//
//	{{ count }} - the current collection size;
//	{{ limit }} - the lower limit.
func (c CountConstraint) WithMinMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
	c.minMessageTemplate = template
	c.minMessageParameters = parameters
	return c
}

// WithMaxMessage sets the violation message that will be shown if the collection 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:
//
//	{{ count }} - the current collection size;
//	{{ limit }} - the upper limit.
func (c CountConstraint) WithMaxMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
	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 collection 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:
//
//	{{ count }} - the current collection size;
//	{{ limit }} - the exact expected collection size.
func (c CountConstraint) WithExactMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
	c.exactMessageTemplate = template
	c.exactMessageParameters = parameters
	return c
}

func (c CountConstraint) ValidateCountable(ctx context.Context, validator *validation.Validator, count int) error {
	if c.isIgnored || validator.IsIgnoredForGroups(c.groups...) {
		return nil
	}
	if c.checkMax && count > c.max {
		return c.newViolation(ctx, validator, count, c.max, c.maxErr, c.maxMessageTemplate, c.maxMessageParameters)
	}
	if c.checkMin && count < c.min {
		return c.newViolation(ctx, validator, count, c.min, c.minErr, c.minMessageTemplate, c.minMessageParameters)
	}

	return nil
}

func (c CountConstraint) newViolation(
	ctx context.Context,
	validator *validation.Validator,
	count, limit int,
	err error,
	template string,
	parameters validation.TemplateParameterList,
) validation.Violation {
	if c.checkMin && c.checkMax && c.min == c.max {
		template = c.exactMessageTemplate
		parameters = c.exactMessageParameters
		err = c.exactErr
	}

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


1		package it
2
3		import (
4		"context"
5		"strconv"
6
7		"github.com/muonsoft/validation"
8		)
9
10		// CountConstraint checks that a given collection's (array, slice or a map) length is between some minimum and
11		// maximum value.
12		type CountConstraint struct {
13		isIgnored bool
14		checkMin bool
15		checkMax bool
16		min int
17		max int
18		groups []string
19		minErr error
20		maxErr error
21		exactErr error
22		minMessageTemplate string
23		minMessageParameters validation.TemplateParameterList
24		maxMessageTemplate string
25		maxMessageParameters validation.TemplateParameterList
26		exactMessageTemplate string
27		exactMessageParameters validation.TemplateParameterList
28		}
29
30		func newCountConstraint(min int, max int, checkMin bool, checkMax bool) CountConstraint {
31		return CountConstraint{
32		min: min,
33	1	max: max,
34		checkMin: checkMin,
35		checkMax: checkMax,
36		minErr: validation.ErrTooFewElements,
37		maxErr: validation.ErrTooManyElements,
38		exactErr: validation.ErrNotExactCount,
39		minMessageTemplate: validation.ErrTooFewElements.Message(),
40		maxMessageTemplate: validation.ErrTooManyElements.Message(),
41		exactMessageTemplate: validation.ErrNotExactCount.Message(),
42		}
43		}
44
45		// HasMinCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
46		// is greater than the minimum value.
47		func HasMinCount(min int) CountConstraint {
48		return newCountConstraint(min, 0, true, false)
49		}
50	1
51		// HasMaxCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
52		// is less than the maximum value.
53		func HasMaxCount(max int) CountConstraint {
54		return newCountConstraint(0, max, false, true)
55		}
56	1
57		// HasCountBetween creates a CountConstraint that checks the length of the iterable (slice, array, or map)
58		// is between some minimum and maximum value.
59		func HasCountBetween(min int, max int) CountConstraint {
60		return newCountConstraint(min, max, true, true)
61		}
62	1
63		// HasExactCount creates a CountConstraint that checks the length of the iterable (slice, array, or map)
64		// has exact value.
65		func HasExactCount(count int) CountConstraint {
66		return newCountConstraint(count, count, true, true)
67		}
68	1
69		// When enables conditional validation of this constraint. If the expression evaluates to false,
70		// then the constraint will be ignored.
71		func (c CountConstraint) When(condition bool) CountConstraint {
72		c.isIgnored = !condition
73	1	return c
74		}
75
76		// WhenGroups enables conditional validation of the constraint by using the validation groups.
77		func (c CountConstraint) WhenGroups(groups ...string) CountConstraint {
78		c.groups = groups
79		return c
80		}
81
82		// WithMinError overrides default underlying error for violation that will be shown if the
83		// collection length is less than the minimum value.
84	1	func (c CountConstraint) WithMinError(err error) CountConstraint {
85	1	c.minErr = err
86		return c
87		}
88
89		// WithMaxError overrides default underlying error for violation that will be shown if the
90	1	// collection length is greater than the maximum value.
91	1	func (c CountConstraint) WithMaxError(err error) CountConstraint {
92		c.maxErr = err
93		return c
94		}
95
96		// WithExactError overrides default underlying error for violation that will be shown if minimum and
97	1	// maximum values are equal and the length of the collection is not exactly this value.
98	1	func (c CountConstraint) WithExactError(err error) CountConstraint {
99		c.exactErr = err
100		return c
101		}
102
103		// WithMinMessage sets the violation message that will be shown if the collection length is less than
104	1	// the minimum value. You can set custom template parameters for injecting its values
105	1	// into the final message. Also, you can use default parameters:
106		//
107		// {{ count }} - the current collection size;
108		// {{ limit }} - the lower limit.
109		func (c CountConstraint) WithMinMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
110		c.minMessageTemplate = template
111	1	c.minMessageParameters = parameters
112	1	return c
113		}
114
115		// WithMaxMessage sets the violation message that will be shown if the collection length is greater than
116		// the maximum value. You can set custom template parameters for injecting its values
117		// into the final message. Also, you can use default parameters:
118		//
119		// {{ count }} - the current collection size;
120		// {{ limit }} - the upper limit.
121		func (c CountConstraint) WithMaxMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
122	1	c.maxMessageTemplate = template
123	1	c.maxMessageParameters = parameters
124	1	return c
125		}
126
127		// WithExactMessage sets the violation message that will be shown if minimum and maximum values are equal and
128		// the length of the collection is not exactly this value. You can set custom template parameters
129		// for injecting its values into the final message. Also, you can use default parameters:
130		//
131		// {{ count }} - the current collection size;
132		// {{ limit }} - the exact expected collection size.
133		func (c CountConstraint) WithExactMessage(template string, parameters ...validation.TemplateParameter) CountConstraint {
134	1	c.exactMessageTemplate = template
135	1	c.exactMessageParameters = parameters
136	1	return c
137		}
138
139		func (c CountConstraint) ValidateCountable(ctx context.Context, validator *validation.Validator, count int) error {
140		if c.isIgnored \|\| validator.IsIgnoredForGroups(c.groups...) {
141		return nil
142		}
143		if c.checkMax && count > c.max {
144		return c.newViolation(ctx, validator, count, c.max, c.maxErr, c.maxMessageTemplate, c.maxMessageParameters)
145		}
146	1	if c.checkMin && count < c.min {
147	1	return c.newViolation(ctx, validator, count, c.min, c.minErr, c.minMessageTemplate, c.minMessageParameters)
148	1	}
149
150		return nil
151		}
152	1
153		func (c CountConstraint) newViolation(
154		ctx context.Context,
155		validator *validation.Validator,
156	1	count, limit int,
157	1	err error,
158		template string,
159	1	parameters validation.TemplateParameterList,
160	1	) validation.Violation {
161		if c.checkMin && c.checkMax && c.min == c.max {
162	1	template = c.exactMessageTemplate
163	1	parameters = c.exactMessageParameters
164		err = c.exactErr
165		}
166	1
167		return validator.BuildViolation(ctx, err, template).
168		WithPluralCount(limit).
169		WithParameters(
170		parameters.Prepend(
171		validation.TemplateParameter{Key: "{{ count }}", Value: strconv.Itoa(count)},
172		validation.TemplateParameter{Key: "{{ limit }}", Value: strconv.Itoa(limit)},
173		)...,
174		).
175	1	Create()
176		}
177

muonsoft / validation

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it.CountConstraint.WithExactError A

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