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package it |
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import ( |
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"strconv" |
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"github.com/muonsoft/validation" |
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"github.com/muonsoft/validation/code" |
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"github.com/muonsoft/validation/generic" |
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"github.com/muonsoft/validation/message" |
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) |
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// CountConstraint checks that a given collection's (array, slice or a map) length is between some minimum and |
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// maximum value. |
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type CountConstraint struct { |
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isIgnored bool |
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checkMin bool |
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checkMax bool |
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min int |
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max int |
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minMessageTemplate string |
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maxMessageTemplate string |
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exactMessageTemplate string |
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} |
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func newCountConstraint(min int, max int, checkMin bool, checkMax bool) CountConstraint { |
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1 |
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return CountConstraint{ |
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min: min, |
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max: max, |
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checkMin: checkMin, |
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checkMax: checkMax, |
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minMessageTemplate: message.CountTooFew, |
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maxMessageTemplate: message.CountTooMany, |
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exactMessageTemplate: message.CountExact, |
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} |
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} |
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func HasMinCount(min int) CountConstraint { |
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return newCountConstraint(min, 0, true, false) |
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} |
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func HasMaxCount(max int) CountConstraint { |
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return newCountConstraint(0, max, false, true) |
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} |
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func HasCountBetween(min int, max int) CountConstraint { |
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return newCountConstraint(min, max, true, true) |
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} |
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func HasExactCount(count int) CountConstraint { |
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return newCountConstraint(count, count, true, true) |
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} |
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func (c CountConstraint) When(condition bool) CountConstraint { |
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c.isIgnored = !condition |
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return c |
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} |
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func (c CountConstraint) MinMessage(message string) CountConstraint { |
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c.minMessageTemplate = message |
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return c |
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} |
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func (c CountConstraint) MaxMessage(message string) CountConstraint { |
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c.maxMessageTemplate = message |
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return c |
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} |
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func (c CountConstraint) ExactMessage(message string) CountConstraint { |
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c.exactMessageTemplate = message |
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return c |
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} |
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func (c CountConstraint) ValidateIterable(value generic.Iterable, scope validation.Scope) error { |
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return c.ValidateCountable(value.Count(), scope) |
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} |
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func (c CountConstraint) ValidateCountable(count int, scope validation.Scope) error { |
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if c.isIgnored { |
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return nil |
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} |
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if c.checkMax && count > c.max { |
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return c.newViolation(count, c.max, code.CountTooMany, c.maxMessageTemplate, scope) |
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} |
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if c.checkMin && count < c.min { |
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return c.newViolation(count, c.min, code.CountTooFew, c.minMessageTemplate, scope) |
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} |
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return nil |
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} |
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func (c CountConstraint) SetUp(scope *validation.Scope) error { |
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return nil |
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} |
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func (c CountConstraint) Name() string { |
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return "CountConstraint" |
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} |
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func (c CountConstraint) newViolation( |
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count, limit int, |
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violationCode, message string, |
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scope validation.Scope, |
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) validation.Violation { |
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if c.checkMin && c.checkMax && c.min == c.max { |
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message = c.exactMessageTemplate |
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violationCode = code.CountExact |
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} |
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return scope.BuildViolation(violationCode, message). |
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SetPluralCount(limit). |
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SetParameters(map[string]string{ |
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"{{ count }}": strconv.Itoa(count), |
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"{{ limit }}": strconv.Itoa(limit), |
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}). |
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GetViolation() |
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} |
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muonsoft /
validation
