it.URLConstraint.ValidateString - Code Metrics - Inspection of "custom-codes" - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — main (#50)

by Igor

created 2021-05-21 19:27 UTC

it.URLConstraint.ValidateString B

↳ Parent: it/web.go

Complexity

Conditions

Size

Total Lines	20
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	6

Importance

Changes

Metric	Value
cc	6
eloc	13
nop	2
dl	0
loc	20
ccs	8
cts	8
cp	1
crap	6
rs	8.6666
c	0
b	0
f	0

package it

import (
	"errors"
	"net"

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

// IsEmail is used for simplified validation of an email address. It allows all values
// with an "@" symbol in, and a "." in the second host part of the email address.
func IsEmail() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.Email,
		"EmailConstraint",
		code.InvalidEmail,
		message.InvalidEmail,
	)
}

// IsHTML5Email is used for validation of an email address based on pattern for HTML5
// (see https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address).
func IsHTML5Email() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.HTML5Email,
		"HTML5EmailConstraint",
		code.InvalidEmail,
		message.InvalidEmail,
	)
}

// IsHostname validates that a value is a valid hostname. It checks that:
//	• each label within a valid hostname may be no more than 63 octets long;
//	• the total length of the hostname must not exceed 255 characters;
//	• hostname is fully qualified and include its top-level domain name
//	  (for instance, example.com is valid but example is not);
//	• checks for reserved top-level domains according to RFC 2606
//	  (hostnames containing them are not considered valid:
//	  .example, .invalid, .localhost, and .test).
//
// If you do not want to check for top-level domains use IsLooseHostname version of constraint.
func IsHostname() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.StrictHostname,
		"HostnameConstraint",
		code.InvalidHostname,
		message.InvalidHostname,
	)
}

// IsLooseHostname validates that a value is a valid hostname. It checks that:
//	• each label within a valid hostname may be no more than 63 octets long;
//	• the total length of the hostname must not exceed 255 characters.
func IsLooseHostname() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.Hostname,
		"LooseHostnameConstraint",
		code.InvalidHostname,
		message.InvalidHostname,
	)
}

// URLConstraint is used to validate URL string. This constraint doesn’t check that the host of the
// given URL really exists, because the information of the DNS records is not reliable.
//
// This constraint doesn't check the length of the URL. Use LengthConstraint to check the length of the given value.
type URLConstraint struct {
	isIgnored              bool
	supportsRelativeSchema bool
	schemas                []string
	code                   string
	messageTemplate        string
	messageParameters      validation.TemplateParameterList
}

// IsURL creates a URLConstraint to validate an URL. By default, constraint checks
// only for the http:// and https:// schemas. Use the WithSchemas method to configure
// the list of expected schemas. Also, you can use WithRelativeSchema to enable support
// of the relative schema (without schema, e.g. "//example.com").
func IsURL() URLConstraint {
	return URLConstraint{
		schemas:         []string{"http", "https"},
		code:            code.InvalidURL,
		messageTemplate: message.InvalidURL,
	}
}

// SetUp will return an error if the list of schemas is empty.
func (c URLConstraint) SetUp() error {
	if len(c.schemas) == 0 {
		return errEmptySchemas
	}

	return nil
}

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

// WithRelativeSchema enables support of relative URL schema, which means that URL value
// may be treated as relative (without schema, e.g. "//example.com").
func (c URLConstraint) WithRelativeSchema() URLConstraint {
	c.supportsRelativeSchema = true
	return c
}

// WithSchemas is used to set up a list of accepted schemas. For example, if you also consider the ftp:// type URLs
// to be valid, redefine the schemas list, listing http, https, and also ftp.
// If the list is empty, then an error will be returned by the SetUp method.
func (c URLConstraint) WithSchemas(schemas ...string) URLConstraint {
	c.schemas = schemas
	return c
}

// Code overrides default code for produced violation.
func (c URLConstraint) Code(code string) URLConstraint {
	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 URLConstraint) Message(template string, parameters ...validation.TemplateParameter) URLConstraint {
	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 URLConstraint) When(condition bool) URLConstraint {
	c.isIgnored = !condition
	return c
}

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

	schemas := c.schemas
	if c.supportsRelativeSchema {
		schemas = append(schemas, "")
	}
	if is.URL(*value, schemas...) {
		return nil
	}

	return scope.BuildViolation(c.code, c.messageTemplate).
		SetParameters(
			c.messageParameters.Prepend(
				validation.TemplateParameter{Key: "{{ value }}", Value: *value},
			)...,
		).
		CreateViolation()
}

// IPConstraint is used to validate IP address. You can check for different versions
// and restrict some ranges by additional options.
type IPConstraint struct {
	isIgnored    bool
	validate     func(value string, restrictions ...validate.IPRestriction) error
	restrictions []validate.IPRestriction

	invalidCode    string
	prohibitedCode string

	invalidMessageTemplate      string
	invalidMessageParameters    validation.TemplateParameterList
	prohibitedMessageTemplate   string
	prohibitedMessageParameters validation.TemplateParameterList
}

// IsIP creates an IPConstraint to validate an IP address (IPv4 or IPv6).
func IsIP() IPConstraint {
	return newIPConstraint(validate.IP)
}

// IsIPv4 creates an IPConstraint to validate an IPv4 address.
func IsIPv4() IPConstraint {
	return newIPConstraint(validate.IPv4)
}

// IsIPv6 creates an IPConstraint to validate an IPv4 address.
func IsIPv6() IPConstraint {
	return newIPConstraint(validate.IPv6)
}

func newIPConstraint(validate func(value string, restrictions ...validate.IPRestriction) error) IPConstraint {
	return IPConstraint{
		validate:                  validate,
		invalidCode:               code.InvalidIP,
		prohibitedCode:            code.ProhibitedIP,
		invalidMessageTemplate:    message.InvalidIP,
		prohibitedMessageTemplate: message.ProhibitedIP,
	}
}

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

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

// DenyPrivateIP denies using of private IPs according to RFC 1918 (IPv4 addresses)
// and RFC 4193 (IPv6 addresses).
func (c IPConstraint) DenyPrivateIP() IPConstraint {
	c.restrictions = append(c.restrictions, validate.DenyPrivateIP())
	return c
}

// DenyIP can be used to deny custom range of IP addresses.
func (c IPConstraint) DenyIP(restrict func(ip net.IP) bool) IPConstraint {
	c.restrictions = append(c.restrictions, restrict)
	return c
}

// Codes overrides default codes for produced violation.
func (c IPConstraint) Codes(invalidCode, prohibitedCode string) IPConstraint {
	c.invalidCode = invalidCode
	c.prohibitedCode = prohibitedCode
	return c
}

// InvalidMessage sets the violation message template for invalid IP case.
// 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 IPConstraint) InvalidMessage(template string, parameters ...validation.TemplateParameter) IPConstraint {
	c.invalidMessageTemplate = template
	c.invalidMessageParameters = parameters
	return c
}

// ProhibitedMessage sets the violation message template for prohibited IP case.
// 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 IPConstraint) ProhibitedMessage(template string, parameters ...validation.TemplateParameter) IPConstraint {
	c.prohibitedMessageTemplate = template
	c.prohibitedMessageParameters = parameters
	return c
}

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

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

	return c.validateIP(*value, scope)
}

func (c IPConstraint) validateIP(value string, scope validation.Scope) error {
	err := c.validate(value, c.restrictions...)
	if err == nil {
		return nil
	}

	var builder *validation.ViolationBuilder
	var parameters validation.TemplateParameterList

	if errors.Is(err, validate.ErrProhibited) {
		builder = scope.BuildViolation(c.prohibitedCode, c.prohibitedMessageTemplate)
		parameters = c.prohibitedMessageParameters
	} else {
		builder = scope.BuildViolation(c.invalidCode, c.invalidMessageTemplate)
		parameters = c.invalidMessageParameters
	}

	return builder.
		SetParameters(
			parameters.Prepend(
				validation.TemplateParameter{Key: "{{ value }}", Value: value},
			)...,
		).
		CreateViolation()
}


1		package it
2
3		import (
4		"errors"
5		"net"
6
7		"github.com/muonsoft/validation"
8		"github.com/muonsoft/validation/code"
9		"github.com/muonsoft/validation/is"
10		"github.com/muonsoft/validation/message"
11		"github.com/muonsoft/validation/validate"
12		)
13
14		// IsEmail is used for simplified validation of an email address. It allows all values
15		// with an "@" symbol in, and a "." in the second host part of the email address.
16		func IsEmail() validation.CustomStringConstraint {
17	1	return validation.NewCustomStringConstraint(
18		is.Email,
19		"EmailConstraint",
20		code.InvalidEmail,
21		message.InvalidEmail,
22		)
23		}
24
25		// IsHTML5Email is used for validation of an email address based on pattern for HTML5
26		// (see https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address).
27		func IsHTML5Email() validation.CustomStringConstraint {
28	1	return validation.NewCustomStringConstraint(
29		is.HTML5Email,
30		"HTML5EmailConstraint",
31		code.InvalidEmail,
32		message.InvalidEmail,
33		)
34		}
35
36		// IsHostname validates that a value is a valid hostname. It checks that:
37		// • each label within a valid hostname may be no more than 63 octets long;
38		// • the total length of the hostname must not exceed 255 characters;
39		// • hostname is fully qualified and include its top-level domain name
40		// (for instance, example.com is valid but example is not);
41		// • checks for reserved top-level domains according to RFC 2606
42		// (hostnames containing them are not considered valid:
43		// .example, .invalid, .localhost, and .test).
44		//
45		// If you do not want to check for top-level domains use IsLooseHostname version of constraint.
46		func IsHostname() validation.CustomStringConstraint {
47	1	return validation.NewCustomStringConstraint(
48		is.StrictHostname,
49		"HostnameConstraint",
50		code.InvalidHostname,
51		message.InvalidHostname,
52		)
53		}
54
55		// IsLooseHostname validates that a value is a valid hostname. It checks that:
56		// • each label within a valid hostname may be no more than 63 octets long;
57		// • the total length of the hostname must not exceed 255 characters.
58		func IsLooseHostname() validation.CustomStringConstraint {
59	1	return validation.NewCustomStringConstraint(
60		is.Hostname,
61		"LooseHostnameConstraint",
62		code.InvalidHostname,
63		message.InvalidHostname,
64		)
65		}
66
67		// URLConstraint is used to validate URL string. This constraint doesn’t check that the host of the
68		// given URL really exists, because the information of the DNS records is not reliable.
69		//
70		// This constraint doesn't check the length of the URL. Use LengthConstraint to check the length of the given value.
71		type URLConstraint struct {
72		isIgnored bool
73		supportsRelativeSchema bool
74		schemas []string
75		code string
76		messageTemplate string
77		messageParameters validation.TemplateParameterList
78		}
79
80		// IsURL creates a URLConstraint to validate an URL. By default, constraint checks
81		// only for the http:// and https:// schemas. Use the WithSchemas method to configure
82		// the list of expected schemas. Also, you can use WithRelativeSchema to enable support
83		// of the relative schema (without schema, e.g. "//example.com").
84		func IsURL() URLConstraint {
85	1	return URLConstraint{
86		schemas: []string{"http", "https"},
87		code: code.InvalidURL,
88		messageTemplate: message.InvalidURL,
89		}
90		}
91
92		// SetUp will return an error if the list of schemas is empty.
93		func (c URLConstraint) SetUp() error {
94	1	if len(c.schemas) == 0 {
95	1	return errEmptySchemas
96		}
97
98	1	return nil
99		}
100
101		// Name is the constraint name.
102		func (c URLConstraint) Name() string {
103	1	return "URLConstraint"
104		}
105
106		// WithRelativeSchema enables support of relative URL schema, which means that URL value
107		// may be treated as relative (without schema, e.g. "//example.com").
108		func (c URLConstraint) WithRelativeSchema() URLConstraint {
109	1	c.supportsRelativeSchema = true
110	1	return c
111		}
112
113		// WithSchemas is used to set up a list of accepted schemas. For example, if you also consider the ftp:// type URLs
114		// to be valid, redefine the schemas list, listing http, https, and also ftp.
115		// If the list is empty, then an error will be returned by the SetUp method.
116		func (c URLConstraint) WithSchemas(schemas ...string) URLConstraint {
117	1	c.schemas = schemas
118	1	return c
119		}
120
121		// Code overrides default code for produced violation.
122		func (c URLConstraint) Code(code string) URLConstraint {
123	1	c.code = code
124	1	return c
125		}
126
127		// Message sets the violation message template. You can set custom template parameters
128		// for injecting its values into the final message. Also, you can use default parameters:
129		//
130		// {{ value }} - the current (invalid) value.
131		func (c URLConstraint) Message(template string, parameters ...validation.TemplateParameter) URLConstraint {
132	1	c.messageTemplate = template
133	1	c.messageParameters = parameters
134	1	return c
135		}
136
137		// When enables conditional validation of this constraint. If the expression evaluates to false,
138		// then the constraint will be ignored.
139		func (c URLConstraint) When(condition bool) URLConstraint {
140	1	c.isIgnored = !condition
141	1	return c
142		}
143
144		func (c URLConstraint) ValidateString(value *string, scope validation.Scope) error {
145	1	if c.isIgnored \|\| value == nil \|\| *value == "" {
146	1	return nil
147		}
148
149	1	schemas := c.schemas
150	1	if c.supportsRelativeSchema {
151	1	schemas = append(schemas, "")
152		}
153	1	if is.URL(*value, schemas...) {
154	1	return nil
155		}
156
157	1	return scope.BuildViolation(c.code, c.messageTemplate).
158		SetParameters(
159		c.messageParameters.Prepend(
160		validation.TemplateParameter{Key: "{{ value }}", Value: *value},
161		)...,
162		).
163		CreateViolation()
164		}
165
166		// IPConstraint is used to validate IP address. You can check for different versions
167		// and restrict some ranges by additional options.
168		type IPConstraint struct {
169		isIgnored bool
170		validate func(value string, restrictions ...validate.IPRestriction) error
171		restrictions []validate.IPRestriction
172
173		invalidCode string
174		prohibitedCode string
175
176		invalidMessageTemplate string
177		invalidMessageParameters validation.TemplateParameterList
178		prohibitedMessageTemplate string
179		prohibitedMessageParameters validation.TemplateParameterList
180		}
181
182		// IsIP creates an IPConstraint to validate an IP address (IPv4 or IPv6).
183		func IsIP() IPConstraint {
184	1	return newIPConstraint(validate.IP)
185		}
186
187		// IsIPv4 creates an IPConstraint to validate an IPv4 address.
188		func IsIPv4() IPConstraint {
189	1	return newIPConstraint(validate.IPv4)
190		}
191
192		// IsIPv6 creates an IPConstraint to validate an IPv4 address.
193		func IsIPv6() IPConstraint {
194	1	return newIPConstraint(validate.IPv6)
195		}
196
197		func newIPConstraint(validate func(value string, restrictions ...validate.IPRestriction) error) IPConstraint {
198	1	return IPConstraint{
199		validate: validate,
200		invalidCode: code.InvalidIP,
201		prohibitedCode: code.ProhibitedIP,
202		invalidMessageTemplate: message.InvalidIP,
203		prohibitedMessageTemplate: message.ProhibitedIP,
204		}
205		}
206
207		// SetUp always returns no error.
208		func (c IPConstraint) SetUp() error {
209	1	return nil
210		}
211
212		// Name is the constraint name.
213		func (c IPConstraint) Name() string {
214		return "IPConstraint"
215		}
216
217		// DenyPrivateIP denies using of private IPs according to RFC 1918 (IPv4 addresses)
218		// and RFC 4193 (IPv6 addresses).
219		func (c IPConstraint) DenyPrivateIP() IPConstraint {
220	1	c.restrictions = append(c.restrictions, validate.DenyPrivateIP())
221	1	return c
222		}
223
224		// DenyIP can be used to deny custom range of IP addresses.
225		func (c IPConstraint) DenyIP(restrict func(ip net.IP) bool) IPConstraint {
226	1	c.restrictions = append(c.restrictions, restrict)
227	1	return c
228		}
229
230		// Codes overrides default codes for produced violation.
231		func (c IPConstraint) Codes(invalidCode, prohibitedCode string) IPConstraint {
232	1	c.invalidCode = invalidCode
233	1	c.prohibitedCode = prohibitedCode
234	1	return c
235		}
236
237		// InvalidMessage sets the violation message template for invalid IP case.
238		// You can set custom template parameters for injecting its values into the final message.
239		// Also, you can use default parameters:
240		//
241		// {{ value }} - the current (invalid) value.
242		func (c IPConstraint) InvalidMessage(template string, parameters ...validation.TemplateParameter) IPConstraint {
243	1	c.invalidMessageTemplate = template
244	1	c.invalidMessageParameters = parameters
245	1	return c
246		}
247
248		// ProhibitedMessage sets the violation message template for prohibited IP case.
249		// You can set custom template parameters for injecting its values into the final message.
250		// Also, you can use default parameters:
251		//
252		// {{ value }} - the current (invalid) value.
253		func (c IPConstraint) ProhibitedMessage(template string, parameters ...validation.TemplateParameter) IPConstraint {
254	1	c.prohibitedMessageTemplate = template
255	1	c.prohibitedMessageParameters = parameters
256	1	return c
257		}
258
259		// When enables conditional validation of this constraint. If the expression evaluates to false,
260		// then the constraint will be ignored.
261		func (c IPConstraint) When(condition bool) IPConstraint {
262	1	c.isIgnored = !condition
263	1	return c
264		}
265
266		func (c IPConstraint) ValidateString(value *string, scope validation.Scope) error {
267	1	if c.isIgnored \|\| value == nil \|\| *value == "" {
268	1	return nil
269		}
270
271	1	return c.validateIP(*value, scope)
272		}
273
274		func (c IPConstraint) validateIP(value string, scope validation.Scope) error {
275	1	err := c.validate(value, c.restrictions...)
276	1	if err == nil {
277	1	return nil
278		}
279
280	1	var builder *validation.ViolationBuilder
281	1	var parameters validation.TemplateParameterList
282
283	1	if errors.Is(err, validate.ErrProhibited) {
284	1	builder = scope.BuildViolation(c.prohibitedCode, c.prohibitedMessageTemplate)
285	1	parameters = c.prohibitedMessageParameters
286		} else {
287	1	builder = scope.BuildViolation(c.invalidCode, c.invalidMessageTemplate)
288	1	parameters = c.invalidMessageParameters
289		}
290
291	1	return builder.
292		SetParameters(
293		parameters.Prepend(
294		validation.TemplateParameter{Key: "{{ value }}", Value: value},
295		)...,
296		).
297		CreateViolation()
298		}
299

muonsoft / validation

Pull Request — main (#50)

it.URLConstraint.ValidateString B

Complexity

Size

Duplication

Code Coverage

Importance

Duplication Side-by-Side

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