aboutsummaryrefslogtreecommitdiff
path: root/pkg/config/url.go
blob: 4b3abf7befe02431726314999a24c999400444d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
package config

import (
	"fmt"
	"net"
	"net/url"
	"strings"

	"gopkg.in/yaml.v3"
)

type Url struct {
	Scheme   string `yaml:"scheme"`
	User     string `yaml:"user"`
	Password string `yaml:"password"`
	Host     string `yaml:"host"`
	Port     string `yaml:"port"`
	Root     string `yaml:"root"`
}

func (u *Url) Empty() bool {
	return u.Host == ""
}

func (u *Url) EmptyRoot() bool {
	return u.Root == "" || u.Root == "/"
}

func (u *Url) UnmarshalYAML(value *yaml.Node) (err error) {
	if value.ShortTag() == strTag {
		var val string
		var rawUrl *url.URL

		if err = value.Decode(&val); err != nil {
			return err
		}
		if rawUrl, err = url.Parse(val); err != nil {
			return err
		}

		u.Scheme = rawUrl.Scheme
		u.User = rawUrl.User.Username()
		u.Password, _ = rawUrl.User.Password()
		u.Host = rawUrl.Hostname()
		u.Port = rawUrl.Port()
		u.Root = rawUrl.Path
	} else {
		type _url Url // avoid recursion
		wrapped := (*_url)(u)
		if err = value.Decode(wrapped); err != nil {
			return err
		}
	}

	u.sanitize()

	if errors := u.validate(); len(errors) > 0 {
		errs := make([]string, len(errors)+1)
		copy(errs[1:], errors)
		errs[0] = fmt.Sprintf("line %d: Invalid target:", value.Line)
		return &yaml.TypeError{Errors: errs}
	}

	return nil
}

func (u Url) String() string {
	var sb strings.Builder

	sb.WriteString(u.Scheme)
	sb.WriteString("://")

	if u.User != "" {
		sb.WriteString(u.User)
		if u.Password != "" {
			sb.WriteString(":******")
		}
		sb.WriteRune('@')
	}

	sb.WriteString(u.HostPort())

	if u.Root != "" {
		if u.Root[0] != '/' {
			sb.WriteRune('/')
		}
		sb.WriteString(u.Root)
	}

	return sb.String()
}

func (u *Url) HostPort() string {
	if u.Port != "" {
		return net.JoinHostPort(u.Host, u.Port)
	}
	return u.Host
}

const (
	imapsPort         = "993"
	imapPort          = "143"
	imapsSchema       = "imaps"
	imapsSchemaFull   = imapsSchema + "://"
	imapSchema        = "imap"
	imapSchemaFull    = imapSchema + "://"
	maildirSchemaFull = "maildir://"
)

func isRecognizedUrl(s string) bool {
	return isImapUrl(s) || isMaildirUrl(s)

}

func isImapUrl(s string) bool {
	return strings.HasPrefix(s, imapsSchemaFull) || strings.HasPrefix(s, imapSchemaFull)
}

func isMaildirUrl(s string) bool {
	return strings.HasPrefix(s, maildirSchemaFull)
}

func (u *Url) ForceTLS() bool {
	return u.Scheme == imapsSchema || u.Port == imapsPort
}

func (u *Url) setDefaultScheme() {
	if u.Scheme == "" {
		if u.Port == imapsPort {
			u.Scheme = imapsSchema
		} else {
			u.Scheme = imapSchema
		}
	}
}

func (u *Url) setDefaultPort() {
	if u.Port == "" {
		if u.Scheme == imapsSchema {
			u.Port = imapsPort
		} else {
			u.Port = imapPort
		}
	}
}

func (u *Url) sanitize() {
	u.setDefaultScheme()
	u.setDefaultPort()
}

func (u *Url) validate() (errors []string) {
	if u.Scheme != imapSchema && u.Scheme != imapsSchema {
		errors = append(errors, fmt.Sprintf("Unknown scheme %q", u.Scheme))
	}

	if u.Host == "" {
		errors = append(errors, "Host not set")
	}

	return
}

func (u Url) BaseUrl() Url {
	// 'u' is not a pointer and thus a copy, modification is fine
	u.Root = ""
	return u
}

func (u *Url) CommonBaseUrl(other Url) bool {
	other.Root = ""
	return other == u.BaseUrl()
}

func (u *Url) RootPath() []string {
	path := u.Root
	if path[0] == '/' {
		path = path[1:]
	}
	return strings.Split(path, "/")
}