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102 lines
2.0 KiB
102 lines
2.0 KiB
package stanza
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import (
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"fmt"
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"strings"
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"unicode"
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)
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type Jid struct {
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Node string
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Domain string
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Resource string
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}
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func NewJid(sjid string) (*Jid, error) {
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jid := new(Jid)
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if sjid == "" {
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return jid, fmt.Errorf("jid cannot be empty")
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}
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s1 := strings.SplitN(sjid, "@", 2)
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if len(s1) == 1 { // This is a server or component Jid
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jid.Domain = s1[0]
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} else { // Jid has a local username part
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if s1[0] == "" {
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return jid, fmt.Errorf("invalid jid '%s", sjid)
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}
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jid.Node = s1[0]
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if s1[1] == "" {
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return jid, fmt.Errorf("domain cannot be empty")
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}
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jid.Domain = s1[1]
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}
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// Extract resource from domain field
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s2 := strings.SplitN(jid.Domain, "/", 2)
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if len(s2) == 2 { // If len = 1, domain is already correct, and resource is already empty
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jid.Domain = s2[0]
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jid.Resource = s2[1]
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}
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if !isUsernameValid(jid.Node) {
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return jid, fmt.Errorf("invalid Node in Jid '%s'", sjid)
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}
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if !isDomainValid(jid.Domain) {
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return jid, fmt.Errorf("invalid domain in Jid '%s'", sjid)
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}
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return jid, nil
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}
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func (j *Jid) Full() string {
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if j.Resource == "" {
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return j.Bare()
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} else if j.Node == "" {
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return j.Node + "/" + j.Resource
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} else {
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return j.Node + "@" + j.Domain + "/" + j.Resource
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}
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}
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func (j *Jid) Bare() string {
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if j.Node == "" {
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return j.Domain
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} else {
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return j.Node + "@" + j.Domain
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}
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}
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// ============================================================================
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// Helpers, for parsing / validation
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func isUsernameValid(username string) bool {
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invalidRunes := []rune{'@', '/', '\'', '"', ':', '<', '>'}
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return strings.IndexFunc(username, isInvalid(invalidRunes)) < 0
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}
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func isDomainValid(domain string) bool {
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if len(domain) == 0 {
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return false
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}
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invalidRunes := []rune{'@', '/'}
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return strings.IndexFunc(domain, isInvalid(invalidRunes)) < 0
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}
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func isInvalid(invalidRunes []rune) func(c rune) bool {
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isInvalid := func(c rune) bool {
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if unicode.IsSpace(c) {
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return true
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}
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for _, r := range invalidRunes {
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if c == r {
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return true
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}
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}
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return false
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}
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return isInvalid
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}
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