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package models
import (
"bytes"
"fmt"
"io"
"regexp"
"strings"
"time"
"github.com/emersion/go-message/mail"
)
// Flag is an abstraction around the different flags which can be present in
// different email backends and represents a flag that we use in the UI.
type Flag int
const (
// SeenFlag marks a message as having been seen previously
SeenFlag Flag = iota
// RecentFlag marks a message as being recent
RecentFlag
// AnsweredFlag marks a message as having been replied to
AnsweredFlag
// DeletedFlag marks a message as having been deleted
DeletedFlag
// FlaggedFlag marks a message with a user flag
FlaggedFlag
)
type Directory struct {
Name string
Attributes []string
}
type DirectoryInfo struct {
Name string
Flags []string
ReadOnly bool
// The total number of messages in this mailbox.
Exists int
// The number of messages not seen since the last time the mailbox was opened.
Recent int
// The number of unread messages
Unseen int
}
// A MessageInfo holds information about the structure of a message
type MessageInfo struct {
BodyStructure *BodyStructure
Envelope *Envelope
Flags []Flag
Labels []string
InternalDate time.Time
RFC822Headers *mail.Header
Size uint32
Uid uint32
}
// A MessageBodyPart can be displayed in the message viewer
type MessageBodyPart struct {
Reader io.Reader
Uid uint32
}
// A FullMessage is the entire message
type FullMessage struct {
Reader io.Reader
Uid uint32
}
type BodyStructure struct {
MIMEType string
MIMESubType string
Params map[string]string
Description string
Encoding string
Parts []*BodyStructure
Disposition string
DispositionParams map[string]string
}
//PartAtIndex returns the BodyStructure at the requested index
func (bs *BodyStructure) PartAtIndex(index []int) (*BodyStructure, error) {
if len(index) == 0 {
return bs, nil
}
cur := index[0]
rest := index[1:]
// passed indexes are 1 based, we need to convert back to actual indexes
curidx := cur - 1
if curidx < 0 {
return nil, fmt.Errorf("invalid index, expected 1 based input")
}
// no children, base case
if len(bs.Parts) == 0 {
if len(rest) != 0 {
return nil, fmt.Errorf("more index levels given than available")
}
if cur == 1 {
return bs, nil
} else {
return nil, fmt.Errorf("invalid index %v for non multipart", cur)
}
}
if cur > len(bs.Parts) {
return nil, fmt.Errorf("invalid index %v, only have %v children",
cur, len(bs.Parts))
}
return bs.Parts[curidx].PartAtIndex(rest)
}
type Envelope struct {
Date time.Time
Subject string
From []*Address
ReplyTo []*Address
To []*Address
Cc []*Address
Bcc []*Address
MessageId string
}
type Address struct {
Name string
Mailbox string
Host string
}
var atom *regexp.Regexp = regexp.MustCompile("^[a-z0-9!#$%7'*+-/=?^_`{}|~ ]+$")
func (a Address) Format() string {
if a.Name != "" {
if atom.MatchString(a.Name) {
return fmt.Sprintf("%s <%s@%s>", a.Name, a.Mailbox, a.Host)
} else {
return fmt.Sprintf("\"%s\" <%s@%s>",
strings.ReplaceAll(a.Name, "\"", "'"),
a.Mailbox, a.Host)
}
} else {
return fmt.Sprintf("<%s@%s>", a.Mailbox, a.Host)
}
}
// FormatAddresses formats a list of addresses, separating each by a comma
func FormatAddresses(addrs []*Address) string {
val := bytes.Buffer{}
for i, addr := range addrs {
val.WriteString(addr.Format())
if i != len(addrs)-1 {
val.WriteString(", ")
}
}
return val.String()
}
|
