422 lines
9.9 KiB
Go
422 lines
9.9 KiB
Go
package format
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import (
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"errors"
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"fmt"
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"regexp"
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"strings"
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"time"
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"unicode"
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"git.sr.ht/~rjarry/aerc/models"
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"github.com/emersion/go-message/mail"
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"github.com/mattn/go-runewidth"
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)
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// AddressForHumans formats the address. If the address's name
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// contains non-ASCII characters it will be quoted but not encoded.
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// Meant for display purposes to the humans, not for sending over the wire.
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func AddressForHumans(a *mail.Address) string {
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if a.Name != "" {
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if atom.MatchString(a.Name) {
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return fmt.Sprintf("%s <%s>", a.Name, a.Address)
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} else {
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return fmt.Sprintf("\"%s\" <%s>",
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strings.ReplaceAll(a.Name, "\"", "'"), a.Address)
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}
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} else {
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return fmt.Sprintf("<%s>", a.Address)
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}
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}
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var atom *regexp.Regexp = regexp.MustCompile("^[a-z0-9!#$%7'*+-/=?^_`{}|~ ]+$")
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// FormatAddresses formats a list of addresses into a human readable string
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func FormatAddresses(l []*mail.Address) string {
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formatted := make([]string, len(l))
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for i, a := range l {
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formatted[i] = AddressForHumans(a)
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}
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return strings.Join(formatted, ", ")
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}
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// CompactPath reduces a directory path into a compact form. The directory
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// name will be split with the provided separator and each part will be reduced
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// to the first letter in its name: INBOX/01_WORK/PROJECT will become
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// I/W/PROJECT.
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func CompactPath(name string, sep rune) (compact string) {
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parts := strings.Split(name, string(sep))
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for i, part := range parts {
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if i == len(parts)-1 {
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compact += part
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} else {
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if len(part) != 0 {
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r := part[0]
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for i := 0; i < len(part)-1; i++ {
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if unicode.IsLetter(rune(part[i])) {
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r = part[i]
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break
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}
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}
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compact += fmt.Sprintf("%c%c", r, sep)
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} else {
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compact += fmt.Sprintf("%c", sep)
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}
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}
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}
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return
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}
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type Ctx struct {
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FromAddress string
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AccountName string
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MsgNum int
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MsgInfo *models.MessageInfo
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MsgIsMarked bool
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// UI controls for threading
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ThreadPrefix string
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ThreadSameSubject bool
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}
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func ParseMessageFormat(format string, timeFmt string, thisDayTimeFmt string,
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thisWeekTimeFmt string, thisYearTimeFmt string, ctx Ctx) (
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string, []interface{}, error,
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) {
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if ctx.MsgInfo.Error != nil {
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return "", nil,
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errors.New("(unable to fetch header)")
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}
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retval := make([]byte, 0, len(format))
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var args []interface{}
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accountFromAddress, err := mail.ParseAddress(ctx.FromAddress)
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if err != nil {
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return "", nil, err
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}
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envelope := ctx.MsgInfo.Envelope
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if envelope == nil {
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return "", nil,
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errors.New("no envelope available for this message")
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}
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var c rune
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for i, ni := 0, 0; i < len(format); {
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ni = strings.IndexByte(format[i:], '%')
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if ni < 0 {
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ni = len(format)
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retval = append(retval, []byte(format[i:ni])...)
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break
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}
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ni += i + 1
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// Check for fmt flags
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if ni == len(format) {
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goto handle_end_error
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}
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c = rune(format[ni])
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if c == '+' || c == '-' || c == '#' || c == ' ' || c == '0' {
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ni++
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}
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// Check for precision and width
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if ni == len(format) {
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goto handle_end_error
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}
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c = rune(format[ni])
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for unicode.IsDigit(c) {
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ni++
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c = rune(format[ni])
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}
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if c == '.' {
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ni++
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c = rune(format[ni])
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for unicode.IsDigit(c) {
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ni++
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c = rune(format[ni])
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}
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}
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retval = append(retval, []byte(format[i:ni])...)
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// Get final format verb
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if ni == len(format) {
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goto handle_end_error
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}
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c = rune(format[ni])
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switch c {
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case '%':
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retval = append(retval, '%')
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case 'a':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := envelope.From[0]
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retval = append(retval, 's')
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args = append(args, addr.Address)
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case 'A':
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var addr *mail.Address
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if len(envelope.ReplyTo) == 0 {
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender or reply-to")
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} else {
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addr = envelope.From[0]
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}
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} else {
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addr = envelope.ReplyTo[0]
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}
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retval = append(retval, 's')
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args = append(args, addr.Address)
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case 'C':
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retval = append(retval, 'd')
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args = append(args, ctx.MsgNum)
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case 'd':
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date := envelope.Date
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if date.IsZero() {
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date = ctx.MsgInfo.InternalDate
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}
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retval = append(retval, 's')
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args = append(args,
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DummyIfZeroDate(date.Local(),
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timeFmt, thisDayTimeFmt,
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thisWeekTimeFmt, thisYearTimeFmt))
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case 'D':
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date := envelope.Date
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if date.IsZero() {
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date = ctx.MsgInfo.InternalDate
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}
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retval = append(retval, 's')
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args = append(args,
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DummyIfZeroDate(date.Local(),
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timeFmt, thisDayTimeFmt,
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thisWeekTimeFmt, thisYearTimeFmt))
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case 'f':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := AddressForHumans(envelope.From[0])
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retval = append(retval, 's')
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args = append(args, addr)
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case 'F':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := envelope.From[0]
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var val string
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if addr.Name == accountFromAddress.Name && len(envelope.To) != 0 {
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addr = envelope.To[0]
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}
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if addr.Name != "" {
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val = addr.Name
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} else {
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val = addr.Address
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}
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retval = append(retval, 's')
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args = append(args, val)
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case 'g':
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retval = append(retval, 's')
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args = append(args, strings.Join(ctx.MsgInfo.Labels, ", "))
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case 'i':
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retval = append(retval, 's')
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args = append(args, envelope.MessageId)
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case 'n':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := envelope.From[0]
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var val string
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if addr.Name != "" {
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val = addr.Name
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} else {
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val = addr.Address
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}
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retval = append(retval, 's')
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args = append(args, val)
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case 'r':
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addrs := FormatAddresses(envelope.To)
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retval = append(retval, 's')
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args = append(args, addrs)
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case 'R':
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addrs := FormatAddresses(envelope.Cc)
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retval = append(retval, 's')
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args = append(args, addrs)
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case 's':
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retval = append(retval, 's')
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// if we are threaded strip the repeated subjects unless it's the
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// first on the screen
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subject := envelope.Subject
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if ctx.ThreadSameSubject {
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subject = ""
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}
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args = append(args, ctx.ThreadPrefix+subject)
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case 't':
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if len(envelope.To) == 0 {
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return "", nil,
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errors.New("found no address for recipient")
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}
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addr := envelope.To[0]
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retval = append(retval, 's')
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args = append(args, addr.Address)
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case 'T':
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retval = append(retval, 's')
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args = append(args, ctx.AccountName)
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case 'u':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := envelope.From[0]
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mailbox := addr.Address // fallback if there's no @ sign
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if split := strings.SplitN(addr.Address, "@", 2); len(split) == 2 {
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mailbox = split[1]
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}
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retval = append(retval, 's')
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args = append(args, mailbox)
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case 'v':
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if len(envelope.From) == 0 {
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return "", nil,
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errors.New("found no address for sender")
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}
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addr := envelope.From[0]
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// check if message is from current user
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if addr.Name != "" {
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retval = append(retval, 's')
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args = append(args,
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strings.Split(addr.Name, " ")[0])
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}
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case 'Z':
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// calculate all flags
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readReplyFlag := ""
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delFlag := ""
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flaggedFlag := ""
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markedFlag := ""
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seen := false
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recent := false
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answered := false
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for _, flag := range ctx.MsgInfo.Flags {
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switch flag {
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case models.SeenFlag:
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seen = true
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case models.RecentFlag:
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recent = true
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case models.AnsweredFlag:
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answered = true
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}
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if flag == models.DeletedFlag {
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delFlag = "D"
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// TODO: check if attachments
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}
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if flag == models.FlaggedFlag {
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flaggedFlag = "!"
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}
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// TODO: check gpg stuff
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}
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if seen {
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if answered {
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readReplyFlag = "r" // message has been replied to
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}
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} else {
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if recent {
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readReplyFlag = "N" // message is new
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} else {
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readReplyFlag = "O" // message is old
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}
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}
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if ctx.MsgIsMarked {
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markedFlag = "*"
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}
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retval = append(retval, '4', 's')
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args = append(args, readReplyFlag+delFlag+flaggedFlag+markedFlag)
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// Move the below cases to proper alphabetical positions once
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// implemented
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case 'l':
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// TODO: number of lines in the message
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retval = append(retval, 'd')
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args = append(args, ctx.MsgInfo.Size)
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case 'e':
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// TODO: current message number in thread
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fallthrough
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case 'E':
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// TODO: number of messages in current thread
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fallthrough
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case 'H':
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// TODO: spam attribute(s) of this message
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fallthrough
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case 'L':
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// TODO:
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fallthrough
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case 'X':
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// TODO: number of attachments
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fallthrough
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case 'y':
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// TODO: X-Label field
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fallthrough
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case 'Y':
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// TODO: X-Label field and some other constraints
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fallthrough
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default:
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// Just ignore it and print as is
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// so %k in index format becomes %%k to Printf
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retval = append(retval, '%')
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retval = append(retval, byte(c))
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}
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i = ni + 1
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}
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const zeroWidthSpace rune = '\u200b'
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for i, val := range args {
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if s, ok := val.(string); ok {
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var out strings.Builder
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for _, r := range s {
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w := runewidth.RuneWidth(r)
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for w > 1 {
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out.WriteRune(zeroWidthSpace)
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w -= 1
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}
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out.WriteRune(r)
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}
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args[i] = out.String()
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}
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}
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return string(retval), args, nil
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handle_end_error:
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return "", nil,
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errors.New("reached end of string while parsing message format")
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}
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func DummyIfZeroDate(date time.Time, format string, todayFormat string,
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thisWeekFormat string, thisYearFormat string,
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) string {
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if date.IsZero() {
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return strings.Repeat("?", len(format))
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}
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year := date.Year()
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day := date.YearDay()
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now := time.Now()
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thisYear := now.Year()
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thisDay := now.YearDay()
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if year == thisYear {
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if day == thisDay && todayFormat != "" {
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return date.Format(todayFormat)
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}
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if day > thisDay-7 && thisWeekFormat != "" {
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return date.Format(thisWeekFormat)
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}
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if thisYearFormat != "" {
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return date.Format(thisYearFormat)
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}
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}
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return date.Format(format)
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}
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