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package lib
import (
"io/ioutil"
"net/textproto"
"strings"
"unicode"
"git.sr.ht/~sircmpwn/getopt"
"git.sr.ht/~rjarry/aerc/models"
)
type searchCriteria struct {
Header textproto.MIMEHeader
Body []string
Text []string
WithFlags []models.Flag
WithoutFlags []models.Flag
}
func GetSearchCriteria(args []string) (*searchCriteria, error) {
criteria := &searchCriteria{Header: make(textproto.MIMEHeader)}
opts, optind, err := getopt.Getopts(args, "rux:X:bat:H:f:c:")
if err != nil {
return nil, err
}
body := false
text := false
for _, opt := range opts {
switch opt.Option {
case 'r':
criteria.WithFlags = append(criteria.WithFlags, models.SeenFlag)
case 'u':
criteria.WithoutFlags = append(criteria.WithoutFlags, models.SeenFlag)
case 'x':
criteria.WithFlags = append(criteria.WithFlags, getParsedFlag(opt.Value))
case 'X':
criteria.WithoutFlags = append(criteria.WithoutFlags, getParsedFlag(opt.Value))
case 'H':
// TODO
case 'f':
criteria.Header.Add("From", opt.Value)
case 't':
criteria.Header.Add("To", opt.Value)
case 'c':
criteria.Header.Add("Cc", opt.Value)
case 'b':
body = true
case 'a':
text = true
}
}
if text {
criteria.Text = args[optind:]
} else if body {
criteria.Body = args[optind:]
} else {
for _, arg := range args[optind:] {
criteria.Header.Add("Subject", arg)
}
}
return criteria, nil
}
func getParsedFlag(name string) models.Flag {
var f models.Flag
switch strings.ToLower(name) {
case "seen":
f = models.SeenFlag
case "answered":
f = models.AnsweredFlag
case "flagged":
f = models.FlaggedFlag
}
return f
}
func Search(messages []RawMessage, criteria *searchCriteria) ([]uint32, error) {
requiredParts := getRequiredParts(criteria)
matchedUids := []uint32{}
for _, m := range messages {
success, err := searchMessage(m, criteria, requiredParts)
if err != nil {
return nil, err
} else if success {
matchedUids = append(matchedUids, m.UID())
}
}
return matchedUids, nil
}
// searchMessage executes the search criteria for the given RawMessage,
// returns true if search succeeded
func searchMessage(message RawMessage, criteria *searchCriteria,
parts MsgParts,
) (bool, error) {
// setup parts of the message to use in the search
// this is so that we try to minimise reading unnecessary parts
var (
flags []models.Flag
header *models.MessageInfo
body string
all string
err error
)
if parts&FLAGS > 0 {
flags, err = message.ModelFlags()
if err != nil {
return false, err
}
}
if parts&HEADER > 0 {
header, err = MessageInfo(message)
if err != nil {
return false, err
}
}
if parts&BODY > 0 {
// TODO: select body properly; this is just an 'all' clone
reader, err := message.NewReader()
if err != nil {
return false, err
}
defer reader.Close()
bytes, err := ioutil.ReadAll(reader)
if err != nil {
return false, err
}
body = string(bytes)
}
if parts&ALL > 0 {
reader, err := message.NewReader()
if err != nil {
return false, err
}
defer reader.Close()
bytes, err := ioutil.ReadAll(reader)
if err != nil {
return false, err
}
all = string(bytes)
}
// now search through the criteria
// implicit AND at the moment so fail fast
if criteria.Header != nil {
for k, v := range criteria.Header {
headerValue := header.RFC822Headers.Get(k)
for _, text := range v {
if !containsSmartCase(headerValue, text) {
return false, nil
}
}
}
}
if criteria.Body != nil {
for _, searchTerm := range criteria.Body {
if !containsSmartCase(body, searchTerm) {
return false, nil
}
}
}
if criteria.Text != nil {
for _, searchTerm := range criteria.Text {
if !containsSmartCase(all, searchTerm) {
return false, nil
}
}
}
if criteria.WithFlags != nil {
for _, searchFlag := range criteria.WithFlags {
if !containsFlag(flags, searchFlag) {
return false, nil
}
}
}
if criteria.WithoutFlags != nil {
for _, searchFlag := range criteria.WithoutFlags {
if containsFlag(flags, searchFlag) {
return false, nil
}
}
}
return true, nil
}
// containsFlag returns true if searchFlag appears in flags
func containsFlag(flags []models.Flag, searchFlag models.Flag) bool {
match := false
for _, flag := range flags {
if searchFlag == flag {
match = true
}
}
return match
}
// containsSmartCase is a smarter version of strings.Contains for searching.
// Is case-insensitive unless substr contains an upper case character
func containsSmartCase(s string, substr string) bool {
if hasUpper(substr) {
return strings.Contains(s, substr)
}
return strings.Contains(strings.ToLower(s), strings.ToLower(substr))
}
func hasUpper(s string) bool {
for _, r := range s {
if unicode.IsUpper(r) {
return true
}
}
return false
}
// The parts of a message, kind of
type MsgParts int
const NONE MsgParts = 0
const (
FLAGS MsgParts = 1 << iota
HEADER
BODY
ALL
)
// Returns a bitmask of the parts of the message required to be loaded for the
// given criteria
func getRequiredParts(criteria *searchCriteria) MsgParts {
required := NONE
if len(criteria.Header) > 0 {
required |= HEADER
}
if criteria.Body != nil && len(criteria.Body) > 0 {
required |= BODY
}
if criteria.Text != nil && len(criteria.Text) > 0 {
required |= ALL
}
if criteria.WithFlags != nil && len(criteria.WithFlags) > 0 {
required |= FLAGS
}
if criteria.WithoutFlags != nil && len(criteria.WithoutFlags) > 0 {
required |= FLAGS
}
return required
}
|
