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|
package lib
import (
"io"
"strings"
"unicode"
"git.sr.ht/~rjarry/aerc/lib"
"git.sr.ht/~rjarry/aerc/lib/log"
"git.sr.ht/~rjarry/aerc/lib/rfc822"
"git.sr.ht/~rjarry/aerc/models"
"git.sr.ht/~rjarry/aerc/worker/types"
"git.sr.ht/~rjarry/go-opt"
)
func Search(messages []rfc822.RawMessage, criteria *types.SearchCriteria) ([]uint32, error) {
criteria.PrepareHeader()
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 rfc822.RawMessage, criteria *types.SearchCriteria,
parts MsgParts,
) (bool, error) {
if criteria == nil {
return true, nil
}
// setup parts of the message to use in the search
// this is so that we try to minimise reading unnecessary parts
var (
flags models.Flags
info *models.MessageInfo
text string
err error
)
if parts&FLAGS > 0 {
flags, err = message.ModelFlags()
if err != nil {
return false, err
}
}
if parts&HEADER > 0 || parts&DATE > 0 || (parts&(BODY|ALL)) == 0 {
info, err = rfc822.MessageInfo(message)
if err != nil {
return false, err
}
}
switch {
case parts&BODY > 0:
path := lib.FindFirstNonMultipart(info.BodyStructure, nil)
reader, err := message.NewReader()
if err != nil {
return false, err
}
defer reader.Close()
msg, err := rfc822.ReadMessage(reader)
if err != nil {
return false, err
}
part, err := rfc822.FetchEntityPartReader(msg, path)
if err != nil {
return false, err
}
bytes, err := io.ReadAll(part)
if err != nil {
return false, err
}
text = string(bytes)
case parts&ALL > 0:
reader, err := message.NewReader()
if err != nil {
return false, err
}
defer reader.Close()
bytes, err := io.ReadAll(reader)
if err != nil {
return false, err
}
text = string(bytes)
default:
text = info.Envelope.Subject
}
// now search through the criteria
// implicit AND at the moment so fail fast
if criteria.Headers != nil {
for k, v := range criteria.Headers {
headerValue := info.RFC822Headers.Get(k)
for _, text := range v {
if !containsSmartCase(headerValue, text) {
return false, nil
}
}
}
}
args := opt.LexArgs(strings.Join(criteria.Terms, " "))
for _, searchTerm := range args.Args() {
if !containsSmartCase(text, searchTerm) {
return false, nil
}
}
if criteria.WithFlags != 0 {
if !flags.Has(criteria.WithFlags) {
return false, nil
}
}
if criteria.WithoutFlags != 0 {
if flags.Has(criteria.WithoutFlags) {
return false, nil
}
}
if parts&DATE > 0 {
if date, err := info.RFC822Headers.Date(); err != nil {
log.Errorf("Failed to get date from header: %v", err)
} else {
if !criteria.StartDate.IsZero() {
if date.Before(criteria.StartDate) {
return false, nil
}
}
if !criteria.EndDate.IsZero() {
if date.After(criteria.EndDate) {
return false, nil
}
}
}
}
return true, nil
}
// 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
DATE
BODY
ALL
)
// Returns a bitmask of the parts of the message required to be loaded for the
// given criteria
func GetRequiredParts(criteria *types.SearchCriteria) MsgParts {
required := NONE
if criteria == nil {
return required
}
if len(criteria.Headers) > 0 {
required |= HEADER
}
if !criteria.StartDate.IsZero() || !criteria.EndDate.IsZero() {
required |= DATE
}
if criteria.SearchBody {
required |= BODY
}
if criteria.SearchAll {
required |= ALL
}
if criteria.WithFlags != 0 {
required |= FLAGS
}
if criteria.WithoutFlags != 0 {
required |= FLAGS
}
return required
}
|
