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package xgmext
import "github.com/emersion/go-imap"
type threadIDSearch struct {
Charset string
ThreadIDs []string
}
// NewThreadIDSearch return an imap.Command to search UIDs for the provided
// thread IDs using the X-GM-EXT-1 (Gmail extension)
func NewThreadIDSearch(threadIDs []string) *threadIDSearch {
return &threadIDSearch{
Charset: "UTF-8",
ThreadIDs: threadIDs,
}
}
func (cmd *threadIDSearch) Command() *imap.Command {
const threadSearchKey = "X-GM-THRID"
var args []interface{}
if cmd.Charset != "" {
args = append(args, imap.RawString("CHARSET"))
args = append(args, imap.RawString(cmd.Charset))
}
// we want to produce a search query that looks like this:
// SEARCH CHARSET UTF-8 OR OR X-GM-THRID 1771431779961568536 \
// X-GM-THRID 1765355745646219617 X-GM-THRID 1771500774375286796
for i := 0; i < len(cmd.ThreadIDs)-1; i++ {
args = append(args, imap.RawString("OR"))
}
for _, thrid := range cmd.ThreadIDs {
args = append(args, imap.RawString(threadSearchKey))
args = append(args, imap.RawString(thrid))
}
return &imap.Command{
Name: "SEARCH",
Arguments: args,
}
}
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