lib-storage: Include "age_days" field in mail.event

Goes back one week, if mail age information is known, an integer field is added
with value of mail age in number of days.

diff --git a/src/lib-storage/index/index-mail.c b/src/lib-storage/index/index-mail.c
index 7e1a6f3dd125475c0ca032c10a72b5ef2ab4905a..847e09e6f541ad891f2800ee11980b2cbca34721 100644 (file)
--- a/src/lib-storage/index/index-mail.c
+++ b/src/lib-storage/index/index-mail.c
@@ -2042,9 +2042,36 @@ void index_mail_update_access_parts_post(struct mail *_mail)
        }
 }
 
+static bool index_mail_get_age_days(struct mail *mail, int *days_r)
+{
+       int age_days;
+       const struct mail_index_header *hdr =
+               mail_index_get_header(mail->transaction->view);
+       int n_days = N_ELEMENTS(hdr->day_first_uid);
+
+       for (age_days = 0; age_days < n_days; age_days++) {
+               if (mail->uid >= hdr->day_first_uid[age_days])
+                       break;
+       }
+
+       if (age_days == n_days) {
+               /* mail is too old, cannot determine its age from
+                  day_first_uid[]. */
+               return FALSE;
+       }
+
+       if (hdr->day_stamp != 0) {
+               /* offset for hdr->day_stamp */
+               age_days += (ioloop_time - hdr->day_stamp) / (3600 * 24);
+       }
+       *days_r = age_days;
+       return TRUE;
+}
+
 void index_mail_set_seq(struct mail *_mail, uint32_t seq, bool saving)
 {
        struct index_mail *mail = INDEX_MAIL(_mail);
+       int age_days;
 
        if (mail->data.seq == seq) {
                if (!saving)
@@ -2068,6 +2095,10 @@ void index_mail_set_seq(struct mail *_mail, uint32_t seq, bool saving)
        index_mail_init_event(_mail);
        event_add_int(_mail->event, "seq", _mail->seq);
        event_add_int(_mail->event, "uid", _mail->uid);
+       /* Add mail age field to event. */
+       if (index_mail_get_age_days(_mail, &age_days))
+               event_add_int(_mail->event, "mail_age_days", age_days);
+
        event_set_append_log_prefix(_mail->event, t_strdup_printf(
                "%sUID %u: ", saving ? "saving " : "", _mail->uid));