Fossil

/*
** Rewind the cursor on a blob back to the beginning.
*/
void blob_rewind(Blob *p){
  p->iCursor = 0;
}

/*
** Truncate a blob back to zero length
*/
void blob_truncate(Blob *p){
  p->nUsed = 0;
}

/*
** Seek the cursor in a blob to the indicated offset.
*/
int blob_seek(Blob *p, int offset, int whence){
  if( whence==BLOB_SEEK_SET ){
    p->iCursor = offset;

  }
  email_free_eventlist(pEvent);
  email_footer(&out);
  fossil_print("%s", blob_str(&out));
  blob_zero(&out);
  db_end_transaction(0);
}

#if INTERFACE
/*
** Flags for email_send_alerts()
*/
#define SENDALERT_DIGEST      0x0001    /* Send a digest */
#define SENDALERT_PRESERVE    0x0002    /* Do not mark the task as done */

#endif /* INTERFACE */

/*
** Send alert emails to all subscribers
*/
void email_send_alerts(u32 flags){
  EmailEvent *pEvents, *p;
  int nEvent = 0;
  Stmt q;
  const char *zDigest = "false";
  Blob hdr, body;
  const char *zUrl;
  const char *zRepoName;
  const char *zFrom;

  if( !email_enabled() ) return;
  zUrl = db_get("email-url",0);
  if( zUrl==0 ) return;
  zRepoName = db_get("email-subname",0);
  if( zRepoName==0 ) return;
  zFrom = db_get("email-self",0);
  if( zFrom==0 ) return;
  db_multi_exec(
    "DROP TABLE IF EXISTS temp.wantalert;"
    "CREATE TEMP TABLE wantalert(eventId TEXT);"
  );
  if( flags & SENDALERT_DIGEST ){
    db_multi_exec(
      "INSERT INTO wantalert SELECT eventid FROM pending_alert"
      "  WHERE sentDigest IS FALSE"
    );
    zDigest = "true";
  }else{
    db_multi_exec(
      "INSERT INTO wantalert SELECT eventid FROM pending_alert"
      "  WHERE sentSep IS FALSE"
    );
  }
  pEvents = email_compute_event_text(&nEvent);
  if( nEvent==0 ) return;
  blob_init(&hdr, 0, 0);
  blob_init(&body, 0, 0);
  db_prepare(&q,
     "SELECT"
     " subscriberCode,"  /* 0 */
     " semail,"          /* 1 */
     " ssub"             /* 2 */
     " FROM subscriber"
     " WHERE sverified AND NOT sdonotcall"
     "  AND sdigest IS %s",
     zDigest/*safe-for-%s*/
  );
  while( db_step(&q)==SQLITE_ROW ){
    const char *zCode = db_column_text(&q, 0);
    const char *zSub = db_column_text(&q, 2);
    const char *zEmail = db_column_text(&q, 1);
    int nHit = 0;
    for(p=pEvents; p; p=p->pNext){
      if( strchr(zSub,p->type)==0 ) continue;
      if( nHit==0 ){
        blob_appendf(&hdr,"To: %s\n", zEmail);
        blob_appendf(&hdr,"From: %s\n", zFrom);
        blob_appendf(&hdr,"Subject: %s activity alert\n", zRepoName);
        blob_appendf(&body,
          "This is an automated email sent by the Fossil repository "
          "at %s to alert you to changes.\n",
          zUrl
        );
      }
      nHit++;
      blob_append(&body, "\n", 1);
      blob_append(&body, blob_buffer(&p->txt), blob_size(&p->txt));
    }
    if( nHit==0 ) continue;
    blob_appendf(&body,"\n%.72c\nSubscription info: %s/alerts/%s\n",
         '-', zUrl, zCode);
    email_send(&hdr,&body,0,0);
    blob_truncate(&hdr);
    blob_truncate(&body);
  }
  blob_zero(&hdr);
  blob_zero(&body);
  db_finalize(&q);
  email_free_eventlist(pEvents);
  if( (flags & SENDALERT_PRESERVE)==0 ){
    if( flags & SENDALERT_DIGEST ){
      db_multi_exec("UPDATE pending_alert SET sentDigest=true");
    }else{
      db_multi_exec("UPDATE pending_alert SET sentSep=true");
    }
    db_multi_exec("DELETE FROM pending_alert WHERE sentDigest AND sentSep");
  }
}